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 # handle ACL in file access tests
  14 use filetest 'access';
  15 use CGI qw(:standard :escapeHTML -nosticky);
  16 use CGI::Util qw(unescape);
  17 use CGI::Carp qw(fatalsToBrowser set_message);
  18 use Encode;
  19 use Fcntl ':mode';
  20 use File::Find qw();
  21 use File::Basename qw(basename);
  22 use Time::HiRes qw(gettimeofday tv_interval);
  23 use Digest::MD5 qw(md5_hex);
  24
  25 binmode STDOUT, ':utf8';
  26
  27 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  28         eval 'sub CGI::multi_param { CGI::param(@_) }'
  29 }
  30
  31 our $t0 = [ gettimeofday() ];
  32 our $number_of_git_cmds = 0;
  33
  34 BEGIN {
  35         CGI->compile() if $ENV{'MOD_PERL'};
  36 }
  37
  38 our $version = "++GIT_VERSION++";
  39
  40 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  41 sub evaluate_uri {
  42         our $cgi;
  43
  44         our $my_url = $cgi->url();
  45         our $my_uri = $cgi->url(-absolute => 1);
  46
  47         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  48         # needed and used only for URLs with nonempty PATH_INFO
  49         our $base_url = $my_url;
  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 = $cgi->url(-base => 1) . $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 # show repository only if this file exists
 149 # (only effective if this variable evaluates to true)
 150 our $export_ok = "++GITWEB_EXPORT_OK++";
 151
 152 # don't generate age column on the projects list page
 153 our $omit_age_column = 0;
 154
 155 # don't generate information about owners of repositories
 156 our $omit_owner=0;
 157
 158 # show repository only if this subroutine returns true
 159 # when given the path to the project, for example:
 160 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 161 our $export_auth_hook = undef;
 162
 163 # only allow viewing of repositories also shown on the overview page
 164 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 165
 166 # list of git base URLs used for URL to where fetch project from,
 167 # i.e. full URL is "$git_base_url/$project"
 168 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 169
 170 # default blob_plain mimetype and default charset for text/plain blob
 171 our $default_blob_plain_mimetype = 'text/plain';
 172 our $default_text_plain_charset  = undef;
 173
 174 # file to use for guessing MIME types before trying /etc/mime.types
 175 # (relative to the current git repository)
 176 our $mimetypes_file = undef;
 177
 178 # assume this charset if line contains non-UTF-8 characters;
 179 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 180 # for which encoding all byte sequences are valid, for example
 181 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 182 # could be even 'utf-8' for the old behavior)
 183 our $fallback_encoding = 'latin1';
 184
 185 # rename detection options for git-diff and git-diff-tree
 186 # - default is '-M', with the cost proportional to
 187 #   (number of removed files) * (number of new files).
 188 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 189 #   (number of changed files + number of removed files) * (number of new files)
 190 # - even more costly is '-C', '--find-copies-harder' with cost
 191 #   (number of files in the original tree) * (number of new files)
 192 # - one might want to include '-B' option, e.g. '-B', '-M'
 193 our @diff_opts = ('-M'); # taken from git_commit
 194
 195 # Disables features that would allow repository owners to inject script into
 196 # the gitweb domain.
 197 our $prevent_xss = 0;
 198
 199 # Path to the highlight executable to use (must be the one from
 200 # http://www.andre-simon.de due to assumptions about parameters and output).
 201 # Useful if highlight is not installed on your webserver's PATH.
 202 # [Default: highlight]
 203 our $highlight_bin = "++HIGHLIGHT_BIN++";
 204
 205 # information about snapshot formats that gitweb is capable of serving
 206 our %known_snapshot_formats = (
 207         # name => {
 208         #       'display' => display name,
 209         #       'type' => mime type,
 210         #       'suffix' => filename suffix,
 211         #       'format' => --format for git-archive,
 212         #       'compressor' => [compressor command and arguments]
 213         #                       (array reference, optional)
 214         #       'disabled' => boolean (optional)}
 215         #
 216         'tgz' => {
 217                 'display' => 'tar.gz',
 218                 'type' => 'application/x-gzip',
 219                 'suffix' => '.tar.gz',
 220                 'format' => 'tar',
 221                 'compressor' => ['gzip', '-n']},
 222
 223         'tbz2' => {
 224                 'display' => 'tar.bz2',
 225                 'type' => 'application/x-bzip2',
 226                 'suffix' => '.tar.bz2',
 227                 'format' => 'tar',
 228                 'compressor' => ['bzip2']},
 229
 230         'txz' => {
 231                 'display' => 'tar.xz',
 232                 'type' => 'application/x-xz',
 233                 'suffix' => '.tar.xz',
 234                 'format' => 'tar',
 235                 'compressor' => ['xz'],
 236                 'disabled' => 1},
 237
 238         'zip' => {
 239                 'display' => 'zip',
 240                 'type' => 'application/x-zip',
 241                 'suffix' => '.zip',
 242                 'format' => 'zip'},
 243 );
 244
 245 # Aliases so we understand old gitweb.snapshot values in repository
 246 # configuration.
 247 our %known_snapshot_format_aliases = (
 248         'gzip'  => 'tgz',
 249         'bzip2' => 'tbz2',
 250         'xz'    => 'txz',
 251
 252         # backward compatibility: legacy gitweb config support
 253         'x-gzip' => undef, 'gz' => undef,
 254         'x-bzip2' => undef, 'bz2' => undef,
 255         'x-zip' => undef, '' => undef,
 256 );
 257
 258 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 259 # are changed, it may be appropriate to change these values too via
 260 # $GITWEB_CONFIG.
 261 our %avatar_size = (
 262         'default' => 16,
 263         'double'  => 32
 264 );
 265
 266 # Used to set the maximum load that we will still respond to gitweb queries.
 267 # If server load exceed this value then return "503 server busy" error.
 268 # If gitweb cannot determined server load, it is taken to be 0.
 269 # Leave it undefined (or set to 'undef') to turn off load checking.
 270 our $maxload = 300;
 271
 272 # configuration for 'highlight' (http://www.andre-simon.de/)
 273 # match by basename
 274 our %highlight_basename = (
 275         #'Program' => 'py',
 276         #'Library' => 'py',
 277         'SConstruct' => 'py', # SCons equivalent of Makefile
 278         'Makefile' => 'make',
 279 );
 280 # match by extension
 281 our %highlight_ext = (
 282         # main extensions, defining name of syntax;
 283         # see files in /usr/share/highlight/langDefs/ directory
 284         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 285         # alternate extensions, see /etc/highlight/filetypes.conf
 286         (map { $_ => 'c'   } qw(c h)),
 287         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 288         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 289         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 290         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 291         (map { $_ => 'make'} qw(make mak mk)),
 292         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 293 );
 294
 295 # You define site-wide feature defaults here; override them with
 296 # $GITWEB_CONFIG as necessary.
 297 our %feature = (
 298         # feature => {
 299         #       'sub' => feature-sub (subroutine),
 300         #       'override' => allow-override (boolean),
 301         #       'default' => [ default options...] (array reference)}
 302         #
 303         # if feature is overridable (it means that allow-override has true value),
 304         # then feature-sub will be called with default options as parameters;
 305         # return value of feature-sub indicates if to enable specified feature
 306         #
 307         # if there is no 'sub' key (no feature-sub), then feature cannot be
 308         # overridden
 309         #
 310         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 311         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 312         # is enabled
 313
 314         # Enable the 'blame' blob view, showing the last commit that modified
 315         # each line in the file. This can be very CPU-intensive.
 316
 317         # To enable system wide have in $GITWEB_CONFIG
 318         # $feature{'blame'}{'default'} = [1];
 319         # To have project specific config enable override in $GITWEB_CONFIG
 320         # $feature{'blame'}{'override'} = 1;
 321         # and in project config gitweb.blame = 0|1;
 322         'blame' => {
 323                 'sub' => sub { feature_bool('blame', @_) },
 324                 'override' => 0,
 325                 'default' => [0]},
 326
 327         # Enable the 'snapshot' link, providing a compressed archive of any
 328         # tree. This can potentially generate high traffic if you have large
 329         # project.
 330
 331         # Value is a list of formats defined in %known_snapshot_formats that
 332         # you wish to offer.
 333         # To disable system wide have in $GITWEB_CONFIG
 334         # $feature{'snapshot'}{'default'} = [];
 335         # To have project specific config enable override in $GITWEB_CONFIG
 336         # $feature{'snapshot'}{'override'} = 1;
 337         # and in project config, a comma-separated list of formats or "none"
 338         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 339         'snapshot' => {
 340                 'sub' => \&feature_snapshot,
 341                 'override' => 0,
 342                 'default' => ['tgz']},
 343
 344         # Enable text search, which will list the commits which match author,
 345         # committer or commit text to a given string.  Enabled by default.
 346         # Project specific override is not supported.
 347         #
 348         # Note that this controls all search features, which means that if
 349         # it is disabled, then 'grep' and 'pickaxe' search would also be
 350         # disabled.
 351         'search' => {
 352                 'override' => 0,
 353                 'default' => [1]},
 354
 355         # Enable grep search, which will list the files in currently selected
 356         # tree containing the given string. Enabled by default. This can be
 357         # potentially CPU-intensive, of course.
 358         # Note that you need to have 'search' feature enabled too.
 359
 360         # To enable system wide have in $GITWEB_CONFIG
 361         # $feature{'grep'}{'default'} = [1];
 362         # To have project specific config enable override in $GITWEB_CONFIG
 363         # $feature{'grep'}{'override'} = 1;
 364         # and in project config gitweb.grep = 0|1;
 365         'grep' => {
 366                 'sub' => sub { feature_bool('grep', @_) },
 367                 'override' => 0,
 368                 'default' => [1]},
 369
 370         # Enable the pickaxe search, which will list the commits that modified
 371         # a given string in a file. This can be practical and quite faster
 372         # alternative to 'blame', but still potentially CPU-intensive.
 373         # Note that you need to have 'search' feature enabled too.
 374
 375         # To enable system wide have in $GITWEB_CONFIG
 376         # $feature{'pickaxe'}{'default'} = [1];
 377         # To have project specific config enable override in $GITWEB_CONFIG
 378         # $feature{'pickaxe'}{'override'} = 1;
 379         # and in project config gitweb.pickaxe = 0|1;
 380         'pickaxe' => {
 381                 'sub' => sub { feature_bool('pickaxe', @_) },
 382                 'override' => 0,
 383                 'default' => [1]},
 384
 385         # Enable showing size of blobs in a 'tree' view, in a separate
 386         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 387
 388         # To disable system wide have in $GITWEB_CONFIG
 389         # $feature{'show-sizes'}{'default'} = [0];
 390         # To have project specific config enable override in $GITWEB_CONFIG
 391         # $feature{'show-sizes'}{'override'} = 1;
 392         # and in project config gitweb.showsizes = 0|1;
 393         'show-sizes' => {
 394                 'sub' => sub { feature_bool('showsizes', @_) },
 395                 'override' => 0,
 396                 'default' => [1]},
 397
 398         # Make gitweb use an alternative format of the URLs which can be
 399         # more readable and natural-looking: project name is embedded
 400         # directly in the path and the query string contains other
 401         # auxiliary information. All gitweb installations recognize
 402         # URL in either format; this configures in which formats gitweb
 403         # generates links.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'pathinfo'}{'default'} = [1];
 407         # Project specific override is not supported.
 408
 409         # Note that you will need to change the default location of CSS,
 410         # favicon, logo and possibly other files to an absolute URL. Also,
 411         # if gitweb.cgi serves as your indexfile, you will need to force
 412         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 413         'pathinfo' => {
 414                 'override' => 0,
 415                 'default' => [0]},
 416
 417         # Make gitweb consider projects in project root subdirectories
 418         # to be forks of existing projects. Given project $projname.git,
 419         # projects matching $projname/*.git will not be shown in the main
 420         # projects list, instead a '+' mark will be added to $projname
 421         # there and a 'forks' view will be enabled for the project, listing
 422         # all the forks. If project list is taken from a file, forks have
 423         # to be listed after the main project.
 424
 425         # To enable system wide have in $GITWEB_CONFIG
 426         # $feature{'forks'}{'default'} = [1];
 427         # Project specific override is not supported.
 428         'forks' => {
 429                 'override' => 0,
 430                 'default' => [0]},
 431
 432         # Insert custom links to the action bar of all project pages.
 433         # This enables you mainly to link to third-party scripts integrating
 434         # into gitweb; e.g. git-browser for graphical history representation
 435         # or custom web-based repository administration interface.
 436
 437         # The 'default' value consists of a list of triplets in the form
 438         # (label, link, position) where position is the label after which
 439         # to insert the link and link is a format string where %n expands
 440         # to the project name, %f to the project path within the filesystem,
 441         # %h to the current hash (h gitweb parameter) and %b to the current
 442         # hash base (hb gitweb parameter); %% expands to %.
 443
 444         # To enable system wide have in $GITWEB_CONFIG e.g.
 445         # $feature{'actions'}{'default'} = [('graphiclog',
 446         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 447         # Project specific override is not supported.
 448         'actions' => {
 449                 'override' => 0,
 450                 'default' => []},
 451
 452         # Allow gitweb scan project content tags of project repository,
 453         # and display the popular Web 2.0-ish "tag cloud" near the projects
 454         # list.  Note that this is something COMPLETELY different from the
 455         # normal Git tags.
 456
 457         # gitweb by itself can show existing tags, but it does not handle
 458         # tagging itself; you need to do it externally, outside gitweb.
 459         # The format is described in git_get_project_ctags() subroutine.
 460         # You may want to install the HTML::TagCloud Perl module to get
 461         # a pretty tag cloud instead of just a list of tags.
 462
 463         # To enable system wide have in $GITWEB_CONFIG
 464         # $feature{'ctags'}{'default'} = [1];
 465         # Project specific override is not supported.
 466
 467         # In the future whether ctags editing is enabled might depend
 468         # on the value, but using 1 should always mean no editing of ctags.
 469         'ctags' => {
 470                 'override' => 0,
 471                 'default' => [0]},
 472
 473         # The maximum number of patches in a patchset generated in patch
 474         # view. Set this to 0 or undef to disable patch view, or to a
 475         # negative number to remove any limit.
 476
 477         # To disable system wide have in $GITWEB_CONFIG
 478         # $feature{'patches'}{'default'} = [0];
 479         # To have project specific config enable override in $GITWEB_CONFIG
 480         # $feature{'patches'}{'override'} = 1;
 481         # and in project config gitweb.patches = 0|n;
 482         # where n is the maximum number of patches allowed in a patchset.
 483         'patches' => {
 484                 'sub' => \&feature_patches,
 485                 'override' => 0,
 486                 'default' => [16]},
 487
 488         # Avatar support. When this feature is enabled, views such as
 489         # shortlog or commit will display an avatar associated with
 490         # the email of the committer(s) and/or author(s).
 491
 492         # Currently available providers are gravatar and picon.
 493         # If an unknown provider is specified, the feature is disabled.
 494
 495         # Picon currently relies on the indiana.edu database.
 496
 497         # To enable system wide have in $GITWEB_CONFIG
 498         # $feature{'avatar'}{'default'} = ['<provider>'];
 499         # where <provider> is either gravatar or picon.
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'avatar'}{'override'} = 1;
 502         # and in project config gitweb.avatar = <provider>;
 503         'avatar' => {
 504                 'sub' => \&feature_avatar,
 505                 'override' => 0,
 506                 'default' => ['']},
 507
 508         # Enable displaying how much time and how many git commands
 509         # it took to generate and display page.  Disabled by default.
 510         # Project specific override is not supported.
 511         'timed' => {
 512                 'override' => 0,
 513                 'default' => [0]},
 514
 515         # Enable turning some links into links to actions which require
 516         # JavaScript to run (like 'blame_incremental').  Not enabled by
 517         # default.  Project specific override is currently not supported.
 518         'javascript-actions' => {
 519                 'override' => 0,
 520                 'default' => [0]},
 521
 522         # Enable and configure ability to change common timezone for dates
 523         # in gitweb output via JavaScript.  Enabled by default.
 524         # Project specific override is not supported.
 525         'javascript-timezone' => {
 526                 'override' => 0,
 527                 'default' => [
 528                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 529                                      # or undef to turn off this feature
 530                         'gitweb_tz', # name of cookie where to store selected timezone
 531                         'datetime',  # CSS class used to mark up dates for manipulation
 532                 ]},
 533
 534         # Syntax highlighting support. This is based on Daniel Svensson's
 535         # and Sham Chukoury's work in gitweb-xmms2.git.
 536         # It requires the 'highlight' program present in $PATH,
 537         # and therefore is disabled by default.
 538
 539         # To enable system wide have in $GITWEB_CONFIG
 540         # $feature{'highlight'}{'default'} = [1];
 541
 542         'highlight' => {
 543                 'sub' => sub { feature_bool('highlight', @_) },
 544                 'override' => 0,
 545                 'default' => [0]},
 546
 547         # Enable displaying of remote heads in the heads list
 548
 549         # To enable system wide have in $GITWEB_CONFIG
 550         # $feature{'remote_heads'}{'default'} = [1];
 551         # To have project specific config enable override in $GITWEB_CONFIG
 552         # $feature{'remote_heads'}{'override'} = 1;
 553         # and in project config gitweb.remoteheads = 0|1;
 554         'remote_heads' => {
 555                 'sub' => sub { feature_bool('remote_heads', @_) },
 556                 'override' => 0,
 557                 'default' => [0]},
 558
 559         # Enable showing branches under other refs in addition to heads
 560
 561         # To set system wide extra branch refs have in $GITWEB_CONFIG
 562         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 563         # To have project specific config enable override in $GITWEB_CONFIG
 564         # $feature{'extra-branch-refs'}{'override'} = 1;
 565         # and in project config gitweb.extrabranchrefs = dirs of choice
 566         # Every directory is separated with whitespace.
 567
 568         'extra-branch-refs' => {
 569                 'sub' => \&feature_extra_branch_refs,
 570                 'override' => 0,
 571                 'default' => []},
 572
 573         # Redact e-mail addresses.
 574
 575         # To enable system wide have in $GITWEB_CONFIG
 576         # $feature{'email-privacy'}{'default'} = [1];
 577         'email-privacy' => {
 578                 'sub' => sub { feature_bool('email-privacy', @_) },
 579                 'override' => 1,
 580                 'default' => [0]},
 581 );
 582
 583 sub gitweb_get_feature {
 584         my ($name) = @_;
 585         return unless exists $feature{$name};
 586         my ($sub, $override, @defaults) = (
 587                 $feature{$name}{'sub'},
 588                 $feature{$name}{'override'},
 589                 @{$feature{$name}{'default'}});
 590         # project specific override is possible only if we have project
 591         our $git_dir; # global variable, declared later
 592         if (!$override || !defined $git_dir) {
 593                 return @defaults;
 594         }
 595         if (!defined $sub) {
 596                 warn "feature $name is not overridable";
 597                 return @defaults;
 598         }
 599         return $sub->(@defaults);
 600 }
 601
 602 # A wrapper to check if a given feature is enabled.
 603 # With this, you can say
 604 #
 605 #   my $bool_feat = gitweb_check_feature('bool_feat');
 606 #   gitweb_check_feature('bool_feat') or somecode;
 607 #
 608 # instead of
 609 #
 610 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 611 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 612 #
 613 sub gitweb_check_feature {
 614         return (gitweb_get_feature(@_))[0];
 615 }
 616
 617
 618 sub feature_bool {
 619         my $key = shift;
 620         my ($val) = git_get_project_config($key, '--bool');
 621
 622         if (!defined $val) {
 623                 return ($_[0]);
 624         } elsif ($val eq 'true') {
 625                 return (1);
 626         } elsif ($val eq 'false') {
 627                 return (0);
 628         }
 629 }
 630
 631 sub feature_snapshot {
 632         my (@fmts) = @_;
 633
 634         my ($val) = git_get_project_config('snapshot');
 635
 636         if ($val) {
 637                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 638         }
 639
 640         return @fmts;
 641 }
 642
 643 sub feature_patches {
 644         my @val = (git_get_project_config('patches', '--int'));
 645
 646         if (@val) {
 647                 return @val;
 648         }
 649
 650         return ($_[0]);
 651 }
 652
 653 sub feature_avatar {
 654         my @val = (git_get_project_config('avatar'));
 655
 656         return @val ? @val : @_;
 657 }
 658
 659 sub feature_extra_branch_refs {
 660         my (@branch_refs) = @_;
 661         my $values = git_get_project_config('extrabranchrefs');
 662
 663         if ($values) {
 664                 $values = config_to_multi ($values);
 665                 @branch_refs = ();
 666                 foreach my $value (@{$values}) {
 667                         push @branch_refs, split /\s+/, $value;
 668                 }
 669         }
 670
 671         return @branch_refs;
 672 }
 673
 674 # checking HEAD file with -e is fragile if the repository was
 675 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 676 # and then pruned.
 677 sub check_head_link {
 678         my ($dir) = @_;
 679         my $headfile = "$dir/HEAD";
 680         return ((-e $headfile) ||
 681                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 682 }
 683
 684 sub check_export_ok {
 685         my ($dir) = @_;
 686         return (check_head_link($dir) &&
 687                 (!$export_ok || -e "$dir/$export_ok") &&
 688                 (!$export_auth_hook || $export_auth_hook->($dir)));
 689 }
 690
 691 # process alternate names for backward compatibility
 692 # filter out unsupported (unknown) snapshot formats
 693 sub filter_snapshot_fmts {
 694         my @fmts = @_;
 695
 696         @fmts = map {
 697                 exists $known_snapshot_format_aliases{$_} ?
 698                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 699         @fmts = grep {
 700                 exists $known_snapshot_formats{$_} &&
 701                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 702 }
 703
 704 sub filter_and_validate_refs {
 705         my @refs = @_;
 706         my %unique_refs = ();
 707
 708         foreach my $ref (@refs) {
 709                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 710                 # 'heads' are added implicitly in get_branch_refs().
 711                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 712         }
 713         return sort keys %unique_refs;
 714 }
 715
 716 # If it is set to code reference, it is code that it is to be run once per
 717 # request, allowing updating configurations that change with each request,
 718 # while running other code in config file only once.
 719 #
 720 # Otherwise, if it is false then gitweb would process config file only once;
 721 # if it is true then gitweb config would be run for each request.
 722 our $per_request_config = 1;
 723
 724 # read and parse gitweb config file given by its parameter.
 725 # returns true on success, false on recoverable error, allowing
 726 # to chain this subroutine, using first file that exists.
 727 # dies on errors during parsing config file, as it is unrecoverable.
 728 sub read_config_file {
 729         my $filename = shift;
 730         return unless defined $filename;
 731         # die if there are errors parsing config file
 732         if (-e $filename) {
 733                 do $filename;
 734                 die $@ if $@;
 735                 return 1;
 736         }
 737         return;
 738 }
 739
 740 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 741 sub evaluate_gitweb_config {
 742         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 743         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 744         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 745
 746         # Protect against duplications of file names, to not read config twice.
 747         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 748         # there possibility of duplication of filename there doesn't matter.
 749         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 750         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 751
 752         # Common system-wide settings for convenience.
 753         # Those settings can be overridden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 754         read_config_file($GITWEB_CONFIG_COMMON);
 755
 756         # Use first config file that exists.  This means use the per-instance
 757         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 758         read_config_file($GITWEB_CONFIG) and return;
 759         read_config_file($GITWEB_CONFIG_SYSTEM);
 760 }
 761
 762 # Get loadavg of system, to compare against $maxload.
 763 # Currently it requires '/proc/loadavg' present to get loadavg;
 764 # if it is not present it returns 0, which means no load checking.
 765 sub get_loadavg {
 766         if( -e '/proc/loadavg' ){
 767                 open my $fd, '<', '/proc/loadavg'
 768                         or return 0;
 769                 my @load = split(/\s+/, scalar <$fd>);
 770                 close $fd;
 771
 772                 # The first three columns measure CPU and IO utilization of the last one,
 773                 # five, and 10 minute periods.  The fourth column shows the number of
 774                 # currently running processes and the total number of processes in the m/n
 775                 # format.  The last column displays the last process ID used.
 776                 return $load[0] || 0;
 777         }
 778         # additional checks for load average should go here for things that don't export
 779         # /proc/loadavg
 780
 781         return 0;
 782 }
 783
 784 # version of the core git binary
 785 our $git_version;
 786 sub evaluate_git_version {
 787         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 788         $number_of_git_cmds++;
 789 }
 790
 791 sub check_loadavg {
 792         if (defined $maxload && get_loadavg() > $maxload) {
 793                 die_error(503, "The load average on the server is too high");
 794         }
 795 }
 796
 797 # ======================================================================
 798 # input validation and dispatch
 799
 800 # Various hash size-related values.
 801 my $sha1_len = 40;
 802 my $sha256_extra_len = 24;
 803 my $sha256_len = $sha1_len + $sha256_extra_len;
 804
 805 # A regex matching $len hex characters. $len may be a range (e.g. 7,64).
 806 sub oid_nlen_regex {
 807         my $len = shift;
 808         my $hchr = qr/[0-9a-fA-F]/;
 809         return qr/(?:(?:$hchr){$len})/;
 810 }
 811
 812 # A regex matching two sets of $nlen hex characters, prefixed by the literal
 813 # string $prefix and with the literal string $infix between them.
 814 sub oid_nlen_prefix_infix_regex {
 815         my $nlen = shift;
 816         my $prefix = shift;
 817         my $infix = shift;
 818
 819         my $rx = oid_nlen_regex($nlen);
 820
 821         return qr/^\Q$prefix\E$rx\Q$infix\E$rx$/;
 822 }
 823
 824 # A regex matching a valid object ID.
 825 our $oid_regex;
 826 {
 827         my $x = oid_nlen_regex($sha1_len);
 828         my $y = oid_nlen_regex($sha256_extra_len);
 829         $oid_regex = qr/(?:$x(?:$y)?)/;
 830 }
 831
 832 # input parameters can be collected from a variety of sources (presently, CGI
 833 # and PATH_INFO), so we define an %input_params hash that collects them all
 834 # together during validation: this allows subsequent uses (e.g. href()) to be
 835 # agnostic of the parameter origin
 836
 837 our %input_params = ();
 838
 839 # input parameters are stored with the long parameter name as key. This will
 840 # also be used in the href subroutine to convert parameters to their CGI
 841 # equivalent, and since the href() usage is the most frequent one, we store
 842 # the name -> CGI key mapping here, instead of the reverse.
 843 #
 844 # XXX: Warning: If you touch this, check the search form for updating,
 845 # too.
 846
 847 our @cgi_param_mapping = (
 848         project => "p",
 849         action => "a",
 850         file_name => "f",
 851         file_parent => "fp",
 852         hash => "h",
 853         hash_parent => "hp",
 854         hash_base => "hb",
 855         hash_parent_base => "hpb",
 856         page => "pg",
 857         order => "o",
 858         searchtext => "s",
 859         searchtype => "st",
 860         snapshot_format => "sf",
 861         extra_options => "opt",
 862         search_use_regexp => "sr",
 863         ctag => "by_tag",
 864         diff_style => "ds",
 865         project_filter => "pf",
 866         # this must be last entry (for manipulation from JavaScript)
 867         javascript => "js"
 868 );
 869 our %cgi_param_mapping = @cgi_param_mapping;
 870
 871 # we will also need to know the possible actions, for validation
 872 our %actions = (
 873         "blame" => \&git_blame,
 874         "blame_incremental" => \&git_blame_incremental,
 875         "blame_data" => \&git_blame_data,
 876         "blobdiff" => \&git_blobdiff,
 877         "blobdiff_plain" => \&git_blobdiff_plain,
 878         "blob" => \&git_blob,
 879         "blob_plain" => \&git_blob_plain,
 880         "commitdiff" => \&git_commitdiff,
 881         "commitdiff_plain" => \&git_commitdiff_plain,
 882         "commit" => \&git_commit,
 883         "forks" => \&git_forks,
 884         "heads" => \&git_heads,
 885         "history" => \&git_history,
 886         "log" => \&git_log,
 887         "patch" => \&git_patch,
 888         "patches" => \&git_patches,
 889         "remotes" => \&git_remotes,
 890         "rss" => \&git_rss,
 891         "atom" => \&git_atom,
 892         "search" => \&git_search,
 893         "search_help" => \&git_search_help,
 894         "shortlog" => \&git_shortlog,
 895         "summary" => \&git_summary,
 896         "tag" => \&git_tag,
 897         "tags" => \&git_tags,
 898         "tree" => \&git_tree,
 899         "snapshot" => \&git_snapshot,
 900         "object" => \&git_object,
 901         # those below don't need $project
 902         "opml" => \&git_opml,
 903         "project_list" => \&git_project_list,
 904         "project_index" => \&git_project_index,
 905 );
 906
 907 # finally, we have the hash of allowed extra_options for the commands that
 908 # allow them
 909 our %allowed_options = (
 910         "--no-merges" => [ qw(rss atom log shortlog history) ],
 911 );
 912
 913 # fill %input_params with the CGI parameters. All values except for 'opt'
 914 # should be single values, but opt can be an array. We should probably
 915 # build an array of parameters that can be multi-valued, but since for the time
 916 # being it's only this one, we just single it out
 917 sub evaluate_query_params {
 918         our $cgi;
 919
 920         while (my ($name, $symbol) = each %cgi_param_mapping) {
 921                 if ($symbol eq 'opt') {
 922                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 923                 } else {
 924                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 925                 }
 926         }
 927 }
 928
 929 # now read PATH_INFO and update the parameter list for missing parameters
 930 sub evaluate_path_info {
 931         return if defined $input_params{'project'};
 932         return if !$path_info;
 933         $path_info =~ s,^/+,,;
 934         return if !$path_info;
 935
 936         # find which part of PATH_INFO is project
 937         my $project = $path_info;
 938         $project =~ s,/+$,,;
 939         while ($project && !check_head_link("$projectroot/$project")) {
 940                 $project =~ s,/*[^/]*$,,;
 941         }
 942         return unless $project;
 943         $input_params{'project'} = $project;
 944
 945         # do not change any parameters if an action is given using the query string
 946         return if $input_params{'action'};
 947         $path_info =~ s,^\Q$project\E/*,,;
 948
 949         # next, check if we have an action
 950         my $action = $path_info;
 951         $action =~ s,/.*$,,;
 952         if (exists $actions{$action}) {
 953                 $path_info =~ s,^$action/*,,;
 954                 $input_params{'action'} = $action;
 955         }
 956
 957         # list of actions that want hash_base instead of hash, but can have no
 958         # pathname (f) parameter
 959         my @wants_base = (
 960                 'tree',
 961                 'history',
 962         );
 963
 964         # we want to catch, among others
 965         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 966         my ($parentrefname, $parentpathname, $refname, $pathname) =
 967                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 968
 969         # first, analyze the 'current' part
 970         if (defined $pathname) {
 971                 # we got "branch:filename" or "branch:dir/"
 972                 # we could use git_get_type(branch:pathname), but:
 973                 # - it needs $git_dir
 974                 # - it does a git() call
 975                 # - the convention of terminating directories with a slash
 976                 #   makes it superfluous
 977                 # - embedding the action in the PATH_INFO would make it even
 978                 #   more superfluous
 979                 $pathname =~ s,^/+,,;
 980                 if (!$pathname || substr($pathname, -1) eq "/") {
 981                         $input_params{'action'} ||= "tree";
 982                         $pathname =~ s,/$,,;
 983                 } else {
 984                         # the default action depends on whether we had parent info
 985                         # or not
 986                         if ($parentrefname) {
 987                                 $input_params{'action'} ||= "blobdiff_plain";
 988                         } else {
 989                                 $input_params{'action'} ||= "blob_plain";
 990                         }
 991                 }
 992                 $input_params{'hash_base'} ||= $refname;
 993                 $input_params{'file_name'} ||= $pathname;
 994         } elsif (defined $refname) {
 995                 # we got "branch". In this case we have to choose if we have to
 996                 # set hash or hash_base.
