gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use File::Spec;
  21 use Time::HiRes qw(gettimeofday tv_interval);
  22 use Time::Local;
  23 use constant GITWEB_CACHE_FORMAT => "Gitweb Cache Format 3";
  24 binmode STDOUT, ':utf8';
  25
  26 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  27         eval 'sub CGI::multi_param { CGI::param(@_) }'
  28 }
  29
  30 our $t0 = [ gettimeofday() ];
  31 our $number_of_git_cmds = 0;
  32
  33 BEGIN {
  34         CGI->compile() if $ENV{'MOD_PERL'};
  35 }
  36
  37 our $version = "++GIT_VERSION++";
  38
  39 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  40 sub evaluate_uri {
  41         our $cgi;
  42
  43         our $my_url = $cgi->url();
  44         our $my_uri = $cgi->url(-absolute => 1);
  45
  46         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  47         # needed and used only for URLs with nonempty PATH_INFO
  48         # This must be an absolute URL (i.e. no scheme, host or port), NOT a full one
  49         our $base_url = $my_uri || '/';
  50
  51         # When the script is used as DirectoryIndex, the URL does not contain the name
  52         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  53         # have to do it ourselves. We make $path_info global because it's also used
  54         # later on.
  55         #
  56         # Another issue with the script being the DirectoryIndex is that the resulting
  57         # $my_url data is not the full script URL: this is good, because we want
  58         # generated links to keep implying the script name if it wasn't explicitly
  59         # indicated in the URL we're handling, but it means that $my_url cannot be used
  60         # as base URL.
  61         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  62         # to build the base URL ourselves:
  63         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  64         if ($path_info) {
  65                 # $path_info has already been URL-decoded by the web server, but
  66                 # $my_url and $my_uri have not. URL-decode them so we can properly
  67                 # strip $path_info.
  68                 $my_url = unescape($my_url);
  69                 $my_uri = unescape($my_uri);
  70                 if ($my_url =~ s,\Q$path_info\E$,, &&
  71                     $my_uri =~ s,\Q$path_info\E$,, &&
  72                     defined $ENV{'SCRIPT_NAME'}) {
  73                         $base_url = $ENV{'SCRIPT_NAME'} || '/';
  74                 }
  75         }
  76
  77         # target of the home link on top of all pages
  78         our $home_link = $my_uri || "/";
  79 }
  80
  81 # core git executable to use
  82 # this can just be "git" if your webserver has a sensible PATH
  83 our $GIT = "++GIT_BINDIR++/git";
  84
  85 # absolute fs-path which will be prepended to the project path
  86 #our $projectroot = "/pub/scm";
  87 our $projectroot = "++GITWEB_PROJECTROOT++";
  88
  89 # fs traversing limit for getting project list
  90 # the number is relative to the projectroot
  91 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  92
  93 # string of the home link on top of all pages
  94 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  95
  96 # extra breadcrumbs preceding the home link
  97 our @extra_breadcrumbs = ();
  98
  99 # name of your site or organization to appear in page titles
 100 # replace this with something more descriptive for clearer bookmarks
 101 our $site_name = "++GITWEB_SITENAME++"
 102                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 103
 104 # html snippet to include in the <head> section of each page
 105 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 106 # filename of html text to include at top of each page
 107 our $site_header = "++GITWEB_SITE_HEADER++";
 108 # html text to include at home page
 109 our $home_text = "++GITWEB_HOMETEXT++";
 110 # filename of html text to include at bottom of each page
 111 our $site_footer = "++GITWEB_SITE_FOOTER++";
 112
 113 # URI of stylesheets
 114 our @stylesheets = ("++GITWEB_CSS++");
 115 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 116 our $stylesheet = undef;
 117 # URI of GIT logo (72x27 size)
 118 our $logo = "++GITWEB_LOGO++";
 119 # URI of GIT favicon, assumed to be image/png type
 120 our $favicon = "++GITWEB_FAVICON++";
 121 # URI of gitweb.js (JavaScript code for gitweb)
 122 our $javascript = "++GITWEB_JS++";
 123
 124 # URI and label (title) of GIT logo link
 125 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 126 #our $logo_label = "git documentation";
 127 our $logo_url = "http://git-scm.com/";
 128 our $logo_label = "git homepage";
 129
 130 # source of projects list
 131 our $projects_list = "++GITWEB_LIST++";
 132
 133 # the width (in characters) of the projects list "Description" column
 134 our $projects_list_description_width = 25;
 135
 136 # group projects by category on the projects list
 137 # (enabled if this variable evaluates to true)
 138 our $projects_list_group_categories = 0;
 139
 140 # default category if none specified
 141 # (leave the empty string for no category)
 142 our $project_list_default_category = "";
 143
 144 # default order of projects list
 145 # valid values are none, project, descr, owner, and age
 146 our $default_projects_order = "project";
 147
 148 # default order of refs list
 149 # valid values are age and name
 150 our $default_refs_order = "age";
 151
 152 # show repository only if this file exists
 153 # (only effective if this variable evaluates to true)
 154 our $export_ok = "++GITWEB_EXPORT_OK++";
 155
 156 # don't generate age column on the projects list page
 157 our $omit_age_column = 0;
 158
 159 # use contents of this file (in iso, iso-strict or raw format) as
 160 # the last activity data if it exists and is a valid date
 161 our $lastactivity_file = undef;
 162
 163 # don't generate information about owners of repositories
 164 our $omit_owner=0;
 165
 166 # owner link hook given owner name (full and NOT obfuscated)
 167 # should return full URL-escaped link to attach to owner, for example:
 168 #    sub { return "/showowner.cgi?owner=".CGI::Util::escape($_[0]); }
 169 our $owner_link_hook = undef;
 170
 171 # show repository only if this subroutine returns true
 172 # when given the path to the project, for example:
 173 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 174 our $export_auth_hook = undef;
 175
 176 # only allow viewing of repositories also shown on the overview page
 177 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 178
 179 # base URL for bundle info link shown on summary page, but only if
 180 # this config item is defined AND a 'bundles' subdirectory exists
 181 # in the project's repository.
 182 # i.e. full URL is "git_base_bundles_url/$project/bundles"
 183 our $git_base_bundles_url = undef;
 184
 185 ## URL Hints
 186 ##
 187 ## Any of the urls in @git_base_url_list, @git_base_mirror_urls or
 188 ## @git_base_push_urls may be an array ref instead of a scalar in which
 189 ## case ${}[0] is the url and ${}[1] is an html fragment "hint" to display
 190 ## right after the URL.
 191
 192 # list of git base URLs used for URL to where fetch project from,
 193 # i.e. full URL is "$git_base_url/$project"
 194 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 195
 196 ## For push projects (a .nofetch file exists OR gitweb.showpush is true)
 197 ## @git_base_url_list entries are shown as "URL" and @git_base_push_urls
 198 ## are shown as "push URL" and @git_base_mirror_urls are ignored.
 199 ## For non-push projects, @git_base_url_list and @git_base_mirror_urls are shown
 200 ## as "URL" and @git_base_push_urls are ignored.
 201
 202 # URLs shown for mirrors but not for push projects in addition to base_url_list,
 203 # extended by the project name (i.e. full URL is "$git_mirror_url/$project")
 204 our @git_base_mirror_urls = ();
 205
 206 # URLs designated for pushing new changes, extended by the
 207 # project name (i.e. "$git_base_push_url[0]/$project")
 208 our @git_base_push_urls = ();
 209
 210 # https hint html inserted right after any https push URL (undef for none)
 211 # ignored if the url already has its own hint
 212 # this is supported for backwards compatibility but is now deprecated in favor
 213 # of using an array ref in the @git_base_push_urls list instead
 214 our $https_hint_html = undef;
 215
 216 # default blob_plain mimetype and default charset for text/plain blob
 217 our $default_blob_plain_mimetype = 'application/octet-stream';
 218 our $default_text_plain_charset  = undef;
 219
 220 # file to use for guessing MIME types before trying /etc/mime.types
 221 # (relative to the current git repository)
 222 our $mimetypes_file = undef;
 223
 224 # assume this charset if line contains non-UTF-8 characters;
 225 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 226 # for which encoding all byte sequences are valid, for example
 227 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 228 # could be even 'utf-8' for the old behavior)
 229 our $fallback_encoding = 'latin1';
 230
 231 # rename detection options for git-diff and git-diff-tree
 232 # - default is '-M', with the cost proportional to
 233 #   (number of removed files) * (number of new files).
 234 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 235 #   (number of changed files + number of removed files) * (number of new files)
 236 # - even more costly is '-C', '--find-copies-harder' with cost
 237 #   (number of files in the original tree) * (number of new files)
 238 # - one might want to include '-B' option, e.g. '-B', '-M'
 239 our @diff_opts = ('-M'); # taken from git_commit
 240
 241 # cache directory (relative to $GIT_DIR) for project-specific html page caches.
 242 # the directory must exist and be writable by the process running gitweb.
 243 # additionally some actions must be selected for caching in %html_cache_actions
 244 # - default is 'htmlcache'
 245 our $html_cache_dir = 'htmlcache';
 246
 247 # which actions to cache in $html_cache_dir
 248 # if $html_cache_dir exists (relative to $GIT_DIR) and is writable by the
 249 # process running gitweb, then any actions selected here will have their output
 250 # cached and the cache file will be returned instead of regenerating the page
 251 # if it exists.  For this to be useful, an external process must create the
 252 # 'changed' file (if it does not already exist) in the $html_cache_dir whenever
 253 # the project information has been changed.  Alternatively it may create a
 254 # "$action.changed" file (if it does not exist) instead to limit the changes
 255 # to just "$action" instead of any action.  If 'changed' or "$action.changed"
 256 # exist, then the cached version will never be used for "$action" and a new
 257 # cache page will be regenerated (and the "changed" files removed as appropriate).
 258 #
 259 # Additionally if $projlist_cache_lifetime is > 0 AND the forks feature has been
 260 # enabled ('$feature{'forks'}{'default'} = [1];') then additionally an external
 261 # process must create the 'forkchange' file or update its timestamp if it already
 262 # exists whenever a fork is added to or removed from the project (as well as
 263 # create the 'changed' or "$action.changed" file).  Otherwise the "forks"
 264 # section on the summary page may remain out-of-date indefinately.
 265 #
 266 # - default is none
 267 #   currently only caching of the summary page is supported
 268 # - to enable caching of the summary page use:
 269 #   $html_cache_actions{'summary'} = 1;
 270 our %html_cache_actions = ();
 271
 272 # utility to automatically produce a default README.html if README.html is
 273 # enabled and it does not exist or is 0 bytes in length.  If this is set to an
 274 # executable utility that takes an absolute path to a .git directory as its
 275 # first argument and outputs an HTML fragment to use for README.html, then
 276 # it will be called when README.html is enabled but empty or missing.
 277 our $git_automatic_readme_html = undef;
 278
 279 # Disables features that would allow repository owners to inject script into
 280 # the gitweb domain.
 281 our $prevent_xss = 0;
 282
 283 # Path to a POSIX shell.  Needed to run $highlight_bin and a snapshot compressor.
 284 # Only used when highlight is enabled or snapshots with compressors are enabled.
 285 our $posix_shell_bin = "++POSIX_SHELL_BIN++";
 286
 287 # Path to the highlight executable to use (must be the one from
 288 # http://www.andre-simon.de due to assumptions about parameters and output).
 289 # Useful if highlight is not installed on your webserver's PATH.
 290 # [Default: highlight]
 291 our $highlight_bin = "++HIGHLIGHT_BIN++";
 292
 293 # Whether to include project list on the gitweb front page; 0 means yes,
 294 # 1 means no list but show tag cloud if enabled (all projects still need
 295 # to be scanned, unless the info is cached), 2 means no list and no tag cloud
 296 # (very fast)
 297 our $frontpage_no_project_list = 0;
 298
 299 # projects list cache for busy sites with many projects;
 300 # if you set this to non-zero, it will be used as the cached
 301 # index lifetime in minutes
 302 #
 303 # the cached list version is stored in $cache_dir/$cache_name and can
 304 # be tweaked by other scripts running with the same uid as gitweb -
 305 # use this ONLY at secure installations; only single gitweb project
 306 # root per system is supported, unless you tweak configuration!
 307 our $projlist_cache_lifetime = 0; # in minutes
 308 # FHS compliant $cache_dir would be "/var/cache/gitweb"
 309 our $cache_dir =
 310         (defined $ENV{'TMPDIR'} ? $ENV{'TMPDIR'} : '/tmp').'/gitweb';
 311 our $projlist_cache_name = 'gitweb.index.cache';
 312 our $cache_grpshared = 0;
 313
 314 # information about snapshot formats that gitweb is capable of serving
 315 our %known_snapshot_formats = (
 316         # name => {
 317         #       'display' => display name,
 318         #       'type' => mime type,
 319         #       'suffix' => filename suffix,
 320         #       'format' => --format for git-archive,
 321         #       'compressor' => [compressor command and arguments]
 322         #                       (array reference, optional)
 323         #       'disabled' => boolean (optional)}
 324         #
 325         'tgz' => {
 326                 'display' => 'tar.gz',
 327                 'type' => 'application/x-gzip',
 328                 'suffix' => '.tar.gz',
 329                 'format' => 'tar',
 330                 'compressor' => ['gzip', '-n']},
 331
 332         'tbz2' => {
 333                 'display' => 'tar.bz2',
 334                 'type' => 'application/x-bzip2',
 335                 'suffix' => '.tar.bz2',
 336                 'format' => 'tar',
 337                 'compressor' => ['bzip2']},
 338
 339         'txz' => {
 340                 'display' => 'tar.xz',
 341                 'type' => 'application/x-xz',
 342                 'suffix' => '.tar.xz',
 343                 'format' => 'tar',
 344                 'compressor' => ['xz'],
 345                 'disabled' => 1},
 346
 347         'zip' => {
 348                 'display' => 'zip',
 349                 'type' => 'application/x-zip',
 350                 'suffix' => '.zip',
 351                 'format' => 'zip'},
 352 );
 353
 354 # Aliases so we understand old gitweb.snapshot values in repository
 355 # configuration.
 356 our %known_snapshot_format_aliases = (
 357         'gzip'  => 'tgz',
 358         'bzip2' => 'tbz2',
 359         'xz'    => 'txz',
 360
 361         # backward compatibility: legacy gitweb config support
 362         'x-gzip' => undef, 'gz' => undef,
 363         'x-bzip2' => undef, 'bz2' => undef,
 364         'x-zip' => undef, '' => undef,
 365 );
 366
 367 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 368 # are changed, it may be appropriate to change these values too via
 369 # $GITWEB_CONFIG.
 370 our %avatar_size = (
 371         'default' => 16,
 372         'double'  => 32
 373 );
 374
 375 # Used to set the maximum load that we will still respond to gitweb queries.
 376 # If server load exceed this value then return "503 server busy" error.
 377 # If gitweb cannot determined server load, it is taken to be 0.
 378 # Leave it undefined (or set to 'undef') to turn off load checking.
 379 our $maxload = 300;
 380
 381 # configuration for 'highlight' (http://www.andre-simon.de/)
 382 # match by basename
 383 our %highlight_basename = (
 384         #'Program' => 'py',
 385         #'Library' => 'py',
 386         'SConstruct' => 'py', # SCons equivalent of Makefile
 387         'Makefile' => 'make',
 388         'makefile' => 'make',
 389         'GNUmakefile' => 'make',
 390         'BSDmakefile' => 'make',
 391 );
 392 # match by shebang regex
 393 our %highlight_shebang = (
 394         # Each entry has a key which is the syntax to use and
 395         # a value which is either a qr regex or an array of qr regexs to match
 396         # against the first 128 (less if the blob is shorter) BYTES of the blob.
 397         # We match /usr/bin/env items separately to require "/usr/bin/env" and
 398         # allow a limited subset of NAME=value items to appear.
 399         'awk'    => [ qr,^#!\s*/(?:\w+/)*(?:[gnm]?awk)(?:\s|$),mo,
 400                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:[gnm]?awk)(?:\s|$),mo ],
 401         'make'   => [ qr,^#!\s*/(?:\w+/)*(?:g?make)(?:\s|$),mo,
 402                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:g?make)(?:\s|$),mo ],
 403         'php'    => [ qr,^#!\s*/(?:\w+/)*(?:php)(?:\s|$),mo,
 404                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:php)(?:\s|$),mo ],
 405         'pl'     => [ qr,^#!\s*/(?:\w+/)*(?:perl)(?:\s|$),mo,
 406                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:perl)(?:\s|$),mo ],
 407         'py'     => [ qr,^#!\s*/(?:\w+/)*(?:python)(?:\s|$),mo,
 408                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:python)(?:\s|$),mo ],
 409         'sh'     => [ qr,^#!\s*/(?:\w+/)*(?:[bd]ash|t?csh|[akz]?sh)(?:\s|$),mo,
 410                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:[bd]ash|t?csh|[akz]?sh)(?:\s|$),mo ],
 411         'rb'     => [ qr,^#!\s*/(?:\w+/)*(?:ruby)(?:\s|$),mo,
 412                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:ruby)(?:\s|$),mo ],
 413 );
 414 # match by extension
 415 our %highlight_ext = (
 416         # main extensions, defining name of syntax;
 417         # see files in /usr/share/highlight/langDefs/ directory
 418         (map { $_ => $_ } qw(
 419                 4gl a4c abnf abp ada agda ahk ampl amtrix applescript arc
 420                 arm as asm asp aspect ats au3 avenue awk bat bb bbcode bib
 421                 bms bnf boo c cb cfc chl clipper clojure clp cob cs css d
 422                 diff dot dylan e ebnf erl euphoria exp f90 flx for frink fs
 423                 go haskell hcl html httpd hx icl icn idl idlang ili
 424                 inc_luatex ini inp io iss j java js jsp lbn ldif lgt lhs
 425                 lisp lotos ls lsl lua ly make mel mercury mib miranda ml mo
 426                 mod2 mod3 mpl ms mssql n nas nbc nice nrx nsi nut nxc oberon
 427                 objc octave oorexx os oz pas php pike pl pl1 pov pro
 428                 progress ps ps1 psl pure py pyx q qmake qu r rb rebol rexx
 429                 rnc s sas sc scala scilab sh sma smalltalk sml sno spec spn
 430                 sql sybase tcl tcsh tex ttcn3 vala vb verilog vhd xml xpp y
 431                 yaiff znn)),
 432         # alternate extensions, see /etc/highlight/filetypes.conf
 433         (map { $_ => '4gl' } qw(informix)),
 434         (map { $_ => 'a4c' } qw(ascend)),
 435         (map { $_ => 'abp' } qw(abp4)),
 436         (map { $_ => 'ada' } qw(a adb ads gnad)),
 437         (map { $_ => 'ahk' } qw(autohotkey)),
 438         (map { $_ => 'ampl' } qw(dat run)),
 439         (map { $_ => 'amtrix' } qw(hnd s4 s4h s4t t4)),
 440         (map { $_ => 'as' } qw(actionscript)),
 441         (map { $_ => 'asm' } qw(29k 68s 68x a51 assembler x68 x86)),
 442         (map { $_ => 'asp' } qw(asa)),
 443         (map { $_ => 'aspect' } qw(was wud)),
 444         (map { $_ => 'ats' } qw(dats)),
 445         (map { $_ => 'au3' } qw(autoit)),
 446         (map { $_ => 'bat' } qw(cmd)),
 447         (map { $_ => 'bb' } qw(blitzbasic)),
 448         (map { $_ => 'bib' } qw(bibtex)),
 449         (map { $_ => 'c' } qw(c++ cc cpp cu cxx h hh hpp hxx)),
 450         (map { $_ => 'cb' } qw(clearbasic)),
 451         (map { $_ => 'cfc' } qw(cfm coldfusion)),
 452         (map { $_ => 'chl' } qw(chill)),
 453         (map { $_ => 'cob' } qw(cbl cobol)),
 454         (map { $_ => 'cs' } qw(csharp)),
 455         (map { $_ => 'diff' } qw(patch)),
 456         (map { $_ => 'dot' } qw(graphviz)),
 457         (map { $_ => 'e' } qw(eiffel se)),
 458         (map { $_ => 'erl' } qw(erlang hrl)),
 459         (map { $_ => 'euphoria' } qw(eu ew ex exu exw wxu)),
 460         (map { $_ => 'exp' } qw(express)),
 461         (map { $_ => 'f90' } qw(f95)),
 462         (map { $_ => 'flx' } qw(felix)),
 463         (map { $_ => 'for' } qw(f f77 ftn)),
 464         (map { $_ => 'fs' } qw(fsharp fsx)),
 465         (map { $_ => 'haskell' } qw(hs)),
 466         (map { $_ => 'html' } qw(htm xhtml)),
 467         (map { $_ => 'hx' } qw(haxe)),
 468         (map { $_ => 'icl' } qw(clean)),
 469         (map { $_ => 'icn' } qw(icon)),
 470         (map { $_ => 'ili' } qw(interlis)),
 471         (map { $_ => 'inp' } qw(fame)),
 472         (map { $_ => 'iss' } qw(innosetup)),
 473         (map { $_ => 'j' } qw(jasmin)),
 474         (map { $_ => 'java' } qw(groovy grv)),
 475         (map { $_ => 'lbn' } qw(luban)),
 476         (map { $_ => 'lgt' } qw(logtalk)),
 477         (map { $_ => 'lisp' } qw(cl clisp el lsp sbcl scom)),
 478         (map { $_ => 'ls' } qw(lotus)),
 479         (map { $_ => 'lsl' } qw(lindenscript)),
 480         (map { $_ => 'ly' } qw(lilypond)),
 481         (map { $_ => 'make' } qw(mak mk kmk)),
 482         (map { $_ => 'mel' } qw(maya)),
 483         (map { $_ => 'mib' } qw(smi snmp)),
 484         (map { $_ => 'ml' } qw(mli ocaml)),
 485         (map { $_ => 'mo' } qw(modelica)),
 486         (map { $_ => 'mod2' } qw(def mod)),
 487         (map { $_ => 'mod3' } qw(i3 m3)),
 488         (map { $_ => 'mpl' } qw(maple)),
 489         (map { $_ => 'n' } qw(nemerle)),
 490         (map { $_ => 'nas' } qw(nasal)),
 491         (map { $_ => 'nrx' } qw(netrexx)),
 492         (map { $_ => 'nsi' } qw(nsis)),
 493         (map { $_ => 'nut' } qw(squirrel)),
 494         (map { $_ => 'oberon' } qw(ooc)),
 495         (map { $_ => 'objc' } qw(M m mm)),
 496         (map { $_ => 'php' } qw(php3 php4 php5 php6)),
 497         (map { $_ => 'pike' } qw(pmod)),
 498         (map { $_ => 'pl' } qw(perl plex plx pm)),
 499         (map { $_ => 'pl1' } qw(bdy ff fp fpp rpp sf sp spb spe spp sps wf wp wpb wpp wps)),
 500         (map { $_ => 'progress' } qw(i p w)),
 501         (map { $_ => 'py' } qw(python)),
 502         (map { $_ => 'pyx' } qw(pyrex)),
 503         (map { $_ => 'rb' } qw(pp rjs ruby)),
 504         (map { $_ => 'rexx' } qw(rex rx the)),
 505         (map { $_ => 'sc' } qw(paradox)),
 506         (map { $_ => 'scilab' } qw(sce sci)),
 507         (map { $_ => 'sh' } qw(bash ebuild eclass ksh zsh)),
 508         (map { $_ => 'sma' } qw(small)),
 509         (map { $_ => 'smalltalk' } qw(gst sq st)),
 510         (map { $_ => 'sno' } qw(snobal)),
 511         (map { $_ => 'sybase' } qw(sp)),
 512         (map { $_ => 'tcl' } qw(itcl wish)),
 513         (map { $_ => 'tex' } qw(cls sty)),
 514         (map { $_ => 'vb' } qw(bas basic bi vbs)),
 515         (map { $_ => 'verilog' } qw(v)),
 516         (map { $_ => 'xml' } qw(dtd ecf ent hdr hub jnlp nrm plist resx sgm sgml svg tld vxml wml xsd xsl)),
 517         (map { $_ => 'y' } qw(bison)),
 518 );
 519
 520 # You define site-wide feature defaults here; override them with
 521 # $GITWEB_CONFIG as necessary.
 522 our %feature = (
 523         # feature => {
 524         #       'sub' => feature-sub (subroutine),
 525         #       'override' => allow-override (boolean),
 526         #       'default' => [ default options...] (array reference)}
 527         #
 528         # if feature is overridable (it means that allow-override has true value),
 529         # then feature-sub will be called with default options as parameters;
 530         # return value of feature-sub indicates if to enable specified feature
 531         #
 532         # if there is no 'sub' key (no feature-sub), then feature cannot be
 533         # overridden
 534         #
 535         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 536         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 537         # is enabled
 538
 539         # Enable the 'blame' blob view, showing the last commit that modified
 540         # each line in the file. This can be very CPU-intensive.
 541
 542         # To enable system wide have in $GITWEB_CONFIG
 543         # $feature{'blame'}{'default'} = [1];
 544         # To have project specific config enable override in $GITWEB_CONFIG
 545         # $feature{'blame'}{'override'} = 1;
 546         # and in project config gitweb.blame = 0|1;
 547         'blame' => {
 548                 'sub' => sub { feature_bool('blame', @_) },
 549                 'override' => 0,
 550                 'default' => [0]},
 551
 552         # Enable the 'incremental blame' blob view, which uses javascript to
 553         # incrementally show the revisions of lines as they are discovered
 554         # in the history. It is better for large histories, files and slow
 555         # servers, but requires javascript in the client and can slow down the
 556         # browser on large files.
 557
 558         # To enable system wide have in $GITWEB_CONFIG
 559         # $feature{'blame_incremental'}{'default'} = [1];
 560         # To have project specific config enable override in $GITWEB_CONFIG
 561         # $feature{'blame_incremental'}{'override'} = 1;
 562         # and in project config gitweb.blame_incremental = 0|1;
 563         'blame_incremental' => {
 564                 'sub' => sub { feature_bool('blame_incremental', @_) },
 565                 'override' => 0,
 566                 'default' => [0]},
 567
 568         # Enable the 'snapshot' link, providing a compressed archive of any
 569         # tree. This can potentially generate high traffic if you have large
 570         # project.
 571
 572         # Value is a list of formats defined in %known_snapshot_formats that
 573         # you wish to offer.
 574         # To disable system wide have in $GITWEB_CONFIG
 575         # $feature{'snapshot'}{'default'} = [];
 576         # To have project specific config enable override in $GITWEB_CONFIG
 577         # $feature{'snapshot'}{'override'} = 1;
 578         # and in project config, a comma-separated list of formats or "none"
 579         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 580         'snapshot' => {
 581                 'sub' => \&feature_snapshot,
 582                 'override' => 0,
 583                 'default' => ['tgz']},
 584
 585         # Enable text search, which will list the commits which match author,
 586         # committer or commit text to a given string.  Enabled by default.
 587         # Project specific override is not supported.
 588         #
 589         # Note that this controls all search features, which means that if
 590         # it is disabled, then 'grep' and 'pickaxe' search would also be
 591         # disabled.
 592         'search' => {
 593                 'override' => 0,
 594                 'default' => [1]},
 595
 596         # Enable regular expression search.  Enabled by default.
 597         # Note that you need to have 'search' feature enabled too.
 598         #
 599         # Note that this affects all git search features, which means that if
 600         # it is disabled, none of the git search options will allow a regular
 601         # expression (the "RE" checkbox) to be used.  However, the project
 602         # list search is unaffected by this setting (it uses Perl to do the
 603         # matching not Git) and will always allow a regular expression to
 604         # be used (by checking the box) regardless of this setting.
 605         'regexp' => {
 606                 'sub' => sub { feature_bool('regexp', @_) },
 607                 'override' => 0,
 608                 'default' => [1]},
 609
 610         # Enable grep search, which will list the files in currently selected
 611         # tree containing the given string. Enabled by default. This can be
 612         # potentially CPU-intensive, of course.
 613         # Note that you need to have 'search' feature enabled too.
 614
 615         # To enable system wide have in $GITWEB_CONFIG
 616         # $feature{'grep'}{'default'} = [1];
 617         # To have project specific config enable override in $GITWEB_CONFIG
 618         # $feature{'grep'}{'override'} = 1;
 619         # and in project config gitweb.grep = 0|1;
 620         'grep' => {
 621                 'sub' => sub { feature_bool('grep', @_) },
 622                 'override' => 0,
 623                 'default' => [1]},
 624
 625         # Enable the pickaxe search, which will list the commits that modified
 626         # a given string in a file. This can be practical and quite faster
 627         # alternative to 'blame', but still potentially CPU-intensive.
 628         # Note that you need to have 'search' feature enabled too.
 629
 630         # To enable system wide have in $GITWEB_CONFIG
 631         # $feature{'pickaxe'}{'default'} = [1];
 632         # To have project specific config enable override in $GITWEB_CONFIG
 633         # $feature{'pickaxe'}{'override'} = 1;
 634         # and in project config gitweb.pickaxe = 0|1;
 635         'pickaxe' => {
 636                 'sub' => sub { feature_bool('pickaxe', @_) },
 637                 'override' => 0,
 638                 'default' => [1]},
 639
 640         # Enable showing size of blobs in a 'tree' view, in a separate
 641         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 642
 643         # To disable system wide have in $GITWEB_CONFIG
 644         # $feature{'show-sizes'}{'default'} = [0];
 645         # To have project specific config enable override in $GITWEB_CONFIG
 646         # $feature{'show-sizes'}{'override'} = 1;
 647         # and in project config gitweb.showsizes = 0|1;
 648         'show-sizes' => {
 649                 'sub' => sub { feature_bool('showsizes', @_) },
 650                 'override' => 0,
 651                 'default' => [1]},
 652
 653         # Make gitweb use an alternative format of the URLs which can be
 654         # more readable and natural-looking: project name is embedded
 655         # directly in the path and the query string contains other
 656         # auxiliary information. All gitweb installations recognize
 657         # URL in either format; this configures in which formats gitweb
 658         # generates links.
 659
 660         # To enable system wide have in $GITWEB_CONFIG
 661         # $feature{'pathinfo'}{'default'} = [1];
 662         # Project specific override is not supported.
 663
 664         # Note that you will need to change the default location of CSS,
 665         # favicon, logo and possibly other files to an absolute URL. Also,
 666         # if gitweb.cgi serves as your indexfile, you will need to force
 667         # $my_uri to contain the script name in your $GITWEB_CONFIG (and you
 668         # will also likely want to set $home_link if you're setting $my_uri).
 669         'pathinfo' => {
 670                 'override' => 0,
 671                 'default' => [0]},
 672
 673         # Make gitweb consider projects in project root subdirectories
 674         # to be forks of existing projects. Given project $projname.git,
 675         # projects matching $projname/*.git will not be shown in the main
 676         # projects list, instead a '+' mark will be added to $projname
 677         # there and a 'forks' view will be enabled for the project, listing
 678         # all the forks. If project list is taken from a file, forks have
 679         # to be listed after the main project.
 680
 681         # To enable system wide have in $GITWEB_CONFIG
 682         # $feature{'forks'}{'default'} = [1];
 683         # Project specific override is not supported.
 684         'forks' => {
 685                 'override' => 0,
 686                 'default' => [0]},
 687
 688         # Insert custom links to the action bar of all project pages.
 689         # This enables you mainly to link to third-party scripts integrating
 690         # into gitweb; e.g. git-browser for graphical history representation
 691         # or custom web-based repository administration interface.
 692
 693         # The 'default' value consists of a list of triplets in the form
 694         # (label, link, position) where position is the label after which
 695         # to insert the link and link is a format string where %n expands
 696         # to the project name, %f to the project path within the filesystem,
 697         # %h to the current hash (h gitweb parameter) and %b to the current
 698         # hash base (hb gitweb parameter); %% expands to %.  %e expands to the
 699         # project name where all '+' characters have been replaced with '%2B'.
 700
 701         # To enable system wide have in $GITWEB_CONFIG e.g.
 702         # $feature{'actions'}{'default'} = [('graphiclog',
 703         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 704         # Project specific override is not supported.
 705         'actions' => {
 706                 'override' => 0,
 707                 'default' => []},
 708
 709         # Allow gitweb scan project content tags of project repository,
 710         # and display the popular Web 2.0-ish "tag cloud" near the projects
 711         # list.  Note that this is something COMPLETELY different from the
 712         # normal Git tags.
 713
 714         # gitweb by itself can show existing tags, but it does not handle
 715         # tagging itself; you need to do it externally, outside gitweb.
 716         # The format is described in git_get_project_ctags() subroutine.
 717         # You may want to install the HTML::TagCloud Perl module to get
 718         # a pretty tag cloud instead of just a list of tags.
 719
 720         # To enable system wide have in $GITWEB_CONFIG
 721         # $feature{'ctags'}{'default'} = [1];
 722         # Project specific override is not supported.
 723
 724         # A value of 0 means no ctags display or editing.  A value of
 725         # 1 enables ctags display but never editing.  A non-empty value
 726         # that is not a string of digits enables ctags display AND the
 727         # ability to add tags using a form that uses method POST and
 728         # an action value set to the configured 'ctags' value.
 729         'ctags' => {
 730                 'override' => 0,
 731                 'default' => [0]},
 732
 733         # The maximum number of patches in a patchset generated in patch
 734         # view. Set this to 0 or undef to disable patch view, or to a
 735         # negative number to remove any limit.
 736
 737         # To disable system wide have in $GITWEB_CONFIG
 738         # $feature{'patches'}{'default'} = [0];
 739         # To have project specific config enable override in $GITWEB_CONFIG
 740         # $feature{'patches'}{'override'} = 1;
 741         # and in project config gitweb.patches = 0|n;
 742         # where n is the maximum number of patches allowed in a patchset.
 743         'patches' => {
 744                 'sub' => \&feature_patches,
 745                 'override' => 0,
 746                 'default' => [16]},
 747
 748         # Avatar support. When this feature is enabled, views such as
 749         # shortlog or commit will display an avatar associated with
 750         # the email of the committer(s) and/or author(s).
 751
 752         # Currently available providers are gravatar and picon.
 753         # If an unknown provider is specified, the feature is disabled.
 754
 755         # Gravatar depends on Digest::MD5.
 756         # Picon currently relies on the indiana.edu database.
 757
 758         # To enable system wide have in $GITWEB_CONFIG
 759         # $feature{'avatar'}{'default'} = ['<provider>'];
 760         # where <provider> is either gravatar or picon.
 761         # To have project specific config enable override in $GITWEB_CONFIG
 762         # $feature{'avatar'}{'override'} = 1;
 763         # and in project config gitweb.avatar = <provider>;
 764         'avatar' => {
 765                 'sub' => \&feature_avatar,
 766                 'override' => 0,
 767                 'default' => ['']},
 768
 769         # Enable displaying how much time and how many git commands
 770         # it took to generate and display page.  Disabled by default.
 771         # Project specific override is not supported.
 772         'timed' => {
 773                 'override' => 0,
 774                 'default' => [0]},
 775
 776         # Enable turning some links into links to actions which require
 777         # JavaScript to run (like 'blame_incremental').  Not enabled by
 778         # default.  Project specific override is currently not supported.
 779         'javascript-actions' => {
 780                 'override' => 0,
 781                 'default' => [0]},
 782
 783         # Enable and configure ability to change common timezone for dates
 784         # in gitweb output via JavaScript.  Enabled by default.
 785         # Project specific override is not supported.
 786         'javascript-timezone' => {
 787                 'override' => 0,
 788                 'default' => [
 789                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 790                                      # or undef to turn off this feature
 791                         'gitweb_tz', # name of cookie where to store selected timezone
 792                         'datetime',  # CSS class used to mark up dates for manipulation
 793                 ]},
 794
 795         # Syntax highlighting support. This is based on Daniel Svensson's
 796         # and Sham Chukoury's work in gitweb-xmms2.git.
 797         # It requires the 'highlight' program present in $PATH,
 798         # and therefore is disabled by default.
 799
 800         # To enable system wide have in $GITWEB_CONFIG
 801         # $feature{'highlight'}{'default'} = [1];
 802
 803         'highlight' => {
 804                 'sub' => sub { feature_bool('highlight', @_) },
 805                 'override' => 0,
 806                 'default' => [0]},
 807
 808         # Enable displaying of remote heads in the heads list
 809
 810         # To enable system wide have in $GITWEB_CONFIG
 811         # $feature{'remote_heads'}{'default'} = [1];
 812         # To have project specific config enable override in $GITWEB_CONFIG
 813         # $feature{'remote_heads'}{'override'} = 1;
 814         # and in project config gitweb.remoteheads = 0|1;
 815         'remote_heads' => {
 816                 'sub' => sub { feature_bool('remote_heads', @_) },
 817                 'override' => 0,
 818                 'default' => [0]},
 819
 820         # Enable showing branches under other refs in addition to heads
 821
 822         # To set system wide extra branch refs have in $GITWEB_CONFIG
 823         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 824         # To have project specific config enable override in $GITWEB_CONFIG
 825         # $feature{'extra-branch-refs'}{'override'} = 1;
 826         # and in project config gitweb.extrabranchrefs = dirs of choice
 827         # Every directory is separated with whitespace.
 828
 829         'extra-branch-refs' => {
 830                 'sub' => \&feature_extra_branch_refs,
 831                 'override' => 0,
 832                 'default' => []},
 833 );
 834
 835 sub gitweb_get_feature {
 836         my ($name) = @_;
 837         return unless exists $feature{$name};
 838         my ($sub, $override, @defaults) = (
 839                 $feature{$name}{'sub'},
 840                 $feature{$name}{'override'},
 841                 @{$feature{$name}{'default'}});
 842         # project specific override is possible only if we have project
 843         our $git_dir; # global variable, declared later
 844         if (!$override || !defined $git_dir) {
 845                 return @defaults;
 846         }
 847         if (!defined $sub) {
 848                 warn "feature $name is not overridable";
 849                 return @defaults;
 850         }
 851         return $sub->(@defaults);
 852 }
 853
 854 # A wrapper to check if a given feature is enabled.
 855 # With this, you can say
 856 #
 857 #   my $bool_feat = gitweb_check_feature('bool_feat');
 858 #   gitweb_check_feature('bool_feat') or somecode;
 859 #
 860 # instead of
 861 #
 862 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 863 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 864 #
 865 sub gitweb_check_feature {
 866         return (gitweb_get_feature(@_))[0];
 867 }
 868
 869
 870 sub feature_bool {
 871         my $key = shift;
 872         my ($val) = git_get_project_config($key, '--bool');
 873
 874         if (!defined $val) {
 875                 return ($_[0]);
 876         } elsif ($val eq 'true') {
 877                 return (1);
 878         } elsif ($val eq 'false') {
 879                 return (0);
 880         }
 881 }
 882
 883 sub feature_snapshot {
 884         my (@fmts) = @_;
 885
 886         my ($val) = git_get_project_config('snapshot');
 887
 888         if ($val) {
 889                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 890         }
 891
 892         return @fmts;
 893 }
 894
 895 sub feature_patches {
 896         my @val = (git_get_project_config('patches', '--int'));
 897
 898         if (@val) {
 899                 return @val;
 900         }
 901
 902         return ($_[0]);
 903 }
 904
 905 sub feature_avatar {
 906         my @val = (git_get_project_config('avatar'));
 907
 908         return @val ? @val : @_;
 909 }
 910
 911 sub feature_extra_branch_refs {
 912         my (@branch_refs) = @_;
 913         my $values = git_get_project_config('extrabranchrefs');
 914
 915         if ($values) {
 916                 $values = config_to_multi ($values);
 917                 @branch_refs = ();
 918                 foreach my $value (@{$values}) {
 919                         push @branch_refs, split /\s+/, $value;
 920                 }
 921         }
 922
 923         return @branch_refs;
 924 }
 925
 926 # checking HEAD file with -e is fragile if the repository was
 927 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 928 # and then pruned.
 929 sub check_head_link {
 930         my ($dir) = @_;
 931         return 0 unless -d "$dir/objects" && -x _;
 932         return 0 unless -d "$dir/refs" && -x _;
 933         my $headfile = "$dir/HEAD";
 934         return -l $headfile ?
 935                 readlink($headfile) =~ /^refs\/heads\// : -f $headfile;
 936 }
 937
 938 sub check_export_ok {
 939         my ($dir) = @_;
 940         return (check_head_link($dir) &&
 941                 (!$export_ok || -e "$dir/$export_ok") &&
 942                 (!$export_auth_hook || $export_auth_hook->($dir)));
 943 }
 944
 945 # process alternate names for backward compatibility
 946 # filter out unsupported (unknown) snapshot formats
 947 sub filter_snapshot_fmts {
 948         my @fmts = @_;
 949
 950         @fmts = map {
 951                 exists $known_snapshot_format_aliases{$_} ?
 952                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 953         @fmts = grep {
 954                 exists $known_snapshot_formats{$_} &&
 955                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 956 }
 957
 958 sub filter_and_validate_refs {
 959         my @refs = @_;
 960         my %unique_refs = ();
 961
 962         foreach my $ref (@refs) {
 963                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 964                 # 'heads' are added implicitly in get_branch_refs().
 965                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 966         }
 967         return sort keys %unique_refs;
 968 }
 969
 970 # If it is set to code reference, it is code that it is to be run once per
 971 # request, allowing updating configurations that change with each request,
 972 # while running other code in config file only once.
 973 #
 974 # Otherwise, if it is false then gitweb would process config file only once;
 975 # if it is true then gitweb config would be run for each request.
 976 our $per_request_config = 1;
 977
 978 # If true and fileno STDIN is 0 and getsockname succeeds and getpeername fails
 979 # with ENOTCONN, then FCGI mode will be activated automatically in just the
 980 # same way as though the --fcgi option had been given instead.
 981 our $auto_fcgi = 0;
 982
 983 # read and parse gitweb config file given by its parameter.
 984 # returns true on success, false on recoverable error, allowing
 985 # to chain this subroutine, using first file that exists.
 986 # dies on errors during parsing config file, as it is unrecoverable.
 987 sub read_config_file {
 988         my $filename = shift;
 989         return unless defined $filename;
 990         # die if there are errors parsing config file
 991         if (-e $filename) {
 992                 do $filename;
 993                 die $@ if $@;
 994                 return 1;
 995         }
 996         return;
 997 }
 998
 999 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
1000 sub evaluate_gitweb_config {
1001         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
1002         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
1003         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
1004
1005         # Protect against duplications of file names, to not read config twice.
1006         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
1007         # there possibility of duplication of filename there doesn't matter.
1008         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
1009         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
1010
1011         # Common system-wide settings for convenience.
1012         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
1013         read_config_file($GITWEB_CONFIG_COMMON);
1014
1015         # Use first config file that exists.  This means use the per-instance
1016         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
1017         read_config_file($GITWEB_CONFIG) and return;
1018         read_config_file($GITWEB_CONFIG_SYSTEM);
1019 }
1020
1021 our $encode_object;
1022 our $to_utf8_pipe_command = '';
1023
1024 sub evaluate_encoding {
1025         my $requested = $fallback_encoding || 'ISO-8859-1';
1026         my $obj = Encode::find_encoding($requested) or
1027                 die_error(400, "Requested fallback encoding not found");
1028         if ($obj->name eq 'iso-8859-1') {
1029                 # Use Windows-1252 instead as required by the HTML 5 standard
1030                 my $altobj = Encode::find_encoding('Windows-1252');
1031                 $obj = $altobj if $altobj;
1032         }
1033         $encode_object = $obj;
1034         my $nm = lc($encode_object->name);
1035         unless ($nm eq 'cp1252' || $nm eq 'ascii' || $nm eq 'utf8' ||
1036                 $nm =~ /^utf-8/ || $nm =~ /^iso-8859-/) {
1037                 $to_utf8_pipe_command =
1038                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
1039                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
1040                     '--', "-fe=$fallback_encoding")." | ";
1041         }
1042 }
1043
1044 sub evaluate_email_obfuscate {
1045         # email obfuscation
1046         our $email;
1047         if (!$email && eval { require HTML::Email::Obfuscate; 1 }) {
1048                 $email = HTML::Email::Obfuscate->new(lite => 1);
1049         }
1050 }
1051
1052 # Get loadavg of system, to compare against $maxload.
