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 $strict_export = "++GITWEB_STRICT_EXPORT++";
 178
 179 # list of git base URLs used for URL to where fetch project from,
 180 # i.e. full URL is "$git_base_url/$project"
 181 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 182
 183 # URLs designated for pushing new changes, extended by the
 184 # project name (i.e. "$git_base_push_url[0]/$project")
 185 our @git_base_push_urls = ();
 186
 187 # https hint html inserted right after any https push URL (undef for none)
 188 our $https_hint_html = undef;
 189
 190 # default blob_plain mimetype and default charset for text/plain blob
 191 our $default_blob_plain_mimetype = 'application/octet-stream';
 192 our $default_text_plain_charset  = undef;
 193
 194 # file to use for guessing MIME types before trying /etc/mime.types
 195 # (relative to the current git repository)
 196 our $mimetypes_file = undef;
 197
 198 # assume this charset if line contains non-UTF-8 characters;
 199 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 200 # for which encoding all byte sequences are valid, for example
 201 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 202 # could be even 'utf-8' for the old behavior)
 203 our $fallback_encoding = 'latin1';
 204
 205 # rename detection options for git-diff and git-diff-tree
 206 # - default is '-M', with the cost proportional to
 207 #   (number of removed files) * (number of new files).
 208 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 209 #   (number of changed files + number of removed files) * (number of new files)
 210 # - even more costly is '-C', '--find-copies-harder' with cost
 211 #   (number of files in the original tree) * (number of new files)
 212 # - one might want to include '-B' option, e.g. '-B', '-M'
 213 our @diff_opts = ('-M'); # taken from git_commit
 214
 215 # cache directory (relative to $GIT_DIR) for project-specific html page caches.
 216 # the directory must exist and be writable by the process running gitweb.
 217 # additionally some actions must be selected for caching in %html_cache_actions
 218 # - default is 'htmlcache'
 219 our $html_cache_dir = 'htmlcache';
 220
 221 # which actions to cache in $html_cache_dir
 222 # if $html_cache_dir exists (relative to $GIT_DIR) and is writable by the
 223 # process running gitweb, then any actions selected here will have their output
 224 # cached and the cache file will be returned instead of regenerating the page
 225 # if it exists.  For this to be useful, an external process must create the
 226 # 'changed' file (if it does not already exist) in the $html_cache_dir whenever
 227 # the project information has been changed.  Alternatively it may create a
 228 # "$action.changed" file (if it does not exist) instead to limit the changes
 229 # to just "$action" instead of any action.  If 'changed' or "$action.changed"
 230 # exist, then the cached version will never be used for "$action" and a new
 231 # cache page will be regenerated (and the "changed" files removed as appropriate).
 232 #
 233 # Additionally if $projlist_cache_lifetime is > 0 AND the forks feature has been
 234 # enabled ('$feature{'forks'}{'default'} = [1];') then additionally an external
 235 # process must create the 'forkchange' file or update its timestamp if it already
 236 # exists whenever a fork is added to or removed from the project (as well as
 237 # create the 'changed' or "$action.changed" file).  Otherwise the "forks"
 238 # section on the summary page may remain out-of-date indefinately.
 239 #
 240 # - default is none
 241 #   currently only caching of the summary page is supported
 242 # - to enable caching of the summary page use:
 243 #   $html_cache_actions{'summary'} = 1;
 244 our %html_cache_actions = ();
 245
 246 # Disables features that would allow repository owners to inject script into
 247 # the gitweb domain.
 248 our $prevent_xss = 0;
 249
 250 # Path to a POSIX shell.  Needed to run $highlight_bin and a snapshot compressor.
 251 # Only used when highlight is enabled or snapshots with compressors are enabled.
 252 our $posix_shell_bin = "++POSIX_SHELL_BIN++";
 253
 254 # Path to the highlight executable to use (must be the one from
 255 # http://www.andre-simon.de due to assumptions about parameters and output).
 256 # Useful if highlight is not installed on your webserver's PATH.
 257 # [Default: highlight]
 258 our $highlight_bin = "++HIGHLIGHT_BIN++";
 259
 260 # Whether to include project list on the gitweb front page; 0 means yes,
 261 # 1 means no list but show tag cloud if enabled (all projects still need
 262 # to be scanned, unless the info is cached), 2 means no list and no tag cloud
 263 # (very fast)
 264 our $frontpage_no_project_list = 0;
 265
 266 # projects list cache for busy sites with many projects;
 267 # if you set this to non-zero, it will be used as the cached
 268 # index lifetime in minutes
 269 #
 270 # the cached list version is stored in $cache_dir/$cache_name and can
 271 # be tweaked by other scripts running with the same uid as gitweb -
 272 # use this ONLY at secure installations; only single gitweb project
 273 # root per system is supported, unless you tweak configuration!
 274 our $projlist_cache_lifetime = 0; # in minutes
 275 # FHS compliant $cache_dir would be "/var/cache/gitweb"
 276 our $cache_dir =
 277         (defined $ENV{'TMPDIR'} ? $ENV{'TMPDIR'} : '/tmp').'/gitweb';
 278 our $projlist_cache_name = 'gitweb.index.cache';
 279 our $cache_grpshared = 0;
 280
 281 # information about snapshot formats that gitweb is capable of serving
 282 our %known_snapshot_formats = (
 283         # name => {
 284         #       'display' => display name,
 285         #       'type' => mime type,
 286         #       'suffix' => filename suffix,
 287         #       'format' => --format for git-archive,
 288         #       'compressor' => [compressor command and arguments]
 289         #                       (array reference, optional)
 290         #       'disabled' => boolean (optional)}
 291         #
 292         'tgz' => {
 293                 'display' => 'tar.gz',
 294                 'type' => 'application/x-gzip',
 295                 'suffix' => '.tar.gz',
 296                 'format' => 'tar',
 297                 'compressor' => ['gzip', '-n']},
 298
 299         'tbz2' => {
 300                 'display' => 'tar.bz2',
 301                 'type' => 'application/x-bzip2',
 302                 'suffix' => '.tar.bz2',
 303                 'format' => 'tar',
 304                 'compressor' => ['bzip2']},
 305
 306         'txz' => {
 307                 'display' => 'tar.xz',
 308                 'type' => 'application/x-xz',
 309                 'suffix' => '.tar.xz',
 310                 'format' => 'tar',
 311                 'compressor' => ['xz'],
 312                 'disabled' => 1},
 313
 314         'zip' => {
 315                 'display' => 'zip',
 316                 'type' => 'application/x-zip',
 317                 'suffix' => '.zip',
 318                 'format' => 'zip'},
 319 );
 320
 321 # Aliases so we understand old gitweb.snapshot values in repository
 322 # configuration.
 323 our %known_snapshot_format_aliases = (
 324         'gzip'  => 'tgz',
 325         'bzip2' => 'tbz2',
 326         'xz'    => 'txz',
 327
 328         # backward compatibility: legacy gitweb config support
 329         'x-gzip' => undef, 'gz' => undef,
 330         'x-bzip2' => undef, 'bz2' => undef,
 331         'x-zip' => undef, '' => undef,
 332 );
 333
 334 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 335 # are changed, it may be appropriate to change these values too via
 336 # $GITWEB_CONFIG.
 337 our %avatar_size = (
 338         'default' => 16,
 339         'double'  => 32
 340 );
 341
 342 # Used to set the maximum load that we will still respond to gitweb queries.
 343 # If server load exceed this value then return "503 server busy" error.
 344 # If gitweb cannot determined server load, it is taken to be 0.
 345 # Leave it undefined (or set to 'undef') to turn off load checking.
 346 our $maxload = 300;
 347
 348 # configuration for 'highlight' (http://www.andre-simon.de/)
 349 # match by basename
 350 our %highlight_basename = (
 351         #'Program' => 'py',
 352         #'Library' => 'py',
 353         'SConstruct' => 'py', # SCons equivalent of Makefile
 354         'Makefile' => 'make',
 355         'makefile' => 'make',
 356         'GNUmakefile' => 'make',
 357         'BSDmakefile' => 'make',
 358 );
 359 # match by shebang regex
 360 our %highlight_shebang = (
 361         # Each entry has a key which is the syntax to use and
 362         # a value which is either a qr regex or an array of qr regexs to match
 363         # against the first 128 (less if the blob is shorter) BYTES of the blob.
 364         # We match /usr/bin/env items separately to require "/usr/bin/env" and
 365         # allow a limited subset of NAME=value items to appear.
 366         'awk'    => [ qr,^#!\s*/(?:\w+/)*(?:[gnm]?awk)(?:\s|$),mo,
 367                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:[gnm]?awk)(?:\s|$),mo ],
 368         'make'   => [ qr,^#!\s*/(?:\w+/)*(?:g?make)(?:\s|$),mo,
 369                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:g?make)(?:\s|$),mo ],
 370         'php'    => [ qr,^#!\s*/(?:\w+/)*(?:php)(?:\s|$),mo,
 371                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:php)(?:\s|$),mo ],
 372         'pl'     => [ qr,^#!\s*/(?:\w+/)*(?:perl)(?:\s|$),mo,
 373                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:perl)(?:\s|$),mo ],
 374         'py'     => [ qr,^#!\s*/(?:\w+/)*(?:python)(?:\s|$),mo,
 375                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:python)(?:\s|$),mo ],
 376         'sh'     => [ qr,^#!\s*/(?:\w+/)*(?:[bd]ash|t?csh|[akz]?sh)(?:\s|$),mo,
 377                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:[bd]ash|t?csh|[akz]?sh)(?:\s|$),mo ],
 378         'rb'     => [ qr,^#!\s*/(?:\w+/)*(?:perl)(?:\s|$),mo,
 379                       qr,^#!\s*/usr/bin/env\s+(?:\w+=\w*\s+)*(?:perl)(?:\s|$),mo ],
 380 );
 381 # match by extension
 382 our %highlight_ext = (
 383         # main extensions, defining name of syntax;
 384         # see files in /usr/share/highlight/langDefs/ directory
 385         (map { $_ => $_ } qw(
 386                 4gl a4c abnf abp ada agda ahk ampl amtrix applescript arc
 387                 arm as asm asp aspect ats au3 avenue awk bat bb bbcode bib
 388                 bms bnf boo c cb cfc chl clipper clojure clp cob cs css d
 389                 diff dot dylan e ebnf erl euphoria exp f90 flx for frink fs
 390                 go haskell hcl html httpd hx icl icn idl idlang ili
 391                 inc_luatex ini inp io iss j java js jsp lbn ldif lgt lhs
 392                 lisp lotos ls lsl lua ly make mel mercury mib miranda ml mo
 393                 mod2 mod3 mpl ms mssql n nas nbc nice nrx nsi nut nxc oberon
 394                 objc octave oorexx os oz pas php pike pl pl1 pov pro
 395                 progress ps ps1 psl pure py pyx q qmake qu r rb rebol rexx
 396                 rnc s sas sc scala scilab sh sma smalltalk sml sno spec spn
 397                 sql sybase tcl tcsh tex ttcn3 vala vb verilog vhd xml xpp y
 398                 yaiff znn)),
 399         # alternate extensions, see /etc/highlight/filetypes.conf
 400         (map { $_ => '4gl' } qw(informix)),
 401         (map { $_ => 'a4c' } qw(ascend)),
 402         (map { $_ => 'abp' } qw(abp4)),
 403         (map { $_ => 'ada' } qw(a adb ads gnad)),
 404         (map { $_ => 'ahk' } qw(autohotkey)),
 405         (map { $_ => 'ampl' } qw(dat run)),
 406         (map { $_ => 'amtrix' } qw(hnd s4 s4h s4t t4)),
 407         (map { $_ => 'as' } qw(actionscript)),
 408         (map { $_ => 'asm' } qw(29k 68s 68x a51 assembler x68 x86)),
 409         (map { $_ => 'asp' } qw(asa)),
 410         (map { $_ => 'aspect' } qw(was wud)),
 411         (map { $_ => 'ats' } qw(dats)),
 412         (map { $_ => 'au3' } qw(autoit)),
 413         (map { $_ => 'bat' } qw(cmd)),
 414         (map { $_ => 'bb' } qw(blitzbasic)),
 415         (map { $_ => 'bib' } qw(bibtex)),
 416         (map { $_ => 'c' } qw(c++ cc cpp cu cxx h hh hpp hxx)),
 417         (map { $_ => 'cb' } qw(clearbasic)),
 418         (map { $_ => 'cfc' } qw(cfm coldfusion)),
 419         (map { $_ => 'chl' } qw(chill)),
 420         (map { $_ => 'cob' } qw(cbl cobol)),
 421         (map { $_ => 'cs' } qw(csharp)),
 422         (map { $_ => 'diff' } qw(patch)),
 423         (map { $_ => 'dot' } qw(graphviz)),
 424         (map { $_ => 'e' } qw(eiffel se)),
 425         (map { $_ => 'erl' } qw(erlang hrl)),
 426         (map { $_ => 'euphoria' } qw(eu ew ex exu exw wxu)),
 427         (map { $_ => 'exp' } qw(express)),
 428         (map { $_ => 'f90' } qw(f95)),
 429         (map { $_ => 'flx' } qw(felix)),
 430         (map { $_ => 'for' } qw(f f77 ftn)),
 431         (map { $_ => 'fs' } qw(fsharp fsx)),
 432         (map { $_ => 'haskell' } qw(hs)),
 433         (map { $_ => 'html' } qw(htm xhtml)),
 434         (map { $_ => 'hx' } qw(haxe)),
 435         (map { $_ => 'icl' } qw(clean)),
 436         (map { $_ => 'icn' } qw(icon)),
 437         (map { $_ => 'ili' } qw(interlis)),
 438         (map { $_ => 'inp' } qw(fame)),
 439         (map { $_ => 'iss' } qw(innosetup)),
 440         (map { $_ => 'j' } qw(jasmin)),
 441         (map { $_ => 'java' } qw(groovy grv)),
 442         (map { $_ => 'lbn' } qw(luban)),
 443         (map { $_ => 'lgt' } qw(logtalk)),
 444         (map { $_ => 'lisp' } qw(cl clisp el lsp sbcl scom)),
 445         (map { $_ => 'ls' } qw(lotus)),
 446         (map { $_ => 'lsl' } qw(lindenscript)),
 447         (map { $_ => 'ly' } qw(lilypond)),
 448         (map { $_ => 'make' } qw(mak mk kmk)),
 449         (map { $_ => 'mel' } qw(maya)),
 450         (map { $_ => 'mib' } qw(smi snmp)),
 451         (map { $_ => 'ml' } qw(mli ocaml)),
 452         (map { $_ => 'mo' } qw(modelica)),
 453         (map { $_ => 'mod2' } qw(def mod)),
 454         (map { $_ => 'mod3' } qw(i3 m3)),
 455         (map { $_ => 'mpl' } qw(maple)),
 456         (map { $_ => 'n' } qw(nemerle)),
 457         (map { $_ => 'nas' } qw(nasal)),
 458         (map { $_ => 'nrx' } qw(netrexx)),
 459         (map { $_ => 'nsi' } qw(nsis)),
 460         (map { $_ => 'nut' } qw(squirrel)),
 461         (map { $_ => 'oberon' } qw(ooc)),
 462         (map { $_ => 'objc' } qw(M m mm)),
 463         (map { $_ => 'php' } qw(php3 php4 php5 php6)),
 464         (map { $_ => 'pike' } qw(pmod)),
 465         (map { $_ => 'pl' } qw(perl plex plx pm)),
 466         (map { $_ => 'pl1' } qw(bdy ff fp fpp rpp sf sp spb spe spp sps wf wp wpb wpp wps)),
 467         (map { $_ => 'progress' } qw(i p w)),
 468         (map { $_ => 'py' } qw(python)),
 469         (map { $_ => 'pyx' } qw(pyrex)),
 470         (map { $_ => 'rb' } qw(pp rjs ruby)),
 471         (map { $_ => 'rexx' } qw(rex rx the)),
 472         (map { $_ => 'sc' } qw(paradox)),
 473         (map { $_ => 'scilab' } qw(sce sci)),
 474         (map { $_ => 'sh' } qw(bash ebuild eclass ksh zsh)),
 475         (map { $_ => 'sma' } qw(small)),
 476         (map { $_ => 'smalltalk' } qw(gst sq st)),
 477         (map { $_ => 'sno' } qw(snobal)),
 478         (map { $_ => 'sybase' } qw(sp)),
 479         (map { $_ => 'tcl' } qw(itcl wish)),
 480         (map { $_ => 'tex' } qw(cls sty)),
 481         (map { $_ => 'vb' } qw(bas basic bi vbs)),
 482         (map { $_ => 'verilog' } qw(v)),
 483         (map { $_ => 'xml' } qw(dtd ecf ent hdr hub jnlp nrm plist resx sgm sgml svg tld vxml wml xsd xsl)),
 484         (map { $_ => 'y' } qw(bison)),
 485 );
 486
 487 # You define site-wide feature defaults here; override them with
 488 # $GITWEB_CONFIG as necessary.
 489 our %feature = (
 490         # feature => {
 491         #       'sub' => feature-sub (subroutine),
 492         #       'override' => allow-override (boolean),
 493         #       'default' => [ default options...] (array reference)}
 494         #
 495         # if feature is overridable (it means that allow-override has true value),
 496         # then feature-sub will be called with default options as parameters;
 497         # return value of feature-sub indicates if to enable specified feature
 498         #
 499         # if there is no 'sub' key (no feature-sub), then feature cannot be
 500         # overridden
 501         #
 502         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 503         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 504         # is enabled
 505
 506         # Enable the 'blame' blob view, showing the last commit that modified
 507         # each line in the file. This can be very CPU-intensive.
 508
 509         # To enable system wide have in $GITWEB_CONFIG
 510         # $feature{'blame'}{'default'} = [1];
 511         # To have project specific config enable override in $GITWEB_CONFIG
 512         # $feature{'blame'}{'override'} = 1;
 513         # and in project config gitweb.blame = 0|1;
 514         'blame' => {
 515                 'sub' => sub { feature_bool('blame', @_) },
 516                 'override' => 0,
 517                 'default' => [0]},
 518
 519         # Enable the 'incremental blame' blob view, which uses javascript to
 520         # incrementally show the revisions of lines as they are discovered
 521         # in the history. It is better for large histories, files and slow
 522         # servers, but requires javascript in the client and can slow down the
 523         # browser on large files.
 524
 525         # To enable system wide have in $GITWEB_CONFIG
 526         # $feature{'blame_incremental'}{'default'} = [1];
 527         # To have project specific config enable override in $GITWEB_CONFIG
 528         # $feature{'blame_incremental'}{'override'} = 1;
 529         # and in project config gitweb.blame_incremental = 0|1;
 530         'blame_incremental' => {
 531                 'sub' => sub { feature_bool('blame_incremental', @_) },
 532                 'override' => 0,
 533                 'default' => [0]},
 534
 535         # Enable the 'snapshot' link, providing a compressed archive of any
 536         # tree. This can potentially generate high traffic if you have large
 537         # project.
 538
 539         # Value is a list of formats defined in %known_snapshot_formats that
 540         # you wish to offer.
 541         # To disable system wide have in $GITWEB_CONFIG
 542         # $feature{'snapshot'}{'default'} = [];
 543         # To have project specific config enable override in $GITWEB_CONFIG
 544         # $feature{'snapshot'}{'override'} = 1;
 545         # and in project config, a comma-separated list of formats or "none"
 546         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 547         'snapshot' => {
 548                 'sub' => \&feature_snapshot,
 549                 'override' => 0,
 550                 'default' => ['tgz']},
 551
 552         # Enable text search, which will list the commits which match author,
 553         # committer or commit text to a given string.  Enabled by default.
 554         # Project specific override is not supported.
 555         #
 556         # Note that this controls all search features, which means that if
 557         # it is disabled, then 'grep' and 'pickaxe' search would also be
 558         # disabled.
 559         'search' => {
 560                 'override' => 0,
 561                 'default' => [1]},
 562
 563         # Enable grep search, which will list the files in currently selected
 564         # tree containing the given string. Enabled by default. This can be
 565         # potentially CPU-intensive, of course.
 566         # Note that you need to have 'search' feature enabled too.
 567
 568         # To enable system wide have in $GITWEB_CONFIG
 569         # $feature{'grep'}{'default'} = [1];
 570         # To have project specific config enable override in $GITWEB_CONFIG
 571         # $feature{'grep'}{'override'} = 1;
 572         # and in project config gitweb.grep = 0|1;
 573         'grep' => {
 574                 'sub' => sub { feature_bool('grep', @_) },
 575                 'override' => 0,
 576                 'default' => [1]},
 577
 578         # Enable the pickaxe search, which will list the commits that modified
 579         # a given string in a file. This can be practical and quite faster
 580         # alternative to 'blame', but still potentially CPU-intensive.
 581         # Note that you need to have 'search' feature enabled too.
 582
 583         # To enable system wide have in $GITWEB_CONFIG
 584         # $feature{'pickaxe'}{'default'} = [1];
 585         # To have project specific config enable override in $GITWEB_CONFIG
 586         # $feature{'pickaxe'}{'override'} = 1;
 587         # and in project config gitweb.pickaxe = 0|1;
 588         'pickaxe' => {
 589                 'sub' => sub { feature_bool('pickaxe', @_) },
 590                 'override' => 0,
 591                 'default' => [1]},
 592
 593         # Enable showing size of blobs in a 'tree' view, in a separate
 594         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 595
 596         # To disable system wide have in $GITWEB_CONFIG
 597         # $feature{'show-sizes'}{'default'} = [0];
 598         # To have project specific config enable override in $GITWEB_CONFIG
 599         # $feature{'show-sizes'}{'override'} = 1;
 600         # and in project config gitweb.showsizes = 0|1;
 601         'show-sizes' => {
 602                 'sub' => sub { feature_bool('showsizes', @_) },
 603                 'override' => 0,
 604                 'default' => [1]},
 605
 606         # Make gitweb use an alternative format of the URLs which can be
 607         # more readable and natural-looking: project name is embedded
 608         # directly in the path and the query string contains other
 609         # auxiliary information. All gitweb installations recognize
 610         # URL in either format; this configures in which formats gitweb
 611         # generates links.
 612
 613         # To enable system wide have in $GITWEB_CONFIG
 614         # $feature{'pathinfo'}{'default'} = [1];
 615         # Project specific override is not supported.
 616
 617         # Note that you will need to change the default location of CSS,
 618         # favicon, logo and possibly other files to an absolute URL. Also,
 619         # if gitweb.cgi serves as your indexfile, you will need to force
 620         # $my_uri to contain the script name in your $GITWEB_CONFIG (and you
 621         # will also likely want to set $home_link if you're setting $my_uri).
 622         'pathinfo' => {
 623                 'override' => 0,
 624                 'default' => [0]},
 625
 626         # Make gitweb consider projects in project root subdirectories
 627         # to be forks of existing projects. Given project $projname.git,
 628         # projects matching $projname/*.git will not be shown in the main
 629         # projects list, instead a '+' mark will be added to $projname
 630         # there and a 'forks' view will be enabled for the project, listing
 631         # all the forks. If project list is taken from a file, forks have
 632         # to be listed after the main project.
 633
 634         # To enable system wide have in $GITWEB_CONFIG
 635         # $feature{'forks'}{'default'} = [1];
 636         # Project specific override is not supported.
 637         'forks' => {
 638                 'override' => 0,
 639                 'default' => [0]},
 640
 641         # Insert custom links to the action bar of all project pages.
 642         # This enables you mainly to link to third-party scripts integrating
 643         # into gitweb; e.g. git-browser for graphical history representation
 644         # or custom web-based repository administration interface.
 645
 646         # The 'default' value consists of a list of triplets in the form
 647         # (label, link, position) where position is the label after which
 648         # to insert the link and link is a format string where %n expands
 649         # to the project name, %f to the project path within the filesystem,
 650         # %h to the current hash (h gitweb parameter) and %b to the current
 651         # hash base (hb gitweb parameter); %% expands to %.  %e expands to the
 652         # project name where all '+' characters have been replaced with '%2B'.
 653
 654         # To enable system wide have in $GITWEB_CONFIG e.g.
 655         # $feature{'actions'}{'default'} = [('graphiclog',
 656         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 657         # Project specific override is not supported.
 658         'actions' => {
 659                 'override' => 0,
 660                 'default' => []},
 661
 662         # Allow gitweb scan project content tags of project repository,
 663         # and display the popular Web 2.0-ish "tag cloud" near the projects
 664         # list.  Note that this is something COMPLETELY different from the
 665         # normal Git tags.
 666
 667         # gitweb by itself can show existing tags, but it does not handle
 668         # tagging itself; you need to do it externally, outside gitweb.
 669         # The format is described in git_get_project_ctags() subroutine.
 670         # You may want to install the HTML::TagCloud Perl module to get
 671         # a pretty tag cloud instead of just a list of tags.
 672
 673         # To enable system wide have in $GITWEB_CONFIG
 674         # $feature{'ctags'}{'default'} = [1];
 675         # Project specific override is not supported.
 676
 677         # A value of 0 means no ctags display or editing.  A value of
 678         # 1 enables ctags display but never editing.  A non-empty value
 679         # that is not a string of digits enables ctags display AND the
 680         # ability to add tags using a form that uses method POST and
 681         # an action value set to the configured 'ctags' value.
 682         'ctags' => {
 683                 'override' => 0,
 684                 'default' => [0]},
 685
 686         # The maximum number of patches in a patchset generated in patch
 687         # view. Set this to 0 or undef to disable patch view, or to a
 688         # negative number to remove any limit.
 689
 690         # To disable system wide have in $GITWEB_CONFIG
 691         # $feature{'patches'}{'default'} = [0];
 692         # To have project specific config enable override in $GITWEB_CONFIG
 693         # $feature{'patches'}{'override'} = 1;
 694         # and in project config gitweb.patches = 0|n;
 695         # where n is the maximum number of patches allowed in a patchset.
 696         'patches' => {
 697                 'sub' => \&feature_patches,
 698                 'override' => 0,
 699                 'default' => [16]},
 700
 701         # Avatar support. When this feature is enabled, views such as
 702         # shortlog or commit will display an avatar associated with
 703         # the email of the committer(s) and/or author(s).
 704
 705         # Currently available providers are gravatar and picon.
 706         # If an unknown provider is specified, the feature is disabled.
 707
 708         # Gravatar depends on Digest::MD5.
 709         # Picon currently relies on the indiana.edu database.
 710
 711         # To enable system wide have in $GITWEB_CONFIG
 712         # $feature{'avatar'}{'default'} = ['<provider>'];
 713         # where <provider> is either gravatar or picon.
 714         # To have project specific config enable override in $GITWEB_CONFIG
 715         # $feature{'avatar'}{'override'} = 1;
 716         # and in project config gitweb.avatar = <provider>;
 717         'avatar' => {
 718                 'sub' => \&feature_avatar,
 719                 'override' => 0,
 720                 'default' => ['']},
 721
 722         # Enable displaying how much time and how many git commands
 723         # it took to generate and display page.  Disabled by default.
 724         # Project specific override is not supported.
 725         'timed' => {
 726                 'override' => 0,
 727                 'default' => [0]},
 728
 729         # Enable turning some links into links to actions which require
 730         # JavaScript to run (like 'blame_incremental').  Not enabled by
 731         # default.  Project specific override is currently not supported.
 732         'javascript-actions' => {
 733                 'override' => 0,
 734                 'default' => [0]},
 735
 736         # Enable and configure ability to change common timezone for dates
 737         # in gitweb output via JavaScript.  Enabled by default.
 738         # Project specific override is not supported.
 739         'javascript-timezone' => {
 740                 'override' => 0,
 741                 'default' => [
 742                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 743                                      # or undef to turn off this feature
 744                         'gitweb_tz', # name of cookie where to store selected timezone
 745                         'datetime',  # CSS class used to mark up dates for manipulation
 746                 ]},
 747
 748         # Syntax highlighting support. This is based on Daniel Svensson's
 749         # and Sham Chukoury's work in gitweb-xmms2.git.
 750         # It requires the 'highlight' program present in $PATH,
 751         # and therefore is disabled by default.
 752
 753         # To enable system wide have in $GITWEB_CONFIG
 754         # $feature{'highlight'}{'default'} = [1];
 755
 756         'highlight' => {
 757                 'sub' => sub { feature_bool('highlight', @_) },
 758                 'override' => 0,
 759                 'default' => [0]},
 760
 761         # Enable displaying of remote heads in the heads list
 762
 763         # To enable system wide have in $GITWEB_CONFIG
 764         # $feature{'remote_heads'}{'default'} = [1];
 765         # To have project specific config enable override in $GITWEB_CONFIG
 766         # $feature{'remote_heads'}{'override'} = 1;
 767         # and in project config gitweb.remoteheads = 0|1;
 768         'remote_heads' => {
 769                 'sub' => sub { feature_bool('remote_heads', @_) },
 770                 'override' => 0,
 771                 'default' => [0]},
 772
 773         # Enable showing branches under other refs in addition to heads
 774
 775         # To set system wide extra branch refs have in $GITWEB_CONFIG
 776         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 777         # To have project specific config enable override in $GITWEB_CONFIG
 778         # $feature{'extra-branch-refs'}{'override'} = 1;
 779         # and in project config gitweb.extrabranchrefs = dirs of choice
 780         # Every directory is separated with whitespace.
 781
 782         'extra-branch-refs' => {
 783                 'sub' => \&feature_extra_branch_refs,
 784                 'override' => 0,
 785                 'default' => []},
 786 );
 787
 788 sub gitweb_get_feature {
 789         my ($name) = @_;
 790         return unless exists $feature{$name};
 791         my ($sub, $override, @defaults) = (
 792                 $feature{$name}{'sub'},
 793                 $feature{$name}{'override'},
 794                 @{$feature{$name}{'default'}});
 795         # project specific override is possible only if we have project
 796         our $git_dir; # global variable, declared later
 797         if (!$override || !defined $git_dir) {
 798                 return @defaults;
 799         }
 800         if (!defined $sub) {
 801                 warn "feature $name is not overridable";
 802                 return @defaults;
 803         }
 804         return $sub->(@defaults);
 805 }
 806
 807 # A wrapper to check if a given feature is enabled.
 808 # With this, you can say
 809 #
 810 #   my $bool_feat = gitweb_check_feature('bool_feat');
 811 #   gitweb_check_feature('bool_feat') or somecode;
 812 #
 813 # instead of
 814 #
 815 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 816 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 817 #
 818 sub gitweb_check_feature {
 819         return (gitweb_get_feature(@_))[0];
 820 }
 821
 822
 823 sub feature_bool {
 824         my $key = shift;
 825         my ($val) = git_get_project_config($key, '--bool');
 826
 827         if (!defined $val) {
 828                 return ($_[0]);
 829         } elsif ($val eq 'true') {
 830                 return (1);
 831         } elsif ($val eq 'false') {
 832                 return (0);
 833         }
 834 }
 835
 836 sub feature_snapshot {
 837         my (@fmts) = @_;
 838
 839         my ($val) = git_get_project_config('snapshot');
 840
 841         if ($val) {
 842                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 843         }
 844
 845         return @fmts;
 846 }
 847
 848 sub feature_patches {
 849         my @val = (git_get_project_config('patches', '--int'));
 850
 851         if (@val) {
 852                 return @val;
 853         }
 854
 855         return ($_[0]);
 856 }
 857
 858 sub feature_avatar {
 859         my @val = (git_get_project_config('avatar'));
 860
 861         return @val ? @val : @_;
 862 }
 863
 864 sub feature_extra_branch_refs {
 865         my (@branch_refs) = @_;
 866         my $values = git_get_project_config('extrabranchrefs');
 867
 868         if ($values) {
 869                 $values = config_to_multi ($values);
 870                 @branch_refs = ();
 871                 foreach my $value (@{$values}) {
 872                         push @branch_refs, split /\s+/, $value;
 873                 }
 874         }
 875
 876         return @branch_refs;
 877 }
 878
 879 # checking HEAD file with -e is fragile if the repository was
 880 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 881 # and then pruned.
 882 sub check_head_link {
 883         my ($dir) = @_;
 884         return 0 unless -d "$dir/objects" && -x _;
 885         return 0 unless -d "$dir/refs" && -x _;
 886         my $headfile = "$dir/HEAD";
 887         return -l $headfile ?
 888                 readlink($headfile) =~ /^refs\/heads\// : -f $headfile;
 889 }
 890
 891 sub check_export_ok {
 892         my ($dir) = @_;
 893         return (check_head_link($dir) &&
 894                 (!$export_ok || -e "$dir/$export_ok") &&
 895                 (!$export_auth_hook || $export_auth_hook->($dir)));
 896 }
 897
 898 # process alternate names for backward compatibility
 899 # filter out unsupported (unknown) snapshot formats
 900 sub filter_snapshot_fmts {
 901         my @fmts = @_;
 902
 903         @fmts = map {
 904                 exists $known_snapshot_format_aliases{$_} ?
 905                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 906         @fmts = grep {
 907                 exists $known_snapshot_formats{$_} &&
 908                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 909 }
 910
 911 sub filter_and_validate_refs {
 912         my @refs = @_;
 913         my %unique_refs = ();
 914
 915         foreach my $ref (@refs) {
 916                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 917                 # 'heads' are added implicitly in get_branch_refs().
 918                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 919         }
 920         return sort keys %unique_refs;
 921 }
 922
 923 # If it is set to code reference, it is code that it is to be run once per
 924 # request, allowing updating configurations that change with each request,
 925 # while running other code in config file only once.
 926 #
 927 # Otherwise, if it is false then gitweb would process config file only once;
 928 # if it is true then gitweb config would be run for each request.
 929 our $per_request_config = 1;
 930
 931 # If true and fileno STDIN is 0 and getsockname succeeds and getpeername fails
 932 # with ENOTCONN, then FCGI mode will be activated automatically in just the
 933 # same way as though the --fcgi option had been given instead.
 934 our $auto_fcgi = 0;
 935
 936 # read and parse gitweb config file given by its parameter.
 937 # returns true on success, false on recoverable error, allowing
 938 # to chain this subroutine, using first file that exists.
 939 # dies on errors during parsing config file, as it is unrecoverable.
 940 sub read_config_file {
 941         my $filename = shift;
 942         return unless defined $filename;
 943         # die if there are errors parsing config file
 944         if (-e $filename) {
 945                 do $filename;
 946                 die $@ if $@;
 947                 return 1;
 948         }
 949         return;
 950 }
 951
 952 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 953 sub evaluate_gitweb_config {
 954         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 955         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 956         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 957
 958         # Protect against duplications of file names, to not read config twice.
 959         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 960         # there possibility of duplication of filename there doesn't matter.
 961         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 962         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 963
 964         # Common system-wide settings for convenience.
 965         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 966         read_config_file($GITWEB_CONFIG_COMMON);
 967
 968         # Use first config file that exists.  This means use the per-instance
 969         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 970         read_config_file($GITWEB_CONFIG) and return;
 971         read_config_file($GITWEB_CONFIG_SYSTEM);
 972 }
 973
 974 our $encode_object;
 975
 976 sub evaluate_encoding {
 977         my $requested = $fallback_encoding || 'ISO-8859-1';
 978         my $obj = Encode::find_encoding($requested) or
 979                 die_error(400, "Requested fallback encoding not found");
 980         if ($obj->name eq 'iso-8859-1') {
 981                 # Use Windows-1252 instead as required by the HTML 5 standard
 982                 my $altobj = Encode::find_encoding('Windows-1252');
 983                 $obj = $altobj if $altobj;
 984         }
 985         $encode_object = $obj;
 986 }
 987
 988 sub evaluate_email_obfuscate {
 989         # email obfuscation
 990         our $email;
 991         if (!$email && eval { require HTML::Email::Obfuscate; 1 }) {
 992                 $email = HTML::Email::Obfuscate->new(lite => 1);
 993         }
 994 }
 995
 996 # Get loadavg of system, to compare against $maxload.
 997 # Currently it requires '/proc/loadavg' present to get loadavg;
 998 # if it is not present it returns 0, which means no load checking.
 999 sub get_loadavg {
1000         if( -e '/proc/loadavg' ){
1001                 open my $fd, '<', '/proc/loadavg'
1002                         or return 0;
1003                 my @load = split(/\s+/, scalar <$fd>);
1004                 close $fd;
1005
1006                 # The first three columns measure CPU and IO utilization of the last one,
1007                 # five, and 10 minute periods.  The fourth column shows the number of
1008                 # currently running processes and the total number of processes in the m/n
1009                 # format.  The last column displays the last process ID used.
1010                 return $load[0] || 0;
1011         }
1012         # additional checks for load average should go here for things that don't export
1013         # /proc/loadavg
1014
1015         return 0;
1016 }
1017
1018 # version of the core git binary
1019 our $git_version;
1020 sub evaluate_git_version {
1021         our $git_version = $version;
1022 }
1023
1024 sub check_loadavg {
1025         if (defined $maxload && get_loadavg() > $maxload) {
1026                 die_error(503, "The load average on the server is too high");
1027         }
1028 }
1029
1030 # ======================================================================
1031 # input validation and dispatch
1032
1033 # input parameters can be collected from a variety of sources (presently, CGI
1034 # and PATH_INFO), so we define an %input_params hash that collects them all
1035 # together during validation: this allows subsequent uses (e.g. href()) to be
1036 # agnostic of the parameter origin
1037
1038 our %input_params = ();
1039
1040 # input parameters are stored with the long parameter name as key. This will
1041 # also be used in the href subroutine to convert parameters to their CGI
1042 # equivalent, and since the href() usage is the most frequent one, we store
1043 # the name -> CGI key mapping here, instead of the reverse.
1044 #
1045 # XXX: Warning: If you touch this, check the search form for updating,
1046 # too.
1047
1048 our @cgi_param_mapping = (
1049         project => "p",
1050         action => "a",
1051         file_name => "f",
1052         file_parent => "fp",
1053         hash => "h",
1054         hash_parent => "hp",
1055         hash_base => "hb",
1056         hash_parent_base => "hpb",
1057         page => "pg",
1058         order => "o",
1059         searchtext => "s",
1060         searchtype => "st",
1061         snapshot_format => "sf",
1062         ctag_filter => 't',
1063         extra_options => "opt",
1064         search_use_regexp => "sr",
1065         ctag => "by_tag",
1066         diff_style => "ds",
1067         project_filter => "pf",
1068         # this must be last entry (for manipulation from JavaScript)
1069         javascript => "js"
1070 );
1071 our %cgi_param_mapping = @cgi_param_mapping;
1072
1073 # we will also need to know the possible actions, for validation
1074 our %actions = (
1075         "blame" => \&git_blame,
1076         "blame_incremental" => \&git_blame_incremental,
1077         "blame_data" => \&git_blame_data,
1078         "blobdiff" => \&git_blobdiff,
1079         "blobdiff_plain" => \&git_blobdiff_plain,
1080         "blob" => \&git_blob,
1081         "blob_plain" => \&git_blob_plain,
1082         "commitdiff" => \&git_commitdiff,
1083         "commitdiff_plain" => \&git_commitdiff_plain,
1084         "commit" => \&git_commit,
1085         "forks" => \&git_forks,
1086         "heads" => \&git_heads,
1087         "history" => \&git_history,
1088         "log" => \&git_log,
1089         "patch" => \&git_patch,
1090         "patches" => \&git_patches,
1091         "refs" => \&git_refs,
1092         "remotes" => \&git_remotes,
1093         "rss" => \&git_rss,
1094         "atom" => \&git_atom,
1095         "search" => \&git_search,
1096         "search_help" => \&git_search_help,
1097         "shortlog" => \&git_shortlog,
1098         "summary" => \&git_summary,
1099         "tag" => \&git_tag,
1100         "tags" => \&git_tags,
1101         "tree" => \&git_tree,
1102         "snapshot" => \&git_snapshot,
1103         "object" => \&git_object,
1104         # those below don't need $project
1105         "opml" => \&git_opml,
1106         "frontpage" => \&git_frontpage,
1107         "project_list" => \&git_project_list,
1108         "project_index" => \&git_project_index,
1109 );
1110
1111 # the only actions we will allow to be cached
1112 my %supported_cache_actions;
1113 BEGIN {%supported_cache_actions = map {( $_ => 1 )} qw(summary)}
1114
1115 # finally, we have the hash of allowed extra_options for the commands that
1116 # allow them
1117 our %allowed_options = (
1118         "--no-merges" => [ qw(rss atom log shortlog history) ],
1119 );
1120
1121 # fill %input_params with the CGI parameters. All values except for 'opt'
1122 # should be single values, but opt can be an array. We should probably
1123 # build an array of parameters that can be multi-valued, but since for the time
1124 # being it's only this one, we just single it out
1125 sub evaluate_query_params {
1126         our $cgi;
1127
1128         while (my ($name, $symbol) = each %cgi_param_mapping) {
1129                 if ($symbol eq 'opt') {
1130                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
1131                 } else {
1132                         $input_params{$name} = decode_utf8($cgi->param($symbol));
1133                 }
1134         }
1135
1136         # Backwards compatibility - by_tag= <=> t=
1137         if ($input_params{'ctag'}) {
1138                 $input_params{'ctag_filter'} = $input_params{'ctag'};
1139         }
1140 }
1141
1142 # now read PATH_INFO and update the parameter list for missing parameters
1143 sub evaluate_path_info {
1144         return if defined $input_params{'project'};
1145         return if !$path_info;
1146         $path_info =~ s,^/+,,;
1147         return if !$path_info;
1148
1149         # find which part of PATH_INFO is project
1150         my $project = $path_info;
1151         $project =~ s,/+$,,;
1152         while ($project && !check_head_link("$projectroot/$project")) {
1153                 $project =~ s,/*[^/]*$,,;
1154         }
1155         return unless $project;
1156         $input_params{'project'} = $project;
1157
1158         # do not change any parameters if an action is given using the query string
1159         return if $input_params{'action'};
1160         $path_info =~ s,^\Q$project\E/*,,;
1161
1162         # next, check if we have an action
1163         my $action = $path_info;
1164         $action =~ s,/.*$,,;
1165         if (exists $actions{$action}) {
1166                 $path_info =~ s,^$action/*,,;
1167                 $input_params{'action'} = $action;
1168         }
1169
1170         # list of actions that want hash_base instead of hash, but can have no
1171         # pathname (f) parameter
1172         my @wants_base = (
1173                 'tree',
1174                 'history',
1175         );
1176
1177         # we want to catch, among others
1178         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
1179         my ($parentrefname, $parentpathname, $refname, $pathname) =
1180                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
1181
1182         # first, analyze the 'current' part
1183         if (defined $pathname) {
1184                 # we got "branch:filename" or "branch:dir/"
1185                 # we could use git_get_type(branch:pathname), but:
1186                 # - it needs $git_dir
1187                 # - it does a git() call
1188                 # - the convention of terminating directories with a slash
1189                 #   makes it superfluous
1190                 # - embedding the action in the PATH_INFO would make it even
1191                 #   more superfluous
1192                 $pathname =~ s,^/+,,;
1193                 if (!$pathname || substr($pathname, -1) eq "/") {
1194                         $input_params{'action'} ||= "tree";
1195                         $pathname =~ s,/$,,;
1196                 } else {
1197                         # the default action depends on whether we had parent info
1198                         # or not
1199                         if ($parentrefname) {
1200                                 $input_params{'action'} ||= "blobdiff_plain";
1201                         } else {
1202                                 $input_params{'action'} ||= "blob_plain";
1203                         }
1204                 }
1205                 $input_params{'hash_base'} ||= $refname;
1206                 $input_params{'file_name'} ||= $pathname;
1207         } elsif (defined $refname) {
1208                 # we got "branch". In this case we have to choose if we have to
1209                 # set hash or hash_base.