 997                 #
 998                 # Most of the actions without a pathname only want hash to be
 999                 # set, except for the ones specified in @wants_base that want
1000                 # hash_base instead. It should also be noted that hand-crafted
1001                 # links having 'history' as an action and no pathname or hash
1002                 # set will fail, but that happens regardless of PATH_INFO.
1003                 if (defined $parentrefname) {
1004                         # if there is parent let the default be 'shortlog' action
1005                         # (for http://git.example.com/repo.git/A..B links); if there
1006                         # is no parent, dispatch will detect type of object and set
1007                         # action appropriately if required (if action is not set)
1008                         $input_params{'action'} ||= "shortlog";
1009                 }
1010                 if ($input_params{'action'} &&
1011                     grep { $_ eq $input_params{'action'} } @wants_base) {
1012                         $input_params{'hash_base'} ||= $refname;
1013                 } else {
1014                         $input_params{'hash'} ||= $refname;
1015                 }
1016         }
1017
1018         # next, handle the 'parent' part, if present
1019         if (defined $parentrefname) {
1020                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1021                 # someproject/blobdiff/oldrev..newrev:/filename
1022                 if ($parentpathname) {
1023                         $parentpathname =~ s,^/+,,;
1024                         $parentpathname =~ s,/$,,;
1025                         $input_params{'file_parent'} ||= $parentpathname;
1026                 } else {
1027                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1028                 }
1029                 # we assume that hash_parent_base is wanted if a path was specified,
1030                 # or if the action wants hash_base instead of hash
1031                 if (defined $input_params{'file_parent'} ||
1032                         grep { $_ eq $input_params{'action'} } @wants_base) {
1033                         $input_params{'hash_parent_base'} ||= $parentrefname;
1034                 } else {
1035                         $input_params{'hash_parent'} ||= $parentrefname;
1036                 }
1037         }
1038
1039         # for the snapshot action, we allow URLs in the form
1040         # $project/snapshot/$hash.ext
1041         # where .ext determines the snapshot and gets removed from the
1042         # passed $refname to provide the $hash.
1043         #
1044         # To be able to tell that $refname includes the format extension, we
1045         # require the following two conditions to be satisfied:
1046         # - the hash input parameter MUST have been set from the $refname part
1047         #   of the URL (i.e. they must be equal)
1048         # - the snapshot format MUST NOT have been defined already (e.g. from
1049         #   CGI parameter sf)
1050         # It's also useless to try any matching unless $refname has a dot,
1051         # so we check for that too
1052         if (defined $input_params{'action'} &&
1053                 $input_params{'action'} eq 'snapshot' &&
1054                 defined $refname && index($refname, '.') != -1 &&
1055                 $refname eq $input_params{'hash'} &&
1056                 !defined $input_params{'snapshot_format'}) {
1057                 # We loop over the known snapshot formats, checking for
1058                 # extensions. Allowed extensions are both the defined suffix
1059                 # (which includes the initial dot already) and the snapshot
1060                 # format key itself, with a prepended dot
1061                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1062                         my $hash = $refname;
1063                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1064                                 next;
1065                         }
1066                         my $sfx = $1;
1067                         # a valid suffix was found, so set the snapshot format
1068                         # and reset the hash parameter
1069                         $input_params{'snapshot_format'} = $fmt;
1070                         $input_params{'hash'} = $hash;
1071                         # we also set the format suffix to the one requested
1072                         # in the URL: this way a request for e.g. .tgz returns
1073                         # a .tgz instead of a .tar.gz
1074                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1075                         last;
1076                 }
1077         }
1078 }
1079
1080 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1081      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1082      $searchtext, $search_regexp, $project_filter);
1083 sub evaluate_and_validate_params {
1084         our $action = $input_params{'action'};
1085         if (defined $action) {
1086                 if (!is_valid_action($action)) {
1087                         die_error(400, "Invalid action parameter");
1088                 }
1089         }
1090
1091         # parameters which are pathnames
1092         our $project = $input_params{'project'};
1093         if (defined $project) {
1094                 if (!is_valid_project($project)) {
1095                         undef $project;
1096                         die_error(404, "No such project");
1097                 }
1098         }
1099
1100         our $project_filter = $input_params{'project_filter'};
1101         if (defined $project_filter) {
1102                 if (!is_valid_pathname($project_filter)) {
1103                         die_error(404, "Invalid project_filter parameter");
1104                 }
1105         }
1106
1107         our $file_name = $input_params{'file_name'};
1108         if (defined $file_name) {
1109                 if (!is_valid_pathname($file_name)) {
1110                         die_error(400, "Invalid file parameter");
1111                 }
1112         }
1113
1114         our $file_parent = $input_params{'file_parent'};
1115         if (defined $file_parent) {
1116                 if (!is_valid_pathname($file_parent)) {
1117                         die_error(400, "Invalid file parent parameter");
1118                 }
1119         }
1120
1121         # parameters which are refnames
1122         our $hash = $input_params{'hash'};
1123         if (defined $hash) {
1124                 if (!is_valid_refname($hash)) {
1125                         die_error(400, "Invalid hash parameter");
1126                 }
1127         }
1128
1129         our $hash_parent = $input_params{'hash_parent'};
1130         if (defined $hash_parent) {
1131                 if (!is_valid_refname($hash_parent)) {
1132                         die_error(400, "Invalid hash parent parameter");
1133                 }
1134         }
1135
1136         our $hash_base = $input_params{'hash_base'};
1137         if (defined $hash_base) {
1138                 if (!is_valid_refname($hash_base)) {
1139                         die_error(400, "Invalid hash base parameter");
1140                 }
1141         }
1142
1143         our @extra_options = @{$input_params{'extra_options'}};
1144         # @extra_options is always defined, since it can only be (currently) set from
1145         # CGI, and $cgi->param() returns the empty array in array context if the param
1146         # is not set
1147         foreach my $opt (@extra_options) {
1148                 if (not exists $allowed_options{$opt}) {
1149                         die_error(400, "Invalid option parameter");
1150                 }
1151                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1152                         die_error(400, "Invalid option parameter for this action");
1153                 }
1154         }
1155
1156         our $hash_parent_base = $input_params{'hash_parent_base'};
1157         if (defined $hash_parent_base) {
1158                 if (!is_valid_refname($hash_parent_base)) {
1159                         die_error(400, "Invalid hash parent base parameter");
1160                 }
1161         }
1162
1163         # other parameters
1164         our $page = $input_params{'page'};
1165         if (defined $page) {
1166                 if ($page =~ m/[^0-9]/) {
1167                         die_error(400, "Invalid page parameter");
1168                 }
1169         }
1170
1171         our $searchtype = $input_params{'searchtype'};
1172         if (defined $searchtype) {
1173                 if ($searchtype =~ m/[^a-z]/) {
1174                         die_error(400, "Invalid searchtype parameter");
1175                 }
1176         }
1177
1178         our $search_use_regexp = $input_params{'search_use_regexp'};
1179
1180         our $searchtext = $input_params{'searchtext'};
1181         our $search_regexp = undef;
1182         if (defined $searchtext) {
1183                 if (length($searchtext) < 2) {
1184                         die_error(403, "At least two characters are required for search parameter");
1185                 }
1186                 if ($search_use_regexp) {
1187                         $search_regexp = $searchtext;
1188                         if (!eval { qr/$search_regexp/; 1; }) {
1189                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1190                                 die_error(400, "Invalid search regexp '$search_regexp'",
1191                                           esc_html($error));
1192                         }
1193                 } else {
1194                         $search_regexp = quotemeta $searchtext;
1195                 }
1196         }
1197 }
1198
1199 # path to the current git repository
1200 our $git_dir;
1201 sub evaluate_git_dir {
1202         our $git_dir = "$projectroot/$project" if $project;
1203 }
1204
1205 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1206 sub configure_gitweb_features {
1207         # list of supported snapshot formats
1208         our @snapshot_fmts = gitweb_get_feature('snapshot');
1209         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1210
1211         our ($git_avatar) = gitweb_get_feature('avatar');
1212         $git_avatar = '' unless $git_avatar =~ /^(?:gravatar|picon)$/s;
1213
1214         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1215         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1216 }
1217
1218 sub get_branch_refs {
1219         return ('heads', @extra_branch_refs);
1220 }
1221
1222 # custom error handler: 'die <message>' is Internal Server Error
1223 sub handle_errors_html {
1224         my $msg = shift; # it is already HTML escaped
1225
1226         # to avoid infinite loop where error occurs in die_error,
1227         # change handler to default handler, disabling handle_errors_html
1228         set_message("Error occurred when inside die_error:\n$msg");
1229
1230         # you cannot jump out of die_error when called as error handler;
1231         # the subroutine set via CGI::Carp::set_message is called _after_
1232         # HTTP headers are already written, so it cannot write them itself
1233         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1234 }
1235 set_message(\&handle_errors_html);
1236
1237 # dispatch
1238 sub dispatch {
1239         if (!defined $action) {
1240                 if (defined $hash) {
1241                         $action = git_get_type($hash);
1242                         $action or die_error(404, "Object does not exist");
1243                 } elsif (defined $hash_base && defined $file_name) {
1244                         $action = git_get_type("$hash_base:$file_name");
1245                         $action or die_error(404, "File or directory does not exist");
1246                 } elsif (defined $project) {
1247                         $action = 'summary';
1248                 } else {
1249                         $action = 'project_list';
1250                 }
1251         }
1252         if (!defined($actions{$action})) {
1253                 die_error(400, "Unknown action");
1254         }
1255         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1256             !$project) {
1257                 die_error(400, "Project needed");
1258         }
1259         $actions{$action}->();
1260 }
1261
1262 sub reset_timer {
1263         our $t0 = [ gettimeofday() ]
1264                 if defined $t0;
1265         our $number_of_git_cmds = 0;
1266 }
1267
1268 our $first_request = 1;
1269 sub run_request {
1270         reset_timer();
1271
1272         evaluate_uri();
1273         if ($first_request) {
1274                 evaluate_gitweb_config();
1275                 evaluate_git_version();
1276         }
1277         if ($per_request_config) {
1278                 if (ref($per_request_config) eq 'CODE') {
1279                         $per_request_config->();
1280                 } elsif (!$first_request) {
1281                         evaluate_gitweb_config();
1282                 }
1283         }
1284         check_loadavg();
1285
1286         # $projectroot and $projects_list might be set in gitweb config file
1287         $projects_list ||= $projectroot;
1288
1289         evaluate_query_params();
1290         evaluate_path_info();
1291         evaluate_and_validate_params();
1292         evaluate_git_dir();
1293
1294         configure_gitweb_features();
1295
1296         dispatch();
1297 }
1298
1299 our $is_last_request = sub { 1 };
1300 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1301 our $CGI = 'CGI';
1302 our $cgi;
1303 our $FCGI_Stream_PRINT_raw = \&FCGI::Stream::PRINT;
1304 sub configure_as_fcgi {
1305         require CGI::Fast;
1306         our $CGI = 'CGI::Fast';
1307         # FCGI is not Unicode aware hence the UTF-8 encoding must be done manually.
1308         # However no encoding must be done within git_blob_plain() and git_snapshot()
1309         # which must still output in raw binary mode.
1310         no warnings 'redefine';
1311         my $enc = Encode::find_encoding('UTF-8');
1312         *FCGI::Stream::PRINT = sub {
1313                 my @OUTPUT = @_;
1314                 for (my $i = 1; $i < @_; $i++) {
1315                         $OUTPUT[$i] = $enc->encode($_[$i], Encode::FB_CROAK|Encode::LEAVE_SRC);
1316                 }
1317                 @_ = @OUTPUT;
1318                 goto $FCGI_Stream_PRINT_raw;
1319         };
1320
1321         my $request_number = 0;
1322         # let each child service 100 requests
1323         our $is_last_request = sub { ++$request_number > 100 };
1324 }
1325 sub evaluate_argv {
1326         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1327         configure_as_fcgi()
1328                 if $script_name =~ /\.fcgi$/;
1329
1330         return unless (@ARGV);
1331
1332         require Getopt::Long;
1333         Getopt::Long::GetOptions(
1334                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1335                 'nproc|n=i' => sub {
1336                         my ($arg, $val) = @_;
1337                         return unless eval { require FCGI::ProcManager; 1; };
1338                         my $proc_manager = FCGI::ProcManager->new({
1339                                 n_processes => $val,
1340                         });
1341                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1342                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1343                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1344                 },
1345         );
1346 }
1347
1348 sub run {
1349         evaluate_argv();
1350
1351         $first_request = 1;
1352         $pre_listen_hook->()
1353                 if $pre_listen_hook;
1354
1355  REQUEST:
1356         while ($cgi = $CGI->new()) {
1357                 $pre_dispatch_hook->()
1358                         if $pre_dispatch_hook;
1359
1360                 run_request();
1361
1362                 $post_dispatch_hook->()
1363                         if $post_dispatch_hook;
1364                 $first_request = 0;
1365
1366                 last REQUEST if ($is_last_request->());
1367         }
1368
1369  DONE_GITWEB:
1370         1;
1371 }
1372
1373 run();
1374
1375 if (defined caller) {
1376         # wrapped in a subroutine processing requests,
1377         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1378         return;
1379 } else {
1380         # pure CGI script, serving single request
1381         exit;
1382 }
1383
1384 ## ======================================================================
1385 ## action links
1386
1387 # possible values of extra options
1388 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1389 # -replay => 1      - start from a current view (replay with modifications)
1390 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1391 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1392 sub href {
1393         my %params = @_;
1394         # default is to use -absolute url() i.e. $my_uri
1395         my $href = $params{-full} ? $my_url : $my_uri;
1396
1397         # implicit -replay, must be first of implicit params
1398         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1399
1400         $params{'project'} = $project unless exists $params{'project'};
1401
1402         if ($params{-replay}) {
1403                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1404                         if (!exists $params{$name}) {
1405                                 $params{$name} = $input_params{$name};
1406                         }
1407                 }
1408         }
1409
1410         my $use_pathinfo = gitweb_check_feature('pathinfo');
1411         if (defined $params{'project'} &&
1412             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1413                 # try to put as many parameters as possible in PATH_INFO:
1414                 #   - project name
1415                 #   - action
1416                 #   - hash_parent or hash_parent_base:/file_parent
1417                 #   - hash or hash_base:/filename
1418                 #   - the snapshot_format as an appropriate suffix
1419
1420                 # When the script is the root DirectoryIndex for the domain,
1421                 # $href here would be something like http://gitweb.example.com/
1422                 # Thus, we strip any trailing / from $href, to spare us double
1423                 # slashes in the final URL
1424                 $href =~ s,/$,,;
1425
1426                 # Then add the project name, if present
1427                 $href .= "/".esc_path_info($params{'project'});
1428                 delete $params{'project'};
1429
1430                 # since we destructively absorb parameters, we keep this
1431                 # boolean that remembers if we're handling a snapshot
1432                 my $is_snapshot = $params{'action'} eq 'snapshot';
1433
1434                 # Summary just uses the project path URL, any other action is
1435                 # added to the URL
1436                 if (defined $params{'action'}) {
1437                         $href .= "/".esc_path_info($params{'action'})
1438                                 unless $params{'action'} eq 'summary';
1439                         delete $params{'action'};
1440                 }
1441
1442                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1443                 # stripping nonexistent or useless pieces
1444                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1445                         || $params{'hash_parent'} || $params{'hash'});
1446                 if (defined $params{'hash_base'}) {
1447                         if (defined $params{'hash_parent_base'}) {
1448                                 $href .= esc_path_info($params{'hash_parent_base'});
1449                                 # skip the file_parent if it's the same as the file_name
1450                                 if (defined $params{'file_parent'}) {
1451                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1452                                                 delete $params{'file_parent'};
1453                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1454                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1455                                                 delete $params{'file_parent'};
1456                                         }
1457                                 }
1458                                 $href .= "..";
1459                                 delete $params{'hash_parent'};
1460                                 delete $params{'hash_parent_base'};
1461                         } elsif (defined $params{'hash_parent'}) {
1462                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1463                                 delete $params{'hash_parent'};
1464                         }
1465
1466                         $href .= esc_path_info($params{'hash_base'});
1467                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1468                                 $href .= ":/".esc_path_info($params{'file_name'});
1469                                 delete $params{'file_name'};
1470                         }
1471                         delete $params{'hash'};
1472                         delete $params{'hash_base'};
1473                 } elsif (defined $params{'hash'}) {
1474                         $href .= esc_path_info($params{'hash'});
1475                         delete $params{'hash'};
1476                 }
1477
1478                 # If the action was a snapshot, we can absorb the
1479                 # snapshot_format parameter too
1480                 if ($is_snapshot) {
1481                         my $fmt = $params{'snapshot_format'};
1482                         # snapshot_format should always be defined when href()
1483                         # is called, but just in case some code forgets, we
1484                         # fall back to the default
1485                         $fmt ||= $snapshot_fmts[0];
1486                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1487                         delete $params{'snapshot_format'};
1488                 }
1489         }
1490
1491         # now encode the parameters explicitly
1492         my @result = ();
1493         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1494                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1495                 if (defined $params{$name}) {
1496                         if (ref($params{$name}) eq "ARRAY") {
1497                                 foreach my $par (@{$params{$name}}) {
1498                                         push @result, $symbol . "=" . esc_param($par);
1499                                 }
1500                         } else {
1501                                 push @result, $symbol . "=" . esc_param($params{$name});
1502                         }
1503                 }
1504         }
1505         $href .= "?" . join(';', @result) if scalar @result;
1506
1507         # final transformation: trailing spaces must be escaped (URI-encoded)
1508         $href =~ s/(\s+)$/CGI::escape($1)/e;
1509
1510         if ($params{-anchor}) {
1511                 $href .= "#".esc_param($params{-anchor});
1512         }
1513
1514         return $href;
1515 }
1516
1517
1518 ## ======================================================================
1519 ## validation, quoting/unquoting and escaping
1520
1521 sub is_valid_action {
1522         my $input = shift;
1523         return undef unless exists $actions{$input};
1524         return 1;
1525 }
1526
1527 sub is_valid_project {
1528         my $input = shift;
1529
1530         return unless defined $input;
1531         if (!is_valid_pathname($input) ||
1532                 !(-d "$projectroot/$input") ||
1533                 !check_export_ok("$projectroot/$input") ||
1534                 ($strict_export && !project_in_list($input))) {
1535                 return undef;
1536         } else {
1537                 return 1;
1538         }
1539 }
1540
1541 sub is_valid_pathname {
1542         my $input = shift;
1543
1544         return undef unless defined $input;
1545         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1546         # at the beginning, at the end, and between slashes.
1547         # also this catches doubled slashes
1548         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1549                 return undef;
1550         }
1551         # no null characters
1552         if ($input =~ m!\0!) {
1553                 return undef;
1554         }
1555         return 1;
1556 }
1557
1558 sub is_valid_ref_format {
1559         my $input = shift;
1560
1561         return undef unless defined $input;
1562         # restrictions on ref name according to git-check-ref-format
1563         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1564                 return undef;
1565         }
1566         return 1;
1567 }
1568
1569 sub is_valid_refname {
1570         my $input = shift;
1571
1572         return undef unless defined $input;
1573         # textual hashes are O.K.
1574         if ($input =~ m/^$oid_regex$/) {
1575                 return 1;
1576         }
1577         # it must be correct pathname
1578         is_valid_pathname($input) or return undef;
1579         # check git-check-ref-format restrictions
1580         is_valid_ref_format($input) or return undef;
1581         return 1;
1582 }
1583
1584 # decode sequences of octets in utf8 into Perl's internal form,
1585 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1586 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1587 sub to_utf8 {
1588         my $str = shift;
1589         return undef unless defined $str;
1590
1591         if (utf8::is_utf8($str) || utf8::decode($str)) {
1592                 return $str;
1593         } else {
1594                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1595         }
1596 }
1597
1598 # quote unsafe chars, but keep the slash, even when it's not
1599 # correct, but quoted slashes look too horrible in bookmarks
1600 sub esc_param {
1601         my $str = shift;
1602         return undef unless defined $str;
1603         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1604         $str =~ s/ /\+/g;
1605         return $str;
1606 }
1607
1608 # the quoting rules for path_info fragment are slightly different
1609 sub esc_path_info {
1610         my $str = shift;
1611         return undef unless defined $str;
1612
1613         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1614         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1615
1616         return $str;
1617 }
1618
1619 # quote unsafe chars in whole URL, so some characters cannot be quoted
1620 sub esc_url {
1621         my $str = shift;
1622         return undef unless defined $str;
1623         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1624         $str =~ s/ /\+/g;
1625         return $str;
1626 }
1627
1628 # quote unsafe characters in HTML attributes
1629 sub esc_attr {
1630
1631         # for XHTML conformance escaping '"' to '&quot;' is not enough
1632         return esc_html(@_);
1633 }
1634
1635 # replace invalid utf8 character with SUBSTITUTION sequence
1636 sub esc_html {
1637         my $str = shift;
1638         my %opts = @_;
1639
1640         return undef unless defined $str;
1641
1642         $str = to_utf8($str);
1643         $str = $cgi->escapeHTML($str);
1644         if ($opts{'-nbsp'}) {
1645                 $str =~ s/ /&nbsp;/g;
1646         }
1647         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1648         return $str;
1649 }
1650
1651 # quote control characters and escape filename to HTML
1652 sub esc_path {
1653         my $str = shift;
1654         my %opts = @_;
1655
1656         return undef unless defined $str;
1657
1658         $str = to_utf8($str);
1659         $str = $cgi->escapeHTML($str);
1660         if ($opts{'-nbsp'}) {
1661                 $str =~ s/ /&nbsp;/g;
1662         }
1663         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1664         return $str;
1665 }
1666
1667 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1668 sub sanitize {
1669         my $str = shift;
1670
1671         return undef unless defined $str;
1672
1673         $str = to_utf8($str);
1674         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1675         return $str;
1676 }
1677
1678 # Make control characters "printable", using character escape codes (CEC)
1679 sub quot_cec {
1680         my $cntrl = shift;
1681         my %opts = @_;
1682         my %es = ( # character escape codes, aka escape sequences
1683                 "\t" => '\t',   # tab             (HT)
1684                 "\n" => '\n',   # line feed       (LF)
1685                 "\r" => '\r',   # carriage return (CR)
1686                 "\f" => '\f',   # form feed       (FF)
1687                 "\b" => '\b',   # backspace       (BS)
1688                 "\a" => '\a',   # alarm (bell)    (BEL)
1689                 "\e" => '\e',   # escape          (ESC)
1690                 "\013" => '\v', # vertical tab    (VT)
1691                 "\000" => '\0', # nul character   (NUL)
1692         );
1693         my $chr = ( (exists $es{$cntrl})
1694                     ? $es{$cntrl}
1695                     : sprintf('\%2x', ord($cntrl)) );
1696         if ($opts{-nohtml}) {
1697                 return $chr;
1698         } else {
1699                 return "<span class=\"cntrl\">$chr</span>";
1700         }
1701 }
1702
1703 # Alternatively use unicode control pictures codepoints,
1704 # Unicode "printable representation" (PR)
1705 sub quot_upr {
1706         my $cntrl = shift;
1707         my %opts = @_;
1708
1709         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1710         if ($opts{-nohtml}) {
1711                 return $chr;
1712         } else {
1713                 return "<span class=\"cntrl\">$chr</span>";
1714         }
1715 }
1716
1717 # git may return quoted and escaped filenames
1718 sub unquote {
1719         my $str = shift;
1720
1721         sub unq {
1722                 my $seq = shift;
1723                 my %es = ( # character escape codes, aka escape sequences
1724                         't' => "\t",   # tab            (HT, TAB)
1725                         'n' => "\n",   # newline        (NL)
1726                         'r' => "\r",   # return         (CR)
1727                         'f' => "\f",   # form feed      (FF)
1728                         'b' => "\b",   # backspace      (BS)
1729                         'a' => "\a",   # alarm (bell)   (BEL)
1730                         'e' => "\e",   # escape         (ESC)
1731                         'v' => "\013", # vertical tab   (VT)
1732                 );
1733
1734                 if ($seq =~ m/^[0-7]{1,3}$/) {
1735                         # octal char sequence
1736                         return chr(oct($seq));
1737                 } elsif (exists $es{$seq}) {
1738                         # C escape sequence, aka character escape code
1739                         return $es{$seq};
1740                 }
1741                 # quoted ordinary character
1742                 return $seq;
1743         }
1744
1745         if ($str =~ m/^"(.*)"$/) {
1746                 # needs unquoting
1747                 $str = $1;
1748                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1749         }
1750         return $str;
1751 }
1752
1753 # escape tabs (convert tabs to spaces)
1754 sub untabify {
1755         my $line = shift;
1756
1757         while ((my $pos = index($line, "\t")) != -1) {
1758                 if (my $count = (8 - ($pos % 8))) {
1759                         my $spaces = ' ' x $count;
1760                         $line =~ s/\t/$spaces/;
1761                 }
1762         }
1763
1764         return $line;
1765 }
1766
1767 sub project_in_list {
1768         my $project = shift;
1769         my @list = git_get_projects_list();
1770         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1771 }
1772
1773 ## ----------------------------------------------------------------------
1774 ## HTML aware string manipulation
1775
1776 # Try to chop given string on a word boundary between position
1777 # $len and $len+$add_len. If there is no word boundary there,
1778 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1779 # (marking chopped part) would be longer than given string.
1780 sub chop_str {
1781         my $str = shift;
1782         my $len = shift;
1783         my $add_len = shift || 10;
1784         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1785
1786         # Make sure perl knows it is utf8 encoded so we don't
1787         # cut in the middle of a utf8 multibyte char.
1788         $str = to_utf8($str);
1789
1790         # allow only $len chars, but don't cut a word if it would fit in $add_len
1791         # if it doesn't fit, cut it if it's still longer than the dots we would add
1792         # remove chopped character entities entirely
1793
1794         # when chopping in the middle, distribute $len into left and right part
1795         # return early if chopping wouldn't make string shorter
1796         if ($where eq 'center') {
1797                 return $str if ($len + 5 >= length($str)); # filler is length 5
1798                 $len = int($len/2);
1799         } else {
1800                 return $str if ($len + 4 >= length($str)); # filler is length 4
1801         }
1802
1803         # regexps: ending and beginning with word part up to $add_len
1804         my $endre = qr/.{$len}\w{0,$add_len}/;
1805         my $begre = qr/\w{0,$add_len}.{$len}/;
1806
1807         if ($where eq 'left') {
1808                 $str =~ m/^(.*?)($begre)$/;
1809                 my ($lead, $body) = ($1, $2);
1810                 if (length($lead) > 4) {
1811                         $lead = " ...";
1812                 }
1813                 return "$lead$body";
1814
1815         } elsif ($where eq 'center') {
1816                 $str =~ m/^($endre)(.*)$/;
1817                 my ($left, $str)  = ($1, $2);
1818                 $str =~ m/^(.*?)($begre)$/;
1819                 my ($mid, $right) = ($1, $2);
1820                 if (length($mid) > 5) {
1821                         $mid = " ... ";
1822                 }
1823                 return "$left$mid$right";
1824
1825         } else {
1826                 $str =~ m/^($endre)(.*)$/;
1827                 my $body = $1;
1828                 my $tail = $2;
1829                 if (length($tail) > 4) {
1830                         $tail = "... ";
1831                 }
1832                 return "$body$tail";
1833         }
1834 }
1835
1836 # takes the same arguments as chop_str, but also wraps a <span> around the
1837 # result with a title attribute if it does get chopped. Additionally, the
1838 # string is HTML-escaped.