1053 # Currently it requires '/proc/loadavg' present to get loadavg;
1054 # if it is not present it returns 0, which means no load checking.
1055 sub get_loadavg {
1056         if( -e '/proc/loadavg' ){
1057                 open my $fd, '<', '/proc/loadavg'
1058                         or return 0;
1059                 my @load = split(/\s+/, scalar <$fd>);
1060                 close $fd;
1061
1062                 # The first three columns measure CPU and IO utilization of the last one,
1063                 # five, and 10 minute periods.  The fourth column shows the number of
1064                 # currently running processes and the total number of processes in the m/n
1065                 # format.  The last column displays the last process ID used.
1066                 return $load[0] || 0;
1067         }
1068         # additional checks for load average should go here for things that don't export
1069         # /proc/loadavg
1070
1071         return 0;
1072 }
1073
1074 # version of the core git binary
1075 our $git_version;
1076 our $git_vernum = "0"; # guaranteed to always match /^\d+(\.\d+)*$/
1077 sub evaluate_git_version {
1078         $git_version = $version; # don't leak system information to attackers
1079         $git_vernum eq "0" or return; # don't run it again
1080         sub cmd_pipe;
1081         my $vers;
1082         if (defined(my $fd = cmd_pipe $GIT, '--version')) {
1083                 $vers = <$fd>;
1084                 close $fd;
1085                 $number_of_git_cmds++;
1086         }
1087         $git_vernum = $1 if defined($vers) && $vers =~ /git\s+version\s+(\d+(?:\.\d+)*)$/io;
1088 }
1089
1090 sub check_loadavg {
1091         if (defined $maxload && get_loadavg() > $maxload) {
1092                 die_error(503, "The load average on the server is too high");
1093         }
1094 }
1095
1096 # ======================================================================
1097 # input validation and dispatch
1098
1099 # input parameters can be collected from a variety of sources (presently, CGI
1100 # and PATH_INFO), so we define an %input_params hash that collects them all
1101 # together during validation: this allows subsequent uses (e.g. href()) to be
1102 # agnostic of the parameter origin
1103
1104 our %input_params = ();
1105
1106 # input parameters are stored with the long parameter name as key. This will
1107 # also be used in the href subroutine to convert parameters to their CGI
1108 # equivalent, and since the href() usage is the most frequent one, we store
1109 # the name -> CGI key mapping here, instead of the reverse.
1110 #
1111 # XXX: Warning: If you touch this, check the search form for updating,
1112 # too.
1113
1114 our @cgi_param_mapping = (
1115         project => "p",
1116         action => "a",
1117         file_name => "f",
1118         file_parent => "fp",
1119         hash => "h",
1120         hash_parent => "hp",
1121         hash_base => "hb",
1122         hash_parent_base => "hpb",
1123         page => "pg",
1124         order => "o",
1125         searchtext => "s",
1126         searchtype => "st",
1127         snapshot_format => "sf",
1128         ctag_filter => 't',
1129         extra_options => "opt",
1130         search_use_regexp => "sr",
1131         ctag => "by_tag",
1132         diff_style => "ds",
1133         project_filter => "pf",
1134         # this must be last entry (for manipulation from JavaScript)
1135         javascript => "js"
1136 );
1137 our %cgi_param_mapping = @cgi_param_mapping;
1138
1139 # we will also need to know the possible actions, for validation
1140 our %actions = (
1141         "blame" => \&git_blame,
1142         "blame_incremental" => \&git_blame_incremental,
1143         "blame_data" => \&git_blame_data,
1144         "blobdiff" => \&git_blobdiff,
1145         "blobdiff_plain" => \&git_blobdiff_plain,
1146         "blob" => \&git_blob,
1147         "blob_plain" => \&git_blob_plain,
1148         "commitdiff" => \&git_commitdiff,
1149         "commitdiff_plain" => \&git_commitdiff_plain,
1150         "commit" => \&git_commit,
1151         "forks" => \&git_forks,
1152         "heads" => \&git_heads,
1153         "history" => \&git_history,
1154         "log" => \&git_log,
1155         "patch" => \&git_patch,
1156         "patches" => \&git_patches,
1157         "refs" => \&git_refs,
1158         "remotes" => \&git_remotes,
1159         "rss" => \&git_rss,
1160         "atom" => \&git_atom,
1161         "search" => \&git_search,
1162         "search_help" => \&git_search_help,
1163         "shortlog" => \&git_shortlog,
1164         "summary" => \&git_summary,
1165         "tag" => \&git_tag,
1166         "tags" => \&git_tags,
1167         "tree" => \&git_tree,
1168         "snapshot" => \&git_snapshot,
1169         "object" => \&git_object,
1170         # those below don't need $project
1171         "opml" => \&git_opml,
1172         "frontpage" => \&git_frontpage,
1173         "project_list" => \&git_project_list,
1174         "project_index" => \&git_project_index,
1175 );
1176
1177 # the only actions we will allow to be cached
1178 my %supported_cache_actions;
1179 BEGIN {%supported_cache_actions = map {( $_ => 1 )} qw(summary)}
1180
1181 # finally, we have the hash of allowed extra_options for the commands that
1182 # allow them
1183 our %allowed_options = (
1184         "--no-merges" => [ qw(rss atom log shortlog history) ],
1185 );
1186
1187 # fill %input_params with the CGI parameters. All values except for 'opt'
1188 # should be single values, but opt can be an array. We should probably
1189 # build an array of parameters that can be multi-valued, but since for the time
1190 # being it's only this one, we just single it out
1191 sub evaluate_query_params {
1192         our $cgi;
1193
1194         while (my ($name, $symbol) = each %cgi_param_mapping) {
1195                 if ($symbol eq 'opt') {
1196                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
1197                 } else {
1198                         $input_params{$name} = decode_utf8($cgi->param($symbol));
1199                 }
1200         }
1201
1202         # Backwards compatibility - by_tag= <=> t=
1203         if ($input_params{'ctag'}) {
1204                 $input_params{'ctag_filter'} = $input_params{'ctag'};
1205         }
1206 }
1207
1208 # now read PATH_INFO and update the parameter list for missing parameters
1209 sub evaluate_path_info {
1210         return if defined $input_params{'project'};
1211         return if !$path_info;
1212         $path_info =~ s,^/+,,;
1213         return if !$path_info;
1214
1215         # find which part of PATH_INFO is project
1216         my $project = $path_info;
1217         $project =~ s,/+$,,;
1218         while ($project && !check_head_link("$projectroot/$project")) {
1219                 $project =~ s,/*[^/]*$,,;
1220         }
1221         return unless $project;
1222         $input_params{'project'} = $project;
1223
1224         # do not change any parameters if an action is given using the query string
1225         return if $input_params{'action'};
1226         $path_info =~ s,^\Q$project\E/*,,;
1227
1228         # next, check if we have an action
1229         my $action = $path_info;
1230         $action =~ s,/.*$,,;
1231         if (exists $actions{$action}) {
1232                 $path_info =~ s,^$action/*,,;
1233                 $input_params{'action'} = $action;
1234         }
1235
1236         # list of actions that want hash_base instead of hash, but can have no
1237         # pathname (f) parameter
1238         my @wants_base = (
1239                 'tree',
1240                 'history',
1241         );
1242
1243         # we want to catch, among others
1244         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
1245         my ($parentrefname, $parentpathname, $refname, $pathname) =
1246                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
1247
1248         # first, analyze the 'current' part
1249         if (defined $pathname) {
1250                 # we got "branch:filename" or "branch:dir/"
1251                 # we could use git_get_type(branch:pathname), but:
1252                 # - it needs $git_dir
1253                 # - it does a git() call
1254                 # - the convention of terminating directories with a slash
1255                 #   makes it superfluous
1256                 # - embedding the action in the PATH_INFO would make it even
1257                 #   more superfluous
1258                 $pathname =~ s,^/+,,;
1259                 if (!$pathname || substr($pathname, -1) eq "/") {
1260                         $input_params{'action'} ||= "tree";
1261                         $pathname =~ s,/$,,;
1262                 } else {
1263                         # the default action depends on whether we had parent info
1264                         # or not
1265                         if ($parentrefname) {
1266                                 $input_params{'action'} ||= "blobdiff_plain";
1267                         } else {
1268                                 $input_params{'action'} ||= "blob_plain";
1269                         }
1270                 }
1271                 $input_params{'hash_base'} ||= $refname;
1272                 $input_params{'file_name'} ||= $pathname;
1273         } elsif (defined $refname) {
1274                 # we got "branch". In this case we have to choose if we have to
1275                 # set hash or hash_base.
1276                 #
1277                 # Most of the actions without a pathname only want hash to be
1278                 # set, except for the ones specified in @wants_base that want
1279                 # hash_base instead. It should also be noted that hand-crafted
1280                 # links having 'history' as an action and no pathname or hash
1281                 # set will fail, but that happens regardless of PATH_INFO.
1282                 if (defined $parentrefname) {
1283                         # if there is parent let the default be 'shortlog' action
1284                         # (for http://git.example.com/repo.git/A..B links); if there
1285                         # is no parent, dispatch will detect type of object and set
1286                         # action appropriately if required (if action is not set)
1287                         $input_params{'action'} ||= "shortlog";
1288                 }
1289                 if ($input_params{'action'} &&
1290                     grep { $_ eq $input_params{'action'} } @wants_base) {
1291                         $input_params{'hash_base'} ||= $refname;
1292                 } else {
1293                         $input_params{'hash'} ||= $refname;
1294                 }
1295         }
1296
1297         # next, handle the 'parent' part, if present
1298         if (defined $parentrefname) {
1299                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1300                 # someproject/blobdiff/oldrev..newrev:/filename
1301                 if ($parentpathname) {
1302                         $parentpathname =~ s,^/+,,;
1303                         $parentpathname =~ s,/$,,;
1304                         $input_params{'file_parent'} ||= $parentpathname;
1305                 } else {
1306                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1307                 }
1308                 # we assume that hash_parent_base is wanted if a path was specified,
1309                 # or if the action wants hash_base instead of hash
1310                 if (defined $input_params{'file_parent'} ||
1311                         grep { $_ eq $input_params{'action'} } @wants_base) {
1312                         $input_params{'hash_parent_base'} ||= $parentrefname;
1313                 } else {
1314                         $input_params{'hash_parent'} ||= $parentrefname;
1315                 }
1316         }
1317
1318         # for the snapshot action, we allow URLs in the form
1319         # $project/snapshot/$hash.ext
1320         # where .ext determines the snapshot and gets removed from the
1321         # passed $refname to provide the $hash.
1322         #
1323         # To be able to tell that $refname includes the format extension, we
1324         # require the following two conditions to be satisfied:
1325         # - the hash input parameter MUST have been set from the $refname part
1326         #   of the URL (i.e. they must be equal)
1327         # - the snapshot format MUST NOT have been defined already (e.g. from
1328         #   CGI parameter sf)
1329         # It's also useless to try any matching unless $refname has a dot,
1330         # so we check for that too
1331         if (defined $input_params{'action'} &&
1332                 $input_params{'action'} eq 'snapshot' &&
1333                 defined $refname && index($refname, '.') != -1 &&
1334                 $refname eq $input_params{'hash'} &&
1335                 !defined $input_params{'snapshot_format'}) {
1336                 # We loop over the known snapshot formats, checking for
1337                 # extensions. Allowed extensions are both the defined suffix
1338                 # (which includes the initial dot already) and the snapshot
1339                 # format key itself, with a prepended dot
1340                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1341                         my $hash = $refname;
1342                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1343                                 next;
1344                         }
1345                         my $sfx = $1;
1346                         # a valid suffix was found, so set the snapshot format
1347                         # and reset the hash parameter
1348                         $input_params{'snapshot_format'} = $fmt;
1349                         $input_params{'hash'} = $hash;
1350                         # we also set the format suffix to the one requested
1351                         # in the URL: this way a request for e.g. .tgz returns
1352                         # a .tgz instead of a .tar.gz
1353                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1354                         last;
1355                 }
1356         }
1357 }
1358
1359 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1360      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1361      $searchtext, $search_regexp, $project_filter);
1362 sub evaluate_and_validate_params {
1363         our $action = $input_params{'action'};
1364         if (defined $action) {
1365                 if (!is_valid_action($action)) {
1366                         die_error(400, "Invalid action parameter");
1367                 }
1368         }
1369
1370         # parameters which are pathnames
1371         our $project = $input_params{'project'};
1372         if (defined $project) {
1373                 if (!is_valid_project($project)) {
1374                         undef $project;
1375                         die_error(404, "No such project");
1376                 }
1377         }
1378
1379         our $project_filter = $input_params{'project_filter'};
1380         if (defined $project_filter) {
1381                 if (!is_valid_pathname($project_filter)) {
1382                         die_error(404, "Invalid project_filter parameter");
1383                 }
1384         }
1385
1386         our $file_name = $input_params{'file_name'};
1387         if (defined $file_name) {
1388                 if (!is_valid_pathname($file_name)) {
1389                         die_error(400, "Invalid file parameter");
1390                 }
1391         }
1392
1393         our $file_parent = $input_params{'file_parent'};
1394         if (defined $file_parent) {
1395                 if (!is_valid_pathname($file_parent)) {
1396                         die_error(400, "Invalid file parent parameter");
1397                 }
1398         }
1399
1400         # parameters which are refnames
1401         our $hash = $input_params{'hash'};
1402         if (defined $hash) {
1403                 if (!is_valid_refname($hash)) {
1404                         die_error(400, "Invalid hash parameter");
1405                 }
1406         }
1407
1408         our $hash_parent = $input_params{'hash_parent'};
1409         if (defined $hash_parent) {
1410                 if (!is_valid_refname($hash_parent)) {
1411                         die_error(400, "Invalid hash parent parameter");
1412                 }
1413         }
1414
1415         our $hash_base = $input_params{'hash_base'};
1416         if (defined $hash_base) {
1417                 if (!is_valid_refname($hash_base)) {
1418                         die_error(400, "Invalid hash base parameter");
1419                 }
1420         }
1421
1422         our @extra_options = @{$input_params{'extra_options'}};
1423         # @extra_options is always defined, since it can only be (currently) set from
1424         # CGI, and $cgi->param() returns the empty array in array context if the param
1425         # is not set
1426         foreach my $opt (@extra_options) {
1427                 if (not exists $allowed_options{$opt}) {
1428                         die_error(400, "Invalid option parameter");
1429                 }
1430                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1431                         die_error(400, "Invalid option parameter for this action");
1432                 }
1433         }
1434
1435         our $hash_parent_base = $input_params{'hash_parent_base'};
1436         if (defined $hash_parent_base) {
1437                 if (!is_valid_refname($hash_parent_base)) {
1438                         die_error(400, "Invalid hash parent base parameter");
1439                 }
1440         }
1441
1442         # other parameters
1443         our $page = $input_params{'page'};
1444         if (defined $page) {
1445                 if ($page =~ m/[^0-9]/) {
1446                         die_error(400, "Invalid page parameter");
1447                 }
1448         }
1449
1450         our $searchtype = $input_params{'searchtype'};
1451         if (defined $searchtype) {
1452                 if ($searchtype =~ m/[^a-z]/) {
1453                         die_error(400, "Invalid searchtype parameter");
1454                 }
1455         }
1456
1457         our $search_use_regexp = $input_params{'search_use_regexp'};
1458
1459         our $searchtext = $input_params{'searchtext'};
1460         our $search_regexp = undef;
1461         if (defined $searchtext) {
1462                 if (length($searchtext) < 2) {
1463                         die_error(403, "At least two characters are required for search parameter");
1464                 }
1465                 if ($search_use_regexp) {
1466                         $search_regexp = $searchtext;
1467                         if (!eval { qr/$search_regexp/; 1; }) {
1468                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1469                                 die_error(400, "Invalid search regexp '$search_regexp'",
1470                                           esc_html($error));
1471                         }
1472                 } else {
1473                         $search_regexp = quotemeta $searchtext;
1474                 }
1475         }
1476 }
1477
1478 # path to the current git repository
1479 our $git_dir;
1480 sub evaluate_git_dir {
1481         our $git_dir = $project ? "$projectroot/$project" : undef;
1482 }
1483
1484 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1485 sub configure_gitweb_features {
1486         # list of supported snapshot formats
1487         our @snapshot_fmts = gitweb_get_feature('snapshot');
1488         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1489
1490         # check that the avatar feature is set to a known provider name,
1491         # and for each provider check if the dependencies are satisfied.
1492         # if the provider name is invalid or the dependencies are not met,
1493         # reset $git_avatar to the empty string.
1494         our ($git_avatar) = gitweb_get_feature('avatar');
1495         if ($git_avatar eq 'gravatar') {
1496                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1497         } elsif ($git_avatar eq 'picon') {
1498                 # no dependencies
1499         } else {
1500                 $git_avatar = '';
1501         }
1502
1503         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1504         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1505 }
1506
1507 sub get_branch_refs {
1508         return ('heads', @extra_branch_refs);
1509 }
1510
1511 # custom error handler: 'die <message>' is Internal Server Error
1512 sub handle_errors_html {
1513         my $msg = shift; # it is already HTML escaped
1514
1515         # to avoid infinite loop where error occurs in die_error,
1516         # change handler to default handler, disabling handle_errors_html
1517         set_message("Error occurred when inside die_error:\n$msg");
1518
1519         # you cannot jump out of die_error when called as error handler;
1520         # the subroutine set via CGI::Carp::set_message is called _after_
1521         # HTTP headers are already written, so it cannot write them itself
1522         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1523 }
1524 set_message(\&handle_errors_html);
1525
1526 our $shown_stale_message = 0;
1527 our $cache_dump = undef;
1528 our $cache_dump_mtime = undef;
1529
1530 # dispatch
1531 my $cache_mode_active;
1532 sub dispatch {
1533         if (!defined $action) {
1534                 if (defined $hash) {
1535                         $action = git_get_type($hash);
1536                         $action or die_error(404, "Object does not exist");
1537                 } elsif (defined $hash_base && defined $file_name) {
1538                         $action = git_get_type("$hash_base:$file_name");
1539                         $action or die_error(404, "File or directory does not exist");
1540                 } elsif (defined $project) {
1541                         $action = 'summary';
1542                 } else {
1543                         $action = 'frontpage';
1544                 }
1545         }
1546         if (!defined($actions{$action})) {
1547                 die_error(400, "Unknown action");
1548         }
1549         if ($action !~ m/^(?:opml|frontpage|project_list|project_index)$/ &&
1550             !$project) {
1551                 die_error(400, "Project needed");
1552         }
1553
1554         my $cached_page = $supported_cache_actions{$action}
1555                 ? cached_action_page($action)
1556                 : undef;
1557         goto DUMPCACHE if $cached_page;
1558         local *SAVEOUT = *STDOUT;
1559         $cache_mode_active = $supported_cache_actions{$action}
1560                 ? cached_action_start($action)
1561                 : undef;
1562
1563         configure_gitweb_features();
1564         $actions{$action}->();
1565
1566         return unless $cache_mode_active;
1567
1568         $cached_page = cached_action_finish($action);
1569         *STDOUT = *SAVEOUT;
1570
1571         DUMPCACHE:
1572
1573         $cache_mode_active = 0;
1574         # Avoid any extra unwanted encoding steps as $cached_page is raw bytes
1575         binmode STDOUT, ':raw';
1576         our $fcgi_raw_mode = 1;
1577         print expand_gitweb_pi($cached_page, time);
1578         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
1579         $fcgi_raw_mode = 0;
1580 }
1581
1582 sub reset_timer {
1583         our $t0 = [ gettimeofday() ]
1584                 if defined $t0;
1585         our $number_of_git_cmds = 0;
1586 }
1587
1588 our $first_request = 1;
1589 our $evaluate_uri_force = undef;
1590 sub run_request {
1591         reset_timer();
1592
1593         # Only allow GET and HEAD methods
1594         if (!$ENV{'REQUEST_METHOD'} || ($ENV{'REQUEST_METHOD'} ne 'GET' && $ENV{'REQUEST_METHOD'} ne 'HEAD')) {
1595                 print <<EOT;
1596 Status: 405 Method Not Allowed
1597 Content-Type: text/plain
1598 Allow: GET,HEAD
1599
1600 405 Method Not Allowed
1601 EOT
1602                 return;
1603         }
1604
1605         evaluate_uri();
1606         &$evaluate_uri_force() if $evaluate_uri_force;
1607         if ($per_request_config) {
1608                 if (ref($per_request_config) eq 'CODE') {
1609                         $per_request_config->();
1610                 } elsif (!$first_request) {
1611                         evaluate_gitweb_config();
1612                         evaluate_email_obfuscate();
1613                 }
1614         }
1615         check_loadavg();
1616
1617         # $projectroot and $projects_list might be set in gitweb config file
1618         $projects_list ||= $projectroot;
1619
1620         evaluate_query_params();
1621         evaluate_path_info();
1622         evaluate_and_validate_params();
1623         evaluate_git_dir();
1624
1625         dispatch();
1626 }
1627
1628 our $is_last_request = sub { 1 };
1629 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1630 our $CGI = 'CGI';
1631 our $cgi;
1632 our $fcgi_mode = 0;
1633 our $fcgi_nproc_active = 0;
1634 our $fcgi_raw_mode = 0;
1635 sub is_fcgi {
1636         use Errno;
1637         my $stdinfno = fileno STDIN;
1638         return 0 unless defined $stdinfno && $stdinfno == 0;
1639         return 0 unless getsockname STDIN;
1640         return 0 if getpeername STDIN;
1641         return $!{ENOTCONN}?1:0;
1642 }
1643 sub configure_as_fcgi {
1644         return if $fcgi_mode;
1645
1646         require FCGI;
1647         require CGI::Fast;
1648
1649         # We have gone to great effort to make sure that all incoming data has
1650         # been converted from whatever format it was in into UTF-8.  We have
1651         # even taken care to make sure the output handle is in ':utf8' mode.
1652         # Now along comes FCGI and blows it with:
1653         #
1654         #     Use of wide characters in FCGI::Stream::PRINT is deprecated
1655         #      and will stop wprking[sic] in a future version of FCGI
1656         #
1657         # To fix this we replace FCGI::Stream::PRINT with our own routine that
1658         # first encodes everything and then calls the original routine, but
1659         # not if $fcgi_raw_mode is true (then we just call the original routine).
1660         #
1661         # Note that we could do this by using utf8::is_utf8 to check instead
1662         # of having a $fcgi_raw_mode global, but that would be slower to run
1663         # the test on each element and much slower than skipping the conversion
1664         # entirely when we know we're outputting raw bytes.
1665         my $orig = \&FCGI::Stream::PRINT;
1666         undef *FCGI::Stream::PRINT;
1667         *FCGI::Stream::PRINT = sub {
1668                 @_ = (shift, map {my $x=$_; utf8::encode($x); $x} @_)
1669                         unless $fcgi_raw_mode;
1670                 goto $orig;
1671         };
1672
1673         our $CGI = 'CGI::Fast';
1674
1675         $fcgi_mode = 1;
1676         $first_request = 0;
1677         my $request_number = 0;
1678         # let each child service 100 requests
1679         our $is_last_request = sub { ++$request_number >= 100 };
1680 }
1681 sub evaluate_argv {
1682         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1683         configure_as_fcgi()
1684                 if $script_name =~ /\.fcgi$/ || ($auto_fcgi && is_fcgi());
1685
1686         my $nproc_sub = sub {
1687                 my ($arg, $val) = @_;
1688                 return unless eval { require FCGI::ProcManager; 1; };
1689                 $fcgi_nproc_active = 1;
1690                 my $proc_manager = FCGI::ProcManager->new({
1691                         n_processes => $val,
1692                 });
1693                 our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1694                 our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1695                 our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1696         };
1697         if (@ARGV) {
1698                 require Getopt::Long;
1699                 Getopt::Long::GetOptions(
1700                         'fastcgi|fcgi|f' => \&configure_as_fcgi,
1701                         'nproc|n=i' => $nproc_sub,
1702                 );
1703         };
1704         if (!$fcgi_nproc_active && defined $ENV{'GITWEB_FCGI_NPROC'} && $ENV{'GITWEB_FCGI_NPROC'} =~ /^\d+$/) {
1705                 &$nproc_sub('nproc', $ENV{'GITWEB_FCGI_NPROC'});
1706         }
1707 }
1708
1709 # Any "our" variable that could possibly influence correct handling of
1710 # a CGI request MUST be reset in this subroutine
1711 sub _reset_globals {
1712         # Note that $t0 and $number_of_git_commands are handled by reset_timer
1713         our %input_params = ();
1714         our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1715              $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1716              $searchtext, $search_regexp, $project_filter) = ();
1717         our $git_dir = undef;
1718         our (@snapshot_fmts, $git_avatar, @extra_branch_refs) = ();
1719         our %avatar_cache = ();
1720         our $config_file = '';
1721         our %config = ();
1722         our $gitweb_project_owner = undef;
1723         our $shown_stale_message = 0;
1724         our $fcgi_raw_mode = 0;
1725         keys %known_snapshot_formats; # reset 'each' iterator
1726 }
1727
1728 sub run {
1729         evaluate_gitweb_config();
1730         evaluate_encoding();
1731         evaluate_email_obfuscate();
1732         evaluate_git_version();
1733         my ($ml, $mi, $bu, $hl, $subroutine) = ($my_url, $my_uri, $base_url, $home_link, '');
1734         $subroutine .= '$my_url = $ml;' if defined $my_url && $my_url ne '';
1735         $subroutine .= '$my_uri = $mi;' if defined $my_uri; # this one can be ""
1736         $subroutine .= '$base_url = $bu;' if defined $base_url && $base_url ne '';
1737         $subroutine .= '$home_link = $hl;' if defined $home_link && $home_link ne '';
1738         $evaluate_uri_force = eval "sub {$subroutine}" if $subroutine;
1739         $first_request = 1;
1740         evaluate_argv();
1741
1742         $pre_listen_hook->()
1743                 if $pre_listen_hook;
1744
1745  REQUEST:
1746         while ($cgi = $CGI->new()) {
1747                 $pre_dispatch_hook->()
1748                         if $pre_dispatch_hook;
1749                 {
1750                         # most globals can simply be reset
1751                         _reset_globals;
1752
1753                         # evaluate_path_info corrupts %known_snapshot_formats
1754                         # so we need a deepish copy of it -- note that
1755                         # _reset_globals already took care of resetting its
1756                         # hash iterator that evaluate_path_info also leaves
1757                         # in an indeterminate state
1758                         my %formats = ();
1759                         while (my ($k,$v) = each(%known_snapshot_formats)) {
1760                                 $formats{$k} = {%{$known_snapshot_formats{$k}}};
1761                         }
1762                         local *known_snapshot_formats = \%formats;
1763
1764                         eval {run_request()};
1765                 }
1766                 $post_dispatch_hook->()
1767                         if $post_dispatch_hook;
1768                 $first_request = 0;
1769
1770                 last REQUEST if ($is_last_request->());
1771         }
1772
1773         1;
1774 }
1775
1776 run();
1777
1778 if (defined caller) {
1779         # wrapped in a subroutine processing requests,
1780         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1781         return;
1782 } else {
1783         # pure CGI script, serving single request
1784         exit;
1785 }
1786
1787 ## ======================================================================
1788 ## action links
1789
1790 # possible values of extra options
1791 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1792 # -replay => 1      - start from a current view (replay with modifications)
1793 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1794 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1795 sub href {
1796         my %params = @_;
1797         # default is to use -absolute url() i.e. $my_uri
1798         my $href = $params{-full} ? $my_url : $my_uri;
1799
1800         # implicit -replay, must be first of implicit params
1801         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1802
1803         $params{'project'} = $project unless exists $params{'project'};
1804
1805         if ($params{-replay}) {
1806                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1807                         if (!exists $params{$name}) {
1808                                 $params{$name} = $input_params{$name};
1809                         }
1810                 }
1811         }
1812
1813         my $use_pathinfo = gitweb_check_feature('pathinfo');
1814         if (defined $params{'project'} &&
1815             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1816                 # try to put as many parameters as possible in PATH_INFO:
1817                 #   - project name
1818                 #   - action
1819                 #   - hash_parent or hash_parent_base:/file_parent
1820                 #   - hash or hash_base:/filename
1821                 #   - the snapshot_format as an appropriate suffix
1822
1823                 # When the script is the root DirectoryIndex for the domain,
1824                 # $href here would be something like http://gitweb.example.com/
1825                 # Thus, we strip any trailing / from $href, to spare us double
1826                 # slashes in the final URL
1827                 $href =~ s,/$,,;
1828
1829                 # Then add the project name, if present
1830                 $href .= "/".esc_path_info($params{'project'});
1831                 delete $params{'project'};
1832
1833                 # since we destructively absorb parameters, we keep this
1834                 # boolean that remembers if we're handling a snapshot
1835                 my $is_snapshot = $params{'action'} eq 'snapshot';
1836
1837                 # Summary just uses the project path URL, any other action is
1838                 # added to the URL
1839                 if (defined $params{'action'}) {
1840                         $href .= "/".esc_path_info($params{'action'})
1841                                 unless $params{'action'} eq 'summary';
1842                         delete $params{'action'};
1843                 }
1844
1845                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1846                 # stripping nonexistent or useless pieces
1847                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1848                         || $params{'hash_parent'} || $params{'hash'});
1849                 if (defined $params{'hash_base'}) {
1850                         if (defined $params{'hash_parent_base'}) {
1851                                 $href .= esc_path_info($params{'hash_parent_base'});
1852                                 # skip the file_parent if it's the same as the file_name
1853                                 if (defined $params{'file_parent'}) {
1854                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1855                                                 delete $params{'file_parent'};
1856                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1857                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1858                                                 delete $params{'file_parent'};
1859                                         }
1860                                 }
1861                                 $href .= "..";
1862                                 delete $params{'hash_parent'};
1863                                 delete $params{'hash_parent_base'};
1864                         } elsif (defined $params{'hash_parent'}) {
1865                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1866                                 delete $params{'hash_parent'};
1867                         }
1868
1869                         $href .= esc_path_info($params{'hash_base'});
1870                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1871                                 $href .= ":/".esc_path_info($params{'file_name'});
1872                                 delete $params{'file_name'};
1873                         }
1874                         delete $params{'hash'};
1875                         delete $params{'hash_base'};
1876                 } elsif (defined $params{'hash'}) {
1877                         $href .= esc_path_info($params{'hash'});
1878                         delete $params{'hash'};
1879                 }
1880
1881                 # If the action was a snapshot, we can absorb the
1882                 # snapshot_format parameter too
1883                 if ($is_snapshot) {
1884                         my $fmt = $params{'snapshot_format'};
1885                         # snapshot_format should always be defined when href()
1886                         # is called, but just in case some code forgets, we
1887                         # fall back to the default
1888                         $fmt ||= $snapshot_fmts[0];
1889                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1890                         delete $params{'snapshot_format'};
1891                 }
1892         }
1893
1894         # now encode the parameters explicitly
1895         my @result = ();
1896         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1897                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1898                 if (defined $params{$name}) {
1899                         if (ref($params{$name}) eq "ARRAY") {
1900                                 foreach my $par (@{$params{$name}}) {
1901                                         push @result, $symbol . "=" . esc_param($par);
1902                                 }
1903                         } else {
1904                                 push @result, $symbol . "=" . esc_param($params{$name});
1905                         }
1906                 }
1907         }
1908         $href .= "?" . join(';', @result) if scalar @result;
1909
1910         # final transformation: trailing spaces must be escaped (URI-encoded)
1911         $href =~ s/(\s+)$/CGI::escape($1)/e;
1912
1913         if ($params{-anchor}) {
1914                 $href .= "#".esc_param($params{-anchor});
1915         }
1916
1917         return $href;
1918 }
1919
1920
1921 ## ======================================================================
1922 ## validation, quoting/unquoting and escaping
1923
1924 sub is_valid_action {
1925         my $input = shift;
1926         return undef unless exists $actions{$input};
1927         return 1;
1928 }
1929
1930 sub is_valid_project {
1931         my $input = shift;
1932
1933         return unless defined $input;
1934         if (!is_valid_pathname($input) ||
1935                 !(-d "$projectroot/$input") ||
1936                 !check_export_ok("$projectroot/$input") ||
1937                 ($strict_export && !project_in_list($input))) {
1938                 return undef;
1939         } else {
1940                 return 1;
1941         }
1942 }
1943
1944 sub is_valid_pathname {
1945         my $input = shift;
1946
1947         return undef unless defined $input;
1948         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1949         # at the beginning, at the end, and between slashes.
1950         # also this catches doubled slashes
1951         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1952                 return undef;
1953         }
1954         # no null characters
1955         if ($input =~ m!\0!) {
1956                 return undef;
1957         }
1958         return 1;
1959 }
1960
1961 sub is_valid_ref_format {
1962         my $input = shift;
1963
1964         return undef unless defined $input;
1965         # restrictions on ref name according to git-check-ref-format
1966         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1967                 return undef;
1968         }
1969         return 1;
1970 }
1971
1972 sub is_valid_refname {
1973         my $input = shift;
1974
1975         return undef unless defined $input;
1976         # textual hashes are O.K.
1977         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1978                 return 1;
1979         }
1980         # allow repeated trailing '[~^]n*' suffix(es)
1981         $input =~ s/^([^~^]+)(?:[~^]\d*)+$/$1/;
1982         # it must be correct pathname
1983         is_valid_pathname($input) or return undef;
1984         # check git-check-ref-format restrictions
1985         is_valid_ref_format($input) or return undef;
1986         return 1;
1987 }
1988
1989 # decode sequences of octets in utf8 into Perl's internal form,
1990 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1991 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1992 sub to_utf8 {
1993         my $str = shift;
1994         return undef unless defined $str;
1995
1996         if (utf8::is_utf8($str) || utf8::decode($str)) {
1997                 return $str;
1998         } else {
1999                 return $encode_object->decode($str, Encode::FB_DEFAULT);
2000         }
2001 }
2002
2003 # quote unsafe chars, but keep the slash, even when it's not
2004 # correct, but quoted slashes look too horrible in bookmarks
2005 sub esc_param {
2006         my $str = shift;
2007         return undef unless defined $str;
2008         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
2009         $str =~ s/ /\+/g;
2010         return $str;
2011 }
2012
2013 # the quoting rules for path_info fragment are slightly different
2014 sub esc_path_info {
2015         my $str = shift;
2016         return undef unless defined $str;
2017
2018         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
2019         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
2020
2021         return $str;
2022 }
2023
2024 # quote unsafe chars in whole URL, so some characters cannot be quoted
2025 sub esc_url {
2026         my $str = shift;
2027         return undef unless defined $str;
2028         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
2029         $str =~ s/ /\+/g;
2030         return $str;
2031 }
2032
2033 # quote unsafe characters in HTML attributes
2034 sub esc_attr {
2035
2036         # for XHTML conformance escaping '"' to '&quot;' is not enough
2037         return esc_html(@_);
2038 }
2039
2040 # replace invalid utf8 character with SUBSTITUTION sequence
2041 sub esc_html {
2042         my $str = shift;
2043         my %opts = @_;
2044
2045         return undef unless defined $str;
2046
2047         $str = to_utf8($str);
2048         $str = $cgi->escapeHTML($str);
2049         if ($opts{'-nbsp'}) {
2050                 $str =~ s/ /&#160;/g;
2051         }
2052         use bytes;
2053         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
2054         return $str;
2055 }
2056
2057 # quote control characters and escape filename to HTML
2058 sub esc_path {
2059         my $str = shift;
2060         my %opts = @_;
2061
2062         return undef unless defined $str;
2063
2064         $str = to_utf8($str);
2065         $str = $cgi->escapeHTML($str);
2066         if ($opts{'-nbsp'}) {
2067                 $str =~ s/ /&#160;/g;
2068         }
2069         use bytes;
2070         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
2071         return $str;
2072 }
2073
2074 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
2075 sub sanitize {
2076         my $str = shift;
2077
2078         return undef unless defined $str;
2079
2080         $str = to_utf8($str);
2081         use bytes;
2082         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
2083         return $str;
2084 }
2085
2086 # Make control characters "printable", using character escape codes (CEC)
2087 sub quot_cec {
2088         my $cntrl = shift;
2089         my %opts = @_;
2090         my %es = ( # character escape codes, aka escape sequences
2091                 "\t" => '\t',   # tab            (HT)
2092                 "\n" => '\n',   # line feed      (LF)
2093                 "\r" => '\r',   # carrige return (CR)
2094                 "\f" => '\f',   # form feed      (FF)
2095                 "\b" => '\b',   # backspace      (BS)
2096                 "\a" => '\a',   # alarm (bell)   (BEL)
2097                 "\e" => '\e',   # escape         (ESC)
2098                 "\013" => '\v', # vertical tab   (VT)
2099                 "\000" => '\0', # nul character  (NUL)
2100         );
2101         my $chr = ( (exists $es{$cntrl})
2102                     ? $es{$cntrl}
2103                     : sprintf('\x%02x', ord($cntrl)) );
2104         if ($opts{-nohtml}) {
2105                 return $chr;
2106         } else {
2107                 return "<span class=\"cntrl\">$chr</span>";
2108         }
2109 }
2110
2111 # Alternatively use unicode control pictures codepoints,
2112 # Unicode "printable representation" (PR)
2113 sub quot_upr {
2114         my $cntrl = shift;
2115         my %opts = @_;
2116
2117         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
2118         if ($opts{-nohtml}) {
2119                 return $chr;
2120         } else {
2121                 return "<span class=\"cntrl\">$chr</span>";
2122         }
2123 }
2124
2125 # git may return quoted and escaped filenames
2126 sub unquote {
2127         my $str = shift;
2128
2129         sub unq {
2130                 my $seq = shift;
2131                 my %es = ( # character escape codes, aka escape sequences
2132                         't' => "\t",   # tab            (HT, TAB)
2133                         'n' => "\n",   # newline        (NL)
2134                         'r' => "\r",   # return         (CR)
2135                         'f' => "\f",   # form feed      (FF)
2136                         'b' => "\b",   # backspace      (BS)
2137                         'a' => "\a",   # alarm (bell)   (BEL)
2138                         'e' => "\e",   # escape         (ESC)
2139                         'v' => "\013", # vertical tab   (VT)
2140                 );
2141
2142                 if ($seq =~ m/^[0-7]{1,3}$/) {
2143                         # octal char sequence
2144                         return chr(oct($seq));
2145                 } elsif (exists $es{$seq}) {
2146                         # C escape sequence, aka character escape code
2147                         return $es{$seq};
2148                 }
2149                 # quoted ordinary character
2150                 return $seq;
2151         }
2152
2153         if ($str =~ m/^"(.*)"$/) {
2154                 # needs unquoting
2155                 $str = $1;
2156                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
2157         }
2158         return $str;
2159 }
2160
2161 # escape tabs (convert tabs to spaces)
2162 sub untabify {
2163         my $line = shift;
2164
2165         while ((my $pos = index($line, "\t")) != -1) {
2166                 if (my $count = (8 - ($pos % 8))) {
2167                         my $spaces = ' ' x $count;
2168                         $line =~ s/\t/$spaces/;
2169                 }
2170         }
2171
2172         return $line;
2173 }
2174
2175 sub project_in_list {
2176         my $project = shift;
2177         my @list = git_get_projects_list();
2178         return @list && scalar(grep { $_->{'path'} eq $project } @list);
2179 }
2180
2181 sub cached_page_precondition_check {
2182         my $action = shift;
2183         return 1 unless
2184                 $action eq 'summary' &&
2185                 $projlist_cache_lifetime > 0 &&
2186                 gitweb_check_feature('forks');
2187
2188         # Note that ALL the 'forkchange' logic is in this function.
2189         # It does NOT belong in cached_action_page NOR in cached_action_start
2190         # NOR in cached_action_finish.  None of those functions should know anything
2191         # about nor do anything to any of the 'forkchange'/"$action.forkchange" files.
2192
2193         # besides the basic 'changed' "$action.changed" check, we may only use
2194         # a summary cache if:
2195         #
2196         #   1) we are not using a project list cache file
2197         #   -OR-
2198         #   2) we are not using the 'forks' feature
2199         #   -OR-
2200         #   3) there is no 'forkchange' nor "$action.forkchange" file in $html_cache_dir
2201         #   -OR-
2202         #   4) there is no cache file ("$cache_dir/$projlist_cache_name")
2203         #   -OR-
2204         #   5) the OLDER of 'forkchange'/"$action.forkchange" is NEWER than the cache file
2205         #
2206         # Otherwise we must re-generate the cache because we've had a fork change
2207         # (either a fork was added or a fork was removed) AND the change has been
2208         # picked up in the cache file AND we've not got that in our cached copy
2209         #
2210         # For (5) regenerating the cached page wouldn't get us anything if the project
2211         # cache file is older than the 'forkchange'/"$action.forkchange" because the
2212         # forks information comes from the project cache file and it's clearly not
2213         # picked up the changes yet so we may continue to use a cached page until it does.
2214
2215         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2216         my $fc_mt = (stat("$htmlcd/forkchange"))[9];
2217         my $afc_mt = (stat("$htmlcd/$action.forkchange"))[9];
2218         return 1 unless defined($fc_mt) || defined($afc_mt);
2219         my $prj_mt = (stat("$cache_dir/$projlist_cache_name"))[9];
2220         return 1 unless $prj_mt;
2221         my $old_mt = $fc_mt;
2222         $old_mt = $afc_mt if !defined($old_mt) || (defined($afc_mt) && $afc_mt < $old_mt);
2223         return 1 if $old_mt > $prj_mt;
2224
2225         # We're going to regenerate the cached page because we know the project cache
2226         # has new fork information that we cannot possibly have in our cached copy.
2227         #
2228         # However, if both 'forkchange' and "$action.forkchange" exist and one of
2229         # them is older than the project cache and one of them is newer, we still
2230         # need to regenerate the page cache, but we will also need to do it again
2231         # in the future because there's yet another fork update not yet in the cache.
2232         #
2233         # So we make sure to touch "$action.changed" to force a cache regeneration
2234         # and then we remove either or both of 'forkchange'/"$action.forkchange" if
2235         # they're older than the project cache (they've served their purpose, we're
2236         # forcing a page regeneration by touching "$action.changed" but the project
2237         # cache was rebuilt since then so there are no more pending fork updates to
2238         # pick up in the future and they need to go).
2239
2240         # For best results, the external code that touches 'forkchange' should always
2241         # touch 'forkchange' and additionally touch 'summary.forkchange' but only
2242         # if it does not already exist.  That way the cached page will be regenerated
2243         # each time it's requested and ANY fork updates are available in the proj
2244         # cache rather than waiting until they all are before updating.
2245
2246         # Note that we take a shortcut here and will zap 'forkchange' since we know
2247         # that it only affects the 'summary' cache.  If, in the future, it affects
2248         # other cache types, it will first need to be propogated down to
2249         # "$action.forkchange" for those types before we zap it.
2250
2251         my $fd;
2252         open $fd, '>', "$htmlcd/$action.changed" and close $fd;
2253         $fc_mt=undef, unlink "$htmlcd/forkchange" if defined $fc_mt && $fc_mt < $prj_mt;
2254         $afc_mt=undef, unlink "$htmlcd/$action.forkchange" if defined $afc_mt && $afc_mt < $prj_mt;
2255
2256         # Now we propagate 'forkchange' to "$action.forkchange" if we have the
2257         # one and not the other.