1210                 #
1211                 # Most of the actions without a pathname only want hash to be
1212                 # set, except for the ones specified in @wants_base that want
1213                 # hash_base instead. It should also be noted that hand-crafted
1214                 # links having 'history' as an action and no pathname or hash
1215                 # set will fail, but that happens regardless of PATH_INFO.
1216                 if (defined $parentrefname) {
1217                         # if there is parent let the default be 'shortlog' action
1218                         # (for http://git.example.com/repo.git/A..B links); if there
1219                         # is no parent, dispatch will detect type of object and set
1220                         # action appropriately if required (if action is not set)
1221                         $input_params{'action'} ||= "shortlog";
1222                 }
1223                 if ($input_params{'action'} &&
1224                     grep { $_ eq $input_params{'action'} } @wants_base) {
1225                         $input_params{'hash_base'} ||= $refname;
1226                 } else {
1227                         $input_params{'hash'} ||= $refname;
1228                 }
1229         }
1230
1231         # next, handle the 'parent' part, if present
1232         if (defined $parentrefname) {
1233                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1234                 # someproject/blobdiff/oldrev..newrev:/filename
1235                 if ($parentpathname) {
1236                         $parentpathname =~ s,^/+,,;
1237                         $parentpathname =~ s,/$,,;
1238                         $input_params{'file_parent'} ||= $parentpathname;
1239                 } else {
1240                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1241                 }
1242                 # we assume that hash_parent_base is wanted if a path was specified,
1243                 # or if the action wants hash_base instead of hash
1244                 if (defined $input_params{'file_parent'} ||
1245                         grep { $_ eq $input_params{'action'} } @wants_base) {
1246                         $input_params{'hash_parent_base'} ||= $parentrefname;
1247                 } else {
1248                         $input_params{'hash_parent'} ||= $parentrefname;
1249                 }
1250         }
1251
1252         # for the snapshot action, we allow URLs in the form
1253         # $project/snapshot/$hash.ext
1254         # where .ext determines the snapshot and gets removed from the
1255         # passed $refname to provide the $hash.
1256         #
1257         # To be able to tell that $refname includes the format extension, we
1258         # require the following two conditions to be satisfied:
1259         # - the hash input parameter MUST have been set from the $refname part
1260         #   of the URL (i.e. they must be equal)
1261         # - the snapshot format MUST NOT have been defined already (e.g. from
1262         #   CGI parameter sf)
1263         # It's also useless to try any matching unless $refname has a dot,
1264         # so we check for that too
1265         if (defined $input_params{'action'} &&
1266                 $input_params{'action'} eq 'snapshot' &&
1267                 defined $refname && index($refname, '.') != -1 &&
1268                 $refname eq $input_params{'hash'} &&
1269                 !defined $input_params{'snapshot_format'}) {
1270                 # We loop over the known snapshot formats, checking for
1271                 # extensions. Allowed extensions are both the defined suffix
1272                 # (which includes the initial dot already) and the snapshot
1273                 # format key itself, with a prepended dot
1274                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1275                         my $hash = $refname;
1276                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1277                                 next;
1278                         }
1279                         my $sfx = $1;
1280                         # a valid suffix was found, so set the snapshot format
1281                         # and reset the hash parameter
1282                         $input_params{'snapshot_format'} = $fmt;
1283                         $input_params{'hash'} = $hash;
1284                         # we also set the format suffix to the one requested
1285                         # in the URL: this way a request for e.g. .tgz returns
1286                         # a .tgz instead of a .tar.gz
1287                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1288                         last;
1289                 }
1290         }
1291 }
1292
1293 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1294      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1295      $searchtext, $search_regexp, $project_filter);
1296 sub evaluate_and_validate_params {
1297         our $action = $input_params{'action'};
1298         if (defined $action) {
1299                 if (!is_valid_action($action)) {
1300                         die_error(400, "Invalid action parameter");
1301                 }
1302         }
1303
1304         # parameters which are pathnames
1305         our $project = $input_params{'project'};
1306         if (defined $project) {
1307                 if (!is_valid_project($project)) {
1308                         undef $project;
1309                         die_error(404, "No such project");
1310                 }
1311         }
1312
1313         our $project_filter = $input_params{'project_filter'};
1314         if (defined $project_filter) {
1315                 if (!is_valid_pathname($project_filter)) {
1316                         die_error(404, "Invalid project_filter parameter");
1317                 }
1318         }
1319
1320         our $file_name = $input_params{'file_name'};
1321         if (defined $file_name) {
1322                 if (!is_valid_pathname($file_name)) {
1323                         die_error(400, "Invalid file parameter");
1324                 }
1325         }
1326
1327         our $file_parent = $input_params{'file_parent'};
1328         if (defined $file_parent) {
1329                 if (!is_valid_pathname($file_parent)) {
1330                         die_error(400, "Invalid file parent parameter");
1331                 }
1332         }
1333
1334         # parameters which are refnames
1335         our $hash = $input_params{'hash'};
1336         if (defined $hash) {
1337                 if (!is_valid_refname($hash)) {
1338                         die_error(400, "Invalid hash parameter");
1339                 }
1340         }
1341
1342         our $hash_parent = $input_params{'hash_parent'};
1343         if (defined $hash_parent) {
1344                 if (!is_valid_refname($hash_parent)) {
1345                         die_error(400, "Invalid hash parent parameter");
1346                 }
1347         }
1348
1349         our $hash_base = $input_params{'hash_base'};
1350         if (defined $hash_base) {
1351                 if (!is_valid_refname($hash_base)) {
1352                         die_error(400, "Invalid hash base parameter");
1353                 }
1354         }
1355
1356         our @extra_options = @{$input_params{'extra_options'}};
1357         # @extra_options is always defined, since it can only be (currently) set from
1358         # CGI, and $cgi->param() returns the empty array in array context if the param
1359         # is not set
1360         foreach my $opt (@extra_options) {
1361                 if (not exists $allowed_options{$opt}) {
1362                         die_error(400, "Invalid option parameter");
1363                 }
1364                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1365                         die_error(400, "Invalid option parameter for this action");
1366                 }
1367         }
1368
1369         our $hash_parent_base = $input_params{'hash_parent_base'};
1370         if (defined $hash_parent_base) {
1371                 if (!is_valid_refname($hash_parent_base)) {
1372                         die_error(400, "Invalid hash parent base parameter");
1373                 }
1374         }
1375
1376         # other parameters
1377         our $page = $input_params{'page'};
1378         if (defined $page) {
1379                 if ($page =~ m/[^0-9]/) {
1380                         die_error(400, "Invalid page parameter");
1381                 }
1382         }
1383
1384         our $searchtype = $input_params{'searchtype'};
1385         if (defined $searchtype) {
1386                 if ($searchtype =~ m/[^a-z]/) {
1387                         die_error(400, "Invalid searchtype parameter");
1388                 }
1389         }
1390
1391         our $search_use_regexp = $input_params{'search_use_regexp'};
1392
1393         our $searchtext = $input_params{'searchtext'};
1394         our $search_regexp = undef;
1395         if (defined $searchtext) {
1396                 if (length($searchtext) < 2) {
1397                         die_error(403, "At least two characters are required for search parameter");
1398                 }
1399                 if ($search_use_regexp) {
1400                         $search_regexp = $searchtext;
1401                         if (!eval { qr/$search_regexp/; 1; }) {
1402                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1403                                 die_error(400, "Invalid search regexp '$search_regexp'",
1404                                           esc_html($error));
1405                         }
1406                 } else {
1407                         $search_regexp = quotemeta $searchtext;
1408                 }
1409         }
1410 }
1411
1412 # path to the current git repository
1413 our $git_dir;
1414 sub evaluate_git_dir {
1415         our $git_dir = $project ? "$projectroot/$project" : undef;
1416 }
1417
1418 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1419 sub configure_gitweb_features {
1420         # list of supported snapshot formats
1421         our @snapshot_fmts = gitweb_get_feature('snapshot');
1422         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1423
1424         # check that the avatar feature is set to a known provider name,
1425         # and for each provider check if the dependencies are satisfied.
1426         # if the provider name is invalid or the dependencies are not met,
1427         # reset $git_avatar to the empty string.
1428         our ($git_avatar) = gitweb_get_feature('avatar');
1429         if ($git_avatar eq 'gravatar') {
1430                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1431         } elsif ($git_avatar eq 'picon') {
1432                 # no dependencies
1433         } else {
1434                 $git_avatar = '';
1435         }
1436
1437         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1438         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1439 }
1440
1441 sub get_branch_refs {
1442         return ('heads', @extra_branch_refs);
1443 }
1444
1445 # custom error handler: 'die <message>' is Internal Server Error
1446 sub handle_errors_html {
1447         my $msg = shift; # it is already HTML escaped
1448
1449         # to avoid infinite loop where error occurs in die_error,
1450         # change handler to default handler, disabling handle_errors_html
1451         set_message("Error occurred when inside die_error:\n$msg");
1452
1453         # you cannot jump out of die_error when called as error handler;
1454         # the subroutine set via CGI::Carp::set_message is called _after_
1455         # HTTP headers are already written, so it cannot write them itself
1456         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1457 }
1458 set_message(\&handle_errors_html);
1459
1460 our $shown_stale_message = 0;
1461 our $cache_dump = undef;
1462 our $cache_dump_mtime = undef;
1463
1464 # dispatch
1465 my $cache_mode_active;
1466 sub dispatch {
1467         $shown_stale_message = 0;
1468         if (!defined $action) {
1469                 if (defined $hash) {
1470                         $action = git_get_type($hash);
1471                         $action or die_error(404, "Object does not exist");
1472                 } elsif (defined $hash_base && defined $file_name) {
1473                         $action = git_get_type("$hash_base:$file_name");
1474                         $action or die_error(404, "File or directory does not exist");
1475                 } elsif (defined $project) {
1476                         $action = 'summary';
1477                 } else {
1478                         $action = 'frontpage';
1479                 }
1480         }
1481         if (!defined($actions{$action})) {
1482                 die_error(400, "Unknown action");
1483         }
1484         if ($action !~ m/^(?:opml|frontpage|project_list|project_index)$/ &&
1485             !$project) {
1486                 die_error(400, "Project needed");
1487         }
1488
1489         my $cached_page = $supported_cache_actions{$action}
1490                 ? cached_action_page($action)
1491                 : undef;
1492         goto DUMPCACHE if $cached_page;
1493         local *SAVEOUT = *STDOUT;
1494         $cache_mode_active = $supported_cache_actions{$action}
1495                 ? cached_action_start($action)
1496                 : undef;
1497
1498         configure_gitweb_features();
1499         $actions{$action}->();
1500
1501         return unless $cache_mode_active;
1502
1503         $cached_page = cached_action_finish($action);
1504         *STDOUT = *SAVEOUT;
1505
1506         DUMPCACHE:
1507
1508         $cache_mode_active = 0;
1509         # Avoid any extra unwanted encoding steps as $cached_page is raw bytes
1510         binmode STDOUT, ':raw';
1511         our $fcgi_raw_mode = 1;
1512         print expand_gitweb_pi($cached_page, time);
1513         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
1514         $fcgi_raw_mode = 0;
1515 }
1516
1517 sub reset_timer {
1518         our $t0 = [ gettimeofday() ]
1519                 if defined $t0;
1520         our $number_of_git_cmds = 0;
1521 }
1522
1523 our $first_request = 1;
1524 our $evaluate_uri_force = undef;
1525 sub run_request {
1526         reset_timer();
1527
1528         # do not reuse stale config or project list from prior FCGI request
1529         our $config_file = '';
1530         our $gitweb_project_owner = undef;
1531
1532         # Only allow GET and HEAD methods
1533         if (!$ENV{'REQUEST_METHOD'} || ($ENV{'REQUEST_METHOD'} ne 'GET' && $ENV{'REQUEST_METHOD'} ne 'HEAD')) {
1534                 print <<EOT;
1535 Status: 405 Method Not Allowed
1536 Content-Type: text/plain
1537 Allow: GET,HEAD
1538
1539 405 Method Not Allowed
1540 EOT
1541                 return;
1542         }
1543
1544         evaluate_uri();
1545         &$evaluate_uri_force() if $evaluate_uri_force;
1546         if ($per_request_config) {
1547                 if (ref($per_request_config) eq 'CODE') {
1548                         $per_request_config->();
1549                 } elsif (!$first_request) {
1550                         evaluate_gitweb_config();
1551                         evaluate_email_obfuscate();
1552                 }
1553         }
1554         check_loadavg();
1555
1556         # $projectroot and $projects_list might be set in gitweb config file
1557         $projects_list ||= $projectroot;
1558
1559         evaluate_query_params();
1560         evaluate_path_info();
1561         evaluate_and_validate_params();
1562         evaluate_git_dir();
1563
1564         dispatch();
1565 }
1566
1567 our $is_last_request = sub { 1 };
1568 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1569 our $CGI = 'CGI';
1570 our $cgi;
1571 our $fcgi_mode = 0;
1572 our $fcgi_nproc_active = 0;
1573 our $fcgi_raw_mode = 0;
1574 sub is_fcgi {
1575         use Errno;
1576         my $stdinfno = fileno STDIN;
1577         return 0 unless defined $stdinfno && $stdinfno == 0;
1578         return 0 unless getsockname STDIN;
1579         return 0 if getpeername STDIN;
1580         return $!{ENOTCONN}?1:0;
1581 }
1582 sub configure_as_fcgi {
1583         return if $fcgi_mode;
1584
1585         require FCGI;
1586         require CGI::Fast;
1587
1588         # We have gone to great effort to make sure that all incoming data has
1589         # been converted from whatever format it was in into UTF-8.  We have
1590         # even taken care to make sure the output handle is in ':utf8' mode.
1591         # Now along comes FCGI and blows it with:
1592         #
1593         #     Use of wide characters in FCGI::Stream::PRINT is deprecated
1594         #      and will stop wprking[sic] in a future version of FCGI
1595         #
1596         # To fix this we replace FCGI::Stream::PRINT with our own routine that
1597         # first encodes everything and then calls the original routine, but
1598         # not if $fcgi_raw_mode is true (then we just call the original routine).
1599         #
1600         # Note that we could do this by using utf8::is_utf8 to check instead
1601         # of having a $fcgi_raw_mode global, but that would be slower to run
1602         # the test on each element and much slower than skipping the conversion
1603         # entirely when we know we're outputting raw bytes.
1604         my $orig = \&FCGI::Stream::PRINT;
1605         undef *FCGI::Stream::PRINT;
1606         *FCGI::Stream::PRINT = sub {
1607                 @_ = (shift, map {my $x=$_; utf8::encode($x); $x} @_)
1608                         unless $fcgi_raw_mode;
1609                 goto $orig;
1610         };
1611
1612         our $CGI = 'CGI::Fast';
1613
1614         $fcgi_mode = 1;
1615         $first_request = 0;
1616         my $request_number = 0;
1617         # let each child service 100 requests
1618         our $is_last_request = sub { ++$request_number > 100 };
1619 }
1620 sub evaluate_argv {
1621         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1622         configure_as_fcgi()
1623                 if $script_name =~ /\.fcgi$/ || ($auto_fcgi && is_fcgi());
1624
1625         my $nproc_sub = sub {
1626                 my ($arg, $val) = @_;
1627                 return unless eval { require FCGI::ProcManager; 1; };
1628                 $fcgi_nproc_active = 1;
1629                 my $proc_manager = FCGI::ProcManager->new({
1630                         n_processes => $val,
1631                 });
1632                 our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1633                 our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1634                 our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1635         };
1636         if (@ARGV) {
1637                 require Getopt::Long;
1638                 Getopt::Long::GetOptions(
1639                         'fastcgi|fcgi|f' => \&configure_as_fcgi,
1640                         'nproc|n=i' => $nproc_sub,
1641                 );
1642         };
1643         if (!$fcgi_nproc_active && defined $ENV{'GITWEB_FCGI_NPROC'} && $ENV{'GITWEB_FCGI_NPROC'} =~ /^\d+$/) {
1644                 &$nproc_sub('nproc', $ENV{'GITWEB_FCGI_NPROC'});
1645         }
1646 }
1647
1648 sub run {
1649         evaluate_gitweb_config();
1650         evaluate_encoding();
1651         evaluate_email_obfuscate();
1652         evaluate_git_version();
1653         my ($mu, $hl, $subroutine) = ($my_uri, $home_link, '');
1654         $subroutine .= '$my_uri = $mu;' if defined $my_uri && $my_uri ne '';
1655         $subroutine .= '$home_link = $hl;' if defined $home_link && $home_link ne '';
1656         $evaluate_uri_force = eval "sub {$subroutine}" if $subroutine;
1657         $first_request = 1;
1658         evaluate_argv();
1659
1660         $pre_listen_hook->()
1661                 if $pre_listen_hook;
1662
1663  REQUEST:
1664         while ($cgi = $CGI->new()) {
1665                 $pre_dispatch_hook->()
1666                         if $pre_dispatch_hook;
1667
1668                 run_request();
1669
1670                 $post_dispatch_hook->()
1671                         if $post_dispatch_hook;
1672                 $first_request = 0;
1673
1674                 last REQUEST if ($is_last_request->());
1675         }
1676
1677  DONE_GITWEB:
1678         1;
1679 }
1680
1681 run();
1682
1683 if (defined caller) {
1684         # wrapped in a subroutine processing requests,
1685         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1686         return;
1687 } else {
1688         # pure CGI script, serving single request
1689         exit;
1690 }
1691
1692 ## ======================================================================
1693 ## action links
1694
1695 # possible values of extra options
1696 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1697 # -replay => 1      - start from a current view (replay with modifications)
1698 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1699 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1700 sub href {
1701         my %params = @_;
1702         # default is to use -absolute url() i.e. $my_uri
1703         my $href = $params{-full} ? $my_url : $my_uri;
1704
1705         # implicit -replay, must be first of implicit params
1706         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1707
1708         $params{'project'} = $project unless exists $params{'project'};
1709
1710         if ($params{-replay}) {
1711                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1712                         if (!exists $params{$name}) {
1713                                 $params{$name} = $input_params{$name};
1714                         }
1715                 }
1716         }
1717
1718         my $use_pathinfo = gitweb_check_feature('pathinfo');
1719         if (defined $params{'project'} &&
1720             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1721                 # try to put as many parameters as possible in PATH_INFO:
1722                 #   - project name
1723                 #   - action
1724                 #   - hash_parent or hash_parent_base:/file_parent
1725                 #   - hash or hash_base:/filename
1726                 #   - the snapshot_format as an appropriate suffix
1727
1728                 # When the script is the root DirectoryIndex for the domain,
1729                 # $href here would be something like http://gitweb.example.com/
1730                 # Thus, we strip any trailing / from $href, to spare us double
1731                 # slashes in the final URL
1732                 $href =~ s,/$,,;
1733
1734                 # Then add the project name, if present
1735                 $href .= "/".esc_path_info($params{'project'});
1736                 delete $params{'project'};
1737
1738                 # since we destructively absorb parameters, we keep this
1739                 # boolean that remembers if we're handling a snapshot
1740                 my $is_snapshot = $params{'action'} eq 'snapshot';
1741
1742                 # Summary just uses the project path URL, any other action is
1743                 # added to the URL
1744                 if (defined $params{'action'}) {
1745                         $href .= "/".esc_path_info($params{'action'})
1746                                 unless $params{'action'} eq 'summary';
1747                         delete $params{'action'};
1748                 }
1749
1750                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1751                 # stripping nonexistent or useless pieces
1752                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1753                         || $params{'hash_parent'} || $params{'hash'});
1754                 if (defined $params{'hash_base'}) {
1755                         if (defined $params{'hash_parent_base'}) {
1756                                 $href .= esc_path_info($params{'hash_parent_base'});
1757                                 # skip the file_parent if it's the same as the file_name
1758                                 if (defined $params{'file_parent'}) {
1759                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1760                                                 delete $params{'file_parent'};
1761                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1762                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1763                                                 delete $params{'file_parent'};
1764                                         }
1765                                 }
1766                                 $href .= "..";
1767                                 delete $params{'hash_parent'};
1768                                 delete $params{'hash_parent_base'};
1769                         } elsif (defined $params{'hash_parent'}) {
1770                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1771                                 delete $params{'hash_parent'};
1772                         }
1773
1774                         $href .= esc_path_info($params{'hash_base'});
1775                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1776                                 $href .= ":/".esc_path_info($params{'file_name'});
1777                                 delete $params{'file_name'};
1778                         }
1779                         delete $params{'hash'};
1780                         delete $params{'hash_base'};
1781                 } elsif (defined $params{'hash'}) {
1782                         $href .= esc_path_info($params{'hash'});
1783                         delete $params{'hash'};
1784                 }
1785
1786                 # If the action was a snapshot, we can absorb the
1787                 # snapshot_format parameter too
1788                 if ($is_snapshot) {
1789                         my $fmt = $params{'snapshot_format'};
1790                         # snapshot_format should always be defined when href()
1791                         # is called, but just in case some code forgets, we
1792                         # fall back to the default
1793                         $fmt ||= $snapshot_fmts[0];
1794                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1795                         delete $params{'snapshot_format'};
1796                 }
1797         }
1798
1799         # now encode the parameters explicitly
1800         my @result = ();
1801         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1802                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1803                 if (defined $params{$name}) {
1804                         if (ref($params{$name}) eq "ARRAY") {
1805                                 foreach my $par (@{$params{$name}}) {
1806                                         push @result, $symbol . "=" . esc_param($par);
1807                                 }
1808                         } else {
1809                                 push @result, $symbol . "=" . esc_param($params{$name});
1810                         }
1811                 }
1812         }
1813         $href .= "?" . join(';', @result) if scalar @result;
1814
1815         # final transformation: trailing spaces must be escaped (URI-encoded)
1816         $href =~ s/(\s+)$/CGI::escape($1)/e;
1817
1818         if ($params{-anchor}) {
1819                 $href .= "#".esc_param($params{-anchor});
1820         }
1821
1822         return $href;
1823 }
1824
1825
1826 ## ======================================================================
1827 ## validation, quoting/unquoting and escaping
1828
1829 sub is_valid_action {
1830         my $input = shift;
1831         return undef unless exists $actions{$input};
1832         return 1;
1833 }
1834
1835 sub is_valid_project {
1836         my $input = shift;
1837
1838         return unless defined $input;
1839         if (!is_valid_pathname($input) ||
1840                 !(-d "$projectroot/$input") ||
1841                 !check_export_ok("$projectroot/$input") ||
1842                 ($strict_export && !project_in_list($input))) {
1843                 return undef;
1844         } else {
1845                 return 1;
1846         }
1847 }
1848
1849 sub is_valid_pathname {
1850         my $input = shift;
1851
1852         return undef unless defined $input;
1853         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1854         # at the beginning, at the end, and between slashes.
1855         # also this catches doubled slashes
1856         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1857                 return undef;
1858         }
1859         # no null characters
1860         if ($input =~ m!\0!) {
1861                 return undef;
1862         }
1863         return 1;
1864 }
1865
1866 sub is_valid_ref_format {
1867         my $input = shift;
1868
1869         return undef unless defined $input;
1870         # restrictions on ref name according to git-check-ref-format
1871         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1872                 return undef;
1873         }
1874         return 1;
1875 }
1876
1877 sub is_valid_refname {
1878         my $input = shift;
1879
1880         return undef unless defined $input;
1881         # textual hashes are O.K.
1882         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1883                 return 1;
1884         }
1885         # it must be correct pathname
1886         is_valid_pathname($input) or return undef;
1887         # check git-check-ref-format restrictions
1888         is_valid_ref_format($input) or return undef;
1889         return 1;
1890 }
1891
1892 # decode sequences of octets in utf8 into Perl's internal form,
1893 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1894 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1895 sub to_utf8 {
1896         my $str = shift;
1897         return undef unless defined $str;
1898
1899         if (utf8::is_utf8($str) || utf8::decode($str)) {
1900                 return $str;
1901         } else {
1902                 return $encode_object->decode($str, Encode::FB_DEFAULT);
1903         }
1904 }
1905
1906 # quote unsafe chars, but keep the slash, even when it's not
1907 # correct, but quoted slashes look too horrible in bookmarks
1908 sub esc_param {
1909         my $str = shift;
1910         return undef unless defined $str;
1911         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1912         $str =~ s/ /\+/g;
1913         return $str;
1914 }
1915
1916 # the quoting rules for path_info fragment are slightly different
1917 sub esc_path_info {
1918         my $str = shift;
1919         return undef unless defined $str;
1920
1921         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1922         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1923
1924         return $str;
1925 }
1926
1927 # quote unsafe chars in whole URL, so some characters cannot be quoted
1928 sub esc_url {
1929         my $str = shift;
1930         return undef unless defined $str;
1931         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1932         $str =~ s/ /\+/g;
1933         return $str;
1934 }
1935
1936 # quote unsafe characters in HTML attributes
1937 sub esc_attr {
1938
1939         # for XHTML conformance escaping '"' to '&quot;' is not enough
1940         return esc_html(@_);
1941 }
1942
1943 # replace invalid utf8 character with SUBSTITUTION sequence
1944 sub esc_html {
1945         my $str = shift;
1946         my %opts = @_;
1947
1948         return undef unless defined $str;
1949
1950         $str = to_utf8($str);
1951         $str = $cgi->escapeHTML($str);
1952         if ($opts{'-nbsp'}) {
1953                 $str =~ s/ /&#160;/g;
1954         }
1955         use bytes;
1956         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1957         return $str;
1958 }
1959
1960 # quote control characters and escape filename to HTML
1961 sub esc_path {
1962         my $str = shift;
1963         my %opts = @_;
1964
1965         return undef unless defined $str;
1966
1967         $str = to_utf8($str);
1968         $str = $cgi->escapeHTML($str);
1969         if ($opts{'-nbsp'}) {
1970                 $str =~ s/ /&#160;/g;
1971         }
1972         use bytes;
1973         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1974         return $str;
1975 }
1976
1977 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1978 sub sanitize {
1979         my $str = shift;
1980
1981         return undef unless defined $str;
1982
1983         $str = to_utf8($str);
1984         use bytes;
1985         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1986         return $str;
1987 }
1988
1989 # Make control characters "printable", using character escape codes (CEC)
1990 sub quot_cec {
1991         my $cntrl = shift;
1992         my %opts = @_;
1993         my %es = ( # character escape codes, aka escape sequences
1994                 "\t" => '\t',   # tab            (HT)
1995                 "\n" => '\n',   # line feed      (LF)
1996                 "\r" => '\r',   # carrige return (CR)
1997                 "\f" => '\f',   # form feed      (FF)
1998                 "\b" => '\b',   # backspace      (BS)
1999                 "\a" => '\a',   # alarm (bell)   (BEL)
2000                 "\e" => '\e',   # escape         (ESC)
2001                 "\013" => '\v', # vertical tab   (VT)
2002                 "\000" => '\0', # nul character  (NUL)
2003         );
2004         my $chr = ( (exists $es{$cntrl})
2005                     ? $es{$cntrl}
2006                     : sprintf('\x%02x', ord($cntrl)) );
2007         if ($opts{-nohtml}) {
2008                 return $chr;
2009         } else {
2010                 return "<span class=\"cntrl\">$chr</span>";
2011         }
2012 }
2013
2014 # Alternatively use unicode control pictures codepoints,
2015 # Unicode "printable representation" (PR)
2016 sub quot_upr {
2017         my $cntrl = shift;
2018         my %opts = @_;
2019
2020         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
2021         if ($opts{-nohtml}) {
2022                 return $chr;
2023         } else {
2024                 return "<span class=\"cntrl\">$chr</span>";
2025         }
2026 }
2027
2028 # git may return quoted and escaped filenames
2029 sub unquote {
2030         my $str = shift;
2031
2032         sub unq {
2033                 my $seq = shift;
2034                 my %es = ( # character escape codes, aka escape sequences
2035                         't' => "\t",   # tab            (HT, TAB)
2036                         'n' => "\n",   # newline        (NL)
2037                         'r' => "\r",   # return         (CR)
2038                         'f' => "\f",   # form feed      (FF)
2039                         'b' => "\b",   # backspace      (BS)
2040                         'a' => "\a",   # alarm (bell)   (BEL)
2041                         'e' => "\e",   # escape         (ESC)
2042                         'v' => "\013", # vertical tab   (VT)
2043                 );
2044
2045                 if ($seq =~ m/^[0-7]{1,3}$/) {
2046                         # octal char sequence
2047                         return chr(oct($seq));
2048                 } elsif (exists $es{$seq}) {
2049                         # C escape sequence, aka character escape code
2050                         return $es{$seq};
2051                 }
2052                 # quoted ordinary character
2053                 return $seq;
2054         }
2055
2056         if ($str =~ m/^"(.*)"$/) {
2057                 # needs unquoting
2058                 $str = $1;
2059                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
2060         }
2061         return $str;
2062 }
2063
2064 # escape tabs (convert tabs to spaces)
2065 sub untabify {
2066         my $line = shift;
2067
2068         while ((my $pos = index($line, "\t")) != -1) {
2069                 if (my $count = (8 - ($pos % 8))) {
2070                         my $spaces = ' ' x $count;
2071                         $line =~ s/\t/$spaces/;
2072                 }
2073         }
2074
2075         return $line;
2076 }
2077
2078 sub project_in_list {
2079         my $project = shift;
2080         my @list = git_get_projects_list();
2081         return @list && scalar(grep { $_->{'path'} eq $project } @list);
2082 }
2083
2084 sub cached_page_precondition_check {
2085         my $action = shift;
2086         return 1 unless
2087                 $action eq 'summary' &&
2088                 $projlist_cache_lifetime > 0 &&
2089                 gitweb_check_feature('forks');
2090
2091         # Note that ALL the 'forkchange' logic is in this function.
2092         # It does NOT belong in cached_action_page NOR in cached_action_start
2093         # NOR in cached_action_finish.  None of those functions should know anything
2094         # about nor do anything to any of the 'forkchange'/"$action.forkchange" files.
2095
2096         # besides the basic 'changed' "$action.changed" check, we may only use
2097         # a summary cache if:
2098         #
2099         #   1) we are not using a project list cache file
2100         #   -OR-
2101         #   2) we are not using the 'forks' feature
2102         #   -OR-
2103         #   3) there is no 'forkchange' nor "$action.forkchange" file in $html_cache_dir
2104         #   -OR-
2105         #   4) there is no cache file ("$cache_dir/$projlist_cache_name")
2106         #   -OR-
2107         #   5) the OLDER of 'forkchange'/"$action.forkchange" is NEWER than the cache file
2108         #
2109         # Otherwise we must re-generate the cache because we've had a fork change
2110         # (either a fork was added or a fork was removed) AND the change has been
2111         # picked up in the cache file AND we've not got that in our cached copy
2112         #
2113         # For (5) regenerating the cached page wouldn't get us anything if the project
2114         # cache file is older than the 'forkchange'/"$action.forkchange" because the
2115         # forks information comes from the project cache file and it's clearly not
2116         # picked up the changes yet so we may continue to use a cached page until it does.
2117
2118         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2119         my $fc_mt = (stat("$htmlcd/forkchange"))[9];
2120         my $afc_mt = (stat("$htmlcd/$action.forkchange"))[9];
2121         return 1 unless defined($fc_mt) || defined($afc_mt);
2122         my $prj_mt = (stat("$cache_dir/$projlist_cache_name"))[9];
2123         return 1 unless $prj_mt;
2124         my $old_mt = $fc_mt;
2125         $old_mt = $afc_mt if !defined($old_mt) || (defined($afc_mt) && $afc_mt < $old_mt);
2126         return 1 if $old_mt > $prj_mt;
2127
2128         # We're going to regenerate the cached page because we know the project cache
2129         # has new fork information that we cannot possibly have in our cached copy.
2130         #
2131         # However, if both 'forkchange' and "$action.forkchange" exist and one of
2132         # them is older than the project cache and one of them is newer, we still
2133         # need to regenerate the page cache, but we will also need to do it again
2134         # in the future because there's yet another fork update not yet in the cache.
2135         #
2136         # So we make sure to touch "$action.changed" to force a cache regeneration
2137         # and then we remove either or both of 'forkchange'/"$action.forkchange" if
2138         # they're older than the project cache (they've served their purpose, we're
2139         # forcing a page regeneration by touching "$action.changed" but the project
2140         # cache was rebuilt since then so there are no more pending fork updates to
2141         # pick up in the future and they need to go).
2142
2143         # For best results, the external code that touches 'forkchange' should always
2144         # touch 'forkchange' and additionally touch 'summary.forkchange' but only
2145         # if it does not already exist.  That way the cached page will be regenerated
2146         # each time it's requested and ANY fork updates are available in the proj
2147         # cache rather than waiting until they all are before updating.
2148
2149         # Note that we take a shortcut here and will zap 'forkchange' since we know
2150         # that it only affects the 'summary' cache.  If, in the future, it affects
2151         # other cache types, it will first need to be propogated down to
2152         # "$action.forkchange" for those types before we zap it.
2153
2154         my $fd;
2155         open $fd, '>', "$htmlcd/$action.changed" and close $fd;
2156         $fc_mt=undef, unlink "$htmlcd/forkchange" if defined $fc_mt && $fc_mt < $prj_mt;
2157         $afc_mt=undef, unlink "$htmlcd/$action.forkchange" if defined $afc_mt && $afc_mt < $prj_mt;
2158
2159         # Now we propagate 'forkchange' to "$action.forkchange" if we have the
2160         # one and not the other.
2161
2162         if (defined $fc_mt && ! defined $afc_mt) {
2163                 open $fd, '>', "$htmlcd/$action.forkchange" and close $fd;
2164                 -e "$htmlcd/$action.forkchange" and
2165                 utime($fc_mt, $fc_mt, "$htmlcd/$action.forkchange") and
2166                 unlink "$htmlcd/forkchange";
2167         }
2168
2169         return 0;
2170 }
2171
2172 sub cached_action_page {
2173         my $action = shift;
2174
2175         return undef unless $action && $html_cache_actions{$action} && $html_cache_dir;
2176         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2177         return undef if -e "$htmlcd/changed" || -e "$htmlcd/$action.changed";
2178         return undef unless cached_page_precondition_check($action);
2179         open my $fd, '<', "$htmlcd/$action" or return undef;
2180         binmode $fd;
2181         local $/;
2182         my $cached_page = <$fd>;
2183         close $fd or return undef;
2184         return $cached_page;
2185 }
2186
2187 package Git::Gitweb::CacheFile;
2188
2189 sub TIEHANDLE {
2190         use POSIX qw(:fcntl_h);
2191         my $class = shift;
2192         my $cachefile = shift;
2193
2194         sysopen(my $self, $cachefile, O_WRONLY|O_CREAT|O_EXCL, 0664)
2195                 or return undef;
2196         $$self->{'cachefile'} = $cachefile;
2197         $$self->{'opened'} = 1;
2198         $$self->{'contents'} = '';
2199         return bless $self, $class;
2200 }
2201
2202 sub CLOSE {
2203         my $self = shift;
2204         if ($$self->{'opened'}) {
2205                 $$self->{'opened'} = 0;
2206                 my $result = close $self;
2207                 unlink $$self->{'cachefile'} unless $result;
2208                 return $result;
2209         }
2210         return 0;
2211 }
2212
2213 sub DESTROY {
2214         my $self = shift;
2215         if ($$self->{'opened'}) {
2216                 $self->CLOSE() and unlink $$self->{'cachefile'};
2217         }
2218 }
2219
2220 sub PRINT {
2221         my $self = shift;
2222         @_ = (map {my $x=$_; utf8::encode($x); $x} @_) unless $fcgi_raw_mode;
2223         print $self @_ if $$self->{'opened'};
2224         $$self->{'contents'} .= join('', @_);
2225         return 1;
2226 }
2227
2228 sub PRINTF {
2229         my $self = shift;
2230         my $template = shift;
2231         return $self->PRINT(sprintf $template, @_);
2232 }
2233
2234 sub contents {
2235         my $self = shift;
2236         return $$self->{'contents'};
2237 }
2238
2239 package main;
2240
2241 # Caller is responsible for preserving STDOUT beforehand if needed
2242 sub cached_action_start {
2243         my $action = shift;
2244
2245         return undef unless $html_cache_actions{$action} && $html_cache_dir;
2246         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2247         return undef unless -d $htmlcd;
2248         if (-e "$htmlcd/changed") {
2249                 foreach my $cacheable (keys(%html_cache_actions)) {
2250                         next unless $supported_cache_actions{$cacheable} &&
2251                                     $html_cache_actions{$cacheable};
2252                         my $fd;
2253                         open $fd, '>', "$htmlcd/$cacheable.changed"
2254                         and close $fd;
2255                 }
2256                 unlink "$htmlcd/changed";
2257         }
2258         local *CACHEFILE;
2259         tie *CACHEFILE, 'Git::Gitweb::CacheFile', "$htmlcd/$action.lock"  or return undef;
2260         *STDOUT = *CACHEFILE;
2261         unlink "$htmlcd/$action", "$htmlcd/$action.changed";
2262         return 1;
2263 }
2264
2265 # Caller is responsible for restoring STDOUT afterward if needed
2266 sub cached_action_finish {
2267         my $action = shift;
2268
2269         use File::Spec;
2270
2271         my $obj = tied *STDOUT;
2272         return undef unless ref($obj) eq 'Git::Gitweb::CacheFile';
2273         my $cached_page = $obj->contents;
2274         (my $result = close(STDOUT)) or warn "couldn't close cache file on STDOUT: $!";
2275         # Do not leave STDOUT file descriptor invalid!
2276         local *NULL;
2277         open(NULL, '>', File::Spec->devnull) or die "couldn't open NULL to devnull: $!";
2278         *STDOUT = *NULL;
2279         return $cached_page unless $result;
2280         my $htmlcd = "$projectroot/$project/$html_cache_dir";
2281         return $cached_page unless -d $htmlcd;
2282         unlink "$htmlcd/$action.lock" unless rename "$htmlcd/$action.lock", "$htmlcd/$action";
2283         return $cached_page;
2284 }
2285
2286 my %expand_pi_subs;
2287 BEGIN {%expand_pi_subs = (
2288         'age_string'              => \&age_string,
2289         'age_string_date'         => \&age_string_date,
2290         'age_string_age'          => \&age_string_age,
2291         'compute_timed_interval'  => \&compute_timed_interval,
2292         'compute_commands_count'  => \&compute_commands_count,
2293 )}
2294
2295 # Expands any <?gitweb...> processing instructions and returns the result
2296 sub expand_gitweb_pi {
2297         my $page = shift;
2298         $page .= '';
2299         my @time_now = gettimeofday();
2300         $page =~ s{<\?gitweb(?:\s+([^\s>]+)([^>]*))?\s*\?>}
2301                   {defined($1) ?
2302                           (ref($expand_pi_subs{$1}) eq 'CODE' ?
2303                                   $expand_pi_subs{$1}->(split(' ',$2), @time_now) :
2304                                   '') :
2305                           '' }goes;
2306         return $page;
2307 }
2308
2309 ## ----------------------------------------------------------------------
2310 ## HTML aware string manipulation
2311
2312 # Try to chop given string on a word boundary between position
2313 # $len and $len+$add_len. If there is no word boundary there,
2314 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
2315 # (marking chopped part) would be longer than given string.
2316 sub chop_str {
2317         my $str = shift;
2318         my $len = shift;
2319         my $add_len = shift || 10;
2320         my $where = shift || 'right'; # 'left' | 'center' | 'right'
2321
2322         # Make sure perl knows it is utf8 encoded so we don't
2323         # cut in the middle of a utf8 multibyte char.