1839 sub chop_and_escape_str {
1840         my ($str) = @_;
1841
1842         my $chopped = chop_str(@_);
1843         $str = to_utf8($str);
1844         if ($chopped eq $str) {
1845                 return esc_html($chopped);
1846         } else {
1847                 $str =~ s/[[:cntrl:]]/?/g;
1848                 return $cgi->span({-title=>$str}, esc_html($chopped));
1849         }
1850 }
1851
1852 # Highlight selected fragments of string, using given CSS class,
1853 # and escape HTML.  It is assumed that fragments do not overlap.
1854 # Regions are passed as list of pairs (array references).
1855 #
1856 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1857 # '<span class="mark">foo</span>bar'
1858 sub esc_html_hl_regions {
1859         my ($str, $css_class, @sel) = @_;
1860         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1861         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1862         return esc_html($str, %opts) unless @sel;
1863
1864         my $out = '';
1865         my $pos = 0;
1866
1867         for my $s (@sel) {
1868                 my ($begin, $end) = @$s;
1869
1870                 # Don't create empty <span> elements.
1871                 next if $end <= $begin;
1872
1873                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1874                                        %opts);
1875
1876                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1877                         if ($begin - $pos > 0);
1878                 $out .= $cgi->span({-class => $css_class}, $escaped);
1879
1880                 $pos = $end;
1881         }
1882         $out .= esc_html(substr($str, $pos), %opts)
1883                 if ($pos < length($str));
1884
1885         return $out;
1886 }
1887
1888 # return positions of beginning and end of each match
1889 sub matchpos_list {
1890         my ($str, $regexp) = @_;
1891         return unless (defined $str && defined $regexp);
1892
1893         my @matches;
1894         while ($str =~ /$regexp/g) {
1895                 push @matches, [$-[0], $+[0]];
1896         }
1897         return @matches;
1898 }
1899
1900 # highlight match (if any), and escape HTML
1901 sub esc_html_match_hl {
1902         my ($str, $regexp) = @_;
1903         return esc_html($str) unless defined $regexp;
1904
1905         my @matches = matchpos_list($str, $regexp);
1906         return esc_html($str) unless @matches;
1907
1908         return esc_html_hl_regions($str, 'match', @matches);
1909 }
1910
1911
1912 # highlight match (if any) of shortened string, and escape HTML
1913 sub esc_html_match_hl_chopped {
1914         my ($str, $chopped, $regexp) = @_;
1915         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1916
1917         my @matches = matchpos_list($str, $regexp);
1918         return esc_html($chopped) unless @matches;
1919
1920         # filter matches so that we mark chopped string
1921         my $tail = "... "; # see chop_str
1922         unless ($chopped =~ s/\Q$tail\E$//) {
1923                 $tail = '';
1924         }
1925         my $chop_len = length($chopped);
1926         my $tail_len = length($tail);
1927         my @filtered;
1928
1929         for my $m (@matches) {
1930                 if ($m->[0] > $chop_len) {
1931                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1932                         last;
1933                 } elsif ($m->[1] > $chop_len) {
1934                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1935                         last;
1936                 }
1937                 push @filtered, $m;
1938         }
1939
1940         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1941 }
1942
1943 ## ----------------------------------------------------------------------
1944 ## functions returning short strings
1945
1946 # CSS class for given age value (in seconds)
1947 sub age_class {
1948         my $age = shift;
1949
1950         if (!defined $age) {
1951                 return "noage";
1952         } elsif ($age < 60*60*2) {
1953                 return "age0";
1954         } elsif ($age < 60*60*24*2) {
1955                 return "age1";
1956         } else {
1957                 return "age2";
1958         }
1959 }
1960
1961 # convert age in seconds to "nn units ago" string
1962 sub age_string {
1963         my $age = shift;
1964         my $age_str;
1965
1966         if ($age > 60*60*24*365*2) {
1967                 $age_str = (int $age/60/60/24/365);
1968                 $age_str .= " years ago";
1969         } elsif ($age > 60*60*24*(365/12)*2) {
1970                 $age_str = int $age/60/60/24/(365/12);
1971                 $age_str .= " months ago";
1972         } elsif ($age > 60*60*24*7*2) {
1973                 $age_str = int $age/60/60/24/7;
1974                 $age_str .= " weeks ago";
1975         } elsif ($age > 60*60*24*2) {
1976                 $age_str = int $age/60/60/24;
1977                 $age_str .= " days ago";
1978         } elsif ($age > 60*60*2) {
1979                 $age_str = int $age/60/60;
1980                 $age_str .= " hours ago";
1981         } elsif ($age > 60*2) {
1982                 $age_str = int $age/60;
1983                 $age_str .= " min ago";
1984         } elsif ($age > 2) {
1985                 $age_str = int $age;
1986                 $age_str .= " sec ago";
1987         } else {
1988                 $age_str .= " right now";
1989         }
1990         return $age_str;
1991 }
1992
1993 use constant {
1994         S_IFINVALID => 0030000,
1995         S_IFGITLINK => 0160000,
1996 };
1997
1998 # submodule/subproject, a commit object reference
1999 sub S_ISGITLINK {
2000         my $mode = shift;
2001
2002         return (($mode & S_IFMT) == S_IFGITLINK)
2003 }
2004
2005 # convert file mode in octal to symbolic file mode string
2006 sub mode_str {
2007         my $mode = oct shift;
2008
2009         if (S_ISGITLINK($mode)) {
2010                 return 'm---------';
2011         } elsif (S_ISDIR($mode & S_IFMT)) {
2012                 return 'drwxr-xr-x';
2013         } elsif (S_ISLNK($mode)) {
2014                 return 'lrwxrwxrwx';
2015         } elsif (S_ISREG($mode)) {
2016                 # git cares only about the executable bit
2017                 if ($mode & S_IXUSR) {
2018                         return '-rwxr-xr-x';
2019                 } else {
2020                         return '-rw-r--r--';
2021                 };
2022         } else {
2023                 return '----------';
2024         }
2025 }
2026
2027 # convert file mode in octal to file type string
2028 sub file_type {
2029         my $mode = shift;
2030
2031         if ($mode !~ m/^[0-7]+$/) {
2032                 return $mode;
2033         } else {
2034                 $mode = oct $mode;
2035         }
2036
2037         if (S_ISGITLINK($mode)) {
2038                 return "submodule";
2039         } elsif (S_ISDIR($mode & S_IFMT)) {
2040                 return "directory";
2041         } elsif (S_ISLNK($mode)) {
2042                 return "symlink";
2043         } elsif (S_ISREG($mode)) {
2044                 return "file";
2045         } else {
2046                 return "unknown";
2047         }
2048 }
2049
2050 # convert file mode in octal to file type description string
2051 sub file_type_long {
2052         my $mode = shift;
2053
2054         if ($mode !~ m/^[0-7]+$/) {
2055                 return $mode;
2056         } else {
2057                 $mode = oct $mode;
2058         }
2059
2060         if (S_ISGITLINK($mode)) {
2061                 return "submodule";
2062         } elsif (S_ISDIR($mode & S_IFMT)) {
2063                 return "directory";
2064         } elsif (S_ISLNK($mode)) {
2065                 return "symlink";
2066         } elsif (S_ISREG($mode)) {
2067                 if ($mode & S_IXUSR) {
2068                         return "executable";
2069                 } else {
2070                         return "file";
2071                 };
2072         } else {
2073                 return "unknown";
2074         }
2075 }
2076
2077
2078 ## ----------------------------------------------------------------------
2079 ## functions returning short HTML fragments, or transforming HTML fragments
2080 ## which don't belong to other sections
2081
2082 # format line of commit message.
2083 sub format_log_line_html {
2084         my $line = shift;
2085
2086         # Potentially abbreviated OID.
2087         my $regex = oid_nlen_regex("7,64");
2088
2089         $line = esc_html($line, -nbsp=>1);
2090         $line =~ s{
2091         \b
2092         (
2093             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2094             # or hadoop-20160921-113441-20-g094fb7d
2095             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2096             [A-Za-z0-9.-]+
2097             (?!\.) # refs can't end with ".", see check_refname_format()
2098             -g$regex
2099             |
2100             # Just a normal looking Git SHA1
2101             $regex
2102         )
2103         \b
2104     }{
2105                 $cgi->a({-href => href(action=>"object", hash=>$1),
2106                                         -class => "text"}, $1);
2107         }egx;
2108
2109         return $line;
2110 }
2111
2112 # format marker of refs pointing to given object
2113
2114 # the destination action is chosen based on object type and current context:
2115 # - for annotated tags, we choose the tag view unless it's the current view
2116 #   already, in which case we go to shortlog view
2117 # - for other refs, we keep the current view if we're in history, shortlog or
2118 #   log view, and select shortlog otherwise
2119 sub format_ref_marker {
2120         my ($refs, $id) = @_;
2121         my $markers = '';
2122
2123         if (defined $refs->{$id}) {
2124                 foreach my $ref (@{$refs->{$id}}) {
2125                         # this code exploits the fact that non-lightweight tags are the
2126                         # only indirect objects, and that they are the only objects for which
2127                         # we want to use tag instead of shortlog as action
2128                         my ($type, $name) = qw();
2129                         my $indirect = ($ref =~ s/\^\{\}$//);
2130                         # e.g. tags/v2.6.11 or heads/next
2131                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2132                                 $type = $1;
2133                                 $name = $2;
2134                         } else {
2135                                 $type = "ref";
2136                                 $name = $ref;
2137                         }
2138
2139                         my $class = $type;
2140                         $class .= " indirect" if $indirect;
2141
2142                         my $dest_action = "shortlog";
2143
2144                         if ($indirect) {
2145                                 $dest_action = "tag" unless $action eq "tag";
2146                         } elsif ($action =~ /^(history|(short)?log)$/) {
2147                                 $dest_action = $action;
2148                         }
2149
2150                         my $dest = "";
2151                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2152                         $dest .= $ref;
2153
2154                         my $link = $cgi->a({
2155                                 -href => href(
2156                                         action=>$dest_action,
2157                                         hash=>$dest
2158                                 )}, esc_html($name));
2159
2160                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2161                                 $link . "</span>";
2162                 }
2163         }
2164
2165         if ($markers) {
2166                 return ' <span class="refs">'. $markers . '</span>';
2167         } else {
2168                 return "";
2169         }
2170 }
2171
2172 # format, perhaps shortened and with markers, title line
2173 sub format_subject_html {
2174         my ($long, $short, $href, $extra) = @_;
2175         $extra = '' unless defined($extra);
2176
2177         if (length($short) < length($long)) {
2178                 $long =~ s/[[:cntrl:]]/?/g;
2179                 return $cgi->a({-href => $href, -class => "list subject",
2180                                 -title => to_utf8($long)},
2181                        esc_html($short)) . $extra;
2182         } else {
2183                 return $cgi->a({-href => $href, -class => "list subject"},
2184                        esc_html($long)) . $extra;
2185         }
2186 }
2187
2188 # Rather than recomputing the url for an email multiple times, we cache it
2189 # after the first hit. This gives a visible benefit in views where the avatar
2190 # for the same email is used repeatedly (e.g. shortlog).
2191 # The cache is shared by all avatar engines (currently gravatar only), which
2192 # are free to use it as preferred. Since only one avatar engine is used for any
2193 # given page, there's no risk for cache conflicts.
2194 our %avatar_cache = ();
2195
2196 # Compute the picon url for a given email, by using the picon search service over at
2197 # http://www.cs.indiana.edu/picons/search.html
2198 sub picon_url {
2199         my $email = lc shift;
2200         if (!$avatar_cache{$email}) {
2201                 my ($user, $domain) = split('@', $email);
2202                 $avatar_cache{$email} =
2203                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2204                         "$domain/$user/" .
2205                         "users+domains+unknown/up/single";
2206         }
2207         return $avatar_cache{$email};
2208 }
2209
2210 # Compute the gravatar url for a given email, if it's not in the cache already.
2211 # Gravatar stores only the part of the URL before the size, since that's the
2212 # one computationally more expensive. This also allows reuse of the cache for
2213 # different sizes (for this particular engine).
2214 sub gravatar_url {
2215         my $email = lc shift;
2216         my $size = shift;
2217         $avatar_cache{$email} ||=
2218                 "//www.gravatar.com/avatar/" .
2219                         md5_hex($email) . "?s=";
2220         return $avatar_cache{$email} . $size;
2221 }
2222
2223 # Insert an avatar for the given $email at the given $size if the feature
2224 # is enabled.
2225 sub git_get_avatar {
2226         my ($email, %opts) = @_;
2227         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2228         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2229         $opts{-size} ||= 'default';
2230         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2231         my $url = "";
2232         if ($git_avatar eq 'gravatar') {
2233                 $url = gravatar_url($email, $size);
2234         } elsif ($git_avatar eq 'picon') {
2235                 $url = picon_url($email);
2236         }
2237         # Other providers can be added by extending the if chain, defining $url
2238         # as needed. If no variant puts something in $url, we assume avatars
2239         # are completely disabled/unavailable.
2240         if ($url) {
2241                 return $pre_white .
2242                        "<img width=\"$size\" " .
2243                             "class=\"avatar\" " .
2244                             "src=\"".esc_url($url)."\" " .
2245                             "alt=\"\" " .
2246                        "/>" . $post_white;
2247         } else {
2248                 return "";
2249         }
2250 }
2251
2252 sub format_search_author {
2253         my ($author, $searchtype, $displaytext) = @_;
2254         my $have_search = gitweb_check_feature('search');
2255
2256         if ($have_search) {
2257                 my $performed = "";
2258                 if ($searchtype eq 'author') {
2259                         $performed = "authored";
2260                 } elsif ($searchtype eq 'committer') {
2261                         $performed = "committed";
2262                 }
2263
2264                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2265                                 searchtext=>$author,
2266                                 searchtype=>$searchtype), class=>"list",
2267                                 title=>"Search for commits $performed by $author"},
2268                                 $displaytext);
2269
2270         } else {
2271                 return $displaytext;
2272         }
2273 }
2274
2275 # format the author name of the given commit with the given tag
2276 # the author name is chopped and escaped according to the other
2277 # optional parameters (see chop_str).
2278 sub format_author_html {
2279         my $tag = shift;
2280         my $co = shift;
2281         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2282         return "<$tag class=\"author\">" .
2283                format_search_author($co->{'author_name'}, "author",
2284                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2285                        $author) .
2286                "</$tag>";
2287 }
2288
2289 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2290 sub format_git_diff_header_line {
2291         my $line = shift;
2292         my $diffinfo = shift;
2293         my ($from, $to) = @_;
2294
2295         if ($diffinfo->{'nparents'}) {
2296                 # combined diff
2297                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2298                 if ($to->{'href'}) {
2299                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2300                                          esc_path($to->{'file'}));
2301                 } else { # file was deleted (no href)
2302                         $line .= esc_path($to->{'file'});
2303                 }
2304         } else {
2305                 # "ordinary" diff
2306                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2307                 if ($from->{'href'}) {
2308                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2309                                          'a/' . esc_path($from->{'file'}));
2310                 } else { # file was added (no href)
2311                         $line .= 'a/' . esc_path($from->{'file'});
2312                 }
2313                 $line .= ' ';
2314                 if ($to->{'href'}) {
2315                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2316                                          'b/' . esc_path($to->{'file'}));
2317                 } else { # file was deleted
2318                         $line .= 'b/' . esc_path($to->{'file'});
2319                 }
2320         }
2321
2322         return "<div class=\"diff header\">$line</div>\n";
2323 }
2324
2325 # format extended diff header line, before patch itself
2326 sub format_extended_diff_header_line {
2327         my $line = shift;
2328         my $diffinfo = shift;
2329         my ($from, $to) = @_;
2330
2331         # match <path>
2332         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2333                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2334                                        esc_path($from->{'file'}));
2335         }
2336         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2337                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2338                                  esc_path($to->{'file'}));
2339         }
2340         # match single <mode>
2341         if ($line =~ m/\s(\d{6})$/) {
2342                 $line .= '<span class="info"> (' .
2343                          file_type_long($1) .
2344                          ')</span>';
2345         }
2346         # match <hash>
2347         if ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", ",") |
2348             $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", ",")) {
2349                 # can match only for combined diff
2350                 $line = 'index ';
2351                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2352                         if ($from->{'href'}[$i]) {
2353                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2354                                                   -class=>"hash"},
2355                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2356                         } else {
2357                                 $line .= '0' x 7;
2358                         }
2359                         # separator
2360                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2361                 }
2362                 $line .= '..';
2363                 if ($to->{'href'}) {
2364                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2365                                          substr($diffinfo->{'to_id'},0,7));
2366                 } else {
2367                         $line .= '0' x 7;
2368                 }
2369
2370         } elsif ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", "..") |
2371                  $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", "..")) {
2372                 # can match only for ordinary diff
2373                 my ($from_link, $to_link);
2374                 if ($from->{'href'}) {
2375                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2376                                              substr($diffinfo->{'from_id'},0,7));
2377                 } else {
2378                         $from_link = '0' x 7;
2379                 }
2380                 if ($to->{'href'}) {
2381                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2382                                            substr($diffinfo->{'to_id'},0,7));
2383                 } else {
2384                         $to_link = '0' x 7;
2385                 }
2386                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2387                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2388         }
2389
2390         return $line . "<br/>\n";
2391 }
2392
2393 # format from-file/to-file diff header
2394 sub format_diff_from_to_header {
2395         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2396         my $line;
2397         my $result = '';
2398
2399         $line = $from_line;
2400         #assert($line =~ m/^---/) if DEBUG;
2401         # no extra formatting for "^--- /dev/null"
2402         if (! $diffinfo->{'nparents'}) {
2403                 # ordinary (single parent) diff
2404                 if ($line =~ m!^--- "?a/!) {
2405                         if ($from->{'href'}) {
2406                                 $line = '--- a/' .
2407                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2408                                                 esc_path($from->{'file'}));
2409                         } else {
2410                                 $line = '--- a/' .
2411                                         esc_path($from->{'file'});
2412                         }
2413                 }
2414                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2415
2416         } else {
2417                 # combined diff (merge commit)
2418                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2419                         if ($from->{'href'}[$i]) {
2420                                 $line = '--- ' .
2421                                         $cgi->a({-href=>href(action=>"blobdiff",
2422                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2423                                                              hash_parent_base=>$parents[$i],
2424                                                              file_parent=>$from->{'file'}[$i],
2425                                                              hash=>$diffinfo->{'to_id'},
2426                                                              hash_base=>$hash,
2427                                                              file_name=>$to->{'file'}),
2428                                                  -class=>"path",
2429                                                  -title=>"diff" . ($i+1)},
2430                                                 $i+1) .
2431                                         '/' .
2432                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2433                                                 esc_path($from->{'file'}[$i]));
2434                         } else {
2435                                 $line = '--- /dev/null';
2436                         }
2437                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2438                 }
2439         }
2440
2441         $line = $to_line;
2442         #assert($line =~ m/^\+\+\+/) if DEBUG;
2443         # no extra formatting for "^+++ /dev/null"
2444         if ($line =~ m!^\+\+\+ "?b/!) {
2445                 if ($to->{'href'}) {
2446                         $line = '+++ b/' .
2447                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2448                                         esc_path($to->{'file'}));
2449                 } else {
2450                         $line = '+++ b/' .
2451                                 esc_path($to->{'file'});
2452                 }
2453         }
2454         $result .= qq!<div class="diff to_file">$line</div>\n!;
2455
2456         return $result;
2457 }
2458
2459 # create note for patch simplified by combined diff
2460 sub format_diff_cc_simplified {
2461         my ($diffinfo, @parents) = @_;
2462         my $result = '';
2463
2464         $result .= "<div class=\"diff header\">" .
2465                    "diff --cc ";
2466         if (!is_deleted($diffinfo)) {
2467                 $result .= $cgi->a({-href => href(action=>"blob",
2468                                                   hash_base=>$hash,
2469                                                   hash=>$diffinfo->{'to_id'},
2470                                                   file_name=>$diffinfo->{'to_file'}),
2471                                     -class => "path"},
2472                                    esc_path($diffinfo->{'to_file'}));
2473         } else {
2474                 $result .= esc_path($diffinfo->{'to_file'});
2475         }
2476         $result .= "</div>\n" . # class="diff header"
2477                    "<div class=\"diff nodifferences\">" .
2478                    "Simple merge" .
2479                    "</div>\n"; # class="diff nodifferences"
2480
2481         return $result;
2482 }
2483
2484 sub diff_line_class {
2485         my ($line, $from, $to) = @_;
2486
2487         # ordinary diff
2488         my $num_sign = 1;
2489         # combined diff
2490         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2491                 $num_sign = scalar @{$from->{'href'}};
2492         }
2493
2494         my @diff_line_classifier = (
2495                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2496                 { regexp => qr/^\\/,               class => "incomplete"  },
2497                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2498                 # classifier for context must come before classifier add/rem,
2499                 # or we would have to use more complicated regexp, for example
2500                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2501                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2502                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2503         );
2504         for my $clsfy (@diff_line_classifier) {
2505                 return $clsfy->{'class'}
2506                         if ($line =~ $clsfy->{'regexp'});
2507         }
2508
2509         # fallback
2510         return "";
2511 }
2512
2513 # assumes that $from and $to are defined and correctly filled,
2514 # and that $line holds a line of chunk header for unified diff
2515 sub format_unidiff_chunk_header {
2516         my ($line, $from, $to) = @_;
2517
2518         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2519                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2520
2521         $from_lines = 0 unless defined $from_lines;
2522         $to_lines   = 0 unless defined $to_lines;
2523
2524         if ($from->{'href'}) {
2525                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2526                                      -class=>"list"}, $from_text);
2527         }
2528         if ($to->{'href'}) {
2529                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2530                                      -class=>"list"}, $to_text);
2531         }
2532         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2533                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2534         return $line;
2535 }
2536
2537 # assumes that $from and $to are defined and correctly filled,
2538 # and that $line holds a line of chunk header for combined diff
2539 sub format_cc_diff_chunk_header {
2540         my ($line, $from, $to) = @_;
2541
2542         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2543         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2544
2545         @from_text = split(' ', $ranges);
2546         for (my $i = 0; $i < @from_text; ++$i) {
2547                 ($from_start[$i], $from_nlines[$i]) =
2548                         (split(',', substr($from_text[$i], 1)), 0);
2549         }
2550
2551         $to_text   = pop @from_text;
2552         $to_start  = pop @from_start;
2553         $to_nlines = pop @from_nlines;
2554
2555         $line = "<span class=\"chunk_info\">$prefix ";
2556         for (my $i = 0; $i < @from_text; ++$i) {
2557                 if ($from->{'href'}[$i]) {
2558                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2559                                           -class=>"list"}, $from_text[$i]);
2560                 } else {
2561                         $line .= $from_text[$i];
2562                 }
2563                 $line .= " ";
2564         }
2565         if ($to->{'href'}) {
2566                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2567                                   -class=>"list"}, $to_text);
2568         } else {
2569                 $line .= $to_text;
2570         }
2571         $line .= " $prefix</span>" .
2572                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2573         return $line;
2574 }
2575
2576 # process patch (diff) line (not to be used for diff headers),
2577 # returning HTML-formatted (but not wrapped) line.
2578 # If the line is passed as a reference, it is treated as HTML and not
2579 # esc_html()'ed.
2580 sub format_diff_line {
2581         my ($line, $diff_class, $from, $to) = @_;
2582
2583         if (ref($line)) {
2584                 $line = $$line;
2585         } else {
2586                 chomp $line;
2587                 $line = untabify($line);
2588
2589                 if ($from && $to && $line =~ m/^\@{2} /) {
2590                         $line = format_unidiff_chunk_header($line, $from, $to);
2591                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2592                         $line = format_cc_diff_chunk_header($line, $from, $to);
2593                 } else {
2594                         $line = esc_html($line, -nbsp=>1);
2595                 }
2596         }
2597
2598         my $diff_classes = "diff";
2599         $diff_classes .= " $diff_class" if ($diff_class);
2600         $line = "<div class=\"$diff_classes\">$line</div>\n";
2601
2602         return $line;
2603 }
2604
2605 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2606 # linked.  Pass the hash of the tree/commit to snapshot.
2607 sub format_snapshot_links {
2608         my ($hash) = @_;
2609         my $num_fmts = @snapshot_fmts;
2610         if ($num_fmts > 1) {
2611                 # A parenthesized list of links bearing format names.
2612                 # e.g. "snapshot (_tar.gz_ _zip_)"
2613                 return "snapshot (" . join(' ', map
2614                         $cgi->a({
2615                                 -href => href(
2616                                         action=>"snapshot",
2617                                         hash=>$hash,
2618                                         snapshot_format=>$_
2619                                 )
2620                         }, $known_snapshot_formats{$_}{'display'})
2621                 , @snapshot_fmts) . ")";
2622         } elsif ($num_fmts == 1) {
2623                 # A single "snapshot" link whose tooltip bears the format name.
2624                 # i.e. "_snapshot_"
2625                 my ($fmt) = @snapshot_fmts;
2626                 return
2627                         $cgi->a({
2628                                 -href => href(
2629                                         action=>"snapshot",
2630                                         hash=>$hash,
2631                                         snapshot_format=>$fmt
2632                                 ),
2633                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2634                         }, "snapshot");
2635         } else { # $num_fmts == 0
2636                 return undef;
2637         }
2638 }
2639
2640 ## ......................................................................
2641 ## functions returning values to be passed, perhaps after some
2642 ## transformation, to other functions; e.g. returning arguments to href()
2643
2644 # returns hash to be passed to href to generate gitweb URL
2645 # in -title key it returns description of link
2646 sub get_feed_info {
2647         my $format = shift || 'Atom';
2648         my %res = (action => lc($format));
2649         my $matched_ref = 0;
2650
2651         # feed links are possible only for project views
2652         return unless (defined $project);
2653         # some views should link to OPML, or to generic project feed,
2654         # or don't have specific feed yet (so they should use generic)
2655         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2656
2657         my $branch = undef;
2658         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2659         # (fullname) to differentiate from tag links; this also makes
2660         # possible to detect branch links
2661         for my $ref (get_branch_refs()) {
2662                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2663                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2664                         $branch = $1;
2665                         $matched_ref = $ref;
2666                         last;
2667                 }
2668         }
2669         # find log type for feed description (title)
2670         my $type = 'log';
2671         if (defined $file_name) {
2672                 $type  = "history of $file_name";
2673                 $type .= "/" if ($action eq 'tree');
2674                 $type .= " on '$branch'" if (defined $branch);
2675         } else {
2676                 $type = "log of $branch" if (defined $branch);
2677         }
2678
2679         $res{-title} = $type;
2680         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2681         $res{'file_name'} = $file_name;
2682
2683         return %res;
2684 }
2685
2686 ## ----------------------------------------------------------------------
2687 ## git utility subroutines, invoking git commands
2688
2689 # returns path to the core git executable and the --git-dir parameter as list
2690 sub git_cmd {
2691         $number_of_git_cmds++;
2692         return $GIT, '--git-dir='.$git_dir;
2693 }
2694
2695 # quote the given arguments for passing them to the shell
2696 # quote_command("command", "arg 1", "arg with ' and ! characters")
2697 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2698 # Try to avoid using this function wherever possible.