2258
2259         if (defined $fc_mt && ! defined $afc_mt) {
2260                 open $fd, '>', "$htmlcd/$action.forkchange" and close $fd;
2261                 -e "$htmlcd/$action.forkchange" and
2262                 utime($fc_mt, $fc_mt, "$htmlcd/$action.forkchange") and
2263                 unlink "$htmlcd/forkchange";
2264         }
2265
2266         return 0;
2267 }
2268
2269 sub cached_action_page {
2270         my $action = shift;
2271
2272         return undef unless $action && $html_cache_actions{$action} && $html_cache_dir;
2273         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2274         return undef if -e "$htmlcd/changed" || -e "$htmlcd/$action.changed";
2275         return undef unless cached_page_precondition_check($action);
2276         open my $fd, '<', "$htmlcd/$action" or return undef;
2277         binmode $fd;
2278         local $/;
2279         my $cached_page = <$fd>;
2280         close $fd or return undef;
2281         return $cached_page;
2282 }
2283
2284 package Git::Gitweb::CacheFile;
2285
2286 sub TIEHANDLE {
2287         use POSIX qw(:fcntl_h);
2288         my $class = shift;
2289         my $cachefile = shift;
2290
2291         sysopen(my $self, $cachefile, O_WRONLY|O_CREAT|O_EXCL, 0664)
2292                 or return undef;
2293         $$self->{'cachefile'} = $cachefile;
2294         $$self->{'opened'} = 1;
2295         $$self->{'contents'} = '';
2296         return bless $self, $class;
2297 }
2298
2299 sub CLOSE {
2300         my $self = shift;
2301         if ($$self->{'opened'}) {
2302                 $$self->{'opened'} = 0;
2303                 my $result = close $self;
2304                 unlink $$self->{'cachefile'} unless $result;
2305                 return $result;
2306         }
2307         return 0;
2308 }
2309
2310 sub DESTROY {
2311         my $self = shift;
2312         if ($$self->{'opened'}) {
2313                 $self->CLOSE() and unlink $$self->{'cachefile'};
2314         }
2315 }
2316
2317 sub PRINT {
2318         my $self = shift;
2319         @_ = (map {my $x=$_; utf8::encode($x); $x} @_) unless $fcgi_raw_mode;
2320         print $self @_ if $$self->{'opened'};
2321         $$self->{'contents'} .= join('', @_);
2322         return 1;
2323 }
2324
2325 sub PRINTF {
2326         my $self = shift;
2327         my $template = shift;
2328         return $self->PRINT(sprintf $template, @_);
2329 }
2330
2331 sub contents {
2332         my $self = shift;
2333         return $$self->{'contents'};
2334 }
2335
2336 package main;
2337
2338 # Caller is responsible for preserving STDOUT beforehand if needed
2339 sub cached_action_start {
2340         my $action = shift;
2341
2342         return undef unless $html_cache_actions{$action} && $html_cache_dir;
2343         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2344         return undef unless -d $htmlcd;
2345         if (-e "$htmlcd/changed") {
2346                 foreach my $cacheable (keys(%html_cache_actions)) {
2347                         next unless $supported_cache_actions{$cacheable} &&
2348                                     $html_cache_actions{$cacheable};
2349                         my $fd;
2350                         open $fd, '>', "$htmlcd/$cacheable.changed"
2351                         and close $fd;
2352                 }
2353                 unlink "$htmlcd/changed";
2354         }
2355         local *CACHEFILE;
2356         tie *CACHEFILE, 'Git::Gitweb::CacheFile', "$htmlcd/$action.lock"  or return undef;
2357         *STDOUT = *CACHEFILE;
2358         unlink "$htmlcd/$action", "$htmlcd/$action.changed";
2359         return 1;
2360 }
2361
2362 # Caller is responsible for restoring STDOUT afterward if needed
2363 sub cached_action_finish {
2364         my $action = shift;
2365
2366         use File::Spec;
2367
2368         my $obj = tied *STDOUT;
2369         return undef unless ref($obj) eq 'Git::Gitweb::CacheFile';
2370         my $cached_page = $obj->contents;
2371         (my $result = close(STDOUT)) or warn "couldn't close cache file on STDOUT: $!";
2372         # Do not leave STDOUT file descriptor invalid!
2373         local *NULL;
2374         open(NULL, '>', File::Spec->devnull) or die "couldn't open NULL to devnull: $!";
2375         *STDOUT = *NULL;
2376         return $cached_page unless $result;
2377         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2378         return $cached_page unless -d $htmlcd;
2379         unlink "$htmlcd/$action.lock" unless rename "$htmlcd/$action.lock", "$htmlcd/$action";
2380         return $cached_page;
2381 }
2382
2383 my %expand_pi_subs;
2384 BEGIN {%expand_pi_subs = (
2385         'age_string'              => \&age_string,
2386         'age_string_date'         => \&age_string_date,
2387         'age_string_age'          => \&age_string_age,
2388         'compute_timed_interval'  => \&compute_timed_interval,
2389         'compute_commands_count'  => \&compute_commands_count,
2390         'format_lastrefresh_row'  => \&format_lastrefresh_row,
2391 )}
2392
2393 # Expands any <?gitweb...> processing instructions and returns the result
2394 sub expand_gitweb_pi {
2395         my $page = shift;
2396         $page .= '';
2397         my @time_now = gettimeofday();
2398         $page =~ s{<\?gitweb(?:\s+([^\s>]+)([^>]*))?\s*\?>}
2399                   {defined($1) ?
2400                           (ref($expand_pi_subs{$1}) eq 'CODE' ?
2401                                   $expand_pi_subs{$1}->(split(' ',$2), @time_now) :
2402                                   '') :
2403                           '' }goes;
2404         return $page;
2405 }
2406
2407 ## ----------------------------------------------------------------------
2408 ## HTML aware string manipulation
2409
2410 # Try to chop given string on a word boundary between position
2411 # $len and $len+$add_len. If there is no word boundary there,
2412 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
2413 # (marking chopped part) would be longer than given string.
2414 sub chop_str {
2415         my $str = shift;
2416         my $len = shift;
2417         my $add_len = shift || 10;
2418         my $where = shift || 'right'; # 'left' | 'center' | 'right'
2419
2420         # Make sure perl knows it is utf8 encoded so we don't
2421         # cut in the middle of a utf8 multibyte char.
2422         $str = to_utf8($str);
2423
2424         # allow only $len chars, but don't cut a word if it would fit in $add_len
2425         # if it doesn't fit, cut it if it's still longer than the dots we would add
2426         # remove chopped character entities entirely
2427
2428         # when chopping in the middle, distribute $len into left and right part
2429         # return early if chopping wouldn't make string shorter
2430         if ($where eq 'center') {
2431                 return $str if ($len + 5 >= length($str)); # filler is length 5
2432                 $len = int($len/2);
2433         } else {
2434                 return $str if ($len + 4 >= length($str)); # filler is length 4
2435         }
2436
2437         # regexps: ending and beginning with word part up to $add_len
2438         my $endre = qr/.{$len}\w{0,$add_len}/;
2439         my $begre = qr/\w{0,$add_len}.{$len}/;
2440
2441         if ($where eq 'left') {
2442                 $str =~ m/^(.*?)($begre)$/;
2443                 my ($lead, $body) = ($1, $2);
2444                 if (length($lead) > 4) {
2445                         $lead = " ...";
2446                 }
2447                 return "$lead$body";
2448
2449         } elsif ($where eq 'center') {
2450                 $str =~ m/^($endre)(.*)$/;
2451                 my ($left, $str)  = ($1, $2);
2452                 $str =~ m/^(.*?)($begre)$/;
2453                 my ($mid, $right) = ($1, $2);
2454                 if (length($mid) > 5) {
2455                         $mid = " ... ";
2456                 }
2457                 return "$left$mid$right";
2458
2459         } else {
2460                 $str =~ m/^($endre)(.*)$/;
2461                 my $body = $1;
2462                 my $tail = $2;
2463                 if (length($tail) > 4) {
2464                         $tail = "... ";
2465                 }
2466                 return "$body$tail";
2467         }
2468 }
2469
2470 # pass-through email filter, obfuscating it when possible
2471 sub email_obfuscate {
2472         our $email;
2473         my ($str) = @_;
2474         if ($email) {
2475                 $str = $email->escape_html($str);
2476                 # Stock HTML::Email::Obfuscate version likes to produce
2477                 # invalid XHTML...
2478                 $str =~ s#<(/?)B>#<$1b>#g;
2479                 return $str;
2480         } else {
2481                 $str = esc_html($str);
2482                 $str =~ s/@/&#x40;/;
2483                 return $str;
2484         }
2485 }
2486
2487 # takes the same arguments as chop_str, but also wraps a <span> around the
2488 # result with a title attribute if it does get chopped. Additionally, the
2489 # string is HTML-escaped.
2490 sub chop_and_escape_str {
2491         my ($str) = @_;
2492
2493         my $chopped = chop_str(@_);
2494         $str = to_utf8($str);
2495         if ($chopped eq $str) {
2496                 return email_obfuscate($chopped);
2497         } else {
2498                 use bytes;
2499                 $str =~ s/[[:cntrl:]]/?/g;
2500                 return $cgi->span({-title=>$str}, email_obfuscate($chopped));
2501         }
2502 }
2503
2504 # Highlight selected fragments of string, using given CSS class,
2505 # and escape HTML.  It is assumed that fragments do not overlap.
2506 # Regions are passed as list of pairs (array references).
2507 #
2508 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
2509 # '<span class="mark">foo</span>bar'
2510 sub esc_html_hl_regions {
2511         my ($str, $css_class, @sel) = @_;
2512         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
2513         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
2514         return esc_html($str, %opts) unless @sel;
2515
2516         my $out = '';
2517         my $pos = 0;
2518
2519         for my $s (@sel) {
2520                 my ($begin, $end) = @$s;
2521
2522                 # Don't create empty <span> elements.
2523                 next if $end <= $begin;
2524
2525                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
2526                                        %opts);
2527
2528                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
2529                         if ($begin - $pos > 0);
2530                 $out .= $cgi->span({-class => $css_class}, $escaped);
2531
2532                 $pos = $end;
2533         }
2534         $out .= esc_html(substr($str, $pos), %opts)
2535                 if ($pos < length($str));
2536
2537         return $out;
2538 }
2539
2540 # return positions of beginning and end of each match
2541 sub matchpos_list {
2542         my ($str, $regexp) = @_;
2543         return unless (defined $str && defined $regexp);
2544
2545         my @matches;
2546         while ($str =~ /$regexp/g) {
2547                 push @matches, [$-[0], $+[0]];
2548         }
2549         return @matches;
2550 }
2551
2552 # highlight match (if any), and escape HTML
2553 sub esc_html_match_hl {
2554         my ($str, $regexp) = @_;
2555         return esc_html($str) unless defined $regexp;
2556
2557         my @matches = matchpos_list($str, $regexp);
2558         return esc_html($str) unless @matches;
2559
2560         return esc_html_hl_regions($str, 'match', @matches);
2561 }
2562
2563
2564 # highlight match (if any) of shortened string, and escape HTML
2565 sub esc_html_match_hl_chopped {
2566         my ($str, $chopped, $regexp) = @_;
2567         return esc_html_match_hl($str, $regexp) unless defined $chopped;
2568
2569         my @matches = matchpos_list($str, $regexp);
2570         return esc_html($chopped) unless @matches;
2571
2572         # filter matches so that we mark chopped string
2573         my $tail = "... "; # see chop_str
2574         unless ($chopped =~ s/\Q$tail\E$//) {
2575                 $tail = '';
2576         }
2577         my $chop_len = length($chopped);
2578         my $tail_len = length($tail);
2579         my @filtered;
2580
2581         for my $m (@matches) {
2582                 if ($m->[0] > $chop_len) {
2583                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
2584                         last;
2585                 } elsif ($m->[1] > $chop_len) {
2586                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
2587                         last;
2588                 }
2589                 push @filtered, $m;
2590         }
2591
2592         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
2593 }
2594
2595 ## ----------------------------------------------------------------------
2596 ## functions returning short strings
2597
2598 # CSS class for given age epoch value (in seconds)
2599 # and reference time (optional, defaults to now) as second value
2600 sub age_class {
2601         my ($age_epoch, $time_now) = @_;
2602         return "noage" unless defined $age_epoch;
2603         defined $time_now or $time_now = time;
2604         my $age = $time_now - $age_epoch;
2605
2606         if ($age < 60*60*2) {
2607                 return "age0";
2608         } elsif ($age < 60*60*24*2) {
2609                 return "age1";
2610         } else {
2611                 return "age2";
2612         }
2613 }
2614
2615 # convert age epoch in seconds to "nn units ago" string
2616 # reference time used is now unless second argument passed in
2617 # to get the old behavior, pass 0 as the first argument and
2618 # the time in seconds as the second
2619 sub age_string {
2620         my ($age_epoch, $time_now) = @_;
2621         return "unknown" unless defined $age_epoch;
2622         return "<?gitweb age_string $age_epoch?>" if $cache_mode_active;
2623         defined $time_now or $time_now = time;
2624         my $age = $time_now - $age_epoch;
2625         my $age_str;
2626
2627         if ($age > 60*60*24*365*2) {
2628                 $age_str = (int $age/60/60/24/365);
2629                 $age_str .= " years ago";
2630         } elsif ($age > 60*60*24*(365/12)*2) {
2631                 $age_str = int $age/60/60/24/(365/12);
2632                 $age_str .= " months ago";
2633         } elsif ($age > 60*60*24*7*2) {
2634                 $age_str = int $age/60/60/24/7;
2635                 $age_str .= " weeks ago";
2636         } elsif ($age > 60*60*24*2) {
2637                 $age_str = int $age/60/60/24;
2638                 $age_str .= " days ago";
2639         } elsif ($age > 60*60*2) {
2640                 $age_str = int $age/60/60;
2641                 $age_str .= " hours ago";
2642         } elsif ($age > 60*2) {
2643                 $age_str = int $age/60;
2644                 $age_str .= " min ago";
2645         } elsif ($age > 2) {
2646                 $age_str = int $age;
2647                 $age_str .= " sec ago";
2648         } else {
2649                 $age_str .= " right now";
2650         }
2651         return $age_str;
2652 }
2653
2654 # returns age_string if the age is <= 2 weeks otherwise an absolute date
2655 # this is typically shown to the user directly with the age_string_age as a title
2656 sub age_string_date {
2657         my ($age_epoch, $time_now) = @_;
2658         return "unknown" unless defined $age_epoch;
2659         return "<?gitweb age_string_date $age_epoch?>" if $cache_mode_active;
2660         defined $time_now or $time_now = time;
2661         my $age = $time_now - $age_epoch;
2662
2663         if ($age > 60*60*24*7*2) {
2664                 my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($age_epoch);
2665                 return sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2666         } else {
2667                 return age_string($age_epoch, $time_now);
2668         }
2669 }
2670
2671 # returns an absolute date if the age is <= 2 weeks otherwise age_string
2672 # this is typically used for the 'title' attribute so it will show as a tooltip
2673 sub age_string_age {
2674         my ($age_epoch, $time_now) = @_;
2675         return "unknown" unless defined $age_epoch;
2676         return "<?gitweb age_string_age $age_epoch?>" if $cache_mode_active;
2677         defined $time_now or $time_now = time;
2678         my $age = $time_now - $age_epoch;
2679
2680         if ($age > 60*60*24*7*2) {
2681                 return age_string($age_epoch, $time_now);
2682         } else {
2683                 my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($age_epoch);
2684                 return sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2685         }
2686 }
2687
2688 use constant {
2689         S_IFINVALID => 0030000,
2690         S_IFGITLINK => 0160000,
2691 };
2692
2693 # submodule/subproject, a commit object reference
2694 sub S_ISGITLINK {
2695         my $mode = shift;
2696
2697         return (($mode & S_IFMT) == S_IFGITLINK)
2698 }
2699
2700 # convert file mode in octal to symbolic file mode string
2701 sub mode_str {
2702         my $mode = oct shift;
2703
2704         if (S_ISGITLINK($mode)) {
2705                 return 'm---------';
2706         } elsif (S_ISDIR($mode & S_IFMT)) {
2707                 return 'drwxr-xr-x';
2708         } elsif (S_ISLNK($mode)) {
2709                 return 'lrwxrwxrwx';
2710         } elsif (S_ISREG($mode)) {
2711                 # git cares only about the executable bit
2712                 if ($mode & S_IXUSR) {
2713                         return '-rwxr-xr-x';
2714                 } else {
2715                         return '-rw-r--r--';
2716                 };
2717         } else {
2718                 return '----------';
2719         }
2720 }
2721
2722 # convert file mode in octal to file type string
2723 sub file_type {
2724         my $mode = shift;
2725
2726         if ($mode !~ m/^[0-7]+$/) {
2727                 return $mode;
2728         } else {
2729                 $mode = oct $mode;
2730         }
2731
2732         if (S_ISGITLINK($mode)) {
2733                 return "submodule";
2734         } elsif (S_ISDIR($mode & S_IFMT)) {
2735                 return "directory";
2736         } elsif (S_ISLNK($mode)) {
2737                 return "symlink";
2738         } elsif (S_ISREG($mode)) {
2739                 return "file";
2740         } else {
2741                 return "unknown";
2742         }
2743 }
2744
2745 # convert file mode in octal to file type description string
2746 sub file_type_long {
2747         my $mode = shift;
2748
2749         if ($mode !~ m/^[0-7]+$/) {
2750                 return $mode;
2751         } else {
2752                 $mode = oct $mode;
2753         }
2754
2755         if (S_ISGITLINK($mode)) {
2756                 return "submodule";
2757         } elsif (S_ISDIR($mode & S_IFMT)) {
2758                 return "directory";
2759         } elsif (S_ISLNK($mode)) {
2760                 return "symlink";
2761         } elsif (S_ISREG($mode)) {
2762                 if ($mode & S_IXUSR) {
2763                         return "executable";
2764                 } else {
2765                         return "file";
2766                 };
2767         } else {
2768                 return "unknown";
2769         }
2770 }
2771
2772
2773 ## ----------------------------------------------------------------------
2774 ## functions returning short HTML fragments, or transforming HTML fragments
2775 ## which don't belong to other sections
2776
2777 # format line of commit message.
2778 sub format_log_line_html {
2779         my $line = shift;
2780
2781         $line = esc_html($line, -nbsp=>1);
2782         $line =~ s{
2783         \b
2784         (
2785             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2786             # or hadoop-20160921-113441-20-g094fb7d
2787             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2788             [A-Za-z0-9.-]+
2789             (?!\.) # refs can't end with ".", see check_refname_format()
2790             -g[0-9a-fA-F]{7,40}
2791             |
2792             # Just a normal looking Git SHA1
2793             [0-9a-fA-F]{7,40}
2794         )
2795         \b
2796     }{
2797                 $cgi->a({-href => href(action=>"object", hash=>$1),
2798                                         -class => "text"}, $1);
2799         }egx unless $line =~ /^\s*git-svn-id:/;
2800
2801         return $line;
2802 }
2803
2804 # format marker of refs pointing to given object
2805
2806 # the destination action is chosen based on object type and current context:
2807 # - for annotated tags, we choose the tag view unless it's the current view
2808 #   already, in which case we go to shortlog view
2809 # - for other refs, we keep the current view if we're in history, shortlog or
2810 #   log view, and select shortlog otherwise
2811 sub format_ref_marker {
2812         my ($refs, $id) = @_;
2813         my $markers = '';
2814
2815         if (defined $refs->{$id}) {
2816                 foreach my $ref (@{$refs->{$id}}) {
2817                         # this code exploits the fact that non-lightweight tags are the
2818                         # only indirect objects, and that they are the only objects for which
2819                         # we want to use tag instead of shortlog as action
2820                         my ($type, $name) = qw();
2821                         my $indirect = ($ref =~ s/\^\{\}$//);
2822                         # e.g. tags/v2.6.11 or heads/next
2823                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2824                                 $type = $1;
2825                                 $name = $2;
2826                         } else {
2827                                 $type = "ref";
2828                                 $name = $ref;
2829                         }
2830
2831                         my $class = $type;
2832                         $class .= " indirect" if $indirect;
2833
2834                         my $dest_action = "shortlog";
2835
2836                         if ($indirect) {
2837                                 $dest_action = "tag" unless $action eq "tag";
2838                         } elsif ($action =~ /^(history|(short)?log)$/) {
2839                                 $dest_action = $action;
2840                         }
2841
2842                         my $dest = "";
2843                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2844                         $dest .= $ref;
2845
2846                         my $link = $cgi->a({
2847                                 -href => href(
2848                                         action=>$dest_action,
2849                                         hash=>$dest
2850                                 )}, esc_html($name));
2851
2852                         $markers .= "<span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2853                                 $link . "</span>";
2854                 }
2855         }
2856
2857         if ($markers) {
2858                 return '<span class="refs">'. $markers . '</span>';
2859         } else {
2860                 return "";
2861         }
2862 }
2863
2864 # format, perhaps shortened and with markers, title line
2865 sub format_subject_html {
2866         my ($long, $short, $href, $extra) = @_;
2867         $extra = '' unless defined($extra);
2868
2869         if (length($short) < length($long)) {
2870                 use bytes;
2871                 $long =~ s/[[:cntrl:]]/?/g;
2872                 return $cgi->a({-href => $href, -class => "list subject",
2873                                 -title => to_utf8($long)},
2874                        esc_html($short)) . $extra;
2875         } else {
2876                 return $cgi->a({-href => $href, -class => "list subject"},
2877                        esc_html($long)) . $extra;
2878         }
2879 }
2880
2881 # Rather than recomputing the url for an email multiple times, we cache it
2882 # after the first hit. This gives a visible benefit in views where the avatar
2883 # for the same email is used repeatedly (e.g. shortlog).
2884 # The cache is shared by all avatar engines (currently gravatar only), which
2885 # are free to use it as preferred. Since only one avatar engine is used for any
2886 # given page, there's no risk for cache conflicts.
2887 our %avatar_cache = ();
2888
2889 # Compute the picon url for a given email, by using the picon search service over at
2890 # http://www.cs.indiana.edu/picons/search.html
2891 sub picon_url {
2892         my $email = lc shift;
2893         if (!$avatar_cache{$email}) {
2894                 my ($user, $domain) = split('@', $email);
2895                 $avatar_cache{$email} =
2896                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2897                         "$domain/$user/" .
2898                         "users+domains+unknown/up/single";
2899         }
2900         return $avatar_cache{$email};
2901 }
2902
2903 # Compute the gravatar url for a given email, if it's not in the cache already.
2904 # Gravatar stores only the part of the URL before the size, since that's the
2905 # one computationally more expensive. This also allows reuse of the cache for
2906 # different sizes (for this particular engine).
2907 sub gravatar_url {
2908         my $email = lc shift;
2909         my $size = shift;
2910         $avatar_cache{$email} ||=
2911                 "//www.gravatar.com/avatar/" .
2912                         Digest::MD5::md5_hex($email) . "?s=";
2913         return $avatar_cache{$email} . $size;
2914 }
2915
2916 # Insert an avatar for the given $email at the given $size if the feature
2917 # is enabled.
2918 sub git_get_avatar {
2919         my ($email, %opts) = @_;
2920         my $pre_white  = ($opts{-pad_before} ? "&#160;" : "");
2921         my $post_white = ($opts{-pad_after}  ? "&#160;" : "");
2922         $opts{-size} ||= 'default';
2923         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2924         my $url = "";
2925         if ($git_avatar eq 'gravatar') {
2926                 $url = gravatar_url($email, $size);
2927         } elsif ($git_avatar eq 'picon') {
2928                 $url = picon_url($email);
2929         }
2930         # Other providers can be added by extending the if chain, defining $url
2931         # as needed. If no variant puts something in $url, we assume avatars
2932         # are completely disabled/unavailable.
2933         if ($url) {
2934                 return $pre_white .
2935                        "<img width=\"$size\" " .
2936                             "class=\"avatar\" " .
2937                             "src=\"".esc_url($url)."\" " .
2938                             "alt=\"\" " .
2939                        "/>" . $post_white;
2940         } else {
2941                 return "";
2942         }
2943 }
2944
2945 sub format_search_author {
2946         my ($author, $searchtype, $displaytext) = @_;
2947         my $have_search = gitweb_check_feature('search');
2948
2949         if ($have_search) {
2950                 my $performed = "";
2951                 if ($searchtype eq 'author') {
2952                         $performed = "authored";
2953                 } elsif ($searchtype eq 'committer') {
2954                         $performed = "committed";
2955                 }
2956
2957                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2958                                 searchtext=>$author,
2959                                 searchtype=>$searchtype), class=>"list",
2960                                 title=>"Search for commits $performed by $author"},
2961                                 $displaytext);
2962
2963         } else {
2964                 return $displaytext;
2965         }
2966 }
2967
2968 # format the author name of the given commit with the given tag
2969 # the author name is chopped and escaped according to the other
2970 # optional parameters (see chop_str).
2971 sub format_author_html {
2972         my $tag = shift;
2973         my $co = shift;
2974         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2975         return "<$tag class=\"author\">" .
2976                format_search_author($co->{'author_name'}, "author",
2977                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2978                        $author) .
2979                "</$tag>";
2980 }
2981
2982 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2983 sub format_git_diff_header_line {
2984         my $line = shift;
2985         my $diffinfo = shift;
2986         my ($from, $to) = @_;
2987
2988         if ($diffinfo->{'nparents'}) {
2989                 # combined diff
2990                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2991                 if ($to->{'href'}) {
2992                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2993                                          esc_path($to->{'file'}));
2994                 } else { # file was deleted (no href)
2995                         $line .= esc_path($to->{'file'});
2996                 }
2997         } else {
2998                 # "ordinary" diff
2999                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
3000                 if ($from->{'href'}) {
3001                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
3002                                          'a/' . esc_path($from->{'file'}));
3003                 } else { # file was added (no href)
3004                         $line .= 'a/' . esc_path($from->{'file'});
3005                 }
3006                 $line .= ' ';
3007                 if ($to->{'href'}) {
3008                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
3009                                          'b/' . esc_path($to->{'file'}));
3010                 } else { # file was deleted
3011                         $line .= 'b/' . esc_path($to->{'file'});
3012                 }
3013         }
3014
3015         return "<div class=\"diff header\">$line</div>\n";
3016 }
3017
3018 # format extended diff header line, before patch itself
3019 sub format_extended_diff_header_line {
3020         my $line = shift;
3021         my $diffinfo = shift;
3022         my ($from, $to) = @_;
3023
3024         # match <path>
3025         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
3026                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
3027                                        esc_path($from->{'file'}));
3028         }
3029         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
3030                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
3031                                  esc_path($to->{'file'}));
3032         }
3033         # match single <mode>
3034         if ($line =~ m/\s(\d{6})$/) {
3035                 $line .= '<span class="info"> (' .
3036                          file_type_long($1) .
3037                          ')</span>';
3038         }
3039         # match <hash>
3040         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
3041                 # can match only for combined diff
3042                 $line = 'index ';
3043                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3044                         if ($from->{'href'}[$i]) {
3045                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
3046                                                   -class=>"hash"},
3047                                                  substr($diffinfo->{'from_id'}[$i],0,7));
3048                         } else {
3049                                 $line .= '0' x 7;
3050                         }
3051                         # separator
3052                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
3053                 }
3054                 $line .= '..';
3055                 if ($to->{'href'}) {
3056                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
3057                                          substr($diffinfo->{'to_id'},0,7));
3058                 } else {
3059                         $line .= '0' x 7;
3060                 }
3061
3062         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
3063                 # can match only for ordinary diff
3064                 my ($from_link, $to_link);
3065                 if ($from->{'href'}) {
3066                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
3067                                              substr($diffinfo->{'from_id'},0,7));
3068                 } else {
3069                         $from_link = '0' x 7;
3070                 }
3071                 if ($to->{'href'}) {
3072                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
3073                                            substr($diffinfo->{'to_id'},0,7));
3074                 } else {
3075                         $to_link = '0' x 7;
3076                 }
3077                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
3078                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
3079         }
3080
3081         return $line . "<br/>\n";
3082 }
3083
3084 # format from-file/to-file diff header
3085 sub format_diff_from_to_header {
3086         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
3087         my $line;
3088         my $result = '';
3089
3090         $line = $from_line;
3091         #assert($line =~ m/^---/) if DEBUG;
3092         # no extra formatting for "^--- /dev/null"
3093         if (! $diffinfo->{'nparents'}) {
3094                 # ordinary (single parent) diff
3095                 if ($line =~ m!^--- "?a/!) {
3096                         if ($from->{'href'}) {
3097                                 $line = '--- a/' .
3098                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
3099                                                 esc_path($from->{'file'}));
3100                         } else {
3101                                 $line = '--- a/' .
3102                                         esc_path($from->{'file'});
3103                         }
3104                 }
3105                 $result .= qq!<div class="diff from_file">$line</div>\n!;
3106
3107         } else {
3108                 # combined diff (merge commit)
3109                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3110                         if ($from->{'href'}[$i]) {
3111                                 $line = '--- ' .
3112                                         $cgi->a({-href=>href(action=>"blobdiff",
3113                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
3114                                                              hash_parent_base=>$parents[$i],
3115                                                              file_parent=>$from->{'file'}[$i],
3116                                                              hash=>$diffinfo->{'to_id'},
3117                                                              hash_base=>$hash,
3118                                                              file_name=>$to->{'file'}),
3119                                                  -class=>"path",
3120                                                  -title=>"diff" . ($i+1)},
3121                                                 $i+1) .
3122                                         '/' .
3123                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
3124                                                 esc_path($from->{'file'}[$i]));
3125                         } else {
3126                                 $line = '--- /dev/null';
3127                         }
3128                         $result .= qq!<div class="diff from_file">$line</div>\n!;
3129                 }
3130         }
3131
3132         $line = $to_line;
3133         #assert($line =~ m/^\+\+\+/) if DEBUG;
3134         # no extra formatting for "^+++ /dev/null"
3135         if ($line =~ m!^\+\+\+ "?b/!) {
3136                 if ($to->{'href'}) {
3137                         $line = '+++ b/' .
3138                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
3139                                         esc_path($to->{'file'}));
3140                 } else {
3141                         $line = '+++ b/' .
3142                                 esc_path($to->{'file'});
3143                 }
3144         }
3145         $result .= qq!<div class="diff to_file">$line</div>\n!;
3146
3147         return $result;
3148 }
3149
3150 # create note for patch simplified by combined diff
3151 sub format_diff_cc_simplified {
3152         my ($diffinfo, @parents) = @_;
3153         my $result = '';
3154
3155         $result .= "<div class=\"diff header\">" .
3156                    "diff --cc ";
3157         if (!is_deleted($diffinfo)) {
3158                 $result .= $cgi->a({-href => href(action=>"blob",
3159                                                   hash_base=>$hash,
3160                                                   hash=>$diffinfo->{'to_id'},
3161                                                   file_name=>$diffinfo->{'to_file'}),
3162                                     -class => "path"},
3163                                    esc_path($diffinfo->{'to_file'}));
3164         } else {
3165                 $result .= esc_path($diffinfo->{'to_file'});
3166         }
3167         $result .= "</div>\n" . # class="diff header"
3168                    "<div class=\"diff nodifferences\">" .
3169                    "Simple merge" .
3170                    "</div>\n"; # class="diff nodifferences"
3171
3172         return $result;
3173 }
3174
3175 sub diff_line_class {
3176         my ($line, $from, $to) = @_;
3177
3178         # ordinary diff
3179         my $num_sign = 1;
3180         # combined diff
3181         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
3182                 $num_sign = scalar @{$from->{'href'}};
3183         }
3184
3185         my @diff_line_classifier = (
3186                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
3187                 { regexp => qr/^\\/,               class => "incomplete"  },
3188                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
3189                 # classifier for context must come before classifier add/rem,
3190                 # or we would have to use more complicated regexp, for example
3191                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
3192                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
3193                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
3194         );
3195         for my $clsfy (@diff_line_classifier) {
3196                 return $clsfy->{'class'}
3197                         if ($line =~ $clsfy->{'regexp'});
3198         }
3199
3200         # fallback
3201         return "";
3202 }
3203
3204 # assumes that $from and $to are defined and correctly filled,
3205 # and that $line holds a line of chunk header for unified diff
3206 sub format_unidiff_chunk_header {
3207         my ($line, $from, $to) = @_;
3208
3209         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
3210                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
3211
3212         $from_lines = 0 unless defined $from_lines;
3213         $to_lines   = 0 unless defined $to_lines;
3214
3215         if ($from->{'href'}) {
3216                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
3217                                      -class=>"list"}, $from_text);
3218         }
3219         if ($to->{'href'}) {
3220                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
3221                                      -class=>"list"}, $to_text);
3222         }
3223         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
3224                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
3225         return $line;
3226 }
3227
3228 # assumes that $from and $to are defined and correctly filled,
3229 # and that $line holds a line of chunk header for combined diff
3230 sub format_cc_diff_chunk_header {
3231         my ($line, $from, $to) = @_;
3232
3233         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
3234         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
3235
3236         @from_text = split(' ', $ranges);
3237         for (my $i = 0; $i < @from_text; ++$i) {
3238                 ($from_start[$i], $from_nlines[$i]) =
3239                         (split(',', substr($from_text[$i], 1)), 0);
3240         }
3241
3242         $to_text   = pop @from_text;
3243         $to_start  = pop @from_start;
3244         $to_nlines = pop @from_nlines;
3245
3246         $line = "<span class=\"chunk_info\">$prefix ";
3247         for (my $i = 0; $i < @from_text; ++$i) {
3248                 if ($from->{'href'}[$i]) {
3249                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
3250                                           -class=>"list"}, $from_text[$i]);
3251                 } else {
3252                         $line .= $from_text[$i];
3253                 }
3254                 $line .= " ";
3255         }
3256         if ($to->{'href'}) {
3257                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
3258                                   -class=>"list"}, $to_text);
3259         } else {
3260                 $line .= $to_text;
3261         }
3262         $line .= " $prefix</span>" .
3263                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
3264         return $line;
3265 }
3266
3267 # process patch (diff) line (not to be used for diff headers),
3268 # returning HTML-formatted (but not wrapped) line.
3269 # If the line is passed as a reference, it is treated as HTML and not
3270 # esc_html()'ed.
3271 sub format_diff_line {
3272         my ($line, $diff_class, $from, $to) = @_;
3273
3274         if (ref($line)) {
3275                 $line = $$line;
3276         } else {
3277                 chomp $line;
3278                 $line = untabify($line);
3279
3280                 if ($from && $to && $line =~ m/^\@{2} /) {
3281                         $line = format_unidiff_chunk_header($line, $from, $to);
3282                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
3283                         $line = format_cc_diff_chunk_header($line, $from, $to);
3284                 } else {
3285                         $line = esc_html($line, -nbsp=>1);
3286                 }
3287         }
3288
3289         my $diff_classes = "diff diff_body";
3290         $diff_classes .= " $diff_class" if ($diff_class);
3291         $line = "<div class=\"$diff_classes\">$line</div>\n";
3292
3293         return $line;
3294 }
3295
3296 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
3297 # linked.  Pass the hash of the tree/commit to snapshot.
3298 sub format_snapshot_links {
3299         my ($hash) = @_;
3300         my $num_fmts = @snapshot_fmts;
3301         if ($num_fmts > 1) {
3302                 # A parenthesized list of links bearing format names.
3303                 # e.g. "snapshot (_tar.gz_ _zip_)"
3304                 return "snapshot (" . join(' ', map
3305                         $cgi->a({
3306                                 -href => href(
3307                                         action=>"snapshot",
3308                                         hash=>$hash,
3309                                         snapshot_format=>$_
3310                                 )
3311                         }, $known_snapshot_formats{$_}{'display'})
3312                 , @snapshot_fmts) . ")";
3313         } elsif ($num_fmts == 1) {
3314                 # A single "snapshot" link whose tooltip bears the format name.
3315                 # i.e. "_snapshot_"
3316                 my ($fmt) = @snapshot_fmts;
3317                 return
3318                         $cgi->a({
3319                                 -href => href(
3320                                         action=>"snapshot",
3321                                         hash=>$hash,
3322                                         snapshot_format=>$fmt
3323                                 ),
3324                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
3325                         }, "snapshot");
3326         } else { # $num_fmts == 0
3327                 return undef;
3328         }
3329 }
3330
3331 ## ......................................................................
3332 ## functions returning values to be passed, perhaps after some
3333 ## transformation, to other functions; e.g. returning arguments to href()
3334
3335 # returns hash to be passed to href to generate gitweb URL
3336 # in -title key it returns description of link
3337 sub get_feed_info {
3338         my $format = shift || 'Atom';
3339         my %res = (action => lc($format));
3340         my $matched_ref = 0;
3341
3342         # feed links are possible only for project views
3343         return unless (defined $project);
3344         # some views should link to OPML, or to generic project feed,
3345         # or don't have specific feed yet (so they should use generic)
3346         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
3347
3348         my $branch = undef;
3349         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
3350         # (fullname) to differentiate from tag links; this also makes
3351         # possible to detect branch links
3352         for my $ref (get_branch_refs()) {
3353                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
3354                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
3355                         $branch = $1;
3356                         $matched_ref = $ref;
3357                         last;
3358                 }
3359         }
3360         # find log type for feed description (title)
3361         my $type = 'log';
3362         if (defined $file_name) {
3363                 $type  = "history of $file_name";
3364                 $type .= "/" if ($action eq 'tree');
3365                 $type .= " on '$branch'" if (defined $branch);
3366         } else {
3367                 $type = "log of $branch" if (defined $branch);
3368         }
3369
3370         $res{-title} = $type;
3371         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
3372         $res{'file_name'} = $file_name;
3373
3374         return %res;
3375 }
3376
3377 ## ----------------------------------------------------------------------
3378 ## git utility subroutines, invoking git commands
3379
3380 # returns path to the core git executable and the --git-dir parameter as list
3381 sub git_cmd {
3382         $number_of_git_cmds++;
3383         return $GIT, '--git-dir='.$git_dir;
3384 }
3385
3386 # opens a "-|" cmd pipe handle with 2>/dev/null and returns it
3387 sub cmd_pipe {
3388
3389         # In order to be compatible with FCGI mode we must use POSIX
3390         # and access the STDERR_FILENO file descriptor directly
3391
3392         use POSIX qw(STDERR_FILENO dup dup2);
3393
3394         open(my $null, '>', File::Spec->devnull) or die "couldn't open devnull: $!";
3395         (my $saveerr = dup(STDERR_FILENO)) or die "couldn't dup STDERR: $!";
3396         my $dup2ok = dup2(fileno($null), STDERR_FILENO);
3397         close($null) or !$dup2ok or die "couldn't close NULL: $!";
3398         $dup2ok or POSIX::close($saveerr), die "couldn't dup NULL to STDERR: $!";
3399         my $result = open(my $fd, "-|", @_);
3400         $dup2ok = dup2($saveerr, STDERR_FILENO);
3401         POSIX::close($saveerr) or !$dup2ok or die "couldn't close SAVEERR: $!";
3402         $dup2ok or die "couldn't dup SAVERR to STDERR: $!";
3403
3404         return $result ? $fd : undef;
3405 }
3406
3407 # opens a "-|" git_cmd pipe handle with 2>/dev/null and returns it
3408 sub git_cmd_pipe {
3409         return cmd_pipe git_cmd(), @_;
3410 }
3411
3412 # quote the given arguments for passing them to the shell
3413 # quote_command("command", "arg 1", "arg with ' and ! characters")
3414 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
3415 # Try to avoid using this function wherever possible.
3416 sub quote_command {
3417         return join(' ',
3418                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
3419 }
3420
3421 # get HEAD ref of given project as hash
3422 sub git_get_head_hash {
3423         return git_get_full_hash(shift, 'HEAD');
3424 }
3425
3426 sub git_get_full_hash {
3427         return git_get_hash(@_);
3428 }
3429
3430 sub git_get_short_hash {
3431         return git_get_hash(@_, '--short=7');
3432 }
3433
3434 sub git_get_hash {
3435         my ($project, $hash, @options) = @_;
3436         my $o_git_dir = $git_dir;
3437         my $retval = undef;
3438         $git_dir = "$projectroot/$project";
3439         if (defined(my $fd = git_cmd_pipe 'rev-parse',
3440             '--verify', '-q', @options, $hash)) {
3441                 $retval = <$fd>;
3442                 chomp $retval if defined $retval;
3443                 close $fd;
3444         }
3445         if (defined $o_git_dir) {
3446                 $git_dir = $o_git_dir;
3447         }
3448         return $retval;
3449 }
3450
3451 # get type of given object
3452 sub git_get_type {
3453         my $hash = shift;
3454
3455         defined(my $fd = git_cmd_pipe "cat-file", '-t', $hash) or return;
3456         my $type = <$fd>;
3457         close $fd or return;
3458         chomp $type;
3459         return $type;
3460 }
3461
3462 # repository configuration
3463 our $config_file = '';
3464 our %config;
3465
3466 # store multiple values for single key as anonymous array reference
3467 # single values stored directly in the hash, not as [ <value> ]
3468 sub hash_set_multi {
3469         my ($hash, $key, $value) = @_;
3470
3471         if (!exists $hash->{$key}) {
3472                 $hash->{$key} = $value;
3473         } elsif (!ref $hash->{$key}) {
3474                 $hash->{$key} = [ $hash->{$key}, $value ];
3475         } else {
3476                 push @{$hash->{$key}}, $value;
3477         }
3478 }
3479
3480 # return hash of git project configuration
3481 # optionally limited to some section, e.g. 'gitweb'
3482 sub git_parse_project_config {
3483         my $section_regexp = shift;
3484         my %config;
3485
3486         local $/ = "\0";
3487
3488         defined(my $fh = git_cmd_pipe "config", '-z', '-l')
3489                 or return;
3490
3491         while (my $keyval = to_utf8(scalar <$fh>)) {
3492                 chomp $keyval;
3493                 my ($key, $value) = split(/\n/, $keyval, 2);
3494
3495                 hash_set_multi(\%config, $key, $value)
3496                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
3497         }
3498         close $fh;
3499
3500         return %config;
3501 }
3502
3503 # convert config value to boolean: 'true' or 'false'
3504 # no value, number > 0, 'true' and 'yes' values are true
3505 # rest of values are treated as false (never as error)
3506 sub config_to_bool {
3507         my $val = shift;
3508
3509         return 1 if !defined $val;             # section.key
3510
3511         # strip leading and trailing whitespace
3512         $val =~ s/^\s+//;
3513         $val =~ s/\s+$//;
3514
3515         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
3516                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
3517 }
3518
3519 # convert config value to simple decimal number
3520 # an optional value suffix of 'k', 'm', or 'g' will cause the value
3521 # to be multiplied by 1024, 1048576, or 1073741824
3522 sub config_to_int {
3523         my $val = shift;
3524
3525         # strip leading and trailing whitespace
3526         $val =~ s/^\s+//;
3527         $val =~ s/\s+$//;
3528
3529         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
3530                 $unit = lc($unit);
3531                 # unknown unit is treated as 1
3532                 return $num * ($unit eq 'g' ? 1073741824 :
3533                                $unit eq 'm' ?    1048576 :
3534                                $unit eq 'k' ?       1024 : 1);
3535         }
3536         return $val;
3537 }
3538
3539 # convert config value to array reference, if needed
3540 sub config_to_multi {
3541         my $val = shift;
3542
3543         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
3544 }
3545
3546 sub git_get_project_config {
3547         my ($key, $type) = @_;
3548
3549         return unless defined $git_dir;
3550
3551         # key sanity check
3552         return unless ($key);
3553         # only subsection, if exists, is case sensitive,
3554         # and not lowercased by 'git config -z -l'
3555         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
3556                 $lo =~ s/_//g;
3557                 $key = join(".", lc($hi), $mi, lc($lo));
3558                 return if ($lo =~ /\W/ || $hi =~ /\W/);
3559         } else {
3560                 $key = lc($key);
3561                 $key =~ s/_//g;
3562                 return if ($key =~ /\W/);
3563         }
3564         $key =~ s/^gitweb\.//;
3565
3566         # type sanity check
3567         if (defined $type) {
3568                 $type =~ s/^--//;
3569                 $type = undef
3570                         unless ($type eq 'bool' || $type eq 'int');
3571         }
3572
3573         # get config
3574         if (!defined $config_file ||
3575             $config_file ne "$git_dir/config") {
3576                 %config = git_parse_project_config('gitweb');
3577                 $config_file = "$git_dir/config";
3578         }
3579
3580         # check if config variable (key) exists
3581         return unless exists $config{"gitweb.$key"};
3582
3583         # ensure given type
3584         if (!defined $type) {
3585                 return $config{"gitweb.$key"};
3586         } elsif ($type eq 'bool') {
3587                 # backward compatibility: 'git config --bool' returns true/false
3588                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
3589         } elsif ($type eq 'int') {
3590                 return config_to_int($config{"gitweb.$key"});
3591         }
3592         return $config{"gitweb.$key"};
3593 }
3594
3595 # get hash of given path at given ref
3596 sub git_get_hash_by_path {
3597         my $base = shift;
3598         my $path = shift || return undef;
3599         my $type = shift;
3600
3601         $path =~ s,/+$,,;
3602
3603         defined(my $fd = git_cmd_pipe "ls-tree", $base, "--", $path)
3604                 or die_error(500, "Open git-ls-tree failed");
3605         my $line = to_utf8(scalar <$fd>);
3606         close $fd or return undef;
3607
3608         if (!defined $line) {
3609                 # there is no tree or hash given by $path at $base
3610                 return undef;
3611         }
3612
3613         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3614         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
3615         if (defined $type && $type ne $2) {
3616                 # type doesn't match
3617                 return undef;
3618         }
3619         return $3;
3620 }
3621
3622 # get path of entry with given hash at given tree-ish (ref)
3623 # used to get 'from' filename for combined diff (merge commit) for renames
3624 sub git_get_path_by_hash {
3625         my $base = shift || return;
3626         my $hash = shift || return;
3627
3628         local $/ = "\0";
3629
3630         defined(my $fd = git_cmd_pipe "ls-tree", '-r', '-t', '-z', $base)
3631                 or return undef;
3632         while (my $line = to_utf8(scalar <$fd>)) {
3633                 chomp $line;
3634
3635                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
3636                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
3637                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
3638                         close $fd;
3639                         return $1;
3640                 }
3641         }
3642         close $fd;
3643         return undef;
3644 }
3645
3646 ## ......................................................................