2324         $str = to_utf8($str);
2325
2326         # allow only $len chars, but don't cut a word if it would fit in $add_len
2327         # if it doesn't fit, cut it if it's still longer than the dots we would add
2328         # remove chopped character entities entirely
2329
2330         # when chopping in the middle, distribute $len into left and right part
2331         # return early if chopping wouldn't make string shorter
2332         if ($where eq 'center') {
2333                 return $str if ($len + 5 >= length($str)); # filler is length 5
2334                 $len = int($len/2);
2335         } else {
2336                 return $str if ($len + 4 >= length($str)); # filler is length 4
2337         }
2338
2339         # regexps: ending and beginning with word part up to $add_len
2340         my $endre = qr/.{$len}\w{0,$add_len}/;
2341         my $begre = qr/\w{0,$add_len}.{$len}/;
2342
2343         if ($where eq 'left') {
2344                 $str =~ m/^(.*?)($begre)$/;
2345                 my ($lead, $body) = ($1, $2);
2346                 if (length($lead) > 4) {
2347                         $lead = " ...";
2348                 }
2349                 return "$lead$body";
2350
2351         } elsif ($where eq 'center') {
2352                 $str =~ m/^($endre)(.*)$/;
2353                 my ($left, $str)  = ($1, $2);
2354                 $str =~ m/^(.*?)($begre)$/;
2355                 my ($mid, $right) = ($1, $2);
2356                 if (length($mid) > 5) {
2357                         $mid = " ... ";
2358                 }
2359                 return "$left$mid$right";
2360
2361         } else {
2362                 $str =~ m/^($endre)(.*)$/;
2363                 my $body = $1;
2364                 my $tail = $2;
2365                 if (length($tail) > 4) {
2366                         $tail = "... ";
2367                 }
2368                 return "$body$tail";
2369         }
2370 }
2371
2372 # pass-through email filter, obfuscating it when possible
2373 sub email_obfuscate {
2374         our $email;
2375         my ($str) = @_;
2376         if ($email) {
2377                 $str = $email->escape_html($str);
2378                 # Stock HTML::Email::Obfuscate version likes to produce
2379                 # invalid XHTML...
2380                 $str =~ s#<(/?)B>#<$1b>#g;
2381                 return $str;
2382         } else {
2383                 $str = esc_html($str);
2384                 $str =~ s/@/&#x40;/;
2385                 return $str;
2386         }
2387 }
2388
2389 # takes the same arguments as chop_str, but also wraps a <span> around the
2390 # result with a title attribute if it does get chopped. Additionally, the
2391 # string is HTML-escaped.
2392 sub chop_and_escape_str {
2393         my ($str) = @_;
2394
2395         my $chopped = chop_str(@_);
2396         $str = to_utf8($str);
2397         if ($chopped eq $str) {
2398                 return email_obfuscate($chopped);
2399         } else {
2400                 use bytes;
2401                 $str =~ s/[[:cntrl:]]/?/g;
2402                 return $cgi->span({-title=>$str}, email_obfuscate($chopped));
2403         }
2404 }
2405
2406 # Highlight selected fragments of string, using given CSS class,
2407 # and escape HTML.  It is assumed that fragments do not overlap.
2408 # Regions are passed as list of pairs (array references).
2409 #
2410 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
2411 # '<span class="mark">foo</span>bar'
2412 sub esc_html_hl_regions {
2413         my ($str, $css_class, @sel) = @_;
2414         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
2415         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
2416         return esc_html($str, %opts) unless @sel;
2417
2418         my $out = '';
2419         my $pos = 0;
2420
2421         for my $s (@sel) {
2422                 my ($begin, $end) = @$s;
2423
2424                 # Don't create empty <span> elements.
2425                 next if $end <= $begin;
2426
2427                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
2428                                        %opts);
2429
2430                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
2431                         if ($begin - $pos > 0);
2432                 $out .= $cgi->span({-class => $css_class}, $escaped);
2433
2434                 $pos = $end;
2435         }
2436         $out .= esc_html(substr($str, $pos), %opts)
2437                 if ($pos < length($str));
2438
2439         return $out;
2440 }
2441
2442 # return positions of beginning and end of each match
2443 sub matchpos_list {
2444         my ($str, $regexp) = @_;
2445         return unless (defined $str && defined $regexp);
2446
2447         my @matches;
2448         while ($str =~ /$regexp/g) {
2449                 push @matches, [$-[0], $+[0]];
2450         }
2451         return @matches;
2452 }
2453
2454 # highlight match (if any), and escape HTML
2455 sub esc_html_match_hl {
2456         my ($str, $regexp) = @_;
2457         return esc_html($str) unless defined $regexp;
2458
2459         my @matches = matchpos_list($str, $regexp);
2460         return esc_html($str) unless @matches;
2461
2462         return esc_html_hl_regions($str, 'match', @matches);
2463 }
2464
2465
2466 # highlight match (if any) of shortened string, and escape HTML
2467 sub esc_html_match_hl_chopped {
2468         my ($str, $chopped, $regexp) = @_;
2469         return esc_html_match_hl($str, $regexp) unless defined $chopped;
2470
2471         my @matches = matchpos_list($str, $regexp);
2472         return esc_html($chopped) unless @matches;
2473
2474         # filter matches so that we mark chopped string
2475         my $tail = "... "; # see chop_str
2476         unless ($chopped =~ s/\Q$tail\E$//) {
2477                 $tail = '';
2478         }
2479         my $chop_len = length($chopped);
2480         my $tail_len = length($tail);
2481         my @filtered;
2482
2483         for my $m (@matches) {
2484                 if ($m->[0] > $chop_len) {
2485                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
2486                         last;
2487                 } elsif ($m->[1] > $chop_len) {
2488                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
2489                         last;
2490                 }
2491                 push @filtered, $m;
2492         }
2493
2494         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
2495 }
2496
2497 ## ----------------------------------------------------------------------
2498 ## functions returning short strings
2499
2500 # CSS class for given age epoch value (in seconds)
2501 # and reference time (optional, defaults to now) as second value
2502 sub age_class {
2503         my ($age_epoch, $time_now) = @_;
2504         return "noage" unless defined $age_epoch;
2505         defined $time_now or $time_now = time;
2506         my $age = $time_now - $age_epoch;
2507
2508         if ($age < 60*60*2) {
2509                 return "age0";
2510         } elsif ($age < 60*60*24*2) {
2511                 return "age1";
2512         } else {
2513                 return "age2";
2514         }
2515 }
2516
2517 # convert age epoch in seconds to "nn units ago" string
2518 # reference time used is now unless second argument passed in
2519 # to get the old behavior, pass 0 as the first argument and
2520 # the time in seconds as the second
2521 sub age_string {
2522         my ($age_epoch, $time_now) = @_;
2523         return "unknown" unless defined $age_epoch;
2524         return "<?gitweb age_string $age_epoch?>" if $cache_mode_active;
2525         defined $time_now or $time_now = time;
2526         my $age = $time_now - $age_epoch;
2527         my $age_str;
2528
2529         if ($age > 60*60*24*365*2) {
2530                 $age_str = (int $age/60/60/24/365);
2531                 $age_str .= " years ago";
2532         } elsif ($age > 60*60*24*(365/12)*2) {
2533                 $age_str = int $age/60/60/24/(365/12);
2534                 $age_str .= " months ago";
2535         } elsif ($age > 60*60*24*7*2) {
2536                 $age_str = int $age/60/60/24/7;
2537                 $age_str .= " weeks ago";
2538         } elsif ($age > 60*60*24*2) {
2539                 $age_str = int $age/60/60/24;
2540                 $age_str .= " days ago";
2541         } elsif ($age > 60*60*2) {
2542                 $age_str = int $age/60/60;
2543                 $age_str .= " hours ago";
2544         } elsif ($age > 60*2) {
2545                 $age_str = int $age/60;
2546                 $age_str .= " min ago";
2547         } elsif ($age > 2) {
2548                 $age_str = int $age;
2549                 $age_str .= " sec ago";
2550         } else {
2551                 $age_str .= " right now";
2552         }
2553         return $age_str;
2554 }
2555
2556 # returns age_string if the age is <= 2 weeks otherwise an absolute date
2557 # this is typically shown to the user directly with the age_string_age as a title
2558 sub age_string_date {
2559         my ($age_epoch, $time_now) = @_;
2560         return "unknown" unless defined $age_epoch;
2561         return "<?gitweb age_string_date $age_epoch?>" if $cache_mode_active;
2562         defined $time_now or $time_now = time;
2563         my $age = $time_now - $age_epoch;
2564
2565         if ($age > 60*60*24*7*2) {
2566                 my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($age_epoch);
2567                 return sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2568         } else {
2569                 return age_string($age_epoch, $time_now);
2570         }
2571 }
2572
2573 # returns an absolute date if the age is <= 2 weeks otherwise age_string
2574 # this is typically used for the 'title' attribute so it will show as a tooltip
2575 sub age_string_age {
2576         my ($age_epoch, $time_now) = @_;
2577         return "unknown" unless defined $age_epoch;
2578         return "<?gitweb age_string_age $age_epoch?>" if $cache_mode_active;
2579         defined $time_now or $time_now = time;
2580         my $age = $time_now - $age_epoch;
2581
2582         if ($age > 60*60*24*7*2) {
2583                 return age_string($age_epoch, $time_now);
2584         } else {
2585                 my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($age_epoch);
2586                 return sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2587         }
2588 }
2589
2590 use constant {
2591         S_IFINVALID => 0030000,
2592         S_IFGITLINK => 0160000,
2593 };
2594
2595 # submodule/subproject, a commit object reference
2596 sub S_ISGITLINK {
2597         my $mode = shift;
2598
2599         return (($mode & S_IFMT) == S_IFGITLINK)
2600 }
2601
2602 # convert file mode in octal to symbolic file mode string
2603 sub mode_str {
2604         my $mode = oct shift;
2605
2606         if (S_ISGITLINK($mode)) {
2607                 return 'm---------';
2608         } elsif (S_ISDIR($mode & S_IFMT)) {
2609                 return 'drwxr-xr-x';
2610         } elsif (S_ISLNK($mode)) {
2611                 return 'lrwxrwxrwx';
2612         } elsif (S_ISREG($mode)) {
2613                 # git cares only about the executable bit
2614                 if ($mode & S_IXUSR) {
2615                         return '-rwxr-xr-x';
2616                 } else {
2617                         return '-rw-r--r--';
2618                 };
2619         } else {
2620                 return '----------';
2621         }
2622 }
2623
2624 # convert file mode in octal to file type string
2625 sub file_type {
2626         my $mode = shift;
2627
2628         if ($mode !~ m/^[0-7]+$/) {
2629                 return $mode;
2630         } else {
2631                 $mode = oct $mode;
2632         }
2633
2634         if (S_ISGITLINK($mode)) {
2635                 return "submodule";
2636         } elsif (S_ISDIR($mode & S_IFMT)) {
2637                 return "directory";
2638         } elsif (S_ISLNK($mode)) {
2639                 return "symlink";
2640         } elsif (S_ISREG($mode)) {
2641                 return "file";
2642         } else {
2643                 return "unknown";
2644         }
2645 }
2646
2647 # convert file mode in octal to file type description string
2648 sub file_type_long {
2649         my $mode = shift;
2650
2651         if ($mode !~ m/^[0-7]+$/) {
2652                 return $mode;
2653         } else {
2654                 $mode = oct $mode;
2655         }
2656
2657         if (S_ISGITLINK($mode)) {
2658                 return "submodule";
2659         } elsif (S_ISDIR($mode & S_IFMT)) {
2660                 return "directory";
2661         } elsif (S_ISLNK($mode)) {
2662                 return "symlink";
2663         } elsif (S_ISREG($mode)) {
2664                 if ($mode & S_IXUSR) {
2665                         return "executable";
2666                 } else {
2667                         return "file";
2668                 };
2669         } else {
2670                 return "unknown";
2671         }
2672 }
2673
2674
2675 ## ----------------------------------------------------------------------
2676 ## functions returning short HTML fragments, or transforming HTML fragments
2677 ## which don't belong to other sections
2678
2679 # format line of commit message.
2680 sub format_log_line_html {
2681         my $line = shift;
2682
2683         $line = esc_html($line, -nbsp=>1);
2684         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2685                 $cgi->a({-href => href(action=>"object", hash=>$1),
2686                                         -class => "text"}, $1);
2687         }eg unless $line =~ /^\s*git-svn-id:/;
2688
2689         return $line;
2690 }
2691
2692 # format marker of refs pointing to given object
2693
2694 # the destination action is chosen based on object type and current context:
2695 # - for annotated tags, we choose the tag view unless it's the current view
2696 #   already, in which case we go to shortlog view
2697 # - for other refs, we keep the current view if we're in history, shortlog or
2698 #   log view, and select shortlog otherwise
2699 sub format_ref_marker {
2700         my ($refs, $id) = @_;
2701         my $markers = '';
2702
2703         if (defined $refs->{$id}) {
2704                 foreach my $ref (@{$refs->{$id}}) {
2705                         # this code exploits the fact that non-lightweight tags are the
2706                         # only indirect objects, and that they are the only objects for which
2707                         # we want to use tag instead of shortlog as action
2708                         my ($type, $name) = qw();
2709                         my $indirect = ($ref =~ s/\^\{\}$//);
2710                         # e.g. tags/v2.6.11 or heads/next
2711                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2712                                 $type = $1;
2713                                 $name = $2;
2714                         } else {
2715                                 $type = "ref";
2716                                 $name = $ref;
2717                         }
2718
2719                         my $class = $type;
2720                         $class .= " indirect" if $indirect;
2721
2722                         my $dest_action = "shortlog";
2723
2724                         if ($indirect) {
2725                                 $dest_action = "tag" unless $action eq "tag";
2726                         } elsif ($action =~ /^(history|(short)?log)$/) {
2727                                 $dest_action = $action;
2728                         }
2729
2730                         my $dest = "";
2731                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2732                         $dest .= $ref;
2733
2734                         my $link = $cgi->a({
2735                                 -href => href(
2736                                         action=>$dest_action,
2737                                         hash=>$dest
2738                                 )}, $name);
2739
2740                         $markers .= "<span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2741                                 $link . "</span>";
2742                 }
2743         }
2744
2745         if ($markers) {
2746                 return '<span class="refs">'. $markers . '</span>';
2747         } else {
2748                 return "";
2749         }
2750 }
2751
2752 # format, perhaps shortened and with markers, title line
2753 sub format_subject_html {
2754         my ($long, $short, $href, $extra) = @_;
2755         $extra = '' unless defined($extra);
2756
2757         if (length($short) < length($long)) {
2758                 use bytes;
2759                 $long =~ s/[[:cntrl:]]/?/g;
2760                 return $cgi->a({-href => $href, -class => "list subject",
2761                                 -title => to_utf8($long)},
2762                        esc_html($short)) . $extra;
2763         } else {
2764                 return $cgi->a({-href => $href, -class => "list subject"},
2765                        esc_html($long)) . $extra;
2766         }
2767 }
2768
2769 # Rather than recomputing the url for an email multiple times, we cache it
2770 # after the first hit. This gives a visible benefit in views where the avatar
2771 # for the same email is used repeatedly (e.g. shortlog).
2772 # The cache is shared by all avatar engines (currently gravatar only), which
2773 # are free to use it as preferred. Since only one avatar engine is used for any
2774 # given page, there's no risk for cache conflicts.
2775 our %avatar_cache = ();
2776
2777 # Compute the picon url for a given email, by using the picon search service over at
2778 # http://www.cs.indiana.edu/picons/search.html
2779 sub picon_url {
2780         my $email = lc shift;
2781         if (!$avatar_cache{$email}) {
2782                 my ($user, $domain) = split('@', $email);
2783                 $avatar_cache{$email} =
2784                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2785                         "$domain/$user/" .
2786                         "users+domains+unknown/up/single";
2787         }
2788         return $avatar_cache{$email};
2789 }
2790
2791 # Compute the gravatar url for a given email, if it's not in the cache already.
2792 # Gravatar stores only the part of the URL before the size, since that's the
2793 # one computationally more expensive. This also allows reuse of the cache for
2794 # different sizes (for this particular engine).
2795 sub gravatar_url {
2796         my $email = lc shift;
2797         my $size = shift;
2798         $avatar_cache{$email} ||=
2799                 "//www.gravatar.com/avatar/" .
2800                         Digest::MD5::md5_hex($email) . "?s=";
2801         return $avatar_cache{$email} . $size;
2802 }
2803
2804 # Insert an avatar for the given $email at the given $size if the feature
2805 # is enabled.
2806 sub git_get_avatar {
2807         my ($email, %opts) = @_;
2808         my $pre_white  = ($opts{-pad_before} ? "&#160;" : "");
2809         my $post_white = ($opts{-pad_after}  ? "&#160;" : "");
2810         $opts{-size} ||= 'default';
2811         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2812         my $url = "";
2813         if ($git_avatar eq 'gravatar') {
2814                 $url = gravatar_url($email, $size);
2815         } elsif ($git_avatar eq 'picon') {
2816                 $url = picon_url($email);
2817         }
2818         # Other providers can be added by extending the if chain, defining $url
2819         # as needed. If no variant puts something in $url, we assume avatars
2820         # are completely disabled/unavailable.
2821         if ($url) {
2822                 return $pre_white .
2823                        "<img width=\"$size\" " .
2824                             "class=\"avatar\" " .
2825                             "src=\"".esc_url($url)."\" " .
2826                             "alt=\"\" " .
2827                        "/>" . $post_white;
2828         } else {
2829                 return "";
2830         }
2831 }
2832
2833 sub format_search_author {
2834         my ($author, $searchtype, $displaytext) = @_;
2835         my $have_search = gitweb_check_feature('search');
2836
2837         if ($have_search) {
2838                 my $performed = "";
2839                 if ($searchtype eq 'author') {
2840                         $performed = "authored";
2841                 } elsif ($searchtype eq 'committer') {
2842                         $performed = "committed";
2843                 }
2844
2845                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2846                                 searchtext=>$author,
2847                                 searchtype=>$searchtype), class=>"list",
2848                                 title=>"Search for commits $performed by $author"},
2849                                 $displaytext);
2850
2851         } else {
2852                 return $displaytext;
2853         }
2854 }
2855
2856 # format the author name of the given commit with the given tag
2857 # the author name is chopped and escaped according to the other
2858 # optional parameters (see chop_str).
2859 sub format_author_html {
2860         my $tag = shift;
2861         my $co = shift;
2862         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2863         return "<$tag class=\"author\">" .
2864                format_search_author($co->{'author_name'}, "author",
2865                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2866                        $author) .
2867                "</$tag>";
2868 }
2869
2870 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2871 sub format_git_diff_header_line {
2872         my $line = shift;
2873         my $diffinfo = shift;
2874         my ($from, $to) = @_;
2875
2876         if ($diffinfo->{'nparents'}) {
2877                 # combined diff
2878                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2879                 if ($to->{'href'}) {
2880                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2881                                          esc_path($to->{'file'}));
2882                 } else { # file was deleted (no href)
2883                         $line .= esc_path($to->{'file'});
2884                 }
2885         } else {
2886                 # "ordinary" diff
2887                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2888                 if ($from->{'href'}) {
2889                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2890                                          'a/' . esc_path($from->{'file'}));
2891                 } else { # file was added (no href)
2892                         $line .= 'a/' . esc_path($from->{'file'});
2893                 }
2894                 $line .= ' ';
2895                 if ($to->{'href'}) {
2896                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2897                                          'b/' . esc_path($to->{'file'}));
2898                 } else { # file was deleted
2899                         $line .= 'b/' . esc_path($to->{'file'});
2900                 }
2901         }
2902
2903         return "<div class=\"diff header\">$line</div>\n";
2904 }
2905
2906 # format extended diff header line, before patch itself
2907 sub format_extended_diff_header_line {
2908         my $line = shift;
2909         my $diffinfo = shift;
2910         my ($from, $to) = @_;
2911
2912         # match <path>
2913         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2914                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2915                                        esc_path($from->{'file'}));
2916         }
2917         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2918                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2919                                  esc_path($to->{'file'}));
2920         }
2921         # match single <mode>
2922         if ($line =~ m/\s(\d{6})$/) {
2923                 $line .= '<span class="info"> (' .
2924                          file_type_long($1) .
2925                          ')</span>';
2926         }
2927         # match <hash>
2928         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2929                 # can match only for combined diff
2930                 $line = 'index ';
2931                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2932                         if ($from->{'href'}[$i]) {
2933                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2934                                                   -class=>"hash"},
2935                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2936                         } else {
2937                                 $line .= '0' x 7;
2938                         }
2939                         # separator
2940                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2941                 }
2942                 $line .= '..';
2943                 if ($to->{'href'}) {
2944                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2945                                          substr($diffinfo->{'to_id'},0,7));
2946                 } else {
2947                         $line .= '0' x 7;
2948                 }
2949
2950         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2951                 # can match only for ordinary diff
2952                 my ($from_link, $to_link);
2953                 if ($from->{'href'}) {
2954                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2955                                              substr($diffinfo->{'from_id'},0,7));
2956                 } else {
2957                         $from_link = '0' x 7;
2958                 }
2959                 if ($to->{'href'}) {
2960                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2961                                            substr($diffinfo->{'to_id'},0,7));
2962                 } else {
2963                         $to_link = '0' x 7;
2964                 }
2965                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2966                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2967         }
2968
2969         return $line . "<br/>\n";
2970 }
2971
2972 # format from-file/to-file diff header
2973 sub format_diff_from_to_header {
2974         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2975         my $line;
2976         my $result = '';
2977
2978         $line = $from_line;
2979         #assert($line =~ m/^---/) if DEBUG;
2980         # no extra formatting for "^--- /dev/null"
2981         if (! $diffinfo->{'nparents'}) {
2982                 # ordinary (single parent) diff
2983                 if ($line =~ m!^--- "?a/!) {
2984                         if ($from->{'href'}) {
2985                                 $line = '--- a/' .
2986                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2987                                                 esc_path($from->{'file'}));
2988                         } else {
2989                                 $line = '--- a/' .
2990                                         esc_path($from->{'file'});
2991                         }
2992                 }
2993                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2994
2995         } else {
2996                 # combined diff (merge commit)
2997                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2998                         if ($from->{'href'}[$i]) {
2999                                 $line = '--- ' .
3000                                         $cgi->a({-href=>href(action=>"blobdiff",
3001                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
3002                                                              hash_parent_base=>$parents[$i],
3003                                                              file_parent=>$from->{'file'}[$i],
3004                                                              hash=>$diffinfo->{'to_id'},
3005                                                              hash_base=>$hash,
3006                                                              file_name=>$to->{'file'}),
3007                                                  -class=>"path",
3008                                                  -title=>"diff" . ($i+1)},
3009                                                 $i+1) .
3010                                         '/' .
3011                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
3012                                                 esc_path($from->{'file'}[$i]));
3013                         } else {
3014                                 $line = '--- /dev/null';
3015                         }
3016                         $result .= qq!<div class="diff from_file">$line</div>\n!;
3017                 }
3018         }
3019
3020         $line = $to_line;
3021         #assert($line =~ m/^\+\+\+/) if DEBUG;
3022         # no extra formatting for "^+++ /dev/null"
3023         if ($line =~ m!^\+\+\+ "?b/!) {
3024                 if ($to->{'href'}) {
3025                         $line = '+++ b/' .
3026                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
3027                                         esc_path($to->{'file'}));
3028                 } else {
3029                         $line = '+++ b/' .
3030                                 esc_path($to->{'file'});
3031                 }
3032         }
3033         $result .= qq!<div class="diff to_file">$line</div>\n!;
3034
3035         return $result;
3036 }
3037
3038 # create note for patch simplified by combined diff
3039 sub format_diff_cc_simplified {
3040         my ($diffinfo, @parents) = @_;
3041         my $result = '';
3042
3043         $result .= "<div class=\"diff header\">" .
3044                    "diff --cc ";
3045         if (!is_deleted($diffinfo)) {
3046                 $result .= $cgi->a({-href => href(action=>"blob",
3047                                                   hash_base=>$hash,
3048                                                   hash=>$diffinfo->{'to_id'},
3049                                                   file_name=>$diffinfo->{'to_file'}),
3050                                     -class => "path"},
3051                                    esc_path($diffinfo->{'to_file'}));
3052         } else {
3053                 $result .= esc_path($diffinfo->{'to_file'});
3054         }
3055         $result .= "</div>\n" . # class="diff header"
3056                    "<div class=\"diff nodifferences\">" .
3057                    "Simple merge" .
3058                    "</div>\n"; # class="diff nodifferences"
3059
3060         return $result;
3061 }
3062
3063 sub diff_line_class {
3064         my ($line, $from, $to) = @_;
3065
3066         # ordinary diff
3067         my $num_sign = 1;
3068         # combined diff
3069         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
3070                 $num_sign = scalar @{$from->{'href'}};
3071         }
3072
3073         my @diff_line_classifier = (
3074                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
3075                 { regexp => qr/^\\/,               class => "incomplete"  },
3076                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
3077                 # classifier for context must come before classifier add/rem,
3078                 # or we would have to use more complicated regexp, for example
3079                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
3080                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
3081                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
3082         );
3083         for my $clsfy (@diff_line_classifier) {
3084                 return $clsfy->{'class'}
3085                         if ($line =~ $clsfy->{'regexp'});
3086         }
3087
3088         # fallback
3089         return "";
3090 }
3091
3092 # assumes that $from and $to are defined and correctly filled,
3093 # and that $line holds a line of chunk header for unified diff
3094 sub format_unidiff_chunk_header {
3095         my ($line, $from, $to) = @_;
3096
3097         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
3098                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
3099
3100         $from_lines = 0 unless defined $from_lines;
3101         $to_lines   = 0 unless defined $to_lines;
3102
3103         if ($from->{'href'}) {
3104                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
3105                                      -class=>"list"}, $from_text);
3106         }
3107         if ($to->{'href'}) {
3108                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
3109                                      -class=>"list"}, $to_text);
3110         }
3111         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
3112                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
3113         return $line;
3114 }
3115
3116 # assumes that $from and $to are defined and correctly filled,
3117 # and that $line holds a line of chunk header for combined diff
3118 sub format_cc_diff_chunk_header {
3119         my ($line, $from, $to) = @_;
3120
3121         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
3122         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
3123
3124         @from_text = split(' ', $ranges);
3125         for (my $i = 0; $i < @from_text; ++$i) {
3126                 ($from_start[$i], $from_nlines[$i]) =
3127                         (split(',', substr($from_text[$i], 1)), 0);
3128         }
3129
3130         $to_text   = pop @from_text;
3131         $to_start  = pop @from_start;
3132         $to_nlines = pop @from_nlines;
3133
3134         $line = "<span class=\"chunk_info\">$prefix ";
3135         for (my $i = 0; $i < @from_text; ++$i) {
3136                 if ($from->{'href'}[$i]) {
3137                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
3138                                           -class=>"list"}, $from_text[$i]);
3139                 } else {
3140                         $line .= $from_text[$i];
3141                 }
3142                 $line .= " ";
3143         }
3144         if ($to->{'href'}) {
3145                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
3146                                   -class=>"list"}, $to_text);
3147         } else {
3148                 $line .= $to_text;
3149         }
3150         $line .= " $prefix</span>" .
3151                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
3152         return $line;
3153 }
3154
3155 # process patch (diff) line (not to be used for diff headers),
3156 # returning HTML-formatted (but not wrapped) line.
3157 # If the line is passed as a reference, it is treated as HTML and not
3158 # esc_html()'ed.
3159 sub format_diff_line {
3160         my ($line, $diff_class, $from, $to) = @_;
3161
3162         if (ref($line)) {
3163                 $line = $$line;
3164         } else {
3165                 chomp $line;
3166                 $line = untabify($line);
3167
3168                 if ($from && $to && $line =~ m/^\@{2} /) {
3169                         $line = format_unidiff_chunk_header($line, $from, $to);
3170                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
3171                         $line = format_cc_diff_chunk_header($line, $from, $to);
3172                 } else {
3173                         $line = esc_html($line, -nbsp=>1);
3174                 }
3175         }
3176
3177         my $diff_classes = "diff diff_body";
3178         $diff_classes .= " $diff_class" if ($diff_class);
3179         $line = "<div class=\"$diff_classes\">$line</div>\n";
3180
3181         return $line;
3182 }
3183
3184 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
3185 # linked.  Pass the hash of the tree/commit to snapshot.
3186 sub format_snapshot_links {
3187         my ($hash) = @_;
3188         my $num_fmts = @snapshot_fmts;
3189         if ($num_fmts > 1) {
3190                 # A parenthesized list of links bearing format names.
3191                 # e.g. "snapshot (_tar.gz_ _zip_)"
3192                 return "snapshot (" . join(' ', map
3193                         $cgi->a({
3194                                 -href => href(
3195                                         action=>"snapshot",
3196                                         hash=>$hash,
3197                                         snapshot_format=>$_
3198                                 )
3199                         }, $known_snapshot_formats{$_}{'display'})
3200                 , @snapshot_fmts) . ")";
3201         } elsif ($num_fmts == 1) {
3202                 # A single "snapshot" link whose tooltip bears the format name.
3203                 # i.e. "_snapshot_"
3204                 my ($fmt) = @snapshot_fmts;
3205                 return
3206                         $cgi->a({
3207                                 -href => href(
3208                                         action=>"snapshot",
3209                                         hash=>$hash,
3210                                         snapshot_format=>$fmt
3211                                 ),
3212                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
3213                         }, "snapshot");
3214         } else { # $num_fmts == 0
3215                 return undef;
3216         }
3217 }
3218
3219 ## ......................................................................
3220 ## functions returning values to be passed, perhaps after some
3221 ## transformation, to other functions; e.g. returning arguments to href()
3222
3223 # returns hash to be passed to href to generate gitweb URL
3224 # in -title key it returns description of link
3225 sub get_feed_info {
3226         my $format = shift || 'Atom';
3227         my %res = (action => lc($format));
3228         my $matched_ref = 0;
3229
3230         # feed links are possible only for project views
3231         return unless (defined $project);
3232         # some views should link to OPML, or to generic project feed,
3233         # or don't have specific feed yet (so they should use generic)
3234         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
3235
3236         my $branch = undef;
3237         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
3238         # (fullname) to differentiate from tag links; this also makes
3239         # possible to detect branch links
3240         for my $ref (get_branch_refs()) {
3241                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
3242                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
3243                         $branch = $1;
3244                         $matched_ref = $ref;
3245                         last;
3246                 }
3247         }
3248         # find log type for feed description (title)
3249         my $type = 'log';
3250         if (defined $file_name) {
3251                 $type  = "history of $file_name";
3252                 $type .= "/" if ($action eq 'tree');
3253                 $type .= " on '$branch'" if (defined $branch);
3254         } else {
3255                 $type = "log of $branch" if (defined $branch);
3256         }
3257
3258         $res{-title} = $type;
3259         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
3260         $res{'file_name'} = $file_name;
3261
3262         return %res;
3263 }
3264
3265 ## ----------------------------------------------------------------------
3266 ## git utility subroutines, invoking git commands
3267
3268 # returns path to the core git executable and the --git-dir parameter as list
3269 sub git_cmd {
3270         $number_of_git_cmds++;
3271         return $GIT, '--git-dir='.$git_dir;
3272 }
3273
3274 # opens a "-|" cmd pipe handle with 2>/dev/null and returns it
3275 sub cmd_pipe {
3276
3277         # In order to be compatible with FCGI mode we must use POSIX
3278         # and access the STDERR_FILENO file descriptor directly
3279
3280         use POSIX qw(STDERR_FILENO dup dup2);
3281
3282         open(my $null, '>', File::Spec->devnull) or die "couldn't open devnull: $!";
3283         (my $saveerr = dup(STDERR_FILENO)) or die "couldn't dup STDERR: $!";
3284         my $dup2ok = dup2(fileno($null), STDERR_FILENO);
3285         close($null) or !$dup2ok or die "couldn't close NULL: $!";
3286         $dup2ok or POSIX::close($saveerr), die "couldn't dup NULL to STDERR: $!";
3287         my $result = open(my $fd, "-|", @_);
3288         $dup2ok = dup2($saveerr, STDERR_FILENO);
3289         POSIX::close($saveerr) or !$dup2ok or die "couldn't close SAVEERR: $!";
3290         $dup2ok or die "couldn't dup SAVERR to STDERR: $!";
3291
3292         return $result ? $fd : undef;
3293 }
3294
3295 # opens a "-|" git_cmd pipe handle with 2>/dev/null and returns it
3296 sub git_cmd_pipe {
3297         return cmd_pipe git_cmd(), @_;
3298 }
3299
3300 # quote the given arguments for passing them to the shell
3301 # quote_command("command", "arg 1", "arg with ' and ! characters")
3302 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
3303 # Try to avoid using this function wherever possible.
3304 sub quote_command {
3305         return join(' ',
3306                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
3307 }
3308
3309 # get HEAD ref of given project as hash
3310 sub git_get_head_hash {
3311         return git_get_full_hash(shift, 'HEAD');
3312 }
3313
3314 sub git_get_full_hash {
3315         return git_get_hash(@_);
3316 }
3317
3318 sub git_get_short_hash {
3319         return git_get_hash(@_, '--short=7');
3320 }
3321
3322 sub git_get_hash {
3323         my ($project, $hash, @options) = @_;
3324         my $o_git_dir = $git_dir;
3325         my $retval = undef;
3326         $git_dir = "$projectroot/$project";
3327         if (defined(my $fd = git_cmd_pipe 'rev-parse',
3328             '--verify', '-q', @options, $hash)) {
3329                 $retval = <$fd>;
3330                 chomp $retval if defined $retval;
3331                 close $fd;
3332         }
3333         if (defined $o_git_dir) {
3334                 $git_dir = $o_git_dir;
3335         }
3336         return $retval;
3337 }
3338
3339 # get type of given object
3340 sub git_get_type {
3341         my $hash = shift;
3342
3343         defined(my $fd = git_cmd_pipe "cat-file", '-t', $hash) or return;
3344         my $type = <$fd>;
3345         close $fd or return;
3346         chomp $type;
3347         return $type;
3348 }
3349
3350 # repository configuration
3351 our $config_file = '';
3352 our %config;
3353
3354 # store multiple values for single key as anonymous array reference
3355 # single values stored directly in the hash, not as [ <value> ]
3356 sub hash_set_multi {
3357         my ($hash, $key, $value) = @_;
3358
3359         if (!exists $hash->{$key}) {
3360                 $hash->{$key} = $value;
3361         } elsif (!ref $hash->{$key}) {
3362                 $hash->{$key} = [ $hash->{$key}, $value ];
3363         } else {
3364                 push @{$hash->{$key}}, $value;
3365         }
3366 }
3367
3368 # return hash of git project configuration
3369 # optionally limited to some section, e.g. 'gitweb'
3370 sub git_parse_project_config {
3371         my $section_regexp = shift;
3372         my %config;
3373
3374         local $/ = "\0";
3375
3376         defined(my $fh = git_cmd_pipe "config", '-z', '-l')
3377                 or return;
3378
3379         while (my $keyval = to_utf8(scalar <$fh>)) {
3380                 chomp $keyval;
3381                 my ($key, $value) = split(/\n/, $keyval, 2);
3382
3383                 hash_set_multi(\%config, $key, $value)
3384                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
3385         }
3386         close $fh;
3387
3388         return %config;
3389 }
3390
3391 # convert config value to boolean: 'true' or 'false'
3392 # no value, number > 0, 'true' and 'yes' values are true
3393 # rest of values are treated as false (never as error)
3394 sub config_to_bool {
3395         my $val = shift;
3396
3397         return 1 if !defined $val;             # section.key
3398
3399         # strip leading and trailing whitespace
3400         $val =~ s/^\s+//;
3401         $val =~ s/\s+$//;
3402
3403         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
3404                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
3405 }
3406
3407 # convert config value to simple decimal number
3408 # an optional value suffix of 'k', 'm', or 'g' will cause the value
3409 # to be multiplied by 1024, 1048576, or 1073741824
3410 sub config_to_int {
3411         my $val = shift;
3412
3413         # strip leading and trailing whitespace
3414         $val =~ s/^\s+//;
3415         $val =~ s/\s+$//;
3416
3417         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
3418                 $unit = lc($unit);
3419                 # unknown unit is treated as 1
3420                 return $num * ($unit eq 'g' ? 1073741824 :
3421                                $unit eq 'm' ?    1048576 :
3422                                $unit eq 'k' ?       1024 : 1);
3423         }
3424         return $val;
3425 }
3426
3427 # convert config value to array reference, if needed
3428 sub config_to_multi {
3429         my $val = shift;
3430
3431         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
3432 }
3433
3434 sub git_get_project_config {
3435         my ($key, $type) = @_;
3436
3437         return unless defined $git_dir;
3438
3439         # key sanity check
3440         return unless ($key);
3441         # only subsection, if exists, is case sensitive,
3442         # and not lowercased by 'git config -z -l'
3443         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
3444                 $lo =~ s/_//g;
3445                 $key = join(".", lc($hi), $mi, lc($lo));
3446                 return if ($lo =~ /\W/ || $hi =~ /\W/);
3447         } else {
3448                 $key = lc($key);
3449                 $key =~ s/_//g;
3450                 return if ($key =~ /\W/);
3451         }
3452         $key =~ s/^gitweb\.//;
3453
3454         # type sanity check
3455         if (defined $type) {
3456                 $type =~ s/^--//;
3457                 $type = undef
3458                         unless ($type eq 'bool' || $type eq 'int');
3459         }
3460
3461         # get config
3462         if (!defined $config_file ||
3463             $config_file ne "$git_dir/config") {
3464                 %config = git_parse_project_config('gitweb');
3465                 $config_file = "$git_dir/config";
3466         }
3467
3468         # check if config variable (key) exists
3469         return unless exists $config{"gitweb.$key"};
3470
3471         # ensure given type
3472         if (!defined $type) {
3473                 return $config{"gitweb.$key"};
3474         } elsif ($type eq 'bool') {
3475                 # backward compatibility: 'git config --bool' returns true/false
3476                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
3477         } elsif ($type eq 'int') {
3478                 return config_to_int($config{"gitweb.$key"});
3479         }
3480         return $config{"gitweb.$key"};
3481 }
3482
3483 # get hash of given path at given ref
3484 sub git_get_hash_by_path {
3485         my $base = shift;
3486         my $path = shift || return undef;
3487         my $type = shift;
3488
3489         $path =~ s,/+$,,;
3490
3491         defined(my $fd = git_cmd_pipe "ls-tree", $base, "--", $path)
3492                 or die_error(500, "Open git-ls-tree failed");
3493         my $line = to_utf8(scalar <$fd>);
3494         close $fd or return undef;
3495
3496         if (!defined $line) {
3497                 # there is no tree or hash given by $path at $base
3498                 return undef;
3499         }
3500
3501         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3502         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
3503         if (defined $type && $type ne $2) {
3504                 # type doesn't match
3505                 return undef;
3506         }
3507         return $3;
3508 }
3509
3510 # get path of entry with given hash at given tree-ish (ref)
3511 # used to get 'from' filename for combined diff (merge commit) for renames
3512 sub git_get_path_by_hash {
3513         my $base = shift || return;
3514         my $hash = shift || return;
3515
3516         local $/ = "\0";
3517
3518         defined(my $fd = git_cmd_pipe "ls-tree", '-r', '-t', '-z', $base)
3519                 or return undef;
3520         while (my $line = to_utf8(scalar <$fd>)) {
3521                 chomp $line;
3522
3523                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
3524                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
3525                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
3526                         close $fd;
3527                         return $1;
3528                 }
3529         }
3530         close $fd;
3531         return undef;
3532 }
3533
3534 ## ......................................................................
3535 ## git utility functions, directly accessing git repository
3536
3537 # get the value of config variable either from file named as the variable
3538 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
3539 # configuration variable in the repository config file.
3540 sub git_get_file_or_project_config {
3541         my ($path, $name) = @_;
3542
3543         $git_dir = "$projectroot/$path";
3544         open my $fd, '<', "$git_dir/$name"
3545                 or return git_get_project_config($name);
3546         my $conf = to_utf8(scalar <$fd>);
3547         close $fd;
3548         if (defined $conf) {
3549                 chomp $conf;
3550         }
3551         return $conf;
3552 }
3553
3554 sub git_get_project_description {
3555         my $path = shift;
3556         return git_get_file_or_project_config($path, 'description');
3557 }
3558
3559 sub git_get_project_category {
3560         my $path = shift;
3561         return git_get_file_or_project_config($path, 'category');
3562 }
3563
3564
3565 # supported formats:
3566 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
3567 #   - if its contents is a number, use it as tag weight,
3568 #   - otherwise add a tag with weight 1
3569 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
3570 #   the same value multiple times increases tag weight
3571 # * `gitweb.ctag' multi-valued repo config variable
3572 sub git_get_project_ctags {
3573         my $project = shift;
3574         my $ctags = {};
3575
3576         $git_dir = "$projectroot/$project";
3577         if (opendir my $dh, "$git_dir/ctags") {
3578                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
3579                 foreach my $tagfile (@files) {
3580                         open my $ct, '<', $tagfile
3581                                 or next;
3582                         my $val = <$ct>;
3583                         chomp $val if $val;
3584                         close $ct;
3585
3586                         (my $ctag = $tagfile) =~ s#.*/##;
3587                         $ctag = to_utf8($ctag);
3588                         if ($val =~ /^\d+$/) {
3589                                 $ctags->{$ctag} = $val;
3590                         } else {
3591                                 $ctags->{$ctag} = 1;
3592                         }
3593                 }
3594                 closedir $dh;
3595
3596         } elsif (open my $fh, '<', "$git_dir/ctags") {
3597                 while (my $line = to_utf8(scalar <$fh>)) {
3598                         chomp $line;
3599                         $ctags->{$line}++ if $line;
3600                 }
3601                 close $fh;
3602
3603         } else {
3604                 my $taglist = config_to_multi(git_get_project_config('ctag'));
3605                 foreach my $tag (@$taglist) {
3606                         $ctags->{$tag}++;
3607                 }
3608         }
3609
3610         return $ctags;
3611 }
3612
3613 # return hash, where keys are content tags ('ctags'),
3614 # and values are sum of weights of given tag in every project
3615 sub git_gather_all_ctags {
3616         my $projects = shift;
3617         my $ctags = {};
3618
3619         foreach my $p (@$projects) {
3620                 foreach my $ct (keys %{$p->{'ctags'}}) {
3621                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
3622                 }
3623         }
3624
3625         return $ctags;
3626 }
3627
3628 sub git_populate_project_tagcloud {
3629         my ($ctags, $action) = @_;
3630
3631         # First, merge different-cased tags; tags vote on casing
3632         my %ctags_lc;
3633         foreach (keys %$ctags) {
3634                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3635                 if (not $ctags_lc{lc $_}->{topcount}
3636                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3637                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3638                         $ctags_lc{lc $_}->{topname} = $_;
3639                 }
3640         }
3641
3642         my $cloud;
3643         my $matched = $input_params{'ctag_filter'};
3644         if (eval { require HTML::TagCloud; 1; }) {
3645                 $cloud = HTML::TagCloud->new;
3646                 foreach my $ctag (sort keys %ctags_lc) {
3647                         # Pad the title with spaces so that the cloud looks
3648                         # less crammed.