2699 sub quote_command {
2700         return join(' ',
2701                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2702 }
2703
2704 # get HEAD ref of given project as hash
2705 sub git_get_head_hash {
2706         return git_get_full_hash(shift, 'HEAD');
2707 }
2708
2709 sub git_get_full_hash {
2710         return git_get_hash(@_);
2711 }
2712
2713 sub git_get_short_hash {
2714         return git_get_hash(@_, '--short=7');
2715 }
2716
2717 sub git_get_hash {
2718         my ($project, $hash, @options) = @_;
2719         my $o_git_dir = $git_dir;
2720         my $retval = undef;
2721         $git_dir = "$projectroot/$project";
2722         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2723             '--verify', '-q', @options, $hash) {
2724                 $retval = <$fd>;
2725                 chomp $retval if defined $retval;
2726                 close $fd;
2727         }
2728         if (defined $o_git_dir) {
2729                 $git_dir = $o_git_dir;
2730         }
2731         return $retval;
2732 }
2733
2734 # get type of given object
2735 sub git_get_type {
2736         my $hash = shift;
2737
2738         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2739         my $type = <$fd>;
2740         close $fd or return;
2741         chomp $type;
2742         return $type;
2743 }
2744
2745 # repository configuration
2746 our $config_file = '';
2747 our %config;
2748
2749 # store multiple values for single key as anonymous array reference
2750 # single values stored directly in the hash, not as [ <value> ]
2751 sub hash_set_multi {
2752         my ($hash, $key, $value) = @_;
2753
2754         if (!exists $hash->{$key}) {
2755                 $hash->{$key} = $value;
2756         } elsif (!ref $hash->{$key}) {
2757                 $hash->{$key} = [ $hash->{$key}, $value ];
2758         } else {
2759                 push @{$hash->{$key}}, $value;
2760         }
2761 }
2762
2763 # return hash of git project configuration
2764 # optionally limited to some section, e.g. 'gitweb'
2765 sub git_parse_project_config {
2766         my $section_regexp = shift;
2767         my %config;
2768
2769         local $/ = "\0";
2770
2771         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2772                 or return;
2773
2774         while (my $keyval = <$fh>) {
2775                 chomp $keyval;
2776                 my ($key, $value) = split(/\n/, $keyval, 2);
2777
2778                 hash_set_multi(\%config, $key, $value)
2779                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2780         }
2781         close $fh;
2782
2783         return %config;
2784 }
2785
2786 # convert config value to boolean: 'true' or 'false'
2787 # no value, number > 0, 'true' and 'yes' values are true
2788 # rest of values are treated as false (never as error)
2789 sub config_to_bool {
2790         my $val = shift;
2791
2792         return 1 if !defined $val;             # section.key
2793
2794         # strip leading and trailing whitespace
2795         $val =~ s/^\s+//;
2796         $val =~ s/\s+$//;
2797
2798         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2799                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2800 }
2801
2802 # convert config value to simple decimal number
2803 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2804 # to be multiplied by 1024, 1048576, or 1073741824
2805 sub config_to_int {
2806         my $val = shift;
2807
2808         # strip leading and trailing whitespace
2809         $val =~ s/^\s+//;
2810         $val =~ s/\s+$//;
2811
2812         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2813                 $unit = lc($unit);
2814                 # unknown unit is treated as 1
2815                 return $num * ($unit eq 'g' ? 1073741824 :
2816                                $unit eq 'm' ?    1048576 :
2817                                $unit eq 'k' ?       1024 : 1);
2818         }
2819         return $val;
2820 }
2821
2822 # convert config value to array reference, if needed
2823 sub config_to_multi {
2824         my $val = shift;
2825
2826         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2827 }
2828
2829 sub git_get_project_config {
2830         my ($key, $type) = @_;
2831
2832         return unless defined $git_dir;
2833
2834         # key sanity check
2835         return unless ($key);
2836         # only subsection, if exists, is case sensitive,
2837         # and not lowercased by 'git config -z -l'
2838         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2839                 $lo =~ s/_//g;
2840                 $key = join(".", lc($hi), $mi, lc($lo));
2841                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2842         } else {
2843                 $key = lc($key);
2844                 $key =~ s/_//g;
2845                 return if ($key =~ /\W/);
2846         }
2847         $key =~ s/^gitweb\.//;
2848
2849         # type sanity check
2850         if (defined $type) {
2851                 $type =~ s/^--//;
2852                 $type = undef
2853                         unless ($type eq 'bool' || $type eq 'int');
2854         }
2855
2856         # get config
2857         if (!defined $config_file ||
2858             $config_file ne "$git_dir/config") {
2859                 %config = git_parse_project_config('gitweb');
2860                 $config_file = "$git_dir/config";
2861         }
2862
2863         # check if config variable (key) exists
2864         return unless exists $config{"gitweb.$key"};
2865
2866         # ensure given type
2867         if (!defined $type) {
2868                 return $config{"gitweb.$key"};
2869         } elsif ($type eq 'bool') {
2870                 # backward compatibility: 'git config --bool' returns true/false
2871                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2872         } elsif ($type eq 'int') {
2873                 return config_to_int($config{"gitweb.$key"});
2874         }
2875         return $config{"gitweb.$key"};
2876 }
2877
2878 # get hash of given path at given ref
2879 sub git_get_hash_by_path {
2880         my $base = shift;
2881         my $path = shift || return undef;
2882         my $type = shift;
2883
2884         $path =~ s,/+$,,;
2885
2886         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2887                 or die_error(500, "Open git-ls-tree failed");
2888         my $line = <$fd>;
2889         close $fd or return undef;
2890
2891         if (!defined $line) {
2892                 # there is no tree or hash given by $path at $base
2893                 return undef;
2894         }
2895
2896         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2897         $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/;
2898         if (defined $type && $type ne $2) {
2899                 # type doesn't match
2900                 return undef;
2901         }
2902         return $3;
2903 }
2904
2905 # get path of entry with given hash at given tree-ish (ref)
2906 # used to get 'from' filename for combined diff (merge commit) for renames
2907 sub git_get_path_by_hash {
2908         my $base = shift || return;
2909         my $hash = shift || return;
2910
2911         local $/ = "\0";
2912
2913         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2914                 or return undef;
2915         while (my $line = <$fd>) {
2916                 chomp $line;
2917
2918                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2919                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2920                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2921                         close $fd;
2922                         return $1;
2923                 }
2924         }
2925         close $fd;
2926         return undef;
2927 }
2928
2929 ## ......................................................................
2930 ## git utility functions, directly accessing git repository
2931
2932 # get the value of config variable either from file named as the variable
2933 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2934 # configuration variable in the repository config file.
2935 sub git_get_file_or_project_config {
2936         my ($path, $name) = @_;
2937
2938         $git_dir = "$projectroot/$path";
2939         open my $fd, '<', "$git_dir/$name"
2940                 or return git_get_project_config($name);
2941         my $conf = <$fd>;
2942         close $fd;
2943         if (defined $conf) {
2944                 chomp $conf;
2945         }
2946         return $conf;
2947 }
2948
2949 sub git_get_project_description {
2950         my $path = shift;
2951         return git_get_file_or_project_config($path, 'description');
2952 }
2953
2954 sub git_get_project_category {
2955         my $path = shift;
2956         return git_get_file_or_project_config($path, 'category');
2957 }
2958
2959
2960 # supported formats:
2961 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2962 #   - if its contents is a number, use it as tag weight,
2963 #   - otherwise add a tag with weight 1
2964 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2965 #   the same value multiple times increases tag weight
2966 # * `gitweb.ctag' multi-valued repo config variable
2967 sub git_get_project_ctags {
2968         my $project = shift;
2969         my $ctags = {};
2970
2971         $git_dir = "$projectroot/$project";
2972         if (opendir my $dh, "$git_dir/ctags") {
2973                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2974                 foreach my $tagfile (@files) {
2975                         open my $ct, '<', $tagfile
2976                                 or next;
2977                         my $val = <$ct>;
2978                         chomp $val if $val;
2979                         close $ct;
2980
2981                         (my $ctag = $tagfile) =~ s#.*/##;
2982                         if ($val =~ /^\d+$/) {
2983                                 $ctags->{$ctag} = $val;
2984                         } else {
2985                                 $ctags->{$ctag} = 1;
2986                         }
2987                 }
2988                 closedir $dh;
2989
2990         } elsif (open my $fh, '<', "$git_dir/ctags") {
2991                 while (my $line = <$fh>) {
2992                         chomp $line;
2993                         $ctags->{$line}++ if $line;
2994                 }
2995                 close $fh;
2996
2997         } else {
2998                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2999                 foreach my $tag (@$taglist) {
3000                         $ctags->{$tag}++;
3001                 }
3002         }
3003
3004         return $ctags;
3005 }
3006
3007 # return hash, where keys are content tags ('ctags'),
3008 # and values are sum of weights of given tag in every project
3009 sub git_gather_all_ctags {
3010         my $projects = shift;
3011         my $ctags = {};
3012
3013         foreach my $p (@$projects) {
3014                 foreach my $ct (keys %{$p->{'ctags'}}) {
3015                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
3016                 }
3017         }
3018
3019         return $ctags;
3020 }
3021
3022 sub git_populate_project_tagcloud {
3023         my $ctags = shift;
3024
3025         # First, merge different-cased tags; tags vote on casing
3026         my %ctags_lc;
3027         foreach (keys %$ctags) {
3028                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3029                 if (not $ctags_lc{lc $_}->{topcount}
3030                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3031                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3032                         $ctags_lc{lc $_}->{topname} = $_;
3033                 }
3034         }
3035
3036         my $cloud;
3037         my $matched = $input_params{'ctag'};
3038         if (eval { require HTML::TagCloud; 1; }) {
3039                 $cloud = HTML::TagCloud->new;
3040                 foreach my $ctag (sort keys %ctags_lc) {
3041                         # Pad the title with spaces so that the cloud looks
3042                         # less crammed.
3043                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3044                         $title =~ s/ /&nbsp;/g;
3045                         $title =~ s/^/&nbsp;/g;
3046                         $title =~ s/$/&nbsp;/g;
3047                         if (defined $matched && $matched eq $ctag) {
3048                                 $title = qq(<span class="match">$title</span>);
3049                         }
3050                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3051                                     $ctags_lc{$ctag}->{count});
3052                 }
3053         } else {
3054                 $cloud = {};
3055                 foreach my $ctag (keys %ctags_lc) {
3056                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3057                         if (defined $matched && $matched eq $ctag) {
3058                                 $title = qq(<span class="match">$title</span>);
3059                         }
3060                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3061                         $cloud->{$ctag}{ctag} =
3062                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3063                 }
3064         }
3065         return $cloud;
3066 }
3067
3068 sub git_show_project_tagcloud {
3069         my ($cloud, $count) = @_;
3070         if (ref $cloud eq 'HTML::TagCloud') {
3071                 return $cloud->html_and_css($count);
3072         } else {
3073                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3074                 return
3075                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3076                         join (', ', map {
3077                                 $cloud->{$_}->{'ctag'}
3078                         } splice(@tags, 0, $count)) .
3079                         '</div>';
3080         }
3081 }
3082
3083 sub git_get_project_url_list {
3084         my $path = shift;
3085
3086         $git_dir = "$projectroot/$path";
3087         open my $fd, '<', "$git_dir/cloneurl"
3088                 or return wantarray ?
3089                 @{ config_to_multi(git_get_project_config('url')) } :
3090                    config_to_multi(git_get_project_config('url'));
3091         my @git_project_url_list = map { chomp; $_ } <$fd>;
3092         close $fd;
3093
3094         return wantarray ? @git_project_url_list : \@git_project_url_list;
3095 }
3096
3097 sub git_get_projects_list {
3098         my $filter = shift || '';
3099         my $paranoid = shift;
3100         my @list;
3101
3102         if (-d $projects_list) {
3103                 # search in directory
3104                 my $dir = $projects_list;
3105                 # remove the trailing "/"
3106                 $dir =~ s!/+$!!;
3107                 my $pfxlen = length("$dir");
3108                 my $pfxdepth = ($dir =~ tr!/!!);
3109                 # when filtering, search only given subdirectory
3110                 if ($filter && !$paranoid) {
3111                         $dir .= "/$filter";
3112                         $dir =~ s!/+$!!;
3113                 }
3114
3115                 File::Find::find({
3116                         follow_fast => 1, # follow symbolic links
3117                         follow_skip => 2, # ignore duplicates
3118                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3119                         wanted => sub {
3120                                 # global variables
3121                                 our $project_maxdepth;
3122                                 our $projectroot;
3123                                 # skip project-list toplevel, if we get it.
3124                                 return if (m!^[/.]$!);
3125                                 # only directories can be git repositories
3126                                 return unless (-d $_);
3127                                 # need search permission
3128                                 return unless (-x $_);
3129                                 # don't traverse too deep (Find is super slow on os x)
3130                                 # $project_maxdepth excludes depth of $projectroot
3131                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3132                                         $File::Find::prune = 1;
3133                                         return;
3134                                 }
3135
3136                                 my $path = substr($File::Find::name, $pfxlen + 1);
3137                                 # paranoidly only filter here
3138                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3139                                         next;
3140                                 }
3141                                 # we check related file in $projectroot
3142                                 if (check_export_ok("$projectroot/$path")) {
3143                                         push @list, { path => $path };
3144                                         $File::Find::prune = 1;
3145                                 }
3146                         },
3147                 }, "$dir");
3148
3149         } elsif (-f $projects_list) {
3150                 # read from file(url-encoded):
3151                 # 'git%2Fgit.git Linus+Torvalds'
3152                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3153                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3154                 open my $fd, '<', $projects_list or return;
3155         PROJECT:
3156                 while (my $line = <$fd>) {
3157                         chomp $line;
3158                         my ($path, $owner) = split ' ', $line;
3159                         $path = unescape($path);
3160                         $owner = unescape($owner);
3161                         if (!defined $path) {
3162                                 next;
3163                         }
3164                         # if $filter is rpovided, check if $path begins with $filter
3165                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3166                                 next;
3167                         }
3168                         if (check_export_ok("$projectroot/$path")) {
3169                                 my $pr = {
3170                                         path => $path
3171                                 };
3172                                 if ($owner) {
3173                                         $pr->{'owner'} = to_utf8($owner);
3174                                 }
3175                                 push @list, $pr;
3176                         }
3177                 }
3178                 close $fd;
3179         }
3180         return @list;
3181 }
3182
3183 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3184 # as side effects it sets 'forks' field to list of forks for forked projects
3185 sub filter_forks_from_projects_list {
3186         my $projects = shift;
3187
3188         my %trie; # prefix tree of directories (path components)
3189         # generate trie out of those directories that might contain forks
3190         foreach my $pr (@$projects) {
3191                 my $path = $pr->{'path'};
3192                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3193                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3194                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3195                 next unless (-d "$projectroot/$path"); # containing directory exists
3196                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3197
3198                 # add to trie
3199                 my @dirs = split('/', $path);
3200                 # walk the trie, until either runs out of components or out of trie
3201                 my $ref = \%trie;
3202                 while (scalar @dirs &&
3203                        exists($ref->{$dirs[0]})) {
3204                         $ref = $ref->{shift @dirs};
3205                 }
3206                 # create rest of trie structure from rest of components
3207                 foreach my $dir (@dirs) {
3208                         $ref = $ref->{$dir} = {};
3209                 }
3210                 # create end marker, store $pr as a data
3211                 $ref->{''} = $pr if (!exists $ref->{''});
3212         }
3213
3214         # filter out forks, by finding shortest prefix match for paths
3215         my @filtered;
3216  PROJECT:
3217         foreach my $pr (@$projects) {
3218                 # trie lookup
3219                 my $ref = \%trie;
3220         DIR:
3221                 foreach my $dir (split('/', $pr->{'path'})) {
3222                         if (exists $ref->{''}) {
3223                                 # found [shortest] prefix, is a fork - skip it
3224                                 push @{$ref->{''}{'forks'}}, $pr;
3225                                 next PROJECT;
3226                         }
3227                         if (!exists $ref->{$dir}) {
3228                                 # not in trie, cannot have prefix, not a fork
3229                                 push @filtered, $pr;
3230                                 next PROJECT;
3231                         }
3232                         # If the dir is there, we just walk one step down the trie.
3233                         $ref = $ref->{$dir};
3234                 }
3235                 # we ran out of trie
3236                 # (shouldn't happen: it's either no match, or end marker)
3237                 push @filtered, $pr;
3238         }
3239
3240         return @filtered;
3241 }
3242
3243 # note: fill_project_list_info must be run first,
3244 # for 'descr_long' and 'ctags' to be filled
3245 sub search_projects_list {
3246         my ($projlist, %opts) = @_;
3247         my $tagfilter  = $opts{'tagfilter'};
3248         my $search_re = $opts{'search_regexp'};
3249
3250         return @$projlist
3251                 unless ($tagfilter || $search_re);
3252
3253         # searching projects require filling to be run before it;
3254         fill_project_list_info($projlist,
3255                                $tagfilter  ? 'ctags' : (),
3256                                $search_re ? ('path', 'descr') : ());
3257         my @projects;
3258  PROJECT:
3259         foreach my $pr (@$projlist) {
3260
3261                 if ($tagfilter) {
3262                         next unless ref($pr->{'ctags'}) eq 'HASH';
3263                         next unless
3264                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3265                 }
3266
3267                 if ($search_re) {
3268                         next unless
3269                                 $pr->{'path'} =~ /$search_re/ ||
3270                                 $pr->{'descr_long'} =~ /$search_re/;
3271                 }
3272
3273                 push @projects, $pr;
3274         }
3275
3276         return @projects;
3277 }
3278
3279 our $gitweb_project_owner = undef;
3280 sub git_get_project_list_from_file {
3281
3282         return if (defined $gitweb_project_owner);
3283
3284         $gitweb_project_owner = {};
3285         # read from file (url-encoded):
3286         # 'git%2Fgit.git Linus+Torvalds'
3287         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3288         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3289         if (-f $projects_list) {
3290                 open(my $fd, '<', $projects_list);
3291                 while (my $line = <$fd>) {
3292                         chomp $line;
3293                         my ($pr, $ow) = split ' ', $line;
3294                         $pr = unescape($pr);
3295                         $ow = unescape($ow);
3296                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3297                 }
3298                 close $fd;
3299         }
3300 }
3301
3302 sub git_get_project_owner {
3303         my $project = shift;
3304         my $owner;
3305
3306         return undef unless $project;
3307         $git_dir = "$projectroot/$project";
3308
3309         if (!defined $gitweb_project_owner) {
3310                 git_get_project_list_from_file();
3311         }
3312
3313         if (exists $gitweb_project_owner->{$project}) {
3314                 $owner = $gitweb_project_owner->{$project};
3315         }
3316         if (!defined $owner){
3317                 $owner = git_get_project_config('owner');
3318         }
3319         if (!defined $owner) {
3320                 $owner = get_file_owner("$git_dir");
3321         }
3322
3323         return $owner;
3324 }
3325
3326 sub git_get_last_activity {
3327         my ($path) = @_;
3328         my $fd;
3329
3330         $git_dir = "$projectroot/$path";
3331         open($fd, "-|", git_cmd(), 'for-each-ref',
3332              '--format=%(committer)',
3333              '--sort=-committerdate',
3334              '--count=1',
3335              map { "refs/$_" } get_branch_refs ()) or return;
3336         my $most_recent = <$fd>;
3337         close $fd or return;
3338         if (defined $most_recent &&
3339             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3340                 my $timestamp = $1;
3341                 my $age = time - $timestamp;
3342                 return ($age, age_string($age));
3343         }
3344         return (undef, undef);
3345 }
3346
3347 # Implementation note: when a single remote is wanted, we cannot use 'git
3348 # remote show -n' because that command always work (assuming it's a remote URL
3349 # if it's not defined), and we cannot use 'git remote show' because that would
3350 # try to make a network roundtrip. So the only way to find if that particular
3351 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3352 # and when we find what we want.
3353 sub git_get_remotes_list {
3354         my $wanted = shift;
3355         my %remotes = ();
3356
3357         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3358         return unless $fd;
3359         while (my $remote = <$fd>) {
3360                 chomp $remote;
3361                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3362                 next if $wanted and not $remote eq $wanted;
3363                 my ($url, $key) = ($1, $2);
3364
3365                 $remotes{$remote} ||= { 'heads' => () };
3366                 $remotes{$remote}{$key} = $url;
3367         }
3368         close $fd or return;
3369         return wantarray ? %remotes : \%remotes;
3370 }
3371
3372 # Takes a hash of remotes as first parameter and fills it by adding the
3373 # available remote heads for each of the indicated remotes.
3374 sub fill_remote_heads {
3375         my $remotes = shift;
3376         my @heads = map { "remotes/$_" } keys %$remotes;
3377         my @remoteheads = git_get_heads_list(undef, @heads);
3378         foreach my $remote (keys %$remotes) {
3379                 $remotes->{$remote}{'heads'} = [ grep {
3380                         $_->{'name'} =~ s!^$remote/!!
3381                         } @remoteheads ];
3382         }
3383 }
3384
3385 sub git_get_references {
3386         my $type = shift || "";
3387         my %refs;
3388         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3389         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3390         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3391                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3392                 or return;
3393
3394         while (my $line = <$fd>) {
3395                 chomp $line;
3396                 if ($line =~ m!^($oid_regex)\srefs/($type.*)$!) {
3397                         if (defined $refs{$1}) {
3398                                 push @{$refs{$1}}, $2;
3399                         } else {
3400                                 $refs{$1} = [ $2 ];
3401                         }
3402                 }
3403         }
3404         close $fd or return;
3405         return \%refs;
3406 }
3407
3408 sub git_get_rev_name_tags {
3409         my $hash = shift || return undef;
3410
3411         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3412                 or return;
3413         my $name_rev = <$fd>;
3414         close $fd;
3415
3416         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3417                 return $1;
3418         } else {
3419                 # catches also '$hash undefined' output
3420                 return undef;
3421         }
3422 }
3423
3424 ## ----------------------------------------------------------------------
3425 ## parse to hash functions
3426
3427 sub parse_date {
3428         my $epoch = shift;
3429         my $tz = shift || "-0000";
3430
3431         my %date;
3432         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3433         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3434         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3435         $date{'hour'} = $hour;
3436         $date{'minute'} = $min;
3437         $date{'mday'} = $mday;
3438         $date{'day'} = $days[$wday];
3439         $date{'month'} = $months[$mon];
3440         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3441                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3442         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3443                              $mday, $months[$mon], $hour ,$min;
3444         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3445                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3446
3447         my ($tz_sign, $tz_hour, $tz_min) =
3448                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3449         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3450         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3451         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3452         $date{'hour_local'} = $hour;
3453         $date{'minute_local'} = $min;
3454         $date{'tz_local'} = $tz;
3455         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3456                                   1900+$year, $mon+1, $mday,
3457                                   $hour, $min, $sec, $tz);
3458         return %date;
3459 }
3460
3461 sub hide_mailaddrs_if_private {
3462         my $line = shift;
3463         return $line unless gitweb_check_feature('email-privacy');
3464         $line =~ s/<[^@>]+@[^>]+>/<redacted>/g;
3465         return $line;
3466 }
3467
3468 sub parse_tag {
3469         my $tag_id = shift;
3470         my %tag;
3471         my @comment;
3472
3473         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3474         $tag{'id'} = $tag_id;
3475         while (my $line = <$fd>) {
3476                 chomp $line;
3477                 if ($line =~ m/^object ($oid_regex)$/) {
3478                         $tag{'object'} = $1;
3479                 } elsif ($line =~ m/^type (.+)$/) {
3480                         $tag{'type'} = $1;
3481                 } elsif ($line =~ m/^tag (.+)$/) {
3482                         $tag{'name'} = $1;
3483                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3484                         $tag{'author'} = hide_mailaddrs_if_private($1);
3485                         $tag{'author_epoch'} = $2;
3486                         $tag{'author_tz'} = $3;
3487                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3488                                 $tag{'author_name'}  = $1;
3489                                 $tag{'author_email'} = $2;
3490                         } else {
3491                                 $tag{'author_name'} = $tag{'author'};
3492                         }
3493                 } elsif ($line =~ m/--BEGIN/) {
3494                         push @comment, $line;
3495                         last;
3496                 } elsif ($line eq "") {
3497                         last;
3498                 }
3499         }
3500         push @comment, <$fd>;
3501         $tag{'comment'} = \@comment;
3502         close $fd or return;
3503         if (!defined $tag{'name'}) {
3504                 return
3505         };
3506         return %tag
3507 }
3508
3509 sub parse_commit_text {
3510         my ($commit_text, $withparents) = @_;
3511         my @commit_lines = split '\n', $commit_text;
3512         my %co;
3513
3514         pop @commit_lines; # Remove '\0'
3515
3516         if (! @commit_lines) {
3517                 return;
3518         }
3519
3520         my $header = shift @commit_lines;
3521         if ($header !~ m/^$oid_regex/) {
3522                 return;
3523         }
3524         ($co{'id'}, my @parents) = split ' ', $header;
3525         while (my $line = shift @commit_lines) {
3526                 last if $line eq "\n";
3527                 if ($line =~ m/^tree ($oid_regex)$/) {
3528                         $co{'tree'} = $1;
3529                 } elsif ((!defined $withparents) && ($line =~ m/^parent ($oid_regex)$/)) {
3530                         push @parents, $1;
3531                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3532                         $co{'author'} = hide_mailaddrs_if_private(to_utf8($1));
3533                         $co{'author_epoch'} = $2;
3534                         $co{'author_tz'} = $3;
3535                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3536                                 $co{'author_name'}  = $1;
3537                                 $co{'author_email'} = $2;
3538                         } else {
3539                                 $co{'author_name'} = $co{'author'};
3540                         }
3541                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3542                         $co{'committer'} = hide_mailaddrs_if_private(to_utf8($1));
3543                         $co{'committer_epoch'} = $2;
3544                         $co{'committer_tz'} = $3;
3545                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3546                                 $co{'committer_name'}  = $1;
3547                                 $co{'committer_email'} = $2;
3548                         } else {
3549                                 $co{'committer_name'} = $co{'committer'};
3550                         }
3551                 }
3552         }
3553         if (!defined $co{'tree'}) {
3554                 return;
3555         };
3556         $co{'parents'} = \@parents;
3557         $co{'parent'} = $parents[0];
3558
3559         foreach my $title (@commit_lines) {
3560                 $title =~ s/^    //;
3561                 if ($title ne "") {
3562                         $co{'title'} = chop_str($title, 80, 5);
3563                         # remove leading stuff of merges to make the interesting part visible
3564                         if (length($title) > 50) {
3565                                 $title =~ s/^Automatic //;
3566                                 $title =~ s/^merge (of|with) /Merge ... /i;
3567                                 if (length($title) > 50) {
3568                                         $title =~ s/(http|rsync):\/\///;
3569                                 }
3570                                 if (length($title) > 50) {
3571                                         $title =~ s/(master|www|rsync)\.//;
3572                                 }
3573                                 if (length($title) > 50) {
3574                                         $title =~ s/kernel.org:?//;
3575                                 }
3576                                 if (length($title) > 50) {
3577                                         $title =~ s/\/pub\/scm//;
3578                                 }
3579                         }
3580                         $co{'title_short'} = chop_str($title, 50, 5);
3581                         last;
3582                 }
3583         }
3584         if (! defined $co{'title'} || $co{'title'} eq "") {
3585                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3586         }
3587         # remove added spaces, redact e-mail addresses if applicable.
3588         foreach my $line (@commit_lines) {
3589                 $line =~ s/^    //;
3590                 $line = hide_mailaddrs_if_private($line);
3591         }
3592         $co{'comment'} = \@commit_lines;
3593
3594         my $age = time - $co{'committer_epoch'};
3595         $co{'age'} = $age;
3596         $co{'age_string'} = age_string($age);
3597         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3598         if ($age > 60*60*24*7*2) {
3599                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3600                 $co{'age_string_age'} = $co{'age_string'};
3601         } else {
3602                 $co{'age_string_date'} = $co{'age_string'};
3603                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3604         }
3605         return %co;
3606 }
3607
3608 sub parse_commit {
3609         my ($commit_id) = @_;
3610         my %co;
3611
3612         local $/ = "\0";
3613
3614         open my $fd, "-|", git_cmd(), "rev-list",
3615                 "--parents",
3616                 "--header",
3617                 "--max-count=1",
3618                 $commit_id,
3619                 "--",
3620                 or die_error(500, "Open git-rev-list failed");
3621         %co = parse_commit_text(<$fd>, 1);
3622         close $fd;
3623
3624         return %co;
3625 }
3626
3627 sub parse_commits {
3628         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3629         my @cos;
3630
3631         $maxcount ||= 1;
3632         $skip ||= 0;
3633
3634         local $/ = "\0";
3635
3636         open my $fd, "-|", git_cmd(), "rev-list",
3637                 "--header",
3638                 @args,
3639                 ("--max-count=" . $maxcount),
3640                 ("--skip=" . $skip),
3641                 @extra_options,
3642                 $commit_id,
3643                 "--",
3644                 ($filename ? ($filename) : ())
3645                 or die_error(500, "Open git-rev-list failed");
3646         while (my $line = <$fd>) {
3647                 my %co = parse_commit_text($line);
3648                 push @cos, \%co;
3649         }
3650         close $fd;
3651
3652         return wantarray ? @cos : \@cos;
3653 }
3654
3655 # parse line of git-diff-tree "raw" output
3656 sub parse_difftree_raw_line {
3657         my $line = shift;
3658         my %res;
3659
3660         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3661         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3662         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ($oid_regex) ($oid_regex) (.)([0-9]{0,3})\t(.*)$/) {
3663                 $res{'from_mode'} = $1;
3664                 $res{'to_mode'} = $2;
3665                 $res{'from_id'} = $3;
3666                 $res{'to_id'} = $4;
3667                 $res{'status'} = $5;
3668                 $res{'similarity'} = $6;
3669                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3670                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3671                 } else {
3672                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3673                 }
3674         }
3675         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3676         # combined diff (for merge commit)
3677         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:$oid_regex )+)([a-zA-Z]+)\t(.*)$//) {
3678                 $res{'nparents'}  = length($1);
3679                 $res{'from_mode'} = [ split(' ', $2) ];
3680                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3681                 $res{'from_id'} = [ split(' ', $3) ];
3682                 $res{'to_id'} = pop @{$res{'from_id'}};
3683                 $res{'status'} = [ split('', $4) ];
3684                 $res{'to_file'} = unquote($5);
3685         }
3686         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3687         elsif ($line =~ m/^($oid_regex)$/) {
3688                 $res{'commit'} = $1;
3689         }
3690
3691         return wantarray ? %res : \%res;
3692 }
3693
3694 # wrapper: return parsed line of git-diff-tree "raw" output
3695 # (the argument might be raw line, or parsed info)
3696 sub parsed_difftree_line {
3697         my $line_or_ref = shift;
3698
3699         if (ref($line_or_ref) eq "HASH") {
3700                 # pre-parsed (or generated by hand)
3701                 return $line_or_ref;
3702         } else {
3703                 return parse_difftree_raw_line($line_or_ref);
3704         }
3705 }
3706
3707 # parse line of git-ls-tree output
3708 sub parse_ls_tree_line {
3709         my $line = shift;
3710         my %opts = @_;
3711         my %res;
3712
3713         if ($opts{'-l'}) {
3714                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3715                 $line =~ m/^([0-9]+) (.+) ($oid_regex) +(-|[0-9]+)\t(.+)$/s;
3716
3717                 $res{'mode'} = $1;
3718                 $res{'type'} = $2;
3719                 $res{'hash'} = $3;
3720                 $res{'size'} = $4;
3721                 if ($opts{'-z'}) {
3722                         $res{'name'} = $5;
3723                 } else {
3724                         $res{'name'} = unquote($5);
3725                 }
3726         } else {
3727                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3728                 $line =~ m/^([0-9]+) (.+) ($oid_regex)\t(.+)$/s;
3729
3730                 $res{'mode'} = $1;
3731                 $res{'type'} = $2;
3732                 $res{'hash'} = $3;
3733                 if ($opts{'-z'}) {
3734                         $res{'name'} = $4;
3735                 } else {
3736                         $res{'name'} = unquote($4);
3737                 }
3738         }
3739
3740         return wantarray ? %res : \%res;
3741 }
3742
3743 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3744 sub parse_from_to_diffinfo {
3745         my ($diffinfo, $from, $to, @parents) = @_;
3746
3747         if ($diffinfo->{'nparents'}) {
3748                 # combined diff
3749                 $from->{'file'} = [];
3750                 $from->{'href'} = [];
3751                 fill_from_file_info($diffinfo, @parents)
3752                         unless exists $diffinfo->{'from_file'};
3753                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3754                         $from->{'file'}[$i] =
3755                                 defined $diffinfo->{'from_file'}[$i] ?