3647 ## git utility functions, directly accessing git repository
3648
3649 # get the value of config variable either from file named as the variable
3650 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
3651 # configuration variable in the repository config file.
3652 sub git_get_file_or_project_config {
3653         my ($path, $name) = @_;
3654
3655         $git_dir = "$projectroot/$path";
3656         open my $fd, '<', "$git_dir/$name"
3657                 or return git_get_project_config($name);
3658         my $conf = to_utf8(scalar <$fd>);
3659         close $fd;
3660         if (defined $conf) {
3661                 chomp $conf;
3662         }
3663         return $conf;
3664 }
3665
3666 sub git_get_project_description {
3667         my $path = shift;
3668         return git_get_file_or_project_config($path, 'description');
3669 }
3670
3671 sub git_get_project_category {
3672         my $path = shift;
3673         return git_get_file_or_project_config($path, 'category');
3674 }
3675
3676
3677 # supported formats:
3678 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
3679 #   - if its contents is a number, use it as tag weight,
3680 #   - otherwise add a tag with weight 1
3681 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
3682 #   the same value multiple times increases tag weight
3683 # * `gitweb.ctag' multi-valued repo config variable
3684 sub git_get_project_ctags {
3685         my $project = shift;
3686         my $ctags = {};
3687
3688         $git_dir = "$projectroot/$project";
3689         if (opendir my $dh, "$git_dir/ctags") {
3690                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
3691                 foreach my $tagfile (@files) {
3692                         open my $ct, '<', $tagfile
3693                                 or next;
3694                         my $val = <$ct>;
3695                         chomp $val if $val;
3696                         close $ct;
3697
3698                         (my $ctag = $tagfile) =~ s#.*/##;
3699                         $ctag = to_utf8($ctag);
3700                         if ($val =~ /^\d+$/) {
3701                                 $ctags->{$ctag} = $val;
3702                         } else {
3703                                 $ctags->{$ctag} = 1;
3704                         }
3705                 }
3706                 closedir $dh;
3707
3708         } elsif (open my $fh, '<', "$git_dir/ctags") {
3709                 while (my $line = to_utf8(scalar <$fh>)) {
3710                         chomp $line;
3711                         $ctags->{$line}++ if $line;
3712                 }
3713                 close $fh;
3714
3715         } else {
3716                 my $taglist = config_to_multi(git_get_project_config('ctag'));
3717                 foreach my $tag (@$taglist) {
3718                         $ctags->{$tag}++;
3719                 }
3720         }
3721
3722         return $ctags;
3723 }
3724
3725 # return hash, where keys are content tags ('ctags'),
3726 # and values are sum of weights of given tag in every project
3727 sub git_gather_all_ctags {
3728         my $projects = shift;
3729         my $ctags = {};
3730
3731         foreach my $p (@$projects) {
3732                 foreach my $ct (keys %{$p->{'ctags'}}) {
3733                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
3734                 }
3735         }
3736
3737         return $ctags;
3738 }
3739
3740 sub git_populate_project_tagcloud {
3741         my ($ctags, $action) = @_;
3742
3743         # First, merge different-cased tags; tags vote on casing
3744         my %ctags_lc;
3745         foreach (keys %$ctags) {
3746                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3747                 if (not $ctags_lc{lc $_}->{topcount}
3748                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3749                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3750                         $ctags_lc{lc $_}->{topname} = $_;
3751                 }
3752         }
3753
3754         my $cloud;
3755         my $matched = $input_params{'ctag_filter'};
3756         if (eval { require HTML::TagCloud; 1; }) {
3757                 $cloud = HTML::TagCloud->new;
3758                 foreach my $ctag (sort keys %ctags_lc) {
3759                         # Pad the title with spaces so that the cloud looks
3760                         # less crammed.
3761                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3762                         $title =~ s/ /&#160;/g;
3763                         $title =~ s/^/&#160;/g;
3764                         $title =~ s/$/&#160;/g;
3765                         if (defined $matched && $matched eq $ctag) {
3766                                 $title = qq(<span class="match">$title</span>);
3767                         }
3768                         $cloud->add($title, href(-replay=>1, action=>$action, ctag_filter=>$ctag),
3769                                     $ctags_lc{$ctag}->{count});
3770                 }
3771         } else {
3772                 $cloud = {};
3773                 foreach my $ctag (keys %ctags_lc) {
3774                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3775                         if (defined $matched && $matched eq $ctag) {
3776                                 $title = qq(<span class="match">$title</span>);
3777                         }
3778                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3779                         $cloud->{$ctag}{ctag} =
3780                                 $cgi->a({-href=>href(-replay=>1, action=>$action, ctag_filter=>$ctag)}, $title);
3781                 }
3782         }
3783         return $cloud;
3784 }
3785
3786 sub git_show_project_tagcloud {
3787         my ($cloud, $count) = @_;
3788         if (ref $cloud eq 'HTML::TagCloud') {
3789                 return $cloud->html_and_css($count);
3790         } else {
3791                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3792                 return
3793                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3794                         join (', ', map {
3795                                 $cloud->{$_}->{'ctag'}
3796                         } splice(@tags, 0, $count)) .
3797                         '</div>';
3798         }
3799 }
3800
3801 sub git_get_project_url_list {
3802         my $path = shift;
3803
3804         $git_dir = "$projectroot/$path";
3805         open my $fd, '<', "$git_dir/cloneurl"
3806                 or return wantarray ?
3807                 @{ config_to_multi(git_get_project_config('url')) } :
3808                    config_to_multi(git_get_project_config('url'));
3809         my @git_project_url_list = map { chomp; to_utf8($_) } <$fd>;
3810         close $fd;
3811
3812         return wantarray ? @git_project_url_list : \@git_project_url_list;
3813 }
3814
3815 sub git_get_projects_list {
3816         my $filter = shift || '';
3817         my $paranoid = shift;
3818         my @list;
3819
3820         if (-d $projects_list) {
3821                 # search in directory
3822                 my $dir = $projects_list;
3823                 # remove the trailing "/"
3824                 $dir =~ s!/+$!!;
3825                 my $pfxlen = length("$dir");
3826                 my $pfxdepth = ($dir =~ tr!/!!);
3827                 # when filtering, search only given subdirectory
3828                 if ($filter && !$paranoid) {
3829                         $dir .= "/$filter";
3830                         $dir =~ s!/+$!!;
3831                 }
3832
3833                 File::Find::find({
3834                         follow_fast => 1, # follow symbolic links
3835                         follow_skip => 2, # ignore duplicates
3836                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3837                         wanted => sub {
3838                                 # global variables
3839                                 our $project_maxdepth;
3840                                 our $projectroot;
3841                                 # skip project-list toplevel, if we get it.
3842                                 return if (m!^[/.]$!);
3843                                 # only directories can be git repositories
3844                                 return unless (-d $_);
3845                                 # don't traverse too deep (Find is super slow on os x)
3846                                 # $project_maxdepth excludes depth of $projectroot
3847                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3848                                         $File::Find::prune = 1;
3849                                         return;
3850                                 }
3851
3852                                 my $path = substr($File::Find::name, $pfxlen + 1);
3853                                 # paranoidly only filter here
3854                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3855                                         next;
3856                                 }
3857                                 # we check related file in $projectroot
3858                                 if (check_export_ok("$projectroot/$path")) {
3859                                         push @list, { path => $path };
3860                                         $File::Find::prune = 1;
3861                                 }
3862                         },
3863                 }, "$dir");
3864
3865         } elsif (-f $projects_list) {
3866                 # read from file(url-encoded):
3867                 # 'git%2Fgit.git Linus+Torvalds'
3868                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3869                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3870                 open my $fd, '<', $projects_list or return;
3871         PROJECT:
3872                 while (my $line = <$fd>) {
3873                         chomp $line;
3874                         my ($path, $owner) = split ' ', $line;
3875                         $path = unescape($path);
3876                         $owner = unescape($owner);
3877                         if (!defined $path) {
3878                                 next;
3879                         }
3880                         # if $filter is rpovided, check if $path begins with $filter
3881                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3882                                 next;
3883                         }
3884                         if (check_export_ok("$projectroot/$path")) {
3885                                 my $pr = {
3886                                         path => $path
3887                                 };
3888                                 if ($owner) {
3889                                         $pr->{'owner'} = to_utf8($owner);
3890                                 }
3891                                 push @list, $pr;
3892                         }
3893                 }
3894                 close $fd;
3895         }
3896         return @list;
3897 }
3898
3899 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3900 # as side effects it sets 'forks' field to list of forks for forked projects
3901 sub filter_forks_from_projects_list {
3902         my $projects = shift;
3903
3904         my %trie; # prefix tree of directories (path components)
3905         # generate trie out of those directories that might contain forks
3906         foreach my $pr (@$projects) {
3907                 my $path = $pr->{'path'};
3908                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3909                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3910                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3911                 next unless (-d "$projectroot/$path"); # containing directory exists
3912                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3913
3914                 # add to trie
3915                 my @dirs = split('/', $path);
3916                 # walk the trie, until either runs out of components or out of trie
3917                 my $ref = \%trie;
3918                 while (scalar @dirs &&
3919                        exists($ref->{$dirs[0]})) {
3920                         $ref = $ref->{shift @dirs};
3921                 }
3922                 # create rest of trie structure from rest of components
3923                 foreach my $dir (@dirs) {
3924                         $ref = $ref->{$dir} = {};
3925                 }
3926                 # create end marker, store $pr as a data
3927                 $ref->{''} = $pr if (!exists $ref->{''});
3928         }
3929
3930         # filter out forks, by finding shortest prefix match for paths
3931         my @filtered;
3932  PROJECT:
3933         foreach my $pr (@$projects) {
3934                 # trie lookup
3935                 my $ref = \%trie;
3936         DIR:
3937                 foreach my $dir (split('/', $pr->{'path'})) {
3938                         if (exists $ref->{''}) {
3939                                 # found [shortest] prefix, is a fork - skip it
3940                                 push @{$ref->{''}{'forks'}}, $pr;
3941                                 next PROJECT;
3942                         }
3943                         if (!exists $ref->{$dir}) {
3944                                 # not in trie, cannot have prefix, not a fork
3945                                 push @filtered, $pr;
3946                                 next PROJECT;
3947                         }
3948                         # If the dir is there, we just walk one step down the trie.
3949                         $ref = $ref->{$dir};
3950                 }
3951                 # we ran out of trie
3952                 # (shouldn't happen: it's either no match, or end marker)
3953                 push @filtered, $pr;
3954         }
3955
3956         return @filtered;
3957 }
3958
3959 # note: fill_project_list_info must be run first,
3960 # for 'descr_long' and 'ctags' to be filled
3961 sub search_projects_list {
3962         my ($projlist, %opts) = @_;
3963         my $tagfilter  = $opts{'tagfilter'};
3964         my $search_re = $opts{'search_regexp'};
3965
3966         return @$projlist
3967                 unless ($tagfilter || $search_re);
3968
3969         # searching projects require filling to be run before it;
3970         fill_project_list_info($projlist,
3971                                $tagfilter  ? 'ctags' : (),
3972                                $search_re ? ('path', 'descr') : ());
3973         my @projects;
3974  PROJECT:
3975         foreach my $pr (@$projlist) {
3976
3977                 if ($tagfilter) {
3978                         next unless ref($pr->{'ctags'}) eq 'HASH';
3979                         next unless
3980                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3981                 }
3982
3983                 if ($search_re) {
3984                         my $path = $pr->{'path'};
3985                         $path =~ s/\.git$//; # should not be included in search
3986                         next unless
3987                                 $path =~ /$search_re/ ||
3988                                 $pr->{'descr_long'} =~ /$search_re/;
3989                 }
3990
3991                 push @projects, $pr;
3992         }
3993
3994         return @projects;
3995 }
3996
3997 our $gitweb_project_owner = undef;
3998 sub git_get_project_list_from_file {
3999
4000         return if (defined $gitweb_project_owner);
4001
4002         $gitweb_project_owner = {};
4003         # read from file (url-encoded):
4004         # 'git%2Fgit.git Linus+Torvalds'
4005         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
4006         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
4007         if (-f $projects_list) {
4008                 open(my $fd, '<', $projects_list);
4009                 while (my $line = <$fd>) {
4010                         chomp $line;
4011                         my ($pr, $ow) = split ' ', $line;
4012                         $pr = unescape($pr);
4013                         $ow = unescape($ow);
4014                         $gitweb_project_owner->{$pr} = to_utf8($ow);
4015                 }
4016                 close $fd;
4017         }
4018 }
4019
4020 sub git_get_project_owner {
4021         my $proj = shift;
4022         my $owner;
4023
4024         return undef unless $proj;
4025         $git_dir = "$projectroot/$proj";
4026
4027         if (defined $project && $proj eq $project) {
4028                 $owner = git_get_project_config('owner');
4029         }
4030         if (!defined $owner && !defined $gitweb_project_owner) {
4031                 git_get_project_list_from_file();
4032         }
4033         if (!defined $owner && exists $gitweb_project_owner->{$proj}) {
4034                 $owner = $gitweb_project_owner->{$proj};
4035         }
4036         if (!defined $owner && (!defined $project || $proj ne $project)) {
4037                 $owner = git_get_project_config('owner');
4038         }
4039         if (!defined $owner) {
4040                 $owner = get_file_owner("$git_dir");
4041         }
4042
4043         return $owner;
4044 }
4045
4046 sub parse_activity_date {
4047         my $dstr = shift;
4048
4049         if ($dstr =~ /^\s*([-+]?\d+)(?:\s+([-+]\d{4}))?\s*$/) {
4050                 # Unix timestamp
4051                 return 0 + $1;
4052         }
4053         if ($dstr =~ /^\s*(\d{4})-(\d{2})-(\d{2})[Tt _](\d{1,2}):(\d{2}):(\d{2})(?:[ _]?([Zz]|(?:[-+]\d{1,2}:?\d{2})))?\s*$/) {
4054                 my ($Y,$m,$d,$H,$M,$S,$z) = ($1,$2,$3,$4,$5,$6,$7||'');
4055                 my $seconds = timegm(0+$S, 0+$M, 0+$H, 0+$d, $m-1, $Y-1900);
4056                 defined($z) && $z ne '' or $z = 'Z';
4057                 $z =~ s/://;
4058                 substr($z,1,0) = '0' if length($z) == 4;
4059                 my $off = 0;
4060                 if (uc($z) ne 'Z') {
4061                         $off = 60 * (60 * (0+substr($z,1,2)) + (0+substr($z,3,2)));
4062                         $off = -$off if substr($z,0,1) eq '-';
4063                 }
4064                 return $seconds - $off;
4065         }
4066         return undef;
4067 }
4068
4069 # If $quick is true only look at $lastactivity_file
4070 sub git_get_last_activity {
4071         my ($path, $quick) = @_;
4072         my $fd;
4073
4074         $git_dir = "$projectroot/$path";
4075         if ($lastactivity_file && open($fd, "<", "$git_dir/$lastactivity_file")) {
4076                 my $activity = <$fd>;
4077                 close $fd;
4078                 return (undef) unless defined $activity;
4079                 chomp $activity;
4080                 return (undef) if $activity eq '';
4081                 if (my $timestamp = parse_activity_date($activity)) {
4082                         return ($timestamp);
4083                 }
4084         }
4085         return (undef) if $quick;
4086         defined($fd = git_cmd_pipe 'for-each-ref',
4087              '--format=%(committer)',
4088              '--sort=-committerdate',
4089              '--count=1',
4090              map { "refs/$_" } get_branch_refs ()) or return;
4091         my $most_recent = <$fd>;
4092         close $fd or return (undef);
4093         if (defined $most_recent &&
4094             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
4095                 my $timestamp = $1;
4096                 return ($timestamp);
4097         }
4098         return (undef);
4099 }
4100
4101 # Implementation note: when a single remote is wanted, we cannot use 'git
4102 # remote show -n' because that command always work (assuming it's a remote URL
4103 # if it's not defined), and we cannot use 'git remote show' because that would
4104 # try to make a network roundtrip. So the only way to find if that particular
4105 # remote is defined is to walk the list provided by 'git remote -v' and stop if
4106 # and when we find what we want.
4107 sub git_get_remotes_list {
4108         my $wanted = shift;
4109         my %remotes = ();
4110
4111         my $fd = git_cmd_pipe 'remote', '-v';
4112         return unless $fd;
4113         while (my $remote = to_utf8(scalar <$fd>)) {
4114                 chomp $remote;
4115                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
4116                 next if $wanted and not $remote eq $wanted;
4117                 my ($url, $key) = ($1, $2);
4118
4119                 $remotes{$remote} ||= { 'heads' => [] };
4120                 $remotes{$remote}{$key} = $url;
4121         }
4122         close $fd or return;
4123         return wantarray ? %remotes : \%remotes;
4124 }
4125
4126 # Takes a hash of remotes as first parameter and fills it by adding the
4127 # available remote heads for each of the indicated remotes.
4128 sub fill_remote_heads {
4129         my $remotes = shift;
4130         my @heads = map { "remotes/$_" } keys %$remotes;
4131         my @remoteheads = git_get_heads_list(undef, @heads);
4132         foreach my $remote (keys %$remotes) {
4133                 $remotes->{$remote}{'heads'} = [ grep {
4134                         $_->{'name'} =~ s!^$remote/!!
4135                         } @remoteheads ];
4136         }
4137 }
4138
4139 sub git_get_references {
4140         my $type = shift || "";
4141         my %refs;
4142         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
4143         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
4144         defined(my $fd = git_cmd_pipe "show-ref", "--dereference",
4145                 ($type ? ("--", "refs/$type") : ())) # use -- <pattern> if $type
4146                 or return;
4147
4148         while (my $line = to_utf8(scalar <$fd>)) {
4149                 chomp $line;
4150                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
4151                         if (defined $refs{$1}) {
4152                                 push @{$refs{$1}}, $2;
4153                         } else {
4154                                 $refs{$1} = [ $2 ];
4155                         }
4156                 }
4157         }
4158         close $fd or return;
4159         return \%refs;
4160 }
4161
4162 sub git_get_rev_name_tags {
4163         my $hash = shift || return undef;
4164
4165         defined(my $fd = git_cmd_pipe "name-rev", "--tags", $hash)
4166                 or return;
4167         my $name_rev = to_utf8(scalar <$fd>);
4168         close $fd;
4169
4170         if ($name_rev =~ m|^$hash tags/(.*)$|) {
4171                 return $1;
4172         } else {
4173                 # catches also '$hash undefined' output
4174                 return undef;
4175         }
4176 }
4177
4178 ## ----------------------------------------------------------------------
4179 ## parse to hash functions
4180
4181 sub parse_date {
4182         my $epoch = shift;
4183         my $tz = shift || "-0000";
4184
4185         my %date;
4186         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
4187         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
4188         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
4189         $date{'hour'} = $hour;
4190         $date{'minute'} = $min;
4191         $date{'mday'} = $mday;
4192         $date{'day'} = $days[$wday];
4193         $date{'month'} = $months[$mon];
4194         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
4195                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
4196         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
4197                              $mday, $months[$mon], $hour ,$min;
4198         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
4199                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
4200
4201         my ($tz_sign, $tz_hour, $tz_min) =
4202                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
4203         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
4204         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
4205         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
4206         $date{'hour_local'} = $hour;
4207         $date{'minute_local'} = $min;
4208         $date{'mday_local'} = $mday;
4209         $date{'tz_local'} = $tz;
4210         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
4211                                   1900+$year, $mon+1, $mday,
4212                                   $hour, $min, $sec, $tz);
4213         return %date;
4214 }
4215
4216 sub parse_file_date {
4217         my $file = shift;
4218         my $mtime = (stat("$projectroot/$project/$file"))[9];
4219         return () unless defined $mtime;
4220         my $tzoffset = timegm((localtime($mtime))[0..5]) - $mtime;
4221         my $tzstring = '+';
4222         if ($tzoffset <= 0) {
4223                 $tzstring = '-';
4224                 $tzoffset *= -1;
4225         }
4226         $tzoffset = int($tzoffset/60);
4227         $tzstring .= sprintf("%02d%02d", int($tzoffset/60), $tzoffset%60);
4228         return parse_date($mtime, $tzstring);
4229 }
4230
4231 sub parse_tag {
4232         my $tag_id = shift;
4233         my %tag;
4234         my @comment;
4235
4236         defined(my $fd = git_cmd_pipe "cat-file", "tag", $tag_id) or return;
4237         $tag{'id'} = $tag_id;
4238         while (my $line = to_utf8(scalar <$fd>)) {
4239                 chomp $line;
4240                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
4241                         $tag{'object'} = $1;
4242                 } elsif ($line =~ m/^type (.+)$/) {
4243                         $tag{'type'} = $1;
4244                 } elsif ($line =~ m/^tag (.+)$/) {
4245                         $tag{'name'} = $1;
4246                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
4247                         $tag{'author'} = $1;
4248                         $tag{'author_epoch'} = $2;
4249                         $tag{'author_tz'} = $3;
4250                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
4251                                 $tag{'author_name'}  = $1;
4252                                 $tag{'author_email'} = $2;
4253                         } else {
4254                                 $tag{'author_name'} = $tag{'author'};
4255                         }
4256                 } elsif ($line =~ m/--BEGIN/) {
4257                         push @comment, $line;
4258                         last;
4259                 } elsif ($line eq "") {
4260                         last;
4261                 }
4262         }
4263         push @comment, map(to_utf8($_), <$fd>);
4264         $tag{'comment'} = \@comment;
4265         close $fd or return;
4266         if (!defined $tag{'name'}) {
4267                 return
4268         };
4269         return %tag
4270 }
4271
4272 sub parse_commit_text {
4273         my ($commit_text, $withparents) = @_;
4274         my @commit_lines = split '\n', $commit_text;
4275         my %co;
4276
4277         pop @commit_lines; # Remove '\0'
4278
4279         if (! @commit_lines) {
4280                 return;
4281         }
4282
4283         my $header = shift @commit_lines;
4284         if ($header !~ m/^[0-9a-fA-F]{40}/) {
4285                 return;
4286         }
4287         ($co{'id'}, my @parents) = split ' ', $header;
4288         while (my $line = shift @commit_lines) {
4289                 last if $line eq "\n";
4290                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
4291                         $co{'tree'} = $1;
4292                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
4293                         push @parents, $1;
4294                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
4295                         $co{'author'} = to_utf8($1);
4296                         $co{'author_epoch'} = $2;
4297                         $co{'author_tz'} = $3;
4298                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
4299                                 $co{'author_name'}  = $1;
4300                                 $co{'author_email'} = $2;
4301                         } else {
4302                                 $co{'author_name'} = $co{'author'};
4303                         }
4304                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
4305                         $co{'committer'} = to_utf8($1);
4306                         $co{'committer_epoch'} = $2;
4307                         $co{'committer_tz'} = $3;
4308                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
4309                                 $co{'committer_name'}  = $1;
4310                                 $co{'committer_email'} = $2;
4311                         } else {
4312                                 $co{'committer_name'} = $co{'committer'};
4313                         }
4314                 }
4315         }
4316         if (!defined $co{'tree'}) {
4317                 return;
4318         };
4319         $co{'parents'} = \@parents;
4320         $co{'parent'} = $parents[0];
4321
4322         @commit_lines = map to_utf8($_), @commit_lines;
4323         foreach my $title (@commit_lines) {
4324                 $title =~ s/^    //;
4325                 if ($title ne "") {
4326                         $co{'title'} = chop_str($title, 80, 5);
4327                         # remove leading stuff of merges to make the interesting part visible
4328                         if (length($title) > 50) {
4329                                 $title =~ s/^Automatic //;
4330                                 $title =~ s/^merge (of|with) /Merge ... /i;
4331                                 if (length($title) > 50) {
4332                                         $title =~ s/(http|rsync):\/\///;
4333                                 }
4334                                 if (length($title) > 50) {
4335                                         $title =~ s/(master|www|rsync)\.//;
4336                                 }
4337                                 if (length($title) > 50) {
4338                                         $title =~ s/kernel.org:?//;
4339                                 }
4340                                 if (length($title) > 50) {
4341                                         $title =~ s/\/pub\/scm//;
4342                                 }
4343                         }
4344                         $co{'title_short'} = chop_str($title, 50, 5);
4345                         last;
4346                 }
4347         }
4348         if (! defined $co{'title'} || $co{'title'} eq "") {
4349                 $co{'title'} = $co{'title_short'} = '(no commit message)';
4350         }
4351         # remove added spaces
4352         foreach my $line (@commit_lines) {
4353                 $line =~ s/^    //;
4354         }
4355         $co{'comment'} = \@commit_lines;
4356
4357         my $age_epoch = $co{'committer_epoch'};
4358         $co{'age_epoch'} = $age_epoch;
4359         my $time_now = time;
4360         $co{'age_string'} = age_string($age_epoch, $time_now);
4361         $co{'age_string_date'} = age_string_date($age_epoch, $time_now);
4362         $co{'age_string_age'} = age_string_age($age_epoch, $time_now);
4363         return %co;
4364 }
4365
4366 sub parse_commit {
4367         my ($commit_id) = @_;
4368         my %co;
4369
4370         local $/ = "\0";
4371
4372         defined(my $fd = git_cmd_pipe "rev-list",
4373                 "--parents",
4374                 "--header",
4375                 "--max-count=1",
4376                 $commit_id,
4377                 "--")
4378                 or die_error(500, "Open git-rev-list failed");
4379         %co = parse_commit_text(<$fd>, 1);
4380         close $fd;
4381
4382         return %co;
4383 }
4384
4385 sub parse_commits {
4386         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
4387         my @cos;
4388
4389         $maxcount ||= 1;
4390         $skip ||= 0;
4391
4392         local $/ = "\0";
4393
4394         defined(my $fd = git_cmd_pipe "rev-list",
4395                 "--header",
4396                 @args,
4397                 ("--max-count=" . $maxcount),
4398                 ("--skip=" . $skip),
4399                 @extra_options,
4400                 $commit_id,
4401                 "--",
4402                 ($filename ? ($filename) : ()))
4403                 or die_error(500, "Open git-rev-list failed");
4404         while (my $line = <$fd>) {
4405                 my %co = parse_commit_text($line);
4406                 push @cos, \%co;
4407         }
4408         close $fd;
4409
4410         return wantarray ? @cos : \@cos;
4411 }
4412
4413 # parse line of git-diff-tree "raw" output
4414 sub parse_difftree_raw_line {
4415         my $line = shift;
4416         my %res;
4417
4418         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
4419         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
4420         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
4421                 $res{'from_mode'} = $1;
4422                 $res{'to_mode'} = $2;
4423                 $res{'from_id'} = $3;
4424                 $res{'to_id'} = $4;
4425                 $res{'status'} = $5;
4426                 $res{'similarity'} = $6;
4427                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
4428                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
4429                 } else {
4430                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
4431                 }
4432         }
4433         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
4434         # combined diff (for merge commit)
4435         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
4436                 $res{'nparents'}  = length($1);
4437                 $res{'from_mode'} = [ split(' ', $2) ];
4438                 $res{'to_mode'} = pop @{$res{'from_mode'}};
4439                 $res{'from_id'} = [ split(' ', $3) ];
4440                 $res{'to_id'} = pop @{$res{'from_id'}};
4441                 $res{'status'} = [ split('', $4) ];
4442                 $res{'to_file'} = unquote($5);
4443         }
4444         # 'c512b523472485aef4fff9e57b229d9d243c967f'
4445         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
4446                 $res{'commit'} = $1;
4447         }
4448
4449         return wantarray ? %res : \%res;
4450 }
4451
4452 # wrapper: return parsed line of git-diff-tree "raw" output
4453 # (the argument might be raw line, or parsed info)
4454 sub parsed_difftree_line {
4455         my $line_or_ref = shift;
4456
4457         if (ref($line_or_ref) eq "HASH") {
4458                 # pre-parsed (or generated by hand)
4459                 return $line_or_ref;
4460         } else {
4461                 return parse_difftree_raw_line($line_or_ref);
4462         }
4463 }
4464
4465 # parse line of git-ls-tree output
4466 sub parse_ls_tree_line {
4467         my $line = shift;
4468         my %opts = @_;
4469         my %res;
4470
4471         if ($opts{'-l'}) {
4472                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
4473                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
4474
4475                 $res{'mode'} = $1;
4476                 $res{'type'} = $2;
4477                 $res{'hash'} = $3;
4478                 $res{'size'} = $4;
4479                 if ($opts{'-z'}) {
4480                         $res{'name'} = $5;
4481                 } else {
4482                         $res{'name'} = unquote($5);
4483                 }
4484         } else {
4485                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4486                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
4487
4488                 $res{'mode'} = $1;
4489                 $res{'type'} = $2;
4490                 $res{'hash'} = $3;
4491                 if ($opts{'-z'}) {
4492                         $res{'name'} = $4;
4493                 } else {
4494                         $res{'name'} = unquote($4);
4495                 }
4496         }
4497
4498         return wantarray ? %res : \%res;
4499 }
4500
4501 # generates _two_ hashes, references to which are passed as 2 and 3 argument
4502 sub parse_from_to_diffinfo {
4503         my ($diffinfo, $from, $to, @parents) = @_;
4504
4505         if ($diffinfo->{'nparents'}) {
4506                 # combined diff
4507                 $from->{'file'} = [];
4508                 $from->{'href'} = [];
4509                 fill_from_file_info($diffinfo, @parents)
4510                         unless exists $diffinfo->{'from_file'};
4511                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
4512                         $from->{'file'}[$i] =
4513                                 defined $diffinfo->{'from_file'}[$i] ?
4514                                         $diffinfo->{'from_file'}[$i] :
4515                                         $diffinfo->{'to_file'};
4516                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
4517                                 $from->{'href'}[$i] = href(action=>"blob",
4518                                                            hash_base=>$parents[$i],
4519                                                            hash=>$diffinfo->{'from_id'}[$i],
4520                                                            file_name=>$from->{'file'}[$i]);
4521                         } else {
4522                                 $from->{'href'}[$i] = undef;
4523                         }
4524                 }
4525         } else {
4526                 # ordinary (not combined) diff
4527                 $from->{'file'} = $diffinfo->{'from_file'};
4528                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
4529                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
4530                                                hash=>$diffinfo->{'from_id'},
4531                                                file_name=>$from->{'file'});
4532                 } else {
4533                         delete $from->{'href'};
4534                 }
4535         }
4536
4537         $to->{'file'} = $diffinfo->{'to_file'};
4538         if (!is_deleted($diffinfo)) { # file exists in result
4539                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
4540                                      hash=>$diffinfo->{'to_id'},
4541                                      file_name=>$to->{'file'});
4542         } else {
4543                 delete $to->{'href'};
4544         }
4545 }
4546
4547 ## ......................................................................
4548 ## parse to array of hashes functions
4549
4550 sub git_get_heads_list {
4551         my ($limit, @classes) = @_;
4552         @classes = get_branch_refs() unless @classes;
4553         my @patterns = map { "refs/$_" } @classes;
4554         my @headslist;
4555
4556         defined(my $fd = git_cmd_pipe 'for-each-ref',
4557                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
4558                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
4559                 @patterns)
4560                 or return;
4561         while (my $line = to_utf8(scalar <$fd>)) {
4562                 my %ref_item;
4563
4564                 chomp $line;
4565                 my ($refinfo, $committerinfo) = split(/\0/, $line);
4566                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
4567                 my ($committer, $epoch, $tz) =
4568                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
4569                 $ref_item{'fullname'}  = $name;
4570                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
4571                 $name =~ s!^refs/($strip_refs|remotes)/!!;
4572                 $ref_item{'name'} = $name;
4573                 # for refs neither in 'heads' nor 'remotes' we want to
4574                 # show their ref dir
4575                 my $ref_dir = (defined $1) ? $1 : '';
4576                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
4577                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
4578                 }
4579
4580                 $ref_item{'id'}    = $hash;
4581                 $ref_item{'title'} = $title || '(no commit message)';
4582                 $ref_item{'epoch'} = $epoch;
4583                 if ($epoch) {
4584                         $ref_item{'age'} = age_string($ref_item{'epoch'});
4585                 } else {
4586                         $ref_item{'age'} = "unknown";
4587                 }
4588
4589                 push @headslist, \%ref_item;
4590         }
4591         close $fd;
4592
4593         return wantarray ? @headslist : \@headslist;
4594 }
4595
4596 sub git_get_tags_list {
4597         my $limit = shift;
4598         my @tagslist;
4599         my $all = shift || 0;
4600         my $order = shift || $default_refs_order;
4601         my $sortkey = $all && $order eq 'name' ? 'refname' : '-creatordate';
4602
4603         defined(my $fd = git_cmd_pipe 'for-each-ref',
4604                 ($limit ? '--count='.($limit+1) : ()), "--sort=$sortkey",
4605                 '--format=%(objectname) %(objecttype) %(refname) '.
4606                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
4607                 ($all ? 'refs' : 'refs/tags'))
4608                 or return;
4609         while (my $line = to_utf8(scalar <$fd>)) {
4610                 my %ref_item;
4611
4612                 chomp $line;
4613                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
4614                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
4615                 my ($creator, $epoch, $tz) =
4616                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
4617                 $ref_item{'fullname'} = $name;
4618                 $name =~ s!^refs/!! if $all;
4619                 $name =~ s!^refs/tags/!! unless $all;
4620
4621                 $ref_item{'type'} = $type;
4622                 $ref_item{'id'} = $id;
4623                 $ref_item{'name'} = $name;
4624                 if ($type eq "tag") {
4625                         $ref_item{'subject'} = $title;
4626                         $ref_item{'reftype'} = $reftype;
4627                         $ref_item{'refid'}   = $refid;
4628                 } else {
4629                         $ref_item{'reftype'} = $type;
4630                         $ref_item{'refid'}   = $id;
4631                 }
4632
4633                 if ($type eq "tag" || $type eq "commit") {
4634                         $ref_item{'epoch'} = $epoch;
4635                         if ($epoch) {
4636                                 $ref_item{'age'} = age_string($ref_item{'epoch'});
4637                         } else {
4638                                 $ref_item{'age'} = "unknown";
4639                         }
4640                 }
4641
4642                 push @tagslist, \%ref_item;
4643         }
4644         close $fd;
4645
4646         return wantarray ? @tagslist : \@tagslist;
4647 }
4648
4649 ## ----------------------------------------------------------------------
4650 ## filesystem-related functions
4651
4652 sub get_file_owner {
4653         my $path = shift;
4654
4655         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
4656         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
4657         if (!defined $gcos) {
4658                 return undef;
4659         }
4660         my $owner = $gcos;
4661         $owner =~ s/[,;].*$//;
4662         return to_utf8($owner);
4663 }
4664
4665 # assume that file exists
4666 sub insert_file {
4667         my $filename = shift;
4668
4669         open my $fd, '<', $filename;
4670         while (<$fd>) {
4671                 print to_utf8($_);
4672         }
4673         close $fd;
4674 }
4675
4676 # return undef on failure
4677 sub collect_output {
4678         defined(my $fd = cmd_pipe @_) or return undef;
4679         if (eof $fd) {
4680                 close $fd;
4681                 return undef;
4682         }
4683         my $result = join('', map({ to_utf8($_) } <$fd>));
4684         close $fd or return undef;
4685         return $result;
4686 }
4687
4688 # return undef on failure
4689 # return '' if only comments
4690 sub collect_html_file {
4691         my $filename = shift;
4692
4693         open my $fd, '<', $filename or return undef;
4694         my $result = join('', map({ to_utf8($_) } <$fd>));
4695         close $fd or return undef;
4696         return undef unless defined($result);
4697         my $test = $result;
4698         $test =~ s/<!--(?:[^-]|(?:-(?!-)))*-->//gs;
4699         $test =~ s/\s+//s;
4700         return $test eq '' ? '' : $result;
4701 }
4702
4703 ## ......................................................................
4704 ## mimetype related functions
4705
4706 sub mimetype_guess_file {
4707         my $filename = shift;
4708         my $mimemap = shift;
4709         my $rawmode = shift;
4710         -r $mimemap or return undef;
4711
4712         my %mimemap;
4713         open(my $mh, '<', $mimemap) or return undef;
4714         while (<$mh>) {
4715                 next if m/^#/; # skip comments
4716                 my ($mimetype, @exts) = split(/\s+/);
4717                 foreach my $ext (@exts) {
4718                         $mimemap{$ext} = $mimetype;
4719                 }
4720         }
4721         close($mh);
4722
4723         my ($ext, $ans);
4724         $ext = $1 if $filename =~ /\.([^.]*)$/;
4725         $ans = $mimemap{$ext} if $ext;
4726         if (defined $ans) {
4727                 my $l = lc($ans);
4728                 $ans = 'text/html' if $l eq 'application/xhtml+xml';
4729                 if (!$rawmode) {
4730                         $ans = 'text/xml' if $l =~ m!^application/[^\s:;,=]+\+xml$! ||
4731                                              $l eq 'image/svg+xml' ||
4732                                              $l eq 'application/xml-dtd' ||
4733                                              $l eq 'application/xml-external-parsed-entity';
4734                 }
4735         }
4736         return $ans;
4737 }
4738
4739 sub mimetype_guess {
4740         my $filename = shift;
4741         my $rawmode = shift;
4742         my $mime;
4743         $filename =~ /\./ or return undef;
4744
4745         if ($mimetypes_file) {
4746                 my $file = $mimetypes_file;
4747                 if ($file !~ m!^/!) { # if it is relative path
4748                         # it is relative to project
4749                         $file = "$projectroot/$project/$file";
4750                 }
4751                 $mime = mimetype_guess_file($filename, $file, $rawmode);
4752         }
4753         $mime ||= mimetype_guess_file($filename, '/etc/mime.types', $rawmode);
4754         return $mime;
4755 }
4756
4757 sub blob_mimetype {
4758         my $fd = shift;
4759         my $filename = shift;
4760         my $rawmode = shift;
4761         my $mime;
4762
4763         # The -T/-B file operators produce the wrong result unless a perlio
4764         # layer is present when the file handle is a pipe that delivers less
4765         # than 512 bytes of data before reaching EOF.
4766         #
4767         # If we are running in a Perl that uses the stdio layer rather than the
4768         # unix+perlio layers we will end up adding a perlio layer on top of the
4769         # stdio layer and get a second level of buffering.  This is harmless
4770         # and it makes the -T/-B file operators work properly in all cases.
4771
4772         binmode $fd, ":perlio" or die_error(500, "Adding perlio layer failed")
4773                 unless grep /^perlio$/, PerlIO::get_layers($fd);
4774
4775         $mime = mimetype_guess($filename, $rawmode) if defined $filename;
4776
4777         if (!$mime && $filename) {
4778                 if ($filename =~ m/\.html?$/i) {
4779                         $mime = 'text/html';
4780                 } elsif ($filename =~ m/\.xht(?:ml)?$/i) {
4781                         $mime = 'text/html';
4782                 } elsif ($filename =~ m/\.te?xt?$/i) {
4783                         $mime = 'text/plain';
4784                 } elsif ($filename =~ m/\.(?:markdown|md)$/i) {
4785                         $mime = 'text/plain';
4786                 } elsif ($filename =~ m/\.png$/i) {
4787                         $mime = 'image/png';
4788                 } elsif ($filename =~ m/\.gif$/i) {
4789                         $mime = 'image/gif';
4790                 } elsif ($filename =~ m/\.jpe?g$/i) {
4791                         $mime = 'image/jpeg';
4792                 } elsif ($filename =~ m/\.svgz?$/i) {
4793                         $mime = 'image/svg+xml';
4794                 }
4795         }
4796
4797         # just in case
4798         return $default_blob_plain_mimetype || 'application/octet-stream' unless $fd || $mime;
4799
4800         $mime = -T $fd ? 'text/plain' : 'application/octet-stream' unless $mime;
4801
4802         return $mime;
4803 }
4804
4805 sub is_ascii {
4806         use bytes;
4807         my $data = shift;
4808         return scalar($data =~ /^[\x00-\x7f]*$/);
4809 }
4810
4811 sub is_valid_utf8 {
4812         my $data = shift;
4813         return utf8::decode($data);
4814 }
4815
4816 sub extract_html_charset {
4817         return undef unless $_[0] && "$_[0]</head>" =~ m#<head(?:\s+[^>]*)?(?<!/)>(.*?)</head\s*>#is;
4818         my $head = $1;
4819         return $2 if $head =~ m#<meta\s+charset\s*=\s*(['"])\s*([a-z0-9(:)_.+-]+)\s*\1\s*/?>#is;
4820         while ($head =~ m#<meta\s+(http-equiv|content)\s*=\s*(['"])\s*([^\2]+?)\s*\2\s*(http-equiv|content)\s*=\s*(['"])\s*([^\5]+?)\s*\5\s*/?>#sig) {
4821                 my %kv = (lc($1) => $3, lc($4) => $6);
4822                 my ($he, $c) = (lc($kv{'http-equiv'}), $kv{'content'});
4823                 return $1 if $he && $c && $he eq 'content-type' &&
4824                         $c =~ m!\s*text/html\s*;\s*charset\s*=\s*([a-z0-9(:)_.+-]+)\s*$!is;
4825         }
4826         return undef;
4827 }
4828
4829 sub blob_contenttype {
4830         my ($fd, $file_name, $type) = @_;
4831
4832         $type ||= blob_mimetype($fd, $file_name, 1);
4833         return $type unless $type =~ m!^text/.+!i;
4834         my ($leader, $charset, $htmlcharset);
4835         if ($fd && read($fd, $leader, 32768)) {{
4836                 $charset='US-ASCII' if is_ascii($leader);
4837                 return ("$type; charset=UTF-8", $leader) if !$charset && is_valid_utf8($leader);
4838                 $charset='ISO-8859-1' unless $charset;
4839                 $htmlcharset = extract_html_charset($leader) if $type eq 'text/html';
4840                 if ($htmlcharset && $charset ne 'US-ASCII') {
4841                         $htmlcharset = undef if $htmlcharset =~ /^(?:utf-8|us-ascii)$/i
4842                 }
4843         }}
4844         return ("$type; charset=$htmlcharset", $leader) if $htmlcharset;
4845         my $defcharset = $default_text_plain_charset || '';
4846         $defcharset =~ s/^\s+//;
4847         $defcharset =~ s/\s+$//;
4848         $defcharset = '' if $charset && $charset ne 'US-ASCII' && $defcharset =~ /^(?:utf-8|us-ascii)$/i;
4849         return ("$type; charset=" . ($defcharset || 'ISO-8859-1'), $leader);
4850 }
4851
4852 # peek the first upto 128 bytes off a file handle
4853 sub peek128bytes {
4854         my $fd = shift;
4855
4856         use IO::Handle;
4857         use bytes;
4858
4859         my $prefix128;
4860         return '' unless $fd && read($fd, $prefix128, 128);
4861
4862         # In the general case, we're guaranteed only to be able to ungetc one
4863         # character (provided, of course, we actually got a character first).