3649                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3650                         $title =~ s/ /&#160;/g;
3651                         $title =~ s/^/&#160;/g;
3652                         $title =~ s/$/&#160;/g;
3653                         if (defined $matched && $matched eq $ctag) {
3654                                 $title = qq(<span class="match">$title</span>);
3655                         }
3656                         $cloud->add($title, href(-replay=>1, action=>$action, ctag_filter=>$ctag),
3657                                     $ctags_lc{$ctag}->{count});
3658                 }
3659         } else {
3660                 $cloud = {};
3661                 foreach my $ctag (keys %ctags_lc) {
3662                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3663                         if (defined $matched && $matched eq $ctag) {
3664                                 $title = qq(<span class="match">$title</span>);
3665                         }
3666                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3667                         $cloud->{$ctag}{ctag} =
3668                                 $cgi->a({-href=>href(-replay=>1, action=>$action, ctag_filter=>$ctag)}, $title);
3669                 }
3670         }
3671         return $cloud;
3672 }
3673
3674 sub git_show_project_tagcloud {
3675         my ($cloud, $count) = @_;
3676         if (ref $cloud eq 'HTML::TagCloud') {
3677                 return $cloud->html_and_css($count);
3678         } else {
3679                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3680                 return
3681                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3682                         join (', ', map {
3683                                 $cloud->{$_}->{'ctag'}
3684                         } splice(@tags, 0, $count)) .
3685                         '</div>';
3686         }
3687 }
3688
3689 sub git_get_project_url_list {
3690         my $path = shift;
3691
3692         $git_dir = "$projectroot/$path";
3693         open my $fd, '<', "$git_dir/cloneurl"
3694                 or return wantarray ?
3695                 @{ config_to_multi(git_get_project_config('url')) } :
3696                    config_to_multi(git_get_project_config('url'));
3697         my @git_project_url_list = map { chomp; to_utf8($_) } <$fd>;
3698         close $fd;
3699
3700         return wantarray ? @git_project_url_list : \@git_project_url_list;
3701 }
3702
3703 sub git_get_projects_list {
3704         my $filter = shift || '';
3705         my $paranoid = shift;
3706         my @list;
3707
3708         if (-d $projects_list) {
3709                 # search in directory
3710                 my $dir = $projects_list;
3711                 # remove the trailing "/"
3712                 $dir =~ s!/+$!!;
3713                 my $pfxlen = length("$dir");
3714                 my $pfxdepth = ($dir =~ tr!/!!);
3715                 # when filtering, search only given subdirectory
3716                 if ($filter && !$paranoid) {
3717                         $dir .= "/$filter";
3718                         $dir =~ s!/+$!!;
3719                 }
3720
3721                 File::Find::find({
3722                         follow_fast => 1, # follow symbolic links
3723                         follow_skip => 2, # ignore duplicates
3724                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3725                         wanted => sub {
3726                                 # global variables
3727                                 our $project_maxdepth;
3728                                 our $projectroot;
3729                                 # skip project-list toplevel, if we get it.
3730                                 return if (m!^[/.]$!);
3731                                 # only directories can be git repositories
3732                                 return unless (-d $_);
3733                                 # don't traverse too deep (Find is super slow on os x)
3734                                 # $project_maxdepth excludes depth of $projectroot
3735                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3736                                         $File::Find::prune = 1;
3737                                         return;
3738                                 }
3739
3740                                 my $path = substr($File::Find::name, $pfxlen + 1);
3741                                 # paranoidly only filter here
3742                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3743                                         next;
3744                                 }
3745                                 # we check related file in $projectroot
3746                                 if (check_export_ok("$projectroot/$path")) {
3747                                         push @list, { path => $path };
3748                                         $File::Find::prune = 1;
3749                                 }
3750                         },
3751                 }, "$dir");
3752
3753         } elsif (-f $projects_list) {
3754                 # read from file(url-encoded):
3755                 # 'git%2Fgit.git Linus+Torvalds'
3756                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3757                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3758                 open my $fd, '<', $projects_list or return;
3759         PROJECT:
3760                 while (my $line = <$fd>) {
3761                         chomp $line;
3762                         my ($path, $owner) = split ' ', $line;
3763                         $path = unescape($path);
3764                         $owner = unescape($owner);
3765                         if (!defined $path) {
3766                                 next;
3767                         }
3768                         # if $filter is rpovided, check if $path begins with $filter
3769                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3770                                 next;
3771                         }
3772                         if (check_export_ok("$projectroot/$path")) {
3773                                 my $pr = {
3774                                         path => $path
3775                                 };
3776                                 if ($owner) {
3777                                         $pr->{'owner'} = to_utf8($owner);
3778                                 }
3779                                 push @list, $pr;
3780                         }
3781                 }
3782                 close $fd;
3783         }
3784         return @list;
3785 }
3786
3787 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3788 # as side effects it sets 'forks' field to list of forks for forked projects
3789 sub filter_forks_from_projects_list {
3790         my $projects = shift;
3791
3792         my %trie; # prefix tree of directories (path components)
3793         # generate trie out of those directories that might contain forks
3794         foreach my $pr (@$projects) {
3795                 my $path = $pr->{'path'};
3796                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3797                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3798                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3799                 next unless (-d "$projectroot/$path"); # containing directory exists
3800                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3801
3802                 # add to trie
3803                 my @dirs = split('/', $path);
3804                 # walk the trie, until either runs out of components or out of trie
3805                 my $ref = \%trie;
3806                 while (scalar @dirs &&
3807                        exists($ref->{$dirs[0]})) {
3808                         $ref = $ref->{shift @dirs};
3809                 }
3810                 # create rest of trie structure from rest of components
3811                 foreach my $dir (@dirs) {
3812                         $ref = $ref->{$dir} = {};
3813                 }
3814                 # create end marker, store $pr as a data
3815                 $ref->{''} = $pr if (!exists $ref->{''});
3816         }
3817
3818         # filter out forks, by finding shortest prefix match for paths
3819         my @filtered;
3820  PROJECT:
3821         foreach my $pr (@$projects) {
3822                 # trie lookup
3823                 my $ref = \%trie;
3824         DIR:
3825                 foreach my $dir (split('/', $pr->{'path'})) {
3826                         if (exists $ref->{''}) {
3827                                 # found [shortest] prefix, is a fork - skip it
3828                                 push @{$ref->{''}{'forks'}}, $pr;
3829                                 next PROJECT;
3830                         }
3831                         if (!exists $ref->{$dir}) {
3832                                 # not in trie, cannot have prefix, not a fork
3833                                 push @filtered, $pr;
3834                                 next PROJECT;
3835                         }
3836                         # If the dir is there, we just walk one step down the trie.
3837                         $ref = $ref->{$dir};
3838                 }
3839                 # we ran out of trie
3840                 # (shouldn't happen: it's either no match, or end marker)
3841                 push @filtered, $pr;
3842         }
3843
3844         return @filtered;
3845 }
3846
3847 # note: fill_project_list_info must be run first,
3848 # for 'descr_long' and 'ctags' to be filled
3849 sub search_projects_list {
3850         my ($projlist, %opts) = @_;
3851         my $tagfilter  = $opts{'tagfilter'};
3852         my $search_re = $opts{'search_regexp'};
3853
3854         return @$projlist
3855                 unless ($tagfilter || $search_re);
3856
3857         # searching projects require filling to be run before it;
3858         fill_project_list_info($projlist,
3859                                $tagfilter  ? 'ctags' : (),
3860                                $search_re ? ('path', 'descr') : ());
3861         my @projects;
3862  PROJECT:
3863         foreach my $pr (@$projlist) {
3864
3865                 if ($tagfilter) {
3866                         next unless ref($pr->{'ctags'}) eq 'HASH';
3867                         next unless
3868                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3869                 }
3870
3871                 if ($search_re) {
3872                         my $path = $pr->{'path'};
3873                         $path =~ s/\.git$//; # should not be included in search
3874                         next unless
3875                                 $path =~ /$search_re/ ||
3876                                 $pr->{'descr_long'} =~ /$search_re/;
3877                 }
3878
3879                 push @projects, $pr;
3880         }
3881
3882         return @projects;
3883 }
3884
3885 our $gitweb_project_owner = undef;
3886 sub git_get_project_list_from_file {
3887
3888         return if (defined $gitweb_project_owner);
3889
3890         $gitweb_project_owner = {};
3891         # read from file (url-encoded):
3892         # 'git%2Fgit.git Linus+Torvalds'
3893         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3894         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3895         if (-f $projects_list) {
3896                 open(my $fd, '<', $projects_list);
3897                 while (my $line = <$fd>) {
3898                         chomp $line;
3899                         my ($pr, $ow) = split ' ', $line;
3900                         $pr = unescape($pr);
3901                         $ow = unescape($ow);
3902                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3903                 }
3904                 close $fd;
3905         }
3906 }
3907
3908 sub git_get_project_owner {
3909         my $proj = shift;
3910         my $owner;
3911
3912         return undef unless $proj;
3913         $git_dir = "$projectroot/$proj";
3914
3915         if (defined $project && $proj eq $project) {
3916                 $owner = git_get_project_config('owner');
3917         }
3918         if (!defined $owner && !defined $gitweb_project_owner) {
3919                 git_get_project_list_from_file();
3920         }
3921         if (!defined $owner && exists $gitweb_project_owner->{$proj}) {
3922                 $owner = $gitweb_project_owner->{$proj};
3923         }
3924         if (!defined $owner && (!defined $project || $proj ne $project)) {
3925                 $owner = git_get_project_config('owner');
3926         }
3927         if (!defined $owner) {
3928                 $owner = get_file_owner("$git_dir");
3929         }
3930
3931         return $owner;
3932 }
3933
3934 sub parse_activity_date {
3935         my $dstr = shift;
3936
3937         if ($dstr =~ /^\s*([-+]?\d+)(?:\s+([-+]\d{4}))?\s*$/) {
3938                 # Unix timestamp
3939                 return 0 + $1;
3940         }
3941         if ($dstr =~ /^\s*(\d{4})-(\d{2})-(\d{2})[Tt _](\d{1,2}):(\d{2}):(\d{2})(?:[ _]?([Zz]|(?:[-+]\d{1,2}:?\d{2})))?\s*$/) {
3942                 my ($Y,$m,$d,$H,$M,$S,$z) = ($1,$2,$3,$4,$5,$6,$7||'');
3943                 my $seconds = timegm(0+$S, 0+$M, 0+$H, 0+$d, $m-1, $Y-1900);
3944                 defined($z) && $z ne '' or $z = 'Z';
3945                 $z =~ s/://;
3946                 substr($z,1,0) = '0' if length($z) == 4;
3947                 my $off = 0;
3948                 if (uc($z) ne 'Z') {
3949                         $off = 60 * (60 * (0+substr($z,1,2)) + (0+substr($z,3,2)));
3950                         $off = -$off if substr($z,0,1) eq '-';
3951                 }
3952                 return $seconds - $off;
3953         }
3954         return undef;
3955 }
3956
3957 # If $quick is true only look at $lastactivity_file
3958 sub git_get_last_activity {
3959         my ($path, $quick) = @_;
3960         my $fd;
3961
3962         $git_dir = "$projectroot/$path";
3963         if ($lastactivity_file && open($fd, "<", "$git_dir/$lastactivity_file")) {
3964                 my $activity = <$fd>;
3965                 close $fd;
3966                 return (undef) unless defined $activity;
3967                 chomp $activity;
3968                 return (undef) if $activity eq '';
3969                 if (my $timestamp = parse_activity_date($activity)) {
3970                         return ($timestamp);
3971                 }
3972         }
3973         return (undef) if $quick;
3974         defined($fd = git_cmd_pipe 'for-each-ref',
3975              '--format=%(committer)',
3976              '--sort=-committerdate',
3977              '--count=1',
3978              map { "refs/$_" } get_branch_refs ()) or return;
3979         my $most_recent = <$fd>;
3980         close $fd or return (undef);
3981         if (defined $most_recent &&
3982             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3983                 my $timestamp = $1;
3984                 return ($timestamp);
3985         }
3986         return (undef);
3987 }
3988
3989 # Implementation note: when a single remote is wanted, we cannot use 'git
3990 # remote show -n' because that command always work (assuming it's a remote URL
3991 # if it's not defined), and we cannot use 'git remote show' because that would
3992 # try to make a network roundtrip. So the only way to find if that particular
3993 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3994 # and when we find what we want.
3995 sub git_get_remotes_list {
3996         my $wanted = shift;
3997         my %remotes = ();
3998
3999         my $fd = git_cmd_pipe 'remote', '-v';
4000         return unless $fd;
4001         while (my $remote = to_utf8(scalar <$fd>)) {
4002                 chomp $remote;
4003                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
4004                 next if $wanted and not $remote eq $wanted;
4005                 my ($url, $key) = ($1, $2);
4006
4007                 $remotes{$remote} ||= { 'heads' => [] };
4008                 $remotes{$remote}{$key} = $url;
4009         }
4010         close $fd or return;
4011         return wantarray ? %remotes : \%remotes;
4012 }
4013
4014 # Takes a hash of remotes as first parameter and fills it by adding the
4015 # available remote heads for each of the indicated remotes.
4016 sub fill_remote_heads {
4017         my $remotes = shift;
4018         my @heads = map { "remotes/$_" } keys %$remotes;
4019         my @remoteheads = git_get_heads_list(undef, @heads);
4020         foreach my $remote (keys %$remotes) {
4021                 $remotes->{$remote}{'heads'} = [ grep {
4022                         $_->{'name'} =~ s!^$remote/!!
4023                         } @remoteheads ];
4024         }
4025 }
4026
4027 sub git_get_references {
4028         my $type = shift || "";
4029         my %refs;
4030         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
4031         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
4032         defined(my $fd = git_cmd_pipe "show-ref", "--dereference",
4033                 ($type ? ("--", "refs/$type") : ())) # use -- <pattern> if $type
4034                 or return;
4035
4036         while (my $line = to_utf8(scalar <$fd>)) {
4037                 chomp $line;
4038                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
4039                         if (defined $refs{$1}) {
4040                                 push @{$refs{$1}}, $2;
4041                         } else {
4042                                 $refs{$1} = [ $2 ];
4043                         }
4044                 }
4045         }
4046         close $fd or return;
4047         return \%refs;
4048 }
4049
4050 sub git_get_rev_name_tags {
4051         my $hash = shift || return undef;
4052
4053         defined(my $fd = git_cmd_pipe "name-rev", "--tags", $hash)
4054                 or return;
4055         my $name_rev = to_utf8(scalar <$fd>);
4056         close $fd;
4057
4058         if ($name_rev =~ m|^$hash tags/(.*)$|) {
4059                 return $1;
4060         } else {
4061                 # catches also '$hash undefined' output
4062                 return undef;
4063         }
4064 }
4065
4066 ## ----------------------------------------------------------------------
4067 ## parse to hash functions
4068
4069 sub parse_date {
4070         my $epoch = shift;
4071         my $tz = shift || "-0000";
4072
4073         my %date;
4074         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
4075         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
4076         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
4077         $date{'hour'} = $hour;
4078         $date{'minute'} = $min;
4079         $date{'mday'} = $mday;
4080         $date{'day'} = $days[$wday];
4081         $date{'month'} = $months[$mon];
4082         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
4083                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
4084         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
4085                              $mday, $months[$mon], $hour ,$min;
4086         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
4087                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
4088
4089         my ($tz_sign, $tz_hour, $tz_min) =
4090                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
4091         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
4092         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
4093         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
4094         $date{'hour_local'} = $hour;
4095         $date{'minute_local'} = $min;
4096         $date{'mday_local'} = $mday;
4097         $date{'tz_local'} = $tz;
4098         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
4099                                   1900+$year, $mon+1, $mday,
4100                                   $hour, $min, $sec, $tz);
4101         return %date;
4102 }
4103
4104 my %parse_date_rfc2822_month_names;
4105 BEGIN {
4106         %parse_date_rfc2822_month_names = (
4107                 jan => 0, feb => 1, mar => 2, apr => 3, may => 4, jun => 5,
4108                 jul => 6, aug => 7, sep => 8, oct => 9, nov => 10, dec => 11
4109         );
4110 }
4111
4112 sub parse_date_rfc2822 {
4113         my $datestr = shift;
4114         return () unless defined $datestr;
4115         $datestr = $1 if $datestr =~/^[^\s]+,\s*(.*)$/;
4116         return () unless $datestr =~
4117                 /^\s*(\d{1,2})\s+([A-Za-z]{3})\s+(\d{4})\s+(\d{1,2}):(\d{2}):(\d{2})\s+([+-]\d{4})\s*$/;
4118         my ($d,$b,$Y,$H,$M,$S,$z) = ($1,$2,$3,$4,$5,$6,$7);
4119         my $m = $parse_date_rfc2822_month_names{lc($b)};
4120         return () unless defined($m);
4121         my $seconds = timegm(0+$S, 0+$M, 0+$H, 0+$d, 0+$m, $Y-1900);
4122         my $tzoffset = 60 * (60 * (0+substr($z,1,2)) + (0+substr($z,3,2)));
4123         $tzoffset = -$tzoffset if substr($z,0,1) eq '-';
4124         my $tzstring;
4125         if ($tzoffset >= 0) {
4126                 $tzstring = sprintf('+%02d%02d', int($tzoffset / 3600), int(($tzoffset % 3600) / 60));
4127         } else {
4128                 $tzstring = sprintf('-%02d%02d', int(-$tzoffset / 3600), int((-$tzoffset % 3600) / 60));
4129         }
4130         return parse_date($seconds - $tzoffset, $tzstring);
4131 }
4132
4133 sub parse_tag {
4134         my $tag_id = shift;
4135         my %tag;
4136         my @comment;
4137
4138         defined(my $fd = git_cmd_pipe "cat-file", "tag", $tag_id) or return;
4139         $tag{'id'} = $tag_id;
4140         while (my $line = to_utf8(scalar <$fd>)) {
4141                 chomp $line;
4142                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
4143                         $tag{'object'} = $1;
4144                 } elsif ($line =~ m/^type (.+)$/) {
4145                         $tag{'type'} = $1;
4146                 } elsif ($line =~ m/^tag (.+)$/) {
4147                         $tag{'name'} = $1;
4148                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
4149                         $tag{'author'} = $1;
4150                         $tag{'author_epoch'} = $2;
4151                         $tag{'author_tz'} = $3;
4152                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
4153                                 $tag{'author_name'}  = $1;
4154                                 $tag{'author_email'} = $2;
4155                         } else {
4156                                 $tag{'author_name'} = $tag{'author'};
4157                         }
4158                 } elsif ($line =~ m/--BEGIN/) {
4159                         push @comment, $line;
4160                         last;
4161                 } elsif ($line eq "") {
4162                         last;
4163                 }
4164         }
4165         push @comment, map(to_utf8($_), <$fd>);
4166         $tag{'comment'} = \@comment;
4167         close $fd or return;
4168         if (!defined $tag{'name'}) {
4169                 return
4170         };
4171         return %tag
4172 }
4173
4174 sub parse_commit_text {
4175         my ($commit_text, $withparents) = @_;
4176         my @commit_lines = split '\n', $commit_text;
4177         my %co;
4178
4179         pop @commit_lines; # Remove '\0'
4180
4181         if (! @commit_lines) {
4182                 return;
4183         }
4184
4185         my $header = shift @commit_lines;
4186         if ($header !~ m/^[0-9a-fA-F]{40}/) {
4187                 return;
4188         }
4189         ($co{'id'}, my @parents) = split ' ', $header;
4190         while (my $line = shift @commit_lines) {
4191                 last if $line eq "\n";
4192                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
4193                         $co{'tree'} = $1;
4194                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
4195                         push @parents, $1;
4196                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
4197                         $co{'author'} = to_utf8($1);
4198                         $co{'author_epoch'} = $2;
4199                         $co{'author_tz'} = $3;
4200                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
4201                                 $co{'author_name'}  = $1;
4202                                 $co{'author_email'} = $2;
4203                         } else {
4204                                 $co{'author_name'} = $co{'author'};
4205                         }
4206                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
4207                         $co{'committer'} = to_utf8($1);
4208                         $co{'committer_epoch'} = $2;
4209                         $co{'committer_tz'} = $3;
4210                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
4211                                 $co{'committer_name'}  = $1;
4212                                 $co{'committer_email'} = $2;
4213                         } else {
4214                                 $co{'committer_name'} = $co{'committer'};
4215                         }
4216                 }
4217         }
4218         if (!defined $co{'tree'}) {
4219                 return;
4220         };
4221         $co{'parents'} = \@parents;
4222         $co{'parent'} = $parents[0];
4223
4224         @commit_lines = map to_utf8($_), @commit_lines;
4225         foreach my $title (@commit_lines) {
4226                 $title =~ s/^    //;
4227                 if ($title ne "") {
4228                         $co{'title'} = chop_str($title, 80, 5);
4229                         # remove leading stuff of merges to make the interesting part visible
4230                         if (length($title) > 50) {
4231                                 $title =~ s/^Automatic //;
4232                                 $title =~ s/^merge (of|with) /Merge ... /i;
4233                                 if (length($title) > 50) {
4234                                         $title =~ s/(http|rsync):\/\///;
4235                                 }
4236                                 if (length($title) > 50) {
4237                                         $title =~ s/(master|www|rsync)\.//;
4238                                 }
4239                                 if (length($title) > 50) {
4240                                         $title =~ s/kernel.org:?//;
4241                                 }
4242                                 if (length($title) > 50) {
4243                                         $title =~ s/\/pub\/scm//;
4244                                 }
4245                         }
4246                         $co{'title_short'} = chop_str($title, 50, 5);
4247                         last;
4248                 }
4249         }
4250         if (! defined $co{'title'} || $co{'title'} eq "") {
4251                 $co{'title'} = $co{'title_short'} = '(no commit message)';
4252         }
4253         # remove added spaces
4254         foreach my $line (@commit_lines) {
4255                 $line =~ s/^    //;
4256         }
4257         $co{'comment'} = \@commit_lines;
4258
4259         my $age_epoch = $co{'committer_epoch'};
4260         $co{'age_epoch'} = $age_epoch;
4261         my $time_now = time;
4262         $co{'age_string'} = age_string($age_epoch, $time_now);
4263         $co{'age_string_date'} = age_string_date($age_epoch, $time_now);
4264         $co{'age_string_age'} = age_string_age($age_epoch, $time_now);
4265         return %co;
4266 }
4267
4268 sub parse_commit {
4269         my ($commit_id) = @_;
4270         my %co;
4271
4272         local $/ = "\0";
4273
4274         defined(my $fd = git_cmd_pipe "rev-list",
4275                 "--parents",
4276                 "--header",
4277                 "--max-count=1",
4278                 $commit_id,
4279                 "--")
4280                 or die_error(500, "Open git-rev-list failed");
4281         %co = parse_commit_text(<$fd>, 1);
4282         close $fd;
4283
4284         return %co;
4285 }
4286
4287 sub parse_commits {
4288         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
4289         my @cos;
4290
4291         $maxcount ||= 1;
4292         $skip ||= 0;
4293
4294         local $/ = "\0";
4295
4296         defined(my $fd = git_cmd_pipe "rev-list",
4297                 "--header",
4298                 @args,
4299                 ("--max-count=" . $maxcount),
4300                 ("--skip=" . $skip),
4301                 @extra_options,
4302                 $commit_id,
4303                 "--",
4304                 ($filename ? ($filename) : ()))
4305                 or die_error(500, "Open git-rev-list failed");
4306         while (my $line = <$fd>) {
4307                 my %co = parse_commit_text($line);
4308                 push @cos, \%co;
4309         }
4310         close $fd;
4311
4312         return wantarray ? @cos : \@cos;
4313 }
4314
4315 # parse line of git-diff-tree "raw" output
4316 sub parse_difftree_raw_line {
4317         my $line = shift;
4318         my %res;
4319
4320         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
4321         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
4322         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
4323                 $res{'from_mode'} = $1;
4324                 $res{'to_mode'} = $2;
4325                 $res{'from_id'} = $3;
4326                 $res{'to_id'} = $4;
4327                 $res{'status'} = $5;
4328                 $res{'similarity'} = $6;
4329                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
4330                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
4331                 } else {
4332                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
4333                 }
4334         }
4335         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
4336         # combined diff (for merge commit)
4337         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
4338                 $res{'nparents'}  = length($1);
4339                 $res{'from_mode'} = [ split(' ', $2) ];
4340                 $res{'to_mode'} = pop @{$res{'from_mode'}};
4341                 $res{'from_id'} = [ split(' ', $3) ];
4342                 $res{'to_id'} = pop @{$res{'from_id'}};
4343                 $res{'status'} = [ split('', $4) ];
4344                 $res{'to_file'} = unquote($5);
4345         }
4346         # 'c512b523472485aef4fff9e57b229d9d243c967f'
4347         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
4348                 $res{'commit'} = $1;
4349         }
4350
4351         return wantarray ? %res : \%res;
4352 }
4353
4354 # wrapper: return parsed line of git-diff-tree "raw" output
4355 # (the argument might be raw line, or parsed info)
4356 sub parsed_difftree_line {
4357         my $line_or_ref = shift;
4358
4359         if (ref($line_or_ref) eq "HASH") {
4360                 # pre-parsed (or generated by hand)
4361                 return $line_or_ref;
4362         } else {
4363                 return parse_difftree_raw_line($line_or_ref);
4364         }
4365 }
4366
4367 # parse line of git-ls-tree output
4368 sub parse_ls_tree_line {
4369         my $line = shift;
4370         my %opts = @_;
4371         my %res;
4372
4373         if ($opts{'-l'}) {
4374                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
4375                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
4376
4377                 $res{'mode'} = $1;
4378                 $res{'type'} = $2;
4379                 $res{'hash'} = $3;
4380                 $res{'size'} = $4;
4381                 if ($opts{'-z'}) {
4382                         $res{'name'} = $5;
4383                 } else {
4384                         $res{'name'} = unquote($5);
4385                 }
4386         } else {
4387                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4388                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
4389
4390                 $res{'mode'} = $1;
4391                 $res{'type'} = $2;
4392                 $res{'hash'} = $3;
4393                 if ($opts{'-z'}) {
4394                         $res{'name'} = $4;
4395                 } else {
4396                         $res{'name'} = unquote($4);
4397                 }
4398         }
4399
4400         return wantarray ? %res : \%res;
4401 }
4402
4403 # generates _two_ hashes, references to which are passed as 2 and 3 argument
4404 sub parse_from_to_diffinfo {
4405         my ($diffinfo, $from, $to, @parents) = @_;
4406
4407         if ($diffinfo->{'nparents'}) {
4408                 # combined diff
4409                 $from->{'file'} = [];
4410                 $from->{'href'} = [];
4411                 fill_from_file_info($diffinfo, @parents)
4412                         unless exists $diffinfo->{'from_file'};
4413                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
4414                         $from->{'file'}[$i] =
4415                                 defined $diffinfo->{'from_file'}[$i] ?
4416                                         $diffinfo->{'from_file'}[$i] :
4417                                         $diffinfo->{'to_file'};
4418                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
4419                                 $from->{'href'}[$i] = href(action=>"blob",
4420                                                            hash_base=>$parents[$i],
4421                                                            hash=>$diffinfo->{'from_id'}[$i],
4422                                                            file_name=>$from->{'file'}[$i]);
4423                         } else {
4424                                 $from->{'href'}[$i] = undef;
4425                         }
4426                 }
4427         } else {
4428                 # ordinary (not combined) diff
4429                 $from->{'file'} = $diffinfo->{'from_file'};
4430                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
4431                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
4432                                                hash=>$diffinfo->{'from_id'},
4433                                                file_name=>$from->{'file'});
4434                 } else {
4435                         delete $from->{'href'};
4436                 }
4437         }
4438
4439         $to->{'file'} = $diffinfo->{'to_file'};
4440         if (!is_deleted($diffinfo)) { # file exists in result
4441                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
4442                                      hash=>$diffinfo->{'to_id'},
4443                                      file_name=>$to->{'file'});
4444         } else {
4445                 delete $to->{'href'};
4446         }
4447 }
4448
4449 ## ......................................................................
4450 ## parse to array of hashes functions
4451
4452 sub git_get_heads_list {
4453         my ($limit, @classes) = @_;
4454         @classes = get_branch_refs() unless @classes;
4455         my @patterns = map { "refs/$_" } @classes;
4456         my @headslist;
4457
4458         defined(my $fd = git_cmd_pipe 'for-each-ref',
4459                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
4460                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
4461                 @patterns)
4462                 or return;
4463         while (my $line = to_utf8(scalar <$fd>)) {
4464                 my %ref_item;
4465
4466                 chomp $line;
4467                 my ($refinfo, $committerinfo) = split(/\0/, $line);
4468                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
4469                 my ($committer, $epoch, $tz) =
4470                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
4471                 $ref_item{'fullname'}  = $name;
4472                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
4473                 $name =~ s!^refs/($strip_refs|remotes)/!!;
4474                 $ref_item{'name'} = $name;
4475                 # for refs neither in 'heads' nor 'remotes' we want to
4476                 # show their ref dir
4477                 my $ref_dir = (defined $1) ? $1 : '';
4478                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
4479                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
4480                 }
4481
4482                 $ref_item{'id'}    = $hash;
4483                 $ref_item{'title'} = $title || '(no commit message)';
4484                 $ref_item{'epoch'} = $epoch;
4485                 if ($epoch) {
4486                         $ref_item{'age'} = age_string($ref_item{'epoch'});
4487                 } else {
4488                         $ref_item{'age'} = "unknown";
4489                 }
4490
4491                 push @headslist, \%ref_item;
4492         }
4493         close $fd;
4494
4495         return wantarray ? @headslist : \@headslist;
4496 }
4497
4498 sub git_get_tags_list {
4499         my $limit = shift;
4500         my @tagslist;
4501         my $all = shift || 0;
4502         my $order = shift || $default_refs_order;
4503         my $sortkey = $all && $order eq 'name' ? 'refname' : '-creatordate';
4504
4505         defined(my $fd = git_cmd_pipe 'for-each-ref',
4506                 ($limit ? '--count='.($limit+1) : ()), "--sort=$sortkey",
4507                 '--format=%(objectname) %(objecttype) %(refname) '.
4508                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
4509                 ($all ? 'refs' : 'refs/tags'))
4510                 or return;
4511         while (my $line = to_utf8(scalar <$fd>)) {
4512                 my %ref_item;
4513
4514                 chomp $line;
4515                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
4516                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
4517                 my ($creator, $epoch, $tz) =
4518                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
4519                 $ref_item{'fullname'} = $name;
4520                 $name =~ s!^refs/!! if $all;
4521                 $name =~ s!^refs/tags/!! unless $all;
4522
4523                 $ref_item{'type'} = $type;
4524                 $ref_item{'id'} = $id;
4525                 $ref_item{'name'} = $name;
4526                 if ($type eq "tag") {
4527                         $ref_item{'subject'} = $title;
4528                         $ref_item{'reftype'} = $reftype;
4529                         $ref_item{'refid'}   = $refid;
4530                 } else {
4531                         $ref_item{'reftype'} = $type;
4532                         $ref_item{'refid'}   = $id;
4533                 }
4534
4535                 if ($type eq "tag" || $type eq "commit") {
4536                         $ref_item{'epoch'} = $epoch;
4537                         if ($epoch) {
4538                                 $ref_item{'age'} = age_string($ref_item{'epoch'});
4539                         } else {
4540                                 $ref_item{'age'} = "unknown";
4541                         }
4542                 }
4543
4544                 push @tagslist, \%ref_item;
4545         }
4546         close $fd;
4547
4548         return wantarray ? @tagslist : \@tagslist;
4549 }
4550
4551 ## ----------------------------------------------------------------------
4552 ## filesystem-related functions
4553
4554 sub get_file_owner {
4555         my $path = shift;
4556
4557         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
4558         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
4559         if (!defined $gcos) {
4560                 return undef;
4561         }
4562         my $owner = $gcos;
4563         $owner =~ s/[,;].*$//;
4564         return to_utf8($owner);
4565 }
4566
4567 # assume that file exists
4568 sub insert_file {
4569         my $filename = shift;
4570
4571         open my $fd, '<', $filename;
4572         while (<$fd>) {
4573                 print to_utf8($_);
4574         }
4575         close $fd;
4576 }
4577
4578 ## ......................................................................
4579 ## mimetype related functions
4580
4581 sub mimetype_guess_file {
4582         my $filename = shift;
4583         my $mimemap = shift;
4584         my $rawmode = shift;
4585         -r $mimemap or return undef;
4586
4587         my %mimemap;
4588         open(my $mh, '<', $mimemap) or return undef;
4589         while (<$mh>) {
4590                 next if m/^#/; # skip comments
4591                 my ($mimetype, @exts) = split(/\s+/);
4592                 foreach my $ext (@exts) {
4593                         $mimemap{$ext} = $mimetype;
4594                 }
4595         }
4596         close($mh);
4597
4598         my ($ext, $ans);
4599         $ext = $1 if $filename =~ /\.([^.]*)$/;
4600         $ans = $mimemap{$ext} if $ext;
4601         if (defined $ans) {
4602                 my $l = lc($ans);
4603                 $ans = 'text/html' if $l eq 'application/xhtml+xml';
4604                 if (!$rawmode) {
4605                         $ans = 'text/xml' if $l =~ m!^application/[^\s:;,=]+\+xml$! ||
4606                                              $l eq 'image/svg+xml' ||
4607                                              $l eq 'application/xml-dtd' ||
4608                                              $l eq 'application/xml-external-parsed-entity';
4609                 }
4610         }
4611         return $ans;
4612 }
4613
4614 sub mimetype_guess {
4615         my $filename = shift;
4616         my $rawmode = shift;
4617         my $mime;
4618         $filename =~ /\./ or return undef;
4619
4620         if ($mimetypes_file) {
4621                 my $file = $mimetypes_file;
4622                 if ($file !~ m!^/!) { # if it is relative path
4623                         # it is relative to project
4624                         $file = "$projectroot/$project/$file";
4625                 }
4626                 $mime = mimetype_guess_file($filename, $file, $rawmode);
4627         }
4628         $mime ||= mimetype_guess_file($filename, '/etc/mime.types', $rawmode);
4629         return $mime;
4630 }
4631
4632 sub blob_mimetype {
4633         my $fd = shift;
4634         my $filename = shift;
4635         my $rawmode = shift;
4636         my $mime;
4637
4638         # The -T/-B file operators produce the wrong result unless a perlio
4639         # layer is present when the file handle is a pipe that delivers less
4640         # than 512 bytes of data before reaching EOF.
4641         #
4642         # If we are running in a Perl that uses the stdio layer rather than the
4643         # unix+perlio layers we will end up adding a perlio layer on top of the
4644         # stdio layer and get a second level of buffering.  This is harmless
4645         # and it makes the -T/-B file operators work properly in all cases.
4646
4647         binmode $fd, ":perlio" or die_error(500, "Adding perlio layer failed")
4648                 unless grep /^perlio$/, PerlIO::get_layers($fd);
4649
4650         $mime = mimetype_guess($filename, $rawmode) if defined $filename;
4651
4652         if (!$mime && $filename) {
4653                 if ($filename =~ m/\.html?$/i) {
4654                         $mime = 'text/html';
4655                 } elsif ($filename =~ m/\.xht(?:ml)?$/i) {
4656                         $mime = 'text/html';
4657                 } elsif ($filename =~ m/\.te?xt?$/i) {
4658                         $mime = 'text/plain';
4659                 } elsif ($filename =~ m/\.(?:markdown|md)$/i) {
4660                         $mime = 'text/plain';
4661                 } elsif ($filename =~ m/\.png$/i) {
4662                         $mime = 'image/png';
4663                 } elsif ($filename =~ m/\.gif$/i) {
4664                         $mime = 'image/gif';
4665                 } elsif ($filename =~ m/\.jpe?g$/i) {
4666                         $mime = 'image/jpeg';
4667                 } elsif ($filename =~ m/\.svgz?$/i) {
4668                         $mime = 'image/svg+xml';
4669                 }
4670         }
4671
4672         # just in case
4673         return $default_blob_plain_mimetype || 'application/octet-stream' unless $fd || $mime;
4674
4675         $mime = -T $fd ? 'text/plain' : 'application/octet-stream' unless $mime;
4676
4677         return $mime;
4678 }
4679
4680 sub is_ascii {
4681         use bytes;
4682         my $data = shift;
4683         return scalar($data =~ /^[\x00-\x7f]*$/);
4684 }
4685
4686 sub is_valid_utf8 {
4687         my $data = shift;
4688         return utf8::decode($data);
4689 }
4690
4691 sub extract_html_charset {
4692         return undef unless $_[0] && "$_[0]</head>" =~ m#<head(?:\s+[^>]*)?(?<!/)>(.*?)</head\s*>#is;
4693         my $head = $1;
4694         return $2 if $head =~ m#<meta\s+charset\s*=\s*(['"])\s*([a-z0-9(:)_.+-]+)\s*\1\s*/?>#is;
4695         while ($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) {
4696                 my %kv = (lc($1) => $3, lc($4) => $6);
4697                 my ($he, $c) = (lc($kv{'http-equiv'}), $kv{'content'});
4698                 return $1 if $he && $c && $he eq 'content-type' &&
4699                         $c =~ m!\s*text/html\s*;\s*charset\s*=\s*([a-z0-9(:)_.+-]+)\s*$!is;
4700         }
4701         return undef;
4702 }
4703
4704 sub blob_contenttype {
4705         my ($fd, $file_name, $type) = @_;
4706
4707         $type ||= blob_mimetype($fd, $file_name, 1);
4708         return $type unless $type =~ m!^text/.+!i;
4709         my ($leader, $charset, $htmlcharset);
4710         if ($fd && read($fd, $leader, 32768)) {{
4711                 $charset='US-ASCII' if is_ascii($leader);
4712                 return ("$type; charset=UTF-8", $leader) if !$charset && is_valid_utf8($leader);
4713                 $charset='ISO-8859-1' unless $charset;
4714                 $htmlcharset = extract_html_charset($leader) if $type eq 'text/html';
4715                 if ($htmlcharset && $charset ne 'US-ASCII') {
4716                         $htmlcharset = undef if $htmlcharset =~ /^(?:utf-8|us-ascii)$/i
4717                 }
4718         }}
4719         return ("$type; charset=$htmlcharset", $leader) if $htmlcharset;
4720         my $defcharset = $default_text_plain_charset || '';
4721         $defcharset =~ s/^\s+//;
4722         $defcharset =~ s/\s+$//;
4723         $defcharset = '' if $charset && $charset ne 'US-ASCII' && $defcharset =~ /^(?:utf-8|us-ascii)$/i;
4724         return ("$type; charset=" . ($defcharset || 'ISO-8859-1'), $leader);
4725 }
4726
4727 # peek the first upto 128 bytes off a file handle
4728 sub peek128bytes {
4729         my $fd = shift;
4730
4731         use IO::Handle;
4732         use bytes;
4733
4734         my $prefix128;
4735         return '' unless $fd && read($fd, $prefix128, 128);
4736
4737         # In the general case, we're guaranteed only to be able to ungetc one
4738         # character (provided, of course, we actually got a character first).
4739         #
4740         # However, we know:
4741         #
4742         # 1) we are dealing with a :perlio layer since blob_mimetype will have
4743         #    already been called at least once on the file handle before us
4744         #
4745         # 2) we have an $fd positioned at the start of the input stream and
4746         #    therefore know we were positioned at a buffer boundary before
4747         #    reading the initial upto 128 bytes
4748         #
4749         # 3) the buffer size is at least 512 bytes
4750         #
4751         # 4) we are careful to only unget raw bytes
4752         #
4753         # 5) we are attempting to unget exactly the same number of bytes we got
4754         #
4755         # Given the above conditions we will ALWAYS be able to safely unget
4756         # the $prefix128 value we just got.
4757         #
4758         # In fact, we could read up to 511 bytes and still be sure.
4759         # (Reading 512 might pop us into the next internal buffer, but probably
4760         # not since that could break the always able to unget at least the one
4761         # you just got guarantee.)
4762
4763         map {$fd->ungetc(ord($_))} reverse(split //, $prefix128);
4764
4765         return $prefix128;
4766 }
4767
4768 # guess file syntax for syntax highlighting; return undef if no highlighting
4769 # the name of syntax can (in the future) depend on syntax highlighter used
4770 sub guess_file_syntax {
4771         my ($fd, $mimetype, $file_name) = @_;
4772         return undef unless $fd && defined $file_name &&
4773                 defined $mimetype && $mimetype =~ m!^text/.+!i;
4774         my $basename = basename($file_name, '.in');
4775         return $highlight_basename{$basename}
4776                 if exists $highlight_basename{$basename};
4777
4778         # Peek to see if there's a shebang or xml line.
4779         # We always operate on bytes when testing this.
4780         {
4781                 use bytes;
4782                 my $shebang = peek128bytes($fd);
4783                 if (length($shebang) >= 4 && $shebang =~ /^#!/) { # 4 would be '#!/x'
4784                         foreach my $key (keys %highlight_shebang) {
4785                                 my $ar = ref($highlight_shebang{$key}) ?