3756                                         $diffinfo->{'from_file'}[$i] :
3757                                         $diffinfo->{'to_file'};
3758                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3759                                 $from->{'href'}[$i] = href(action=>"blob",
3760                                                            hash_base=>$parents[$i],
3761                                                            hash=>$diffinfo->{'from_id'}[$i],
3762                                                            file_name=>$from->{'file'}[$i]);
3763                         } else {
3764                                 $from->{'href'}[$i] = undef;
3765                         }
3766                 }
3767         } else {
3768                 # ordinary (not combined) diff
3769                 $from->{'file'} = $diffinfo->{'from_file'};
3770                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3771                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3772                                                hash=>$diffinfo->{'from_id'},
3773                                                file_name=>$from->{'file'});
3774                 } else {
3775                         delete $from->{'href'};
3776                 }
3777         }
3778
3779         $to->{'file'} = $diffinfo->{'to_file'};
3780         if (!is_deleted($diffinfo)) { # file exists in result
3781                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3782                                      hash=>$diffinfo->{'to_id'},
3783                                      file_name=>$to->{'file'});
3784         } else {
3785                 delete $to->{'href'};
3786         }
3787 }
3788
3789 ## ......................................................................
3790 ## parse to array of hashes functions
3791
3792 sub git_get_heads_list {
3793         my ($limit, @classes) = @_;
3794         @classes = get_branch_refs() unless @classes;
3795         my @patterns = map { "refs/$_" } @classes;
3796         my @headslist;
3797
3798         open my $fd, '-|', git_cmd(), 'for-each-ref',
3799                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3800                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3801                 @patterns
3802                 or return;
3803         while (my $line = <$fd>) {
3804                 my %ref_item;
3805
3806                 chomp $line;
3807                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3808                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3809                 my ($committer, $epoch, $tz) =
3810                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3811                 $ref_item{'fullname'}  = $name;
3812                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3813                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3814                 $ref_item{'name'} = $name;
3815                 # for refs neither in 'heads' nor 'remotes' we want to
3816                 # show their ref dir
3817                 my $ref_dir = (defined $1) ? $1 : '';
3818                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3819                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3820                 }
3821
3822                 $ref_item{'id'}    = $hash;
3823                 $ref_item{'title'} = $title || '(no commit message)';
3824                 $ref_item{'epoch'} = $epoch;
3825                 if ($epoch) {
3826                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3827                 } else {
3828                         $ref_item{'age'} = "unknown";
3829                 }
3830
3831                 push @headslist, \%ref_item;
3832         }
3833         close $fd;
3834
3835         return wantarray ? @headslist : \@headslist;
3836 }
3837
3838 sub git_get_tags_list {
3839         my $limit = shift;
3840         my @tagslist;
3841
3842         open my $fd, '-|', git_cmd(), 'for-each-ref',
3843                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3844                 '--format=%(objectname) %(objecttype) %(refname) '.
3845                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3846                 'refs/tags'
3847                 or return;
3848         while (my $line = <$fd>) {
3849                 my %ref_item;
3850
3851                 chomp $line;
3852                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3853                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3854                 my ($creator, $epoch, $tz) =
3855                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3856                 $ref_item{'fullname'} = $name;
3857                 $name =~ s!^refs/tags/!!;
3858
3859                 $ref_item{'type'} = $type;
3860                 $ref_item{'id'} = $id;
3861                 $ref_item{'name'} = $name;
3862                 if ($type eq "tag") {
3863                         $ref_item{'subject'} = $title;
3864                         $ref_item{'reftype'} = $reftype;
3865                         $ref_item{'refid'}   = $refid;
3866                 } else {
3867                         $ref_item{'reftype'} = $type;
3868                         $ref_item{'refid'}   = $id;
3869                 }
3870
3871                 if ($type eq "tag" || $type eq "commit") {
3872                         $ref_item{'epoch'} = $epoch;
3873                         if ($epoch) {
3874                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3875                         } else {
3876                                 $ref_item{'age'} = "unknown";
3877                         }
3878                 }
3879
3880                 push @tagslist, \%ref_item;
3881         }
3882         close $fd;
3883
3884         return wantarray ? @tagslist : \@tagslist;
3885 }
3886
3887 ## ----------------------------------------------------------------------
3888 ## filesystem-related functions
3889
3890 sub get_file_owner {
3891         my $path = shift;
3892
3893         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3894         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3895         if (!defined $gcos) {
3896                 return undef;
3897         }
3898         my $owner = $gcos;
3899         $owner =~ s/[,;].*$//;
3900         return to_utf8($owner);
3901 }
3902
3903 # assume that file exists
3904 sub insert_file {
3905         my $filename = shift;
3906
3907         open my $fd, '<', $filename;
3908         print map { to_utf8($_) } <$fd>;
3909         close $fd;
3910 }
3911
3912 ## ......................................................................
3913 ## mimetype related functions
3914
3915 sub mimetype_guess_file {
3916         my $filename = shift;
3917         my $mimemap = shift;
3918         -r $mimemap or return undef;
3919
3920         my %mimemap;
3921         open(my $mh, '<', $mimemap) or return undef;
3922         while (<$mh>) {
3923                 next if m/^#/; # skip comments
3924                 my ($mimetype, @exts) = split(/\s+/);
3925                 foreach my $ext (@exts) {
3926                         $mimemap{$ext} = $mimetype;
3927                 }
3928         }
3929         close($mh);
3930
3931         $filename =~ /\.([^.]*)$/;
3932         return $mimemap{$1};
3933 }
3934
3935 sub mimetype_guess {
3936         my $filename = shift;
3937         my $mime;
3938         $filename =~ /\./ or return undef;
3939
3940         if ($mimetypes_file) {
3941                 my $file = $mimetypes_file;
3942                 if ($file !~ m!^/!) { # if it is relative path
3943                         # it is relative to project
3944                         $file = "$projectroot/$project/$file";
3945                 }
3946                 $mime = mimetype_guess_file($filename, $file);
3947         }
3948         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3949         return $mime;
3950 }
3951
3952 sub blob_mimetype {
3953         my $fd = shift;
3954         my $filename = shift;
3955
3956         if ($filename) {
3957                 my $mime = mimetype_guess($filename);
3958                 $mime and return $mime;
3959         }
3960
3961         # just in case
3962         return $default_blob_plain_mimetype unless $fd;
3963
3964         if (-T $fd) {
3965                 return 'text/plain';
3966         } elsif (! $filename) {
3967                 return 'application/octet-stream';
3968         } elsif ($filename =~ m/\.png$/i) {
3969                 return 'image/png';
3970         } elsif ($filename =~ m/\.gif$/i) {
3971                 return 'image/gif';
3972         } elsif ($filename =~ m/\.jpe?g$/i) {
3973                 return 'image/jpeg';
3974         } else {
3975                 return 'application/octet-stream';
3976         }
3977 }
3978
3979 sub blob_contenttype {
3980         my ($fd, $file_name, $type) = @_;
3981
3982         $type ||= blob_mimetype($fd, $file_name);
3983         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3984                 $type .= "; charset=$default_text_plain_charset";
3985         }
3986
3987         return $type;
3988 }
3989
3990 # guess file syntax for syntax highlighting; return undef if no highlighting
3991 # the name of syntax can (in the future) depend on syntax highlighter used
3992 sub guess_file_syntax {
3993         my ($highlight, $file_name) = @_;
3994         return undef unless ($highlight && defined $file_name);
3995         my $basename = basename($file_name, '.in');
3996         return $highlight_basename{$basename}
3997                 if exists $highlight_basename{$basename};
3998
3999         $basename =~ /\.([^.]*)$/;
4000         my $ext = $1 or return undef;
4001         return $highlight_ext{$ext}
4002                 if exists $highlight_ext{$ext};
4003
4004         return undef;
4005 }
4006
4007 # run highlighter and return FD of its output,
4008 # or return original FD if no highlighting
4009 sub run_highlighter {
4010         my ($fd, $highlight, $syntax) = @_;
4011         return $fd unless ($highlight);
4012
4013         close $fd;
4014         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
4015         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
4016                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
4017                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
4018                     '--', "-fe=$fallback_encoding")." | ".
4019                   quote_command($highlight_bin).
4020                   " --replace-tabs=8 --fragment $syntax_arg |"
4021                 or die_error(500, "Couldn't open file or run syntax highlighter");
4022         return $fd;
4023 }
4024
4025 ## ======================================================================
4026 ## functions printing HTML: header, footer, error page
4027
4028 sub get_page_title {
4029         my $title = to_utf8($site_name);
4030
4031         unless (defined $project) {
4032                 if (defined $project_filter) {
4033                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4034                 }
4035                 return $title;
4036         }
4037         $title .= " - " . to_utf8($project);
4038
4039         return $title unless (defined $action);
4040         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
4041
4042         return $title unless (defined $file_name);
4043         $title .= " - " . esc_path($file_name);
4044         if ($action eq "tree" && $file_name !~ m|/$|) {
4045                 $title .= "/";
4046         }
4047
4048         return $title;
4049 }
4050
4051 sub get_content_type_html {
4052         # require explicit support from the UA if we are to send the page as
4053         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
4054         # we have to do this because MSIE sometimes globs '*/*', pretending to
4055         # support xhtml+xml but choking when it gets what it asked for.
4056         if (defined $cgi->http('HTTP_ACCEPT') &&
4057             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
4058             $cgi->Accept('application/xhtml+xml') != 0) {
4059                 return 'application/xhtml+xml';
4060         } else {
4061                 return 'text/html';
4062         }
4063 }
4064
4065 sub print_feed_meta {
4066         if (defined $project) {
4067                 my %href_params = get_feed_info();
4068                 if (!exists $href_params{'-title'}) {
4069                         $href_params{'-title'} = 'log';
4070                 }
4071
4072                 foreach my $format (qw(RSS Atom)) {
4073                         my $type = lc($format);
4074                         my %link_attr = (
4075                                 '-rel' => 'alternate',
4076                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4077                                 '-type' => "application/$type+xml"
4078                         );
4079
4080                         $href_params{'extra_options'} = undef;
4081                         $href_params{'action'} = $type;
4082                         $link_attr{'-href'} = esc_attr(href(%href_params));
4083                         print "<link ".
4084                               "rel=\"$link_attr{'-rel'}\" ".
4085                               "title=\"$link_attr{'-title'}\" ".
4086                               "href=\"$link_attr{'-href'}\" ".
4087                               "type=\"$link_attr{'-type'}\" ".
4088                               "/>\n";
4089
4090                         $href_params{'extra_options'} = '--no-merges';
4091                         $link_attr{'-href'} = esc_attr(href(%href_params));
4092                         $link_attr{'-title'} .= ' (no merges)';
4093                         print "<link ".
4094                               "rel=\"$link_attr{'-rel'}\" ".
4095                               "title=\"$link_attr{'-title'}\" ".
4096                               "href=\"$link_attr{'-href'}\" ".
4097                               "type=\"$link_attr{'-type'}\" ".
4098                               "/>\n";
4099                 }
4100
4101         } else {
4102                 printf('<link rel="alternate" title="%s projects list" '.
4103                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4104                        esc_attr($site_name),
4105                        esc_attr(href(project=>undef, action=>"project_index")));
4106                 printf('<link rel="alternate" title="%s projects feeds" '.
4107                        'href="%s" type="text/x-opml" />'."\n",
4108                        esc_attr($site_name),
4109                        esc_attr(href(project=>undef, action=>"opml")));
4110         }
4111 }
4112
4113 sub print_header_links {
4114         my $status = shift;
4115
4116         # print out each stylesheet that exist, providing backwards capability
4117         # for those people who defined $stylesheet in a config file
4118         if (defined $stylesheet) {
4119                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4120         } else {
4121                 foreach my $stylesheet (@stylesheets) {
4122                         next unless $stylesheet;
4123                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4124                 }
4125         }
4126         print_feed_meta()
4127                 if ($status eq '200 OK');
4128         if (defined $favicon) {
4129                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4130         }
4131 }
4132
4133 sub print_nav_breadcrumbs_path {
4134         my $dirprefix = undef;
4135         while (my $part = shift) {
4136                 $dirprefix .= "/" if defined $dirprefix;
4137                 $dirprefix .= $part;
4138                 print $cgi->a({-href => href(project => undef,
4139                                              project_filter => $dirprefix,
4140                                              action => "project_list")},
4141                               esc_html($part)) . " / ";
4142         }
4143 }
4144
4145 sub print_nav_breadcrumbs {
4146         my %opts = @_;
4147
4148         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4149                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4150         }
4151         if (defined $project) {
4152                 my @dirname = split '/', $project;
4153                 my $projectbasename = pop @dirname;
4154                 print_nav_breadcrumbs_path(@dirname);
4155                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4156                 if (defined $action) {
4157                         my $action_print = $action ;
4158                         if (defined $opts{-action_extra}) {
4159                                 $action_print = $cgi->a({-href => href(action=>$action)},
4160                                         $action);
4161                         }
4162                         print " / $action_print";
4163                 }
4164                 if (defined $opts{-action_extra}) {
4165                         print " / $opts{-action_extra}";
4166                 }
4167                 print "\n";
4168         } elsif (defined $project_filter) {
4169                 print_nav_breadcrumbs_path(split '/', $project_filter);
4170         }
4171 }
4172
4173 sub print_search_form {
4174         if (!defined $searchtext) {
4175                 $searchtext = "";
4176         }
4177         my $search_hash;
4178         if (defined $hash_base) {
4179                 $search_hash = $hash_base;
4180         } elsif (defined $hash) {
4181                 $search_hash = $hash;
4182         } else {
4183                 $search_hash = "HEAD";
4184         }
4185         my $action = $my_uri;
4186         my $use_pathinfo = gitweb_check_feature('pathinfo');
4187         if ($use_pathinfo) {
4188                 $action .= "/".esc_url($project);
4189         }
4190         print $cgi->start_form(-method => "get", -action => $action) .
4191               "<div class=\"search\">\n" .
4192               (!$use_pathinfo &&
4193               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4194               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4195               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4196               $cgi->popup_menu(-name => 'st', -default => 'commit',
4197                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4198               " " . $cgi->a({-href => href(action=>"search_help"),
4199                              -title => "search help" }, "?") . " search:\n",
4200               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4201               "<span title=\"Extended regular expression\">" .
4202               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4203                              -checked => $search_use_regexp) .
4204               "</span>" .
4205               "</div>" .
4206               $cgi->end_form() . "\n";
4207 }
4208
4209 sub git_header_html {
4210         my $status = shift || "200 OK";
4211         my $expires = shift;
4212         my %opts = @_;
4213
4214         my $title = get_page_title();
4215         my $content_type = get_content_type_html();
4216         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4217                            -status=> $status, -expires => $expires)
4218                 unless ($opts{'-no_http_header'});
4219         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4220         print <<EOF;
4221 <?xml version="1.0" encoding="utf-8"?>
4222 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4223 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4224 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4225 <!-- git core binaries version $git_version -->
4226 <head>
4227 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4228 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4229 <meta name="robots" content="index, nofollow"/>
4230 <title>$title</title>
4231 EOF
4232         # the stylesheet, favicon etc urls won't work correctly with path_info
4233         # unless we set the appropriate base URL
4234         if ($ENV{'PATH_INFO'}) {
4235                 print "<base href=\"".esc_url($base_url)."\" />\n";
4236         }
4237         print_header_links($status);
4238
4239         if (defined $site_html_head_string) {
4240                 print to_utf8($site_html_head_string);
4241         }
4242
4243         print "</head>\n" .
4244               "<body>\n";
4245
4246         if (defined $site_header && -f $site_header) {
4247                 insert_file($site_header);
4248         }
4249
4250         print "<div class=\"page_header\">\n";
4251         if (defined $logo) {
4252                 print $cgi->a({-href => esc_url($logo_url),
4253                                -title => $logo_label},
4254                               $cgi->img({-src => esc_url($logo),
4255                                          -width => 72, -height => 27,
4256                                          -alt => "git",
4257                                          -class => "logo"}));
4258         }
4259         print_nav_breadcrumbs(%opts);
4260         print "</div>\n";
4261
4262         my $have_search = gitweb_check_feature('search');
4263         if (defined $project && $have_search) {
4264                 print_search_form();
4265         }
4266 }
4267
4268 sub git_footer_html {
4269         my $feed_class = 'rss_logo';
4270
4271         print "<div class=\"page_footer\">\n";
4272         if (defined $project) {
4273                 my $descr = git_get_project_description($project);
4274                 if (defined $descr) {
4275                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4276                 }
4277
4278                 my %href_params = get_feed_info();
4279                 if (!%href_params) {
4280                         $feed_class .= ' generic';
4281                 }
4282                 $href_params{'-title'} ||= 'log';
4283
4284                 foreach my $format (qw(RSS Atom)) {
4285                         $href_params{'action'} = lc($format);
4286                         print $cgi->a({-href => href(%href_params),
4287                                       -title => "$href_params{'-title'} $format feed",
4288                                       -class => $feed_class}, $format)."\n";
4289                 }
4290
4291         } else {
4292                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4293                                              project_filter => $project_filter),
4294                               -class => $feed_class}, "OPML") . " ";
4295                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4296                                              project_filter => $project_filter),
4297                               -class => $feed_class}, "TXT") . "\n";
4298         }
4299         print "</div>\n"; # class="page_footer"
4300
4301         if (defined $t0 && gitweb_check_feature('timed')) {
4302                 print "<div id=\"generating_info\">\n";
4303                 print 'This page took '.
4304                       '<span id="generating_time" class="time_span">'.
4305                       tv_interval($t0, [ gettimeofday() ]).
4306                       ' seconds </span>'.
4307                       ' and '.
4308                       '<span id="generating_cmd">'.
4309                       $number_of_git_cmds.
4310                       '</span> git commands '.
4311                       " to generate.\n";
4312                 print "</div>\n"; # class="page_footer"
4313         }
4314
4315         if (defined $site_footer && -f $site_footer) {
4316                 insert_file($site_footer);
4317         }
4318
4319         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4320         if (defined $action &&
4321             $action eq 'blame_incremental') {
4322                 print qq!<script type="text/javascript">\n!.
4323                       qq!startBlame("!. esc_attr(href(action=>"blame_data", -replay=>1)) .qq!",\n!.
4324                       qq!           "!. esc_attr(href()) .qq!");\n!.
4325                       qq!</script>\n!;
4326         } else {
4327                 my ($jstimezone, $tz_cookie, $datetime_class) =
4328                         gitweb_get_feature('javascript-timezone');
4329
4330                 print qq!<script type="text/javascript">\n!.
4331                       qq!window.onload = function () {\n!;
4332                 if (gitweb_check_feature('javascript-actions')) {
4333                         print qq!       fixLinks();\n!;
4334                 }
4335                 if ($jstimezone && $tz_cookie && $datetime_class) {
4336                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4337                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4338                 }
4339                 print qq!};\n!.
4340                       qq!</script>\n!;
4341         }
4342
4343         print "</body>\n" .
4344               "</html>";
4345 }
4346
4347 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4348 # Example: die_error(404, 'Hash not found')
4349 # By convention, use the following status codes (as defined in RFC 2616):
4350 # 400: Invalid or missing CGI parameters, or
4351 #      requested object exists but has wrong type.
4352 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4353 #      this server or project.
4354 # 404: Requested object/revision/project doesn't exist.
4355 # 500: The server isn't configured properly, or
4356 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4357 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4358 # 503: The server is currently unavailable (because it is overloaded,
4359 #      or down for maintenance).  Generally, this is a temporary state.
4360 sub die_error {
4361         my $status = shift || 500;
4362         my $error = esc_html(shift) || "Internal Server Error";
4363         my $extra = shift;
4364         my %opts = @_;
4365
4366         my %http_responses = (
4367                 400 => '400 Bad Request',
4368                 403 => '403 Forbidden',
4369                 404 => '404 Not Found',
4370                 500 => '500 Internal Server Error',
4371                 503 => '503 Service Unavailable',
4372         );
4373         git_header_html($http_responses{$status}, undef, %opts);
4374         print <<EOF;
4375 <div class="page_body">
4376 <br /><br />
4377 $status - $error
4378 <br />
4379 EOF
4380         if (defined $extra) {
4381                 print "<hr />\n" .
4382                       "$extra\n";
4383         }
4384         print "</div>\n";
4385
4386         git_footer_html();
4387         goto DONE_GITWEB
4388                 unless ($opts{'-error_handler'});
4389 }
4390
4391 ## ----------------------------------------------------------------------
4392 ## functions printing or outputting HTML: navigation
4393
4394 sub git_print_page_nav {
4395         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4396         $extra = '' if !defined $extra; # pager or formats
4397
4398         my @navs = qw(summary shortlog log commit commitdiff tree);
4399         if ($suppress) {
4400                 @navs = grep { $_ ne $suppress } @navs;
4401         }
4402
4403         my %arg = map { $_ => {action=>$_} } @navs;
4404         if (defined $head) {
4405                 for (qw(commit commitdiff)) {
4406                         $arg{$_}{'hash'} = $head;
4407                 }
4408                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4409                         for (qw(shortlog log)) {
4410                                 $arg{$_}{'hash'} = $head;
4411                         }
4412                 }
4413         }
4414
4415         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4416         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4417
4418         my @actions = gitweb_get_feature('actions');
4419         my %repl = (
4420                 '%' => '%',
4421                 'n' => $project,         # project name
4422                 'f' => $git_dir,         # project path within filesystem
4423                 'h' => $treehead || '',  # current hash ('h' parameter)
4424                 'b' => $treebase || '',  # hash base ('hb' parameter)
4425         );
4426         while (@actions) {
4427                 my ($label, $link, $pos) = splice(@actions,0,3);
4428                 # insert
4429                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4430                 # munch munch
4431                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4432                 $arg{$label}{'_href'} = $link;
4433         }
4434
4435         print "<div class=\"page_nav\">\n" .
4436                 (join " | ",
4437                  map { $_ eq $current ?
4438                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4439                  } @navs);
4440         print "<br/>\n$extra<br/>\n" .
4441               "</div>\n";
4442 }
4443
4444 # returns a submenu for the navigation of the refs views (tags, heads,
4445 # remotes) with the current view disabled and the remotes view only
4446 # available if the feature is enabled
4447 sub format_ref_views {
4448         my ($current) = @_;
4449         my @ref_views = qw{tags heads};
4450         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4451         return join " | ", map {
4452                 $_ eq $current ? $_ :
4453                 $cgi->a({-href => href(action=>$_)}, $_)
4454         } @ref_views
4455 }
4456
4457 sub format_paging_nav {
4458         my ($action, $page, $has_next_link) = @_;
4459         my $paging_nav;
4460
4461
4462         if ($page > 0) {
4463                 $paging_nav .=
4464                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4465                         " &sdot; " .
4466                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4467                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4468         } else {
4469                 $paging_nav .= "first &sdot; prev";
4470         }
4471
4472         if ($has_next_link) {
4473                 $paging_nav .= " &sdot; " .
4474                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4475                                  -accesskey => "n", -title => "Alt-n"}, "next");
4476         } else {
4477                 $paging_nav .= " &sdot; next";
4478         }
4479
4480         return $paging_nav;
4481 }
4482
4483 ## ......................................................................
4484 ## functions printing or outputting HTML: div
4485
4486 sub git_print_header_div {
4487         my ($action, $title, $hash, $hash_base) = @_;
4488         my %args = ();
4489
4490         $args{'action'} = $action;
4491         $args{'hash'} = $hash if $hash;
4492         $args{'hash_base'} = $hash_base if $hash_base;
4493
4494         print "<div class=\"header\">\n" .
4495               $cgi->a({-href => href(%args), -class => "title"},
4496               $title ? $title : $action) .
4497               "\n</div>\n";
4498 }
4499
4500 sub format_repo_url {
4501         my ($name, $url) = @_;
4502         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4503 }
4504
4505 # Group output by placing it in a DIV element and adding a header.
4506 # Options for start_div() can be provided by passing a hash reference as the
4507 # first parameter to the function.
4508 # Options to git_print_header_div() can be provided by passing an array
4509 # reference. This must follow the options to start_div if they are present.
4510 # The content can be a scalar, which is output as-is, a scalar reference, which
4511 # is output after html escaping, an IO handle passed either as *handle or
4512 # *handle{IO}, or a function reference. In the latter case all following
4513 # parameters will be taken as argument to the content function call.
4514 sub git_print_section {
4515         my ($div_args, $header_args, $content);
4516         my $arg = shift;
4517         if (ref($arg) eq 'HASH') {
4518                 $div_args = $arg;
4519                 $arg = shift;
4520         }
4521         if (ref($arg) eq 'ARRAY') {
4522                 $header_args = $arg;
4523                 $arg = shift;
4524         }
4525         $content = $arg;
4526
4527         print $cgi->start_div($div_args);
4528         git_print_header_div(@$header_args);
4529
4530         if (ref($content) eq 'CODE') {
4531                 $content->(@_);
4532         } elsif (ref($content) eq 'SCALAR') {
4533                 print esc_html($$content);
4534         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4535                 print <$content>;
4536         } elsif (!ref($content) && defined($content)) {
4537                 print $content;
4538         }
4539
4540         print $cgi->end_div;
4541 }
4542
4543 sub format_timestamp_html {
4544         my $date = shift;
4545         my $strtime = $date->{'rfc2822'};
4546
4547         my (undef, undef, $datetime_class) =
4548                 gitweb_get_feature('javascript-timezone');
4549         if ($datetime_class) {
4550                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4551         }
4552
4553         my $localtime_format = '(%02d:%02d %s)';
4554         if ($date->{'hour_local'} < 6) {
4555                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4556         }
4557         $strtime .= ' ' .
4558                     sprintf($localtime_format,
4559                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4560
4561         return $strtime;
4562 }
4563
4564 # Outputs the author name and date in long form
4565 sub git_print_authorship {
4566         my $co = shift;
4567         my %opts = @_;
4568         my $tag = $opts{-tag} || 'div';
4569         my $author = $co->{'author_name'};
4570
4571         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4572         print "<$tag class=\"author_date\">" .
4573               format_search_author($author, "author", esc_html($author)) .
4574               " [".format_timestamp_html(\%ad)."]".
4575               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4576               "</$tag>\n";
4577 }
4578
4579 # Outputs table rows containing the full author or committer information,
4580 # in the format expected for 'commit' view (& similar).
4581 # Parameters are a commit hash reference, followed by the list of people
4582 # to output information for. If the list is empty it defaults to both
4583 # author and committer.
4584 sub git_print_authorship_rows {
4585         my $co = shift;
4586         # too bad we can't use @people = @_ || ('author', 'committer')
4587         my @people = @_;
4588         @people = ('author', 'committer') unless @people;
4589         foreach my $who (@people) {
4590                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4591                 print "<tr><td>$who</td><td>" .
4592                       format_search_author($co->{"${who}_name"}, $who,
4593                                            esc_html($co->{"${who}_name"})) . " " .
4594                       format_search_author($co->{"${who}_email"}, $who,
4595                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4596                       "</td><td rowspan=\"2\">" .
4597                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4598                       "</td></tr>\n" .
4599                       "<tr>" .
4600                       "<td></td><td>" .
4601                       format_timestamp_html(\%wd) .
4602                       "</td>" .