4864         #
4865         # However, we know:
4866         #
4867         # 1) we are dealing with a :perlio layer since blob_mimetype will have
4868         #    already been called at least once on the file handle before us
4869         #
4870         # 2) we have an $fd positioned at the start of the input stream and
4871         #    therefore know we were positioned at a buffer boundary before
4872         #    reading the initial upto 128 bytes
4873         #
4874         # 3) the buffer size is at least 512 bytes
4875         #
4876         # 4) we are careful to only unget raw bytes
4877         #
4878         # 5) we are attempting to unget exactly the same number of bytes we got
4879         #
4880         # Given the above conditions we will ALWAYS be able to safely unget
4881         # the $prefix128 value we just got.
4882         #
4883         # In fact, we could read up to 511 bytes and still be sure.
4884         # (Reading 512 might pop us into the next internal buffer, but probably
4885         # not since that could break the always able to unget at least the one
4886         # you just got guarantee.)
4887
4888         map {$fd->ungetc(ord($_))} reverse(split //, $prefix128);
4889
4890         return $prefix128;
4891 }
4892
4893 # guess file syntax for syntax highlighting; return undef if no highlighting
4894 # the name of syntax can (in the future) depend on syntax highlighter used
4895 sub guess_file_syntax {
4896         my ($fd, $mimetype, $file_name) = @_;
4897         return undef unless $fd && defined $file_name &&
4898                 defined $mimetype && $mimetype =~ m!^text/.+!i;
4899         my $basename = basename($file_name, '.in');
4900         return $highlight_basename{$basename}
4901                 if exists $highlight_basename{$basename};
4902
4903         # Peek to see if there's a shebang or xml line.
4904         # We always operate on bytes when testing this.
4905         {
4906                 use bytes;
4907                 my $shebang = peek128bytes($fd);
4908                 if (length($shebang) >= 4 && $shebang =~ /^#!/) { # 4 would be '#!/x'
4909                         foreach my $key (keys %highlight_shebang) {
4910                                 my $ar = ref($highlight_shebang{$key}) ?
4911                                         $highlight_shebang{$key} :
4912                                         [$highlight_shebang{key}];
4913                                 map {return $key if $shebang =~ /$_/} @$ar;
4914                         }
4915                 }
4916                 return 'xml' if $shebang =~ m!^\s*<\?xml\s!; # "xml" must be lowercase
4917         }
4918
4919         $basename =~ /\.([^.]*)$/;
4920         my $ext = $1 or return undef;
4921         return $highlight_ext{$ext}
4922                 if exists $highlight_ext{$ext};
4923
4924         return undef;
4925 }
4926
4927 # run highlighter and return FD of its output,
4928 # or return original FD if no highlighting
4929 sub run_highlighter {
4930         my ($fd, $syntax) = @_;
4931         return $fd unless $fd && !eof($fd) && defined $highlight_bin && defined $syntax;
4932
4933         defined(my $hifd = cmd_pipe $posix_shell_bin, '-c',
4934                 quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
4935                 $to_utf8_pipe_command.
4936                 quote_command($highlight_bin).
4937                 " --replace-tabs=8 --fragment --syntax $syntax")
4938                 or die_error(500, "Couldn't open file or run syntax highlighter");
4939         if (eof $hifd) {
4940                 # just in case, should not happen as we tested !eof($fd) above
4941                 return $fd if close($hifd);
4942
4943                 # should not happen
4944                 !$! or die_error(500, "Couldn't close syntax highighter pipe");
4945
4946                 # leaving us with the only possibility a non-zero exit status (possibly a signal);
4947                 # instead of dying horribly on this, just skip the highlighting
4948                 # but do output a message about it to STDERR that will end up in the log
4949                 print STDERR "warning: skipping failed highlight for --syntax $syntax: ".
4950                         sprintf("child exit status 0x%x\n", $?);
4951                 return $fd
4952         }
4953         close $fd;
4954         return ($hifd, 1);
4955 }
4956
4957 ## ======================================================================
4958 ## functions printing HTML: header, footer, error page
4959
4960 sub get_page_title {
4961         my $title = to_utf8($site_name);
4962
4963         unless (defined $project) {
4964                 if (defined $project_filter) {
4965                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4966                 }
4967                 return $title;
4968         }
4969         $title .= " - " . to_utf8($project);
4970
4971         return $title unless (defined $action);
4972         my $action_print = $action eq 'blame_incremental' ? 'blame' : $action;
4973         $title .= "/$action_print"; # $action is US-ASCII (7bit ASCII)
4974
4975         return $title unless (defined $file_name);
4976         $title .= " - " . esc_path($file_name);
4977         if ($action eq "tree" && $file_name !~ m|/$|) {
4978                 $title .= "/";
4979         }
4980
4981         return $title;
4982 }
4983
4984 sub get_content_type_html {
4985         # We do not ever emit application/xhtml+xml since that gives us
4986         # no benefits and it makes many browsers (e.g. Firefox) exceedingly
4987         # strict, which is troublesome for example when showing user-supplied
4988         # README.html files.
4989         return 'text/html';
4990 }
4991
4992 sub print_feed_meta {
4993         if (defined $project) {
4994                 my %href_params = get_feed_info();
4995                 if (!exists $href_params{'-title'}) {
4996                         $href_params{'-title'} = 'log';
4997                 }
4998
4999                 foreach my $format (qw(RSS Atom)) {
5000                         my $type = lc($format);
5001                         my %link_attr = (
5002                                 '-rel' => 'alternate',
5003                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
5004                                 '-type' => "application/$type+xml"
5005                         );
5006
5007                         $href_params{'extra_options'} = undef;
5008                         $href_params{'action'} = $type;
5009                         $link_attr{'-href'} = href(%href_params);
5010                         print "<link ".
5011                               "rel=\"$link_attr{'-rel'}\" ".
5012                               "title=\"$link_attr{'-title'}\" ".
5013                               "href=\"$link_attr{'-href'}\" ".
5014                               "type=\"$link_attr{'-type'}\" ".
5015                               "/>\n";
5016
5017                         $href_params{'extra_options'} = '--no-merges';
5018                         $link_attr{'-href'} = href(%href_params);
5019                         $link_attr{'-title'} .= ' (no merges)';
5020                         print "<link ".
5021                               "rel=\"$link_attr{'-rel'}\" ".
5022                               "title=\"$link_attr{'-title'}\" ".
5023                               "href=\"$link_attr{'-href'}\" ".
5024                               "type=\"$link_attr{'-type'}\" ".
5025                               "/>\n";
5026                 }
5027
5028         } else {
5029                 printf('<link rel="alternate" title="%s projects list" '.
5030                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
5031                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
5032                 printf('<link rel="alternate" title="%s projects feeds" '.
5033                        'href="%s" type="text/x-opml" />'."\n",
5034                        esc_attr($site_name), href(project=>undef, action=>"opml"));
5035         }
5036 }
5037
5038 sub print_header_links {
5039         my $status = shift;
5040
5041         # print out each stylesheet that exist, providing backwards capability
5042         # for those people who defined $stylesheet in a config file
5043         if (defined $stylesheet) {
5044                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
5045         } else {
5046                 foreach my $stylesheet (@stylesheets) {
5047                         next unless $stylesheet;
5048                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
5049                 }
5050         }
5051         print_feed_meta()
5052                 if ($status eq '200 OK');
5053         if (defined $favicon) {
5054                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
5055         }
5056 }
5057
5058 sub print_nav_breadcrumbs_path {
5059         my $dirprefix = undef;
5060         while (my $part = shift) {
5061                 $dirprefix .= "/" if defined $dirprefix;
5062                 $dirprefix .= $part;
5063                 print $cgi->a({-href => href(project => undef,
5064                                              project_filter => $dirprefix,
5065                                              action => "project_list")},
5066                               esc_html($part)) . " / ";
5067         }
5068 }
5069
5070 sub print_nav_breadcrumbs {
5071         my %opts = @_;
5072
5073         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
5074                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
5075         }
5076         if (defined $project) {
5077                 my @dirname = split '/', $project;
5078                 my $projectbasename = pop @dirname;
5079                 print_nav_breadcrumbs_path(@dirname);
5080                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
5081                 if (defined $action) {
5082                         my $action_print = $action ;
5083                         $action_print = 'blame' if $action_print eq 'blame_incremental';
5084                         if (defined $opts{-action_extra}) {
5085                                 $action_print = $cgi->a({-href => href(action=>$action)},
5086                                         $action);
5087                         }
5088                         print " / $action_print";
5089                 }
5090                 if (defined $opts{-action_extra}) {
5091                         print " / $opts{-action_extra}";
5092                 }
5093                 print "\n";
5094         } elsif (defined $project_filter) {
5095                 print_nav_breadcrumbs_path(split '/', $project_filter);
5096         }
5097 }
5098
5099 sub print_search_form {
5100         if (!defined $searchtext) {
5101                 $searchtext = "";
5102         }
5103         my $search_hash;
5104         if (defined $hash_base) {
5105                 $search_hash = $hash_base;
5106         } elsif (defined $hash) {
5107                 $search_hash = $hash;
5108         } else {
5109                 $search_hash = "HEAD";
5110         }
5111         # We can't use href() here because we need to encode the
5112         # URL parameters into the form, not into the action link.
5113         my $action = $my_uri;
5114         my $use_pathinfo = gitweb_check_feature('pathinfo');
5115         if ($use_pathinfo) {
5116                 # See notes about doubled / in href()
5117                 $action =~ s,/$,,;
5118                 $action .= "/".esc_path_info($project);
5119         }
5120         print $cgi->start_form(-method => "get", -action => $action) .
5121               "<div class=\"search\">\n" .
5122               (!$use_pathinfo &&
5123               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
5124               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
5125               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
5126               $cgi->popup_menu(-name => 'st', -default => 'commit',
5127                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
5128               " " . $cgi->a({-href => href(action=>"search_help"),
5129                              -title => "search help" }, "?") . " search:\n",
5130               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
5131               "<span title=\"Extended regular expression\">" .
5132               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5133                              -checked => $search_use_regexp) .
5134               "</span>" .
5135               "</div>" .
5136               $cgi->end_form() . "\n";
5137 }
5138
5139 sub git_header_html {
5140         my $status = shift || "200 OK";
5141         my $expires = shift;
5142         my %opts = @_;
5143
5144         my $title = get_page_title();
5145         my $content_type = get_content_type_html();
5146         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
5147                            -status=> $status, -expires => $expires)
5148                 unless ($opts{'-no_http_header'});
5149         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
5150         print <<EOF;
5151 <?xml version="1.0" encoding="utf-8"?>
5152 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
5153 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
5154 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
5155 <!-- git core binaries version $git_version -->
5156 <head>
5157 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
5158 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
5159 <meta name="robots" content="index, nofollow"/>
5160 <title>$title</title>
5161 <script type="text/javascript">/* <![CDATA[ */
5162 function fixBlameLinks() {
5163         var allLinks = document.getElementsByTagName("a");
5164         for (var i = 0; i < allLinks.length; i++) {
5165                 var link = allLinks.item(i);
5166                 if (link.className == 'blamelink')
5167                         link.href = link.href.replace("/blame/", "/blame_incremental/");
5168         }
5169 }
5170 /* ]]> */</script>
5171 EOF
5172         # the stylesheet, favicon etc urls won't work correctly with path_info
5173         # unless we set the appropriate base URL
5174         if ($ENV{'PATH_INFO'}) {
5175                 print "<base href=\"".esc_url($base_url)."\" />\n";
5176         }
5177         print_header_links($status);
5178
5179         if (defined $site_html_head_string) {
5180                 print to_utf8($site_html_head_string);
5181         }
5182
5183         print "</head>\n" .
5184               "<body>\n";
5185
5186         if (defined $site_header && -f $site_header) {
5187                 insert_file($site_header);
5188         }
5189
5190         print "<div class=\"page_header\">\n";
5191         if (defined $logo) {
5192                 print $cgi->a({-href => esc_url($logo_url),
5193                                -title => $logo_label},
5194                               $cgi->img({-src => esc_url($logo),
5195                                          -width => 72, -height => 27,
5196                                          -alt => "git",
5197                                          -class => "logo"}));
5198         }
5199         print_nav_breadcrumbs(%opts);
5200         print "</div>\n";
5201
5202         my $have_search = gitweb_check_feature('search');
5203         if (defined $project && $have_search) {
5204                 print_search_form();
5205         }
5206 }
5207
5208 sub compute_timed_interval {
5209         return "<?gitweb compute_timed_interval?>" if $cache_mode_active;
5210         return tv_interval($t0, [ gettimeofday() ]);
5211 }
5212
5213 sub compute_commands_count {
5214         return "<?gitweb compute_commands_count?>" if $cache_mode_active;
5215         my $s = $number_of_git_cmds == 1 ? '' : 's';
5216         return '<span id="generating_cmd">'.
5217                 $number_of_git_cmds.
5218                 "</span> git command$s";
5219 }
5220
5221 sub git_footer_html {
5222         my $feed_class = 'rss_logo';
5223
5224         print "<div class=\"page_footer\">\n";
5225         if (defined $project) {
5226                 my $descr = git_get_project_description($project);
5227                 if (defined $descr) {
5228                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
5229                 }
5230
5231                 my %href_params = get_feed_info();
5232                 if (!%href_params) {
5233                         $feed_class .= ' generic';
5234                 }
5235                 $href_params{'-title'} ||= 'log';
5236
5237                 foreach my $format (qw(RSS Atom)) {
5238                         $href_params{'action'} = lc($format);
5239                         print $cgi->a({-href => href(%href_params),
5240                                       -title => "$href_params{'-title'} $format feed",
5241                                       -class => $feed_class}, $format)."\n";
5242                 }
5243
5244         } else {
5245                 print $cgi->a({-href => href(project=>undef, action=>"opml",
5246                                              project_filter => $project_filter),
5247                               -class => $feed_class}, "OPML") . " ";
5248                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
5249                                              project_filter => $project_filter),
5250                               -class => $feed_class}, "TXT") . "\n";
5251         }
5252         print "</div>\n"; # class="page_footer"
5253
5254         if (defined $t0 && gitweb_check_feature('timed')) {
5255                 print "<div id=\"generating_info\">\n";
5256                 print 'This page took '.
5257                       '<span id="generating_time" class="time_span">'.
5258                       compute_timed_interval().
5259                       ' seconds </span>'.
5260                       ' and '.
5261                       compute_commands_count().
5262                       " to generate.\n";
5263                 print "</div>\n"; # class="page_footer"
5264         }
5265
5266         if (defined $site_footer && -f $site_footer) {
5267                 insert_file($site_footer);
5268         }
5269
5270         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
5271         if (defined $action &&
5272             $action eq 'blame_incremental') {
5273                 print qq!<script type="text/javascript">\n!.
5274                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
5275                       qq!           "!. href() .qq!");\n!.
5276                       qq!</script>\n!;
5277         } else {
5278                 my ($jstimezone, $tz_cookie, $datetime_class) =
5279                         gitweb_get_feature('javascript-timezone');
5280
5281                 print qq!<script type="text/javascript">\n!.
5282                       qq!window.onload = function () {\n!;
5283                 if (gitweb_check_feature('blame_incremental')) {
5284                         print qq!       fixBlameLinks();\n!;
5285                 }
5286                 if (gitweb_check_feature('javascript-actions')) {
5287                         print qq!       fixLinks();\n!;
5288                 }
5289                 if ($jstimezone && $tz_cookie && $datetime_class) {
5290                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
5291                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
5292                 }
5293                 print qq!};\n!.
5294                       qq!</script>\n!;
5295         }
5296
5297         print "</body>\n" .
5298               "</html>";
5299 }
5300
5301 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
5302 # Example: die_error(404, 'Hash not found')
5303 # By convention, use the following status codes (as defined in RFC 2616):
5304 # 400: Invalid or missing CGI parameters, or
5305 #      requested object exists but has wrong type.
5306 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
5307 #      this server or project.
5308 # 404: Requested object/revision/project doesn't exist.
5309 # 500: The server isn't configured properly, or
5310 #      an internal error occurred (e.g. failed assertions caused by bugs), or
5311 #      an unknown error occurred (e.g. the git binary died unexpectedly).
5312 # 503: The server is currently unavailable (because it is overloaded,
5313 #      or down for maintenance).  Generally, this is a temporary state.
5314 sub die_error {
5315         my $status = shift || 500;
5316         my $error = esc_html(shift) || "Internal Server Error";
5317         my $extra = shift;
5318         my %opts = @_;
5319
5320         my %http_responses = (
5321                 400 => '400 Bad Request',
5322                 403 => '403 Forbidden',
5323                 404 => '404 Not Found',
5324                 500 => '500 Internal Server Error',
5325                 503 => '503 Service Unavailable',
5326         );
5327         git_header_html($http_responses{$status}, undef, %opts);
5328         print <<EOF;
5329 <div class="page_body">
5330 <br /><br />
5331 $status - $error
5332 <br />
5333 EOF
5334         if (defined $extra) {
5335                 print "<hr />\n" .
5336                       "$extra\n";
5337         }
5338         print "</div>\n";
5339
5340         git_footer_html();
5341         CORE::die
5342                 unless ($opts{'-error_handler'});
5343 }
5344
5345 ## ----------------------------------------------------------------------
5346 ## functions printing or outputting HTML: navigation
5347
5348 sub git_print_page_nav {
5349         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
5350         $extra = '' if !defined $extra; # pager or formats
5351
5352         my @navs = qw(summary log commit commitdiff tree refs);
5353         if ($suppress) {
5354                 my %omit;
5355                 if (ref($suppress) eq 'ARRAY') {
5356                         %omit = map { ($_ => 1) } @$suppress;
5357                 } else {
5358                         %omit = ($suppress => 1);
5359                 }
5360                 @navs = grep { !$omit{$_} } @navs;
5361         }
5362
5363         my %arg = map { $_ => {action=>$_} } @navs;
5364         if (defined $head) {
5365                 for (qw(commit commitdiff)) {
5366                         $arg{$_}{'hash'} = $head;
5367                 }
5368                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
5369                         $arg{'log'}{'hash'} = $head;
5370                 }
5371         }
5372
5373         $arg{'log'}{'action'} = 'shortlog';
5374         if ($current eq 'log') {
5375                 $current = 'shortlog';
5376         } elsif ($current eq 'shortlog') {
5377                 $current = 'log';
5378         }
5379         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
5380         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
5381
5382         my @actions = gitweb_get_feature('actions');
5383         my $escname = $project;
5384         $escname =~ s/[+]/%2B/g;
5385         my %repl = (
5386                 '%' => '%',
5387                 'n' => $project,         # project name
5388                 'f' => $git_dir,         # project path within filesystem
5389                 'h' => $treehead || '',  # current hash ('h' parameter)
5390                 'b' => $treebase || '',  # hash base ('hb' parameter)
5391                 'e' => $escname,         # project name with '+' escaped
5392         );
5393         while (@actions) {
5394                 my ($label, $link, $pos) = splice(@actions,0,3);
5395                 # insert
5396                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
5397                 # munch munch
5398                 $link =~ s/%([%nfhbe])/$repl{$1}/g;
5399                 $arg{$label}{'_href'} = $link;
5400         }
5401
5402         print "<div class=\"page_nav\">\n" .
5403                 (join " | ",
5404                  map { $_ eq $current ?
5405                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
5406                  } @navs);
5407         print "<br/>\n$extra<br/>\n" .
5408               "</div>\n";
5409 }
5410
5411 # returns a submenu for the nagivation of the refs views (tags, heads,
5412 # remotes) with the current view disabled and the remotes view only
5413 # available if the feature is enabled
5414 sub format_ref_views {
5415         my ($current) = @_;
5416         my @ref_views = qw{tags heads};
5417         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
5418         return join " | ", map {
5419                 $_ eq $current ? $_ :
5420                 $cgi->a({-href => href(action=>$_)}, $_)
5421         } @ref_views
5422 }
5423
5424 sub format_paging_nav {
5425         my ($action, $page, $has_next_link) = @_;
5426         my $paging_nav;
5427
5428
5429         if ($page > 0) {
5430                 $paging_nav .=
5431                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
5432                         " &#183; " .
5433                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5434                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5435         } else {
5436                 $paging_nav .= "first &#183; prev";
5437         }
5438
5439         if ($has_next_link) {
5440                 $paging_nav .= " &#183; " .
5441                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5442                                  -accesskey => "n", -title => "Alt-n"}, "next");
5443         } else {
5444                 $paging_nav .= " &#183; next";
5445         }
5446
5447         return $paging_nav;
5448 }
5449
5450 sub format_log_nav {
5451         my ($action, $page, $has_next_link) = @_;
5452         my $paging_nav;
5453
5454         if ($action eq 'shortlog') {
5455                 $paging_nav .= 'shortlog';
5456         } else {
5457                 $paging_nav .= $cgi->a({-href => href(action=>'shortlog', -replay=>1)}, 'shortlog');
5458         }
5459         $paging_nav .= ' | ';
5460         if ($action eq 'log') {
5461                 $paging_nav .= 'fulllog';
5462         } else {
5463                 $paging_nav .= $cgi->a({-href => href(action=>'log', -replay=>1)}, 'fulllog');
5464         }
5465
5466         $paging_nav .= " | " . format_paging_nav($action, $page, $has_next_link);
5467         return $paging_nav;
5468 }
5469
5470 ## ......................................................................
5471 ## functions printing or outputting HTML: div
5472
5473 sub git_print_header_div {
5474         my ($action, $title, $hash, $hash_base, $extra) = @_;
5475         my %args = ();
5476         defined $extra or $extra = '';
5477
5478         $args{'action'} = $action;
5479         $args{'hash'} = $hash if $hash;
5480         $args{'hash_base'} = $hash_base if $hash_base;
5481
5482         my $link1 = $cgi->a({-href => href(%args), -class => "title"},
5483                             $title ? $title : $action);
5484         my $link2 = $cgi->a({-href => href(%args), -class => "cover"}, "");
5485         print "<div class=\"header\">\n" . '<span class="title">' .
5486               $link1 . $extra . $link2 . '</span>' . "\n</div>\n";
5487 }
5488
5489 sub format_repo_url {
5490         my ($name, $url) = @_;
5491         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
5492 }
5493
5494 # Group output by placing it in a DIV element and adding a header.
5495 # Options for start_div() can be provided by passing a hash reference as the
5496 # first parameter to the function.
5497 # Options to git_print_header_div() can be provided by passing an array
5498 # reference. This must follow the options to start_div if they are present.
5499 # The content can be a scalar, which is output as-is, a scalar reference, which
5500 # is output after html escaping, an IO handle passed either as *handle or
5501 # *handle{IO}, or a function reference. In the latter case all following
5502 # parameters will be taken as argument to the content function call.
5503 sub git_print_section {
5504         my ($div_args, $header_args, $content);
5505         my $arg = shift;
5506         if (ref($arg) eq 'HASH') {
5507                 $div_args = $arg;
5508                 $arg = shift;
5509         }
5510         if (ref($arg) eq 'ARRAY') {
5511                 $header_args = $arg;
5512                 $arg = shift;
5513         }
5514         $content = $arg;
5515
5516         print $cgi->start_div($div_args);
5517         git_print_header_div(@$header_args);
5518
5519         if (ref($content) eq 'CODE') {
5520                 $content->(@_);
5521         } elsif (ref($content) eq 'SCALAR') {
5522                 print esc_html($$content);
5523         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
5524                 while (<$content>) {
5525                         print to_utf8($_);
5526                 }
5527         } elsif (!ref($content) && defined($content)) {
5528                 print $content;
5529         }
5530
5531         print $cgi->end_div;
5532 }
5533
5534 sub format_timestamp_html {
5535         my $date = shift;
5536         my $useatnight = shift;
5537         defined($useatnight) or $useatnight = 1;
5538         my $strtime = $date->{'rfc2822'};
5539
5540         my (undef, undef, $datetime_class) =
5541                 gitweb_get_feature('javascript-timezone');
5542         if ($datetime_class) {
5543                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
5544         }
5545
5546         my $localtime_format = '(%d %02d:%02d %s)';
5547         if ($useatnight && $date->{'hour_local'} < 6) {
5548                 $localtime_format = '(%d <span class="atnight">%02d:%02d</span> %s)';
5549         }
5550         $strtime .= ' ' .
5551                     sprintf($localtime_format, $date->{'mday_local'},
5552                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
5553
5554         return $strtime;
5555 }
5556
5557 sub format_lastrefresh_row {
5558         return "<?gitweb format_lastrefresh_row?>" if $cache_mode_active;
5559         my %rd = parse_file_date('.last_refresh');
5560         if (defined $rd{'rfc2822'}) {
5561                 return "<tr id=\"metadata_lrefresh\"><td>last&#160;refresh</td>" .
5562                        "<td>".format_timestamp_html(\%rd,0)."</td></tr>";
5563         }
5564         return "";
5565 }
5566
5567 # Outputs the author name and date in long form
5568 sub git_print_authorship {
5569         my $co = shift;
5570         my %opts = @_;
5571         my $tag = $opts{-tag} || 'div';
5572         my $author = $co->{'author_name'};
5573
5574         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
5575         print "<$tag class=\"author_date\">" .
5576               format_search_author($author, "author", esc_html($author)) .
5577               " [".format_timestamp_html(\%ad)."]".
5578               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
5579               "</$tag>\n";
5580 }
5581
5582 # Outputs table rows containing the full author or committer information,
5583 # in the format expected for 'commit' view (& similar).
5584 # Parameters are a commit hash reference, followed by the list of people
5585 # to output information for. If the list is empty it defaults to both
5586 # author and committer.
5587 sub git_print_authorship_rows {
5588         my $co = shift;
5589         # too bad we can't use @people = @_ || ('author', 'committer')
5590         my @people = @_;
5591         @people = ('author', 'committer') unless @people;
5592         foreach my $who (@people) {
5593                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
5594                 print "<tr><td>$who</td><td>" .
5595                       format_search_author($co->{"${who}_name"}, $who,
5596                                            esc_html($co->{"${who}_name"})) . " " .
5597                       format_search_author($co->{"${who}_email"}, $who,
5598                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
5599                       "</td><td rowspan=\"2\">" .
5600                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
5601                       "</td></tr>\n" .
5602                       "<tr>" .
5603                       "<td></td><td>" .
5604                       format_timestamp_html(\%wd) .
5605                       "</td>" .
5606                       "</tr>\n";
5607         }
5608 }
5609
5610 sub git_print_page_path {
5611         my $name = shift;
5612         my $type = shift;
5613         my $hb = shift;
5614
5615
5616         print "<div class=\"page_path\">";
5617         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
5618                       -title => 'tree root'}, to_utf8("[$project]"));
5619         print " / ";
5620         if (defined $name) {
5621                 my @dirname = split '/', $name;
5622                 my $basename = pop @dirname;
5623                 my $fullname = '';
5624
5625                 foreach my $dir (@dirname) {
5626                         $fullname .= ($fullname ? '/' : '') . $dir;
5627                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
5628                                                      hash_base=>$hb),
5629                                       -title => $fullname}, esc_path($dir));
5630                         print " / ";
5631                 }
5632                 if (defined $type && $type eq 'blob') {
5633                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
5634                                                      hash_base=>$hb),
5635                                       -title => $name}, esc_path($basename));
5636                 } elsif (defined $type && $type eq 'tree') {
5637                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
5638                                                      hash_base=>$hb),
5639                                       -title => $name}, esc_path($basename));
5640                         print " / ";
5641                 } else {
5642                         print esc_path($basename);
5643                 }
5644         }
5645         print "<br/></div>\n";
5646 }
5647
5648 sub git_print_log {
5649         my $log = shift;
5650         my %opts = @_;
5651
5652         if ($opts{'-remove_title'}) {
5653                 # remove title, i.e. first line of log
5654                 shift @$log;
5655         }
5656         # remove leading empty lines
5657         while (defined $log->[0] && $log->[0] eq "") {
5658                 shift @$log;
5659         }
5660
5661         # print log
5662         my $skip_blank_line = 0;
5663         foreach my $line (@$log) {
5664                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
5665                         if (! $opts{'-remove_signoff'}) {
5666                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
5667                                 $skip_blank_line = 1;
5668                         }
5669                         next;
5670                 }
5671
5672                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
5673                         if (! $opts{'-remove_signoff'}) {
5674                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
5675                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
5676                                         "</span><br/>\n";
5677                                 $skip_blank_line = 1;
5678                         }
5679                         next;
5680                 }
5681
5682                 # print only one empty line
5683                 # do not print empty line after signoff
5684                 if ($line eq "") {
5685                         next if ($skip_blank_line);
5686                         $skip_blank_line = 1;
5687                 } else {
5688                         $skip_blank_line = 0;
5689                 }
5690
5691                 print format_log_line_html($line) . "<br/>\n";
5692         }
5693
5694         if ($opts{'-final_empty_line'}) {
5695                 # end with single empty line
5696                 print "<br/>\n" unless $skip_blank_line;
5697         }
5698 }
5699
5700 # return link target (what link points to)
5701 sub git_get_link_target {
5702         my $hash = shift;
5703         my $link_target;
5704
5705         # read link
5706         defined(my $fd = git_cmd_pipe "cat-file", "blob", $hash)
5707                 or return;
5708         {
5709                 local $/ = undef;
5710                 $link_target = to_utf8(scalar <$fd>);
5711         }
5712         close $fd
5713                 or return;
5714
5715         return $link_target;
5716 }
5717
5718 # given link target, and the directory (basedir) the link is in,
5719 # return target of link relative to top directory (top tree);
5720 # return undef if it is not possible (including absolute links).
5721 sub normalize_link_target {
5722         my ($link_target, $basedir) = @_;
5723
5724         # absolute symlinks (beginning with '/') cannot be normalized
5725         return if (substr($link_target, 0, 1) eq '/');
5726
5727         # normalize link target to path from top (root) tree (dir)
5728         my $path;
5729         if ($basedir) {
5730                 $path = $basedir . '/' . $link_target;
5731         } else {
5732                 # we are in top (root) tree (dir)
5733                 $path = $link_target;
5734         }
5735
5736         # remove //, /./, and /../
5737         my @path_parts;
5738         foreach my $part (split('/', $path)) {
5739                 # discard '.' and ''
5740                 next if (!$part || $part eq '.');
5741                 # handle '..'
5742                 if ($part eq '..') {
5743                         if (@path_parts) {
5744                                 pop @path_parts;
5745                         } else {
5746                                 # link leads outside repository (outside top dir)
5747                                 return;
5748                         }
5749                 } else {
5750                         push @path_parts, $part;
5751                 }
5752         }
5753         $path = join('/', @path_parts);
5754
5755         return $path;
5756 }
5757
5758 # print tree entry (row of git_tree), but without encompassing <tr> element
5759 sub git_print_tree_entry {
5760         my ($t, $basedir, $hash_base, $have_blame) = @_;
5761
5762         my %base_key = ();
5763         $base_key{'hash_base'} = $hash_base if defined $hash_base;
5764
5765         # The format of a table row is: mode list link.  Where mode is
5766         # the mode of the entry, list is the name of the entry, an href,
5767         # and link is the action links of the entry.
5768
5769         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
5770         if (exists $t->{'size'}) {
5771                 print "<td class=\"size\">$t->{'size'}</td>\n";
5772         }
5773         if ($t->{'type'} eq "blob") {
5774                 print "<td class=\"list\">" .
5775                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
5776                                                file_name=>"$basedir$t->{'name'}", %base_key),
5777                                 -class => "list"}, esc_path($t->{'name'}));
5778                 if (S_ISLNK(oct $t->{'mode'})) {
5779                         my $link_target = git_get_link_target($t->{'hash'});
5780                         if ($link_target) {
5781                                 my $norm_target = normalize_link_target($link_target, $basedir);
5782                                 if (defined $norm_target) {
5783                                         print " -> " .
5784                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
5785                                                                      file_name=>$norm_target),
5786                                                        -title => $norm_target}, esc_path($link_target));
5787                                 } else {
5788                                         print " -> " . esc_path($link_target);
5789                                 }
5790                         }
5791                 }
5792                 print "</td>\n";
5793                 print "<td class=\"link\">";
5794                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
5795                                              file_name=>"$basedir$t->{'name'}", %base_key)},
5796                               "blob");
5797                 if ($have_blame) {
5798                         print " | " .
5799                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
5800                                                      file_name=>"$basedir$t->{'name'}", %base_key),
5801                                       -class => "blamelink"},
5802                                       "blame");
5803                 }
5804                 if (defined $hash_base) {
5805                         print " | " .
5806                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
5807                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
5808                                       "history");
5809                 }
5810                 print " | " .
5811                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
5812                                                file_name=>"$basedir$t->{'name'}")},
5813                                 "raw");
5814                 print "</td>\n";
5815
5816         } elsif ($t->{'type'} eq "tree") {
5817                 print "<td class=\"list\">";
5818                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
5819                                              file_name=>"$basedir$t->{'name'}",
5820                                              %base_key)},
5821                               esc_path($t->{'name'}));
5822                 print "</td>\n";
5823                 print "<td class=\"link\">";
5824                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
5825                                              file_name=>"$basedir$t->{'name'}",
5826                                              %base_key)},
5827                               "tree");
5828                 if (defined $hash_base) {
5829                         print " | " .
5830                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
5831                                                      file_name=>"$basedir$t->{'name'}")},
5832                                       "history");
5833                 }
5834                 print "</td>\n";
5835         } else {
5836                 # unknown object: we can only present history for it
5837                 # (this includes 'commit' object, i.e. submodule support)
5838                 print "<td class=\"list\">" .
5839                       esc_path($t->{'name'}) .
5840                       "</td>\n";
5841                 print "<td class=\"link\">";
5842                 if (defined $hash_base) {
5843                         print $cgi->a({-href => href(action=>"history",
5844                                                      hash_base=>$hash_base,
5845                                                      file_name=>"$basedir$t->{'name'}")},
5846                                       "history");
5847                 }
5848                 print "</td>\n";
5849         }
5850 }
5851
5852 ## ......................................................................
5853 ## functions printing large fragments of HTML
5854
5855 # get pre-image filenames for merge (combined) diff
5856 sub fill_from_file_info {
5857         my ($diff, @parents) = @_;
5858
5859         $diff->{'from_file'} = [ ];
5860         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
5861         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
5862                 if ($diff->{'status'}[$i] eq 'R' ||
5863                     $diff->{'status'}[$i] eq 'C') {
5864                         $diff->{'from_file'}[$i] =
5865                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
5866                 }
5867         }
5868
5869         return $diff;
5870 }
5871
5872 # is current raw difftree line of file deletion
5873 sub is_deleted {
5874         my $diffinfo = shift;
5875
5876         return $diffinfo->{'to_id'} eq ('0' x 40);
5877 }
5878
5879 # does patch correspond to [previous] difftree raw line
5880 # $diffinfo  - hashref of parsed raw diff format
5881 # $patchinfo - hashref of parsed patch diff format
5882 #              (the same keys as in $diffinfo)
5883 sub is_patch_split {
5884         my ($diffinfo, $patchinfo) = @_;
5885
5886         return defined $diffinfo && defined $patchinfo
5887                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
5888 }
5889
5890
5891 sub git_difftree_body {
5892         my ($difftree, $hash, @parents) = @_;
5893         my ($parent) = $parents[0];
5894         my $have_blame = gitweb_check_feature('blame');
5895         print "<div class=\"list_head\">\n";
5896         if ($#{$difftree} > 10) {
5897                 print(($#{$difftree} + 1) . " files changed:\n");
5898         }
5899         print "</div>\n";
5900
5901         print "<table class=\"" .
5902               (@parents > 1 ? "combined " : "") .
5903               "diff_tree\">\n";
5904
5905         # header only for combined diff in 'commitdiff' view
5906         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
5907         if ($has_header) {
5908                 # table header
5909                 print "<thead><tr>\n" .
5910                        "<th></th><th></th>\n"; # filename, patchN link
5911                 for (my $i = 0; $i < @parents; $i++) {
5912                         my $par = $parents[$i];
5913                         print "<th>" .
5914                               $cgi->a({-href => href(action=>"commitdiff",
5915                                                      hash=>$hash, hash_parent=>$par),
5916                                        -title => 'commitdiff to parent number ' .
5917                                                   ($i+1) . ': ' . substr($par,0,7)},
5918                                       $i+1) .
5919                               "&#160;</th>\n";
5920                 }
5921                 print "</tr></thead>\n<tbody>\n";
5922         }
5923
5924         my $alternate = 1;
5925         my $patchno = 0;
5926         foreach my $line (@{$difftree}) {
5927                 my $diff = parsed_difftree_line($line);
5928
5929                 if ($alternate) {
5930                         print "<tr class=\"dark\">\n";
5931                 } else {
5932                         print "<tr class=\"light\">\n";
5933                 }
5934                 $alternate ^= 1;
5935
5936                 if (exists $diff->{'nparents'}) { # combined diff
5937
5938                         fill_from_file_info($diff, @parents)
5939                                 unless exists $diff->{'from_file'};
5940
5941                         if (!is_deleted($diff)) {
5942                                 # file exists in the result (child) commit
5943                                 print "<td>" .
5944                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5945                                                              file_name=>$diff->{'to_file'},
5946                                                              hash_base=>$hash),
5947                                               -class => "list"}, esc_path($diff->{'to_file'})) .
5948                                       "</td>\n";
5949                         } else {
5950                                 print "<td>" .
5951                                       esc_path($diff->{'to_file'}) .
5952                                       "</td>\n";
5953                         }
5954
5955                         if ($action eq 'commitdiff') {
5956                                 # link to patch
5957                                 $patchno++;
5958                                 print "<td class=\"link\">" .
5959                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
5960                                               "patch") .
5961                                       " | " .
5962                                       "</td>\n";
5963                         }
5964
5965                         my $has_history = 0;
5966                         my $not_deleted = 0;
5967                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
5968                                 my $hash_parent = $parents[$i];
5969                                 my $from_hash = $diff->{'from_id'}[$i];
5970                                 my $from_path = $diff->{'from_file'}[$i];
5971                                 my $status = $diff->{'status'}[$i];
5972
5973                                 $has_history ||= ($status ne 'A');
5974                                 $not_deleted ||= ($status ne 'D');
5975
5976                                 if ($status eq 'A') {
5977                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
5978                                 } elsif ($status eq 'D') {
5979                                         print "<td class=\"link\">" .
5980                                               $cgi->a({-href => href(action=>"blob",
5981                                                                      hash_base=>$hash,
5982                                                                      hash=>$from_hash,
5983                                                                      file_name=>$from_path)},
5984                                                       "blob" . ($i+1)) .
5985                                               " | </td>\n";
5986                                 } else {
5987                                         if ($diff->{'to_id'} eq $from_hash) {
5988                                                 print "<td class=\"link nochange\">";
5989                                         } else {
5990                                                 print "<td class=\"link\">";
5991                                         }
5992                                         print $cgi->a({-href => href(action=>"blobdiff",
5993                                                                      hash=>$diff->{'to_id'},
5994                                                                      hash_parent=>$from_hash,
5995                                                                      hash_base=>$hash,
5996                                                                      hash_parent_base=>$hash_parent,
5997                                                                      file_name=>$diff->{'to_file'},
5998                                                                      file_parent=>$from_path)},
5999                                                       "diff" . ($i+1)) .
6000                                               " | </td>\n";
6001                                 }
6002                         }
6003
6004                         print "<td class=\"link\">";
6005                         if ($not_deleted) {
6006                                 print $cgi->a({-href => href(action=>"blob",
6007                                                              hash=>$diff->{'to_id'},
6008                                                              file_name=>$diff->{'to_file'},
6009                                                              hash_base=>$hash)},
6010                                               "blob");
6011                                 print " | " if ($has_history);
6012                         }
6013                         if ($has_history) {
6014                                 print $cgi->a({-href => href(action=>"history",
6015                                                              file_name=>$diff->{'to_file'},
6016                                                              hash_base=>$hash)},
6017                                               "history");
6018                         }
6019                         print "</td>\n";
6020
6021                         print "</tr>\n";
6022                         next; # instead of 'else' clause, to avoid extra indent
6023                 }
6024                 # else ordinary diff
6025
6026                 my ($to_mode_oct, $to_mode_str, $to_file_type);
6027                 my ($from_mode_oct, $from_mode_str, $from_file_type);
6028                 if ($diff->{'to_mode'} ne ('0' x 6)) {
6029                         $to_mode_oct = oct $diff->{'to_mode'};
6030                         if (S_ISREG($to_mode_oct)) { # only for regular file
6031                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
6032                         }
6033                         $to_file_type = file_type($diff->{'to_mode'});
6034                 }
6035                 if ($diff->{'from_mode'} ne ('0' x 6)) {
6036                         $from_mode_oct = oct $diff->{'from_mode'};
6037                         if (S_ISREG($from_mode_oct)) { # only for regular file
6038                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
6039                         }
6040                         $from_file_type = file_type($diff->{'from_mode'});
6041                 }
6042
6043                 if ($diff->{'status'} eq "A") { # created
6044                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
6045                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
6046                         $mode_chng   .= "]</span>";
6047                         print "<td>";
6048                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
6049                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
6050                                       -class => "list"}, esc_path($diff->{'file'}));
6051                         print "</td>\n";
6052                         print "<td>$mode_chng</td>\n";
6053                         print "<td class=\"link\">";
6054                         if ($action eq 'commitdiff') {
6055                                 # link to patch
6056                                 $patchno++;
6057                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
6058                                               "patch") .
6059                                       " | ";
6060                         }
6061                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
6062                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
6063                                       "blob");
6064                         print "</td>\n";
6065
6066                 } elsif ($diff->{'status'} eq "D") { # deleted
6067                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
6068                         print "<td>";
6069                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
6070                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
6071                                        -class => "list"}, esc_path($diff->{'file'}));
6072                         print "</td>\n";
6073                         print "<td>$mode_chng</td>\n";
6074                         print "<td class=\"link\">";
6075                         if ($action eq 'commitdiff') {
6076                                 # link to patch
6077                                 $patchno++;
6078                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
6079                                               "patch") .