4786                                         $highlight_shebang{$key} :
4787                                         [$highlight_shebang{key}];
4788                                 map {return $key if $shebang =~ /$_/} @$ar;
4789                         }
4790                 }
4791                 return 'xml' if $shebang =~ m!^\s*<\?xml\s!; # "xml" must be lowercase
4792         }
4793
4794         $basename =~ /\.([^.]*)$/;
4795         my $ext = $1 or return undef;
4796         return $highlight_ext{$ext}
4797                 if exists $highlight_ext{$ext};
4798
4799         return undef;
4800 }
4801
4802 # run highlighter and return FD of its output,
4803 # or return original FD if no highlighting
4804 sub run_highlighter {
4805         my ($fd, $syntax) = @_;
4806         return $fd unless $fd && !eof($fd) && defined $highlight_bin && defined $syntax;
4807
4808         defined(my $hifd = cmd_pipe $posix_shell_bin, '-c',
4809                 quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
4810                 quote_command($highlight_bin).
4811                 " --replace-tabs=8 --fragment --syntax $syntax")
4812                 or die_error(500, "Couldn't open file or run syntax highlighter");
4813         if (eof $hifd) {
4814                 # just in case, should not happen as we tested !eof($fd) above
4815                 return $fd if close($hifd);
4816
4817                 # should not happen
4818                 !$! or die_error(500, "Couldn't close syntax highighter pipe");
4819
4820                 # leaving us with the only possibility a non-zero exit status (possibly a signal);
4821                 # instead of dying horribly on this, just skip the highlighting
4822                 # but do output a message about it to STDERR that will end up in the log
4823                 print STDERR "warning: skipping failed highlight for --syntax $syntax: ".
4824                         sprintf("child exit status 0x%x\n", $?);
4825                 return $fd
4826         }
4827         close $fd;
4828         return ($hifd, 1);
4829 }
4830
4831 ## ======================================================================
4832 ## functions printing HTML: header, footer, error page
4833
4834 sub get_page_title {
4835         my $title = to_utf8($site_name);
4836
4837         unless (defined $project) {
4838                 if (defined $project_filter) {
4839                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4840                 }
4841                 return $title;
4842         }
4843         $title .= " - " . to_utf8($project);
4844
4845         return $title unless (defined $action);
4846         my $action_print = $action eq 'blame_incremental' ? 'blame' : $action;
4847         $title .= "/$action_print"; # $action is US-ASCII (7bit ASCII)
4848
4849         return $title unless (defined $file_name);
4850         $title .= " - " . esc_path($file_name);
4851         if ($action eq "tree" && $file_name !~ m|/$|) {
4852                 $title .= "/";
4853         }
4854
4855         return $title;
4856 }
4857
4858 sub get_content_type_html {
4859         # We do not ever emit application/xhtml+xml since that gives us
4860         # no benefits and it makes many browsers (e.g. Firefox) exceedingly
4861         # strict, which is troublesome for example when showing user-supplied
4862         # README.html files.
4863         return 'text/html';
4864 }
4865
4866 sub print_feed_meta {
4867         if (defined $project) {
4868                 my %href_params = get_feed_info();
4869                 if (!exists $href_params{'-title'}) {
4870                         $href_params{'-title'} = 'log';
4871                 }
4872
4873                 foreach my $format (qw(RSS Atom)) {
4874                         my $type = lc($format);
4875                         my %link_attr = (
4876                                 '-rel' => 'alternate',
4877                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4878                                 '-type' => "application/$type+xml"
4879                         );
4880
4881                         $href_params{'extra_options'} = undef;
4882                         $href_params{'action'} = $type;
4883                         $link_attr{'-href'} = href(%href_params);
4884                         print "<link ".
4885                               "rel=\"$link_attr{'-rel'}\" ".
4886                               "title=\"$link_attr{'-title'}\" ".
4887                               "href=\"$link_attr{'-href'}\" ".
4888                               "type=\"$link_attr{'-type'}\" ".
4889                               "/>\n";
4890
4891                         $href_params{'extra_options'} = '--no-merges';
4892                         $link_attr{'-href'} = href(%href_params);
4893                         $link_attr{'-title'} .= ' (no merges)';
4894                         print "<link ".
4895                               "rel=\"$link_attr{'-rel'}\" ".
4896                               "title=\"$link_attr{'-title'}\" ".
4897                               "href=\"$link_attr{'-href'}\" ".
4898                               "type=\"$link_attr{'-type'}\" ".
4899                               "/>\n";
4900                 }
4901
4902         } else {
4903                 printf('<link rel="alternate" title="%s projects list" '.
4904                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4905                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4906                 printf('<link rel="alternate" title="%s projects feeds" '.
4907                        'href="%s" type="text/x-opml" />'."\n",
4908                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4909         }
4910 }
4911
4912 sub print_header_links {
4913         my $status = shift;
4914
4915         # print out each stylesheet that exist, providing backwards capability
4916         # for those people who defined $stylesheet in a config file
4917         if (defined $stylesheet) {
4918                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4919         } else {
4920                 foreach my $stylesheet (@stylesheets) {
4921                         next unless $stylesheet;
4922                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4923                 }
4924         }
4925         print_feed_meta()
4926                 if ($status eq '200 OK');
4927         if (defined $favicon) {
4928                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4929         }
4930 }
4931
4932 sub print_nav_breadcrumbs_path {
4933         my $dirprefix = undef;
4934         while (my $part = shift) {
4935                 $dirprefix .= "/" if defined $dirprefix;
4936                 $dirprefix .= $part;
4937                 print $cgi->a({-href => href(project => undef,
4938                                              project_filter => $dirprefix,
4939                                              action => "project_list")},
4940                               esc_html($part)) . " / ";
4941         }
4942 }
4943
4944 sub print_nav_breadcrumbs {
4945         my %opts = @_;
4946
4947         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4948                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4949         }
4950         if (defined $project) {
4951                 my @dirname = split '/', $project;
4952                 my $projectbasename = pop @dirname;
4953                 print_nav_breadcrumbs_path(@dirname);
4954                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4955                 if (defined $action) {
4956                         my $action_print = $action ;
4957                         $action_print = 'blame' if $action_print eq 'blame_incremental';
4958                         if (defined $opts{-action_extra}) {
4959                                 $action_print = $cgi->a({-href => href(action=>$action)},
4960                                         $action);
4961                         }
4962                         print " / $action_print";
4963                 }
4964                 if (defined $opts{-action_extra}) {
4965                         print " / $opts{-action_extra}";
4966                 }
4967                 print "\n";
4968         } elsif (defined $project_filter) {
4969                 print_nav_breadcrumbs_path(split '/', $project_filter);
4970         }
4971 }
4972
4973 sub print_search_form {
4974         if (!defined $searchtext) {
4975                 $searchtext = "";
4976         }
4977         my $search_hash;
4978         if (defined $hash_base) {
4979                 $search_hash = $hash_base;
4980         } elsif (defined $hash) {
4981                 $search_hash = $hash;
4982         } else {
4983                 $search_hash = "HEAD";
4984         }
4985         # We can't use href() here because we need to encode the
4986         # URL parameters into the form, not into the action link.
4987         my $action = $my_uri;
4988         my $use_pathinfo = gitweb_check_feature('pathinfo');
4989         if ($use_pathinfo) {
4990                 # See notes about doubled / in href()
4991                 $action =~ s,/$,,;
4992                 $action .= "/".esc_path_info($project);
4993         }
4994         print $cgi->start_form(-method => "get", -action => $action) .
4995               "<div class=\"search\">\n" .
4996               (!$use_pathinfo &&
4997               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4998               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4999               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
5000               $cgi->popup_menu(-name => 'st', -default => 'commit',
5001                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
5002               " " . $cgi->a({-href => href(action=>"search_help"),
5003                              -title => "search help" }, "?") . " search:\n",
5004               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
5005               "<span title=\"Extended regular expression\">" .
5006               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5007                              -checked => $search_use_regexp) .
5008               "</span>" .
5009               "</div>" .
5010               $cgi->end_form() . "\n";
5011 }
5012
5013 sub git_header_html {
5014         my $status = shift || "200 OK";
5015         my $expires = shift;
5016         my %opts = @_;
5017
5018         my $title = get_page_title();
5019         my $content_type = get_content_type_html();
5020         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
5021                            -status=> $status, -expires => $expires)
5022                 unless ($opts{'-no_http_header'});
5023         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
5024         print <<EOF;
5025 <?xml version="1.0" encoding="utf-8"?>
5026 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
5027 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
5028 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
5029 <!-- git core binaries version $git_version -->
5030 <head>
5031 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
5032 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
5033 <meta name="robots" content="index, nofollow"/>
5034 <title>$title</title>
5035 <script type="text/javascript">/* <![CDATA[ */
5036 function fixBlameLinks() {
5037         var allLinks = document.getElementsByTagName("a");
5038         for (var i = 0; i < allLinks.length; i++) {
5039                 var link = allLinks.item(i);
5040                 if (link.className == 'blamelink')
5041                         link.href = link.href.replace("/blame/", "/blame_incremental/");
5042         }
5043 }
5044 /* ]]> */</script>
5045 EOF
5046         # the stylesheet, favicon etc urls won't work correctly with path_info
5047         # unless we set the appropriate base URL
5048         if ($ENV{'PATH_INFO'}) {
5049                 print "<base href=\"".esc_url($base_url)."\" />\n";
5050         }
5051         print_header_links($status);
5052
5053         if (defined $site_html_head_string) {
5054                 print to_utf8($site_html_head_string);
5055         }
5056
5057         print "</head>\n" .
5058               "<body>\n";
5059
5060         if (defined $site_header && -f $site_header) {
5061                 insert_file($site_header);
5062         }
5063
5064         print "<div class=\"page_header\">\n";
5065         if (defined $logo) {
5066                 print $cgi->a({-href => esc_url($logo_url),
5067                                -title => $logo_label},
5068                               $cgi->img({-src => esc_url($logo),
5069                                          -width => 72, -height => 27,
5070                                          -alt => "git",
5071                                          -class => "logo"}));
5072         }
5073         print_nav_breadcrumbs(%opts);
5074         print "</div>\n";
5075
5076         my $have_search = gitweb_check_feature('search');
5077         if (defined $project && $have_search) {
5078                 print_search_form();
5079         }
5080 }
5081
5082 sub compute_timed_interval {
5083         return "<?gitweb compute_timed_interval?>" if $cache_mode_active;
5084         return tv_interval($t0, [ gettimeofday() ]);
5085 }
5086
5087 sub compute_commands_count {
5088         return "<?gitweb compute_commands_count?>" if $cache_mode_active;
5089         my $s = $number_of_git_cmds == 1 ? '' : 's';
5090         return '<span id="generating_cmd">'.
5091                 $number_of_git_cmds.
5092                 "</span> git command$s";
5093 }
5094
5095 sub git_footer_html {
5096         my $feed_class = 'rss_logo';
5097
5098         print "<div class=\"page_footer\">\n";
5099         if (defined $project) {
5100                 my $descr = git_get_project_description($project);
5101                 if (defined $descr) {
5102                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
5103                 }
5104
5105                 my %href_params = get_feed_info();
5106                 if (!%href_params) {
5107                         $feed_class .= ' generic';
5108                 }
5109                 $href_params{'-title'} ||= 'log';
5110
5111                 foreach my $format (qw(RSS Atom)) {
5112                         $href_params{'action'} = lc($format);
5113                         print $cgi->a({-href => href(%href_params),
5114                                       -title => "$href_params{'-title'} $format feed",
5115                                       -class => $feed_class}, $format)."\n";
5116                 }
5117
5118         } else {
5119                 print $cgi->a({-href => href(project=>undef, action=>"opml",
5120                                              project_filter => $project_filter),
5121                               -class => $feed_class}, "OPML") . " ";
5122                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
5123                                              project_filter => $project_filter),
5124                               -class => $feed_class}, "TXT") . "\n";
5125         }
5126         print "</div>\n"; # class="page_footer"
5127
5128         if (defined $t0 && gitweb_check_feature('timed')) {
5129                 print "<div id=\"generating_info\">\n";
5130                 print 'This page took '.
5131                       '<span id="generating_time" class="time_span">'.
5132                       compute_timed_interval().
5133                       ' seconds </span>'.
5134                       ' and '.
5135                       compute_commands_count().
5136                       " to generate.\n";
5137                 print "</div>\n"; # class="page_footer"
5138         }
5139
5140         if (defined $site_footer && -f $site_footer) {
5141                 insert_file($site_footer);
5142         }
5143
5144         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
5145         if (defined $action &&
5146             $action eq 'blame_incremental') {
5147                 print qq!<script type="text/javascript">\n!.
5148                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
5149                       qq!           "!. href() .qq!");\n!.
5150                       qq!</script>\n!;
5151         } else {
5152                 my ($jstimezone, $tz_cookie, $datetime_class) =
5153                         gitweb_get_feature('javascript-timezone');
5154
5155                 print qq!<script type="text/javascript">\n!.
5156                       qq!window.onload = function () {\n!;
5157                 if (gitweb_check_feature('blame_incremental')) {
5158                         print qq!       fixBlameLinks();\n!;
5159                 }
5160                 if (gitweb_check_feature('javascript-actions')) {
5161                         print qq!       fixLinks();\n!;
5162                 }
5163                 if ($jstimezone && $tz_cookie && $datetime_class) {
5164                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
5165                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
5166                 }
5167                 print qq!};\n!.
5168                       qq!</script>\n!;
5169         }
5170
5171         print "</body>\n" .
5172               "</html>";
5173 }
5174
5175 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
5176 # Example: die_error(404, 'Hash not found')
5177 # By convention, use the following status codes (as defined in RFC 2616):
5178 # 400: Invalid or missing CGI parameters, or
5179 #      requested object exists but has wrong type.
5180 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
5181 #      this server or project.
5182 # 404: Requested object/revision/project doesn't exist.
5183 # 500: The server isn't configured properly, or
5184 #      an internal error occurred (e.g. failed assertions caused by bugs), or
5185 #      an unknown error occurred (e.g. the git binary died unexpectedly).
5186 # 503: The server is currently unavailable (because it is overloaded,
5187 #      or down for maintenance).  Generally, this is a temporary state.
5188 sub die_error {
5189         my $status = shift || 500;
5190         my $error = esc_html(shift) || "Internal Server Error";
5191         my $extra = shift;
5192         my %opts = @_;
5193
5194         my %http_responses = (
5195                 400 => '400 Bad Request',
5196                 403 => '403 Forbidden',
5197                 404 => '404 Not Found',
5198                 500 => '500 Internal Server Error',
5199                 503 => '503 Service Unavailable',
5200         );
5201         git_header_html($http_responses{$status}, undef, %opts);
5202         print <<EOF;
5203 <div class="page_body">
5204 <br /><br />
5205 $status - $error
5206 <br />
5207 EOF
5208         if (defined $extra) {
5209                 print "<hr />\n" .
5210                       "$extra\n";
5211         }
5212         print "</div>\n";
5213
5214         git_footer_html();
5215         goto DONE_GITWEB
5216                 unless ($opts{'-error_handler'});
5217 }
5218
5219 ## ----------------------------------------------------------------------
5220 ## functions printing or outputting HTML: navigation
5221
5222 sub git_print_page_nav {
5223         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
5224         $extra = '' if !defined $extra; # pager or formats
5225
5226         my @navs = qw(summary log commit commitdiff tree refs);
5227         if ($suppress) {
5228                 @navs = grep { $_ ne $suppress } @navs;
5229         }
5230
5231         my %arg = map { $_ => {action=>$_} } @navs;
5232         if (defined $head) {
5233                 for (qw(commit commitdiff)) {
5234                         $arg{$_}{'hash'} = $head;
5235                 }
5236                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
5237                         $arg{'log'}{'hash'} = $head;
5238                 }
5239         }
5240
5241         $arg{'log'}{'action'} = 'shortlog';
5242         if ($current eq 'log') {
5243                 $current = 'shortlog';
5244         } elsif ($current eq 'shortlog') {
5245                 $current = 'log';
5246         }
5247         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
5248         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
5249
5250         my @actions = gitweb_get_feature('actions');
5251         my $escname = $project;
5252         $escname =~ s/[+]/%2B/g;
5253         my %repl = (
5254                 '%' => '%',
5255                 'n' => $project,         # project name
5256                 'f' => $git_dir,         # project path within filesystem
5257                 'h' => $treehead || '',  # current hash ('h' parameter)
5258                 'b' => $treebase || '',  # hash base ('hb' parameter)
5259                 'e' => $escname,         # project name with '+' escaped
5260         );
5261         while (@actions) {
5262                 my ($label, $link, $pos) = splice(@actions,0,3);
5263                 # insert
5264                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
5265                 # munch munch
5266                 $link =~ s/%([%nfhbe])/$repl{$1}/g;
5267                 $arg{$label}{'_href'} = $link;
5268         }
5269
5270         print "<div class=\"page_nav\">\n" .
5271                 (join " | ",
5272                  map { $_ eq $current ?
5273                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
5274                  } @navs);
5275         print "<br/>\n$extra<br/>\n" .
5276               "</div>\n";
5277 }
5278
5279 # returns a submenu for the nagivation of the refs views (tags, heads,
5280 # remotes) with the current view disabled and the remotes view only
5281 # available if the feature is enabled
5282 sub format_ref_views {
5283         my ($current) = @_;
5284         my @ref_views = qw{tags heads};
5285         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
5286         return join " | ", map {
5287                 $_ eq $current ? $_ :
5288                 $cgi->a({-href => href(action=>$_)}, $_)
5289         } @ref_views
5290 }
5291
5292 sub format_paging_nav {
5293         my ($action, $page, $has_next_link) = @_;
5294         my $paging_nav;
5295
5296
5297         if ($page > 0) {
5298                 $paging_nav .=
5299                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
5300                         " &#183; " .
5301                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5302                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5303         } else {
5304                 $paging_nav .= "first &#183; prev";
5305         }
5306
5307         if ($has_next_link) {
5308                 $paging_nav .= " &#183; " .
5309                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5310                                  -accesskey => "n", -title => "Alt-n"}, "next");
5311         } else {
5312                 $paging_nav .= " &#183; next";
5313         }
5314
5315         return $paging_nav;
5316 }
5317
5318 sub format_log_nav {
5319         my ($action, $page, $has_next_link) = @_;
5320         my $paging_nav;
5321
5322         if ($action eq 'shortlog') {
5323                 $paging_nav .= 'shortlog';
5324         } else {
5325                 $paging_nav .= $cgi->a({-href => href(action=>'shortlog', -replay=>1)}, 'shortlog');
5326         }
5327         $paging_nav .= ' | ';
5328         if ($action eq 'log') {
5329                 $paging_nav .= 'fulllog';
5330         } else {
5331                 $paging_nav .= $cgi->a({-href => href(action=>'log', -replay=>1)}, 'fulllog');
5332         }
5333
5334         $paging_nav .= " | " . format_paging_nav($action, $page, $has_next_link);
5335         return $paging_nav;
5336 }
5337
5338 ## ......................................................................
5339 ## functions printing or outputting HTML: div
5340
5341 sub git_print_header_div {
5342         my ($action, $title, $hash, $hash_base, $extra) = @_;
5343         my %args = ();
5344         defined $extra or $extra = '';
5345
5346         $args{'action'} = $action;
5347         $args{'hash'} = $hash if $hash;
5348         $args{'hash_base'} = $hash_base if $hash_base;
5349
5350         my $link1 = $cgi->a({-href => href(%args), -class => "title"},
5351                             $title ? $title : $action);
5352         my $link2 = $cgi->a({-href => href(%args), -class => "cover"}, "");
5353         print "<div class=\"header\">\n" . '<span class="title">' .
5354               $link1 . $extra . $link2 . '</span>' . "\n</div>\n";
5355 }
5356
5357 sub format_repo_url {
5358         my ($name, $url) = @_;
5359         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
5360 }
5361
5362 # Group output by placing it in a DIV element and adding a header.
5363 # Options for start_div() can be provided by passing a hash reference as the
5364 # first parameter to the function.
5365 # Options to git_print_header_div() can be provided by passing an array
5366 # reference. This must follow the options to start_div if they are present.
5367 # The content can be a scalar, which is output as-is, a scalar reference, which
5368 # is output after html escaping, an IO handle passed either as *handle or
5369 # *handle{IO}, or a function reference. In the latter case all following
5370 # parameters will be taken as argument to the content function call.
5371 sub git_print_section {
5372         my ($div_args, $header_args, $content);
5373         my $arg = shift;
5374         if (ref($arg) eq 'HASH') {
5375                 $div_args = $arg;
5376                 $arg = shift;
5377         }
5378         if (ref($arg) eq 'ARRAY') {
5379                 $header_args = $arg;
5380                 $arg = shift;
5381         }
5382         $content = $arg;
5383
5384         print $cgi->start_div($div_args);
5385         git_print_header_div(@$header_args);
5386
5387         if (ref($content) eq 'CODE') {
5388                 $content->(@_);
5389         } elsif (ref($content) eq 'SCALAR') {
5390                 print esc_html($$content);
5391         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
5392                 while (<$content>) {
5393                         print to_utf8($_);
5394                 }
5395         } elsif (!ref($content) && defined($content)) {
5396                 print $content;
5397         }
5398
5399         print $cgi->end_div;
5400 }
5401
5402 sub format_timestamp_html {
5403         my $date = shift;
5404         my $strtime = $date->{'rfc2822'};
5405
5406         my (undef, undef, $datetime_class) =
5407                 gitweb_get_feature('javascript-timezone');
5408         if ($datetime_class) {
5409                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
5410         }
5411
5412         my $localtime_format = '(%d %02d:%02d %s)';
5413         if ($date->{'hour_local'} < 6) {
5414                 $localtime_format = '(%d <span class="atnight">%02d:%02d</span> %s)';
5415         }
5416         $strtime .= ' ' .
5417                     sprintf($localtime_format, $date->{'mday_local'},
5418                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
5419
5420         return $strtime;
5421 }
5422
5423 # Outputs the author name and date in long form
5424 sub git_print_authorship {
5425         my $co = shift;
5426         my %opts = @_;
5427         my $tag = $opts{-tag} || 'div';
5428         my $author = $co->{'author_name'};
5429
5430         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
5431         print "<$tag class=\"author_date\">" .
5432               format_search_author($author, "author", esc_html($author)) .
5433               " [".format_timestamp_html(\%ad)."]".
5434               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
5435               "</$tag>\n";
5436 }
5437
5438 # Outputs table rows containing the full author or committer information,
5439 # in the format expected for 'commit' view (& similar).
5440 # Parameters are a commit hash reference, followed by the list of people
5441 # to output information for. If the list is empty it defaults to both
5442 # author and committer.
5443 sub git_print_authorship_rows {
5444         my $co = shift;
5445         # too bad we can't use @people = @_ || ('author', 'committer')
5446         my @people = @_;
5447         @people = ('author', 'committer') unless @people;
5448         foreach my $who (@people) {
5449                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
5450                 print "<tr><td>$who</td><td>" .
5451                       format_search_author($co->{"${who}_name"}, $who,
5452                                            esc_html($co->{"${who}_name"})) . " " .
5453                       format_search_author($co->{"${who}_email"}, $who,
5454                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
5455                       "</td><td rowspan=\"2\">" .
5456                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
5457                       "</td></tr>\n" .
5458                       "<tr>" .
5459                       "<td></td><td>" .
5460                       format_timestamp_html(\%wd) .
5461                       "</td>" .
5462                       "</tr>\n";
5463         }
5464 }
5465
5466 sub git_print_page_path {
5467         my $name = shift;
5468         my $type = shift;
5469         my $hb = shift;
5470
5471
5472         print "<div class=\"page_path\">";
5473         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
5474                       -title => 'tree root'}, to_utf8("[$project]"));
5475         print " / ";
5476         if (defined $name) {
5477                 my @dirname = split '/', $name;
5478                 my $basename = pop @dirname;
5479                 my $fullname = '';
5480
5481                 foreach my $dir (@dirname) {
5482                         $fullname .= ($fullname ? '/' : '') . $dir;
5483                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
5484                                                      hash_base=>$hb),
5485                                       -title => $fullname}, esc_path($dir));
5486                         print " / ";
5487                 }
5488                 if (defined $type && $type eq 'blob') {
5489                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
5490                                                      hash_base=>$hb),
5491                                       -title => $name}, esc_path($basename));
5492                 } elsif (defined $type && $type eq 'tree') {
5493                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
5494                                                      hash_base=>$hb),
5495                                       -title => $name}, esc_path($basename));
5496                         print " / ";
5497                 } else {
5498                         print esc_path($basename);
5499                 }
5500         }
5501         print "<br/></div>\n";
5502 }
5503
5504 sub git_print_log {
5505         my $log = shift;
5506         my %opts = @_;
5507
5508         if ($opts{'-remove_title'}) {
5509                 # remove title, i.e. first line of log
5510                 shift @$log;
5511         }
5512         # remove leading empty lines
5513         while (defined $log->[0] && $log->[0] eq "") {
5514                 shift @$log;
5515         }
5516
5517         # print log
5518         my $skip_blank_line = 0;
5519         foreach my $line (@$log) {
5520                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
5521                         if (! $opts{'-remove_signoff'}) {
5522                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
5523                                 $skip_blank_line = 1;
5524                         }
5525                         next;
5526                 }
5527
5528                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
5529                         if (! $opts{'-remove_signoff'}) {
5530                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
5531                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
5532                                         "</span><br/>\n";
5533                                 $skip_blank_line = 1;
5534                         }
5535                         next;
5536                 }
5537
5538                 # print only one empty line
5539                 # do not print empty line after signoff
5540                 if ($line eq "") {
5541                         next if ($skip_blank_line);
5542                         $skip_blank_line = 1;
5543                 } else {
5544                         $skip_blank_line = 0;
5545                 }
5546
5547                 print format_log_line_html($line) . "<br/>\n";
5548         }
5549
5550         if ($opts{'-final_empty_line'}) {
5551                 # end with single empty line
5552                 print "<br/>\n" unless $skip_blank_line;
5553         }
5554 }
5555
5556 # return link target (what link points to)
5557 sub git_get_link_target {
5558         my $hash = shift;
5559         my $link_target;
5560
5561         # read link
5562         defined(my $fd = git_cmd_pipe "cat-file", "blob", $hash)
5563                 or return;
5564         {
5565                 local $/ = undef;
5566                 $link_target = to_utf8(scalar <$fd>);
5567         }
5568         close $fd
5569                 or return;
5570
5571         return $link_target;
5572 }
5573
5574 # given link target, and the directory (basedir) the link is in,
5575 # return target of link relative to top directory (top tree);
5576 # return undef if it is not possible (including absolute links).
5577 sub normalize_link_target {
5578         my ($link_target, $basedir) = @_;
5579
5580         # absolute symlinks (beginning with '/') cannot be normalized
5581         return if (substr($link_target, 0, 1) eq '/');
5582
5583         # normalize link target to path from top (root) tree (dir)
5584         my $path;
5585         if ($basedir) {
5586                 $path = $basedir . '/' . $link_target;
5587         } else {
5588                 # we are in top (root) tree (dir)
5589                 $path = $link_target;
5590         }
5591
5592         # remove //, /./, and /../
5593         my @path_parts;
5594         foreach my $part (split('/', $path)) {
5595                 # discard '.' and ''
5596                 next if (!$part || $part eq '.');
5597                 # handle '..'
5598                 if ($part eq '..') {
5599                         if (@path_parts) {
5600                                 pop @path_parts;
5601                         } else {
5602                                 # link leads outside repository (outside top dir)
5603                                 return;
5604                         }
5605                 } else {
5606                         push @path_parts, $part;
5607                 }
5608         }
5609         $path = join('/', @path_parts);
5610
5611         return $path;
5612 }
5613
5614 # print tree entry (row of git_tree), but without encompassing <tr> element
5615 sub git_print_tree_entry {
5616         my ($t, $basedir, $hash_base, $have_blame) = @_;
5617
5618         my %base_key = ();
5619         $base_key{'hash_base'} = $hash_base if defined $hash_base;
5620
5621         # The format of a table row is: mode list link.  Where mode is
5622         # the mode of the entry, list is the name of the entry, an href,
5623         # and link is the action links of the entry.
5624
5625         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
5626         if (exists $t->{'size'}) {
5627                 print "<td class=\"size\">$t->{'size'}</td>\n";
5628         }
5629         if ($t->{'type'} eq "blob") {
5630                 print "<td class=\"list\">" .
5631                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
5632                                                file_name=>"$basedir$t->{'name'}", %base_key),
5633                                 -class => "list"}, esc_path($t->{'name'}));
5634                 if (S_ISLNK(oct $t->{'mode'})) {
5635                         my $link_target = git_get_link_target($t->{'hash'});
5636                         if ($link_target) {
5637                                 my $norm_target = normalize_link_target($link_target, $basedir);
5638                                 if (defined $norm_target) {
5639                                         print " -> " .
5640                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
5641                                                                      file_name=>$norm_target),
5642                                                        -title => $norm_target}, esc_path($link_target));
5643                                 } else {
5644                                         print " -> " . esc_path($link_target);
5645                                 }
5646                         }
5647                 }
5648                 print "</td>\n";
5649                 print "<td class=\"link\">";
5650                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
5651                                              file_name=>"$basedir$t->{'name'}", %base_key)},
5652                               "blob");
5653                 if ($have_blame) {
5654                         print " | " .
5655                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
5656                                                      file_name=>"$basedir$t->{'name'}", %base_key),
5657                                       -class => "blamelink"},
5658                                       "blame");
5659                 }
5660                 if (defined $hash_base) {
5661                         print " | " .
5662                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
5663                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
5664                                       "history");
5665                 }
5666                 print " | " .
5667                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
5668                                                file_name=>"$basedir$t->{'name'}")},
5669                                 "raw");
5670                 print "</td>\n";
5671
5672         } elsif ($t->{'type'} eq "tree") {
5673                 print "<td class=\"list\">";
5674                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
5675                                              file_name=>"$basedir$t->{'name'}",
5676                                              %base_key)},
5677                               esc_path($t->{'name'}));
5678                 print "</td>\n";
5679                 print "<td class=\"link\">";
5680                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
5681                                              file_name=>"$basedir$t->{'name'}",
5682                                              %base_key)},
5683                               "tree");
5684                 if (defined $hash_base) {
5685                         print " | " .
5686                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
5687                                                      file_name=>"$basedir$t->{'name'}")},
5688                                       "history");
5689                 }
5690                 print "</td>\n";
5691         } else {
5692                 # unknown object: we can only present history for it
5693                 # (this includes 'commit' object, i.e. submodule support)
5694                 print "<td class=\"list\">" .
5695                       esc_path($t->{'name'}) .
5696                       "</td>\n";
5697                 print "<td class=\"link\">";
5698                 if (defined $hash_base) {
5699                         print $cgi->a({-href => href(action=>"history",
5700                                                      hash_base=>$hash_base,
5701                                                      file_name=>"$basedir$t->{'name'}")},
5702                                       "history");
5703                 }
5704                 print "</td>\n";
5705         }
5706 }
5707
5708 ## ......................................................................
5709 ## functions printing large fragments of HTML
5710
5711 # get pre-image filenames for merge (combined) diff
5712 sub fill_from_file_info {
5713         my ($diff, @parents) = @_;
5714
5715         $diff->{'from_file'} = [ ];
5716         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
5717         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
5718                 if ($diff->{'status'}[$i] eq 'R' ||
5719                     $diff->{'status'}[$i] eq 'C') {
5720                         $diff->{'from_file'}[$i] =
5721                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
5722                 }
5723         }
5724
5725         return $diff;
5726 }
5727
5728 # is current raw difftree line of file deletion
5729 sub is_deleted {
5730         my $diffinfo = shift;
5731
5732         return $diffinfo->{'to_id'} eq ('0' x 40);
5733 }
5734
5735 # does patch correspond to [previous] difftree raw line
5736 # $diffinfo  - hashref of parsed raw diff format
5737 # $patchinfo - hashref of parsed patch diff format
5738 #              (the same keys as in $diffinfo)
5739 sub is_patch_split {
5740         my ($diffinfo, $patchinfo) = @_;
5741
5742         return defined $diffinfo && defined $patchinfo
5743                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
5744 }
5745
5746
5747 sub git_difftree_body {
5748         my ($difftree, $hash, @parents) = @_;
5749         my ($parent) = $parents[0];
5750         my $have_blame = gitweb_check_feature('blame');
5751         print "<div class=\"list_head\">\n";
5752         if ($#{$difftree} > 10) {
5753                 print(($#{$difftree} + 1) . " files changed:\n");
5754         }
5755         print "</div>\n";
5756
5757         print "<table class=\"" .
5758               (@parents > 1 ? "combined " : "") .
5759               "diff_tree\">\n";
5760
5761         # header only for combined diff in 'commitdiff' view
5762         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
5763         if ($has_header) {
5764                 # table header
5765                 print "<thead><tr>\n" .
5766                        "<th></th><th></th>\n"; # filename, patchN link
5767                 for (my $i = 0; $i < @parents; $i++) {
5768                         my $par = $parents[$i];
5769                         print "<th>" .
5770                               $cgi->a({-href => href(action=>"commitdiff",
5771                                                      hash=>$hash, hash_parent=>$par),
5772                                        -title => 'commitdiff to parent number ' .
5773                                                   ($i+1) . ': ' . substr($par,0,7)},
5774                                       $i+1) .
5775                               "&#160;</th>\n";
5776                 }
5777                 print "</tr></thead>\n<tbody>\n";
5778         }
5779
5780         my $alternate = 1;
5781         my $patchno = 0;
5782         foreach my $line (@{$difftree}) {
5783                 my $diff = parsed_difftree_line($line);
5784
5785                 if ($alternate) {
5786                         print "<tr class=\"dark\">\n";
5787                 } else {
5788                         print "<tr class=\"light\">\n";
5789                 }
5790                 $alternate ^= 1;
5791
5792                 if (exists $diff->{'nparents'}) { # combined diff
5793
5794                         fill_from_file_info($diff, @parents)
5795                                 unless exists $diff->{'from_file'};
5796
5797                         if (!is_deleted($diff)) {
5798                                 # file exists in the result (child) commit
5799                                 print "<td>" .
5800                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5801                                                              file_name=>$diff->{'to_file'},
5802                                                              hash_base=>$hash),
5803                                               -class => "list"}, esc_path($diff->{'to_file'})) .
5804                                       "</td>\n";
5805                         } else {
5806                                 print "<td>" .
5807                                       esc_path($diff->{'to_file'}) .
5808                                       "</td>\n";
5809                         }
5810
5811                         if ($action eq 'commitdiff') {
5812                                 # link to patch
5813                                 $patchno++;
5814                                 print "<td class=\"link\">" .
5815                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
5816                                               "patch") .
5817                                       " | " .
5818                                       "</td>\n";
5819                         }
5820
5821                         my $has_history = 0;
5822                         my $not_deleted = 0;
5823                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
5824                                 my $hash_parent = $parents[$i];
5825                                 my $from_hash = $diff->{'from_id'}[$i];
5826                                 my $from_path = $diff->{'from_file'}[$i];
5827                                 my $status = $diff->{'status'}[$i];
5828
5829                                 $has_history ||= ($status ne 'A');
5830                                 $not_deleted ||= ($status ne 'D');
5831
5832                                 if ($status eq 'A') {
5833                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
5834                                 } elsif ($status eq 'D') {
5835                                         print "<td class=\"link\">" .
5836                                               $cgi->a({-href => href(action=>"blob",
5837                                                                      hash_base=>$hash,
5838                                                                      hash=>$from_hash,
5839                                                                      file_name=>$from_path)},
5840                                                       "blob" . ($i+1)) .
5841                                               " | </td>\n";
5842                                 } else {
5843                                         if ($diff->{'to_id'} eq $from_hash) {
5844                                                 print "<td class=\"link nochange\">";
5845                                         } else {
5846                                                 print "<td class=\"link\">";
5847                                         }
5848                                         print $cgi->a({-href => href(action=>"blobdiff",
5849                                                                      hash=>$diff->{'to_id'},
5850                                                                      hash_parent=>$from_hash,
5851                                                                      hash_base=>$hash,
5852                                                                      hash_parent_base=>$hash_parent,
5853                                                                      file_name=>$diff->{'to_file'},
5854                                                                      file_parent=>$from_path)},
5855                                                       "diff" . ($i+1)) .
5856                                               " | </td>\n";
5857                                 }
5858                         }
5859
5860                         print "<td class=\"link\">";
5861                         if ($not_deleted) {
5862                                 print $cgi->a({-href => href(action=>"blob",
5863                                                              hash=>$diff->{'to_id'},
5864                                                              file_name=>$diff->{'to_file'},
5865                                                              hash_base=>$hash)},
5866                                               "blob");
5867                                 print " | " if ($has_history);
5868                         }
5869                         if ($has_history) {
5870                                 print $cgi->a({-href => href(action=>"history",
5871                                                              file_name=>$diff->{'to_file'},
5872                                                              hash_base=>$hash)},
5873                                               "history");
5874                         }
5875                         print "</td>\n";
5876
5877                         print "</tr>\n";
5878                         next; # instead of 'else' clause, to avoid extra indent
5879                 }
5880                 # else ordinary diff
5881
5882                 my ($to_mode_oct, $to_mode_str, $to_file_type);
5883                 my ($from_mode_oct, $from_mode_str, $from_file_type);
5884                 if ($diff->{'to_mode'} ne ('0' x 6)) {
5885                         $to_mode_oct = oct $diff->{'to_mode'};
5886                         if (S_ISREG($to_mode_oct)) { # only for regular file
5887                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
5888                         }
5889                         $to_file_type = file_type($diff->{'to_mode'});
5890                 }
5891                 if ($diff->{'from_mode'} ne ('0' x 6)) {
5892                         $from_mode_oct = oct $diff->{'from_mode'};
5893                         if (S_ISREG($from_mode_oct)) { # only for regular file
5894                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
5895                         }
5896                         $from_file_type = file_type($diff->{'from_mode'});
5897                 }
5898
5899                 if ($diff->{'status'} eq "A") { # created
5900                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
5901                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
5902                         $mode_chng   .= "]</span>";
5903                         print "<td>";
5904                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5905                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5906                                       -class => "list"}, esc_path($diff->{'file'}));
5907                         print "</td>\n";
5908                         print "<td>$mode_chng</td>\n";
5909                         print "<td class=\"link\">";
5910                         if ($action eq 'commitdiff') {
5911                                 # link to patch
5912                                 $patchno++;
5913                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5914                                               "patch") .
5915                                       " | ";
5916                         }
5917                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5918                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5919                                       "blob");
5920                         print "</td>\n";
5921
5922                 } elsif ($diff->{'status'} eq "D") { # deleted
5923                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5924                         print "<td>";
5925                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5926                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5927                                        -class => "list"}, esc_path($diff->{'file'}));
5928                         print "</td>\n";
5929                         print "<td>$mode_chng</td>\n";
5930                         print "<td class=\"link\">";
5931                         if ($action eq 'commitdiff') {
5932                                 # link to patch
5933                                 $patchno++;
5934                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5935                                               "patch") .
5936                                       " | ";
5937                         }
5938                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5939                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5940                                       "blob") . " | ";
5941                         if ($have_blame) {
5942                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5943                                                              file_name=>$diff->{'file'}),
5944                                               -class => "blamelink"},
5945                                               "blame") . " | ";
5946                         }
5947                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5948                                                      file_name=>$diff->{'file'})},
5949                                       "history");
5950                         print "</td>\n";
5951
5952                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5953                         my $mode_chnge = "";
5954                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5955                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5956                                 if ($from_file_type ne $to_file_type) {
5957                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5958                                 }
5959                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5960                                         if ($from_mode_str && $to_mode_str) {
5961                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5962                                         } elsif ($to_mode_str) {
5963                                                 $mode_chnge .= " mode: $to_mode_str";
5964                                         }
5965                                 }
5966                                 $mode_chnge .= "]</span>\n";
5967                         }
5968                         print "<td>";
5969                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5970                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5971                                       -class => "list"}, esc_path($diff->{'file'}));
5972                         print "</td>\n";
5973                         print "<td>$mode_chnge</td>\n";
5974                         print "<td class=\"link\">";
5975                         if ($action eq 'commitdiff') {
5976                                 # link to patch
5977                                 $patchno++;
5978                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5979                                               "patch") .
5980                                       " | ";
5981                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5982                                 # "commit" view and modified file (not onlu mode changed)
5983                                 print $cgi->a({-href => href(action=>"blobdiff",
5984                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5985                                                              hash_base=>$hash, hash_parent_base=>$parent,
5986                                                              file_name=>$diff->{'file'})},
5987                                               "diff") .
5988                                       " | ";
5989                         }
5990                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5991                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5992                                        "blob") . " | ";
5993                         if ($have_blame) {
5994                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5995                                                              file_name=>$diff->{'file'}),
5996                                               -class => "blamelink"},
5997                                               "blame") . " | ";
5998                         }
5999                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
6000                                                      file_name=>$diff->{'file'})},
6001                                       "history");
6002                         print "</td>\n";
6003
6004                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
6005                         my %status_name = ('R' => 'moved', 'C' => 'copied');
6006                         my $nstatus = $status_name{$diff->{'status'}};
6007                         my $mode_chng = "";
6008                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
6009                                 # mode also for directories, so we cannot use $to_mode_str
6010                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
6011                         }
6012                         print "<td>" .
6013                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
6014                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
6015                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
6016                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
6017                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
6018                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
6019                                       -class => "list"}, esc_path($diff->{'from_file'})) .
6020                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
6021                               "<td class=\"link\">";
6022                         if ($action eq 'commitdiff') {
6023                                 # link to patch
6024                                 $patchno++;
6025                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
6026                                               "patch") .
6027                                       " | ";
6028                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
6029                                 # "commit" view and modified file (not only pure rename or copy)
6030                                 print $cgi->a({-href => href(action=>"blobdiff",
6031                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
6032                                                              hash_base=>$hash, hash_parent_base=>$parent,
6033                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
6034                                               "diff") .