4603                       "</tr>\n";
4604         }
4605 }
4606
4607 sub git_print_page_path {
4608         my $name = shift;
4609         my $type = shift;
4610         my $hb = shift;
4611
4612
4613         print "<div class=\"page_path\">";
4614         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4615                       -title => 'tree root'}, to_utf8("[$project]"));
4616         print " / ";
4617         if (defined $name) {
4618                 my @dirname = split '/', $name;
4619                 my $basename = pop @dirname;
4620                 my $fullname = '';
4621
4622                 foreach my $dir (@dirname) {
4623                         $fullname .= ($fullname ? '/' : '') . $dir;
4624                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4625                                                      hash_base=>$hb),
4626                                       -title => $fullname}, esc_path($dir));
4627                         print " / ";
4628                 }
4629                 if (defined $type && $type eq 'blob') {
4630                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4631                                                      hash_base=>$hb),
4632                                       -title => $name}, esc_path($basename));
4633                 } elsif (defined $type && $type eq 'tree') {
4634                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4635                                                      hash_base=>$hb),
4636                                       -title => $name}, esc_path($basename));
4637                         print " / ";
4638                 } else {
4639                         print esc_path($basename);
4640                 }
4641         }
4642         print "<br/></div>\n";
4643 }
4644
4645 sub git_print_log {
4646         my $log = shift;
4647         my %opts = @_;
4648
4649         if ($opts{'-remove_title'}) {
4650                 # remove title, i.e. first line of log
4651                 shift @$log;
4652         }
4653         # remove leading empty lines
4654         while (defined $log->[0] && $log->[0] eq "") {
4655                 shift @$log;
4656         }
4657
4658         # print log
4659         my $skip_blank_line = 0;
4660         foreach my $line (@$log) {
4661                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-([Bb]y|[Tt]o)|C[Cc]|(Clos|Fix)es): /) {
4662                         if (! $opts{'-remove_signoff'}) {
4663                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4664                                 $skip_blank_line = 1;
4665                         }
4666                         next;
4667                 }
4668
4669                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4670                         if (! $opts{'-remove_signoff'}) {
4671                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4672                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4673                                         "</span><br/>\n";
4674                                 $skip_blank_line = 1;
4675                         }
4676                         next;
4677                 }
4678
4679                 # print only one empty line
4680                 # do not print empty line after signoff
4681                 if ($line eq "") {
4682                         next if ($skip_blank_line);
4683                         $skip_blank_line = 1;
4684                 } else {
4685                         $skip_blank_line = 0;
4686                 }
4687
4688                 print format_log_line_html($line) . "<br/>\n";
4689         }
4690
4691         if ($opts{'-final_empty_line'}) {
4692                 # end with single empty line
4693                 print "<br/>\n" unless $skip_blank_line;
4694         }
4695 }
4696
4697 # return link target (what link points to)
4698 sub git_get_link_target {
4699         my $hash = shift;
4700         my $link_target;
4701
4702         # read link
4703         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4704                 or return;
4705         {
4706                 local $/ = undef;
4707                 $link_target = <$fd>;
4708         }
4709         close $fd
4710                 or return;
4711
4712         return $link_target;
4713 }
4714
4715 # given link target, and the directory (basedir) the link is in,
4716 # return target of link relative to top directory (top tree);
4717 # return undef if it is not possible (including absolute links).
4718 sub normalize_link_target {
4719         my ($link_target, $basedir) = @_;
4720
4721         # absolute symlinks (beginning with '/') cannot be normalized
4722         return if (substr($link_target, 0, 1) eq '/');
4723
4724         # normalize link target to path from top (root) tree (dir)
4725         my $path;
4726         if ($basedir) {
4727                 $path = $basedir . '/' . $link_target;
4728         } else {
4729                 # we are in top (root) tree (dir)
4730                 $path = $link_target;
4731         }
4732
4733         # remove //, /./, and /../
4734         my @path_parts;
4735         foreach my $part (split('/', $path)) {
4736                 # discard '.' and ''
4737                 next if (!$part || $part eq '.');
4738                 # handle '..'
4739                 if ($part eq '..') {
4740                         if (@path_parts) {
4741                                 pop @path_parts;
4742                         } else {
4743                                 # link leads outside repository (outside top dir)
4744                                 return;
4745                         }
4746                 } else {
4747                         push @path_parts, $part;
4748                 }
4749         }
4750         $path = join('/', @path_parts);
4751
4752         return $path;
4753 }
4754
4755 # print tree entry (row of git_tree), but without encompassing <tr> element
4756 sub git_print_tree_entry {
4757         my ($t, $basedir, $hash_base, $have_blame) = @_;
4758
4759         my %base_key = ();
4760         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4761
4762         # The format of a table row is: mode list link.  Where mode is
4763         # the mode of the entry, list is the name of the entry, an href,
4764         # and link is the action links of the entry.
4765
4766         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4767         if (exists $t->{'size'}) {
4768                 print "<td class=\"size\">$t->{'size'}</td>\n";
4769         }
4770         if ($t->{'type'} eq "blob") {
4771                 print "<td class=\"list\">" .
4772                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4773                                                file_name=>"$basedir$t->{'name'}", %base_key),
4774                                 -class => "list"}, esc_path($t->{'name'}));
4775                 if (S_ISLNK(oct $t->{'mode'})) {
4776                         my $link_target = git_get_link_target($t->{'hash'});
4777                         if ($link_target) {
4778                                 my $norm_target = normalize_link_target($link_target, $basedir);
4779                                 if (defined $norm_target) {
4780                                         print " -> " .
4781                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4782                                                                      file_name=>$norm_target),
4783                                                        -title => $norm_target}, esc_path($link_target));
4784                                 } else {
4785                                         print " -> " . esc_path($link_target);
4786                                 }
4787                         }
4788                 }
4789                 print "</td>\n";
4790                 print "<td class=\"link\">";
4791                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4792                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4793                               "blob");
4794                 if ($have_blame) {
4795                         print " | " .
4796                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4797                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4798                                       "blame");
4799                 }
4800                 if (defined $hash_base) {
4801                         print " | " .
4802                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4803                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4804                                       "history");
4805                 }
4806                 print " | " .
4807                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4808                                                file_name=>"$basedir$t->{'name'}")},
4809                                 "raw");
4810                 print "</td>\n";
4811
4812         } elsif ($t->{'type'} eq "tree") {
4813                 print "<td class=\"list\">";
4814                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4815                                              file_name=>"$basedir$t->{'name'}",
4816                                              %base_key)},
4817                               esc_path($t->{'name'}));
4818                 print "</td>\n";
4819                 print "<td class=\"link\">";
4820                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4821                                              file_name=>"$basedir$t->{'name'}",
4822                                              %base_key)},
4823                               "tree");
4824                 if (defined $hash_base) {
4825                         print " | " .
4826                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4827                                                      file_name=>"$basedir$t->{'name'}")},
4828                                       "history");
4829                 }
4830                 print "</td>\n";
4831         } else {
4832                 # unknown object: we can only present history for it
4833                 # (this includes 'commit' object, i.e. submodule support)
4834                 print "<td class=\"list\">" .
4835                       esc_path($t->{'name'}) .
4836                       "</td>\n";
4837                 print "<td class=\"link\">";
4838                 if (defined $hash_base) {
4839                         print $cgi->a({-href => href(action=>"history",
4840                                                      hash_base=>$hash_base,
4841                                                      file_name=>"$basedir$t->{'name'}")},
4842                                       "history");
4843                 }
4844                 print "</td>\n";
4845         }
4846 }
4847
4848 ## ......................................................................
4849 ## functions printing large fragments of HTML
4850
4851 # get pre-image filenames for merge (combined) diff
4852 sub fill_from_file_info {
4853         my ($diff, @parents) = @_;
4854
4855         $diff->{'from_file'} = [ ];
4856         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4857         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4858                 if ($diff->{'status'}[$i] eq 'R' ||
4859                     $diff->{'status'}[$i] eq 'C') {
4860                         $diff->{'from_file'}[$i] =
4861                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4862                 }
4863         }
4864
4865         return $diff;
4866 }
4867
4868 # is current raw difftree line of file deletion
4869 sub is_deleted {
4870         my $diffinfo = shift;
4871
4872         return $diffinfo->{'to_id'} eq ('0' x 40) || $diffinfo->{'to_id'} eq ('0' x 64);
4873 }
4874
4875 # does patch correspond to [previous] difftree raw line
4876 # $diffinfo  - hashref of parsed raw diff format
4877 # $patchinfo - hashref of parsed patch diff format
4878 #              (the same keys as in $diffinfo)
4879 sub is_patch_split {
4880         my ($diffinfo, $patchinfo) = @_;
4881
4882         return defined $diffinfo && defined $patchinfo
4883                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4884 }
4885
4886
4887 sub git_difftree_body {
4888         my ($difftree, $hash, @parents) = @_;
4889         my ($parent) = $parents[0];
4890         my $have_blame = gitweb_check_feature('blame');
4891         print "<div class=\"list_head\">\n";
4892         if ($#{$difftree} > 10) {
4893                 print(($#{$difftree} + 1) . " files changed:\n");
4894         }
4895         print "</div>\n";
4896
4897         print "<table class=\"" .
4898               (@parents > 1 ? "combined " : "") .
4899               "diff_tree\">\n";
4900
4901         # header only for combined diff in 'commitdiff' view
4902         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4903         if ($has_header) {
4904                 # table header
4905                 print "<thead><tr>\n" .
4906                        "<th></th><th></th>\n"; # filename, patchN link
4907                 for (my $i = 0; $i < @parents; $i++) {
4908                         my $par = $parents[$i];
4909                         print "<th>" .
4910                               $cgi->a({-href => href(action=>"commitdiff",
4911                                                      hash=>$hash, hash_parent=>$par),
4912                                        -title => 'commitdiff to parent number ' .
4913                                                   ($i+1) . ': ' . substr($par,0,7)},
4914                                       $i+1) .
4915                               "&nbsp;</th>\n";
4916                 }
4917                 print "</tr></thead>\n<tbody>\n";
4918         }
4919
4920         my $alternate = 1;
4921         my $patchno = 0;
4922         foreach my $line (@{$difftree}) {
4923                 my $diff = parsed_difftree_line($line);
4924
4925                 if ($alternate) {
4926                         print "<tr class=\"dark\">\n";
4927                 } else {
4928                         print "<tr class=\"light\">\n";
4929                 }
4930                 $alternate ^= 1;
4931
4932                 if (exists $diff->{'nparents'}) { # combined diff
4933
4934                         fill_from_file_info($diff, @parents)
4935                                 unless exists $diff->{'from_file'};
4936
4937                         if (!is_deleted($diff)) {
4938                                 # file exists in the result (child) commit
4939                                 print "<td>" .
4940                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4941                                                              file_name=>$diff->{'to_file'},
4942                                                              hash_base=>$hash),
4943                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4944                                       "</td>\n";
4945                         } else {
4946                                 print "<td>" .
4947                                       esc_path($diff->{'to_file'}) .
4948                                       "</td>\n";
4949                         }
4950
4951                         if ($action eq 'commitdiff') {
4952                                 # link to patch
4953                                 $patchno++;
4954                                 print "<td class=\"link\">" .
4955                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4956                                               "patch") .
4957                                       " | " .
4958                                       "</td>\n";
4959                         }
4960
4961                         my $has_history = 0;
4962                         my $not_deleted = 0;
4963                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4964                                 my $hash_parent = $parents[$i];
4965                                 my $from_hash = $diff->{'from_id'}[$i];
4966                                 my $from_path = $diff->{'from_file'}[$i];
4967                                 my $status = $diff->{'status'}[$i];
4968
4969                                 $has_history ||= ($status ne 'A');
4970                                 $not_deleted ||= ($status ne 'D');
4971
4972                                 if ($status eq 'A') {
4973                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4974                                 } elsif ($status eq 'D') {
4975                                         print "<td class=\"link\">" .
4976                                               $cgi->a({-href => href(action=>"blob",
4977                                                                      hash_base=>$hash,
4978                                                                      hash=>$from_hash,
4979                                                                      file_name=>$from_path)},
4980                                                       "blob" . ($i+1)) .
4981                                               " | </td>\n";
4982                                 } else {
4983                                         if ($diff->{'to_id'} eq $from_hash) {
4984                                                 print "<td class=\"link nochange\">";
4985                                         } else {
4986                                                 print "<td class=\"link\">";
4987                                         }
4988                                         print $cgi->a({-href => href(action=>"blobdiff",
4989                                                                      hash=>$diff->{'to_id'},
4990                                                                      hash_parent=>$from_hash,
4991                                                                      hash_base=>$hash,
4992                                                                      hash_parent_base=>$hash_parent,
4993                                                                      file_name=>$diff->{'to_file'},
4994                                                                      file_parent=>$from_path)},
4995                                                       "diff" . ($i+1)) .
4996                                               " | </td>\n";
4997                                 }
4998                         }
4999
5000                         print "<td class=\"link\">";
5001                         if ($not_deleted) {
5002                                 print $cgi->a({-href => href(action=>"blob",
5003                                                              hash=>$diff->{'to_id'},
5004                                                              file_name=>$diff->{'to_file'},
5005                                                              hash_base=>$hash)},
5006                                               "blob");
5007                                 print " | " if ($has_history);
5008                         }
5009                         if ($has_history) {
5010                                 print $cgi->a({-href => href(action=>"history",
5011                                                              file_name=>$diff->{'to_file'},
5012                                                              hash_base=>$hash)},
5013                                               "history");
5014                         }
5015                         print "</td>\n";
5016
5017                         print "</tr>\n";
5018                         next; # instead of 'else' clause, to avoid extra indent
5019                 }
5020                 # else ordinary diff
5021
5022                 my ($to_mode_oct, $to_mode_str, $to_file_type);
5023                 my ($from_mode_oct, $from_mode_str, $from_file_type);
5024                 if ($diff->{'to_mode'} ne ('0' x 6)) {
5025                         $to_mode_oct = oct $diff->{'to_mode'};
5026                         if (S_ISREG($to_mode_oct)) { # only for regular file
5027                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
5028                         }
5029                         $to_file_type = file_type($diff->{'to_mode'});
5030                 }
5031                 if ($diff->{'from_mode'} ne ('0' x 6)) {
5032                         $from_mode_oct = oct $diff->{'from_mode'};
5033                         if (S_ISREG($from_mode_oct)) { # only for regular file
5034                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
5035                         }
5036                         $from_file_type = file_type($diff->{'from_mode'});
5037                 }
5038
5039                 if ($diff->{'status'} eq "A") { # created
5040                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
5041                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
5042                         $mode_chng   .= "]</span>";
5043                         print "<td>";
5044                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5045                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5046                                       -class => "list"}, esc_path($diff->{'file'}));
5047                         print "</td>\n";
5048                         print "<td>$mode_chng</td>\n";
5049                         print "<td class=\"link\">";
5050                         if ($action eq 'commitdiff') {
5051                                 # link to patch
5052                                 $patchno++;
5053                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5054                                               "patch") .
5055                                       " | ";
5056                         }
5057                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5058                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5059                                       "blob");
5060                         print "</td>\n";
5061
5062                 } elsif ($diff->{'status'} eq "D") { # deleted
5063                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5064                         print "<td>";
5065                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5066                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5067                                        -class => "list"}, esc_path($diff->{'file'}));
5068                         print "</td>\n";
5069                         print "<td>$mode_chng</td>\n";
5070                         print "<td class=\"link\">";
5071                         if ($action eq 'commitdiff') {
5072                                 # link to patch
5073                                 $patchno++;
5074                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5075                                               "patch") .
5076                                       " | ";
5077                         }
5078                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5079                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5080                                       "blob") . " | ";
5081                         if ($have_blame) {
5082                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5083                                                              file_name=>$diff->{'file'})},
5084                                               "blame") . " | ";
5085                         }
5086                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5087                                                      file_name=>$diff->{'file'})},
5088                                       "history");
5089                         print "</td>\n";
5090
5091                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5092                         my $mode_chnge = "";
5093                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5094                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5095                                 if ($from_file_type ne $to_file_type) {
5096                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5097                                 }
5098                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5099                                         if ($from_mode_str && $to_mode_str) {
5100                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5101                                         } elsif ($to_mode_str) {
5102                                                 $mode_chnge .= " mode: $to_mode_str";
5103                                         }
5104                                 }
5105                                 $mode_chnge .= "]</span>\n";
5106                         }
5107                         print "<td>";
5108                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5109                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5110                                       -class => "list"}, esc_path($diff->{'file'}));
5111                         print "</td>\n";
5112                         print "<td>$mode_chnge</td>\n";
5113                         print "<td class=\"link\">";
5114                         if ($action eq 'commitdiff') {
5115                                 # link to patch
5116                                 $patchno++;
5117                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5118                                               "patch") .
5119                                       " | ";
5120                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5121                                 # "commit" view and modified file (not onlu mode changed)
5122                                 print $cgi->a({-href => href(action=>"blobdiff",
5123                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5124                                                              hash_base=>$hash, hash_parent_base=>$parent,
5125                                                              file_name=>$diff->{'file'})},
5126                                               "diff") .
5127                                       " | ";
5128                         }
5129                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5130                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5131                                        "blob") . " | ";
5132                         if ($have_blame) {
5133                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5134                                                              file_name=>$diff->{'file'})},
5135                                               "blame") . " | ";
5136                         }
5137                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5138                                                      file_name=>$diff->{'file'})},
5139                                       "history");
5140                         print "</td>\n";
5141
5142                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5143                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5144                         my $nstatus = $status_name{$diff->{'status'}};
5145                         my $mode_chng = "";
5146                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5147                                 # mode also for directories, so we cannot use $to_mode_str
5148                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5149                         }
5150                         print "<td>" .
5151                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5152                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5153                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5154                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5155                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5156                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5157                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5158                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5159                               "<td class=\"link\">";
5160                         if ($action eq 'commitdiff') {
5161                                 # link to patch
5162                                 $patchno++;
5163                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5164                                               "patch") .
5165                                       " | ";
5166                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5167                                 # "commit" view and modified file (not only pure rename or copy)
5168                                 print $cgi->a({-href => href(action=>"blobdiff",
5169                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5170                                                              hash_base=>$hash, hash_parent_base=>$parent,
5171                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5172                                               "diff") .
5173                                       " | ";
5174                         }
5175                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5176                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5177                                       "blob") . " | ";
5178                         if ($have_blame) {
5179                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5180                                                              file_name=>$diff->{'to_file'})},
5181                                               "blame") . " | ";
5182                         }
5183                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5184                                                     file_name=>$diff->{'to_file'})},
5185                                       "history");
5186                         print "</td>\n";
5187
5188                 } # we should not encounter Unmerged (U) or Unknown (X) status
5189                 print "</tr>\n";
5190         }
5191         print "</tbody>" if $has_header;
5192         print "</table>\n";
5193 }
5194
5195 # Print context lines and then rem/add lines in a side-by-side manner.
5196 sub print_sidebyside_diff_lines {
5197         my ($ctx, $rem, $add) = @_;
5198
5199         # print context block before add/rem block
5200         if (@$ctx) {
5201                 print join '',
5202                         '<div class="chunk_block ctx">',
5203                                 '<div class="old">',
5204                                 @$ctx,
5205                                 '</div>',
5206                                 '<div class="new">',
5207                                 @$ctx,
5208                                 '</div>',
5209                         '</div>';
5210         }
5211
5212         if (!@$add) {
5213                 # pure removal
5214                 print join '',
5215                         '<div class="chunk_block rem">',
5216                                 '<div class="old">',
5217                                 @$rem,
5218                                 '</div>',
5219                         '</div>';
5220         } elsif (!@$rem) {
5221                 # pure addition
5222                 print join '',
5223                         '<div class="chunk_block add">',
5224                                 '<div class="new">',
5225                                 @$add,
5226                                 '</div>',
5227                         '</div>';
5228         } else {
5229                 print join '',
5230                         '<div class="chunk_block chg">',
5231                                 '<div class="old">',
5232                                 @$rem,
5233                                 '</div>',
5234                                 '<div class="new">',
5235                                 @$add,
5236                                 '</div>',
5237                         '</div>';
5238         }
5239 }
5240
5241 # Print context lines and then rem/add lines in inline manner.
5242 sub print_inline_diff_lines {
5243         my ($ctx, $rem, $add) = @_;
5244
5245         print @$ctx, @$rem, @$add;
5246 }
5247
5248 # Format removed and added line, mark changed part and HTML-format them.
5249 # Implementation is based on contrib/diff-highlight
5250 sub format_rem_add_lines_pair {
5251         my ($rem, $add, $num_parents) = @_;
5252
5253         # We need to untabify lines before split()'ing them;
5254         # otherwise offsets would be invalid.
5255         chomp $rem;
5256         chomp $add;
5257         $rem = untabify($rem);
5258         $add = untabify($add);
5259
5260         my @rem = split(//, $rem);
5261         my @add = split(//, $add);
5262         my ($esc_rem, $esc_add);
5263         # Ignore leading +/- characters for each parent.
5264         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5265         my ($prefix_has_nonspace, $suffix_has_nonspace);
5266
5267         my $shorter = (@rem < @add) ? @rem : @add;
5268         while ($prefix_len < $shorter) {
5269                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5270
5271                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5272                 $prefix_len++;
5273         }
5274
5275         while ($prefix_len + $suffix_len < $shorter) {
5276                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5277
5278                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5279                 $suffix_len++;
5280         }
5281
5282         # Mark lines that are different from each other, but have some common
5283         # part that isn't whitespace.  If lines are completely different, don't
5284         # mark them because that would make output unreadable, especially if
5285         # diff consists of multiple lines.
5286         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5287                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5288                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5289                 $esc_add = esc_html_hl_regions($add, 'marked',
5290                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5291         } else {
5292                 $esc_rem = esc_html($rem, -nbsp=>1);
5293                 $esc_add = esc_html($add, -nbsp=>1);
5294         }
5295
5296         return format_diff_line(\$esc_rem, 'rem'),
5297                format_diff_line(\$esc_add, 'add');
5298 }
5299
5300 # HTML-format diff context, removed and added lines.
5301 sub format_ctx_rem_add_lines {
5302         my ($ctx, $rem, $add, $num_parents) = @_;
5303         my (@new_ctx, @new_rem, @new_add);
5304         my $can_highlight = 0;
5305         my $is_combined = ($num_parents > 1);
5306
5307         # Highlight if every removed line has a corresponding added line.
5308         if (@$add > 0 && @$add == @$rem) {
5309                 $can_highlight = 1;
5310
5311                 # Highlight lines in combined diff only if the chunk contains
5312                 # diff between the same version, e.g.
5313                 #
5314                 #    - a
5315                 #   -  b
5316                 #    + c
5317                 #   +  d
5318                 #
5319                 # Otherwise the highlighting would be confusing.
5320                 if ($is_combined) {
5321                         for (my $i = 0; $i < @$add; $i++) {
5322                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5323                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5324
5325                                 $prefix_rem =~ s/-/+/g;
5326
5327                                 if ($prefix_rem ne $prefix_add) {
5328                                         $can_highlight = 0;
5329                                         last;
5330                                 }
5331                         }
5332                 }
5333         }
5334
5335         if ($can_highlight) {
5336                 for (my $i = 0; $i < @$add; $i++) {
5337                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5338                                 $rem->[$i], $add->[$i], $num_parents);
5339                         push @new_rem, $line_rem;
5340                         push @new_add, $line_add;
5341                 }
5342         } else {
5343                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5344                 @new_add = map { format_diff_line($_, 'add') } @$add;
5345         }
5346
5347         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5348
5349         return (\@new_ctx, \@new_rem, \@new_add);
5350 }
5351
5352 # Print context lines and then rem/add lines.
5353 sub print_diff_lines {
5354         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5355         my $is_combined = $num_parents > 1;
5356
5357         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5358                 $num_parents);
5359
5360         if ($diff_style eq 'sidebyside' && !$is_combined) {
5361                 print_sidebyside_diff_lines($ctx, $rem, $add);
5362         } else {
5363                 # default 'inline' style and unknown styles
5364                 print_inline_diff_lines($ctx, $rem, $add);
5365         }
5366 }
5367
5368 sub print_diff_chunk {
5369         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5370         my (@ctx, @rem, @add);
5371
5372         # The class of the previous line.
5373         my $prev_class = '';
5374
5375         return unless @chunk;
5376
5377         # incomplete last line might be among removed or added lines,
5378         # or both, or among context lines: find which
5379         for (my $i = 1; $i < @chunk; $i++) {
5380                 if ($chunk[$i][0] eq 'incomplete') {
5381                         $chunk[$i][0] = $chunk[$i-1][0];
5382                 }
5383         }
5384
5385         # guardian
5386         push @chunk, ["", ""];
5387
5388         foreach my $line_info (@chunk) {
5389                 my ($class, $line) = @$line_info;
5390
5391                 # print chunk headers
5392                 if ($class && $class eq 'chunk_header') {
5393                         print format_diff_line($line, $class, $from, $to);
5394                         next;
5395                 }
5396
5397                 ## print from accumulator when have some add/rem lines or end
5398                 # of chunk (flush context lines), or when have add and rem
5399                 # lines and new block is reached (otherwise add/rem lines could
5400                 # be reordered)
5401                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5402                     (@rem && @add && $class ne $prev_class)) {
5403                         print_diff_lines(\@ctx, \@rem, \@add,
5404                                          $diff_style, $num_parents);
5405                         @ctx = @rem = @add = ();
5406                 }
5407
5408                 ## adding lines to accumulator
5409                 # guardian value
5410                 last unless $line;
5411                 # rem, add or change
5412                 if ($class eq 'rem') {
5413                         push @rem, $line;
5414                 } elsif ($class eq 'add') {
5415                         push @add, $line;
5416                 }
5417                 # context line
5418                 if ($class eq 'ctx') {
5419                         push @ctx, $line;
5420                 }
5421
5422                 $prev_class = $class;
5423         }
5424 }
5425
5426 sub git_patchset_body {
5427         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5428         my ($hash_parent) = $hash_parents[0];
5429
5430         my $is_combined = (@hash_parents > 1);
5431         my $patch_idx = 0;
5432         my $patch_number = 0;
5433         my $patch_line;
5434         my $diffinfo;
5435         my $to_name;
5436         my (%from, %to);
5437         my @chunk; # for side-by-side diff
5438
5439         print "<div class=\"patchset\">\n";
5440
5441         # skip to first patch
5442         while ($patch_line = <$fd>) {
5443                 chomp $patch_line;
5444
5445                 last if ($patch_line =~ m/^diff /);
5446         }
5447
5448  PATCH:
5449         while ($patch_line) {
5450
5451                 # parse "git diff" header line
5452                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5453                         # $1 is from_name, which we do not use
5454                         $to_name = unquote($2);
5455                         $to_name =~ s!^b/!!;
5456                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5457                         # $1 is 'cc' or 'combined', which we do not use
5458                         $to_name = unquote($2);
5459                 } else {
5460                         $to_name = undef;
5461                 }
5462
5463                 # check if current patch belong to current raw line
5464                 # and parse raw git-diff line if needed
5465                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5466                         # this is continuation of a split patch
5467                         print "<div class=\"patch cont\">\n";
5468                 } else {
5469                         # advance raw git-diff output if needed
5470                         $patch_idx++ if defined $diffinfo;
5471
5472                         # read and prepare patch information
5473                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5474
5475                         # compact combined diff output can have some patches skipped
5476                         # find which patch (using pathname of result) we are at now;
5477                         if ($is_combined) {
5478                                 while ($to_name ne $diffinfo->{'to_file'}) {
5479                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5480                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5481                                               "</div>\n";  # class="patch"
5482
5483                                         $patch_idx++;
5484                                         $patch_number++;
5485
5486                                         last if $patch_idx > $#$difftree;
5487                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5488                                 }
5489                         }
5490
5491                         # modifies %from, %to hashes
5492                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5493
5494                         # this is first patch for raw difftree line with $patch_idx index
5495                         # we index @$difftree array from 0, but number patches from 1
5496                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5497                 }
5498
5499                 # git diff header
5500                 #assert($patch_line =~ m/^diff /) if DEBUG;
5501                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5502                 $patch_number++;
5503                 # print "git diff" header
5504                 print format_git_diff_header_line($patch_line, $diffinfo,
5505                                                   \%from, \%to);
5506
5507                 # print extended diff header
5508                 print "<div class=\"diff extended_header\">\n";
5509         EXTENDED_HEADER:
5510                 while ($patch_line = <$fd>) {
5511                         chomp $patch_line;
5512
5513                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5514
5515                         print format_extended_diff_header_line($patch_line, $diffinfo,
5516                                                                \%from, \%to);
5517                 }
5518                 print "</div>\n"; # class="diff extended_header"
5519
5520                 # from-file/to-file diff header
5521                 if (! $patch_line) {
5522                         print "</div>\n"; # class="patch"
5523                         last PATCH;
5524                 }
5525                 next PATCH if ($patch_line =~ m/^diff /);
5526                 #assert($patch_line =~ m/^---/) if DEBUG;
5527
5528                 my $last_patch_line = $patch_line;
5529                 $patch_line = <$fd>;
5530                 chomp $patch_line;
5531                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5532
5533                 print format_diff_from_to_header($last_patch_line, $patch_line,
5534                                                  $diffinfo, \%from, \%to,
5535                                                  @hash_parents);
5536
5537                 # the patch itself
5538         LINE:
5539                 while ($patch_line = <$fd>) {
5540                         chomp $patch_line;
5541
5542                         next PATCH if ($patch_line =~ m/^diff /);
5543
5544                         my $class = diff_line_class($patch_line, \%from, \%to);
5545
5546                         if ($class eq 'chunk_header') {
5547                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5548                                 @chunk = ();
5549                         }
5550
5551                         push @chunk, [ $class, $patch_line ];
5552                 }
5553
5554         } continue {
5555                 if (@chunk) {
5556                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5557                         @chunk = ();
5558                 }
5559                 print "</div>\n"; # class="patch"
5560         }
5561
5562         # for compact combined (--cc) format, with chunk and patch simplification
5563         # the patchset might be empty, but there might be unprocessed raw lines
5564         for (++$patch_idx if $patch_number > 0;
5565              $patch_idx < @$difftree;
5566              ++$patch_idx) {
5567                 # read and prepare patch information
5568                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5569
5570                 # generate anchor for "patch" links in difftree / whatchanged part
5571                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5572                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5573                       "</div>\n";  # class="patch"
5574
5575                 $patch_number++;
5576         }
5577
5578         if ($patch_number == 0) {
5579                 if (@hash_parents > 1) {
5580                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5581                 } else {
5582                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5583                 }
5584         }
5585
5586         print "</div>\n"; # class="patchset"
5587 }
5588
5589 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5590
5591 sub git_project_search_form {
5592         my ($searchtext, $search_use_regexp) = @_;
5593
5594         my $limit = '';
5595         if ($project_filter) {
5596                 $limit = " in '$project_filter/'";
5597         }
5598
5599         print "<div class=\"projsearch\">\n";
5600         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5601               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5602         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5603                 if (defined $project_filter);
5604         print $cgi->textfield(-name => 's', -value => $searchtext,
5605                               -title => "Search project by name and description$limit",
5606                               -size => 60) . "\n" .