6080                                       " | ";
6081                         }
6082                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
6083                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
6084                                       "blob") . " | ";
6085                         if ($have_blame) {
6086                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
6087                                                              file_name=>$diff->{'file'}),
6088                                               -class => "blamelink"},
6089                                               "blame") . " | ";
6090                         }
6091                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
6092                                                      file_name=>$diff->{'file'})},
6093                                       "history");
6094                         print "</td>\n";
6095
6096                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
6097                         my $mode_chnge = "";
6098                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
6099                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
6100                                 if ($from_file_type ne $to_file_type) {
6101                                         $mode_chnge .= " from $from_file_type to $to_file_type";
6102                                 }
6103                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
6104                                         if ($from_mode_str && $to_mode_str) {
6105                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
6106                                         } elsif ($to_mode_str) {
6107                                                 $mode_chnge .= " mode: $to_mode_str";
6108                                         }
6109                                 }
6110                                 $mode_chnge .= "]</span>\n";
6111                         }
6112                         print "<td>";
6113                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
6114                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
6115                                       -class => "list"}, esc_path($diff->{'file'}));
6116                         print "</td>\n";
6117                         print "<td>$mode_chnge</td>\n";
6118                         print "<td class=\"link\">";
6119                         if ($action eq 'commitdiff') {
6120                                 # link to patch
6121                                 $patchno++;
6122                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
6123                                               "patch") .
6124                                       " | ";
6125                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
6126                                 # "commit" view and modified file (not onlu mode changed)
6127                                 print $cgi->a({-href => href(action=>"blobdiff",
6128                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
6129                                                              hash_base=>$hash, hash_parent_base=>$parent,
6130                                                              file_name=>$diff->{'file'})},
6131                                               "diff") .
6132                                       " | ";
6133                         }
6134                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
6135                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
6136                                        "blob") . " | ";
6137                         if ($have_blame) {
6138                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
6139                                                              file_name=>$diff->{'file'}),
6140                                               -class => "blamelink"},
6141                                               "blame") . " | ";
6142                         }
6143                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
6144                                                      file_name=>$diff->{'file'})},
6145                                       "history");
6146                         print "</td>\n";
6147
6148                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
6149                         my %status_name = ('R' => 'moved', 'C' => 'copied');
6150                         my $nstatus = $status_name{$diff->{'status'}};
6151                         my $mode_chng = "";
6152                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
6153                                 # mode also for directories, so we cannot use $to_mode_str
6154                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
6155                         }
6156                         print "<td>" .
6157                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
6158                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
6159                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
6160                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
6161                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
6162                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
6163                                       -class => "list"}, esc_path($diff->{'from_file'})) .
6164                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
6165                               "<td class=\"link\">";
6166                         if ($action eq 'commitdiff') {
6167                                 # link to patch
6168                                 $patchno++;
6169                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
6170                                               "patch") .
6171                                       " | ";
6172                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
6173                                 # "commit" view and modified file (not only pure rename or copy)
6174                                 print $cgi->a({-href => href(action=>"blobdiff",
6175                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
6176                                                              hash_base=>$hash, hash_parent_base=>$parent,
6177                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
6178                                               "diff") .
6179                                       " | ";
6180                         }
6181                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
6182                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
6183                                       "blob") . " | ";
6184                         if ($have_blame) {
6185                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
6186                                                              file_name=>$diff->{'to_file'}),
6187                                               -class => "blamelink"},
6188                                               "blame") . " | ";
6189                         }
6190                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
6191                                                     file_name=>$diff->{'to_file'})},
6192                                       "history");
6193                         print "</td>\n";
6194
6195                 } # we should not encounter Unmerged (U) or Unknown (X) status
6196                 print "</tr>\n";
6197         }
6198         print "</tbody>" if $has_header;
6199         print "</table>\n";
6200 }
6201
6202 # Print context lines and then rem/add lines in a side-by-side manner.
6203 sub print_sidebyside_diff_lines {
6204         my ($ctx, $rem, $add) = @_;
6205
6206         # print context block before add/rem block
6207         if (@$ctx) {
6208                 print join '',
6209                         '<div class="chunk_block ctx">',
6210                                 '<div class="old">',
6211                                 @$ctx,
6212                                 '</div>',
6213                                 '<div class="new">',
6214                                 @$ctx,
6215                                 '</div>',
6216                         '</div>';
6217         }
6218
6219         if (!@$add) {
6220                 # pure removal
6221                 print join '',
6222                         '<div class="chunk_block rem">',
6223                                 '<div class="old">',
6224                                 @$rem,
6225                                 '</div>',
6226                         '</div>';
6227         } elsif (!@$rem) {
6228                 # pure addition
6229                 print join '',
6230                         '<div class="chunk_block add">',
6231                                 '<div class="new">',
6232                                 @$add,
6233                                 '</div>',
6234                         '</div>';
6235         } else {
6236                 print join '',
6237                         '<div class="chunk_block chg">',
6238                                 '<div class="old">',
6239                                 @$rem,
6240                                 '</div>',
6241                                 '<div class="new">',
6242                                 @$add,
6243                                 '</div>',
6244                         '</div>';
6245         }
6246 }
6247
6248 # Print context lines and then rem/add lines in inline manner.
6249 sub print_inline_diff_lines {
6250         my ($ctx, $rem, $add) = @_;
6251
6252         print @$ctx, @$rem, @$add;
6253 }
6254
6255 # Format removed and added line, mark changed part and HTML-format them.
6256 # Implementation is based on contrib/diff-highlight
6257 sub format_rem_add_lines_pair {
6258         my ($rem, $add, $num_parents) = @_;
6259
6260         # We need to untabify lines before split()'ing them;
6261         # otherwise offsets would be invalid.
6262         chomp $rem;
6263         chomp $add;
6264         $rem = untabify($rem);
6265         $add = untabify($add);
6266
6267         my @rem = split(//, $rem);
6268         my @add = split(//, $add);
6269         my ($esc_rem, $esc_add);
6270         # Ignore leading +/- characters for each parent.
6271         my ($prefix_len, $suffix_len) = ($num_parents, 0);
6272         my ($prefix_has_nonspace, $suffix_has_nonspace);
6273
6274         my $shorter = (@rem < @add) ? @rem : @add;
6275         while ($prefix_len < $shorter) {
6276                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
6277
6278                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
6279                 $prefix_len++;
6280         }
6281
6282         while ($prefix_len + $suffix_len < $shorter) {
6283                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
6284
6285                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
6286                 $suffix_len++;
6287         }
6288
6289         # Mark lines that are different from each other, but have some common
6290         # part that isn't whitespace.  If lines are completely different, don't
6291         # mark them because that would make output unreadable, especially if
6292         # diff consists of multiple lines.
6293         if ($prefix_has_nonspace || $suffix_has_nonspace) {
6294                 $esc_rem = esc_html_hl_regions($rem, 'marked',
6295                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
6296                 $esc_add = esc_html_hl_regions($add, 'marked',
6297                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
6298         } else {
6299                 $esc_rem = esc_html($rem, -nbsp=>1);
6300                 $esc_add = esc_html($add, -nbsp=>1);
6301         }
6302
6303         return format_diff_line(\$esc_rem, 'rem'),
6304                format_diff_line(\$esc_add, 'add');
6305 }
6306
6307 # HTML-format diff context, removed and added lines.
6308 sub format_ctx_rem_add_lines {
6309         my ($ctx, $rem, $add, $num_parents) = @_;
6310         my (@new_ctx, @new_rem, @new_add);
6311         my $can_highlight = 0;
6312         my $is_combined = ($num_parents > 1);
6313
6314         # Highlight if every removed line has a corresponding added line.
6315         if (@$add > 0 && @$add == @$rem) {
6316                 $can_highlight = 1;
6317
6318                 # Highlight lines in combined diff only if the chunk contains
6319                 # diff between the same version, e.g.
6320                 #
6321                 #    - a
6322                 #   -  b
6323                 #    + c
6324                 #   +  d
6325                 #
6326                 # Otherwise the highlightling would be confusing.
6327                 if ($is_combined) {
6328                         for (my $i = 0; $i < @$add; $i++) {
6329                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
6330                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
6331
6332                                 $prefix_rem =~ s/-/+/g;
6333
6334                                 if ($prefix_rem ne $prefix_add) {
6335                                         $can_highlight = 0;
6336                                         last;
6337                                 }
6338                         }
6339                 }
6340         }
6341
6342         if ($can_highlight) {
6343                 for (my $i = 0; $i < @$add; $i++) {
6344                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
6345                                 $rem->[$i], $add->[$i], $num_parents);
6346                         push @new_rem, $line_rem;
6347                         push @new_add, $line_add;
6348                 }
6349         } else {
6350                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
6351                 @new_add = map { format_diff_line($_, 'add') } @$add;
6352         }
6353
6354         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
6355
6356         return (\@new_ctx, \@new_rem, \@new_add);
6357 }
6358
6359 # Print context lines and then rem/add lines.
6360 sub print_diff_lines {
6361         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
6362         my $is_combined = $num_parents > 1;
6363
6364         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
6365                 $num_parents);
6366
6367         if ($diff_style eq 'sidebyside' && !$is_combined) {
6368                 print_sidebyside_diff_lines($ctx, $rem, $add);
6369         } else {
6370                 # default 'inline' style and unknown styles
6371                 print_inline_diff_lines($ctx, $rem, $add);
6372         }
6373 }
6374
6375 sub print_diff_chunk {
6376         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
6377         my (@ctx, @rem, @add);
6378
6379         # The class of the previous line.
6380         my $prev_class = '';
6381
6382         return unless @chunk;
6383
6384         # incomplete last line might be among removed or added lines,
6385         # or both, or among context lines: find which
6386         for (my $i = 1; $i < @chunk; $i++) {
6387                 if ($chunk[$i][0] eq 'incomplete') {
6388                         $chunk[$i][0] = $chunk[$i-1][0];
6389                 }
6390         }
6391
6392         # guardian
6393         push @chunk, ["", ""];
6394
6395         foreach my $line_info (@chunk) {
6396                 my ($class, $line) = @$line_info;
6397
6398                 # print chunk headers
6399                 if ($class && $class eq 'chunk_header') {
6400                         print format_diff_line($line, $class, $from, $to);
6401                         next;
6402                 }
6403
6404                 ## print from accumulator when have some add/rem lines or end
6405                 # of chunk (flush context lines), or when have add and rem
6406                 # lines and new block is reached (otherwise add/rem lines could
6407                 # be reordered)
6408                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
6409                     (@rem && @add && $class ne $prev_class)) {
6410                         print_diff_lines(\@ctx, \@rem, \@add,
6411                                          $diff_style, $num_parents);
6412                         @ctx = @rem = @add = ();
6413                 }
6414
6415                 ## adding lines to accumulator
6416                 # guardian value
6417                 last unless $line;
6418                 # rem, add or change
6419                 if ($class eq 'rem') {
6420                         push @rem, $line;
6421                 } elsif ($class eq 'add') {
6422                         push @add, $line;
6423                 }
6424                 # context line
6425                 if ($class eq 'ctx') {
6426                         push @ctx, $line;
6427                 }
6428
6429                 $prev_class = $class;
6430         }
6431 }
6432
6433 sub git_patchset_body {
6434         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
6435         my ($hash_parent) = $hash_parents[0];
6436
6437         my $is_combined = (@hash_parents > 1);
6438         my $patch_idx = 0;
6439         my $patch_number = 0;
6440         my $patch_line;
6441         my $diffinfo;
6442         my $to_name;
6443         my (%from, %to);
6444         my @chunk; # for side-by-side diff
6445
6446         print "<div class=\"patchset\">\n";
6447
6448         # skip to first patch
6449         while ($patch_line = to_utf8(scalar <$fd>)) {
6450                 chomp $patch_line;
6451
6452                 last if ($patch_line =~ m/^diff /);
6453         }
6454
6455  PATCH:
6456         while ($patch_line) {
6457
6458                 # parse "git diff" header line
6459                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
6460                         # $1 is from_name, which we do not use
6461                         $to_name = unquote($2);
6462                         $to_name =~ s!^b/!!;
6463                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
6464                         # $1 is 'cc' or 'combined', which we do not use
6465                         $to_name = unquote($2);
6466                 } else {
6467                         $to_name = undef;
6468                 }
6469
6470                 # check if current patch belong to current raw line
6471                 # and parse raw git-diff line if needed
6472                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
6473                         # this is continuation of a split patch
6474                         print "<div class=\"patch cont\">\n";
6475                 } else {
6476                         # advance raw git-diff output if needed
6477                         $patch_idx++ if defined $diffinfo;
6478
6479                         # read and prepare patch information
6480                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
6481
6482                         # compact combined diff output can have some patches skipped
6483                         # find which patch (using pathname of result) we are at now;
6484                         if ($is_combined) {
6485                                 while ($to_name ne $diffinfo->{'to_file'}) {
6486                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
6487                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
6488                                               "</div>\n";  # class="patch"
6489
6490                                         $patch_idx++;
6491                                         $patch_number++;
6492
6493                                         last if $patch_idx > $#$difftree;
6494                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
6495                                 }
6496                         }
6497
6498                         # modifies %from, %to hashes
6499                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
6500
6501                         # this is first patch for raw difftree line with $patch_idx index
6502                         # we index @$difftree array from 0, but number patches from 1
6503                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
6504                 }
6505
6506                 # git diff header
6507                 #assert($patch_line =~ m/^diff /) if DEBUG;
6508                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
6509                 $patch_number++;
6510                 # print "git diff" header
6511                 print format_git_diff_header_line($patch_line, $diffinfo,
6512                                                   \%from, \%to);
6513
6514                 # print extended diff header
6515                 print "<div class=\"diff extended_header\">\n";
6516         EXTENDED_HEADER:
6517                 while ($patch_line = to_utf8(scalar<$fd>)) {
6518                         chomp $patch_line;
6519
6520                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
6521
6522                         print format_extended_diff_header_line($patch_line, $diffinfo,
6523                                                                \%from, \%to);
6524                 }
6525                 print "</div>\n"; # class="diff extended_header"
6526
6527                 # from-file/to-file diff header
6528                 if (! $patch_line) {
6529                         print "</div>\n"; # class="patch"
6530                         last PATCH;
6531                 }
6532                 next PATCH if ($patch_line =~ m/^diff /);
6533                 #assert($patch_line =~ m/^---/) if DEBUG;
6534
6535                 my $last_patch_line = $patch_line;
6536                 $patch_line = to_utf8(scalar <$fd>);
6537                 chomp $patch_line;
6538                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
6539
6540                 print format_diff_from_to_header($last_patch_line, $patch_line,
6541                                                  $diffinfo, \%from, \%to,
6542                                                  @hash_parents);
6543
6544                 # the patch itself
6545         LINE:
6546                 while ($patch_line = to_utf8(scalar <$fd>)) {
6547                         chomp $patch_line;
6548
6549                         next PATCH if ($patch_line =~ m/^diff /);
6550
6551                         my $class = diff_line_class($patch_line, \%from, \%to);
6552
6553                         if ($class eq 'chunk_header') {
6554                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
6555                                 @chunk = ();
6556                         }
6557
6558                         push @chunk, [ $class, $patch_line ];
6559                 }
6560
6561         } continue {
6562                 if (@chunk) {
6563                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
6564                         @chunk = ();
6565                 }
6566                 print "</div>\n"; # class="patch"
6567         }
6568
6569         # for compact combined (--cc) format, with chunk and patch simplification
6570         # the patchset might be empty, but there might be unprocessed raw lines
6571         for (++$patch_idx if $patch_number > 0;
6572              $patch_idx < @$difftree;
6573              ++$patch_idx) {
6574                 # read and prepare patch information
6575                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
6576
6577                 # generate anchor for "patch" links in difftree / whatchanged part
6578                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
6579                       format_diff_cc_simplified($diffinfo, @hash_parents) .
6580                       "</div>\n";  # class="patch"
6581
6582                 $patch_number++;
6583         }
6584
6585         if ($patch_number == 0) {
6586                 if (@hash_parents > 1) {
6587                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
6588                 } else {
6589                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
6590                 }
6591         }
6592
6593         print "</div>\n"; # class="patchset"
6594 }
6595
6596 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6597
6598 sub git_project_search_form {
6599         my ($searchtext, $search_use_regexp) = @_;
6600
6601         my $limit = '';
6602         if ($project_filter) {
6603                 $limit = " in '$project_filter'";
6604         }
6605
6606         print "<div class=\"projsearch\">\n";
6607         print $cgi->start_form(-method => 'get', -action => $my_uri) .
6608               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
6609         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
6610                 if (defined $project_filter);
6611         print $cgi->textfield(-name => 's', -value => $searchtext,
6612                               -title => "Search project by name and description$limit",
6613                               -size => 60) . "\n" .
6614               "<span title=\"Extended regular expression\">" .
6615               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
6616                              -checked => $search_use_regexp) .
6617               "</span>\n" .
6618               $cgi->submit(-name => 'btnS', -value => 'Search') .
6619               $cgi->end_form() . "\n" .
6620               "<span class=\"projectlist_link\">" .
6621               $cgi->a({-href => href(project => undef, searchtext => undef,
6622                                      action => 'project_list',
6623                                      project_filter => $project_filter)},
6624                       esc_html("List all projects$limit")) . "</span><br />\n";
6625         print "<span class=\"projectlist_link\">" .
6626               $cgi->a({-href => href(project => undef, searchtext => undef,
6627                                      action => 'project_list',
6628                                      project_filter => undef)},
6629                       esc_html("List all projects")) . "</span>\n" if $project_filter;
6630         print "</div>\n";
6631 }
6632
6633 # entry for given @keys needs filling if at least one of keys in list
6634 # is not present in %$project_info
6635 sub project_info_needs_filling {
6636         my ($project_info, @keys) = @_;
6637
6638         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
6639         foreach my $key (@keys) {
6640                 if (!exists $project_info->{$key}) {
6641                         return 1;
6642                 }
6643         }
6644         return;
6645 }
6646
6647 sub git_cache_file_format {
6648         return GITWEB_CACHE_FORMAT .
6649                 (gitweb_check_feature('forks') ? " (forks)" : "");
6650 }
6651
6652 sub git_retrieve_cache_file {
6653         my $cache_file = shift;
6654
6655         use Storable qw(retrieve);
6656
6657         if ((my $dump = eval { retrieve($cache_file) })) {
6658                 return $$dump[1] if
6659                         ref($dump) eq 'ARRAY' &&
6660                         @$dump == 2 &&
6661                         ref($$dump[1]) eq 'ARRAY' &&
6662                         @{$$dump[1]} == 2 &&
6663                         ref(${$$dump[1]}[0]) eq 'ARRAY' &&
6664                         ref(${$$dump[1]}[1]) eq 'HASH' &&
6665                         $$dump[0] eq git_cache_file_format();
6666         }
6667
6668         return undef;
6669 }
6670
6671 sub git_store_cache_file {
6672         my ($cache_file, $cachedata) = @_;
6673
6674         use File::Basename qw(dirname);
6675         use File::stat;
6676         use POSIX qw(:fcntl_h);
6677         use Storable qw(store_fd);
6678
6679         my $result = undef;
6680         my $cache_d = dirname($cache_file);
6681         my $mask = umask();
6682         umask($mask & ~0070) if $cache_grpshared;
6683         if ((-d $cache_d || mkdir($cache_d, $cache_grpshared ? 0770 : 0700)) &&
6684             sysopen(my $fd, "$cache_file.lock", O_WRONLY|O_CREAT|O_EXCL, $cache_grpshared ? 0660 : 0600)) {
6685                 store_fd([git_cache_file_format(), $cachedata], $fd);
6686                 close $fd;
6687                 rename "$cache_file.lock", $cache_file;
6688                 $result = stat($cache_file)->mtime;
6689         }
6690         umask($mask) if $cache_grpshared;
6691         return $result;
6692 }
6693
6694 sub verify_cached_project {
6695         my ($hashref, $path) = @_;
6696         return undef unless $path;
6697         delete $$hashref{$path}, return undef unless is_valid_project($path);
6698         return $$hashref{$path} if exists $$hashref{$path};
6699
6700         # A valid project was requested but it's not yet in the cache
6701         # Manufacture a minimal project entry (path, name, description)
6702         # Also provide age, but only if it's available via $lastactivity_file
6703
6704         my %proj = ('path' => $path);
6705         my $val = git_get_project_description($path);
6706         defined $val or $val = '';
6707         $proj{'descr_long'} = $val;
6708         $proj{'descr'} = chop_str($val, $projects_list_description_width, 5);
6709         unless ($omit_owner) {
6710                 $val = git_get_project_owner($path);
6711                 defined $val or $val = '';
6712                 $proj{'owner'} = $val;
6713         }
6714         unless ($omit_age_column) {
6715                 ($val) = git_get_last_activity($path, 1);
6716                 $proj{'age_epoch'} = $val if defined $val;
6717         }
6718         $$hashref{$path} = \%proj;
6719         return \%proj;
6720 }
6721
6722 sub git_filter_cached_projects {
6723         my ($cache, $projlist, $verify) = @_;
6724         my $hashref = $$cache[1];
6725         my $sub = $verify ?
6726                 sub {verify_cached_project($hashref, $_[0])} :
6727                 sub {$$hashref{$_[0]}};
6728         return map {
6729                 my $c = &$sub($_->{'path'});
6730                 defined $c ? ($_ = $c) : ()
6731         } @$projlist;
6732 }
6733
6734 # fills project list info (age, description, owner, category, forks, etc.)
6735 # for each project in the list, removing invalid projects from
6736 # returned list, or fill only specified info.
6737 #
6738 # Invalid projects are removed from the returned list if and only if you
6739 # ask 'age_epoch' to be filled, because they are the only fields
6740 # that run unconditionally git command that requires repository, and
6741 # therefore do always check if project repository is invalid.
6742 #
6743 # USAGE:
6744 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
6745 #   ensures that 'descr_long' and 'ctags' fields are filled
6746 # * @project_list = fill_project_list_info(\@project_list)
6747 #   ensures that all fields are filled (and invalid projects removed)
6748 #
6749 # NOTE: modifies $projlist, but does not remove entries from it
6750 sub fill_project_list_info {
6751         my ($projlist, @wanted_keys) = @_;
6752
6753         my $rebuild = @wanted_keys && $wanted_keys[0] eq 'rebuild-cache' && shift @wanted_keys;
6754         return fill_project_list_info_uncached($projlist, @wanted_keys)
6755                 unless $projlist_cache_lifetime && $projlist_cache_lifetime > 0;
6756
6757         use File::stat;
6758
6759         my $cache_lifetime = $rebuild ? 0 : $projlist_cache_lifetime;
6760         my $cache_file = "$cache_dir/$projlist_cache_name";
6761
6762         my @projects;
6763         my $stale = 0;
6764         my $now = time();
6765         my $cache_mtime;
6766         if ($cache_lifetime && -f $cache_file) {
6767                 $cache_mtime = stat($cache_file)->mtime;
6768                 $cache_dump = undef if $cache_mtime &&
6769                         (!$cache_dump_mtime || $cache_dump_mtime != $cache_mtime);
6770         }
6771         if (defined $cache_mtime && # caching is on and $cache_file exists
6772             $cache_mtime + $cache_lifetime*60 > $now &&
6773             ($cache_dump || ($cache_dump = git_retrieve_cache_file($cache_file)))) {
6774                 # Cache hit.
6775                 $cache_dump_mtime = $cache_mtime;
6776                 $stale = $now - $cache_mtime;
6777                 my $verify = ($action eq 'summary' || $action eq 'forks') &&
6778                         gitweb_check_feature('forks');
6779                 @projects = git_filter_cached_projects($cache_dump, $projlist, $verify);
6780
6781         } else { # Cache miss.
6782                 if (defined $cache_mtime) {
6783                         # Postpone timeout by two minutes so that we get
6784                         # enough time to do our job, or to be more exact
6785                         # make cache expire after two minutes from now.
6786                         my $time = $now - $cache_lifetime*60 + 120;
6787                         utime $time, $time, $cache_file;
6788                 }
6789                 my @all_projects = git_get_projects_list();
6790                 my %all_projects_filled = map { ( $_->{'path'} => $_ ) }
6791                         fill_project_list_info_uncached(\@all_projects);
6792                 map { $all_projects_filled{$_->{'path'}} = $_ }
6793                         filter_forks_from_projects_list([values(%all_projects_filled)])
6794                         if gitweb_check_feature('forks');
6795                 $cache_dump = [[sort {$a->{'path'} cmp $b->{'path'}} values(%all_projects_filled)],
6796                                \%all_projects_filled];
6797                 $cache_dump_mtime = git_store_cache_file($cache_file, $cache_dump);
6798                 @projects = git_filter_cached_projects($cache_dump, $projlist);
6799         }
6800
6801         if ($cache_lifetime && $stale > 0) {
6802                 print "<div class=\"stale_info\">Cached version (${stale}s old)</div>\n"
6803                         unless $shown_stale_message;
6804                 $shown_stale_message = 1;
6805         }
6806
6807         return @projects;
6808 }
6809
6810 sub fill_project_list_info_uncached {
6811         my ($projlist, @wanted_keys) = @_;
6812         my @projects;
6813         my $filter_set = sub { return @_; };
6814         if (@wanted_keys) {
6815                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
6816                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
6817         }
6818
6819         my $show_ctags = gitweb_check_feature('ctags');
6820  PROJECT:
6821         foreach my $pr (@$projlist) {
6822                 if (project_info_needs_filling($pr, $filter_set->('age_epoch'))) {
6823                         my (@activity) = git_get_last_activity($pr->{'path'});
6824                         unless (@activity) {
6825                                 next PROJECT;
6826                         }
6827                         ($pr->{'age_epoch'}) = @activity;
6828                 }
6829                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
6830                         my $descr = git_get_project_description($pr->{'path'}) || "";
6831                         $descr = to_utf8($descr);
6832                         $pr->{'descr_long'} = $descr;
6833                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
6834                 }
6835                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
6836                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
6837                 }
6838                 if ($show_ctags &&
6839                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
6840                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
6841                 }
6842                 if ($projects_list_group_categories &&
6843                     project_info_needs_filling($pr, $filter_set->('category'))) {
6844                         my $cat = git_get_project_category($pr->{'path'}) ||
6845                                                            $project_list_default_category;
6846                         $pr->{'category'} = to_utf8($cat);
6847                 }
6848
6849                 push @projects, $pr;
6850         }
6851
6852         return @projects;
6853 }
6854
6855 sub sort_projects_list {
6856         my ($projlist, $order) = @_;
6857
6858         sub order_str {
6859                 my $key = shift;
6860                 return sub { lc($a->{$key}) cmp lc($b->{$key}) };
6861         }
6862
6863         sub order_reverse_num_then_undef {
6864                 my $key = shift;
6865                 return sub {
6866                         defined $a->{$key} ?
6867                                 (defined $b->{$key} ? $b->{$key} <=> $a->{$key} : -1) :
6868                                 (defined $b->{$key} ? 1 : 0)
6869                 };
6870         }
6871
6872         my %orderings = (
6873                 project => order_str('path'),
6874                 descr => order_str('descr_long'),
6875                 owner => order_str('owner'),
6876                 age => order_reverse_num_then_undef('age_epoch'),
6877         );
6878
6879         my $ordering = $orderings{$order};
6880         return defined $ordering ? sort $ordering @$projlist : @$projlist;
6881 }
6882
6883 # returns a hash of categories, containing the list of project
6884 # belonging to each category
6885 sub build_projlist_by_category {
6886         my ($projlist, $from, $to) = @_;
6887         my %categories;
6888
6889         $from = 0 unless defined $from;
6890         $to = $#$projlist if (!defined $to || $#$projlist < $to);
6891
6892         for (my $i = $from; $i <= $to; $i++) {
6893                 my $pr = $projlist->[$i];
6894                 push @{$categories{ $pr->{'category'} }}, $pr;
6895         }
6896
6897         return wantarray ? %categories : \%categories;
6898 }
6899
6900 # print 'sort by' <th> element, generating 'sort by $name' replay link
6901 # if that order is not selected
6902 sub print_sort_th {
6903         print format_sort_th(@_);
6904 }
6905
6906 sub format_sort_th {
6907         my ($name, $order, $header) = @_;
6908         my $sort_th = "";
6909         $header ||= ucfirst($name);
6910
6911         if ($order eq $name) {
6912                 $sort_th .= "<th>$header</th>\n";
6913         } else {
6914                 $sort_th .= "<th>" .
6915                             $cgi->a({-href => href(-replay=>1, order=>$name),
6916                                      -class => "header"}, $header) .
6917                             "</th>\n";
6918         }
6919
6920         return $sort_th;
6921 }
6922
6923 sub git_project_list_rows {
6924         my ($projlist, $from, $to, $check_forks) = @_;
6925
6926         $from = 0 unless defined $from;
6927         $to = $#$projlist if (!defined $to || $#$projlist < $to);
6928
6929         my $now = time;
6930         my $alternate = 1;
6931         for (my $i = $from; $i <= $to; $i++) {
6932                 my $pr = $projlist->[$i];
6933
6934                 if ($alternate) {
6935                         print "<tr class=\"dark\">\n";
6936                 } else {
6937                         print "<tr class=\"light\">\n";
6938                 }
6939                 $alternate ^= 1;
6940
6941                 if ($check_forks) {
6942                         print "<td>";
6943                         if ($pr->{'forks'}) {
6944                                 my $nforks = scalar @{$pr->{'forks'}};
6945                                 my $s = $nforks == 1 ? '' : 's';
6946                                 if ($nforks > 0) {
6947                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
6948                                                        -title => "$nforks fork$s"}, "+");
6949                                 } else {
6950                                         print $cgi->span({-title => "$nforks fork$s"}, "+");
6951                                 }
6952                         }
6953                         print "</td>\n";
6954                 }
6955                 my $path = $pr->{'path'};
6956                 my $dotgit = $path =~ s/\.git$// ? '.git' : '';
6957                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
6958                                         -class => "list"},
6959                                        esc_html_match_hl($path, $search_regexp).$dotgit) .
6960                       "</td>\n" .
6961                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
6962                                         -class => "list",
6963                                         -title => $pr->{'descr_long'}},
6964                                         $search_regexp
6965                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
6966                                                                     $pr->{'descr'}, $search_regexp)
6967                                         : esc_html($pr->{'descr'})) .
6968                       "</td>\n";
6969                 unless ($omit_owner) {
6970                         print "<td><i>" . ($owner_link_hook
6971                                           ? $cgi->a({-href => $owner_link_hook->($pr->{'owner'}), -class => "list"},
6972                                                     chop_and_escape_str($pr->{'owner'}, 15))
6973                                           : chop_and_escape_str($pr->{'owner'}, 15)) . "</i></td>\n";
6974                 }
6975                 unless ($omit_age_column) {
6976                         my ($age_epoch, $age_string) = ($pr->{'age_epoch'});
6977                         $age_string = defined $age_epoch ? age_string($age_epoch, $now) : "No commits";
6978                         print "<td class=\"". age_class($age_epoch, $now) . "\">" . $age_string . "</td>\n";
6979                 }
6980                 print"<td class=\"link\">" .
6981                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
6982                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "log") . " | " .
6983                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
6984                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
6985                       "</td>\n" .
6986                       "</tr>\n";
6987         }
6988 }
6989
6990 sub git_project_list_body {
6991         # actually uses global variable $project
6992         my ($projlist, $order, $from, $to, $extra, $no_header, $ctags_action, $keep_top) = @_;
6993         my @projects = @$projlist;
6994
6995         my $check_forks = gitweb_check_feature('forks');
6996         my $show_ctags  = gitweb_check_feature('ctags');
6997         my $tagfilter = $show_ctags ? $input_params{'ctag_filter'} : undef;
6998         $check_forks = undef
6999                 if ($tagfilter || $search_regexp);
7000
7001         # filtering out forks before filling info allows us to do less work
7002         if ($check_forks) {
7003                 @projects = filter_forks_from_projects_list(\@projects);
7004                 push @projects, { 'path' => "$project_filter.git" }
7005                         if $project_filter && $keep_top && is_valid_project("$project_filter.git");
7006         }
7007         # search_projects_list pre-fills required info
7008         @projects = search_projects_list(\@projects,
7009                                          'search_regexp' => $search_regexp,
7010                                          'tagfilter'  => $tagfilter)
7011                 if ($tagfilter || $search_regexp);
7012         # fill the rest
7013         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
7014         push @all_fields, 'age_epoch' unless($omit_age_column);
7015         push @all_fields, 'owner' unless($omit_owner);
7016         @projects = fill_project_list_info(\@projects, @all_fields);
7017
7018         $order ||= $default_projects_order;
7019         $from = 0 unless defined $from;
7020         $to = $#projects if (!defined $to || $#projects < $to);
7021
7022         # short circuit
7023         if ($from > $to) {
7024                 print "<center>\n".
7025                       "<b>No such projects found</b><br />\n".
7026                       "Click ".$cgi->a({-href=>href(project=>undef,action=>'project_list')},"here")." to view all projects<br />\n".
7027                       "</center>\n<br />\n";
7028                 return;
7029         }
7030
7031         @projects = sort_projects_list(\@projects, $order);
7032
7033         if ($show_ctags) {
7034                 my $ctags = git_gather_all_ctags(\@projects);
7035                 my $cloud = git_populate_project_tagcloud($ctags, $ctags_action||'project_list');
7036                 print git_show_project_tagcloud($cloud, 64);
7037         }
7038
7039         print "<table class=\"project_list\">\n";
7040         unless ($no_header) {
7041                 print "<tr>\n";
7042                 if ($check_forks) {
7043                         print "<th></th>\n";
7044                 }
7045                 print_sort_th('project', $order, 'Project');
7046                 print_sort_th('descr', $order, 'Description');
7047                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
7048                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
7049                 print "<th></th>\n" . # for links
7050                       "</tr>\n";
7051         }
7052
7053         if ($projects_list_group_categories) {
7054                 # only display categories with projects in the $from-$to window
7055                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
7056                 my %categories = build_projlist_by_category(\@projects, $from, $to);
7057                 foreach my $cat (sort keys %categories) {
7058                         unless ($cat eq "") {
7059                                 print "<tr>\n";
7060                                 if ($check_forks) {
7061                                         print "<td></td>\n";
7062                                 }
7063                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
7064                                 print "</tr>\n";
7065                         }
7066
7067                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
7068                 }
7069         } else {
7070                 git_project_list_rows(\@projects, $from, $to, $check_forks);
7071         }
7072
7073         if (defined $extra) {
7074                 print "<tr>\n";
7075                 if ($check_forks) {
7076                         print "<td></td>\n";
7077                 }
7078                 print "<td colspan=\"5\">$extra</td>\n" .
7079                       "</tr>\n";
7080         }
7081         print "</table>\n";
7082 }
7083
7084 sub git_log_body {
7085         # uses global variable $project
7086         my ($commitlist, $from, $to, $refs, $extra) = @_;
7087
7088         $from = 0 unless defined $from;
7089         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
7090
7091         for (my $i = 0; $i <= $to; $i++) {
7092                 my %co = %{$commitlist->[$i]};
7093                 next if !%co;
7094                 my $commit = $co{'id'};
7095                 my $ref = format_ref_marker($refs, $commit);
7096                 git_print_header_div('commit',
7097                                "<span class=\"age\">$co{'age_string'}</span>" .
7098                                esc_html($co{'title'}),
7099                                $commit, undef, $ref);
7100                 print "<div class=\"title_text\">\n" .
7101                       "<div class=\"log_link\">\n" .
7102                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
7103                       " | " .
7104                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
7105                       " | " .
7106                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
7107                       "<br/>\n" .
7108                       "</div>\n";
7109                       git_print_authorship(\%co, -tag => 'span');
7110                       print "<br/>\n</div>\n";
7111
7112                 print "<div class=\"log_body\">\n";
7113                 git_print_log($co{'comment'}, -final_empty_line=> 1);
7114                 print "</div>\n";
7115         }
7116         if ($extra) {
7117                 print "<div class=\"page_nav\">\n";
7118                 print "$extra\n";
7119                 print "</div>\n";
7120         }
7121 }
7122
7123 sub git_shortlog_body {
7124         # uses global variable $project
7125         my ($commitlist, $from, $to, $refs, $extra) = @_;
7126
7127         $from = 0 unless defined $from;
7128         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
7129
7130         print "<table class=\"shortlog\">\n";
7131         my $alternate = 1;
7132         for (my $i = $from; $i <= $to; $i++) {
7133                 my %co = %{$commitlist->[$i]};
7134                 my $commit = $co{'id'};
7135                 my $ref = format_ref_marker($refs, $commit);
7136                 if ($alternate) {
7137                         print "<tr class=\"dark\">\n";
7138                 } else {
7139                         print "<tr class=\"light\">\n";
7140                 }
7141                 $alternate ^= 1;
7142                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
7143                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7144                       format_author_html('td', \%co, 10) . "<td>";
7145                 print format_subject_html($co{'title'}, $co{'title_short'},
7146                                           href(action=>"commit", hash=>$commit), $ref);
7147                 print "</td>\n" .
7148                       "<td class=\"link\">" .
7149                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
7150                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
7151                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
7152                 my $snapshot_links = format_snapshot_links($commit);
7153                 if (defined $snapshot_links) {
7154                         print " | " . $snapshot_links;
7155                 }
7156                 print "</td>\n" .
7157                       "</tr>\n";
7158         }
7159         if (defined $extra) {
7160                 print "<tr>\n" .
7161                       "<td colspan=\"4\">$extra</td>\n" .
7162                       "</tr>\n";
7163         }
7164         print "</table>\n";
7165 }
7166
7167 sub git_history_body {
7168         # Warning: assumes constant type (blob or tree) during history
7169         my ($commitlist, $from, $to, $refs, $extra,
7170             $file_name, $file_hash, $ftype) = @_;
7171
7172         $from = 0 unless defined $from;
7173         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
7174
7175         print "<table class=\"history\">\n";
7176         my $alternate = 1;
7177         for (my $i = $from; $i <= $to; $i++) {
7178                 my %co = %{$commitlist->[$i]};
7179                 if (!%co) {
7180                         next;
7181                 }
7182                 my $commit = $co{'id'};
7183
7184                 my $ref = format_ref_marker($refs, $commit);
7185
7186                 if ($alternate) {
7187                         print "<tr class=\"dark\">\n";
7188                 } else {
7189                         print "<tr class=\"light\">\n";
7190                 }
7191                 $alternate ^= 1;
7192                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7193         # shortlog:   format_author_html('td', \%co, 10)
7194                       format_author_html('td', \%co, 15, 3) . "<td>";
7195                 # originally git_history used chop_str($co{'title'}, 50)
7196                 print format_subject_html($co{'title'}, $co{'title_short'},
7197                                           href(action=>"commit", hash=>$commit), $ref);
7198                 print "</td>\n" .
7199                       "<td class=\"link\">" .
7200                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
7201                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
7202
7203                 if ($ftype eq 'blob') {
7204                         my $blob_current = $file_hash;
7205                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
7206                         if (defined $blob_current && defined $blob_parent &&
7207                                         $blob_current ne $blob_parent) {
7208                                 print " | " .
7209                                         $cgi->a({-href => href(action=>"blobdiff",
7210                                                                hash=>$blob_current, hash_parent=>$blob_parent,
7211                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
7212                                                                file_name=>$file_name)},
7213                                                 "diff to current");
7214                         }
7215                 }
7216                 print "</td>\n" .
7217                       "</tr>\n";
7218         }
7219         if (defined $extra) {
7220                 print "<tr>\n" .
7221                       "<td colspan=\"4\">$extra</td>\n" .
7222                       "</tr>\n";
7223         }
7224         print "</table>\n";
7225 }
7226
7227 sub git_tags_body {
7228         # uses global variable $project
7229         my ($taglist, $from, $to, $extra, $head_at, $full, $order) = @_;
7230         $from = 0 unless defined $from;
7231         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
7232         $order ||= $default_refs_order;
7233
7234         print "<table class=\"tags\">\n";
7235         if ($full) {
7236                 print "<tr class=\"tags_header\">\n";
7237                 print_sort_th('age', $order, 'Last Change');
7238                 print_sort_th('name', $order, 'Name');
7239                 print "<th></th>\n" . # for comment
7240                       "<th></th>\n" . # for tag
7241                       "<th></th>\n" . # for links
7242                       "</tr>\n";
7243         }
7244         my $alternate = 1;
7245         for (my $i = $from; $i <= $to; $i++) {
7246                 my $entry = $taglist->[$i];
7247                 my %tag = %$entry;
7248                 my $comment = $tag{'subject'};
7249                 my $comment_short;
7250                 if (defined $comment) {
7251                         $comment_short = chop_str($comment, 30, 5);
7252                 }
7253                 my $curr = defined $head_at && $tag{'id'} eq $head_at;
7254                 if ($alternate) {
7255                         print "<tr class=\"dark\">\n";
7256                 } else {
7257                         print "<tr class=\"light\">\n";
7258                 }
7259                 $alternate ^= 1;
7260                 if (defined $tag{'age'}) {
7261                         print "<td><i>$tag{'age'}</i></td>\n";
7262                 } else {
7263                         print "<td></td>\n";
7264                 }
7265                 print(($curr ? "<td class=\"current_head\">" : "<td>") .
7266                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
7267                                -class => "list name"}, esc_html($tag{'name'})) .
7268                       "</td>\n" .
7269                       "<td>");
7270                 if (defined $comment) {
7271                         print format_subject_html($comment, $comment_short,
7272                                                   href(action=>"tag", hash=>$tag{'id'}));
7273                 }
7274                 print "</td>\n" .
7275                       "<td class=\"selflink\">";
7276                 if ($tag{'type'} eq "tag") {
7277                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
7278                 } else {
7279                         print "&#160;";
7280                 }
7281                 print "</td>\n" .
7282                       "<td class=\"link\">" . " | " .
7283                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
7284                 if ($tag{'reftype'} eq "commit") {
7285                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "log");
7286                         print " | " . $cgi->a({-href => href(action=>"tree", hash=>$tag{'fullname'})}, "tree") if $full;
7287                 } elsif ($tag{'reftype'} eq "blob") {
7288                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
7289                 }
7290                 print "</td>\n" .
7291                       "</tr>";
7292         }
7293         if (defined $extra) {
7294                 print "<tr>\n" .
7295                       "<td colspan=\"5\">$extra</td>\n" .
7296                       "</tr>\n";
7297         }
7298         print "</table>\n";
7299 }
7300
7301 sub git_heads_body {
7302         # uses global variable $project
7303         my ($headlist, $head_at, $from, $to, $extra) = @_;
7304         $from = 0 unless defined $from;
7305         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
7306
7307         print "<table class=\"heads\">\n";
7308         my $alternate = 1;
7309         for (my $i = $from; $i <= $to; $i++) {
7310                 my $entry = $headlist->[$i];
7311                 my %ref = %$entry;
7312                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
7313                 if ($alternate) {
7314                         print "<tr class=\"dark\">\n";
7315                 } else {
7316                         print "<tr class=\"light\">\n";
7317                 }
7318                 $alternate ^= 1;
7319                 print "<td><i>$ref{'age'}</i></td>\n" .
7320                       ($curr ? "<td class=\"current_head\">" : "<td>") .
7321                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
7322                                -class => "list name"},esc_html($ref{'name'})) .
7323                       "</td>\n" .
7324                       "<td class=\"link\">" .
7325                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "log") . " | " .
7326                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
7327                       "</td>\n" .
7328                       "</tr>";
7329         }
7330         if (defined $extra) {
7331                 print "<tr>\n" .
7332                       "<td colspan=\"3\">$extra</td>\n" .