6035                                       " | ";
6036                         }
6037                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
6038                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
6039                                       "blob") . " | ";
6040                         if ($have_blame) {
6041                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
6042                                                              file_name=>$diff->{'to_file'}),
6043                                               -class => "blamelink"},
6044                                               "blame") . " | ";
6045                         }
6046                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
6047                                                     file_name=>$diff->{'to_file'})},
6048                                       "history");
6049                         print "</td>\n";
6050
6051                 } # we should not encounter Unmerged (U) or Unknown (X) status
6052                 print "</tr>\n";
6053         }
6054         print "</tbody>" if $has_header;
6055         print "</table>\n";
6056 }
6057
6058 # Print context lines and then rem/add lines in a side-by-side manner.
6059 sub print_sidebyside_diff_lines {
6060         my ($ctx, $rem, $add) = @_;
6061
6062         # print context block before add/rem block
6063         if (@$ctx) {
6064                 print join '',
6065                         '<div class="chunk_block ctx">',
6066                                 '<div class="old">',
6067                                 @$ctx,
6068                                 '</div>',
6069                                 '<div class="new">',
6070                                 @$ctx,
6071                                 '</div>',
6072                         '</div>';
6073         }
6074
6075         if (!@$add) {
6076                 # pure removal
6077                 print join '',
6078                         '<div class="chunk_block rem">',
6079                                 '<div class="old">',
6080                                 @$rem,
6081                                 '</div>',
6082                         '</div>';
6083         } elsif (!@$rem) {
6084                 # pure addition
6085                 print join '',
6086                         '<div class="chunk_block add">',
6087                                 '<div class="new">',
6088                                 @$add,
6089                                 '</div>',
6090                         '</div>';
6091         } else {
6092                 print join '',
6093                         '<div class="chunk_block chg">',
6094                                 '<div class="old">',
6095                                 @$rem,
6096                                 '</div>',
6097                                 '<div class="new">',
6098                                 @$add,
6099                                 '</div>',
6100                         '</div>';
6101         }
6102 }
6103
6104 # Print context lines and then rem/add lines in inline manner.
6105 sub print_inline_diff_lines {
6106         my ($ctx, $rem, $add) = @_;
6107
6108         print @$ctx, @$rem, @$add;
6109 }
6110
6111 # Format removed and added line, mark changed part and HTML-format them.
6112 # Implementation is based on contrib/diff-highlight
6113 sub format_rem_add_lines_pair {
6114         my ($rem, $add, $num_parents) = @_;
6115
6116         # We need to untabify lines before split()'ing them;
6117         # otherwise offsets would be invalid.
6118         chomp $rem;
6119         chomp $add;
6120         $rem = untabify($rem);
6121         $add = untabify($add);
6122
6123         my @rem = split(//, $rem);
6124         my @add = split(//, $add);
6125         my ($esc_rem, $esc_add);
6126         # Ignore leading +/- characters for each parent.
6127         my ($prefix_len, $suffix_len) = ($num_parents, 0);
6128         my ($prefix_has_nonspace, $suffix_has_nonspace);
6129
6130         my $shorter = (@rem < @add) ? @rem : @add;
6131         while ($prefix_len < $shorter) {
6132                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
6133
6134                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
6135                 $prefix_len++;
6136         }
6137
6138         while ($prefix_len + $suffix_len < $shorter) {
6139                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
6140
6141                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
6142                 $suffix_len++;
6143         }
6144
6145         # Mark lines that are different from each other, but have some common
6146         # part that isn't whitespace.  If lines are completely different, don't
6147         # mark them because that would make output unreadable, especially if
6148         # diff consists of multiple lines.
6149         if ($prefix_has_nonspace || $suffix_has_nonspace) {
6150                 $esc_rem = esc_html_hl_regions($rem, 'marked',
6151                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
6152                 $esc_add = esc_html_hl_regions($add, 'marked',
6153                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
6154         } else {
6155                 $esc_rem = esc_html($rem, -nbsp=>1);
6156                 $esc_add = esc_html($add, -nbsp=>1);
6157         }
6158
6159         return format_diff_line(\$esc_rem, 'rem'),
6160                format_diff_line(\$esc_add, 'add');
6161 }
6162
6163 # HTML-format diff context, removed and added lines.
6164 sub format_ctx_rem_add_lines {
6165         my ($ctx, $rem, $add, $num_parents) = @_;
6166         my (@new_ctx, @new_rem, @new_add);
6167         my $can_highlight = 0;
6168         my $is_combined = ($num_parents > 1);
6169
6170         # Highlight if every removed line has a corresponding added line.
6171         if (@$add > 0 && @$add == @$rem) {
6172                 $can_highlight = 1;
6173
6174                 # Highlight lines in combined diff only if the chunk contains
6175                 # diff between the same version, e.g.
6176                 #
6177                 #    - a
6178                 #   -  b
6179                 #    + c
6180                 #   +  d
6181                 #
6182                 # Otherwise the highlightling would be confusing.
6183                 if ($is_combined) {
6184                         for (my $i = 0; $i < @$add; $i++) {
6185                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
6186                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
6187
6188                                 $prefix_rem =~ s/-/+/g;
6189
6190                                 if ($prefix_rem ne $prefix_add) {
6191                                         $can_highlight = 0;
6192                                         last;
6193                                 }
6194                         }
6195                 }
6196         }
6197
6198         if ($can_highlight) {
6199                 for (my $i = 0; $i < @$add; $i++) {
6200                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
6201                                 $rem->[$i], $add->[$i], $num_parents);
6202                         push @new_rem, $line_rem;
6203                         push @new_add, $line_add;
6204                 }
6205         } else {
6206                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
6207                 @new_add = map { format_diff_line($_, 'add') } @$add;
6208         }
6209
6210         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
6211
6212         return (\@new_ctx, \@new_rem, \@new_add);
6213 }
6214
6215 # Print context lines and then rem/add lines.
6216 sub print_diff_lines {
6217         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
6218         my $is_combined = $num_parents > 1;
6219
6220         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
6221                 $num_parents);
6222
6223         if ($diff_style eq 'sidebyside' && !$is_combined) {
6224                 print_sidebyside_diff_lines($ctx, $rem, $add);
6225         } else {
6226                 # default 'inline' style and unknown styles
6227                 print_inline_diff_lines($ctx, $rem, $add);
6228         }
6229 }
6230
6231 sub print_diff_chunk {
6232         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
6233         my (@ctx, @rem, @add);
6234
6235         # The class of the previous line.
6236         my $prev_class = '';
6237
6238         return unless @chunk;
6239
6240         # incomplete last line might be among removed or added lines,
6241         # or both, or among context lines: find which
6242         for (my $i = 1; $i < @chunk; $i++) {
6243                 if ($chunk[$i][0] eq 'incomplete') {
6244                         $chunk[$i][0] = $chunk[$i-1][0];
6245                 }
6246         }
6247
6248         # guardian
6249         push @chunk, ["", ""];
6250
6251         foreach my $line_info (@chunk) {
6252                 my ($class, $line) = @$line_info;
6253
6254                 # print chunk headers
6255                 if ($class && $class eq 'chunk_header') {
6256                         print format_diff_line($line, $class, $from, $to);
6257                         next;
6258                 }
6259
6260                 ## print from accumulator when have some add/rem lines or end
6261                 # of chunk (flush context lines), or when have add and rem
6262                 # lines and new block is reached (otherwise add/rem lines could
6263                 # be reordered)
6264                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
6265                     (@rem && @add && $class ne $prev_class)) {
6266                         print_diff_lines(\@ctx, \@rem, \@add,
6267                                          $diff_style, $num_parents);
6268                         @ctx = @rem = @add = ();
6269                 }
6270
6271                 ## adding lines to accumulator
6272                 # guardian value
6273                 last unless $line;
6274                 # rem, add or change
6275                 if ($class eq 'rem') {
6276                         push @rem, $line;
6277                 } elsif ($class eq 'add') {
6278                         push @add, $line;
6279                 }
6280                 # context line
6281                 if ($class eq 'ctx') {
6282                         push @ctx, $line;
6283                 }
6284
6285                 $prev_class = $class;
6286         }
6287 }
6288
6289 sub git_patchset_body {
6290         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
6291         my ($hash_parent) = $hash_parents[0];
6292
6293         my $is_combined = (@hash_parents > 1);
6294         my $patch_idx = 0;
6295         my $patch_number = 0;
6296         my $patch_line;
6297         my $diffinfo;
6298         my $to_name;
6299         my (%from, %to);
6300         my @chunk; # for side-by-side diff
6301
6302         print "<div class=\"patchset\">\n";
6303
6304         # skip to first patch
6305         while ($patch_line = to_utf8(scalar <$fd>)) {
6306                 chomp $patch_line;
6307
6308                 last if ($patch_line =~ m/^diff /);
6309         }
6310
6311  PATCH:
6312         while ($patch_line) {
6313
6314                 # parse "git diff" header line
6315                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
6316                         # $1 is from_name, which we do not use
6317                         $to_name = unquote($2);
6318                         $to_name =~ s!^b/!!;
6319                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
6320                         # $1 is 'cc' or 'combined', which we do not use
6321                         $to_name = unquote($2);
6322                 } else {
6323                         $to_name = undef;
6324                 }
6325
6326                 # check if current patch belong to current raw line
6327                 # and parse raw git-diff line if needed
6328                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
6329                         # this is continuation of a split patch
6330                         print "<div class=\"patch cont\">\n";
6331                 } else {
6332                         # advance raw git-diff output if needed
6333                         $patch_idx++ if defined $diffinfo;
6334
6335                         # read and prepare patch information
6336                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
6337
6338                         # compact combined diff output can have some patches skipped
6339                         # find which patch (using pathname of result) we are at now;
6340                         if ($is_combined) {
6341                                 while ($to_name ne $diffinfo->{'to_file'}) {
6342                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
6343                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
6344                                               "</div>\n";  # class="patch"
6345
6346                                         $patch_idx++;
6347                                         $patch_number++;
6348
6349                                         last if $patch_idx > $#$difftree;
6350                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
6351                                 }
6352                         }
6353
6354                         # modifies %from, %to hashes
6355                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
6356
6357                         # this is first patch for raw difftree line with $patch_idx index
6358                         # we index @$difftree array from 0, but number patches from 1
6359                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
6360                 }
6361
6362                 # git diff header
6363                 #assert($patch_line =~ m/^diff /) if DEBUG;
6364                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
6365                 $patch_number++;
6366                 # print "git diff" header
6367                 print format_git_diff_header_line($patch_line, $diffinfo,
6368                                                   \%from, \%to);
6369
6370                 # print extended diff header
6371                 print "<div class=\"diff extended_header\">\n";
6372         EXTENDED_HEADER:
6373                 while ($patch_line = to_utf8(scalar<$fd>)) {
6374                         chomp $patch_line;
6375
6376                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
6377
6378                         print format_extended_diff_header_line($patch_line, $diffinfo,
6379                                                                \%from, \%to);
6380                 }
6381                 print "</div>\n"; # class="diff extended_header"
6382
6383                 # from-file/to-file diff header
6384                 if (! $patch_line) {
6385                         print "</div>\n"; # class="patch"
6386                         last PATCH;
6387                 }
6388                 next PATCH if ($patch_line =~ m/^diff /);
6389                 #assert($patch_line =~ m/^---/) if DEBUG;
6390
6391                 my $last_patch_line = $patch_line;
6392                 $patch_line = to_utf8(scalar <$fd>);
6393                 chomp $patch_line;
6394                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
6395
6396                 print format_diff_from_to_header($last_patch_line, $patch_line,
6397                                                  $diffinfo, \%from, \%to,
6398                                                  @hash_parents);
6399
6400                 # the patch itself
6401         LINE:
6402                 while ($patch_line = to_utf8(scalar <$fd>)) {
6403                         chomp $patch_line;
6404
6405                         next PATCH if ($patch_line =~ m/^diff /);
6406
6407                         my $class = diff_line_class($patch_line, \%from, \%to);
6408
6409                         if ($class eq 'chunk_header') {
6410                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
6411                                 @chunk = ();
6412                         }
6413
6414                         push @chunk, [ $class, $patch_line ];
6415                 }
6416
6417         } continue {
6418                 if (@chunk) {
6419                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
6420                         @chunk = ();
6421                 }
6422                 print "</div>\n"; # class="patch"
6423         }
6424
6425         # for compact combined (--cc) format, with chunk and patch simplification
6426         # the patchset might be empty, but there might be unprocessed raw lines
6427         for (++$patch_idx if $patch_number > 0;
6428              $patch_idx < @$difftree;
6429              ++$patch_idx) {
6430                 # read and prepare patch information
6431                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
6432
6433                 # generate anchor for "patch" links in difftree / whatchanged part
6434                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
6435                       format_diff_cc_simplified($diffinfo, @hash_parents) .
6436                       "</div>\n";  # class="patch"
6437
6438                 $patch_number++;
6439         }
6440
6441         if ($patch_number == 0) {
6442                 if (@hash_parents > 1) {
6443                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
6444                 } else {
6445                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
6446                 }
6447         }
6448
6449         print "</div>\n"; # class="patchset"
6450 }
6451
6452 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6453
6454 sub git_project_search_form {
6455         my ($searchtext, $search_use_regexp) = @_;
6456
6457         my $limit = '';
6458         if ($project_filter) {
6459                 $limit = " in '$project_filter'";
6460         }
6461
6462         print "<div class=\"projsearch\">\n";
6463         print $cgi->start_form(-method => 'get', -action => $my_uri) .
6464               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
6465         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
6466                 if (defined $project_filter);
6467         print $cgi->textfield(-name => 's', -value => $searchtext,
6468                               -title => "Search project by name and description$limit",
6469                               -size => 60) . "\n" .
6470               "<span title=\"Extended regular expression\">" .
6471               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
6472                              -checked => $search_use_regexp) .
6473               "</span>\n" .
6474               $cgi->submit(-name => 'btnS', -value => 'Search') .
6475               $cgi->end_form() . "\n" .
6476               "<span class=\"projectlist_link\">" .
6477               $cgi->a({-href => href(project => undef, searchtext => undef,
6478                                      action => 'project_list',
6479                                      project_filter => $project_filter)},
6480                       esc_html("List all projects$limit")) . "</span><br />\n";
6481         print "<span class=\"projectlist_link\">" .
6482               $cgi->a({-href => href(project => undef, searchtext => undef,
6483                                      action => 'project_list',
6484                                      project_filter => undef)},
6485                       esc_html("List all projects")) . "</span>\n" if $project_filter;
6486         print "</div>\n";
6487 }
6488
6489 # entry for given @keys needs filling if at least one of keys in list
6490 # is not present in %$project_info
6491 sub project_info_needs_filling {
6492         my ($project_info, @keys) = @_;
6493
6494         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
6495         foreach my $key (@keys) {
6496                 if (!exists $project_info->{$key}) {
6497                         return 1;
6498                 }
6499         }
6500         return;
6501 }
6502
6503 sub git_cache_file_format {
6504         return GITWEB_CACHE_FORMAT .
6505                 (gitweb_check_feature('forks') ? " (forks)" : "");
6506 }
6507
6508 sub git_retrieve_cache_file {
6509         my $cache_file = shift;
6510
6511         use Storable qw(retrieve);
6512
6513         if ((my $dump = eval { retrieve($cache_file) })) {
6514                 return $$dump[1] if
6515                         ref($dump) eq 'ARRAY' &&
6516                         @$dump == 2 &&
6517                         ref($$dump[1]) eq 'ARRAY' &&
6518                         @{$$dump[1]} == 2 &&
6519                         ref(${$$dump[1]}[0]) eq 'ARRAY' &&
6520                         ref(${$$dump[1]}[1]) eq 'HASH' &&
6521                         $$dump[0] eq git_cache_file_format();
6522         }
6523
6524         return undef;
6525 }
6526
6527 sub git_store_cache_file {
6528         my ($cache_file, $cachedata) = @_;
6529
6530         use File::Basename qw(dirname);
6531         use File::stat;
6532         use POSIX qw(:fcntl_h);
6533         use Storable qw(store_fd);
6534
6535         my $result = undef;
6536         my $cache_d = dirname($cache_file);
6537         my $mask = umask();
6538         umask($mask & ~0070) if $cache_grpshared;
6539         if ((-d $cache_d || mkdir($cache_d, $cache_grpshared ? 0770 : 0700)) &&
6540             sysopen(my $fd, "$cache_file.lock", O_WRONLY|O_CREAT|O_EXCL, $cache_grpshared ? 0660 : 0600)) {
6541                 store_fd([git_cache_file_format(), $cachedata], $fd);
6542                 close $fd;
6543                 rename "$cache_file.lock", $cache_file;
6544                 $result = stat($cache_file)->mtime;
6545         }
6546         umask($mask) if $cache_grpshared;
6547         return $result;
6548 }
6549
6550 sub verify_cached_project {
6551         my ($hashref, $path) = @_;
6552         return undef unless $path;
6553         delete $$hashref{$path}, return undef unless is_valid_project($path);
6554         return $$hashref{$path} if exists $$hashref{$path};
6555
6556         # A valid project was requested but it's not yet in the cache
6557         # Manufacture a minimal project entry (path, name, description)
6558         # Also provide age, but only if it's available via $lastactivity_file
6559
6560         my %proj = ('path' => $path);
6561         my $val = git_get_project_description($path);
6562         defined $val or $val = '';
6563         $proj{'descr_long'} = $val;
6564         $proj{'descr'} = chop_str($val, $projects_list_description_width, 5);
6565         unless ($omit_owner) {
6566                 $val = git_get_project_owner($path);
6567                 defined $val or $val = '';
6568                 $proj{'owner'} = $val;
6569         }
6570         unless ($omit_age_column) {
6571                 ($val) = git_get_last_activity($path, 1);
6572                 $proj{'age_epoch'} = $val if defined $val;
6573         }
6574         $$hashref{$path} = \%proj;
6575         return \%proj;
6576 }
6577
6578 sub git_filter_cached_projects {
6579         my ($cache, $projlist, $verify) = @_;
6580         my $hashref = $$cache[1];
6581         my $sub = $verify ?
6582                 sub {verify_cached_project($hashref, $_[0])} :
6583                 sub {$$hashref{$_[0]}};
6584         return map {
6585                 my $c = &$sub($_->{'path'});
6586                 defined $c ? ($_ = $c) : ()
6587         } @$projlist;
6588 }
6589
6590 # fills project list info (age, description, owner, category, forks, etc.)
6591 # for each project in the list, removing invalid projects from
6592 # returned list, or fill only specified info.
6593 #
6594 # Invalid projects are removed from the returned list if and only if you
6595 # ask 'age_epoch' to be filled, because they are the only fields
6596 # that run unconditionally git command that requires repository, and
6597 # therefore do always check if project repository is invalid.
6598 #
6599 # USAGE:
6600 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
6601 #   ensures that 'descr_long' and 'ctags' fields are filled
6602 # * @project_list = fill_project_list_info(\@project_list)
6603 #   ensures that all fields are filled (and invalid projects removed)
6604 #
6605 # NOTE: modifies $projlist, but does not remove entries from it
6606 sub fill_project_list_info {
6607         my ($projlist, @wanted_keys) = @_;
6608
6609         my $rebuild = @wanted_keys && $wanted_keys[0] eq 'rebuild-cache' && shift @wanted_keys;
6610         return fill_project_list_info_uncached($projlist, @wanted_keys)
6611                 unless $projlist_cache_lifetime && $projlist_cache_lifetime > 0;
6612
6613         use File::stat;
6614
6615         my $cache_lifetime = $rebuild ? 0 : $projlist_cache_lifetime;
6616         my $cache_file = "$cache_dir/$projlist_cache_name";
6617
6618         my @projects;
6619         my $stale = 0;
6620         my $now = time();
6621         my $cache_mtime;
6622         if ($cache_lifetime && -f $cache_file) {
6623                 $cache_mtime = stat($cache_file)->mtime;
6624                 $cache_dump = undef if $cache_mtime &&
6625                         (!$cache_dump_mtime || $cache_dump_mtime != $cache_mtime);
6626         }
6627         if (defined $cache_mtime && # caching is on and $cache_file exists
6628             $cache_mtime + $cache_lifetime*60 > $now &&
6629             ($cache_dump || ($cache_dump = git_retrieve_cache_file($cache_file)))) {
6630                 # Cache hit.
6631                 $cache_dump_mtime = $cache_mtime;
6632                 $stale = $now - $cache_mtime;
6633                 my $verify = ($action eq 'summary' || $action eq 'forks') &&
6634                         gitweb_check_feature('forks');
6635                 @projects = git_filter_cached_projects($cache_dump, $projlist, $verify);
6636
6637         } else { # Cache miss.
6638                 if (defined $cache_mtime) {
6639                         # Postpone timeout by two minutes so that we get
6640                         # enough time to do our job, or to be more exact
6641                         # make cache expire after two minutes from now.
6642                         my $time = $now - $cache_lifetime*60 + 120;
6643                         utime $time, $time, $cache_file;
6644                 }
6645                 my @all_projects = git_get_projects_list();
6646                 my %all_projects_filled = map { ( $_->{'path'} => $_ ) }
6647                         fill_project_list_info_uncached(\@all_projects);
6648                 map { $all_projects_filled{$_->{'path'}} = $_ }
6649                         filter_forks_from_projects_list([values(%all_projects_filled)])
6650                         if gitweb_check_feature('forks');
6651                 $cache_dump = [[sort {$a->{'path'} cmp $b->{'path'}} values(%all_projects_filled)],
6652                                \%all_projects_filled];
6653                 $cache_dump_mtime = git_store_cache_file($cache_file, $cache_dump);
6654                 @projects = git_filter_cached_projects($cache_dump, $projlist);
6655         }
6656
6657         if ($cache_lifetime && $stale > 0) {
6658                 print "<div class=\"stale_info\">Cached version (${stale}s old)</div>\n"
6659                         unless $shown_stale_message;
6660                 $shown_stale_message = 1;
6661         }
6662
6663         return @projects;
6664 }
6665
6666 sub fill_project_list_info_uncached {
6667         my ($projlist, @wanted_keys) = @_;
6668         my @projects;
6669         my $filter_set = sub { return @_; };
6670         if (@wanted_keys) {
6671                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
6672                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
6673         }
6674
6675         my $show_ctags = gitweb_check_feature('ctags');
6676  PROJECT:
6677         foreach my $pr (@$projlist) {
6678                 if (project_info_needs_filling($pr, $filter_set->('age_epoch'))) {
6679                         my (@activity) = git_get_last_activity($pr->{'path'});
6680                         unless (@activity) {
6681                                 next PROJECT;
6682                         }
6683                         ($pr->{'age_epoch'}) = @activity;
6684                 }
6685                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
6686                         my $descr = git_get_project_description($pr->{'path'}) || "";
6687                         $descr = to_utf8($descr);
6688                         $pr->{'descr_long'} = $descr;
6689                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
6690                 }
6691                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
6692                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
6693                 }
6694                 if ($show_ctags &&
6695                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
6696                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
6697                 }
6698                 if ($projects_list_group_categories &&
6699                     project_info_needs_filling($pr, $filter_set->('category'))) {
6700                         my $cat = git_get_project_category($pr->{'path'}) ||
6701                                                            $project_list_default_category;
6702                         $pr->{'category'} = to_utf8($cat);
6703                 }
6704
6705                 push @projects, $pr;
6706         }
6707
6708         return @projects;
6709 }
6710
6711 sub sort_projects_list {
6712         my ($projlist, $order) = @_;
6713
6714         sub order_str {
6715                 my $key = shift;
6716                 return sub { lc($a->{$key}) cmp lc($b->{$key}) };
6717         }
6718
6719         sub order_reverse_num_then_undef {
6720                 my $key = shift;
6721                 return sub {
6722                         defined $a->{$key} ?
6723                                 (defined $b->{$key} ? $b->{$key} <=> $a->{$key} : -1) :
6724                                 (defined $b->{$key} ? 1 : 0)
6725                 };
6726         }
6727
6728         my %orderings = (
6729                 project => order_str('path'),
6730                 descr => order_str('descr_long'),
6731                 owner => order_str('owner'),
6732                 age => order_reverse_num_then_undef('age_epoch'),
6733         );
6734
6735         my $ordering = $orderings{$order};
6736         return defined $ordering ? sort $ordering @$projlist : @$projlist;
6737 }
6738
6739 # returns a hash of categories, containing the list of project
6740 # belonging to each category
6741 sub build_projlist_by_category {
6742         my ($projlist, $from, $to) = @_;
6743         my %categories;
6744
6745         $from = 0 unless defined $from;
6746         $to = $#$projlist if (!defined $to || $#$projlist < $to);
6747
6748         for (my $i = $from; $i <= $to; $i++) {
6749                 my $pr = $projlist->[$i];
6750                 push @{$categories{ $pr->{'category'} }}, $pr;
6751         }
6752
6753         return wantarray ? %categories : \%categories;
6754 }
6755
6756 # print 'sort by' <th> element, generating 'sort by $name' replay link
6757 # if that order is not selected
6758 sub print_sort_th {
6759         print format_sort_th(@_);
6760 }
6761
6762 sub format_sort_th {
6763         my ($name, $order, $header) = @_;
6764         my $sort_th = "";
6765         $header ||= ucfirst($name);
6766
6767         if ($order eq $name) {
6768                 $sort_th .= "<th>$header</th>\n";
6769         } else {
6770                 $sort_th .= "<th>" .
6771                             $cgi->a({-href => href(-replay=>1, order=>$name),
6772                                      -class => "header"}, $header) .
6773                             "</th>\n";
6774         }
6775
6776         return $sort_th;
6777 }
6778
6779 sub git_project_list_rows {
6780         my ($projlist, $from, $to, $check_forks) = @_;
6781
6782         $from = 0 unless defined $from;
6783         $to = $#$projlist if (!defined $to || $#$projlist < $to);
6784
6785         my $now = time;
6786         my $alternate = 1;
6787         for (my $i = $from; $i <= $to; $i++) {
6788                 my $pr = $projlist->[$i];
6789
6790                 if ($alternate) {
6791                         print "<tr class=\"dark\">\n";
6792                 } else {
6793                         print "<tr class=\"light\">\n";
6794                 }
6795                 $alternate ^= 1;
6796
6797                 if ($check_forks) {
6798                         print "<td>";
6799                         if ($pr->{'forks'}) {
6800                                 my $nforks = scalar @{$pr->{'forks'}};
6801                                 my $s = $nforks == 1 ? '' : 's';
6802                                 if ($nforks > 0) {
6803                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
6804                                                        -title => "$nforks fork$s"}, "+");
6805                                 } else {
6806                                         print $cgi->span({-title => "$nforks fork$s"}, "+");
6807                                 }
6808                         }
6809                         print "</td>\n";
6810                 }
6811                 my $path = $pr->{'path'};
6812                 my $dotgit = $path =~ s/\.git$// ? '.git' : '';
6813                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
6814                                         -class => "list"},
6815                                        esc_html_match_hl($path, $search_regexp).$dotgit) .
6816                       "</td>\n" .
6817                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
6818                                         -class => "list",
6819                                         -title => $pr->{'descr_long'}},
6820                                         $search_regexp
6821                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
6822                                                                     $pr->{'descr'}, $search_regexp)
6823                                         : esc_html($pr->{'descr'})) .
6824                       "</td>\n";
6825                 unless ($omit_owner) {
6826                         print "<td><i>" . ($owner_link_hook
6827                                           ? $cgi->a({-href => $owner_link_hook->($pr->{'owner'}), -class => "list"},
6828                                                     chop_and_escape_str($pr->{'owner'}, 15))
6829                                           : chop_and_escape_str($pr->{'owner'}, 15)) . "</i></td>\n";
6830                 }
6831                 unless ($omit_age_column) {
6832                         my ($age_epoch, $age_string) = ($pr->{'age_epoch'});
6833                         $age_string = defined $age_epoch ? age_string($age_epoch, $now) : "No commits";
6834                         print "<td class=\"". age_class($age_epoch, $now) . "\">" . $age_string . "</td>\n";
6835                 }
6836                 print"<td class=\"link\">" .
6837                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
6838                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "log") . " | " .
6839                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
6840                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
6841                       "</td>\n" .
6842                       "</tr>\n";
6843         }
6844 }
6845
6846 sub git_project_list_body {
6847         # actually uses global variable $project
6848         my ($projlist, $order, $from, $to, $extra, $no_header, $ctags_action, $keep_top) = @_;
6849         my @projects = @$projlist;
6850
6851         my $check_forks = gitweb_check_feature('forks');
6852         my $show_ctags  = gitweb_check_feature('ctags');
6853         my $tagfilter = $show_ctags ? $input_params{'ctag_filter'} : undef;
6854         $check_forks = undef
6855                 if ($tagfilter || $search_regexp);
6856
6857         # filtering out forks before filling info allows us to do less work
6858         if ($check_forks) {
6859                 @projects = filter_forks_from_projects_list(\@projects);
6860                 push @projects, { 'path' => "$project_filter.git" }
6861                         if $project_filter && $keep_top && is_valid_project("$project_filter.git");
6862         }
6863         # search_projects_list pre-fills required info
6864         @projects = search_projects_list(\@projects,
6865                                          'search_regexp' => $search_regexp,
6866                                          'tagfilter'  => $tagfilter)
6867                 if ($tagfilter || $search_regexp);
6868         # fill the rest
6869         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
6870         push @all_fields, 'age_epoch' unless($omit_age_column);
6871         push @all_fields, 'owner' unless($omit_owner);
6872         @projects = fill_project_list_info(\@projects, @all_fields);
6873
6874         $order ||= $default_projects_order;
6875         $from = 0 unless defined $from;
6876         $to = $#projects if (!defined $to || $#projects < $to);
6877
6878         # short circuit
6879         if ($from > $to) {
6880                 print "<center>\n".
6881                       "<b>No such projects found</b><br />\n".
6882                       "Click ".$cgi->a({-href=>href(project=>undef,action=>'project_list')},"here")." to view all projects<br />\n".
6883                       "</center>\n<br />\n";
6884                 return;
6885         }
6886
6887         @projects = sort_projects_list(\@projects, $order);
6888
6889         if ($show_ctags) {
6890                 my $ctags = git_gather_all_ctags(\@projects);
6891                 my $cloud = git_populate_project_tagcloud($ctags, $ctags_action||'project_list');
6892                 print git_show_project_tagcloud($cloud, 64);
6893         }
6894
6895         print "<table class=\"project_list\">\n";
6896         unless ($no_header) {
6897                 print "<tr>\n";
6898                 if ($check_forks) {
6899                         print "<th></th>\n";
6900                 }
6901                 print_sort_th('project', $order, 'Project');
6902                 print_sort_th('descr', $order, 'Description');
6903                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
6904                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
6905                 print "<th></th>\n" . # for links
6906                       "</tr>\n";
6907         }
6908
6909         if ($projects_list_group_categories) {
6910                 # only display categories with projects in the $from-$to window
6911                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
6912                 my %categories = build_projlist_by_category(\@projects, $from, $to);
6913                 foreach my $cat (sort keys %categories) {
6914                         unless ($cat eq "") {
6915                                 print "<tr>\n";
6916                                 if ($check_forks) {
6917                                         print "<td></td>\n";
6918                                 }
6919                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
6920                                 print "</tr>\n";
6921                         }
6922
6923                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
6924                 }
6925         } else {
6926                 git_project_list_rows(\@projects, $from, $to, $check_forks);
6927         }
6928
6929         if (defined $extra) {
6930                 print "<tr>\n";
6931                 if ($check_forks) {
6932                         print "<td></td>\n";
6933                 }
6934                 print "<td colspan=\"5\">$extra</td>\n" .
6935                       "</tr>\n";
6936         }
6937         print "</table>\n";
6938 }
6939
6940 sub git_log_body {
6941         # uses global variable $project
6942         my ($commitlist, $from, $to, $refs, $extra) = @_;
6943
6944         $from = 0 unless defined $from;
6945         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6946
6947         for (my $i = 0; $i <= $to; $i++) {
6948                 my %co = %{$commitlist->[$i]};
6949                 next if !%co;
6950                 my $commit = $co{'id'};
6951                 my $ref = format_ref_marker($refs, $commit);
6952                 git_print_header_div('commit',
6953                                "<span class=\"age\">$co{'age_string'}</span>" .
6954                                esc_html($co{'title'}),
6955                                $commit, undef, $ref);
6956                 print "<div class=\"title_text\">\n" .
6957                       "<div class=\"log_link\">\n" .
6958                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
6959                       " | " .
6960                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
6961                       " | " .
6962                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
6963                       "<br/>\n" .
6964                       "</div>\n";
6965                       git_print_authorship(\%co, -tag => 'span');
6966                       print "<br/>\n</div>\n";
6967
6968                 print "<div class=\"log_body\">\n";
6969                 git_print_log($co{'comment'}, -final_empty_line=> 1);
6970                 print "</div>\n";
6971         }
6972         if ($extra) {
6973                 print "<div class=\"page_nav\">\n";
6974                 print "$extra\n";
6975                 print "</div>\n";
6976         }
6977 }
6978
6979 sub git_shortlog_body {
6980         # uses global variable $project
6981         my ($commitlist, $from, $to, $refs, $extra) = @_;
6982
6983         $from = 0 unless defined $from;
6984         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6985
6986         print "<table class=\"shortlog\">\n";
6987         my $alternate = 1;
6988         for (my $i = $from; $i <= $to; $i++) {
6989                 my %co = %{$commitlist->[$i]};
6990                 my $commit = $co{'id'};
6991                 my $ref = format_ref_marker($refs, $commit);
6992                 if ($alternate) {
6993                         print "<tr class=\"dark\">\n";
6994                 } else {
6995                         print "<tr class=\"light\">\n";
6996                 }
6997                 $alternate ^= 1;
6998                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
6999                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7000                       format_author_html('td', \%co, 10) . "<td>";
7001                 print format_subject_html($co{'title'}, $co{'title_short'},
7002                                           href(action=>"commit", hash=>$commit), $ref);
7003                 print "</td>\n" .
7004                       "<td class=\"link\">" .
7005                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
7006                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
7007                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
7008                 my $snapshot_links = format_snapshot_links($commit);
7009                 if (defined $snapshot_links) {
7010                         print " | " . $snapshot_links;
7011                 }
7012                 print "</td>\n" .
7013                       "</tr>\n";
7014         }
7015         if (defined $extra) {
7016                 print "<tr>\n" .
7017                       "<td colspan=\"4\">$extra</td>\n" .
7018                       "</tr>\n";
7019         }
7020         print "</table>\n";
7021 }
7022
7023 sub git_history_body {
7024         # Warning: assumes constant type (blob or tree) during history
7025         my ($commitlist, $from, $to, $refs, $extra,
7026             $file_name, $file_hash, $ftype) = @_;
7027
7028         $from = 0 unless defined $from;
7029         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
7030
7031         print "<table class=\"history\">\n";
7032         my $alternate = 1;
7033         for (my $i = $from; $i <= $to; $i++) {
7034                 my %co = %{$commitlist->[$i]};
7035                 if (!%co) {
7036                         next;
7037                 }
7038                 my $commit = $co{'id'};
7039
7040                 my $ref = format_ref_marker($refs, $commit);
7041
7042                 if ($alternate) {
7043                         print "<tr class=\"dark\">\n";
7044                 } else {
7045                         print "<tr class=\"light\">\n";
7046                 }
7047                 $alternate ^= 1;
7048                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7049         # shortlog:   format_author_html('td', \%co, 10)
7050                       format_author_html('td', \%co, 15, 3) . "<td>";
7051                 # originally git_history used chop_str($co{'title'}, 50)
7052                 print format_subject_html($co{'title'}, $co{'title_short'},
7053                                           href(action=>"commit", hash=>$commit), $ref);
7054                 print "</td>\n" .
7055                       "<td class=\"link\">" .
7056                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
7057                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
7058
7059                 if ($ftype eq 'blob') {
7060                         my $blob_current = $file_hash;
7061                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
7062                         if (defined $blob_current && defined $blob_parent &&
7063                                         $blob_current ne $blob_parent) {
7064                                 print " | " .
7065                                         $cgi->a({-href => href(action=>"blobdiff",
7066                                                                hash=>$blob_current, hash_parent=>$blob_parent,
7067                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
7068                                                                file_name=>$file_name)},
7069                                                 "diff to current");
7070                         }
7071                 }
7072                 print "</td>\n" .
7073                       "</tr>\n";
7074         }
7075         if (defined $extra) {
7076                 print "<tr>\n" .
7077                       "<td colspan=\"4\">$extra</td>\n" .
7078                       "</tr>\n";
7079         }
7080         print "</table>\n";
7081 }
7082
7083 sub git_tags_body {
7084         # uses global variable $project
7085         my ($taglist, $from, $to, $extra, $head_at, $full, $order) = @_;
7086         $from = 0 unless defined $from;
7087         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
7088         $order ||= $default_refs_order;
7089
7090         print "<table class=\"tags\">\n";
7091         if ($full) {
7092                 print "<tr class=\"tags_header\">\n";
7093                 print_sort_th('age', $order, 'Last Change');
7094                 print_sort_th('name', $order, 'Name');
7095                 print "<th></th>\n" . # for comment
7096                       "<th></th>\n" . # for tag
7097                       "<th></th>\n" . # for links
7098                       "</tr>\n";
7099         }
7100         my $alternate = 1;
7101         for (my $i = $from; $i <= $to; $i++) {
7102                 my $entry = $taglist->[$i];
7103                 my %tag = %$entry;
7104                 my $comment = $tag{'subject'};
7105                 my $comment_short;
7106                 if (defined $comment) {
7107                         $comment_short = chop_str($comment, 30, 5);
7108                 }
7109                 my $curr = defined $head_at && $tag{'id'} eq $head_at;
7110                 if ($alternate) {
7111                         print "<tr class=\"dark\">\n";
7112                 } else {
7113                         print "<tr class=\"light\">\n";
7114                 }
7115                 $alternate ^= 1;
7116                 if (defined $tag{'age'}) {
7117                         print "<td><i>$tag{'age'}</i></td>\n";
7118                 } else {
7119                         print "<td></td>\n";
7120                 }
7121                 print(($curr ? "<td class=\"current_head\">" : "<td>") .
7122                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
7123                                -class => "list name"}, esc_html($tag{'name'})) .
7124                       "</td>\n" .
7125                       "<td>");
7126                 if (defined $comment) {
7127                         print format_subject_html($comment, $comment_short,
7128                                                   href(action=>"tag", hash=>$tag{'id'}));
7129                 }
7130                 print "</td>\n" .
7131                       "<td class=\"selflink\">";
7132                 if ($tag{'type'} eq "tag") {
7133                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
7134                 } else {
7135                         print "&#160;";
7136                 }
7137                 print "</td>\n" .
7138                       "<td class=\"link\">" . " | " .
7139                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
7140                 if ($tag{'reftype'} eq "commit") {
7141                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "log");
7142                         print " | " . $cgi->a({-href => href(action=>"tree", hash=>$tag{'fullname'})}, "tree") if $full;
7143                 } elsif ($tag{'reftype'} eq "blob") {
7144                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
7145                 }
7146                 print "</td>\n" .
7147                       "</tr>";
7148         }
7149         if (defined $extra) {
7150                 print "<tr>\n" .
7151                       "<td colspan=\"5\">$extra</td>\n" .
7152                       "</tr>\n";
7153         }
7154         print "</table>\n";
7155 }
7156
7157 sub git_heads_body {
7158         # uses global variable $project
7159         my ($headlist, $head_at, $from, $to, $extra) = @_;
7160         $from = 0 unless defined $from;
7161         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
7162
7163         print "<table class=\"heads\">\n";
7164         my $alternate = 1;
7165         for (my $i = $from; $i <= $to; $i++) {
7166                 my $entry = $headlist->[$i];
7167                 my %ref = %$entry;
7168                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
7169                 if ($alternate) {
7170                         print "<tr class=\"dark\">\n";
7171                 } else {
7172                         print "<tr class=\"light\">\n";
7173                 }
7174                 $alternate ^= 1;
7175                 print "<td><i>$ref{'age'}</i></td>\n" .
7176                       ($curr ? "<td class=\"current_head\">" : "<td>") .
7177                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
7178                                -class => "list name"},esc_html($ref{'name'})) .
7179                       "</td>\n" .
7180                       "<td class=\"link\">" .
7181                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "log") . " | " .
7182                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
7183                       "</td>\n" .
7184                       "</tr>";
7185         }
7186         if (defined $extra) {
7187                 print "<tr>\n" .
7188                       "<td colspan=\"3\">$extra</td>\n" .
7189                       "</tr>\n";
7190         }
7191         print "</table>\n";
7192 }
7193
7194 # Display a single remote block
7195 sub git_remote_block {
7196         my ($remote, $rdata, $limit, $head) = @_;
7197
7198         my $heads = $rdata->{'heads'};
7199         my $fetch = $rdata->{'fetch'};
7200         my $push = $rdata->{'push'};
7201
7202         my $urls_table = "<table class=\"projects_list\">\n" ;
7203
7204         if (defined $fetch) {
7205                 if ($fetch eq $push) {
7206                         $urls_table .= format_repo_url("URL", $fetch);
7207                 } else {
7208                         $urls_table .= format_repo_url("Fetch&#160;URL", $fetch);
7209                         $urls_table .= format_repo_url("Push&#160;URL", $push) if defined $push;
7210                 }
7211         } elsif (defined $push) {
7212                 $urls_table .= format_repo_url("Push&#160;URL", $push);
7213         } else {
7214                 $urls_table .= format_repo_url("", "No remote URL");
7215         }
7216
7217         $urls_table .= "</table>\n";
7218
7219         my $dots;
7220         if (defined $limit && $limit < @$heads) {
7221                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
7222         }
7223
7224         print $urls_table;
7225         git_heads_body($heads, $head, 0, $limit, $dots);
7226 }
7227
7228 # Display a list of remote names with the respective fetch and push URLs
7229 sub git_remotes_list {
7230         my ($remotedata, $limit) = @_;
7231         print "<table class=\"heads\">\n";
7232         my $alternate = 1;
7233         my @remotes = sort keys %$remotedata;
7234
7235         my $limited = $limit && $limit < @remotes;
7236
7237         $#remotes = $limit - 1 if $limited;
7238
7239         while (my $remote = shift @remotes) {
7240                 my $rdata = $remotedata->{$remote};
7241                 my $fetch = $rdata->{'fetch'};
7242                 my $push = $rdata->{'push'};
7243                 if ($alternate) {
7244                         print "<tr class=\"dark\">\n";
7245                 } else {
7246                         print "<tr class=\"light\">\n";
7247                 }
7248                 $alternate ^= 1;
7249                 print "<td>" .