5607               "<span title=\"Extended regular expression\">" .
5608               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5609                              -checked => $search_use_regexp) .
5610               "</span>\n" .
5611               $cgi->submit(-name => 'btnS', -value => 'Search') .
5612               $cgi->end_form() . "\n" .
5613               $cgi->a({-href => href(project => undef, searchtext => undef,
5614                                      project_filter => $project_filter)},
5615                       esc_html("List all projects$limit")) . "<br />\n";
5616         print "</div>\n";
5617 }
5618
5619 # entry for given @keys needs filling if at least one of keys in list
5620 # is not present in %$project_info
5621 sub project_info_needs_filling {
5622         my ($project_info, @keys) = @_;
5623
5624         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5625         foreach my $key (@keys) {
5626                 if (!exists $project_info->{$key}) {
5627                         return 1;
5628                 }
5629         }
5630         return;
5631 }
5632
5633 # fills project list info (age, description, owner, category, forks, etc.)
5634 # for each project in the list, removing invalid projects from
5635 # returned list, or fill only specified info.
5636 #
5637 # Invalid projects are removed from the returned list if and only if you
5638 # ask 'age' or 'age_string' to be filled, because they are the only fields
5639 # that run unconditionally git command that requires repository, and
5640 # therefore do always check if project repository is invalid.
5641 #
5642 # USAGE:
5643 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5644 #   ensures that 'descr_long' and 'ctags' fields are filled
5645 # * @project_list = fill_project_list_info(\@project_list)
5646 #   ensures that all fields are filled (and invalid projects removed)
5647 #
5648 # NOTE: modifies $projlist, but does not remove entries from it
5649 sub fill_project_list_info {
5650         my ($projlist, @wanted_keys) = @_;
5651         my @projects;
5652         my $filter_set = sub { return @_; };
5653         if (@wanted_keys) {
5654                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5655                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5656         }
5657
5658         my $show_ctags = gitweb_check_feature('ctags');
5659  PROJECT:
5660         foreach my $pr (@$projlist) {
5661                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5662                         my (@activity) = git_get_last_activity($pr->{'path'});
5663                         unless (@activity) {
5664                                 next PROJECT;
5665                         }
5666                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5667                 }
5668                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5669                         my $descr = git_get_project_description($pr->{'path'}) || "";
5670                         $descr = to_utf8($descr);
5671                         $pr->{'descr_long'} = $descr;
5672                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5673                 }
5674                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5675                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5676                 }
5677                 if ($show_ctags &&
5678                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5679                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5680                 }
5681                 if ($projects_list_group_categories &&
5682                     project_info_needs_filling($pr, $filter_set->('category'))) {
5683                         my $cat = git_get_project_category($pr->{'path'}) ||
5684                                                            $project_list_default_category;
5685                         $pr->{'category'} = to_utf8($cat);
5686                 }
5687
5688                 push @projects, $pr;
5689         }
5690
5691         return @projects;
5692 }
5693
5694 sub sort_projects_list {
5695         my ($projlist, $order) = @_;
5696
5697         sub order_str {
5698                 my $key = shift;
5699                 return sub { $a->{$key} cmp $b->{$key} };
5700         }
5701
5702         sub order_num_then_undef {
5703                 my $key = shift;
5704                 return sub {
5705                         defined $a->{$key} ?
5706                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5707                                 (defined $b->{$key} ? 1 : 0)
5708                 };
5709         }
5710
5711         my %orderings = (
5712                 project => order_str('path'),
5713                 descr => order_str('descr_long'),
5714                 owner => order_str('owner'),
5715                 age => order_num_then_undef('age'),
5716         );
5717
5718         my $ordering = $orderings{$order};
5719         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5720 }
5721
5722 # returns a hash of categories, containing the list of project
5723 # belonging to each category
5724 sub build_projlist_by_category {
5725         my ($projlist, $from, $to) = @_;
5726         my %categories;
5727
5728         $from = 0 unless defined $from;
5729         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5730
5731         for (my $i = $from; $i <= $to; $i++) {
5732                 my $pr = $projlist->[$i];
5733                 push @{$categories{ $pr->{'category'} }}, $pr;
5734         }
5735
5736         return wantarray ? %categories : \%categories;
5737 }
5738
5739 # print 'sort by' <th> element, generating 'sort by $name' replay link
5740 # if that order is not selected
5741 sub print_sort_th {
5742         print format_sort_th(@_);
5743 }
5744
5745 sub format_sort_th {
5746         my ($name, $order, $header) = @_;
5747         my $sort_th = "";
5748         $header ||= ucfirst($name);
5749
5750         if ($order eq $name) {
5751                 $sort_th .= "<th>$header</th>\n";
5752         } else {
5753                 $sort_th .= "<th>" .
5754                             $cgi->a({-href => href(-replay=>1, order=>$name),
5755                                      -class => "header"}, $header) .
5756                             "</th>\n";
5757         }
5758
5759         return $sort_th;
5760 }
5761
5762 sub git_project_list_rows {
5763         my ($projlist, $from, $to, $check_forks) = @_;
5764
5765         $from = 0 unless defined $from;
5766         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5767
5768         my $alternate = 1;
5769         for (my $i = $from; $i <= $to; $i++) {
5770                 my $pr = $projlist->[$i];
5771
5772                 if ($alternate) {
5773                         print "<tr class=\"dark\">\n";
5774                 } else {
5775                         print "<tr class=\"light\">\n";
5776                 }
5777                 $alternate ^= 1;
5778
5779                 if ($check_forks) {
5780                         print "<td>";
5781                         if ($pr->{'forks'}) {
5782                                 my $nforks = scalar @{$pr->{'forks'}};
5783                                 if ($nforks > 0) {
5784                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5785                                                        -title => "$nforks forks"}, "+");
5786                                 } else {
5787                                         print $cgi->span({-title => "$nforks forks"}, "+");
5788                                 }
5789                         }
5790                         print "</td>\n";
5791                 }
5792                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5793                                         -class => "list"},
5794                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5795                       "</td>\n" .
5796                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5797                                         -class => "list",
5798                                         -title => $pr->{'descr_long'}},
5799                                         $search_regexp
5800                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5801                                                                     $pr->{'descr'}, $search_regexp)
5802                                         : esc_html($pr->{'descr'})) .
5803                       "</td>\n";
5804                 unless ($omit_owner) {
5805                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5806                 }
5807                 unless ($omit_age_column) {
5808                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5809                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5810                 }
5811                 print"<td class=\"link\">" .
5812                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5813                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5814                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5815                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5816                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5817                       "</td>\n" .
5818                       "</tr>\n";
5819         }
5820 }
5821
5822 sub git_project_list_body {
5823         # actually uses global variable $project
5824         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5825         my @projects = @$projlist;
5826
5827         my $check_forks = gitweb_check_feature('forks');
5828         my $show_ctags  = gitweb_check_feature('ctags');
5829         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5830         $check_forks = undef
5831                 if ($tagfilter || $search_regexp);
5832
5833         # filtering out forks before filling info allows to do less work
5834         @projects = filter_forks_from_projects_list(\@projects)
5835                 if ($check_forks);
5836         # search_projects_list pre-fills required info
5837         @projects = search_projects_list(\@projects,
5838                                          'search_regexp' => $search_regexp,
5839                                          'tagfilter'  => $tagfilter)
5840                 if ($tagfilter || $search_regexp);
5841         # fill the rest
5842         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5843         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5844         push @all_fields, 'owner' unless($omit_owner);
5845         @projects = fill_project_list_info(\@projects, @all_fields);
5846
5847         $order ||= $default_projects_order;
5848         $from = 0 unless defined $from;
5849         $to = $#projects if (!defined $to || $#projects < $to);
5850
5851         # short circuit
5852         if ($from > $to) {
5853                 print "<center>\n".
5854                       "<b>No such projects found</b><br />\n".
5855                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5856                       "</center>\n<br />\n";
5857                 return;
5858         }
5859
5860         @projects = sort_projects_list(\@projects, $order);
5861
5862         if ($show_ctags) {
5863                 my $ctags = git_gather_all_ctags(\@projects);
5864                 my $cloud = git_populate_project_tagcloud($ctags);
5865                 print git_show_project_tagcloud($cloud, 64);
5866         }
5867
5868         print "<table class=\"project_list\">\n";
5869         unless ($no_header) {
5870                 print "<tr>\n";
5871                 if ($check_forks) {
5872                         print "<th></th>\n";
5873                 }
5874                 print_sort_th('project', $order, 'Project');
5875                 print_sort_th('descr', $order, 'Description');
5876                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5877                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5878                 print "<th></th>\n" . # for links
5879                       "</tr>\n";
5880         }
5881
5882         if ($projects_list_group_categories) {
5883                 # only display categories with projects in the $from-$to window
5884                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5885                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5886                 foreach my $cat (sort keys %categories) {
5887                         unless ($cat eq "") {
5888                                 print "<tr>\n";
5889                                 if ($check_forks) {
5890                                         print "<td></td>\n";
5891                                 }
5892                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5893                                 print "</tr>\n";
5894                         }
5895
5896                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5897                 }
5898         } else {
5899                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5900         }
5901
5902         if (defined $extra) {
5903                 print "<tr>\n";
5904                 if ($check_forks) {
5905                         print "<td></td>\n";
5906                 }
5907                 print "<td colspan=\"5\">$extra</td>\n" .
5908                       "</tr>\n";
5909         }
5910         print "</table>\n";
5911 }
5912
5913 sub git_log_body {
5914         # uses global variable $project
5915         my ($commitlist, $from, $to, $refs, $extra) = @_;
5916
5917         $from = 0 unless defined $from;
5918         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5919
5920         for (my $i = 0; $i <= $to; $i++) {
5921                 my %co = %{$commitlist->[$i]};
5922                 next if !%co;
5923                 my $commit = $co{'id'};
5924                 my $ref = format_ref_marker($refs, $commit);
5925                 git_print_header_div('commit',
5926                                "<span class=\"age\">$co{'age_string'}</span>" .
5927                                esc_html($co{'title'}) . $ref,
5928                                $commit);
5929                 print "<div class=\"title_text\">\n" .
5930                       "<div class=\"log_link\">\n" .
5931                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5932                       " | " .
5933                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5934                       " | " .
5935                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5936                       "<br/>\n" .
5937                       "</div>\n";
5938                       git_print_authorship(\%co, -tag => 'span');
5939                       print "<br/>\n</div>\n";
5940
5941                 print "<div class=\"log_body\">\n";
5942                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5943                 print "</div>\n";
5944         }
5945         if ($extra) {
5946                 print "<div class=\"page_nav\">\n";
5947                 print "$extra\n";
5948                 print "</div>\n";
5949         }
5950 }
5951
5952 sub git_shortlog_body {
5953         # uses global variable $project
5954         my ($commitlist, $from, $to, $refs, $extra) = @_;
5955
5956         $from = 0 unless defined $from;
5957         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5958
5959         print "<table class=\"shortlog\">\n";
5960         my $alternate = 1;
5961         for (my $i = $from; $i <= $to; $i++) {
5962                 my %co = %{$commitlist->[$i]};
5963                 my $commit = $co{'id'};
5964                 my $ref = format_ref_marker($refs, $commit);
5965                 if ($alternate) {
5966                         print "<tr class=\"dark\">\n";
5967                 } else {
5968                         print "<tr class=\"light\">\n";
5969                 }
5970                 $alternate ^= 1;
5971                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5972                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5973                       format_author_html('td', \%co, 10) . "<td>";
5974                 print format_subject_html($co{'title'}, $co{'title_short'},
5975                                           href(action=>"commit", hash=>$commit), $ref);
5976                 print "</td>\n" .
5977                       "<td class=\"link\">" .
5978                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5979                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5980                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5981                 my $snapshot_links = format_snapshot_links($commit);
5982                 if (defined $snapshot_links) {
5983                         print " | " . $snapshot_links;
5984                 }
5985                 print "</td>\n" .
5986                       "</tr>\n";
5987         }
5988         if (defined $extra) {
5989                 print "<tr>\n" .
5990                       "<td colspan=\"4\">$extra</td>\n" .
5991                       "</tr>\n";
5992         }
5993         print "</table>\n";
5994 }
5995
5996 sub git_history_body {
5997         # Warning: assumes constant type (blob or tree) during history
5998         my ($commitlist, $from, $to, $refs, $extra,
5999             $file_name, $file_hash, $ftype) = @_;
6000
6001         $from = 0 unless defined $from;
6002         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
6003
6004         print "<table class=\"history\">\n";
6005         my $alternate = 1;
6006         for (my $i = $from; $i <= $to; $i++) {
6007                 my %co = %{$commitlist->[$i]};
6008                 if (!%co) {
6009                         next;
6010                 }
6011                 my $commit = $co{'id'};
6012
6013                 my $ref = format_ref_marker($refs, $commit);
6014
6015                 if ($alternate) {
6016                         print "<tr class=\"dark\">\n";
6017                 } else {
6018                         print "<tr class=\"light\">\n";
6019                 }
6020                 $alternate ^= 1;
6021                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6022         # shortlog:   format_author_html('td', \%co, 10)
6023                       format_author_html('td', \%co, 15, 3) . "<td>";
6024                 # originally git_history used chop_str($co{'title'}, 50)
6025                 print format_subject_html($co{'title'}, $co{'title_short'},
6026                                           href(action=>"commit", hash=>$commit), $ref);
6027                 print "</td>\n" .
6028                       "<td class=\"link\">" .
6029                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
6030                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
6031
6032                 if ($ftype eq 'blob') {
6033                         print " | " .
6034                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
6035
6036                         my $blob_current = $file_hash;
6037                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
6038                         if (defined $blob_current && defined $blob_parent &&
6039                                         $blob_current ne $blob_parent) {
6040                                 print " | " .
6041                                         $cgi->a({-href => href(action=>"blobdiff",
6042                                                                hash=>$blob_current, hash_parent=>$blob_parent,
6043                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
6044                                                                file_name=>$file_name)},
6045                                                 "diff to current");
6046                         }
6047                 }
6048                 print "</td>\n" .
6049                       "</tr>\n";
6050         }
6051         if (defined $extra) {
6052                 print "<tr>\n" .
6053                       "<td colspan=\"4\">$extra</td>\n" .
6054                       "</tr>\n";
6055         }
6056         print "</table>\n";
6057 }
6058
6059 sub git_tags_body {
6060         # uses global variable $project
6061         my ($taglist, $from, $to, $extra) = @_;
6062         $from = 0 unless defined $from;
6063         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6064
6065         print "<table class=\"tags\">\n";
6066         my $alternate = 1;
6067         for (my $i = $from; $i <= $to; $i++) {
6068                 my $entry = $taglist->[$i];
6069                 my %tag = %$entry;
6070                 my $comment = $tag{'subject'};
6071                 my $comment_short;
6072                 if (defined $comment) {
6073                         $comment_short = chop_str($comment, 30, 5);
6074                 }
6075                 if ($alternate) {
6076                         print "<tr class=\"dark\">\n";
6077                 } else {
6078                         print "<tr class=\"light\">\n";
6079                 }
6080                 $alternate ^= 1;
6081                 if (defined $tag{'age'}) {
6082                         print "<td><i>$tag{'age'}</i></td>\n";
6083                 } else {
6084                         print "<td></td>\n";
6085                 }
6086                 print "<td>" .
6087                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6088                                -class => "list name"}, esc_html($tag{'name'})) .
6089                       "</td>\n" .
6090                       "<td>";
6091                 if (defined $comment) {
6092                         print format_subject_html($comment, $comment_short,
6093                                                   href(action=>"tag", hash=>$tag{'id'}));
6094                 }
6095                 print "</td>\n" .
6096                       "<td class=\"selflink\">";
6097                 if ($tag{'type'} eq "tag") {
6098                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6099                 } else {
6100                         print "&nbsp;";
6101                 }
6102                 print "</td>\n" .
6103                       "<td class=\"link\">" . " | " .
6104                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6105                 if ($tag{'reftype'} eq "commit") {
6106                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6107                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6108                 } elsif ($tag{'reftype'} eq "blob") {
6109                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6110                 }
6111                 print "</td>\n" .
6112                       "</tr>";
6113         }
6114         if (defined $extra) {
6115                 print "<tr>\n" .
6116                       "<td colspan=\"5\">$extra</td>\n" .
6117                       "</tr>\n";
6118         }
6119         print "</table>\n";
6120 }
6121
6122 sub git_heads_body {
6123         # uses global variable $project
6124         my ($headlist, $head_at, $from, $to, $extra) = @_;
6125         $from = 0 unless defined $from;
6126         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6127
6128         print "<table class=\"heads\">\n";
6129         my $alternate = 1;
6130         for (my $i = $from; $i <= $to; $i++) {
6131                 my $entry = $headlist->[$i];
6132                 my %ref = %$entry;
6133                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6134                 if ($alternate) {
6135                         print "<tr class=\"dark\">\n";
6136                 } else {
6137                         print "<tr class=\"light\">\n";
6138                 }
6139                 $alternate ^= 1;
6140                 print "<td><i>$ref{'age'}</i></td>\n" .
6141                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6142                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6143                                -class => "list name"},esc_html($ref{'name'})) .
6144                       "</td>\n" .
6145                       "<td class=\"link\">" .
6146                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6147                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6148                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6149                       "</td>\n" .
6150                       "</tr>";
6151         }
6152         if (defined $extra) {
6153                 print "<tr>\n" .
6154                       "<td colspan=\"3\">$extra</td>\n" .
6155                       "</tr>\n";
6156         }
6157         print "</table>\n";
6158 }
6159
6160 # Display a single remote block
6161 sub git_remote_block {
6162         my ($remote, $rdata, $limit, $head) = @_;
6163
6164         my $heads = $rdata->{'heads'};
6165         my $fetch = $rdata->{'fetch'};
6166         my $push = $rdata->{'push'};
6167
6168         my $urls_table = "<table class=\"projects_list\">\n" ;
6169
6170         if (defined $fetch) {
6171                 if ($fetch eq $push) {
6172                         $urls_table .= format_repo_url("URL", $fetch);
6173                 } else {
6174                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6175                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6176                 }
6177         } elsif (defined $push) {
6178                 $urls_table .= format_repo_url("Push URL", $push);
6179         } else {
6180                 $urls_table .= format_repo_url("", "No remote URL");
6181         }
6182
6183         $urls_table .= "</table>\n";
6184
6185         my $dots;
6186         if (defined $limit && $limit < @$heads) {
6187                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6188         }
6189
6190         print $urls_table;
6191         git_heads_body($heads, $head, 0, $limit, $dots);
6192 }
6193
6194 # Display a list of remote names with the respective fetch and push URLs
6195 sub git_remotes_list {
6196         my ($remotedata, $limit) = @_;
6197         print "<table class=\"heads\">\n";
6198         my $alternate = 1;
6199         my @remotes = sort keys %$remotedata;
6200
6201         my $limited = $limit && $limit < @remotes;
6202
6203         $#remotes = $limit - 1 if $limited;
6204
6205         while (my $remote = shift @remotes) {
6206                 my $rdata = $remotedata->{$remote};
6207                 my $fetch = $rdata->{'fetch'};
6208                 my $push = $rdata->{'push'};
6209                 if ($alternate) {
6210                         print "<tr class=\"dark\">\n";
6211                 } else {
6212                         print "<tr class=\"light\">\n";
6213                 }
6214                 $alternate ^= 1;
6215                 print "<td>" .
6216                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6217                                -class=> "list name"},esc_html($remote)) .
6218                       "</td>";
6219                 print "<td class=\"link\">" .
6220                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6221                       " | " .
6222                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6223                       "</td>";
6224
6225                 print "</tr>\n";
6226         }
6227
6228         if ($limited) {
6229                 print "<tr>\n" .
6230                       "<td colspan=\"3\">" .
6231                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6232                       "</td>\n" . "</tr>\n";
6233         }
6234
6235         print "</table>";
6236 }
6237
6238 # Display remote heads grouped by remote, unless there are too many
6239 # remotes, in which case we only display the remote names
6240 sub git_remotes_body {
6241         my ($remotedata, $limit, $head) = @_;
6242         if ($limit and $limit < keys %$remotedata) {
6243                 git_remotes_list($remotedata, $limit);
6244         } else {
6245                 fill_remote_heads($remotedata);
6246                 while (my ($remote, $rdata) = each %$remotedata) {
6247                         git_print_section({-class=>"remote", -id=>$remote},
6248                                 ["remotes", $remote, $remote], sub {
6249                                         git_remote_block($remote, $rdata, $limit, $head);
6250                                 });
6251                 }
6252         }
6253 }
6254
6255 sub git_search_message {
6256         my %co = @_;
6257
6258         my $greptype;
6259         if ($searchtype eq 'commit') {
6260                 $greptype = "--grep=";
6261         } elsif ($searchtype eq 'author') {
6262                 $greptype = "--author=";
6263         } elsif ($searchtype eq 'committer') {
6264                 $greptype = "--committer=";
6265         }
6266         $greptype .= $searchtext;
6267         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6268                                        $greptype, '--regexp-ignore-case',
6269                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6270
6271         my $paging_nav = '';
6272         if ($page > 0) {
6273                 $paging_nav .=
6274                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6275                                 "first") .
6276                         " &sdot; " .
6277                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6278                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6279         } else {
6280                 $paging_nav .= "first &sdot; prev";
6281         }
6282         my $next_link = '';
6283         if ($#commitlist >= 100) {
6284                 $next_link =
6285                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6286                                  -accesskey => "n", -title => "Alt-n"}, "next");
6287                 $paging_nav .= " &sdot; $next_link";
6288         } else {
6289                 $paging_nav .= " &sdot; next";
6290         }
6291
6292         git_header_html();
6293
6294         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6295         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6296         if ($page == 0 && !@commitlist) {
6297                 print "<p>No match.</p>\n";
6298         } else {
6299                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6300         }
6301
6302         git_footer_html();
6303 }
6304
6305 sub git_search_changes {
6306         my %co = @_;
6307
6308         local $/ = "\n";
6309         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6310                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6311                 ($search_use_regexp ? '--pickaxe-regex' : ())
6312                         or die_error(500, "Open git-log failed");
6313
6314         git_header_html();
6315
6316         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6317         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6318
6319         print "<table class=\"pickaxe search\">\n";
6320         my $alternate = 1;
6321         undef %co;
6322         my @files;
6323         while (my $line = <$fd>) {
6324                 chomp $line;
6325                 next unless $line;
6326
6327                 my %set = parse_difftree_raw_line($line);
6328                 if (defined $set{'commit'}) {
6329                         # finish previous commit
6330                         if (%co) {
6331                                 print "</td>\n" .
6332                                       "<td class=\"link\">" .
6333                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6334                                               "commit") .
6335                                       " | " .
6336                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6337                                                              hash_base=>$co{'id'})},
6338                                               "tree") .
6339                                       "</td>\n" .
6340                                       "</tr>\n";
6341                         }
6342
6343                         if ($alternate) {
6344                                 print "<tr class=\"dark\">\n";
6345                         } else {
6346                                 print "<tr class=\"light\">\n";
6347                         }
6348                         $alternate ^= 1;
6349                         %co = parse_commit($set{'commit'});
6350                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6351                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6352                               "<td><i>$author</i></td>\n" .
6353                               "<td>" .
6354                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6355                                       -class => "list subject"},
6356                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6357                 } elsif (defined $set{'to_id'}) {
6358                         next if is_deleted(\%set);
6359
6360                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6361                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6362                                       -class => "list"},
6363                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6364                               "<br/>\n";
6365                 }
6366         }
6367         close $fd;
6368
6369         # finish last commit (warning: repetition!)
6370         if (%co) {
6371                 print "</td>\n" .
6372                       "<td class=\"link\">" .
6373                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6374                               "commit") .
6375                       " | " .
6376                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6377                                              hash_base=>$co{'id'})},
6378                               "tree") .
6379                       "</td>\n" .
6380                       "</tr>\n";
6381         }
6382
6383         print "</table>\n";
6384
6385         git_footer_html();
6386 }
6387
6388 sub git_search_files {
6389         my %co = @_;
6390
6391         local $/ = "\n";
6392         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6393                 $search_use_regexp ? ('-E', '-i') : '-F',
6394                 $searchtext, $co{'tree'}
6395                         or die_error(500, "Open git-grep failed");
6396
6397         git_header_html();
6398
6399         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6400         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6401
6402         print "<table class=\"grep_search\">\n";
6403         my $alternate = 1;
6404         my $matches = 0;
6405         my $lastfile = '';
6406         my $file_href;
6407         while (my $line = <$fd>) {
6408                 chomp $line;
6409                 my ($file, $lno, $ltext, $binary);
6410                 last if ($matches++ > 1000);
6411                 if ($line =~ /^Binary file (.+) matches$/) {
6412                         $file = $1;
6413                         $binary = 1;
6414                 } else {
6415                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6416                         $file =~ s/^$co{'tree'}://;
6417                 }
6418                 if ($file ne $lastfile) {
6419                         $lastfile and print "</td></tr>\n";
6420                         if ($alternate++) {
6421                                 print "<tr class=\"dark\">\n";
6422                         } else {
6423                                 print "<tr class=\"light\">\n";
6424                         }
6425                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6426                                           file_name=>$file);
6427                         print "<td class=\"list\">".
6428                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6429                         print "</td><td>\n";
6430                         $lastfile = $file;
6431                 }
6432                 if ($binary) {
6433                         print "<div class=\"binary\">Binary file</div>\n";
6434                 } else {
6435                         $ltext = untabify($ltext);
6436                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6437                                 $ltext = esc_html($1, -nbsp=>1);
6438                                 $ltext .= '<span class="match">';
6439                                 $ltext .= esc_html($2, -nbsp=>1);
6440                                 $ltext .= '</span>';
6441                                 $ltext .= esc_html($3, -nbsp=>1);
6442                         } else {
6443                                 $ltext = esc_html($ltext, -nbsp=>1);
6444                         }
6445                         print "<div class=\"pre\">" .
6446                                 $cgi->a({-href => $file_href.'#l'.$lno,
6447                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6448                                 ' ' .  $ltext . "</div>\n";
6449                 }
6450         }
6451         if ($lastfile) {
6452                 print "</td></tr>\n";
6453                 if ($matches > 1000) {
6454                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6455                 }
6456         } else {
6457                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6458         }
6459         close $fd;
6460
6461         print "</table>\n";
6462
6463         git_footer_html();
6464 }
6465
6466 sub git_search_grep_body {
6467         my ($commitlist, $from, $to, $extra) = @_;
6468         $from = 0 unless defined $from;
6469         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6470
6471         print "<table class=\"commit_search\">\n";
6472         my $alternate = 1;
6473         for (my $i = $from; $i <= $to; $i++) {
6474                 my %co = %{$commitlist->[$i]};
6475                 if (!%co) {
6476                         next;
6477                 }
6478                 my $commit = $co{'id'};
6479                 if ($alternate) {
6480                         print "<tr class=\"dark\">\n";
6481                 } else {
6482                         print "<tr class=\"light\">\n";
6483                 }
6484                 $alternate ^= 1;
6485                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6486                       format_author_html('td', \%co, 15, 5) .
6487                       "<td>" .
6488                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6489                                -class => "list subject"},
6490                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6491                 my $comment = $co{'comment'};
6492                 foreach my $line (@$comment) {
6493                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6494                                 my ($lead, $match, $trail) = ($1, $2, $3);
6495                                 $match = chop_str($match, 70, 5, 'center');
6496                                 my $contextlen = int((80 - length($match))/2);
6497                                 $contextlen = 30 if ($contextlen > 30);
6498                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6499                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6500
6501                                 $lead  = esc_html($lead);
6502                                 $match = esc_html($match);
6503                                 $trail = esc_html($trail);
6504
6505                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6506                         }
6507                 }
6508                 print "</td>\n" .
6509                       "<td class=\"link\">" .
6510                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6511                       " | " .
6512                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6513                       " | " .
6514                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6515                 print "</td>\n" .
6516                       "</tr>\n";
6517         }
6518         if (defined $extra) {
6519                 print "<tr>\n" .
6520                       "<td colspan=\"3\">$extra</td>\n" .