7333                       "</tr>\n";
7334         }
7335         print "</table>\n";
7336 }
7337
7338 # Display a single remote block
7339 sub git_remote_block {
7340         my ($remote, $rdata, $limit, $head) = @_;
7341
7342         my $heads = $rdata->{'heads'};
7343         my $fetch = $rdata->{'fetch'};
7344         my $push = $rdata->{'push'};
7345
7346         my $urls_table = "<table class=\"projects_list\">\n" ;
7347
7348         if (defined $fetch) {
7349                 if ($fetch eq $push) {
7350                         $urls_table .= format_repo_url("URL", $fetch);
7351                 } else {
7352                         $urls_table .= format_repo_url("Fetch&#160;URL", $fetch);
7353                         $urls_table .= format_repo_url("Push&#160;URL", $push) if defined $push;
7354                 }
7355         } elsif (defined $push) {
7356                 $urls_table .= format_repo_url("Push&#160;URL", $push);
7357         } else {
7358                 $urls_table .= format_repo_url("", "No remote URL");
7359         }
7360
7361         $urls_table .= "</table>\n";
7362
7363         my $dots;
7364         if (defined $limit && $limit < @$heads) {
7365                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
7366         }
7367
7368         print $urls_table;
7369         git_heads_body($heads, $head, 0, $limit, $dots);
7370 }
7371
7372 # Display a list of remote names with the respective fetch and push URLs
7373 sub git_remotes_list {
7374         my ($remotedata, $limit) = @_;
7375         print "<table class=\"heads\">\n";
7376         my $alternate = 1;
7377         my @remotes = sort keys %$remotedata;
7378
7379         my $limited = $limit && $limit < @remotes;
7380
7381         $#remotes = $limit - 1 if $limited;
7382
7383         while (my $remote = shift @remotes) {
7384                 my $rdata = $remotedata->{$remote};
7385                 my $fetch = $rdata->{'fetch'};
7386                 my $push = $rdata->{'push'};
7387                 if ($alternate) {
7388                         print "<tr class=\"dark\">\n";
7389                 } else {
7390                         print "<tr class=\"light\">\n";
7391                 }
7392                 $alternate ^= 1;
7393                 print "<td>" .
7394                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
7395                                -class=> "list name"},esc_html($remote)) .
7396                       "</td>";
7397                 print "<td class=\"link\">" .
7398                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
7399                       " | " .
7400                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
7401                       "</td>";
7402
7403                 print "</tr>\n";
7404         }
7405
7406         if ($limited) {
7407                 print "<tr>\n" .
7408                       "<td colspan=\"3\">" .
7409                       $cgi->a({-href => href(action=>"remotes")}, "...") .
7410                       "</td>\n" . "</tr>\n";
7411         }
7412
7413         print "</table>";
7414 }
7415
7416 # Display remote heads grouped by remote, unless there are too many
7417 # remotes, in which case we only display the remote names
7418 sub git_remotes_body {
7419         my ($remotedata, $limit, $head) = @_;
7420         if ($limit and $limit < keys %$remotedata) {
7421                 git_remotes_list($remotedata, $limit);
7422         } else {
7423                 fill_remote_heads($remotedata);
7424                 while (my ($remote, $rdata) = each %$remotedata) {
7425                         git_print_section({-class=>"remote", -id=>$remote},
7426                                 ["remotes", $remote, $remote], sub {
7427                                         git_remote_block($remote, $rdata, $limit, $head);
7428                                 });
7429                 }
7430         }
7431 }
7432
7433 sub git_search_message {
7434         my %co = @_;
7435
7436         my $greptype;
7437         if ($searchtype eq 'commit') {
7438                 $greptype = "--grep=";
7439         } elsif ($searchtype eq 'author') {
7440                 $greptype = "--author=";
7441         } elsif ($searchtype eq 'committer') {
7442                 $greptype = "--committer=";
7443         }
7444         $greptype .= $searchtext;
7445         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7446                                        $greptype, '--regexp-ignore-case',
7447                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7448
7449         my $paging_nav = '';
7450         if ($page > 0) {
7451                 $paging_nav .=
7452                         $cgi->a({-href => href(-replay=>1, page=>undef)},
7453                                 "first") .
7454                         " &#183; " .
7455                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
7456                                  -accesskey => "p", -title => "Alt-p"}, "prev");
7457         } else {
7458                 $paging_nav .= "first &#183; prev";
7459         }
7460         my $next_link = '';
7461         if ($#commitlist >= 100) {
7462                 $next_link =
7463                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7464                                  -accesskey => "n", -title => "Alt-n"}, "next");
7465                 $paging_nav .= " &#183; $next_link";
7466         } else {
7467                 $paging_nav .= " &#183; next";
7468         }
7469
7470         git_header_html();
7471
7472         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7473         git_print_header_div('commit', esc_html($co{'title'}), $hash);
7474         if ($page == 0 && !@commitlist) {
7475                 print "<p>No match.</p>\n";
7476         } else {
7477                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
7478         }
7479
7480         git_footer_html();
7481 }
7482
7483 sub git_search_changes {
7484         my %co = @_;
7485
7486         local $/ = "\n";
7487         defined(my $fd = git_cmd_pipe '--no-pager', 'log', @diff_opts,
7488                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7489                 ($search_use_regexp ? '--pickaxe-regex' : ()))
7490                         or die_error(500, "Open git-log failed");
7491
7492         git_header_html();
7493
7494         git_print_page_nav('','', $hash,$co{'tree'},$hash);
7495         git_print_header_div('commit', esc_html($co{'title'}), $hash);
7496
7497         print "<table class=\"pickaxe search\">\n";
7498         my $alternate = 1;
7499         undef %co;
7500         my @files;
7501         while (my $line = to_utf8(scalar <$fd>)) {
7502                 chomp $line;
7503                 next unless $line;
7504
7505                 my %set = parse_difftree_raw_line($line);
7506                 if (defined $set{'commit'}) {
7507                         # finish previous commit
7508                         if (%co) {
7509                                 print "</td>\n" .
7510                                       "<td class=\"link\">" .
7511                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
7512                                               "commit") .
7513                                       " | " .
7514                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
7515                                                              hash_base=>$co{'id'})},
7516                                               "tree") .
7517                                       "</td>\n" .
7518                                       "</tr>\n";
7519                         }
7520
7521                         if ($alternate) {
7522                                 print "<tr class=\"dark\">\n";
7523                         } else {
7524                                 print "<tr class=\"light\">\n";
7525                         }
7526                         $alternate ^= 1;
7527                         %co = parse_commit($set{'commit'});
7528                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7529                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7530                               "<td><i>$author</i></td>\n" .
7531                               "<td>" .
7532                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7533                                       -class => "list subject"},
7534                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
7535                 } elsif (defined $set{'to_id'}) {
7536                         next if ($set{'to_id'} =~ m/^0{40}$/);
7537
7538                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7539                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7540                                       -class => "list"},
7541                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7542                               "<br/>\n";
7543                 }
7544         }
7545         close $fd;
7546
7547         # finish last commit (warning: repetition!)
7548         if (%co) {
7549                 print "</td>\n" .
7550                       "<td class=\"link\">" .
7551                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
7552                               "commit") .
7553                       " | " .
7554                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
7555                                              hash_base=>$co{'id'})},
7556                               "tree") .
7557                       "</td>\n" .
7558                       "</tr>\n";
7559         }
7560
7561         print "</table>\n";
7562
7563         git_footer_html();
7564 }
7565
7566 sub git_search_files {
7567         my %co = @_;
7568
7569         local $/ = "\n";
7570         defined(my $fd = git_cmd_pipe 'grep', '-n', '-z',
7571                 $search_use_regexp ? ('-E', '-i') : '-F',
7572                 $searchtext, $co{'tree'})
7573                         or die_error(500, "Open git-grep failed");
7574
7575         git_header_html();
7576
7577         git_print_page_nav('','', $hash,$co{'tree'},$hash);
7578         git_print_header_div('commit', esc_html($co{'title'}), $hash);
7579
7580         print "<table class=\"grep_search\">\n";
7581         my $alternate = 1;
7582         my $matches = 0;
7583         my $lastfile = '';
7584         my $file_href;
7585         while (my $line = to_utf8(scalar <$fd>)) {
7586                 chomp $line;
7587                 my ($file, $lno, $ltext, $binary);
7588                 last if ($matches++ > 1000);
7589                 if ($line =~ /^Binary file (.+) matches$/) {
7590                         $file = $1;
7591                         $binary = 1;
7592                 } else {
7593                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
7594                         $file =~ s/^$co{'tree'}://;
7595                 }
7596                 if ($file ne $lastfile) {
7597                         $lastfile and print "</td></tr>\n";
7598                         if ($alternate++) {
7599                                 print "<tr class=\"dark\">\n";
7600                         } else {
7601                                 print "<tr class=\"light\">\n";
7602                         }
7603                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
7604                                           file_name=>$file);
7605                         print "<td class=\"list\">".
7606                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
7607                         print "</td><td>\n";
7608                         $lastfile = $file;
7609                 }
7610                 if ($binary) {
7611                         print "<div class=\"binary\">Binary file</div>\n";
7612                 } else {
7613                         $ltext = untabify($ltext);
7614                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7615                                 $ltext = esc_html($1, -nbsp=>1);
7616                                 $ltext .= '<span class="match">';
7617                                 $ltext .= esc_html($2, -nbsp=>1);
7618                                 $ltext .= '</span>';
7619                                 $ltext .= esc_html($3, -nbsp=>1);
7620                         } else {
7621                                 $ltext = esc_html($ltext, -nbsp=>1);
7622                         }
7623                         print "<div class=\"pre\">" .
7624                                 $cgi->a({-href => $file_href.'#l'.$lno,
7625                                         -class => "linenr"}, sprintf('%4i ', $lno)) .
7626                                 $ltext . "</div>\n";
7627                 }
7628         }
7629         if ($lastfile) {
7630                 print "</td></tr>\n";
7631                 if ($matches > 1000) {
7632                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7633                 }
7634         } else {
7635                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
7636         }
7637         close $fd;
7638
7639         print "</table>\n";
7640
7641         git_footer_html();
7642 }
7643
7644 sub git_search_grep_body {
7645         my ($commitlist, $from, $to, $extra) = @_;
7646         $from = 0 unless defined $from;
7647         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
7648
7649         print "<table class=\"commit_search\">\n";
7650         my $alternate = 1;
7651         for (my $i = $from; $i <= $to; $i++) {
7652                 my %co = %{$commitlist->[$i]};
7653                 if (!%co) {
7654                         next;
7655                 }
7656                 my $commit = $co{'id'};
7657                 if ($alternate) {
7658                         print "<tr class=\"dark\">\n";
7659                 } else {
7660                         print "<tr class=\"light\">\n";
7661                 }
7662                 $alternate ^= 1;
7663                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7664                       format_author_html('td', \%co, 15, 5) .
7665                       "<td>" .
7666                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7667                                -class => "list subject"},
7668                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7669                 my $comment = $co{'comment'};
7670                 foreach my $line (@$comment) {
7671                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
7672                                 my ($lead, $match, $trail) = ($1, $2, $3);
7673                                 $match = chop_str($match, 70, 5, 'center');
7674                                 my $contextlen = int((80 - length($match))/2);
7675                                 $contextlen = 30 if ($contextlen > 30);
7676                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
7677                                 $trail = chop_str($trail, $contextlen, 10, 'right');
7678
7679                                 $lead  = esc_html($lead);
7680                                 $match = esc_html($match);
7681                                 $trail = esc_html($trail);
7682
7683                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
7684                         }
7685                 }
7686                 print "</td>\n" .
7687                       "<td class=\"link\">" .
7688                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7689                       " | " .
7690                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
7691                       " | " .
7692                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7693                 print "</td>\n" .
7694                       "</tr>\n";
7695         }
7696         if (defined $extra) {
7697                 print "<tr>\n" .
7698                       "<td colspan=\"3\">$extra</td>\n" .
7699                       "</tr>\n";
7700         }
7701         print "</table>\n";
7702 }
7703
7704 ## ======================================================================
7705 ## ======================================================================
7706 ## actions
7707
7708 sub git_project_list_load {
7709         my $empty_list_ok = shift;
7710         my $order = $input_params{'order'};
7711         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
7712                 die_error(400, "Unknown order parameter");
7713         }
7714
7715         my @list = git_get_projects_list($project_filter, $strict_export);
7716         if ($project_filter && (!@list || !gitweb_check_feature('forks'))) {
7717                 push @list, { 'path' => "$project_filter.git" }
7718                         if is_valid_project("$project_filter.git");
7719         }
7720         if (!@list) {
7721                 die_error(404, "No projects found") unless $empty_list_ok;
7722         }
7723
7724         return (\@list, $order);
7725 }
7726
7727 sub git_frontpage {
7728         my ($projlist, $order);
7729
7730         if ($frontpage_no_project_list) {
7731                 $project = undef;
7732                 $project_filter = undef;
7733         } else {
7734                 ($projlist, $order) = git_project_list_load(1);
7735         }
7736         git_header_html();
7737         if (defined $home_text && -f $home_text) {
7738                 print "<div class=\"index_include\">\n";
7739                 insert_file($home_text);
7740                 print "</div>\n";
7741         }
7742         git_project_search_form($searchtext, $search_use_regexp);
7743         if ($frontpage_no_project_list) {
7744                 my $show_ctags = gitweb_check_feature('ctags');
7745                 if ($frontpage_no_project_list == 1 and $show_ctags) {
7746                         my @projects = git_get_projects_list($project_filter, $strict_export);
7747                         @projects = filter_forks_from_projects_list(\@projects) if gitweb_check_feature('forks');
7748                         @projects = fill_project_list_info(\@projects, 'ctags');
7749                         my $ctags = git_gather_all_ctags(\@projects);
7750                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
7751                         print git_show_project_tagcloud($cloud, 64);
7752                 }
7753         } else {
7754                 git_project_list_body($projlist, $order, undef, undef, undef, undef, undef, 1);
7755         }
7756         git_footer_html();
7757 }
7758
7759 sub git_project_list {
7760         my ($projlist, $order) = git_project_list_load();
7761         git_header_html();
7762         if (!$frontpage_no_project_list && defined $home_text && -f $home_text) {
7763                 print "<div class=\"index_include\">\n";
7764                 insert_file($home_text);
7765                 print "</div>\n";
7766         }
7767         git_project_search_form();
7768         git_project_list_body($projlist, $order, undef, undef, undef, undef, undef, 1);
7769         git_footer_html();
7770 }
7771
7772 sub git_forks {
7773         my $order = $input_params{'order'};
7774         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
7775                 die_error(400, "Unknown order parameter");
7776         }
7777
7778         my $filter = $project;
7779         $filter =~ s/\.git$//;
7780         my @list = git_get_projects_list($filter);
7781         if (!@list) {
7782                 die_error(404, "No forks found");
7783         }
7784
7785         git_header_html();
7786         git_print_page_nav('','');
7787         git_print_header_div('summary', "$project forks");
7788         git_project_list_body(\@list, $order, undef, undef, undef, undef, 'forks');
7789         git_footer_html();
7790 }
7791
7792 sub git_project_index {
7793         my @projects = git_get_projects_list($project_filter, $strict_export);
7794         if (!@projects) {
7795                 die_error(404, "No projects found");
7796         }
7797
7798         print $cgi->header(
7799                 -type => 'text/plain',
7800                 -charset => 'utf-8',
7801                 -content_disposition => 'inline; filename="index.aux"');
7802
7803         foreach my $pr (@projects) {
7804                 if (!exists $pr->{'owner'}) {
7805                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
7806                 }
7807
7808                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
7809                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
7810                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
7811                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
7812                 $path  =~ s/ /\+/g;
7813                 $owner =~ s/ /\+/g;
7814
7815                 print "$path $owner\n";
7816         }
7817 }
7818
7819 sub git_summary {
7820         my $descr = git_get_project_description($project) || "none";
7821         my %co = parse_commit("HEAD");
7822         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
7823         my $head = $co{'id'};
7824         my $remote_heads = gitweb_check_feature('remote_heads');
7825
7826         my $owner = git_get_project_owner($project);
7827         my $homepage = git_get_project_config('homepage');
7828         my $base_url = git_get_project_config('baseurl');
7829
7830         my $refs = git_get_references();
7831         # These get_*_list functions return one more to allow us to see if
7832         # there are more ...
7833         my @taglist  = git_get_tags_list(16);
7834         my @headlist = git_get_heads_list(16);
7835         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
7836         my @forklist;
7837         my $check_forks = gitweb_check_feature('forks');
7838
7839         if ($check_forks) {
7840                 # find forks of a project
7841                 my $filter = $project;
7842                 $filter =~ s/\.git$//;
7843                 @forklist = git_get_projects_list($filter);
7844                 # filter out forks of forks
7845                 @forklist = filter_forks_from_projects_list(\@forklist)
7846                         if (@forklist);
7847         }
7848
7849         git_header_html();
7850         git_print_page_nav('summary','', $head);
7851
7852         if ($check_forks and $project =~ m#/#) {
7853                 my $xproject = $project; $xproject =~ s#/[^/]+$#.git#; #
7854                 if (is_valid_project($xproject)) {
7855                         my $r = $cgi->a({-href=> href(project => $xproject, action => 'summary')}, $xproject);
7856                         print <<EOT;
7857 <div class="forkinfo">
7858 This project is a fork of the $r project. If you have that one
7859 already cloned locally, you can use
7860 <pre>git clone --reference /path/to/your/$xproject/incarnation mirror_URL</pre>
7861 to save bandwidth during cloning.
7862 </div>
7863 EOT
7864                 }
7865         }
7866
7867         print "<div class=\"title\">&#160;</div>\n";
7868         print "<table class=\"projects_list\">\n" .
7869               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
7870         if ($homepage) {
7871                 print "<tr id=\"metadata_homepage\"><td>homepage&#160;URL</td><td>" . $cgi->a({-href => $homepage}, $homepage) . "</td></tr>\n";
7872         }
7873         if ($base_url) {
7874                 print "<tr id=\"metadata_baseurl\"><td>repository&#160;URL</td><td>" . esc_html($base_url) . "</td></tr>\n";
7875         }
7876         if ($owner and not $omit_owner) {
7877                 print "<tr id=\"metadata_owner\"><td>owner</td><td>" . ($owner_link_hook
7878                         ? $cgi->a({-href => $owner_link_hook->($owner)}, email_obfuscate($owner))
7879                         : email_obfuscate($owner)) . "</td></tr>\n";
7880         }
7881         if (defined $cd{'rfc2822'}) {
7882                 print "<tr id=\"metadata_lchange\"><td>last&#160;change</td>" .
7883                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
7884         }
7885         print format_lastrefresh_row(), "\n";
7886
7887         # use per project git URL list in $projectroot/$project/cloneurl
7888         # or make project git URL from git base URL and project name
7889         my $url_tag = $base_url ? "mirror&#160;URL" : "URL";
7890         my $url_class = "metadata_url";
7891         my @url_list = git_get_project_url_list($project);
7892         unless (@url_list) {
7893                 @url_list = @git_base_url_list;
7894                 if ((git_get_project_config("showpush", '--bool')||'false') eq "true" ||
7895                     -f "$projectroot/$project/.nofetch") {
7896                         my $pushidx = @url_list;
7897                         foreach (@git_base_push_urls) {
7898                                 if ($https_hint_html && !ref($_) && $_ =~ /^https:/i) {
7899                                         push(@url_list, [$_, $https_hint_html]);
7900                                 } else {
7901                                         push(@url_list, $_);
7902                                 }
7903                         }
7904                         if ($#url_list >= $pushidx) {
7905                                 my $pushtag = "push&#160;URL";
7906                                 my $classtag = "metadata_pushurl";
7907                                 if (ref($url_list[$pushidx])) {
7908                                         $url_list[$pushidx] = [
7909                                                 ${$url_list[$pushidx]}[0],
7910                                                 ${$url_list[$pushidx]}[1],
7911                                                 $pushtag,
7912                                                 $classtag];
7913                                 } else {
7914                                         $url_list[$pushidx] = [
7915                                                 $url_list[$pushidx],
7916                                                 undef,
7917                                                 $pushtag,
7918                                                 $classtag];
7919                                 }
7920                         }
7921                 } else {
7922                         push(@url_list, @git_base_mirror_urls);
7923                 }
7924                 for (my $i=0; $i<=$#url_list; ++$i) {
7925                         if (ref($url_list[$i])) {
7926                                 $url_list[$i] = [
7927                                         ${$url_list[$i]}[0] . "/$project",
7928                                         ${$url_list[$i]}[1],
7929                                         ${$url_list[$i]}[2],
7930                                         ${$url_list[$i]}[3]];
7931                         } else {
7932                                 $url_list[$i] .= "/$project";
7933                         }
7934                 }
7935         }
7936         foreach (@url_list) {
7937                 next unless $_;
7938                 my $git_url;
7939                 my $html_hint = "";
7940                 my $next_tag = undef;
7941                 my $next_class = undef;
7942                 if (ref($_)) {
7943                         $git_url = $$_[0];
7944                         $html_hint = "&#160;" . $$_[1] if defined($$_[1]);
7945                         $next_tag = $$_[2];
7946                         $next_class = $$_[3];
7947                 } else {
7948                         $git_url = $_;
7949                 }
7950                 next unless $git_url;
7951                 $url_class = $next_class if $next_class;
7952                 $url_tag = $next_tag if $next_tag;
7953                 print "<tr class=\"$url_class\"><td>$url_tag</td><td>$git_url$html_hint</td></tr>\n";
7954                 $url_tag = "";
7955         }
7956
7957         if (defined($git_base_bundles_url) && -d "$projectroot/$project/bundles") {
7958                 my $projname = $project;
7959                 $projname =~ s|^.*/||;
7960                 my $url = "$git_base_bundles_url/$project/bundles";
7961                 print format_repo_url(
7962                         "bundle&#160;info",
7963                         "<a rel='nofollow' href='$url'>$projname downloadable bundles</a>");
7964         }
7965
7966         # Tag cloud
7967         my $show_ctags = gitweb_check_feature('ctags');
7968         if ($show_ctags) {
7969                 my $ctags = git_get_project_ctags($project);
7970                 if (%$ctags || $show_ctags !~ /^\d+$/) {
7971                         # without ability to add tags, don't show if there are none
7972                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
7973                         print "<tr id=\"metadata_ctags\">" .
7974                               "<td style=\"vertical-align:middle\">content&#160;tags<br />";
7975                         print "</td>\n<td>" unless %$ctags;
7976                         print "<form action=\"$show_ctags\" method=\"post\" style=\"white-space:nowrap\">" .
7977                               "<input type=\"hidden\" name=\"p\" value=\"$project\"/>" .
7978                               "add: <input type=\"text\" name=\"t\" size=\"8\" /></form>"
7979                               unless $show_ctags =~ /^\d+$/;
7980                         print "</td>\n<td>" if %$ctags;
7981                         print git_show_project_tagcloud($cloud, 48)."</td>" .
7982                               "</tr>\n";
7983                 }
7984         }
7985
7986         print "</table>\n";
7987
7988         # If XSS prevention is on, we don't include README.html.
7989         # TODO: Allow a readme in some safe format.
7990         if (!$prevent_xss) {
7991                 my $readme_name = "readme";
7992                 my $readme;
7993                 if (-s "$projectroot/$project/README.html") {
7994                         $readme = collect_html_file("$projectroot/$project/README.html");
7995                 } else {
7996                         $readme = collect_output($git_automatic_readme_html, "$projectroot/$project");
7997                         if ($readme && $readme =~ /^<!-- README NAME: ((?:[^-]|(?:-(?!-)))+) -->/) {
7998                                 $readme_name = $1;
7999                                 $readme =~ s/^<!--(?:[^-]|(?:-(?!-)))*-->\n?//;
8000                         }
8001                 }
8002                 if (defined($readme)) {
8003                         $readme =~ s/^\s+//s;
8004                         $readme =~ s/\s+$//s;
8005                         print "<div class=\"title\">$readme_name</div>\n",
8006                               "<div class=\"readme\">\n",
8007                               $readme,
8008                               "\n</div>\n"
8009                         if $readme ne '';
8010                 }
8011         }
8012
8013         # we need to request one more than 16 (0..15) to check if
8014         # those 16 are all
8015         my @commitlist = $head ? parse_commits($head, 17) : ();
8016         if (@commitlist) {
8017                 git_print_header_div('shortlog');
8018                 git_shortlog_body(\@commitlist, 0, 15, $refs,
8019                                   $#commitlist <=  15 ? undef :
8020                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
8021         }
8022
8023         if (@taglist) {
8024                 git_print_header_div('tags');
8025                 git_tags_body(\@taglist, 0, 15,
8026                               $#taglist <=  15 ? undef :
8027                               $cgi->a({-href => href(action=>"tags")}, "..."));
8028         }
8029
8030         if (@headlist) {
8031                 git_print_header_div('heads');
8032                 git_heads_body(\@headlist, $head, 0, 15,
8033                                $#headlist <= 15 ? undef :
8034                                $cgi->a({-href => href(action=>"heads")}, "..."));
8035         }
8036
8037         if (%remotedata) {
8038                 git_print_header_div('remotes');
8039                 git_remotes_body(\%remotedata, 15, $head);
8040         }
8041
8042         if (@forklist) {
8043                 git_print_header_div('forks');
8044                 git_project_list_body(\@forklist, 'age', 0, 15,
8045                                       $#forklist <= 15 ? undef :
8046                                       $cgi->a({-href => href(action=>"forks")}, "..."),
8047                                       'no_header', 'forks');
8048         }
8049
8050         git_footer_html();
8051 }
8052
8053 sub git_tag {
8054         my %tag = parse_tag($hash);
8055
8056         if (! %tag) {
8057                 die_error(404, "Unknown tag object");
8058         }
8059
8060         my $fullhash;
8061         $fullhash = $hash if $hash =~ m/^[0-9a-fA-F]{40}$/;
8062         $fullhash = git_get_full_hash($project, $hash) unless $fullhash;
8063
8064         my $obj = $tag{'object'};
8065         git_header_html();
8066         if ($tag{'type'} eq 'commit') {
8067                 git_print_page_nav('','', $obj,undef,$obj);
8068                 git_print_header_div('commit', esc_html($tag{'name'}), $hash);
8069         } else {
8070                 if ($tag{'type'} eq 'tree') {
8071                         git_print_page_nav('',['commit','commitdiff'], undef,undef,$obj);
8072                 } else {
8073                         git_print_page_nav('',['commit','commitdiff','tree'], undef,undef,undef);
8074                 }
8075                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
8076         }
8077         print "<div class=\"title_text\">\n" .
8078               "<table class=\"object_header\">\n" .
8079               "<tr><td>tag</td><td class=\"sha1\">$fullhash</td></tr>\n" .
8080               "<tr>\n" .
8081               "<td>object</td>\n" .
8082               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
8083                                $tag{'object'}) . "</td>\n" .
8084               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
8085                                               $tag{'type'}) . "</td>\n" .
8086               "</tr>\n";
8087         if (defined($tag{'author'})) {
8088                 git_print_authorship_rows(\%tag, 'author');
8089         }
8090         print "</table>\n\n" .
8091               "</div>\n";
8092         print "<div class=\"page_body\">";
8093         my $comment = $tag{'comment'};
8094         foreach my $line (@$comment) {
8095                 chomp $line;
8096                 print esc_html($line, -nbsp=>1) . "<br/>\n";
8097         }
8098         print "</div>\n";
8099         git_footer_html();
8100 }
8101
8102 sub git_blame_common {
8103         my $format = shift || 'porcelain';
8104         if ($format eq 'porcelain' && $input_params{'javascript'}) {
8105                 $format = 'incremental';
8106                 $action = 'blame_incremental'; # for page title etc
8107         }
8108
8109         # permissions
8110         gitweb_check_feature('blame')
8111                 or die_error(403, "Blame view not allowed");
8112
8113         # error checking
8114         die_error(400, "No file name given") unless $file_name;
8115         $hash_base ||= git_get_head_hash($project);
8116         die_error(404, "Couldn't find base commit") unless $hash_base;
8117         my %co = parse_commit($hash_base)
8118                 or die_error(404, "Commit not found");
8119         my $ftype = "blob";
8120         if (!defined $hash) {
8121                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
8122                         or die_error(404, "Error looking up file");
8123         } else {
8124                 $ftype = git_get_type($hash);
8125                 if ($ftype !~ "blob") {
8126                         die_error(400, "Object is not a blob");
8127                 }
8128         }
8129
8130         my $fd;
8131         if ($format eq 'incremental') {
8132                 # get file contents (as base)
8133                 defined($fd = git_cmd_pipe 'cat-file', 'blob', $hash)
8134                         or die_error(500, "Open git-cat-file failed");
8135         } elsif ($format eq 'data') {
8136                 # run git-blame --incremental
8137                 defined($fd = git_cmd_pipe "blame", "--incremental",
8138                         $hash_base, "--", $file_name)
8139                         or die_error(500, "Open git-blame --incremental failed");
8140         } else {
8141                 # run git-blame --porcelain
8142                 defined($fd = git_cmd_pipe "blame", '-p',
8143                         $hash_base, '--', $file_name)
8144                         or die_error(500, "Open git-blame --porcelain failed");
8145         }
8146
8147         # incremental blame data returns early
8148         if ($format eq 'data') {
8149                 print $cgi->header(
8150                         -type=>"text/plain", -charset => "utf-8",
8151                         -status=> "200 OK");
8152                 local $| = 1; # output autoflush
8153                 while (<$fd>) {
8154                         print to_utf8($_);
8155                 }
8156                 close $fd
8157                         or print "ERROR $!\n";
8158
8159                 print 'END';
8160                 if (defined $t0 && gitweb_check_feature('timed')) {
8161                         print ' '.
8162                               tv_interval($t0, [ gettimeofday() ]).
8163                               ' '.$number_of_git_cmds;
8164                 }
8165                 print "\n";
8166
8167                 return;
8168         }
8169
8170         # page header
8171         git_header_html();
8172         my $formats_nav =
8173                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
8174                         "blob");
8175         $formats_nav .=
8176                 " | " .
8177                 $cgi->a({-href => href(action=>"history", -replay=>1)},
8178                         "history") .
8179                 " | " .
8180                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
8181                         "HEAD");
8182         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
8183         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
8184         git_print_page_path($file_name, $ftype, $hash_base);
8185
8186         # page body
8187         if ($format eq 'incremental') {
8188                 print "<noscript>\n<div class=\"error\"><center><b>\n".
8189                       "This page requires JavaScript to run.\n Use ".
8190                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
8191                               'this page').
8192                       " instead.\n".
8193                       "</b></center></div>\n</noscript>\n";
8194
8195                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
8196         }
8197
8198         print qq!<div class="page_body">\n!;
8199         print qq!<div id="progress_info">... / ...</div>\n!
8200                 if ($format eq 'incremental');
8201         print qq!<table id="blame_table" class="blame" width="100%">\n!.
8202               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
8203               qq!<thead>\n!.
8204               qq!<tr><th nowrap="nowrap" style="white-space:nowrap">!.
8205               qq!Commit&#160;<a href="javascript:extra_blame_columns()" id="columns_expander" !.
8206               qq!title="toggles blame author information display">[+]</a></th>!.
8207               qq!<th class="extra_column">Author</th><th class="extra_column">Date</th>!.
8208               qq!<th>Line</th><th width="100%">Data</th></tr>\n!.
8209               qq!</thead>\n!.
8210               qq!<tbody>\n!;
8211
8212         my @rev_color = qw(light dark);
8213         my $num_colors = scalar(@rev_color);
8214         my $current_color = 0;
8215
8216         if ($format eq 'incremental') {
8217                 my $color_class = $rev_color[$current_color];
8218
8219                 #contents of a file
8220                 my $linenr = 0;
8221         LINE:
8222                 while (my $line = to_utf8(scalar <$fd>)) {
8223                         chomp $line;
8224                         $linenr++;
8225
8226                         print qq!<tr id="l$linenr" class="$color_class">!.
8227                               qq!<td class="sha1"><a href=""> </a></td>!.
8228                               qq!<td class="extra_column" nowrap="nowrap"></td>!.
8229                               qq!<td class="extra_column" nowrap="nowrap"></td>!.
8230                               qq!<td class="linenr">!.
8231                               qq!<a class="linenr" href="">$linenr</a></td>!;
8232                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
8233                         print qq!</tr>\n!;
8234                 }
8235
8236         } else { # porcelain, i.e. ordinary blame
8237                 my %metainfo = (); # saves information about commits
8238
8239                 # blame data
8240         LINE:
8241                 while (my $line = to_utf8(scalar <$fd>)) {
8242                         chomp $line;
8243                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
8244                         # no <lines in group> for subsequent lines in group of lines
8245                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
8246                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
8247                         if (!exists $metainfo{$full_rev}) {
8248                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
8249                         }
8250                         my $meta = $metainfo{$full_rev};
8251                         my $data;
8252                         while ($data = to_utf8(scalar <$fd>)) {
8253                                 chomp $data;
8254                                 last if ($data =~ s/^\t//); # contents of line
8255                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
8256                                         $meta->{$1} = $2 unless exists $meta->{$1};
8257                                 }
8258                                 if ($data =~ /^previous /) {
8259                                         $meta->{'nprevious'}++;
8260                                 }
8261                         }
8262                         my $short_rev = substr($full_rev, 0, 8);
8263                         my $author = $meta->{'author'};
8264                         my %date =
8265                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
8266                         my $date = $date{'iso-tz'};
8267                         if ($group_size) {
8268                                 $current_color = ($current_color + 1) % $num_colors;
8269                         }
8270                         my $tr_class = $rev_color[$current_color];
8271                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
8272                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
8273                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
8274                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
8275                         if ($group_size) {
8276                                 my $rowspan = $group_size > 1 ? " rowspan=\"$group_size\"" : "";
8277                                 print "<td class=\"sha1\"";
8278                                 print " title=\"". esc_html($author) . ", $date\"";
8279                                 print "$rowspan>";
8280                                 print $cgi->a({-href => href(action=>"commit",
8281                                                              hash=>$full_rev,
8282                                                              file_name=>$file_name)},
8283                                               esc_html($short_rev));
8284                                 if ($group_size >= 2) {
8285                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
8286                                         if (@author_initials) {
8287                                                 print "<br />" .
8288                                                       esc_html(join('', @author_initials));
8289                                                 #           or join('.', ...)
8290                                         }
8291                                 }
8292                                 print "</td>\n";
8293                                 print "<td class=\"extra_column\" nowrap=\"nowrap\"$rowspan>". esc_html($author) . "</td>";
8294                                 print "<td class=\"extra_column\" nowrap=\"nowrap\"$rowspan>". $date . "</td>";
8295                         }
8296                         # 'previous' <sha1 of parent commit> <filename at commit>
8297                         if (exists $meta->{'previous'} &&
8298                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
8299                                 $meta->{'parent'} = $1;
8300                                 $meta->{'file_parent'} = unquote($2);
8301                         }
8302                         my $linenr_commit =
8303                                 exists($meta->{'parent'}) ?
8304                                 $meta->{'parent'} : $full_rev;
8305                         my $linenr_filename =
8306                                 exists($meta->{'file_parent'}) ?
8307                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
8308                         my $blamed = href(action => 'blame',
8309                                           file_name => $linenr_filename,
8310                                           hash_base => $linenr_commit);
8311                         print "<td class=\"linenr\">";
8312                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
8313                                         -class => "linenr" },
8314                                       esc_html($lineno));
8315                         print "</td>";
8316                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
8317                         print "</tr>\n";
8318                 } # end while
8319
8320         }
8321
8322         # footer
8323         print "</tbody>\n".
8324               "</table>\n"; # class="blame"
8325         print "</div>\n";   # class="blame_body"
8326         close $fd
8327                 or print "Reading blob failed\n";
8328
8329         git_footer_html();
8330 }
8331
8332 sub git_blame {
8333         git_blame_common();
8334 }
8335
8336 sub git_blame_incremental {
8337         git_blame_common('incremental');
8338 }
8339
8340 sub git_blame_data {
8341         git_blame_common('data');
8342 }
8343
8344 sub git_tags {
8345         my $head = git_get_head_hash($project);
8346         git_header_html();
8347         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
8348         git_print_header_div('summary', $project);
8349
8350         my @tagslist = git_get_tags_list();
8351         if (@tagslist) {
8352                 git_tags_body(\@tagslist);
8353         }
8354         git_footer_html();
8355 }
8356
8357 sub git_refs {
8358         my $order = $input_params{'order'};
8359         if (defined $order && $order !~ m/age|name/) {
8360                 die_error(400, "Unknown order parameter");
8361         }
8362
8363         my $head = git_get_head_hash($project);
8364         git_header_html();
8365         git_print_page_nav('','', $head,undef,$head,format_ref_views('refs'));
8366         git_print_header_div('summary', $project);
8367
8368         my @refslist = git_get_tags_list(undef, 1, $order);
8369         if (@refslist) {
8370                 git_tags_body(\@refslist, undef, undef, undef, $head, 1, $order);
8371         }
8372         git_footer_html();
8373 }
8374
8375 sub git_heads {
8376         my $head = git_get_head_hash($project);
8377         git_header_html();
8378         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
8379         git_print_header_div('summary', $project);
8380
8381         my @headslist = git_get_heads_list();
8382         if (@headslist) {
8383                 git_heads_body(\@headslist, $head);
8384         }
8385         git_footer_html();
8386 }
8387
8388 # used both for single remote view and for list of all the remotes
8389 sub git_remotes {
8390         gitweb_check_feature('remote_heads')
8391                 or die_error(403, "Remote heads view is disabled");
8392
8393         my $head = git_get_head_hash($project);
8394         my $remote = $input_params{'hash'};
8395
8396         my $remotedata = git_get_remotes_list($remote);
8397         die_error(500, "Unable to get remote information") unless defined $remotedata;
8398
8399         unless (%$remotedata) {
8400                 die_error(404, defined $remote ?
8401                         "Remote $remote not found" :
8402                         "No remotes found");
8403         }
8404
8405         git_header_html(undef, undef, -action_extra => $remote);
8406         git_print_page_nav('', '',  $head, undef, $head,
8407                 format_ref_views($remote ? '' : 'remotes'));
8408
8409         fill_remote_heads($remotedata);
8410         if (defined $remote) {
8411                 git_print_header_div('remotes', "$remote remote for $project");
8412                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
8413         } else {
8414                 git_print_header_div('summary', "$project remotes");
8415                 git_remotes_body($remotedata, undef, $head);
8416         }
8417
8418         git_footer_html();
8419 }
8420
8421 sub git_blob_plain {
8422         my $type = shift;
8423         my $expires;
8424
8425         if (!defined $hash) {
8426                 if (defined $file_name) {
8427                         my $base = $hash_base || git_get_head_hash($project);
8428                         $hash = git_get_hash_by_path($base, $file_name, "blob")
8429                                 or die_error(404, "Cannot find file");
8430                 } else {
8431                         die_error(400, "No file name defined");
8432                 }
8433         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8434                 # blobs defined by non-textual hash id's can be cached
8435                 $expires = "+1d";
8436         }
8437
8438         defined(my $fd = git_cmd_pipe "cat-file", "blob", $hash)
8439                 or die_error(500, "Open git-cat-file blob '$hash' failed");
8440         binmode($fd);
8441
8442         # content-type (can include charset)
8443         my $leader;
8444         ($type, $leader) = blob_contenttype($fd, $file_name, $type);
8445
8446         # "save as" filename, even when no $file_name is given
8447         my $save_as = "$hash";
8448         if (defined $file_name) {
8449                 $save_as = $file_name;
8450         } elsif ($type =~ m/^text\//) {
8451                 $save_as .= '.txt';
8452         }
8453
8454         # With XSS prevention on, blobs of all types except a few known safe
8455         # ones are served with "Content-Disposition: attachment" to make sure
8456         # they don't run in our security domain.  For certain image types,
8457         # blob view writes an <img> tag referring to blob_plain view, and we
8458         # want to be sure not to break that by serving the image as an
8459         # attachment (though Firefox 3 doesn't seem to care).
8460         my $sandbox = $prevent_xss &&
8461                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
8462
8463         # serve text/* as text/plain
8464         if ($prevent_xss &&
8465             ($type =~ m!^text/[a-z]+\b(.*)$! ||
8466              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
8467                 my $rest = $1;
8468                 $rest = defined $rest ? $rest : '';
8469                 $type = "text/plain$rest";
8470         }
8471
8472         print $cgi->header(
8473                 -type => $type,
8474                 -expires => $expires,
8475                 -content_disposition =>
8476                         ($sandbox ? 'attachment' : 'inline')
8477                         . '; filename="' . $save_as . '"');
8478         binmode STDOUT, ':raw';
8479         $fcgi_raw_mode = 1;
8480         print $leader if defined $leader;
8481         my $buf;
8482         while (read($fd, $buf, 32768)) {
8483                 print $buf;
8484         }
8485         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
8486         $fcgi_raw_mode = 0;
8487         close $fd;
8488 }
8489
8490 sub git_blob {
8491         my $expires;
8492
8493         if (!defined $hash) {
8494                 if (defined $file_name) {
8495                         my $base = $hash_base || git_get_head_hash($project);
8496                         $hash = git_get_hash_by_path($base, $file_name, "blob")
8497                                 or die_error(404, "Cannot find file");
8498                 } else {
8499                         die_error(400, "No file name defined");
8500                 }
8501         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8502                 # blobs defined by non-textual hash id's can be cached
8503                 $expires = "+1d";
8504         }
8505         my $fullhash = git_get_full_hash($project, "$hash^{blob}");
8506         die_error(404, "No such blob") unless defined($fullhash);
8507
8508         my $have_blame = gitweb_check_feature('blame');
8509         defined(my $fd = git_cmd_pipe "cat-file", "blob", $fullhash)
8510                 or die_error(500, "Couldn't cat $file_name, $hash");
8511         binmode($fd);
8512         my $mimetype = blob_mimetype($fd, $file_name);
8513         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
8514         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
8515                 close $fd;
8516                 return git_blob_plain($mimetype);
8517         }
8518         # we can have blame only for text/* mimetype
8519         $have_blame &&= ($mimetype =~ m!^text/!);
8520
8521         my $highlight = gitweb_check_feature('highlight') && defined $highlight_bin;
8522         my $syntax = guess_file_syntax($fd, $mimetype, $file_name) if $highlight;
8523         my $highlight_mode_active;
8524         ($fd, $highlight_mode_active) = run_highlighter($fd, $syntax) if $syntax;
8525
8526         git_header_html(undef, $expires);
8527         my $formats_nav = '';
8528         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
8529                 if (defined $file_name) {
8530                         if ($have_blame) {
8531                                 $formats_nav .=
8532                                         $cgi->a({-href => href(action=>"blame", -replay=>1),
8533                                                 -class => "blamelink"},
8534                                                 "blame") .
8535                                         " | ";
8536                         }
8537                         $formats_nav .=
8538                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
8539                                         "history") .
8540                                 " | " .
8541                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
8542                                         "raw") .
8543                                 " | " .
8544                                 $cgi->a({-href => href(action=>"blob",
8545                                                        hash_base=>"HEAD", file_name=>$file_name)},
8546                                         "HEAD");
8547                 } else {
8548                         $formats_nav .=
8549                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
8550                                         "raw");
8551                 }
8552                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
8553                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
8554         } else {
8555                 git_print_page_nav('',['commit','commitdiff','tree'], undef,undef,undef);
8556                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
8557         }
8558         git_print_page_path($file_name, "blob", $hash_base);
8559         print "<div class=\"title_text\">\n" .
8560               "<table class=\"object_header\">\n";
8561         print "<tr><td>blob</td><td class=\"sha1\">$fullhash</td></tr>\n";
8562         print "</table>".
8563               "</div>\n";
8564         print "<div class=\"page_body\">\n";
8565         if ($mimetype =~ m!^image/!) {
8566                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
8567                 if ($file_name) {
8568                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
8569                 }
8570                 print qq! src="! .
8571                       href(action=>"blob_plain", hash=>$hash,
8572                            hash_base=>$hash_base, file_name=>$file_name) .