7250                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
7251                                -class=> "list name"},esc_html($remote)) .
7252                       "</td>";
7253                 print "<td class=\"link\">" .
7254                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
7255                       " | " .
7256                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
7257                       "</td>";
7258
7259                 print "</tr>\n";
7260         }
7261
7262         if ($limited) {
7263                 print "<tr>\n" .
7264                       "<td colspan=\"3\">" .
7265                       $cgi->a({-href => href(action=>"remotes")}, "...") .
7266                       "</td>\n" . "</tr>\n";
7267         }
7268
7269         print "</table>";
7270 }
7271
7272 # Display remote heads grouped by remote, unless there are too many
7273 # remotes, in which case we only display the remote names
7274 sub git_remotes_body {
7275         my ($remotedata, $limit, $head) = @_;
7276         if ($limit and $limit < keys %$remotedata) {
7277                 git_remotes_list($remotedata, $limit);
7278         } else {
7279                 fill_remote_heads($remotedata);
7280                 while (my ($remote, $rdata) = each %$remotedata) {
7281                         git_print_section({-class=>"remote", -id=>$remote},
7282                                 ["remotes", $remote, $remote], sub {
7283                                         git_remote_block($remote, $rdata, $limit, $head);
7284                                 });
7285                 }
7286         }
7287 }
7288
7289 sub git_search_message {
7290         my %co = @_;
7291
7292         my $greptype;
7293         if ($searchtype eq 'commit') {
7294                 $greptype = "--grep=";
7295         } elsif ($searchtype eq 'author') {
7296                 $greptype = "--author=";
7297         } elsif ($searchtype eq 'committer') {
7298                 $greptype = "--committer=";
7299         }
7300         $greptype .= $searchtext;
7301         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7302                                        $greptype, '--regexp-ignore-case',
7303                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7304
7305         my $paging_nav = '';
7306         if ($page > 0) {
7307                 $paging_nav .=
7308                         $cgi->a({-href => href(-replay=>1, page=>undef)},
7309                                 "first") .
7310                         " &#183; " .
7311                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
7312                                  -accesskey => "p", -title => "Alt-p"}, "prev");
7313         } else {
7314                 $paging_nav .= "first &#183; prev";
7315         }
7316         my $next_link = '';
7317         if ($#commitlist >= 100) {
7318                 $next_link =
7319                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7320                                  -accesskey => "n", -title => "Alt-n"}, "next");
7321                 $paging_nav .= " &#183; $next_link";
7322         } else {
7323                 $paging_nav .= " &#183; next";
7324         }
7325
7326         git_header_html();
7327
7328         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7329         git_print_header_div('commit', esc_html($co{'title'}), $hash);
7330         if ($page == 0 && !@commitlist) {
7331                 print "<p>No match.</p>\n";
7332         } else {
7333                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
7334         }
7335
7336         git_footer_html();
7337 }
7338
7339 sub git_search_changes {
7340         my %co = @_;
7341
7342         local $/ = "\n";
7343         defined(my $fd = git_cmd_pipe '--no-pager', 'log', @diff_opts,
7344                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7345                 ($search_use_regexp ? '--pickaxe-regex' : ()))
7346                         or die_error(500, "Open git-log failed");
7347
7348         git_header_html();
7349
7350         git_print_page_nav('','', $hash,$co{'tree'},$hash);
7351         git_print_header_div('commit', esc_html($co{'title'}), $hash);
7352
7353         print "<table class=\"pickaxe search\">\n";
7354         my $alternate = 1;
7355         undef %co;
7356         my @files;
7357         while (my $line = to_utf8(scalar <$fd>)) {
7358                 chomp $line;
7359                 next unless $line;
7360
7361                 my %set = parse_difftree_raw_line($line);
7362                 if (defined $set{'commit'}) {
7363                         # finish previous commit
7364                         if (%co) {
7365                                 print "</td>\n" .
7366                                       "<td class=\"link\">" .
7367                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
7368                                               "commit") .
7369                                       " | " .
7370                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
7371                                                              hash_base=>$co{'id'})},
7372                                               "tree") .
7373                                       "</td>\n" .
7374                                       "</tr>\n";
7375                         }
7376
7377                         if ($alternate) {
7378                                 print "<tr class=\"dark\">\n";
7379                         } else {
7380                                 print "<tr class=\"light\">\n";
7381                         }
7382                         $alternate ^= 1;
7383                         %co = parse_commit($set{'commit'});
7384                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7385                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7386                               "<td><i>$author</i></td>\n" .
7387                               "<td>" .
7388                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7389                                       -class => "list subject"},
7390                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
7391                 } elsif (defined $set{'to_id'}) {
7392                         next if ($set{'to_id'} =~ m/^0{40}$/);
7393
7394                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7395                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7396                                       -class => "list"},
7397                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7398                               "<br/>\n";
7399                 }
7400         }
7401         close $fd;
7402
7403         # finish last commit (warning: repetition!)
7404         if (%co) {
7405                 print "</td>\n" .
7406                       "<td class=\"link\">" .
7407                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
7408                               "commit") .
7409                       " | " .
7410                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
7411                                              hash_base=>$co{'id'})},
7412                               "tree") .
7413                       "</td>\n" .
7414                       "</tr>\n";
7415         }
7416
7417         print "</table>\n";
7418
7419         git_footer_html();
7420 }
7421
7422 sub git_search_files {
7423         my %co = @_;
7424
7425         local $/ = "\n";
7426         defined(my $fd = git_cmd_pipe 'grep', '-n', '-z',
7427                 $search_use_regexp ? ('-E', '-i') : '-F',
7428                 $searchtext, $co{'tree'})
7429                         or die_error(500, "Open git-grep failed");
7430
7431         git_header_html();
7432
7433         git_print_page_nav('','', $hash,$co{'tree'},$hash);
7434         git_print_header_div('commit', esc_html($co{'title'}), $hash);
7435
7436         print "<table class=\"grep_search\">\n";
7437         my $alternate = 1;
7438         my $matches = 0;
7439         my $lastfile = '';
7440         my $file_href;
7441         while (my $line = to_utf8(scalar <$fd>)) {
7442                 chomp $line;
7443                 my ($file, $lno, $ltext, $binary);
7444                 last if ($matches++ > 1000);
7445                 if ($line =~ /^Binary file (.+) matches$/) {
7446                         $file = $1;
7447                         $binary = 1;
7448                 } else {
7449                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
7450                         $file =~ s/^$co{'tree'}://;
7451                 }
7452                 if ($file ne $lastfile) {
7453                         $lastfile and print "</td></tr>\n";
7454                         if ($alternate++) {
7455                                 print "<tr class=\"dark\">\n";
7456                         } else {
7457                                 print "<tr class=\"light\">\n";
7458                         }
7459                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
7460                                           file_name=>$file);
7461                         print "<td class=\"list\">".
7462                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
7463                         print "</td><td>\n";
7464                         $lastfile = $file;
7465                 }
7466                 if ($binary) {
7467                         print "<div class=\"binary\">Binary file</div>\n";
7468                 } else {
7469                         $ltext = untabify($ltext);
7470                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7471                                 $ltext = esc_html($1, -nbsp=>1);
7472                                 $ltext .= '<span class="match">';
7473                                 $ltext .= esc_html($2, -nbsp=>1);
7474                                 $ltext .= '</span>';
7475                                 $ltext .= esc_html($3, -nbsp=>1);
7476                         } else {
7477                                 $ltext = esc_html($ltext, -nbsp=>1);
7478                         }
7479                         print "<div class=\"pre\">" .
7480                                 $cgi->a({-href => $file_href.'#l'.$lno,
7481                                         -class => "linenr"}, sprintf('%4i', $lno)) .
7482                                 ' ' .  $ltext . "</div>\n";
7483                 }
7484         }
7485         if ($lastfile) {
7486                 print "</td></tr>\n";
7487                 if ($matches > 1000) {
7488                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7489                 }
7490         } else {
7491                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
7492         }
7493         close $fd;
7494
7495         print "</table>\n";
7496
7497         git_footer_html();
7498 }
7499
7500 sub git_search_grep_body {
7501         my ($commitlist, $from, $to, $extra) = @_;
7502         $from = 0 unless defined $from;
7503         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
7504
7505         print "<table class=\"commit_search\">\n";
7506         my $alternate = 1;
7507         for (my $i = $from; $i <= $to; $i++) {
7508                 my %co = %{$commitlist->[$i]};
7509                 if (!%co) {
7510                         next;
7511                 }
7512                 my $commit = $co{'id'};
7513                 if ($alternate) {
7514                         print "<tr class=\"dark\">\n";
7515                 } else {
7516                         print "<tr class=\"light\">\n";
7517                 }
7518                 $alternate ^= 1;
7519                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7520                       format_author_html('td', \%co, 15, 5) .
7521                       "<td>" .
7522                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7523                                -class => "list subject"},
7524                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7525                 my $comment = $co{'comment'};
7526                 foreach my $line (@$comment) {
7527                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
7528                                 my ($lead, $match, $trail) = ($1, $2, $3);
7529                                 $match = chop_str($match, 70, 5, 'center');
7530                                 my $contextlen = int((80 - length($match))/2);
7531                                 $contextlen = 30 if ($contextlen > 30);
7532                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
7533                                 $trail = chop_str($trail, $contextlen, 10, 'right');
7534
7535                                 $lead  = esc_html($lead);
7536                                 $match = esc_html($match);
7537                                 $trail = esc_html($trail);
7538
7539                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
7540                         }
7541                 }
7542                 print "</td>\n" .
7543                       "<td class=\"link\">" .
7544                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7545                       " | " .
7546                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
7547                       " | " .
7548                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7549                 print "</td>\n" .
7550                       "</tr>\n";
7551         }
7552         if (defined $extra) {
7553                 print "<tr>\n" .
7554                       "<td colspan=\"3\">$extra</td>\n" .
7555                       "</tr>\n";
7556         }
7557         print "</table>\n";
7558 }
7559
7560 ## ======================================================================
7561 ## ======================================================================
7562 ## actions
7563
7564 sub git_project_list_load {
7565         my $empty_list_ok = shift;
7566         my $order = $input_params{'order'};
7567         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
7568                 die_error(400, "Unknown order parameter");
7569         }
7570
7571         my @list = git_get_projects_list($project_filter, $strict_export);
7572         if ($project_filter && (!@list || !gitweb_check_feature('forks'))) {
7573                 push @list, { 'path' => "$project_filter.git" }
7574                         if is_valid_project("$project_filter.git");
7575         }
7576         if (!@list) {
7577                 die_error(404, "No projects found") unless $empty_list_ok;
7578         }
7579
7580         return (\@list, $order);
7581 }
7582
7583 sub git_frontpage {
7584         my ($projlist, $order);
7585
7586         if ($frontpage_no_project_list) {
7587                 $project = undef;
7588                 $project_filter = undef;
7589         } else {
7590                 ($projlist, $order) = git_project_list_load(1);
7591         }
7592         git_header_html();
7593         if (defined $home_text && -f $home_text) {
7594                 print "<div class=\"index_include\">\n";
7595                 insert_file($home_text);
7596                 print "</div>\n";
7597         }
7598         git_project_search_form($searchtext, $search_use_regexp);
7599         if ($frontpage_no_project_list) {
7600                 my $show_ctags = gitweb_check_feature('ctags');
7601                 if ($frontpage_no_project_list == 1 and $show_ctags) {
7602                         my @projects = git_get_projects_list($project_filter, $strict_export);
7603                         @projects = filter_forks_from_projects_list(\@projects) if gitweb_check_feature('forks');
7604                         @projects = fill_project_list_info(\@projects, 'ctags');
7605                         my $ctags = git_gather_all_ctags(\@projects);
7606                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
7607                         print git_show_project_tagcloud($cloud, 64);
7608                 }
7609         } else {
7610                 git_project_list_body($projlist, $order, undef, undef, undef, undef, undef, 1);
7611         }
7612         git_footer_html();
7613 }
7614
7615 sub git_project_list {
7616         my ($projlist, $order) = git_project_list_load();
7617         git_header_html();
7618         if (!$frontpage_no_project_list && defined $home_text && -f $home_text) {
7619                 print "<div class=\"index_include\">\n";
7620                 insert_file($home_text);
7621                 print "</div>\n";
7622         }
7623         git_project_search_form();
7624         git_project_list_body($projlist, $order, undef, undef, undef, undef, undef, 1);
7625         git_footer_html();
7626 }
7627
7628 sub git_forks {
7629         my $order = $input_params{'order'};
7630         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
7631                 die_error(400, "Unknown order parameter");
7632         }
7633
7634         my $filter = $project;
7635         $filter =~ s/\.git$//;
7636         my @list = git_get_projects_list($filter);
7637         if (!@list) {
7638                 die_error(404, "No forks found");
7639         }
7640
7641         git_header_html();
7642         git_print_page_nav('','');
7643         git_print_header_div('summary', "$project forks");
7644         git_project_list_body(\@list, $order, undef, undef, undef, undef, 'forks');
7645         git_footer_html();
7646 }
7647
7648 sub git_project_index {
7649         my @projects = git_get_projects_list($project_filter, $strict_export);
7650         if (!@projects) {
7651                 die_error(404, "No projects found");
7652         }
7653
7654         print $cgi->header(
7655                 -type => 'text/plain',
7656                 -charset => 'utf-8',
7657                 -content_disposition => 'inline; filename="index.aux"');
7658
7659         foreach my $pr (@projects) {
7660                 if (!exists $pr->{'owner'}) {
7661                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
7662                 }
7663
7664                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
7665                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
7666                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
7667                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
7668                 $path  =~ s/ /\+/g;
7669                 $owner =~ s/ /\+/g;
7670
7671                 print "$path $owner\n";
7672         }
7673 }
7674
7675 sub git_summary {
7676         my $descr = git_get_project_description($project) || "none";
7677         my %co = parse_commit("HEAD");
7678         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
7679         my $head = $co{'id'};
7680         my $remote_heads = gitweb_check_feature('remote_heads');
7681
7682         my $owner = git_get_project_owner($project);
7683         my $homepage = git_get_project_config('homepage');
7684         my $base_url = git_get_project_config('baseurl');
7685         my $last_refresh = git_get_project_config('lastrefresh');
7686
7687         my $refs = git_get_references();
7688         # These get_*_list functions return one more to allow us to see if
7689         # there are more ...
7690         my @taglist  = git_get_tags_list(16);
7691         my @headlist = git_get_heads_list(16);
7692         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
7693         my @forklist;
7694         my $check_forks = gitweb_check_feature('forks');
7695
7696         if ($check_forks) {
7697                 # find forks of a project
7698                 my $filter = $project;
7699                 $filter =~ s/\.git$//;
7700                 @forklist = git_get_projects_list($filter);
7701                 # filter out forks of forks
7702                 @forklist = filter_forks_from_projects_list(\@forklist)
7703                         if (@forklist);
7704         }
7705
7706         git_header_html();
7707         git_print_page_nav('summary','', $head);
7708
7709         if ($check_forks and $project =~ m#/#) {
7710                 my $xproject = $project; $xproject =~ s#/[^/]+$#.git#; #
7711                 my $r = $cgi->a({-href=> href(project => $xproject, action => 'summary')}, $xproject);
7712                 print <<EOT;
7713 <div class="forkinfo">
7714 This project is a fork of the $r project. If you have that one
7715 already cloned locally, you can use
7716 <pre>git clone --reference /path/to/your/$xproject/incarnation mirror_URL</pre>
7717 to save bandwidth during cloning.
7718 </div>
7719 EOT
7720         }
7721
7722         print "<div class=\"title\">&#160;</div>\n";
7723         print "<table class=\"projects_list\">\n" .
7724               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
7725         if ($homepage) {
7726                 print "<tr id=\"metadata_homepage\"><td>homepage&#160;URL</td><td>" . $cgi->a({-href => $homepage}, $homepage) . "</td></tr>\n";
7727         }
7728         if ($base_url) {
7729                 print "<tr id=\"metadata_baseurl\"><td>repository&#160;URL</td><td>" . esc_html($base_url) . "</td></tr>\n";
7730         }
7731         if ($owner and not $omit_owner) {
7732                 print "<tr id=\"metadata_owner\"><td>owner</td><td>" . ($owner_link_hook
7733                         ? $cgi->a({-href => $owner_link_hook->($owner)}, email_obfuscate($owner))
7734                         : email_obfuscate($owner)) . "</td></tr>\n";
7735         }
7736         if (defined $cd{'rfc2822'}) {
7737                 print "<tr id=\"metadata_lchange\"><td>last&#160;change</td>" .
7738                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
7739         }
7740         if (defined $last_refresh) {
7741                 my %rd = parse_date_rfc2822($last_refresh);
7742                 print "<tr id=\"metadata_lrefresh\"><td>last&#160;refresh</td>" .
7743                       "<td>".format_timestamp_html(\%rd)."</td></tr>\n"
7744                 if defined $rd{'rfc2822'};
7745         }
7746
7747         # use per project git URL list in $projectroot/$project/cloneurl
7748         # or make project git URL from git base URL and project name
7749         my $url_tag = $base_url ? "mirror&#160;URL" : "URL";
7750         my @url_list = git_get_project_url_list($project);
7751         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
7752         foreach my $git_url (@url_list) {
7753                 next unless $git_url;
7754                 print format_repo_url($url_tag, $git_url);
7755                 $url_tag = "";
7756         }
7757         @url_list = map { "$_/$project" } @git_base_push_urls;
7758         if ((git_get_project_config("showpush", '--bool')||'false') eq "true" ||
7759             -f "$projectroot/$project/.nofetch") {
7760                 $url_tag = "Push&#160;URL";
7761                 foreach my $git_push_url (@url_list) {
7762                         next unless $git_push_url;
7763                         my $hint = $https_hint_html && $git_push_url =~ /^https:/i ?
7764                                 "&#160;$https_hint_html" : '';
7765                         print "<tr class=\"metadata_pushurl\"><td>$url_tag</td><td>$git_push_url$hint</td></tr>\n";
7766                         $url_tag = "";
7767                 }
7768         }
7769
7770         # Tag cloud
7771         my $show_ctags = gitweb_check_feature('ctags');
7772         if ($show_ctags) {
7773                 my $ctags = git_get_project_ctags($project);
7774                 if (%$ctags || $show_ctags !~ /^\d+$/) {
7775                         # without ability to add tags, don't show if there are none
7776                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
7777                         print "<tr id=\"metadata_ctags\">" .
7778                               "<td style=\"vertical-align:middle\">content&#160;tags<br />";
7779                         print "</td>\n<td>" unless %$ctags;
7780                         print "<form action=\"$show_ctags\" method=\"post\" style=\"white-space:nowrap\">" .
7781                               "<input type=\"hidden\" name=\"p\" value=\"$project\"/>" .
7782                               "add: <input type=\"text\" name=\"t\" size=\"8\" /></form>"
7783                               unless $show_ctags =~ /^\d+$/;
7784                         print "</td>\n<td>" if %$ctags;
7785                         print git_show_project_tagcloud($cloud, 48)."</td>" .
7786                               "</tr>\n";
7787                 }
7788         }
7789
7790         print "</table>\n";
7791
7792         # If XSS prevention is on, we don't include README.html.
7793         # TODO: Allow a readme in some safe format.
7794         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
7795                 print "<div class=\"title\">readme</div>\n" .
7796                       "<div class=\"readme\">\n";
7797                 insert_file("$projectroot/$project/README.html");
7798                 print "\n</div>\n"; # class="readme"
7799         }
7800
7801         # we need to request one more than 16 (0..15) to check if
7802         # those 16 are all
7803         my @commitlist = $head ? parse_commits($head, 17) : ();
7804         if (@commitlist) {
7805                 git_print_header_div('shortlog');
7806                 git_shortlog_body(\@commitlist, 0, 15, $refs,
7807                                   $#commitlist <=  15 ? undef :
7808                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
7809         }
7810
7811         if (@taglist) {
7812                 git_print_header_div('tags');
7813                 git_tags_body(\@taglist, 0, 15,
7814                               $#taglist <=  15 ? undef :
7815                               $cgi->a({-href => href(action=>"tags")}, "..."));
7816         }
7817
7818         if (@headlist) {
7819                 git_print_header_div('heads');
7820                 git_heads_body(\@headlist, $head, 0, 15,
7821                                $#headlist <= 15 ? undef :
7822                                $cgi->a({-href => href(action=>"heads")}, "..."));
7823         }
7824
7825         if (%remotedata) {
7826                 git_print_header_div('remotes');
7827                 git_remotes_body(\%remotedata, 15, $head);
7828         }
7829
7830         if (@forklist) {
7831                 git_print_header_div('forks');
7832                 git_project_list_body(\@forklist, 'age', 0, 15,
7833                                       $#forklist <= 15 ? undef :
7834                                       $cgi->a({-href => href(action=>"forks")}, "..."),
7835                                       'no_header', 'forks');
7836         }
7837
7838         git_footer_html();
7839 }
7840
7841 sub git_tag {
7842         my %tag = parse_tag($hash);
7843
7844         if (! %tag) {
7845                 die_error(404, "Unknown tag object");
7846         }
7847
7848         my $fullhash;
7849         $fullhash = $hash if $hash =~ m/^[0-9a-fA-F]{40}$/;
7850         $fullhash = git_get_full_hash($project, $hash) unless $fullhash;
7851
7852         my $head = git_get_head_hash($project);
7853         git_header_html();
7854         git_print_page_nav('','', $head,undef,$head);
7855         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
7856         print "<div class=\"title_text\">\n" .
7857               "<table class=\"object_header\">\n" .
7858               "<tr><td>tag</td><td class=\"sha1\">$fullhash</td></tr>\n" .
7859               "<tr>\n" .
7860               "<td>object</td>\n" .
7861               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
7862                                $tag{'object'}) . "</td>\n" .
7863               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
7864                                               $tag{'type'}) . "</td>\n" .
7865               "</tr>\n";
7866         if (defined($tag{'author'})) {
7867                 git_print_authorship_rows(\%tag, 'author');
7868         }
7869         print "</table>\n\n" .
7870               "</div>\n";
7871         print "<div class=\"page_body\">";
7872         my $comment = $tag{'comment'};
7873         foreach my $line (@$comment) {
7874                 chomp $line;
7875                 print esc_html($line, -nbsp=>1) . "<br/>\n";
7876         }
7877         print "</div>\n";
7878         git_footer_html();
7879 }
7880
7881 sub git_blame_common {
7882         my $format = shift || 'porcelain';
7883         if ($format eq 'porcelain' && $input_params{'javascript'}) {
7884                 $format = 'incremental';
7885                 $action = 'blame_incremental'; # for page title etc
7886         }
7887
7888         # permissions
7889         gitweb_check_feature('blame')
7890                 or die_error(403, "Blame view not allowed");
7891
7892         # error checking
7893         die_error(400, "No file name given") unless $file_name;
7894         $hash_base ||= git_get_head_hash($project);
7895         die_error(404, "Couldn't find base commit") unless $hash_base;
7896         my %co = parse_commit($hash_base)
7897                 or die_error(404, "Commit not found");
7898         my $ftype = "blob";
7899         if (!defined $hash) {
7900                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
7901                         or die_error(404, "Error looking up file");
7902         } else {
7903                 $ftype = git_get_type($hash);
7904                 if ($ftype !~ "blob") {
7905                         die_error(400, "Object is not a blob");
7906                 }
7907         }
7908
7909         my $fd;
7910         if ($format eq 'incremental') {
7911                 # get file contents (as base)
7912                 defined($fd = git_cmd_pipe 'cat-file', 'blob', $hash)
7913                         or die_error(500, "Open git-cat-file failed");
7914         } elsif ($format eq 'data') {
7915                 # run git-blame --incremental
7916                 defined($fd = git_cmd_pipe "blame", "--incremental",
7917                         $hash_base, "--", $file_name)
7918                         or die_error(500, "Open git-blame --incremental failed");
7919         } else {
7920                 # run git-blame --porcelain
7921                 defined($fd = git_cmd_pipe "blame", '-p',
7922                         $hash_base, '--', $file_name)
7923                         or die_error(500, "Open git-blame --porcelain failed");
7924         }
7925
7926         # incremental blame data returns early
7927         if ($format eq 'data') {
7928                 print $cgi->header(
7929                         -type=>"text/plain", -charset => "utf-8",
7930                         -status=> "200 OK");
7931                 local $| = 1; # output autoflush
7932                 while (<$fd>) {
7933                         print to_utf8($_);
7934                 }
7935                 close $fd
7936                         or print "ERROR $!\n";
7937
7938                 print 'END';
7939                 if (defined $t0 && gitweb_check_feature('timed')) {
7940                         print ' '.
7941                               tv_interval($t0, [ gettimeofday() ]).
7942                               ' '.$number_of_git_cmds;
7943                 }
7944                 print "\n";
7945
7946                 return;
7947         }
7948
7949         # page header
7950         git_header_html();
7951         my $formats_nav =
7952                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
7953                         "blob");
7954         $formats_nav .=
7955                 " | " .
7956                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7957                         "history") .
7958                 " | " .
7959                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
7960                         "HEAD");
7961         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7962         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7963         git_print_page_path($file_name, $ftype, $hash_base);
7964
7965         # page body
7966         if ($format eq 'incremental') {
7967                 print "<noscript>\n<div class=\"error\"><center><b>\n".
7968                       "This page requires JavaScript to run.\n Use ".
7969                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
7970                               'this page').
7971                       " instead.\n".
7972                       "</b></center></div>\n</noscript>\n";
7973
7974                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
7975         }
7976
7977         print qq!<div class="page_body">\n!;
7978         print qq!<div id="progress_info">... / ...</div>\n!
7979                 if ($format eq 'incremental');
7980         print qq!<table id="blame_table" class="blame" width="100%">\n!.
7981               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
7982               qq!<thead>\n!.
7983               qq!<tr><th nowrap="nowrap" style="white-space:nowrap">!.
7984               qq!Commit&#160;<a href="javascript:extra_blame_columns()" id="columns_expander" !.
7985               qq!title="toggles blame author information display">[+]</a></th>!.
7986               qq!<th class="extra_column">Author</th><th class="extra_column">Date</th>!.
7987               qq!<th>Line</th><th width="100%">Data</th></tr>\n!.
7988               qq!</thead>\n!.
7989               qq!<tbody>\n!;
7990
7991         my @rev_color = qw(light dark);
7992         my $num_colors = scalar(@rev_color);
7993         my $current_color = 0;
7994
7995         if ($format eq 'incremental') {
7996                 my $color_class = $rev_color[$current_color];
7997
7998                 #contents of a file
7999                 my $linenr = 0;
8000         LINE:
8001                 while (my $line = to_utf8(scalar <$fd>)) {
8002                         chomp $line;
8003                         $linenr++;
8004
8005                         print qq!<tr id="l$linenr" class="$color_class">!.
8006                               qq!<td class="sha1"><a href=""> </a></td>!.
8007                               qq!<td class="extra_column" nowrap="nowrap"></td>!.
8008                               qq!<td class="extra_column" nowrap="nowrap"></td>!.
8009                               qq!<td class="linenr">!.
8010                               qq!<a class="linenr" href="">$linenr</a></td>!;
8011                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
8012                         print qq!</tr>\n!;
8013                 }
8014
8015         } else { # porcelain, i.e. ordinary blame
8016                 my %metainfo = (); # saves information about commits
8017
8018                 # blame data
8019         LINE:
8020                 while (my $line = to_utf8(scalar <$fd>)) {
8021                         chomp $line;
8022                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
8023                         # no <lines in group> for subsequent lines in group of lines
8024                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
8025                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
8026                         if (!exists $metainfo{$full_rev}) {
8027                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
8028                         }
8029                         my $meta = $metainfo{$full_rev};
8030                         my $data;
8031                         while ($data = to_utf8(scalar <$fd>)) {
8032                                 chomp $data;
8033                                 last if ($data =~ s/^\t//); # contents of line
8034                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
8035                                         $meta->{$1} = $2 unless exists $meta->{$1};
8036                                 }
8037                                 if ($data =~ /^previous /) {
8038                                         $meta->{'nprevious'}++;
8039                                 }
8040                         }
8041                         my $short_rev = substr($full_rev, 0, 8);
8042                         my $author = $meta->{'author'};
8043                         my %date =
8044                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
8045                         my $date = $date{'iso-tz'};
8046                         if ($group_size) {
8047                                 $current_color = ($current_color + 1) % $num_colors;
8048                         }
8049                         my $tr_class = $rev_color[$current_color];
8050                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
8051                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
8052                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
8053                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
8054                         if ($group_size) {
8055                                 my $rowspan = $group_size > 1 ? " rowspan=\"$group_size\"" : "";
8056                                 print "<td class=\"sha1\"";
8057                                 print " title=\"". esc_html($author) . ", $date\"";
8058                                 print "$rowspan>";
8059                                 print $cgi->a({-href => href(action=>"commit",
8060                                                              hash=>$full_rev,
8061                                                              file_name=>$file_name)},
8062                                               esc_html($short_rev));
8063                                 if ($group_size >= 2) {
8064                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
8065                                         if (@author_initials) {
8066                                                 print "<br />" .
8067                                                       esc_html(join('', @author_initials));
8068                                                 #           or join('.', ...)
8069                                         }
8070                                 }
8071                                 print "</td>\n";
8072                                 print "<td class=\"extra_column\" nowrap=\"nowrap\"$rowspan>". esc_html($author) . "</td>";
8073                                 print "<td class=\"extra_column\" nowrap=\"nowrap\"$rowspan>". $date . "</td>";
8074                         }
8075                         # 'previous' <sha1 of parent commit> <filename at commit>
8076                         if (exists $meta->{'previous'} &&
8077                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
8078                                 $meta->{'parent'} = $1;
8079                                 $meta->{'file_parent'} = unquote($2);
8080                         }
8081                         my $linenr_commit =
8082                                 exists($meta->{'parent'}) ?
8083                                 $meta->{'parent'} : $full_rev;
8084                         my $linenr_filename =
8085                                 exists($meta->{'file_parent'}) ?
8086                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
8087                         my $blamed = href(action => 'blame',
8088                                           file_name => $linenr_filename,
8089                                           hash_base => $linenr_commit);
8090                         print "<td class=\"linenr\">";
8091                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
8092                                         -class => "linenr" },
8093                                       esc_html($lineno));
8094                         print "</td>";
8095                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
8096                         print "</tr>\n";
8097                 } # end while
8098
8099         }
8100
8101         # footer
8102         print "</tbody>\n".
8103               "</table>\n"; # class="blame"
8104         print "</div>\n";   # class="blame_body"
8105         close $fd
8106                 or print "Reading blob failed\n";
8107
8108         git_footer_html();
8109 }
8110
8111 sub git_blame {
8112         git_blame_common();
8113 }
8114
8115 sub git_blame_incremental {
8116         git_blame_common('incremental');
8117 }
8118
8119 sub git_blame_data {
8120         git_blame_common('data');
8121 }
8122
8123 sub git_tags {
8124         my $head = git_get_head_hash($project);
8125         git_header_html();
8126         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
8127         git_print_header_div('summary', $project);
8128
8129         my @tagslist = git_get_tags_list();
8130         if (@tagslist) {
8131                 git_tags_body(\@tagslist);
8132         }
8133         git_footer_html();
8134 }
8135
8136 sub git_refs {
8137         my $order = $input_params{'order'};
8138         if (defined $order && $order !~ m/age|name/) {
8139                 die_error(400, "Unknown order parameter");
8140         }
8141
8142         my $head = git_get_head_hash($project);
8143         git_header_html();
8144         git_print_page_nav('','', $head,undef,$head,format_ref_views('refs'));
8145         git_print_header_div('summary', $project);
8146
8147         my @refslist = git_get_tags_list(undef, 1, $order);
8148         if (@refslist) {
8149                 git_tags_body(\@refslist, undef, undef, undef, $head, 1, $order);
8150         }
8151         git_footer_html();
8152 }
8153
8154 sub git_heads {
8155         my $head = git_get_head_hash($project);
8156         git_header_html();
8157         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
8158         git_print_header_div('summary', $project);
8159
8160         my @headslist = git_get_heads_list();
8161         if (@headslist) {
8162                 git_heads_body(\@headslist, $head);
8163         }
8164         git_footer_html();
8165 }
8166
8167 # used both for single remote view and for list of all the remotes
8168 sub git_remotes {
8169         gitweb_check_feature('remote_heads')
8170                 or die_error(403, "Remote heads view is disabled");
8171
8172         my $head = git_get_head_hash($project);
8173         my $remote = $input_params{'hash'};
8174
8175         my $remotedata = git_get_remotes_list($remote);
8176         die_error(500, "Unable to get remote information") unless defined $remotedata;
8177
8178         unless (%$remotedata) {
8179                 die_error(404, defined $remote ?
8180                         "Remote $remote not found" :
8181                         "No remotes found");
8182         }
8183
8184         git_header_html(undef, undef, -action_extra => $remote);
8185         git_print_page_nav('', '',  $head, undef, $head,
8186                 format_ref_views($remote ? '' : 'remotes'));
8187
8188         fill_remote_heads($remotedata);
8189         if (defined $remote) {
8190                 git_print_header_div('remotes', "$remote remote for $project");
8191                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
8192         } else {
8193                 git_print_header_div('summary', "$project remotes");
8194                 git_remotes_body($remotedata, undef, $head);
8195         }
8196
8197         git_footer_html();
8198 }
8199
8200 sub git_blob_plain {
8201         my $type = shift;
8202         my $expires;
8203
8204         if (!defined $hash) {
8205                 if (defined $file_name) {
8206                         my $base = $hash_base || git_get_head_hash($project);
8207                         $hash = git_get_hash_by_path($base, $file_name, "blob")
8208                                 or die_error(404, "Cannot find file");
8209                 } else {
8210                         die_error(400, "No file name defined");
8211                 }
8212         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8213                 # blobs defined by non-textual hash id's can be cached
8214                 $expires = "+1d";
8215         }
8216
8217         defined(my $fd = git_cmd_pipe "cat-file", "blob", $hash)
8218                 or die_error(500, "Open git-cat-file blob '$hash' failed");
8219         binmode($fd);
8220
8221         # content-type (can include charset)
8222         my $leader;
8223         ($type, $leader) = blob_contenttype($fd, $file_name, $type);
8224
8225         # "save as" filename, even when no $file_name is given
8226         my $save_as = "$hash";
8227         if (defined $file_name) {
8228                 $save_as = $file_name;
8229         } elsif ($type =~ m/^text\//) {
8230                 $save_as .= '.txt';
8231         }
8232
8233         # With XSS prevention on, blobs of all types except a few known safe
8234         # ones are served with "Content-Disposition: attachment" to make sure
8235         # they don't run in our security domain.  For certain image types,
8236         # blob view writes an <img> tag referring to blob_plain view, and we
8237         # want to be sure not to break that by serving the image as an
8238         # attachment (though Firefox 3 doesn't seem to care).
8239         my $sandbox = $prevent_xss &&
8240                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
8241
8242         # serve text/* as text/plain
8243         if ($prevent_xss &&
8244             ($type =~ m!^text/[a-z]+\b(.*)$! ||
8245              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
8246                 my $rest = $1;
8247                 $rest = defined $rest ? $rest : '';
8248                 $type = "text/plain$rest";
8249         }
8250
8251         print $cgi->header(
8252                 -type => $type,
8253                 -expires => $expires,
8254                 -content_disposition =>
8255                         ($sandbox ? 'attachment' : 'inline')
8256                         . '; filename="' . $save_as . '"');
8257         binmode STDOUT, ':raw';
8258         $fcgi_raw_mode = 1;
8259         print $leader if defined $leader;
8260         my $buf;
8261         while (read($fd, $buf, 32768)) {
8262                 print $buf;
8263         }
8264         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
8265         $fcgi_raw_mode = 0;
8266         close $fd;
8267 }
8268
8269 sub git_blob {
8270         my $expires;
8271
8272         my $fullhash;
8273         if (!defined $hash) {
8274                 if (defined $file_name) {
8275                         my $base = $hash_base || git_get_head_hash($project);
8276                         $hash = git_get_hash_by_path($base, $file_name, "blob")
8277                                 or die_error(404, "Cannot find file");
8278                         $fullhash = $hash;
8279                 } else {
8280                         die_error(400, "No file name defined");
8281                 }
8282         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8283                 # blobs defined by non-textual hash id's can be cached
8284                 $expires = "+1d";
8285                 $fullhash = $hash;
8286         }
8287         $fullhash = git_get_full_hash($project, $hash) unless $fullhash;
8288
8289         my $have_blame = gitweb_check_feature('blame');
8290         defined(my $fd = git_cmd_pipe "cat-file", "blob", $hash)
8291                 or die_error(500, "Couldn't cat $file_name, $hash");
8292         binmode($fd);
8293         my $mimetype = blob_mimetype($fd, $file_name);
8294         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
8295         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
8296                 close $fd;
8297                 return git_blob_plain($mimetype);
8298         }
8299         # we can have blame only for text/* mimetype
8300         $have_blame &&= ($mimetype =~ m!^text/!);
8301
8302         my $highlight = gitweb_check_feature('highlight') && defined $highlight_bin;
8303         my $syntax = guess_file_syntax($fd, $mimetype, $file_name) if $highlight;
8304         my $highlight_mode_active;
8305         ($fd, $highlight_mode_active) = run_highlighter($fd, $syntax) if $syntax;
8306
8307         git_header_html(undef, $expires);
8308         my $formats_nav = '';
8309         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
8310                 if (defined $file_name) {
8311                         if ($have_blame) {
8312                                 $formats_nav .=
8313                                         $cgi->a({-href => href(action=>"blame", -replay=>1),
8314                                                 -class => "blamelink"},
8315                                                 "blame") .
8316                                         " | ";
8317                         }
8318                         $formats_nav .=
8319                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
8320                                         "history") .
8321                                 " | " .
8322                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
8323                                         "raw") .
8324                                 " | " .
8325                                 $cgi->a({-href => href(action=>"blob",
8326                                                        hash_base=>"HEAD", file_name=>$file_name)},
8327                                         "HEAD");
8328                 } else {
8329                         $formats_nav .=
8330                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
8331                                         "raw");
8332                 }
8333                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
8334                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
8335         } else {
8336                 print "<div class=\"page_nav\">\n" .
8337                       "<br/><br/></div>\n" .
8338                       "<div class=\"title\">".esc_html($hash)."</div>\n";
8339         }
8340         git_print_page_path($file_name, "blob", $hash_base);
8341         print "<div class=\"title_text\">\n" .
8342               "<table class=\"object_header\">\n";
8343         print "<tr><td>blob</td><td class=\"sha1\">$fullhash</td></tr>\n";
8344         print "</table>".
8345               "</div>\n";
8346         print "<div class=\"page_body\">\n";
8347         if ($mimetype =~ m!^image/!) {
8348                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
8349                 if ($file_name) {
8350                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
8351                 }
8352                 print qq! src="! .
8353                       href(action=>"blob_plain", hash=>$hash,
8354                            hash_base=>$hash_base, file_name=>$file_name) .
8355                       qq!" />\n!;
8356         } else {
8357                 my $nr;
8358                 while (my $line = to_utf8(scalar <$fd>)) {
8359                         chomp $line;
8360                         $nr++;
8361                         $line = untabify($line);
8362                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
8363                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
8364                                $highlight_mode_active ? sanitize($line) : esc_html($line, -nbsp=>1);
8365                 }
8366         }
8367         close $fd
8368                 or print "Reading blob failed.\n";
8369         print "</div>";
8370         git_footer_html();
8371 }
8372
8373 sub git_tree {
8374         my $fullhash;
8375         if (!defined $hash_base) {
8376                 $hash_base = "HEAD";
8377         }
8378         if (!defined $hash) {
8379                 if (defined $file_name) {
8380                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
8381                         $fullhash = $hash;
8382                 } else {
8383                         $hash = $hash_base;
8384                 }
8385         }
8386         die_error(404, "No such tree") unless defined($hash);
8387         $fullhash = $hash if !$fullhash && $hash =~ m/^[0-9a-fA-F]{40}$/;
8388         $fullhash = git_get_full_hash($project, $hash) unless $fullhash;
8389
8390         my $show_sizes = gitweb_check_feature('show-sizes');
8391         my $have_blame = gitweb_check_feature('blame');
8392
8393         my @entries = ();
8394         {
8395                 local $/ = "\0";
8396                 defined(my $fd = git_cmd_pipe "ls-tree", '-z',
8397                         ($show_sizes ? '-l' : ()), @extra_options, $hash)
8398                         or die_error(500, "Open git-ls-tree failed");
8399                 @entries = map { chomp; to_utf8($_) } <$fd>;
8400                 close $fd
8401                         or die_error(404, "Reading tree failed");
8402         }
8403
8404         git_header_html();
8405         my $basedir = '';
8406         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
8407                 my $refs = git_get_references();
8408                 my $ref = format_ref_marker($refs, $co{'id'});
8409                 my @views_nav = ();
8410                 if (defined $file_name) {
8411                         push @views_nav,
8412                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
8413                                         "history"),
8414                                 $cgi->a({-href => href(action=>"tree",
8415                                                        hash_base=>"HEAD", file_name=>$file_name)},
8416                                         "HEAD"),
8417                 }
8418                 my $snapshot_links = format_snapshot_links($hash);
8419                 if (defined $snapshot_links) {
8420                         # FIXME: Should be available when we have no hash base as well.