8573                       qq!" />\n!;
8574                 close $fd; # ignore likely EPIPE error from child
8575         } else {
8576                 my $nr;
8577                 while (my $line = to_utf8(scalar <$fd>)) {
8578                         chomp $line;
8579                         $nr++;
8580                         $line = untabify($line);
8581                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i </a>%s</div>\n!,
8582                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
8583                                $highlight_mode_active ? sanitize($line) : esc_html($line, -nbsp=>1);
8584                 }
8585                 close $fd
8586                         or print "Reading blob failed.\n";
8587         }
8588         print "</div>";
8589         git_footer_html();
8590 }
8591
8592 sub git_tree {
8593         if (!defined $hash_base) {
8594                 $hash_base = "HEAD";
8595         }
8596         if (!defined $hash) {
8597                 if (defined $file_name) {
8598                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
8599                 } else {
8600                         $hash = $hash_base;
8601                 }
8602         }
8603         die_error(404, "No such tree") unless defined($hash);
8604         my $fullhash = git_get_full_hash($project, "$hash^{tree}");
8605         die_error(404, "No such tree") unless defined($fullhash);
8606
8607         my $show_sizes = gitweb_check_feature('show-sizes');
8608         my $have_blame = gitweb_check_feature('blame');
8609
8610         my @entries = ();
8611         {
8612                 local $/ = "\0";
8613                 defined(my $fd = git_cmd_pipe "ls-tree", '-z',
8614                         ($show_sizes ? '-l' : ()), @extra_options, $fullhash)
8615                         or die_error(500, "Open git-ls-tree failed");
8616                 @entries = map { chomp; to_utf8($_) } <$fd>;
8617                 close $fd
8618                         or die_error(404, "Reading tree failed");
8619         }
8620
8621         git_header_html();
8622         my $basedir = '';
8623         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
8624                 my $refs = git_get_references();
8625                 my $ref = format_ref_marker($refs, $co{'id'});
8626                 my @views_nav = ();
8627                 if (defined $file_name) {
8628                         push @views_nav,
8629                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
8630                                         "history"),
8631                                 $cgi->a({-href => href(action=>"tree",
8632                                                        hash_base=>"HEAD", file_name=>$file_name)},
8633                                         "HEAD"),
8634                 }
8635                 my $snapshot_links = format_snapshot_links($hash);
8636                 if (defined $snapshot_links) {
8637                         # FIXME: Should be available when we have no hash base as well.
8638                         push @views_nav, $snapshot_links;
8639                 }
8640                 git_print_page_nav('tree','', $hash_base, undef, undef,
8641                                    join(' | ', @views_nav));
8642                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base, undef, $ref);
8643         } else {
8644                 git_print_page_nav('tree',['commit','commitdiff'], undef,undef,$hash_base);
8645                 undef $hash_base;
8646                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
8647         }
8648         if (defined $file_name) {
8649                 $basedir = $file_name;
8650                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
8651                         $basedir .= '/';
8652                 }
8653                 git_print_page_path($file_name, 'tree', $hash_base);
8654         }
8655         print "<div class=\"title_text\">\n" .
8656               "<table class=\"object_header\">\n";
8657         print "<tr><td>tree</td><td class=\"sha1\">$fullhash</td></tr>\n";
8658         print "</table>".
8659               "</div>\n";
8660         print "<div class=\"page_body\">\n";
8661         print "<table class=\"tree\">\n";
8662         my $alternate = 1;
8663         # '..' (top directory) link if possible
8664         if (defined $hash_base &&
8665             defined $file_name && $file_name =~ m![^/]+$!) {
8666                 if ($alternate) {
8667                         print "<tr class=\"dark\">\n";
8668                 } else {
8669                         print "<tr class=\"light\">\n";
8670                 }
8671                 $alternate ^= 1;
8672
8673                 my $up = $file_name;
8674                 $up =~ s!/?[^/]+$!!;
8675                 undef $up unless $up;
8676                 # based on git_print_tree_entry
8677                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
8678                 print '<td class="size">&#160;</td>'."\n" if $show_sizes;
8679                 print '<td class="list">';
8680                 print $cgi->a({-href => href(action=>"tree",
8681                                              hash_base=>$hash_base,
8682                                              file_name=>$up)},
8683                               "..");
8684                 print "</td>\n";
8685                 print "<td class=\"link\"></td>\n";
8686
8687                 print "</tr>\n";
8688         }
8689         foreach my $line (@entries) {
8690                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
8691
8692                 if ($alternate) {
8693                         print "<tr class=\"dark\">\n";
8694                 } else {
8695                         print "<tr class=\"light\">\n";
8696                 }
8697                 $alternate ^= 1;
8698
8699                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
8700
8701                 print "</tr>\n";
8702         }
8703         print "</table>\n" .
8704               "</div>";
8705         git_footer_html();
8706 }
8707
8708 sub sanitize_for_filename {
8709     my $name = shift;
8710
8711     $name =~ s!/!-!g;
8712     $name =~ s/[^[:alnum:]_.-]//g;
8713
8714     return $name;
8715 }
8716
8717 sub snapshot_name {
8718         my ($project, $hash) = @_;
8719
8720         # path/to/project.git  -> project
8721         # path/to/project/.git -> project
8722         my $name = to_utf8($project);
8723         $name =~ s,([^/])/*\.git$,$1,;
8724         $name = sanitize_for_filename(basename($name));
8725
8726         my $ver = $hash;
8727         if ($hash =~ /^[0-9a-fA-F]+$/) {
8728                 # shorten SHA-1 hash
8729                 my $full_hash = git_get_full_hash($project, $hash);
8730                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
8731                         $ver = git_get_short_hash($project, $hash);
8732                 }
8733         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
8734                 # tags don't need shortened SHA-1 hash
8735                 $ver = $1;
8736         } else {
8737                 # branches and other need shortened SHA-1 hash
8738                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
8739                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
8740                         my $ref_dir = (defined $1) ? $1 : '';
8741                         $ver = $2;
8742
8743                         $ref_dir = sanitize_for_filename($ref_dir);
8744                         # for refs neither in heads nor remotes we want to
8745                         # add a ref dir to archive name
8746                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
8747                                 $ver = $ref_dir . '-' . $ver;
8748                         }
8749                 }
8750                 $ver .= '-' . git_get_short_hash($project, $hash);
8751         }
8752         # special case of sanitization for filename - we change
8753         # slashes to dots instead of dashes
8754         # in case of hierarchical branch names
8755         $ver =~ s!/!.!g;
8756         $ver =~ s/[^[:alnum:]_.-]//g;
8757
8758         # name = project-version_string
8759         $name = "$name-$ver";
8760
8761         return wantarray ? ($name, $name) : $name;
8762 }
8763
8764 sub exit_if_unmodified_since {
8765         my ($latest_epoch) = @_;
8766         our $cgi;
8767
8768         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
8769         if (defined $if_modified) {
8770                 my $since;
8771                 if (eval { require HTTP::Date; 1; }) {
8772                         $since = HTTP::Date::str2time($if_modified);
8773                 } elsif (eval { require Time::ParseDate; 1; }) {
8774                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
8775                 }
8776                 if (defined $since && $latest_epoch <= $since) {
8777                         my %latest_date = parse_date($latest_epoch);
8778                         print $cgi->header(
8779                                 -last_modified => $latest_date{'rfc2822'},
8780                                 -status => '304 Not Modified');
8781                         CORE::die;
8782                 }
8783         }
8784 }
8785
8786 sub git_snapshot {
8787         my $format = $input_params{'snapshot_format'};
8788         if (!@snapshot_fmts) {
8789                 die_error(403, "Snapshots not allowed");
8790         }
8791         # default to first supported snapshot format
8792         $format ||= $snapshot_fmts[0];
8793         if ($format !~ m/^[a-z0-9]+$/) {
8794                 die_error(400, "Invalid snapshot format parameter");
8795         } elsif (!exists($known_snapshot_formats{$format})) {
8796                 die_error(400, "Unknown snapshot format");
8797         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
8798                 die_error(403, "Snapshot format not allowed");
8799         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
8800                 die_error(403, "Unsupported snapshot format");
8801         }
8802
8803         my $type = git_get_type("$hash^{}");
8804         if (!$type) {
8805                 die_error(404, 'Object does not exist');
8806         }  elsif ($type eq 'blob') {
8807                 die_error(400, 'Object is not a tree-ish');
8808         }
8809
8810         my ($name, $prefix) = snapshot_name($project, $hash);
8811         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
8812
8813         my %co = parse_commit($hash);
8814         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
8815
8816         my @cmd = (
8817                 git_cmd(), 'archive',
8818                 "--format=$known_snapshot_formats{$format}{'format'}",
8819                 "--prefix=$prefix/", $hash);
8820         if (exists $known_snapshot_formats{$format}{'compressor'}) {
8821                 @cmd = ($posix_shell_bin, '-c', quote_command(@cmd) .
8822                         ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}}));
8823         }
8824
8825         $filename =~ s/(["\\])/\\$1/g;
8826         my %latest_date;
8827         if (%co) {
8828                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
8829         }
8830
8831         print $cgi->header(
8832                 -type => $known_snapshot_formats{$format}{'type'},
8833                 -content_disposition => 'inline; filename="' . $filename . '"',
8834                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
8835                 -status => '200 OK');
8836
8837         defined(my $fd = cmd_pipe @cmd)
8838                 or die_error(500, "Execute git-archive failed");
8839         binmode($fd);
8840         binmode STDOUT, ':raw';
8841         $fcgi_raw_mode = 1;
8842         my $buf;
8843         while (read($fd, $buf, 32768)) {
8844                 print $buf;
8845         }
8846         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
8847         $fcgi_raw_mode = 0;
8848         close $fd;
8849 }
8850
8851 sub git_log_generic {
8852         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
8853
8854         my $head = git_get_head_hash($project);
8855         if (!defined $base) {
8856                 $base = $head;
8857         }
8858         if (!defined $page) {
8859                 $page = 0;
8860         }
8861         my $refs = git_get_references();
8862
8863         my $commit_hash = $base;
8864         if (defined $parent) {
8865                 $commit_hash = "$parent..$base";
8866         }
8867         my @commitlist =
8868                 parse_commits($commit_hash, 101, (100 * $page),
8869                               defined $file_name ? ($file_name, "--full-history") : ());
8870
8871         my $ftype;
8872         if (!defined $file_hash && defined $file_name) {
8873                 # some commits could have deleted file in question,
8874                 # and not have it in tree, but one of them has to have it
8875                 for (my $i = 0; $i < @commitlist; $i++) {
8876                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
8877                         last if defined $file_hash;
8878                 }
8879         }
8880         if (defined $file_hash) {
8881                 $ftype = git_get_type($file_hash);
8882         }
8883         if (defined $file_name && !defined $ftype) {
8884                 die_error(500, "Unknown type of object");
8885         }
8886         my %co;
8887         if (defined $file_name) {
8888                 %co = parse_commit($base)
8889                         or die_error(404, "Unknown commit object");
8890         }
8891
8892
8893         my $paging_nav = format_log_nav($fmt_name, $page, $#commitlist >= 100);
8894         my $next_link = '';
8895         if ($#commitlist >= 100) {
8896                 $next_link =
8897                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
8898                                  -accesskey => "n", -title => "Alt-n"}, "next");
8899         }
8900         my ($patch_max) = gitweb_get_feature('patches');
8901         if ($patch_max && !defined $file_name) {
8902                 if ($patch_max < 0 || @commitlist <= $patch_max) {
8903                         $paging_nav .= " &#183; " .
8904                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
8905                                         "patches");
8906                 }
8907         }
8908
8909         {
8910                 local $action = 'log';
8911                 git_header_html();
8912         }
8913         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
8914         if (defined $file_name) {
8915                 git_print_header_div('commit', esc_html($co{'title'}), $base);
8916         } else {
8917                 git_print_header_div('summary', $project)
8918         }
8919         git_print_page_path($file_name, $ftype, $hash_base)
8920                 if (defined $file_name);
8921
8922         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
8923                      $file_name, $file_hash, $ftype);
8924
8925         git_footer_html();
8926 }
8927
8928 sub git_log {
8929         git_log_generic('log', \&git_log_body,
8930                         $hash, $hash_parent);
8931 }
8932
8933 sub git_commit {
8934         $hash ||= $hash_base || "HEAD";
8935         my %co = parse_commit($hash)
8936             or die_error(404, "Unknown commit object");
8937
8938         my $parent  = $co{'parent'};
8939         my $parents = $co{'parents'}; # listref
8940
8941         # we need to prepare $formats_nav before any parameter munging
8942         my $formats_nav;
8943         if (!defined $parent) {
8944                 # --root commitdiff
8945                 $formats_nav .= '(initial)';
8946         } elsif (@$parents == 1) {
8947                 # single parent commit
8948                 $formats_nav .=
8949                         '(parent: ' .
8950                         $cgi->a({-href => href(action=>"commit",
8951                                                hash=>$parent)},
8952                                 esc_html(substr($parent, 0, 7))) .
8953                         ')';
8954         } else {
8955                 # merge commit
8956                 $formats_nav .=
8957                         '(merge: ' .
8958                         join(' ', map {
8959                                 $cgi->a({-href => href(action=>"commit",
8960                                                        hash=>$_)},
8961                                         esc_html(substr($_, 0, 7)));
8962                         } @$parents ) .
8963                         ')';
8964         }
8965         if (gitweb_check_feature('patches') && @$parents <= 1) {
8966                 $formats_nav .= " | " .
8967                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
8968                                 "patch");
8969         }
8970
8971         if (!defined $parent) {
8972                 $parent = "--root";
8973         }
8974         my @difftree;
8975         defined(my $fd = git_cmd_pipe "diff-tree", '-r', "--no-commit-id",
8976                 @diff_opts,
8977                 (@$parents <= 1 ? $parent : '-c'),
8978                 $hash, "--")
8979                 or die_error(500, "Open git-diff-tree failed");
8980         @difftree = map { chomp; to_utf8($_) } <$fd>;
8981         close $fd or die_error(404, "Reading git-diff-tree failed");
8982
8983         # non-textual hash id's can be cached
8984         my $expires;
8985         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8986                 $expires = "+1d";
8987         }
8988         my $refs = git_get_references();
8989         my $ref = format_ref_marker($refs, $co{'id'});
8990
8991         git_header_html(undef, $expires);
8992         git_print_page_nav('commit', '',
8993                            $hash, $co{'tree'}, $hash,
8994                            $formats_nav);
8995
8996         if (defined $co{'parent'}) {
8997                 git_print_header_div('commitdiff', esc_html($co{'title'}), $hash, undef, $ref);
8998         } else {
8999                 git_print_header_div('tree', esc_html($co{'title'}), $co{'tree'}, $hash, $ref);
9000         }
9001         print "<div class=\"title_text\">\n" .
9002               "<table class=\"object_header\">\n";
9003         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
9004         git_print_authorship_rows(\%co);
9005         print "<tr>" .
9006               "<td>tree</td>" .
9007               "<td class=\"sha1\">" .
9008               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
9009                        class => "list"}, $co{'tree'}) .
9010               "</td>" .
9011               "<td class=\"link\">" .
9012               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
9013                       "tree");
9014         my $snapshot_links = format_snapshot_links($hash);
9015         if (defined $snapshot_links) {
9016                 print " | " . $snapshot_links;
9017         }
9018         print "</td>" .
9019               "</tr>\n";
9020
9021         foreach my $par (@$parents) {
9022                 print "<tr>" .
9023                       "<td>parent</td>" .
9024                       "<td class=\"sha1\">" .
9025                       $cgi->a({-href => href(action=>"commit", hash=>$par),
9026                                class => "list"}, $par) .
9027                       "</td>" .
9028                       "<td class=\"link\">" .
9029                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
9030                       " | " .
9031                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
9032                       "</td>" .
9033                       "</tr>\n";
9034         }
9035         print "</table>".
9036               "</div>\n";
9037
9038         print "<div class=\"page_body\">\n";
9039         git_print_log($co{'comment'});
9040         print "</div>\n";
9041
9042         git_difftree_body(\@difftree, $hash, @$parents);
9043
9044         git_footer_html();
9045 }
9046
9047 sub git_object {
9048         # object is defined by:
9049         # - hash or hash_base alone
9050         # - hash_base and file_name
9051         my $type;
9052
9053         # - hash or hash_base alone
9054         if ($hash || ($hash_base && !defined $file_name)) {
9055                 my $object_id = $hash || $hash_base;
9056
9057                 defined(my $fd = git_cmd_pipe 'cat-file', '-t', $object_id)
9058                         or die_error(404, "Object does not exist");
9059                 $type = <$fd>;
9060                 defined $type && chomp $type;
9061                 close $fd
9062                         or die_error(404, "Object does not exist");
9063
9064         # - hash_base and file_name
9065         } elsif ($hash_base && defined $file_name) {
9066                 $file_name =~ s,/+$,,;
9067
9068                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
9069                         or die_error(404, "Base object does not exist");
9070
9071                 # here errors should not happen
9072                 defined(my $fd = git_cmd_pipe "ls-tree", $hash_base, "--", $file_name)
9073                         or die_error(500, "Open git-ls-tree failed");
9074                 my $line = to_utf8(scalar <$fd>);
9075                 close $fd;
9076
9077                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
9078                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
9079                         die_error(404, "File or directory for given base does not exist");
9080                 }
9081                 $type = $2;
9082                 $hash = $3;
9083         } else {
9084                 die_error(400, "Not enough information to find object");
9085         }
9086
9087         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
9088                                           hash=>$hash, hash_base=>$hash_base,
9089                                           file_name=>$file_name),
9090                              -status => '302 Found');
9091 }
9092
9093 sub git_blobdiff {
9094         my $format = shift || 'html';
9095         my $diff_style = $input_params{'diff_style'} || 'inline';
9096
9097         my $fd;
9098         my @difftree;
9099         my %diffinfo;
9100         my $expires;
9101
9102         # preparing $fd and %diffinfo for git_patchset_body
9103         # new style URI
9104         if (defined $hash_base && defined $hash_parent_base) {
9105                 if (defined $file_name) {
9106                         # read raw output
9107                         defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9108                                 $hash_parent_base, $hash_base,
9109                                 "--", (defined $file_parent ? $file_parent : ()), $file_name)
9110                                 or die_error(500, "Open git-diff-tree failed");
9111                         @difftree = map { chomp; to_utf8($_) } <$fd>;
9112                         close $fd
9113                                 or die_error(404, "Reading git-diff-tree failed");
9114                         @difftree
9115                                 or die_error(404, "Blob diff not found");
9116
9117                 } elsif (defined $hash &&
9118                          $hash =~ /[0-9a-fA-F]{40}/) {
9119                         # try to find filename from $hash
9120
9121                         # read filtered raw output
9122                         defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9123                                 $hash_parent_base, $hash_base, "--")
9124                                 or die_error(500, "Open git-diff-tree failed");
9125                         @difftree =
9126                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
9127                                 # $hash == to_id
9128                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
9129                                 map { chomp; to_utf8($_) } <$fd>;
9130                         close $fd
9131                                 or die_error(404, "Reading git-diff-tree failed");
9132                         @difftree
9133                                 or die_error(404, "Blob diff not found");
9134
9135                 } else {
9136                         die_error(400, "Missing one of the blob diff parameters");
9137                 }
9138
9139                 if (@difftree > 1) {
9140                         die_error(400, "Ambiguous blob diff specification");
9141                 }
9142
9143                 %diffinfo = parse_difftree_raw_line($difftree[0]);
9144                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
9145                 $file_name   ||= $diffinfo{'to_file'};
9146
9147                 $hash_parent ||= $diffinfo{'from_id'};
9148                 $hash        ||= $diffinfo{'to_id'};
9149
9150                 # non-textual hash id's can be cached
9151                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
9152                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
9153                         $expires = '+1d';
9154                 }
9155
9156                 # open patch output
9157                 defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9158                         '-p', ($format eq 'html' ? "--full-index" : ()),
9159                         $hash_parent_base, $hash_base,
9160                         "--", (defined $file_parent ? $file_parent : ()), $file_name)
9161                         or die_error(500, "Open git-diff-tree failed");
9162         }
9163
9164         # old/legacy style URI -- not generated anymore since 1.4.3.
9165         if (!%diffinfo) {
9166                 die_error('404 Not Found', "Missing one of the blob diff parameters")
9167         }
9168
9169         # header
9170         if ($format eq 'html') {
9171                 my $formats_nav =
9172                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
9173                                 "raw");
9174                 $formats_nav .= diff_style_nav($diff_style);
9175                 git_header_html(undef, $expires);
9176                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
9177                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
9178                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
9179                 } else {
9180                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
9181                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
9182                 }
9183                 if (defined $file_name) {
9184                         git_print_page_path($file_name, "blob", $hash_base);
9185                 } else {
9186                         print "<div class=\"page_path\"></div>\n";
9187                 }
9188
9189         } elsif ($format eq 'plain') {
9190                 print $cgi->header(
9191                         -type => 'text/plain',
9192                         -charset => 'utf-8',
9193                         -expires => $expires,
9194                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
9195
9196                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
9197
9198         } else {
9199                 die_error(400, "Unknown blobdiff format");
9200         }
9201
9202         # patch
9203         if ($format eq 'html') {
9204                 print "<div class=\"page_body\">\n";
9205
9206                 git_patchset_body($fd, $diff_style,
9207                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
9208                 close $fd;
9209
9210                 print "</div>\n"; # class="page_body"
9211                 git_footer_html();
9212
9213         } else {
9214                 while (my $line = to_utf8(scalar <$fd>)) {
9215                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
9216                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
9217
9218                         print $line;
9219
9220                         last if $line =~ m!^\+\+\+!;
9221                 }
9222                 while (<$fd>) {
9223                         print to_utf8($_);
9224                 }
9225                 close $fd;
9226         }
9227 }
9228
9229 sub git_blobdiff_plain {
9230         git_blobdiff('plain');
9231 }
9232
9233 # assumes that it is added as later part of already existing navigation,
9234 # so it returns "| foo | bar" rather than just "foo | bar"
9235 sub diff_style_nav {
9236         my ($diff_style, $is_combined) = @_;
9237         $diff_style ||= 'inline';
9238
9239         return "" if ($is_combined);
9240
9241         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
9242         my %styles = @styles;
9243         @styles =
9244                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
9245
9246         return join '',
9247                 map { " | ".$_ }
9248                 map {
9249                         $_ eq $diff_style ? $styles{$_} :
9250                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
9251                 } @styles;
9252 }
9253
9254 sub git_commitdiff {
9255         my %params = @_;
9256         my $format = $params{-format} || 'html';
9257         my $diff_style = $input_params{'diff_style'} || 'inline';
9258
9259         my ($patch_max) = gitweb_get_feature('patches');
9260         if ($format eq 'patch') {
9261                 die_error(403, "Patch view not allowed") unless $patch_max;
9262         }
9263
9264         $hash ||= $hash_base || "HEAD";
9265         my %co = parse_commit($hash)
9266             or die_error(404, "Unknown commit object");
9267
9268         # choose format for commitdiff for merge
9269         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
9270                 $hash_parent = '--cc';
9271         }
9272         # we need to prepare $formats_nav before almost any parameter munging
9273         my $formats_nav;
9274         if ($format eq 'html') {
9275                 $formats_nav =
9276                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
9277                                 "raw");
9278                 if ($patch_max && @{$co{'parents'}} <= 1) {
9279                         $formats_nav .= " | " .
9280                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
9281                                         "patch");
9282                 }
9283                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
9284
9285                 if (defined $hash_parent &&
9286                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
9287                         # commitdiff with two commits given
9288                         my $hash_parent_short = $hash_parent;
9289                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
9290                                 $hash_parent_short = substr($hash_parent, 0, 7);
9291                         }
9292                         $formats_nav .=
9293                                 ' (from';
9294                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
9295                                 if ($co{'parents'}[$i] eq $hash_parent) {
9296                                         $formats_nav .= ' parent ' . ($i+1);
9297                                         last;
9298                                 }
9299                         }
9300                         $formats_nav .= ': ' .
9301                                 $cgi->a({-href => href(-replay=>1,
9302                                                        hash=>$hash_parent, hash_base=>undef)},
9303                                         esc_html($hash_parent_short)) .
9304                                 ')';
9305                 } elsif (!$co{'parent'}) {
9306                         # --root commitdiff
9307                         $formats_nav .= ' (initial)';
9308                 } elsif (scalar @{$co{'parents'}} == 1) {
9309                         # single parent commit
9310                         $formats_nav .=
9311                                 ' (parent: ' .
9312                                 $cgi->a({-href => href(-replay=>1,
9313                                                        hash=>$co{'parent'}, hash_base=>undef)},
9314                                         esc_html(substr($co{'parent'}, 0, 7))) .
9315                                 ')';
9316                 } else {
9317                         # merge commit
9318                         if ($hash_parent eq '--cc') {
9319                                 $formats_nav .= ' | ' .
9320                                         $cgi->a({-href => href(-replay=>1,
9321                                                                hash=>$hash, hash_parent=>'-c')},
9322                                                 'combined');
9323                         } else { # $hash_parent eq '-c'
9324                                 $formats_nav .= ' | ' .
9325                                         $cgi->a({-href => href(-replay=>1,
9326                                                                hash=>$hash, hash_parent=>'--cc')},
9327                                                 'compact');
9328                         }
9329                         $formats_nav .=
9330                                 ' (merge: ' .
9331                                 join(' ', map {
9332                                         $cgi->a({-href => href(-replay=>1,
9333                                                                hash=>$_, hash_base=>undef)},
9334                                                 esc_html(substr($_, 0, 7)));
9335                                 } @{$co{'parents'}} ) .
9336                                 ')';
9337                 }
9338         }
9339
9340         my $hash_parent_param = $hash_parent;
9341         if (!defined $hash_parent_param) {
9342                 # --cc for multiple parents, --root for parentless
9343                 $hash_parent_param =
9344                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
9345         }
9346
9347         # read commitdiff
9348         my $fd;
9349         my @difftree;
9350         if ($format eq 'html') {
9351                 defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9352                         "--no-commit-id", "--patch-with-raw", "--full-index",
9353                         $hash_parent_param, $hash, "--")
9354                         or die_error(500, "Open git-diff-tree failed");
9355
9356                 while (my $line = to_utf8(scalar <$fd>)) {
9357                         chomp $line;
9358                         # empty line ends raw part of diff-tree output
9359                         last unless $line;
9360                         push @difftree, scalar parse_difftree_raw_line($line);
9361                 }
9362
9363         } elsif ($format eq 'plain') {
9364                 defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9365                         '-p', $hash_parent_param, $hash, "--")
9366                         or die_error(500, "Open git-diff-tree failed");
9367         } elsif ($format eq 'patch') {
9368                 # For commit ranges, we limit the output to the number of
9369                 # patches specified in the 'patches' feature.
9370                 # For single commits, we limit the output to a single patch,
9371                 # diverging from the git-format-patch default.
9372                 my @commit_spec = ();
9373                 if ($hash_parent) {
9374                         if ($patch_max > 0) {
9375                                 push @commit_spec, "-$patch_max";
9376                         }
9377                         push @commit_spec, '-n', "$hash_parent..$hash";
9378                 } else {
9379                         if ($params{-single}) {
9380                                 push @commit_spec, '-1';
9381                         } else {
9382                                 if ($patch_max > 0) {
9383                                         push @commit_spec, "-$patch_max";
9384                                 }
9385                                 push @commit_spec, "-n";
9386                         }
9387                         push @commit_spec, '--root', $hash;
9388                 }
9389                 defined($fd = git_cmd_pipe "format-patch", @diff_opts,
9390                         '--encoding=utf8', '--stdout', @commit_spec)
9391                         or die_error(500, "Open git-format-patch failed");
9392         } else {
9393                 die_error(400, "Unknown commitdiff format");
9394         }
9395
9396         # non-textual hash id's can be cached
9397         my $expires;
9398         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
9399                 $expires = "+1d";
9400         }
9401
9402         # write commit message
9403         if ($format eq 'html') {
9404                 my $refs = git_get_references();
9405                 my $ref = format_ref_marker($refs, $co{'id'});
9406
9407                 git_header_html(undef, $expires);
9408                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
9409                 git_print_header_div('commit', esc_html($co{'title'}), $hash, undef, $ref);
9410                 print "<div class=\"title_text\">\n" .
9411                       "<table class=\"object_header\">\n";
9412                 git_print_authorship_rows(\%co);
9413                 print "</table>".
9414                       "</div>\n";
9415                 print "<div class=\"page_body\">\n";
9416                 if (@{$co{'comment'}} > 1) {
9417                         print "<div class=\"log\">\n";
9418                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
9419                         print "</div>\n"; # class="log"
9420                 }
9421
9422         } elsif ($format eq 'plain') {
9423                 my $refs = git_get_references("tags");
9424                 my $tagname = git_get_rev_name_tags($hash);
9425                 my $filename = basename($project) . "-$hash.patch";
9426
9427                 print $cgi->header(
9428                         -type => 'text/plain',
9429                         -charset => 'utf-8',
9430                         -expires => $expires,
9431                         -content_disposition => 'inline; filename="' . "$filename" . '"');
9432                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
9433                 print "From: " . to_utf8($co{'author'}) . "\n";
9434                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
9435                 print "Subject: " . to_utf8($co{'title'}) . "\n";
9436
9437                 print "X-Git-Tag: $tagname\n" if $tagname;
9438                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
9439
9440                 foreach my $line (@{$co{'comment'}}) {
9441                         print to_utf8($line) . "\n";
9442                 }
9443                 print "---\n\n";
9444         } elsif ($format eq 'patch') {
9445                 my $filename = basename($project) . "-$hash.patch";
9446
9447                 print $cgi->header(
9448                         -type => 'text/plain',
9449                         -charset => 'utf-8',
9450                         -expires => $expires,
9451                         -content_disposition => 'inline; filename="' . "$filename" . '"');
9452         }
9453
9454         # write patch
9455         if ($format eq 'html') {
9456                 my $use_parents = !defined $hash_parent ||
9457                         $hash_parent eq '-c' || $hash_parent eq '--cc';
9458                 git_difftree_body(\@difftree, $hash,
9459                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
9460                 print "<br/>\n";
9461
9462                 git_patchset_body($fd, $diff_style,
9463                                   \@difftree, $hash,
9464                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
9465                 close $fd;
9466                 print "</div>\n"; # class="page_body"
9467                 git_footer_html();
9468
9469         } elsif ($format eq 'plain') {
9470                 while (<$fd>) {
9471                         print to_utf8($_);
9472                 }
9473                 close $fd
9474                         or print "Reading git-diff-tree failed\n";
9475         } elsif ($format eq 'patch') {
9476                 while (<$fd>) {
9477                         print to_utf8($_);
9478                 }
9479                 close $fd
9480                         or print "Reading git-format-patch failed\n";
9481         }
9482 }
9483
9484 sub git_commitdiff_plain {
9485         git_commitdiff(-format => 'plain');
9486 }
9487
9488 # format-patch-style patches
9489 sub git_patch {
9490         git_commitdiff(-format => 'patch', -single => 1);
9491 }
9492
9493 sub git_patches {
9494         git_commitdiff(-format => 'patch');
9495 }
9496
9497 sub git_history {
9498         git_log_generic('history', \&git_history_body,
9499                         $hash_base, $hash_parent_base,
9500                         $file_name, $hash);
9501 }
9502
9503 sub git_search {
9504         $searchtype ||= 'commit';
9505
9506         # check if appropriate features are enabled
9507         gitweb_check_feature('search')
9508                 or die_error(403, "Search is disabled");
9509         if ($searchtype eq 'pickaxe') {
9510                 # pickaxe may take all resources of your box and run for several minutes
9511                 # with every query - so decide by yourself how public you make this feature
9512                 gitweb_check_feature('pickaxe')
9513                         or die_error(403, "Pickaxe search is disabled");
9514         }
9515         if ($searchtype eq 'grep') {
9516                 # grep search might be potentially CPU-intensive, too
9517                 gitweb_check_feature('grep')
9518                         or die_error(403, "Grep search is disabled");
9519         }
9520         if ($search_use_regexp) {
9521                 # regular expression search can be disabled to avoid potentially
9522                 # malicious regular expressions
9523                 gitweb_check_feature('regexp')
9524                         or die_error(403, "Regular expression search is disabled");
9525         }
9526
9527         if (!defined $searchtext) {
9528                 die_error(400, "Text field is empty");
9529         }
9530         if (!defined $hash) {
9531                 $hash = git_get_head_hash($project);
9532         }
9533         my %co = parse_commit($hash);
9534         if (!%co) {
9535                 die_error(404, "Unknown commit object");
9536         }
9537         if (!defined $page) {
9538                 $page = 0;
9539         }
9540
9541         if ($searchtype eq 'commit' ||
9542             $searchtype eq 'author' ||
9543             $searchtype eq 'committer') {
9544                 git_search_message(%co);
9545         } elsif ($searchtype eq 'pickaxe') {
9546                 git_search_changes(%co);
9547         } elsif ($searchtype eq 'grep') {
9548                 git_search_files(%co);
9549         } else {
9550                 die_error(400, "Unknown search type");
9551         }
9552 }
9553
9554 sub git_search_help {
9555         git_header_html();
9556         git_print_page_nav('','', $hash,$hash,$hash);
9557         print <<EOT;
9558 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
9559 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
9560 the pattern entered is recognized as the POSIX extended
9561 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
9562 insensitive).</p>
9563 <dl>
9564 <dt><b>commit</b></dt>
9565 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
9566 EOT
9567         my $have_grep = gitweb_check_feature('grep');
9568         if ($have_grep) {
9569                 print <<EOT;
9570 <dt><b>grep</b></dt>
9571 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
9572     a different one) are searched for the given pattern. On large trees, this search can take
9573 a while and put some strain on the server, so please use it with some consideration. Note that
9574 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
9575 case-sensitive.</dd>
9576 EOT
9577         }
9578         print <<EOT;
9579 <dt><b>author</b></dt>
9580 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
9581 <dt><b>committer</b></dt>
9582 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
9583 EOT
9584         my $have_pickaxe = gitweb_check_feature('pickaxe');
9585         if ($have_pickaxe) {
9586                 print <<EOT;
9587 <dt><b>pickaxe</b></dt>
9588 <dd>All commits that caused the string to appear or disappear from any file (changes that
9589 added, removed or "modified" the string) will be listed. This search can take a while and
9590 takes a lot of strain on the server, so please use it wisely. Note that since you may be
9591 interested even in changes just changing the case as well, this search is case sensitive.</dd>
9592 EOT
9593         }
9594         print "</dl>\n";
9595         git_footer_html();
9596 }
9597
9598 sub git_shortlog {
9599         git_log_generic('shortlog', \&git_shortlog_body,
9600                         $hash, $hash_parent);
9601 }
9602
9603 ## ......................................................................
9604 ## feeds (RSS, Atom; OPML)
9605
9606 sub git_feed {
9607         my $format = shift || 'atom';
9608         my $have_blame = gitweb_check_feature('blame');
9609
9610         # Atom: http://www.atomenabled.org/developers/syndication/
9611         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
9612         if ($format ne 'rss' && $format ne 'atom') {
9613                 die_error(400, "Unknown web feed format");
9614         }
9615
9616         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
9617         my $head = $hash || 'HEAD';
9618         my @commitlist = parse_commits($head, 150, 0, $file_name);
9619
9620         my %latest_commit;
9621         my %latest_date;
9622         my $content_type = "application/$format+xml";
9623         if (defined $cgi->http('HTTP_ACCEPT') &&
9624                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
9625                 # browser (feed reader) prefers text/xml
9626                 $content_type = 'text/xml';
9627         }
9628         if (defined($commitlist[0])) {
9629                 %latest_commit = %{$commitlist[0]};
9630                 my $latest_epoch = $latest_commit{'committer_epoch'};
9631                 exit_if_unmodified_since($latest_epoch);
9632                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
9633         }
9634         print $cgi->header(
9635                 -type => $content_type,
9636                 -charset => 'utf-8',
9637                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
9638                 -status => '200 OK');
9639
9640         # Optimization: skip generating the body if client asks only
9641         # for Last-Modified date.
9642         return if ($cgi->request_method() eq 'HEAD');
9643
9644         # header variables
9645         my $title = "$site_name - $project/$action";
9646         my $feed_type = 'log';
9647         if (defined $hash) {
9648                 $title .= " - '$hash'";
9649                 $feed_type = 'branch log';
9650                 if (defined $file_name) {
9651                         $title .= " :: $file_name";
9652                         $feed_type = 'history';
9653                 }
9654         } elsif (defined $file_name) {
9655                 $title .= " - $file_name";
9656                 $feed_type = 'history';
9657         }
9658         $title .= " $feed_type";
9659         $title = esc_html($title);
9660         my $descr = git_get_project_description($project);
9661         if (defined $descr) {
9662                 $descr = esc_html($descr);
9663         } else {
9664                 $descr = "$project " .
9665                          ($format eq 'rss' ? 'RSS' : 'Atom') .
9666                          " feed";
9667         }
9668         my $owner = git_get_project_owner($project);
9669         $owner = esc_html($owner);
9670
9671         #header
9672         my $alt_url;
9673         if (defined $file_name) {
9674                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
9675         } elsif (defined $hash) {
9676                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
9677         } else {
9678                 $alt_url = href(-full=>1, action=>"summary");
9679         }
9680         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
9681         if ($format eq 'rss') {
9682                 print <<XML;
9683 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
9684 <channel>
9685 XML
9686                 print "<title>$title</title>\n" .
9687                       "<link>$alt_url</link>\n" .
9688                       "<description>$descr</description>\n" .
9689                       "<language>en</language>\n" .
9690                       # project owner is responsible for 'editorial' content
9691                       "<managingEditor>$owner</managingEditor>\n";
9692                 if (defined $logo || defined $favicon) {
9693                         # prefer the logo to the favicon, since RSS
9694                         # doesn't allow both
9695                         my $img = esc_url($logo || $favicon);
9696                         print "<image>\n" .
9697                               "<url>$img</url>\n" .
9698                               "<title>$title</title>\n" .
9699                               "<link>$alt_url</link>\n" .
9700                               "</image>\n";
9701                 }
9702                 if (%latest_date) {
9703                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
9704                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
9705                 }
9706                 print "<generator>gitweb v.$version/$git_version</generator>\n";
9707         } elsif ($format eq 'atom') {
9708                 print <<XML;
9709 <feed xmlns="http://www.w3.org/2005/Atom">
9710 XML
9711                 print "<title>$title</title>\n" .
9712                       "<subtitle>$descr</subtitle>\n" .
9713                       '<link rel="alternate" type="text/html" href="' .
9714                       $alt_url . '" />' . "\n" .
9715                       '<link rel="self" type="' . $content_type . '" href="' .
9716                       $cgi->self_url() . '" />' . "\n" .
9717                       "<id>" . href(-full=>1) . "</id>\n" .
9718                       # use project owner for feed author
9719                       '<author><name>'. email_obfuscate($owner) . '</name></author>\n';
9720                 if (defined $favicon) {
9721                         print "<icon>" . esc_url($favicon) . "</icon>\n";
9722                 }
9723                 if (defined $logo) {
9724                         # not twice as wide as tall: 72 x 27 pixels
9725                         print "<logo>" . esc_url($logo) . "</logo>\n";
9726                 }
9727                 if (! %latest_date) {
9728                         # dummy date to keep the feed valid until commits trickle in:
9729                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
9730                 } else {
9731                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
9732                 }
9733                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
9734         }
9735
9736         # contents
9737         for (my $i = 0; $i <= $#commitlist; $i++) {
9738                 my %co = %{$commitlist[$i]};
9739                 my $commit = $co{'id'};
9740                 # we read 150, we always show 30 and the ones more recent than 48 hours
9741                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
9742                         last;
9743                 }
9744                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
9745
9746                 # get list of changed files
9747                 defined(my $fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9748                         $co{'parent'} || "--root",
9749                         $co{'id'}, "--", (defined $file_name ? $file_name : ()))
9750                         or next;
9751                 my @difftree = map { chomp; to_utf8($_) } <$fd>;
9752                 close $fd
9753                         or next;
9754
9755                 # print element (entry, item)
9756                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
9757                 if ($format eq 'rss') {
9758                         print "<item>\n" .
9759                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
9760                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
9761                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
9762                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
9763                               "<link>$co_url</link>\n" .
9764                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
9765                               "<content:encoded>" .
9766                               "<![CDATA[\n";
9767                 } elsif ($format eq 'atom') {
9768                         print "<entry>\n" .
9769                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
9770                               "<updated>$cd{'iso-8601'}</updated>\n" .
9771                               "<author>\n" .
9772                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
9773                         if ($co{'author_email'}) {
9774                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
9775                         }
9776                         print "</author>\n" .
9777                               # use committer for contributor
9778                               "<contributor>\n" .
9779                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
9780                         if ($co{'committer_email'}) {
9781                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
9782                         }
9783                         print "</contributor>\n" .
9784                               "<published>$cd{'iso-8601'}</published>\n" .
9785                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
9786                               "<id>$co_url</id>\n" .
9787                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
9788                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
9789                 }
9790                 my $comment = $co{'comment'};
9791                 print "<pre>\n";
9792                 foreach my $line (@$comment) {
9793                         $line = esc_html($line);
9794                         print "$line\n";
9795                 }
9796                 print "</pre><ul>\n";
9797                 foreach my $difftree_line (@difftree) {
9798                         my %difftree = parse_difftree_raw_line($difftree_line);
9799                         next if !$difftree{'from_id'};
9800
9801                         my $file = $difftree{'file'} || $difftree{'to_file'};
9802
9803                         print "<li>" .
9804                               "[" .
9805                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
9806                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
9807                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
9808                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
9809                                       -title => "diff"}, 'D');
9810                         if ($have_blame) {
9811                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
9812                                                              file_name=>$file, hash_base=>$commit),
9813                                               -class => "blamelink",
9814                                               -title => "blame"}, 'B');
9815                         }
9816                         # if this is not a feed of a file history
9817                         if (!defined $file_name || $file_name ne $file) {
9818                                 print $cgi->a({-href => href(-full=>1, action=>"history",
9819                                                              file_name=>$file, hash=>$commit),
9820                                               -title => "history"}, 'H');
9821                         }
9822                         $file = esc_path($file);
9823                         print "] ".
9824                               "$file</li>\n";
9825                 }
9826                 if ($format eq 'rss') {
9827                         print "</ul>]]>\n" .
9828                               "</content:encoded>\n" .
9829                               "</item>\n";
9830                 } elsif ($format eq 'atom') {
9831                         print "</ul>\n</div>\n" .
9832                               "</content>\n" .
9833                               "</entry>\n";
9834                 }
9835         }
9836
9837         # end of feed
9838         if ($format eq 'rss') {
9839                 print "</channel>\n</rss>\n";
9840         } elsif ($format eq 'atom') {
9841                 print "</feed>\n";
9842         }
9843 }
9844
9845 sub git_rss {
9846         git_feed('rss');
9847 }
9848
9849 sub git_atom {
9850         git_feed('atom');
9851 }
9852
9853 sub git_opml {
9854         my @list = git_get_projects_list($project_filter, $strict_export);
9855         if (!@list) {
9856                 die_error(404, "No projects found");
9857         }
9858
9859         print $cgi->header(
9860                 -type => 'text/xml',
9861                 -charset => 'utf-8',
9862                 -content_disposition => 'inline; filename="opml.xml"');
9863
9864         my $title = esc_html($site_name);
9865         my $filter = " within subdirectory ";
9866         if (defined $project_filter) {
9867                 $filter .= esc_html($project_filter);
9868         } else {
9869                 $filter = "";
9870         }
9871         print <<XML;
9872 <?xml version="1.0" encoding="utf-8"?>
9873 <opml version="1.0">
9874 <head>
9875   <title>$title OPML Export$filter</title>
9876 </head>
9877 <body>
9878 <outline text="git RSS feeds">
9879 XML
9880
9881         foreach my $pr (@list) {
9882                 my %proj = %$pr;
9883                 my $head = git_get_head_hash($proj{'path'});
9884                 if (!defined $head) {
9885                         next;
9886                 }
9887                 $git_dir = "$projectroot/$proj{'path'}";
9888                 my %co = parse_commit($head);
9889                 if (!%co) {
9890                         next;
9891                 }
9892
9893                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
9894                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
9895                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
9896                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
9897         }
9898         print <<XML;
9899 </outline>
9900 </body>
9901 </opml>
9902 XML
9903 }