8421                         push @views_nav, $snapshot_links;
8422                 }
8423                 git_print_page_nav('tree','', $hash_base, undef, undef,
8424                                    join(' | ', @views_nav));
8425                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base, undef, $ref);
8426         } else {
8427                 undef $hash_base;
8428                 print "<div class=\"page_nav\">\n";
8429                 print "<br/><br/></div>\n";
8430                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
8431         }
8432         if (defined $file_name) {
8433                 $basedir = $file_name;
8434                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
8435                         $basedir .= '/';
8436                 }
8437                 git_print_page_path($file_name, 'tree', $hash_base);
8438         }
8439         print "<div class=\"title_text\">\n" .
8440               "<table class=\"object_header\">\n";
8441         print "<tr><td>tree</td><td class=\"sha1\">$fullhash</td></tr>\n";
8442         print "</table>".
8443               "</div>\n";
8444         print "<div class=\"page_body\">\n";
8445         print "<table class=\"tree\">\n";
8446         my $alternate = 1;
8447         # '..' (top directory) link if possible
8448         if (defined $hash_base &&
8449             defined $file_name && $file_name =~ m![^/]+$!) {
8450                 if ($alternate) {
8451                         print "<tr class=\"dark\">\n";
8452                 } else {
8453                         print "<tr class=\"light\">\n";
8454                 }
8455                 $alternate ^= 1;
8456
8457                 my $up = $file_name;
8458                 $up =~ s!/?[^/]+$!!;
8459                 undef $up unless $up;
8460                 # based on git_print_tree_entry
8461                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
8462                 print '<td class="size">&#160;</td>'."\n" if $show_sizes;
8463                 print '<td class="list">';
8464                 print $cgi->a({-href => href(action=>"tree",
8465                                              hash_base=>$hash_base,
8466                                              file_name=>$up)},
8467                               "..");
8468                 print "</td>\n";
8469                 print "<td class=\"link\"></td>\n";
8470
8471                 print "</tr>\n";
8472         }
8473         foreach my $line (@entries) {
8474                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
8475
8476                 if ($alternate) {
8477                         print "<tr class=\"dark\">\n";
8478                 } else {
8479                         print "<tr class=\"light\">\n";
8480                 }
8481                 $alternate ^= 1;
8482
8483                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
8484
8485                 print "</tr>\n";
8486         }
8487         print "</table>\n" .
8488               "</div>";
8489         git_footer_html();
8490 }
8491
8492 sub sanitize_for_filename {
8493     my $name = shift;
8494
8495     $name =~ s!/!-!g;
8496     $name =~ s/[^[:alnum:]_.-]//g;
8497
8498     return $name;
8499 }
8500
8501 sub snapshot_name {
8502         my ($project, $hash) = @_;
8503
8504         # path/to/project.git  -> project
8505         # path/to/project/.git -> project
8506         my $name = to_utf8($project);
8507         $name =~ s,([^/])/*\.git$,$1,;
8508         $name = sanitize_for_filename(basename($name));
8509
8510         my $ver = $hash;
8511         if ($hash =~ /^[0-9a-fA-F]+$/) {
8512                 # shorten SHA-1 hash
8513                 my $full_hash = git_get_full_hash($project, $hash);
8514                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
8515                         $ver = git_get_short_hash($project, $hash);
8516                 }
8517         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
8518                 # tags don't need shortened SHA-1 hash
8519                 $ver = $1;
8520         } else {
8521                 # branches and other need shortened SHA-1 hash
8522                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
8523                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
8524                         my $ref_dir = (defined $1) ? $1 : '';
8525                         $ver = $2;
8526
8527                         $ref_dir = sanitize_for_filename($ref_dir);
8528                         # for refs neither in heads nor remotes we want to
8529                         # add a ref dir to archive name
8530                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
8531                                 $ver = $ref_dir . '-' . $ver;
8532                         }
8533                 }
8534                 $ver .= '-' . git_get_short_hash($project, $hash);
8535         }
8536         # special case of sanitization for filename - we change
8537         # slashes to dots instead of dashes
8538         # in case of hierarchical branch names
8539         $ver =~ s!/!.!g;
8540         $ver =~ s/[^[:alnum:]_.-]//g;
8541
8542         # name = project-version_string
8543         $name = "$name-$ver";
8544
8545         return wantarray ? ($name, $name) : $name;
8546 }
8547
8548 sub exit_if_unmodified_since {
8549         my ($latest_epoch) = @_;
8550         our $cgi;
8551
8552         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
8553         if (defined $if_modified) {
8554                 my $since;
8555                 if (eval { require HTTP::Date; 1; }) {
8556                         $since = HTTP::Date::str2time($if_modified);
8557                 } elsif (eval { require Time::ParseDate; 1; }) {
8558                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
8559                 }
8560                 if (defined $since && $latest_epoch <= $since) {
8561                         my %latest_date = parse_date($latest_epoch);
8562                         print $cgi->header(
8563                                 -last_modified => $latest_date{'rfc2822'},
8564                                 -status => '304 Not Modified');
8565                         goto DONE_GITWEB;
8566                 }
8567         }
8568 }
8569
8570 sub git_snapshot {
8571         my $format = $input_params{'snapshot_format'};
8572         if (!@snapshot_fmts) {
8573                 die_error(403, "Snapshots not allowed");
8574         }
8575         # default to first supported snapshot format
8576         $format ||= $snapshot_fmts[0];
8577         if ($format !~ m/^[a-z0-9]+$/) {
8578                 die_error(400, "Invalid snapshot format parameter");
8579         } elsif (!exists($known_snapshot_formats{$format})) {
8580                 die_error(400, "Unknown snapshot format");
8581         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
8582                 die_error(403, "Snapshot format not allowed");
8583         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
8584                 die_error(403, "Unsupported snapshot format");
8585         }
8586
8587         my $type = git_get_type("$hash^{}");
8588         if (!$type) {
8589                 die_error(404, 'Object does not exist');
8590         }  elsif ($type eq 'blob') {
8591                 die_error(400, 'Object is not a tree-ish');
8592         }
8593
8594         my ($name, $prefix) = snapshot_name($project, $hash);
8595         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
8596
8597         my %co = parse_commit($hash);
8598         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
8599
8600         my @cmd = (
8601                 git_cmd(), 'archive',
8602                 "--format=$known_snapshot_formats{$format}{'format'}",
8603                 "--prefix=$prefix/", $hash);
8604         if (exists $known_snapshot_formats{$format}{'compressor'}) {
8605                 @cmd = ($posix_shell_bin, '-c', quote_command(@cmd) .
8606                         ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}}));
8607         }
8608
8609         $filename =~ s/(["\\])/\\$1/g;
8610         my %latest_date;
8611         if (%co) {
8612                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
8613         }
8614
8615         print $cgi->header(
8616                 -type => $known_snapshot_formats{$format}{'type'},
8617                 -content_disposition => 'inline; filename="' . $filename . '"',
8618                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
8619                 -status => '200 OK');
8620
8621         defined(my $fd = cmd_pipe @cmd)
8622                 or die_error(500, "Execute git-archive failed");
8623         binmode($fd);
8624         binmode STDOUT, ':raw';
8625         $fcgi_raw_mode = 1;
8626         my $buf;
8627         while (read($fd, $buf, 32768)) {
8628                 print $buf;
8629         }
8630         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
8631         $fcgi_raw_mode = 0;
8632         close $fd;
8633 }
8634
8635 sub git_log_generic {
8636         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
8637
8638         my $head = git_get_head_hash($project);
8639         if (!defined $base) {
8640                 $base = $head;
8641         }
8642         if (!defined $page) {
8643                 $page = 0;
8644         }
8645         my $refs = git_get_references();
8646
8647         my $commit_hash = $base;
8648         if (defined $parent) {
8649                 $commit_hash = "$parent..$base";
8650         }
8651         my @commitlist =
8652                 parse_commits($commit_hash, 101, (100 * $page),
8653                               defined $file_name ? ($file_name, "--full-history") : ());
8654
8655         my $ftype;
8656         if (!defined $file_hash && defined $file_name) {
8657                 # some commits could have deleted file in question,
8658                 # and not have it in tree, but one of them has to have it
8659                 for (my $i = 0; $i < @commitlist; $i++) {
8660                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
8661                         last if defined $file_hash;
8662                 }
8663         }
8664         if (defined $file_hash) {
8665                 $ftype = git_get_type($file_hash);
8666         }
8667         if (defined $file_name && !defined $ftype) {
8668                 die_error(500, "Unknown type of object");
8669         }
8670         my %co;
8671         if (defined $file_name) {
8672                 %co = parse_commit($base)
8673                         or die_error(404, "Unknown commit object");
8674         }
8675
8676
8677         my $paging_nav = format_log_nav($fmt_name, $page, $#commitlist >= 100);
8678         my $next_link = '';
8679         if ($#commitlist >= 100) {
8680                 $next_link =
8681                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
8682                                  -accesskey => "n", -title => "Alt-n"}, "next");
8683         }
8684         my ($patch_max) = gitweb_get_feature('patches');
8685         if ($patch_max && !defined $file_name) {
8686                 if ($patch_max < 0 || @commitlist <= $patch_max) {
8687                         $paging_nav .= " &#183; " .
8688                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
8689                                         "patches");
8690                 }
8691         }
8692
8693         {
8694                 local $action = 'fulllog';
8695                 git_header_html();
8696         }
8697         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
8698         if (defined $file_name) {
8699                 git_print_header_div('commit', esc_html($co{'title'}), $base);
8700         } else {
8701                 git_print_header_div('summary', $project)
8702         }
8703         git_print_page_path($file_name, $ftype, $hash_base)
8704                 if (defined $file_name);
8705
8706         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
8707                      $file_name, $file_hash, $ftype);
8708
8709         git_footer_html();
8710 }
8711
8712 sub git_log {
8713         git_log_generic('log', \&git_log_body,
8714                         $hash, $hash_parent);
8715 }
8716
8717 sub git_commit {
8718         $hash ||= $hash_base || "HEAD";
8719         my %co = parse_commit($hash)
8720             or die_error(404, "Unknown commit object");
8721
8722         my $parent  = $co{'parent'};
8723         my $parents = $co{'parents'}; # listref
8724
8725         # we need to prepare $formats_nav before any parameter munging
8726         my $formats_nav;
8727         if (!defined $parent) {
8728                 # --root commitdiff
8729                 $formats_nav .= '(initial)';
8730         } elsif (@$parents == 1) {
8731                 # single parent commit
8732                 $formats_nav .=
8733                         '(parent: ' .
8734                         $cgi->a({-href => href(action=>"commit",
8735                                                hash=>$parent)},
8736                                 esc_html(substr($parent, 0, 7))) .
8737                         ')';
8738         } else {
8739                 # merge commit
8740                 $formats_nav .=
8741                         '(merge: ' .
8742                         join(' ', map {
8743                                 $cgi->a({-href => href(action=>"commit",
8744                                                        hash=>$_)},
8745                                         esc_html(substr($_, 0, 7)));
8746                         } @$parents ) .
8747                         ')';
8748         }
8749         if (gitweb_check_feature('patches') && @$parents <= 1) {
8750                 $formats_nav .= " | " .
8751                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
8752                                 "patch");
8753         }
8754
8755         if (!defined $parent) {
8756                 $parent = "--root";
8757         }
8758         my @difftree;
8759         defined(my $fd = git_cmd_pipe "diff-tree", '-r', "--no-commit-id",
8760                 @diff_opts,
8761                 (@$parents <= 1 ? $parent : '-c'),
8762                 $hash, "--")
8763                 or die_error(500, "Open git-diff-tree failed");
8764         @difftree = map { chomp; to_utf8($_) } <$fd>;
8765         close $fd or die_error(404, "Reading git-diff-tree failed");
8766
8767         # non-textual hash id's can be cached
8768         my $expires;
8769         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8770                 $expires = "+1d";
8771         }
8772         my $refs = git_get_references();
8773         my $ref = format_ref_marker($refs, $co{'id'});
8774
8775         git_header_html(undef, $expires);
8776         git_print_page_nav('commit', '',
8777                            $hash, $co{'tree'}, $hash,
8778                            $formats_nav);
8779
8780         if (defined $co{'parent'}) {
8781                 git_print_header_div('commitdiff', esc_html($co{'title'}), $hash, undef, $ref);
8782         } else {
8783                 git_print_header_div('tree', esc_html($co{'title'}), $co{'tree'}, $hash, $ref);
8784         }
8785         print "<div class=\"title_text\">\n" .
8786               "<table class=\"object_header\">\n";
8787         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
8788         git_print_authorship_rows(\%co);
8789         print "<tr>" .
8790               "<td>tree</td>" .
8791               "<td class=\"sha1\">" .
8792               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
8793                        class => "list"}, $co{'tree'}) .
8794               "</td>" .
8795               "<td class=\"link\">" .
8796               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
8797                       "tree");
8798         my $snapshot_links = format_snapshot_links($hash);
8799         if (defined $snapshot_links) {
8800                 print " | " . $snapshot_links;
8801         }
8802         print "</td>" .
8803               "</tr>\n";
8804
8805         foreach my $par (@$parents) {
8806                 print "<tr>" .
8807                       "<td>parent</td>" .
8808                       "<td class=\"sha1\">" .
8809                       $cgi->a({-href => href(action=>"commit", hash=>$par),
8810                                class => "list"}, $par) .
8811                       "</td>" .
8812                       "<td class=\"link\">" .
8813                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
8814                       " | " .
8815                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
8816                       "</td>" .
8817                       "</tr>\n";
8818         }
8819         print "</table>".
8820               "</div>\n";
8821
8822         print "<div class=\"page_body\">\n";
8823         git_print_log($co{'comment'});
8824         print "</div>\n";
8825
8826         git_difftree_body(\@difftree, $hash, @$parents);
8827
8828         git_footer_html();
8829 }
8830
8831 sub git_object {
8832         # object is defined by:
8833         # - hash or hash_base alone
8834         # - hash_base and file_name
8835         my $type;
8836
8837         # - hash or hash_base alone
8838         if ($hash || ($hash_base && !defined $file_name)) {
8839                 my $object_id = $hash || $hash_base;
8840
8841                 defined(my $fd = git_cmd_pipe 'cat-file', '-t', $object_id)
8842                         or die_error(404, "Object does not exist");
8843                 $type = <$fd>;
8844                 chomp $type;
8845                 close $fd
8846                         or die_error(404, "Object does not exist");
8847
8848         # - hash_base and file_name
8849         } elsif ($hash_base && defined $file_name) {
8850                 $file_name =~ s,/+$,,;
8851
8852                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
8853                         or die_error(404, "Base object does not exist");
8854
8855                 # here errors should not happen
8856                 defined(my $fd = git_cmd_pipe "ls-tree", $hash_base, "--", $file_name)
8857                         or die_error(500, "Open git-ls-tree failed");
8858                 my $line = to_utf8(scalar <$fd>);
8859                 close $fd;
8860
8861                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
8862                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
8863                         die_error(404, "File or directory for given base does not exist");
8864                 }
8865                 $type = $2;
8866                 $hash = $3;
8867         } else {
8868                 die_error(400, "Not enough information to find object");
8869         }
8870
8871         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
8872                                           hash=>$hash, hash_base=>$hash_base,
8873                                           file_name=>$file_name),
8874                              -status => '302 Found');
8875 }
8876
8877 sub git_blobdiff {
8878         my $format = shift || 'html';
8879         my $diff_style = $input_params{'diff_style'} || 'inline';
8880
8881         my $fd;
8882         my @difftree;
8883         my %diffinfo;
8884         my $expires;
8885
8886         # preparing $fd and %diffinfo for git_patchset_body
8887         # new style URI
8888         if (defined $hash_base && defined $hash_parent_base) {
8889                 if (defined $file_name) {
8890                         # read raw output
8891                         defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
8892                                 $hash_parent_base, $hash_base,
8893                                 "--", (defined $file_parent ? $file_parent : ()), $file_name)
8894                                 or die_error(500, "Open git-diff-tree failed");
8895                         @difftree = map { chomp; to_utf8($_) } <$fd>;
8896                         close $fd
8897                                 or die_error(404, "Reading git-diff-tree failed");
8898                         @difftree
8899                                 or die_error(404, "Blob diff not found");
8900
8901                 } elsif (defined $hash &&
8902                          $hash =~ /[0-9a-fA-F]{40}/) {
8903                         # try to find filename from $hash
8904
8905                         # read filtered raw output
8906                         defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
8907                                 $hash_parent_base, $hash_base, "--")
8908                                 or die_error(500, "Open git-diff-tree failed");
8909                         @difftree =
8910                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
8911                                 # $hash == to_id
8912                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
8913                                 map { chomp; to_utf8($_) } <$fd>;
8914                         close $fd
8915                                 or die_error(404, "Reading git-diff-tree failed");
8916                         @difftree
8917                                 or die_error(404, "Blob diff not found");
8918
8919                 } else {
8920                         die_error(400, "Missing one of the blob diff parameters");
8921                 }
8922
8923                 if (@difftree > 1) {
8924                         die_error(400, "Ambiguous blob diff specification");
8925                 }
8926
8927                 %diffinfo = parse_difftree_raw_line($difftree[0]);
8928                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
8929                 $file_name   ||= $diffinfo{'to_file'};
8930
8931                 $hash_parent ||= $diffinfo{'from_id'};
8932                 $hash        ||= $diffinfo{'to_id'};
8933
8934                 # non-textual hash id's can be cached
8935                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
8936                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
8937                         $expires = '+1d';
8938                 }
8939
8940                 # open patch output
8941                 defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
8942                         '-p', ($format eq 'html' ? "--full-index" : ()),
8943                         $hash_parent_base, $hash_base,
8944                         "--", (defined $file_parent ? $file_parent : ()), $file_name)
8945                         or die_error(500, "Open git-diff-tree failed");
8946         }
8947
8948         # old/legacy style URI -- not generated anymore since 1.4.3.
8949         if (!%diffinfo) {
8950                 die_error('404 Not Found', "Missing one of the blob diff parameters")
8951         }
8952
8953         # header
8954         if ($format eq 'html') {
8955                 my $formats_nav =
8956                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
8957                                 "raw");
8958                 $formats_nav .= diff_style_nav($diff_style);
8959                 git_header_html(undef, $expires);
8960                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
8961                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
8962                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
8963                 } else {
8964                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
8965                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
8966                 }
8967                 if (defined $file_name) {
8968                         git_print_page_path($file_name, "blob", $hash_base);
8969                 } else {
8970                         print "<div class=\"page_path\"></div>\n";
8971                 }
8972
8973         } elsif ($format eq 'plain') {
8974                 print $cgi->header(
8975                         -type => 'text/plain',
8976                         -charset => 'utf-8',
8977                         -expires => $expires,
8978                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
8979
8980                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8981
8982         } else {
8983                 die_error(400, "Unknown blobdiff format");
8984         }
8985
8986         # patch
8987         if ($format eq 'html') {
8988                 print "<div class=\"page_body\">\n";
8989
8990                 git_patchset_body($fd, $diff_style,
8991                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
8992                 close $fd;
8993
8994                 print "</div>\n"; # class="page_body"
8995                 git_footer_html();
8996
8997         } else {
8998                 while (my $line = to_utf8(scalar <$fd>)) {
8999                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
9000                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
9001
9002                         print $line;
9003
9004                         last if $line =~ m!^\+\+\+!;
9005                 }
9006                 while (<$fd>) {
9007                         print to_utf8($_);
9008                 }
9009                 close $fd;
9010         }
9011 }
9012
9013 sub git_blobdiff_plain {
9014         git_blobdiff('plain');
9015 }
9016
9017 # assumes that it is added as later part of already existing navigation,
9018 # so it returns "| foo | bar" rather than just "foo | bar"
9019 sub diff_style_nav {
9020         my ($diff_style, $is_combined) = @_;
9021         $diff_style ||= 'inline';
9022
9023         return "" if ($is_combined);
9024
9025         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
9026         my %styles = @styles;
9027         @styles =
9028                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
9029
9030         return join '',
9031                 map { " | ".$_ }
9032                 map {
9033                         $_ eq $diff_style ? $styles{$_} :
9034                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
9035                 } @styles;
9036 }
9037
9038 sub git_commitdiff {
9039         my %params = @_;
9040         my $format = $params{-format} || 'html';
9041         my $diff_style = $input_params{'diff_style'} || 'inline';
9042
9043         my ($patch_max) = gitweb_get_feature('patches');
9044         if ($format eq 'patch') {
9045                 die_error(403, "Patch view not allowed") unless $patch_max;
9046         }
9047
9048         $hash ||= $hash_base || "HEAD";
9049         my %co = parse_commit($hash)
9050             or die_error(404, "Unknown commit object");
9051
9052         # choose format for commitdiff for merge
9053         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
9054                 $hash_parent = '--cc';
9055         }
9056         # we need to prepare $formats_nav before almost any parameter munging
9057         my $formats_nav;
9058         if ($format eq 'html') {
9059                 $formats_nav =
9060                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
9061                                 "raw");
9062                 if ($patch_max && @{$co{'parents'}} <= 1) {
9063                         $formats_nav .= " | " .
9064                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
9065                                         "patch");
9066                 }
9067                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
9068
9069                 if (defined $hash_parent &&
9070                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
9071                         # commitdiff with two commits given
9072                         my $hash_parent_short = $hash_parent;
9073                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
9074                                 $hash_parent_short = substr($hash_parent, 0, 7);
9075                         }
9076                         $formats_nav .=
9077                                 ' (from';
9078                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
9079                                 if ($co{'parents'}[$i] eq $hash_parent) {
9080                                         $formats_nav .= ' parent ' . ($i+1);
9081                                         last;
9082                                 }
9083                         }
9084                         $formats_nav .= ': ' .
9085                                 $cgi->a({-href => href(-replay=>1,
9086                                                        hash=>$hash_parent, hash_base=>undef)},
9087                                         esc_html($hash_parent_short)) .
9088                                 ')';
9089                 } elsif (!$co{'parent'}) {
9090                         # --root commitdiff
9091                         $formats_nav .= ' (initial)';
9092                 } elsif (scalar @{$co{'parents'}} == 1) {
9093                         # single parent commit
9094                         $formats_nav .=
9095                                 ' (parent: ' .
9096                                 $cgi->a({-href => href(-replay=>1,
9097                                                        hash=>$co{'parent'}, hash_base=>undef)},
9098                                         esc_html(substr($co{'parent'}, 0, 7))) .
9099                                 ')';
9100                 } else {
9101                         # merge commit
9102                         if ($hash_parent eq '--cc') {
9103                                 $formats_nav .= ' | ' .
9104                                         $cgi->a({-href => href(-replay=>1,
9105                                                                hash=>$hash, hash_parent=>'-c')},
9106                                                 'combined');
9107                         } else { # $hash_parent eq '-c'
9108                                 $formats_nav .= ' | ' .
9109                                         $cgi->a({-href => href(-replay=>1,
9110                                                                hash=>$hash, hash_parent=>'--cc')},
9111                                                 'compact');
9112                         }
9113                         $formats_nav .=
9114                                 ' (merge: ' .
9115                                 join(' ', map {
9116                                         $cgi->a({-href => href(-replay=>1,
9117                                                                hash=>$_, hash_base=>undef)},
9118                                                 esc_html(substr($_, 0, 7)));
9119                                 } @{$co{'parents'}} ) .
9120                                 ')';
9121                 }
9122         }
9123
9124         my $hash_parent_param = $hash_parent;
9125         if (!defined $hash_parent_param) {
9126                 # --cc for multiple parents, --root for parentless
9127                 $hash_parent_param =
9128                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
9129         }
9130
9131         # read commitdiff
9132         my $fd;
9133         my @difftree;
9134         if ($format eq 'html') {
9135                 defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9136                         "--no-commit-id", "--patch-with-raw", "--full-index",
9137                         $hash_parent_param, $hash, "--")
9138                         or die_error(500, "Open git-diff-tree failed");
9139
9140                 while (my $line = to_utf8(scalar <$fd>)) {
9141                         chomp $line;
9142                         # empty line ends raw part of diff-tree output
9143                         last unless $line;
9144                         push @difftree, scalar parse_difftree_raw_line($line);
9145                 }
9146
9147         } elsif ($format eq 'plain') {
9148                 defined($fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9149                         '-p', $hash_parent_param, $hash, "--")
9150                         or die_error(500, "Open git-diff-tree failed");
9151         } elsif ($format eq 'patch') {
9152                 # For commit ranges, we limit the output to the number of
9153                 # patches specified in the 'patches' feature.
9154                 # For single commits, we limit the output to a single patch,
9155                 # diverging from the git-format-patch default.
9156                 my @commit_spec = ();
9157                 if ($hash_parent) {
9158                         if ($patch_max > 0) {
9159                                 push @commit_spec, "-$patch_max";
9160                         }
9161                         push @commit_spec, '-n', "$hash_parent..$hash";
9162                 } else {
9163                         if ($params{-single}) {
9164                                 push @commit_spec, '-1';
9165                         } else {
9166                                 if ($patch_max > 0) {
9167                                         push @commit_spec, "-$patch_max";
9168                                 }
9169                                 push @commit_spec, "-n";
9170                         }
9171                         push @commit_spec, '--root', $hash;
9172                 }
9173                 defined($fd = git_cmd_pipe "format-patch", @diff_opts,
9174                         '--encoding=utf8', '--stdout', @commit_spec)
9175                         or die_error(500, "Open git-format-patch failed");
9176         } else {
9177                 die_error(400, "Unknown commitdiff format");
9178         }
9179
9180         # non-textual hash id's can be cached
9181         my $expires;
9182         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
9183                 $expires = "+1d";
9184         }
9185
9186         # write commit message
9187         if ($format eq 'html') {
9188                 my $refs = git_get_references();
9189                 my $ref = format_ref_marker($refs, $co{'id'});
9190
9191                 git_header_html(undef, $expires);
9192                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
9193                 git_print_header_div('commit', esc_html($co{'title'}), $hash, undef, $ref);
9194                 print "<div class=\"title_text\">\n" .
9195                       "<table class=\"object_header\">\n";
9196                 git_print_authorship_rows(\%co);
9197                 print "</table>".
9198                       "</div>\n";
9199                 print "<div class=\"page_body\">\n";
9200                 if (@{$co{'comment'}} > 1) {
9201                         print "<div class=\"log\">\n";
9202                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
9203                         print "</div>\n"; # class="log"
9204                 }
9205
9206         } elsif ($format eq 'plain') {
9207                 my $refs = git_get_references("tags");
9208                 my $tagname = git_get_rev_name_tags($hash);
9209                 my $filename = basename($project) . "-$hash.patch";
9210
9211                 print $cgi->header(
9212                         -type => 'text/plain',
9213                         -charset => 'utf-8',
9214                         -expires => $expires,
9215                         -content_disposition => 'inline; filename="' . "$filename" . '"');
9216                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
9217                 print "From: " . to_utf8($co{'author'}) . "\n";
9218                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
9219                 print "Subject: " . to_utf8($co{'title'}) . "\n";
9220
9221                 print "X-Git-Tag: $tagname\n" if $tagname;
9222                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
9223
9224                 foreach my $line (@{$co{'comment'}}) {
9225                         print to_utf8($line) . "\n";
9226                 }
9227                 print "---\n\n";
9228         } elsif ($format eq 'patch') {
9229                 my $filename = basename($project) . "-$hash.patch";
9230
9231                 print $cgi->header(
9232                         -type => 'text/plain',
9233                         -charset => 'utf-8',
9234                         -expires => $expires,
9235                         -content_disposition => 'inline; filename="' . "$filename" . '"');
9236         }
9237
9238         # write patch
9239         if ($format eq 'html') {
9240                 my $use_parents = !defined $hash_parent ||
9241                         $hash_parent eq '-c' || $hash_parent eq '--cc';
9242                 git_difftree_body(\@difftree, $hash,
9243                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
9244                 print "<br/>\n";
9245
9246                 git_patchset_body($fd, $diff_style,
9247                                   \@difftree, $hash,
9248                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
9249                 close $fd;
9250                 print "</div>\n"; # class="page_body"
9251                 git_footer_html();
9252
9253         } elsif ($format eq 'plain') {
9254                 while (<$fd>) {
9255                         print to_utf8($_);
9256                 }
9257                 close $fd
9258                         or print "Reading git-diff-tree failed\n";
9259         } elsif ($format eq 'patch') {
9260                 while (<$fd>) {
9261                         print to_utf8($_);
9262                 }
9263                 close $fd
9264                         or print "Reading git-format-patch failed\n";
9265         }
9266 }
9267
9268 sub git_commitdiff_plain {
9269         git_commitdiff(-format => 'plain');
9270 }
9271
9272 # format-patch-style patches
9273 sub git_patch {
9274         git_commitdiff(-format => 'patch', -single => 1);
9275 }
9276
9277 sub git_patches {
9278         git_commitdiff(-format => 'patch');
9279 }
9280
9281 sub git_history {
9282         git_log_generic('history', \&git_history_body,
9283                         $hash_base, $hash_parent_base,
9284                         $file_name, $hash);
9285 }
9286
9287 sub git_search {
9288         $searchtype ||= 'commit';
9289
9290         # check if appropriate features are enabled
9291         gitweb_check_feature('search')
9292                 or die_error(403, "Search is disabled");
9293         if ($searchtype eq 'pickaxe') {
9294                 # pickaxe may take all resources of your box and run for several minutes
9295                 # with every query - so decide by yourself how public you make this feature
9296                 gitweb_check_feature('pickaxe')
9297                         or die_error(403, "Pickaxe search is disabled");
9298         }
9299         if ($searchtype eq 'grep') {
9300                 # grep search might be potentially CPU-intensive, too
9301                 gitweb_check_feature('grep')
9302                         or die_error(403, "Grep search is disabled");
9303         }
9304
9305         if (!defined $searchtext) {
9306                 die_error(400, "Text field is empty");
9307         }
9308         if (!defined $hash) {
9309                 $hash = git_get_head_hash($project);
9310         }
9311         my %co = parse_commit($hash);
9312         if (!%co) {
9313                 die_error(404, "Unknown commit object");
9314         }
9315         if (!defined $page) {
9316                 $page = 0;
9317         }
9318
9319         if ($searchtype eq 'commit' ||
9320             $searchtype eq 'author' ||
9321             $searchtype eq 'committer') {
9322                 git_search_message(%co);
9323         } elsif ($searchtype eq 'pickaxe') {
9324                 git_search_changes(%co);
9325         } elsif ($searchtype eq 'grep') {
9326                 git_search_files(%co);
9327         } else {
9328                 die_error(400, "Unknown search type");
9329         }
9330 }
9331
9332 sub git_search_help {
9333         git_header_html();
9334         git_print_page_nav('','', $hash,$hash,$hash);
9335         print <<EOT;
9336 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
9337 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
9338 the pattern entered is recognized as the POSIX extended
9339 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
9340 insensitive).</p>
9341 <dl>
9342 <dt><b>commit</b></dt>
9343 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
9344 EOT
9345         my $have_grep = gitweb_check_feature('grep');
9346         if ($have_grep) {
9347                 print <<EOT;
9348 <dt><b>grep</b></dt>
9349 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
9350     a different one) are searched for the given pattern. On large trees, this search can take
9351 a while and put some strain on the server, so please use it with some consideration. Note that
9352 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
9353 case-sensitive.</dd>
9354 EOT
9355         }
9356         print <<EOT;
9357 <dt><b>author</b></dt>
9358 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
9359 <dt><b>committer</b></dt>
9360 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
9361 EOT
9362         my $have_pickaxe = gitweb_check_feature('pickaxe');
9363         if ($have_pickaxe) {
9364                 print <<EOT;
9365 <dt><b>pickaxe</b></dt>
9366 <dd>All commits that caused the string to appear or disappear from any file (changes that
9367 added, removed or "modified" the string) will be listed. This search can take a while and
9368 takes a lot of strain on the server, so please use it wisely. Note that since you may be
9369 interested even in changes just changing the case as well, this search is case sensitive.</dd>
9370 EOT
9371         }
9372         print "</dl>\n";
9373         git_footer_html();
9374 }
9375
9376 sub git_shortlog {
9377         git_log_generic('shortlog', \&git_shortlog_body,
9378                         $hash, $hash_parent);
9379 }
9380
9381 ## ......................................................................
9382 ## feeds (RSS, Atom; OPML)
9383
9384 sub git_feed {
9385         my $format = shift || 'atom';
9386         my $have_blame = gitweb_check_feature('blame');
9387
9388         # Atom: http://www.atomenabled.org/developers/syndication/
9389         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
9390         if ($format ne 'rss' && $format ne 'atom') {
9391                 die_error(400, "Unknown web feed format");
9392         }
9393
9394         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
9395         my $head = $hash || 'HEAD';
9396         my @commitlist = parse_commits($head, 150, 0, $file_name);
9397
9398         my %latest_commit;
9399         my %latest_date;
9400         my $content_type = "application/$format+xml";
9401         if (defined $cgi->http('HTTP_ACCEPT') &&
9402                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
9403                 # browser (feed reader) prefers text/xml
9404                 $content_type = 'text/xml';
9405         }
9406         if (defined($commitlist[0])) {
9407                 %latest_commit = %{$commitlist[0]};
9408                 my $latest_epoch = $latest_commit{'committer_epoch'};
9409                 exit_if_unmodified_since($latest_epoch);
9410                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
9411         }
9412         print $cgi->header(
9413                 -type => $content_type,
9414                 -charset => 'utf-8',
9415                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
9416                 -status => '200 OK');
9417
9418         # Optimization: skip generating the body if client asks only
9419         # for Last-Modified date.
9420         return if ($cgi->request_method() eq 'HEAD');
9421
9422         # header variables
9423         my $title = "$site_name - $project/$action";
9424         my $feed_type = 'log';
9425         if (defined $hash) {
9426                 $title .= " - '$hash'";
9427                 $feed_type = 'branch log';
9428                 if (defined $file_name) {
9429                         $title .= " :: $file_name";
9430                         $feed_type = 'history';
9431                 }
9432         } elsif (defined $file_name) {
9433                 $title .= " - $file_name";
9434                 $feed_type = 'history';
9435         }
9436         $title .= " $feed_type";
9437         $title = esc_html($title);
9438         my $descr = git_get_project_description($project);
9439         if (defined $descr) {
9440                 $descr = esc_html($descr);
9441         } else {
9442                 $descr = "$project " .
9443                          ($format eq 'rss' ? 'RSS' : 'Atom') .
9444                          " feed";
9445         }
9446         my $owner = git_get_project_owner($project);
9447         $owner = esc_html($owner);
9448
9449         #header
9450         my $alt_url;
9451         if (defined $file_name) {
9452                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
9453         } elsif (defined $hash) {
9454                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
9455         } else {
9456                 $alt_url = href(-full=>1, action=>"summary");
9457         }
9458         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
9459         if ($format eq 'rss') {
9460                 print <<XML;
9461 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
9462 <channel>
9463 XML
9464                 print "<title>$title</title>\n" .
9465                       "<link>$alt_url</link>\n" .
9466                       "<description>$descr</description>\n" .
9467                       "<language>en</language>\n" .
9468                       # project owner is responsible for 'editorial' content
9469                       "<managingEditor>$owner</managingEditor>\n";
9470                 if (defined $logo || defined $favicon) {
9471                         # prefer the logo to the favicon, since RSS
9472                         # doesn't allow both
9473                         my $img = esc_url($logo || $favicon);
9474                         print "<image>\n" .
9475                               "<url>$img</url>\n" .
9476                               "<title>$title</title>\n" .
9477                               "<link>$alt_url</link>\n" .
9478                               "</image>\n";
9479                 }
9480                 if (%latest_date) {
9481                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
9482                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
9483                 }
9484                 print "<generator>gitweb v.$version/$git_version</generator>\n";
9485         } elsif ($format eq 'atom') {
9486                 print <<XML;
9487 <feed xmlns="http://www.w3.org/2005/Atom">
9488 XML
9489                 print "<title>$title</title>\n" .
9490                       "<subtitle>$descr</subtitle>\n" .
9491                       '<link rel="alternate" type="text/html" href="' .
9492                       $alt_url . '" />' . "\n" .
9493                       '<link rel="self" type="' . $content_type . '" href="' .
9494                       $cgi->self_url() . '" />' . "\n" .
9495                       "<id>" . href(-full=>1) . "</id>\n" .
9496                       # use project owner for feed author
9497                       '<author><name>'. email_obfuscate($owner) . '</name></author>\n';
9498                 if (defined $favicon) {
9499                         print "<icon>" . esc_url($favicon) . "</icon>\n";
9500                 }
9501                 if (defined $logo) {
9502                         # not twice as wide as tall: 72 x 27 pixels
9503                         print "<logo>" . esc_url($logo) . "</logo>\n";
9504                 }
9505                 if (! %latest_date) {
9506                         # dummy date to keep the feed valid until commits trickle in:
9507                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
9508                 } else {
9509                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
9510                 }
9511                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
9512         }
9513
9514         # contents
9515         for (my $i = 0; $i <= $#commitlist; $i++) {
9516                 my %co = %{$commitlist[$i]};
9517                 my $commit = $co{'id'};
9518                 # we read 150, we always show 30 and the ones more recent than 48 hours
9519                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
9520                         last;
9521                 }
9522                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
9523
9524                 # get list of changed files
9525                 defined(my $fd = git_cmd_pipe "diff-tree", '-r', @diff_opts,
9526                         $co{'parent'} || "--root",
9527                         $co{'id'}, "--", (defined $file_name ? $file_name : ()))
9528                         or next;
9529                 my @difftree = map { chomp; to_utf8($_) } <$fd>;
9530                 close $fd
9531                         or next;
9532
9533                 # print element (entry, item)
9534                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
9535                 if ($format eq 'rss') {
9536                         print "<item>\n" .
9537                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
9538                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
9539                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
9540                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
9541                               "<link>$co_url</link>\n" .
9542                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
9543                               "<content:encoded>" .
9544                               "<![CDATA[\n";
9545                 } elsif ($format eq 'atom') {
9546                         print "<entry>\n" .
9547                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
9548                               "<updated>$cd{'iso-8601'}</updated>\n" .
9549                               "<author>\n" .
9550                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
9551                         if ($co{'author_email'}) {
9552                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
9553                         }
9554                         print "</author>\n" .
9555                               # use committer for contributor
9556                               "<contributor>\n" .
9557                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
9558                         if ($co{'committer_email'}) {
9559                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
9560                         }
9561                         print "</contributor>\n" .
9562                               "<published>$cd{'iso-8601'}</published>\n" .
9563                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
9564                               "<id>$co_url</id>\n" .
9565                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
9566                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
9567                 }
9568                 my $comment = $co{'comment'};
9569                 print "<pre>\n";
9570                 foreach my $line (@$comment) {
9571                         $line = esc_html($line);
9572                         print "$line\n";
9573                 }
9574                 print "</pre><ul>\n";
9575                 foreach my $difftree_line (@difftree) {
9576                         my %difftree = parse_difftree_raw_line($difftree_line);
9577                         next if !$difftree{'from_id'};
9578
9579                         my $file = $difftree{'file'} || $difftree{'to_file'};
9580
9581                         print "<li>" .
9582                               "[" .
9583                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
9584                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
9585                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
9586                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
9587                                       -title => "diff"}, 'D');
9588                         if ($have_blame) {
9589                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
9590                                                              file_name=>$file, hash_base=>$commit),
9591                                               -class => "blamelink",
9592                                               -title => "blame"}, 'B');
9593                         }
9594                         # if this is not a feed of a file history
9595                         if (!defined $file_name || $file_name ne $file) {
9596                                 print $cgi->a({-href => href(-full=>1, action=>"history",
9597                                                              file_name=>$file, hash=>$commit),
9598                                               -title => "history"}, 'H');
9599                         }
9600                         $file = esc_path($file);
9601                         print "] ".
9602                               "$file</li>\n";
9603                 }
9604                 if ($format eq 'rss') {
9605                         print "</ul>]]>\n" .
9606                               "</content:encoded>\n" .
9607                               "</item>\n";
9608                 } elsif ($format eq 'atom') {
9609                         print "</ul>\n</div>\n" .
9610                               "</content>\n" .
9611                               "</entry>\n";
9612                 }
9613         }
9614
9615         # end of feed
9616         if ($format eq 'rss') {
9617                 print "</channel>\n</rss>\n";
9618         } elsif ($format eq 'atom') {
9619                 print "</feed>\n";
9620         }
9621 }
9622
9623 sub git_rss {
9624         git_feed('rss');
9625 }
9626
9627 sub git_atom {
9628         git_feed('atom');
9629 }
9630
9631 sub git_opml {
9632         my @list = git_get_projects_list($project_filter, $strict_export);
9633         if (!@list) {
9634                 die_error(404, "No projects found");
9635         }
9636
9637         print $cgi->header(
9638                 -type => 'text/xml',
9639                 -charset => 'utf-8',
9640                 -content_disposition => 'inline; filename="opml.xml"');
9641
9642         my $title = esc_html($site_name);
9643         my $filter = " within subdirectory ";
9644         if (defined $project_filter) {
9645                 $filter .= esc_html($project_filter);
9646         } else {
9647                 $filter = "";
9648         }
9649         print <<XML;
9650 <?xml version="1.0" encoding="utf-8"?>
9651 <opml version="1.0">
9652 <head>
9653   <title>$title OPML Export$filter</title>
9654 </head>
9655 <body>
9656 <outline text="git RSS feeds">
9657 XML
9658
9659         foreach my $pr (@list) {
9660                 my %proj = %$pr;
9661                 my $head = git_get_head_hash($proj{'path'});
9662                 if (!defined $head) {
9663                         next;
9664                 }
9665                 $git_dir = "$projectroot/$proj{'path'}";
9666                 my %co = parse_commit($head);
9667                 if (!%co) {
9668                         next;
9669                 }
9670
9671                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
9672                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
9673                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
9674                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
9675         }
9676         print <<XML;
9677 </outline>
9678 </body>
9679 </opml>
9680 XML
9681 }