6521                       "</tr>\n";
6522         }
6523         print "</table>\n";
6524 }
6525
6526 ## ======================================================================
6527 ## ======================================================================
6528 ## actions
6529
6530 sub git_project_list {
6531         my $order = $input_params{'order'};
6532         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6533                 die_error(400, "Unknown order parameter");
6534         }
6535
6536         my @list = git_get_projects_list($project_filter, $strict_export);
6537         if (!@list) {
6538                 die_error(404, "No projects found");
6539         }
6540
6541         git_header_html();
6542         if (defined $home_text && -f $home_text) {
6543                 print "<div class=\"index_include\">\n";
6544                 insert_file($home_text);
6545                 print "</div>\n";
6546         }
6547
6548         git_project_search_form($searchtext, $search_use_regexp);
6549         git_project_list_body(\@list, $order);
6550         git_footer_html();
6551 }
6552
6553 sub git_forks {
6554         my $order = $input_params{'order'};
6555         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6556                 die_error(400, "Unknown order parameter");
6557         }
6558
6559         my $filter = $project;
6560         $filter =~ s/\.git$//;
6561         my @list = git_get_projects_list($filter);
6562         if (!@list) {
6563                 die_error(404, "No forks found");
6564         }
6565
6566         git_header_html();
6567         git_print_page_nav('','');
6568         git_print_header_div('summary', "$project forks");
6569         git_project_list_body(\@list, $order);
6570         git_footer_html();
6571 }
6572
6573 sub git_project_index {
6574         my @projects = git_get_projects_list($project_filter, $strict_export);
6575         if (!@projects) {
6576                 die_error(404, "No projects found");
6577         }
6578
6579         print $cgi->header(
6580                 -type => 'text/plain',
6581                 -charset => 'utf-8',
6582                 -content_disposition => 'inline; filename="index.aux"');
6583
6584         foreach my $pr (@projects) {
6585                 if (!exists $pr->{'owner'}) {
6586                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6587                 }
6588
6589                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6590                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6591                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6592                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6593                 $path  =~ s/ /\+/g;
6594                 $owner =~ s/ /\+/g;
6595
6596                 print "$path $owner\n";
6597         }
6598 }
6599
6600 sub git_summary {
6601         my $descr = git_get_project_description($project) || "none";
6602         my %co = parse_commit("HEAD");
6603         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6604         my $head = $co{'id'};
6605         my $remote_heads = gitweb_check_feature('remote_heads');
6606
6607         my $owner = git_get_project_owner($project);
6608
6609         my $refs = git_get_references();
6610         # These get_*_list functions return one more to allow us to see if
6611         # there are more ...
6612         my @taglist  = git_get_tags_list(16);
6613         my @headlist = git_get_heads_list(16);
6614         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6615         my @forklist;
6616         my $check_forks = gitweb_check_feature('forks');
6617
6618         if ($check_forks) {
6619                 # find forks of a project
6620                 my $filter = $project;
6621                 $filter =~ s/\.git$//;
6622                 @forklist = git_get_projects_list($filter);
6623                 # filter out forks of forks
6624                 @forklist = filter_forks_from_projects_list(\@forklist)
6625                         if (@forklist);
6626         }
6627
6628         git_header_html();
6629         git_print_page_nav('summary','', $head);
6630
6631         print "<div class=\"title\">&nbsp;</div>\n";
6632         print "<table class=\"projects_list\">\n" .
6633               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6634         if ($owner and not $omit_owner) {
6635                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6636         }
6637         if (defined $cd{'rfc2822'}) {
6638                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6639                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6640         }
6641
6642         # use per project git URL list in $projectroot/$project/cloneurl
6643         # or make project git URL from git base URL and project name
6644         my $url_tag = "URL";
6645         my @url_list = git_get_project_url_list($project);
6646         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6647         foreach my $git_url (@url_list) {
6648                 next unless $git_url;
6649                 print format_repo_url($url_tag, $git_url);
6650                 $url_tag = "";
6651         }
6652
6653         # Tag cloud
6654         my $show_ctags = gitweb_check_feature('ctags');
6655         if ($show_ctags) {
6656                 my $ctags = git_get_project_ctags($project);
6657                 if (%$ctags) {
6658                         # without ability to add tags, don't show if there are none
6659                         my $cloud = git_populate_project_tagcloud($ctags);
6660                         print "<tr id=\"metadata_ctags\">" .
6661                               "<td>content tags</td>" .
6662                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6663                               "</tr>\n";
6664                 }
6665         }
6666
6667         print "</table>\n";
6668
6669         # If XSS prevention is on, we don't include README.html.
6670         # TODO: Allow a readme in some safe format.
6671         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6672                 print "<div class=\"title\">readme</div>\n" .
6673                       "<div class=\"readme\">\n";
6674                 insert_file("$projectroot/$project/README.html");
6675                 print "\n</div>\n"; # class="readme"
6676         }
6677
6678         # we need to request one more than 16 (0..15) to check if
6679         # those 16 are all
6680         my @commitlist = $head ? parse_commits($head, 17) : ();
6681         if (@commitlist) {
6682                 git_print_header_div('shortlog');
6683                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6684                                   $#commitlist <=  15 ? undef :
6685                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6686         }
6687
6688         if (@taglist) {
6689                 git_print_header_div('tags');
6690                 git_tags_body(\@taglist, 0, 15,
6691                               $#taglist <=  15 ? undef :
6692                               $cgi->a({-href => href(action=>"tags")}, "..."));
6693         }
6694
6695         if (@headlist) {
6696                 git_print_header_div('heads');
6697                 git_heads_body(\@headlist, $head, 0, 15,
6698                                $#headlist <= 15 ? undef :
6699                                $cgi->a({-href => href(action=>"heads")}, "..."));
6700         }
6701
6702         if (%remotedata) {
6703                 git_print_header_div('remotes');
6704                 git_remotes_body(\%remotedata, 15, $head);
6705         }
6706
6707         if (@forklist) {
6708                 git_print_header_div('forks');
6709                 git_project_list_body(\@forklist, 'age', 0, 15,
6710                                       $#forklist <= 15 ? undef :
6711                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6712                                       'no_header');
6713         }
6714
6715         git_footer_html();
6716 }
6717
6718 sub git_tag {
6719         my %tag = parse_tag($hash);
6720
6721         if (! %tag) {
6722                 die_error(404, "Unknown tag object");
6723         }
6724
6725         my $head = git_get_head_hash($project);
6726         git_header_html();
6727         git_print_page_nav('','', $head,undef,$head);
6728         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6729         print "<div class=\"title_text\">\n" .
6730               "<table class=\"object_header\">\n" .
6731               "<tr>\n" .
6732               "<td>object</td>\n" .
6733               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6734                                $tag{'object'}) . "</td>\n" .
6735               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6736                                               $tag{'type'}) . "</td>\n" .
6737               "</tr>\n";
6738         if (defined($tag{'author'})) {
6739                 git_print_authorship_rows(\%tag, 'author');
6740         }
6741         print "</table>\n\n" .
6742               "</div>\n";
6743         print "<div class=\"page_body\">";
6744         my $comment = $tag{'comment'};
6745         foreach my $line (@$comment) {
6746                 chomp $line;
6747                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6748         }
6749         print "</div>\n";
6750         git_footer_html();
6751 }
6752
6753 sub git_blame_common {
6754         my $format = shift || 'porcelain';
6755         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6756                 $format = 'incremental';
6757                 $action = 'blame_incremental'; # for page title etc
6758         }
6759
6760         # permissions
6761         gitweb_check_feature('blame')
6762                 or die_error(403, "Blame view not allowed");
6763
6764         # error checking
6765         die_error(400, "No file name given") unless $file_name;
6766         $hash_base ||= git_get_head_hash($project);
6767         die_error(404, "Couldn't find base commit") unless $hash_base;
6768         my %co = parse_commit($hash_base)
6769                 or die_error(404, "Commit not found");
6770         my $ftype = "blob";
6771         if (!defined $hash) {
6772                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6773                         or die_error(404, "Error looking up file");
6774         } else {
6775                 $ftype = git_get_type($hash);
6776                 if ($ftype !~ "blob") {
6777                         die_error(400, "Object is not a blob");
6778                 }
6779         }
6780
6781         my $fd;
6782         if ($format eq 'incremental') {
6783                 # get file contents (as base)
6784                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6785                         or die_error(500, "Open git-cat-file failed");
6786         } elsif ($format eq 'data') {
6787                 # run git-blame --incremental
6788                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6789                         $hash_base, "--", $file_name
6790                         or die_error(500, "Open git-blame --incremental failed");
6791         } else {
6792                 # run git-blame --porcelain
6793                 open $fd, "-|", git_cmd(), "blame", '-p',
6794                         $hash_base, '--', $file_name
6795                         or die_error(500, "Open git-blame --porcelain failed");
6796         }
6797         binmode $fd, ':utf8';
6798
6799         # incremental blame data returns early
6800         if ($format eq 'data') {
6801                 print $cgi->header(
6802                         -type=>"text/plain", -charset => "utf-8",
6803                         -status=> "200 OK");
6804                 local $| = 1; # output autoflush
6805                 while (my $line = <$fd>) {
6806                         print to_utf8($line);
6807                 }
6808                 close $fd
6809                         or print "ERROR $!\n";
6810
6811                 print 'END';
6812                 if (defined $t0 && gitweb_check_feature('timed')) {
6813                         print ' '.
6814                               tv_interval($t0, [ gettimeofday() ]).
6815                               ' '.$number_of_git_cmds;
6816                 }
6817                 print "\n";
6818
6819                 return;
6820         }
6821
6822         # page header
6823         git_header_html();
6824         my $formats_nav =
6825                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6826                         "blob") .
6827                 " | ";
6828         if ($format eq 'incremental') {
6829                 $formats_nav .=
6830                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6831                                 "blame") . " (non-incremental)";
6832         } else {
6833                 $formats_nav .=
6834                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6835                                 "blame") . " (incremental)";
6836         }
6837         $formats_nav .=
6838                 " | " .
6839                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6840                         "history") .
6841                 " | " .
6842                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6843                         "HEAD");
6844         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6845         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6846         git_print_page_path($file_name, $ftype, $hash_base);
6847
6848         # page body
6849         if ($format eq 'incremental') {
6850                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6851                       "This page requires JavaScript to run.\n Use ".
6852                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6853                               'this page').
6854                       " instead.\n".
6855                       "</b></center></div>\n</noscript>\n";
6856
6857                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6858         }
6859
6860         print qq!<div class="page_body">\n!;
6861         print qq!<div id="progress_info">... / ...</div>\n!
6862                 if ($format eq 'incremental');
6863         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6864               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6865               qq!<thead>\n!.
6866               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6867               qq!</thead>\n!.
6868               qq!<tbody>\n!;
6869
6870         my @rev_color = qw(light dark);
6871         my $num_colors = scalar(@rev_color);
6872         my $current_color = 0;
6873
6874         if ($format eq 'incremental') {
6875                 my $color_class = $rev_color[$current_color];
6876
6877                 #contents of a file
6878                 my $linenr = 0;
6879         LINE:
6880                 while (my $line = <$fd>) {
6881                         chomp $line;
6882                         $linenr++;
6883
6884                         print qq!<tr id="l$linenr" class="$color_class">!.
6885                               qq!<td class="sha1"><a href=""> </a></td>!.
6886                               qq!<td class="linenr">!.
6887                               qq!<a class="linenr" href="">$linenr</a></td>!;
6888                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6889                         print qq!</tr>\n!;
6890                 }
6891
6892         } else { # porcelain, i.e. ordinary blame
6893                 my %metainfo = (); # saves information about commits
6894
6895                 # blame data
6896         LINE:
6897                 while (my $line = <$fd>) {
6898                         chomp $line;
6899                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6900                         # no <lines in group> for subsequent lines in group of lines
6901                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6902                            ($line =~ /^($oid_regex) (\d+) (\d+)(?: (\d+))?$/);
6903                         if (!exists $metainfo{$full_rev}) {
6904                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6905                         }
6906                         my $meta = $metainfo{$full_rev};
6907                         my $data;
6908                         while ($data = <$fd>) {
6909                                 chomp $data;
6910                                 last if ($data =~ s/^\t//); # contents of line
6911                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6912                                         $meta->{$1} = $2 unless exists $meta->{$1};
6913                                 }
6914                                 if ($data =~ /^previous /) {
6915                                         $meta->{'nprevious'}++;
6916                                 }
6917                         }
6918                         my $short_rev = substr($full_rev, 0, 8);
6919                         my $author = $meta->{'author'};
6920                         my %date =
6921                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6922                         my $date = $date{'iso-tz'};
6923                         if ($group_size) {
6924                                 $current_color = ($current_color + 1) % $num_colors;
6925                         }
6926                         my $tr_class = $rev_color[$current_color];
6927                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6928                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6929                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6930                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6931                         if ($group_size) {
6932                                 print "<td class=\"sha1\"";
6933                                 print " title=\"". esc_html($author) . ", $date\"";
6934                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6935                                 print ">";
6936                                 print $cgi->a({-href => href(action=>"commit",
6937                                                              hash=>$full_rev,
6938                                                              file_name=>$file_name)},
6939                                               esc_html($short_rev));
6940                                 if ($group_size >= 2) {
6941                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6942                                         if (@author_initials) {
6943                                                 print "<br />" .
6944                                                       esc_html(join('', @author_initials));
6945                                                 #           or join('.', ...)
6946                                         }
6947                                 }
6948                                 print "</td>\n";
6949                         }
6950                         # 'previous' <sha1 of parent commit> <filename at commit>
6951                         if (exists $meta->{'previous'} &&
6952                             $meta->{'previous'} =~ /^($oid_regex) (.*)$/) {
6953                                 $meta->{'parent'} = $1;
6954                                 $meta->{'file_parent'} = unquote($2);
6955                         }
6956                         my $linenr_commit =
6957                                 exists($meta->{'parent'}) ?
6958                                 $meta->{'parent'} : $full_rev;
6959                         my $linenr_filename =
6960                                 exists($meta->{'file_parent'}) ?
6961                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6962                         my $blamed = href(action => 'blame',
6963                                           file_name => $linenr_filename,
6964                                           hash_base => $linenr_commit);
6965                         print "<td class=\"linenr\">";
6966                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6967                                         -class => "linenr" },
6968                                       esc_html($lineno));
6969                         print "</td>";
6970                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6971                         print "</tr>\n";
6972                 } # end while
6973
6974         }
6975
6976         # footer
6977         print "</tbody>\n".
6978               "</table>\n"; # class="blame"
6979         print "</div>\n";   # class="blame_body"
6980         close $fd
6981                 or print "Reading blob failed\n";
6982
6983         git_footer_html();
6984 }
6985
6986 sub git_blame {
6987         git_blame_common();
6988 }
6989
6990 sub git_blame_incremental {
6991         git_blame_common('incremental');
6992 }
6993
6994 sub git_blame_data {
6995         git_blame_common('data');
6996 }
6997
6998 sub git_tags {
6999         my $head = git_get_head_hash($project);
7000         git_header_html();
7001         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
7002         git_print_header_div('summary', $project);
7003
7004         my @tagslist = git_get_tags_list();
7005         if (@tagslist) {
7006                 git_tags_body(\@tagslist);
7007         }
7008         git_footer_html();
7009 }
7010
7011 sub git_heads {
7012         my $head = git_get_head_hash($project);
7013         git_header_html();
7014         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
7015         git_print_header_div('summary', $project);
7016
7017         my @headslist = git_get_heads_list();
7018         if (@headslist) {
7019                 git_heads_body(\@headslist, $head);
7020         }
7021         git_footer_html();
7022 }
7023
7024 # used both for single remote view and for list of all the remotes
7025 sub git_remotes {
7026         gitweb_check_feature('remote_heads')
7027                 or die_error(403, "Remote heads view is disabled");
7028
7029         my $head = git_get_head_hash($project);
7030         my $remote = $input_params{'hash'};
7031
7032         my $remotedata = git_get_remotes_list($remote);
7033         die_error(500, "Unable to get remote information") unless defined $remotedata;
7034
7035         unless (%$remotedata) {
7036                 die_error(404, defined $remote ?
7037                         "Remote $remote not found" :
7038                         "No remotes found");
7039         }
7040
7041         git_header_html(undef, undef, -action_extra => $remote);
7042         git_print_page_nav('', '',  $head, undef, $head,
7043                 format_ref_views($remote ? '' : 'remotes'));
7044
7045         fill_remote_heads($remotedata);
7046         if (defined $remote) {
7047                 git_print_header_div('remotes', "$remote remote for $project");
7048                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
7049         } else {
7050                 git_print_header_div('summary', "$project remotes");
7051                 git_remotes_body($remotedata, undef, $head);
7052         }
7053
7054         git_footer_html();
7055 }
7056
7057 sub git_blob_plain {
7058         my $type = shift;
7059         my $expires;
7060
7061         if (!defined $hash) {
7062                 if (defined $file_name) {
7063                         my $base = $hash_base || git_get_head_hash($project);
7064                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7065                                 or die_error(404, "Cannot find file");
7066                 } else {
7067                         die_error(400, "No file name defined");
7068                 }
7069         } elsif ($hash =~ m/^$oid_regex$/) {
7070                 # blobs defined by non-textual hash id's can be cached
7071                 $expires = "+1d";
7072         }
7073
7074         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7075                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7076
7077         # content-type (can include charset)
7078         $type = blob_contenttype($fd, $file_name, $type);
7079
7080         # "save as" filename, even when no $file_name is given
7081         my $save_as = "$hash";
7082         if (defined $file_name) {
7083                 $save_as = $file_name;
7084         } elsif ($type =~ m/^text\//) {
7085                 $save_as .= '.txt';
7086         }
7087
7088         # With XSS prevention on, blobs of all types except a few known safe
7089         # ones are served with "Content-Disposition: attachment" to make sure
7090         # they don't run in our security domain.  For certain image types,
7091         # blob view writes an <img> tag referring to blob_plain view, and we
7092         # want to be sure not to break that by serving the image as an
7093         # attachment (though Firefox 3 doesn't seem to care).
7094         my $sandbox = $prevent_xss &&
7095                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7096
7097         # serve text/* as text/plain
7098         if ($prevent_xss &&
7099             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7100              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7101                 my $rest = $1;
7102                 $rest = defined $rest ? $rest : '';
7103                 $type = "text/plain$rest";
7104         }
7105
7106         print $cgi->header(
7107                 -type => $type,
7108                 -expires => $expires,
7109                 -content_disposition =>
7110                         ($sandbox ? 'attachment' : 'inline')
7111                         . '; filename="' . $save_as . '"');
7112         local $/ = undef;
7113         local *FCGI::Stream::PRINT = $FCGI_Stream_PRINT_raw;
7114         binmode STDOUT, ':raw';
7115         print <$fd>;
7116         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7117         close $fd;
7118 }
7119
7120 sub git_blob {
7121         my $expires;
7122
7123         if (!defined $hash) {
7124                 if (defined $file_name) {
7125                         my $base = $hash_base || git_get_head_hash($project);
7126                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7127                                 or die_error(404, "Cannot find file");
7128                 } else {
7129                         die_error(400, "No file name defined");
7130                 }
7131         } elsif ($hash =~ m/^$oid_regex$/) {
7132                 # blobs defined by non-textual hash id's can be cached
7133                 $expires = "+1d";
7134         }
7135
7136         my $have_blame = gitweb_check_feature('blame');
7137         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7138                 or die_error(500, "Couldn't cat $file_name, $hash");
7139         my $mimetype = blob_mimetype($fd, $file_name);
7140         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7141         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7142                 close $fd;
7143                 return git_blob_plain($mimetype);
7144         }
7145         # we can have blame only for text/* mimetype
7146         $have_blame &&= ($mimetype =~ m!^text/!);
7147
7148         my $highlight = gitweb_check_feature('highlight');
7149         my $syntax = guess_file_syntax($highlight, $file_name);
7150         $fd = run_highlighter($fd, $highlight, $syntax);
7151
7152         git_header_html(undef, $expires);
7153         my $formats_nav = '';
7154         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7155                 if (defined $file_name) {
7156                         if ($have_blame) {
7157                                 $formats_nav .=
7158                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7159                                                 "blame") .
7160                                         " | ";
7161                         }
7162                         $formats_nav .=
7163                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7164                                         "history") .
7165                                 " | " .
7166                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7167                                         "raw") .
7168                                 " | " .
7169                                 $cgi->a({-href => href(action=>"blob",
7170                                                        hash_base=>"HEAD", file_name=>$file_name)},
7171                                         "HEAD");
7172                 } else {
7173                         $formats_nav .=
7174                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7175                                         "raw");
7176                 }
7177                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7178                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7179         } else {
7180                 print "<div class=\"page_nav\">\n" .
7181                       "<br/><br/></div>\n" .
7182                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7183         }
7184         git_print_page_path($file_name, "blob", $hash_base);
7185         print "<div class=\"page_body\">\n";
7186         if ($mimetype =~ m!^image/!) {
7187                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7188                 if ($file_name) {
7189                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7190                 }
7191                 print qq! src="! .
7192                       esc_attr(href(action=>"blob_plain", hash=>$hash,
7193                            hash_base=>$hash_base, file_name=>$file_name)) .
7194                       qq!" />\n!;
7195         } else {
7196                 my $nr;
7197                 while (my $line = <$fd>) {
7198                         chomp $line;
7199                         $nr++;
7200                         $line = untabify($line);
7201                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7202                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7203                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7204                 }
7205         }
7206         close $fd
7207                 or print "Reading blob failed.\n";
7208         print "</div>";
7209         git_footer_html();
7210 }
7211
7212 sub git_tree {
7213         if (!defined $hash_base) {
7214                 $hash_base = "HEAD";
7215         }
7216         if (!defined $hash) {
7217                 if (defined $file_name) {
7218                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7219                 } else {
7220                         $hash = $hash_base;
7221                 }
7222         }
7223         die_error(404, "No such tree") unless defined($hash);
7224
7225         my $show_sizes = gitweb_check_feature('show-sizes');
7226         my $have_blame = gitweb_check_feature('blame');
7227
7228         my @entries = ();
7229         {
7230                 local $/ = "\0";
7231                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7232                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7233                         or die_error(500, "Open git-ls-tree failed");
7234                 @entries = map { chomp; $_ } <$fd>;
7235                 close $fd
7236                         or die_error(404, "Reading tree failed");
7237         }
7238
7239         my $refs = git_get_references();
7240         my $ref = format_ref_marker($refs, $hash_base);
7241         git_header_html();
7242         my $basedir = '';
7243         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7244                 my @views_nav = ();
7245                 if (defined $file_name) {
7246                         push @views_nav,
7247                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7248                                         "history"),
7249                                 $cgi->a({-href => href(action=>"tree",
7250                                                        hash_base=>"HEAD", file_name=>$file_name)},
7251                                         "HEAD"),
7252                 }
7253                 my $snapshot_links = format_snapshot_links($hash);
7254                 if (defined $snapshot_links) {
7255                         # FIXME: Should be available when we have no hash base as well.
7256                         push @views_nav, $snapshot_links;
7257                 }
7258                 git_print_page_nav('tree','', $hash_base, undef, undef,
7259                                    join(' | ', @views_nav));
7260                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7261         } else {
7262                 undef $hash_base;
7263                 print "<div class=\"page_nav\">\n";
7264                 print "<br/><br/></div>\n";
7265                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7266         }
7267         if (defined $file_name) {
7268                 $basedir = $file_name;
7269                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7270                         $basedir .= '/';
7271                 }
7272                 git_print_page_path($file_name, 'tree', $hash_base);
7273         }
7274         print "<div class=\"page_body\">\n";
7275         print "<table class=\"tree\">\n";
7276         my $alternate = 1;
7277         # '..' (top directory) link if possible
7278         if (defined $hash_base &&
7279             defined $file_name && $file_name =~ m![^/]+$!) {
7280                 if ($alternate) {
7281                         print "<tr class=\"dark\">\n";
7282                 } else {
7283                         print "<tr class=\"light\">\n";
7284                 }
7285                 $alternate ^= 1;
7286
7287                 my $up = $file_name;
7288                 $up =~ s!/?[^/]+$!!;
7289                 undef $up unless $up;
7290                 # based on git_print_tree_entry
7291                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7292                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7293                 print '<td class="list">';
7294                 print $cgi->a({-href => href(action=>"tree",
7295                                              hash_base=>$hash_base,
7296                                              file_name=>$up)},
7297                               "..");
7298                 print "</td>\n";
7299                 print "<td class=\"link\"></td>\n";
7300
7301                 print "</tr>\n";
7302         }
7303         foreach my $line (@entries) {
7304                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7305
7306                 if ($alternate) {
7307                         print "<tr class=\"dark\">\n";
7308                 } else {
7309                         print "<tr class=\"light\">\n";
7310                 }
7311                 $alternate ^= 1;
7312
7313                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7314
7315                 print "</tr>\n";
7316         }
7317         print "</table>\n" .
7318               "</div>";
7319         git_footer_html();
7320 }
7321
7322 sub sanitize_for_filename {
7323     my $name = shift;
7324
7325     $name =~ s!/!-!g;
7326     $name =~ s/[^[:alnum:]_.-]//g;
7327
7328     return $name;
7329 }
7330
7331 sub snapshot_name {
7332         my ($project, $hash) = @_;
7333
7334         # path/to/project.git  -> project
7335         # path/to/project/.git -> project
7336         my $name = to_utf8($project);
7337         $name =~ s,([^/])/*\.git$,$1,;
7338         $name = sanitize_for_filename(basename($name));
7339
7340         my $ver = $hash;
7341         if ($hash =~ /^[0-9a-fA-F]+$/) {
7342                 # shorten SHA-1 hash
7343                 my $full_hash = git_get_full_hash($project, $hash);
7344                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7345                         $ver = git_get_short_hash($project, $hash);
7346                 }
7347         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7348                 # tags don't need shortened SHA-1 hash
7349                 $ver = $1;
7350         } else {
7351                 # branches and other need shortened SHA-1 hash
7352                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7353                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7354                         my $ref_dir = (defined $1) ? $1 : '';
7355                         $ver = $2;
7356
7357                         $ref_dir = sanitize_for_filename($ref_dir);
7358                         # for refs neither in heads nor remotes we want to
7359                         # add a ref dir to archive name
7360                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7361                                 $ver = $ref_dir . '-' . $ver;
7362                         }
7363                 }
7364                 $ver .= '-' . git_get_short_hash($project, $hash);
7365         }
7366         # special case of sanitization for filename - we change
7367         # slashes to dots instead of dashes
7368         # in case of hierarchical branch names
7369         $ver =~ s!/!.!g;
7370         $ver =~ s/[^[:alnum:]_.-]//g;
7371
7372         # name = project-version_string
7373         $name = "$name-$ver";
7374
7375         return wantarray ? ($name, $name) : $name;
7376 }
7377
7378 sub exit_if_unmodified_since {
7379         my ($latest_epoch) = @_;
7380         our $cgi;
7381
7382         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7383         if (defined $if_modified) {
7384                 my $since;
7385                 if (eval { require HTTP::Date; 1; }) {
7386                         $since = HTTP::Date::str2time($if_modified);
7387                 } elsif (eval { require Time::ParseDate; 1; }) {
7388                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7389                 }
7390                 if (defined $since && $latest_epoch <= $since) {
7391                         my %latest_date = parse_date($latest_epoch);
7392                         print $cgi->header(
7393                                 -last_modified => $latest_date{'rfc2822'},
7394                                 -status => '304 Not Modified');
7395                         goto DONE_GITWEB;
7396                 }
7397         }
7398 }
7399
7400 sub git_snapshot {
7401         my $format = $input_params{'snapshot_format'};
7402         if (!@snapshot_fmts) {
7403                 die_error(403, "Snapshots not allowed");
7404         }
7405         # default to first supported snapshot format
7406         $format ||= $snapshot_fmts[0];
7407         if ($format !~ m/^[a-z0-9]+$/) {
7408                 die_error(400, "Invalid snapshot format parameter");
7409         } elsif (!exists($known_snapshot_formats{$format})) {
7410                 die_error(400, "Unknown snapshot format");
7411         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7412                 die_error(403, "Snapshot format not allowed");
7413         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7414                 die_error(403, "Unsupported snapshot format");
7415         }
7416
7417         my $type = git_get_type("$hash^{}");
7418         if (!$type) {
7419                 die_error(404, 'Object does not exist');
7420         }  elsif ($type eq 'blob') {
7421                 die_error(400, 'Object is not a tree-ish');
7422         }
7423
7424         my ($name, $prefix) = snapshot_name($project, $hash);
7425         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7426
7427         my %co = parse_commit($hash);
7428         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7429
7430         my $cmd = quote_command(
7431                 git_cmd(), 'archive',
7432                 "--format=$known_snapshot_formats{$format}{'format'}",
7433                 "--prefix=$prefix/", $hash);
7434         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7435                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7436         }
7437
7438         $filename =~ s/(["\\])/\\$1/g;
7439         my %latest_date;
7440         if (%co) {
7441                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7442         }
7443
7444         print $cgi->header(
7445                 -type => $known_snapshot_formats{$format}{'type'},
7446                 -content_disposition => 'inline; filename="' . $filename . '"',
7447                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7448                 -status => '200 OK');
7449
7450         open my $fd, "-|", $cmd
7451                 or die_error(500, "Execute git-archive failed");
7452         local *FCGI::Stream::PRINT = $FCGI_Stream_PRINT_raw;
7453         binmode STDOUT, ':raw';
7454         print <$fd>;
7455         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7456         close $fd;
7457 }
7458
7459 sub git_log_generic {
7460         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7461
7462         my $head = git_get_head_hash($project);
7463         if (!defined $base) {
7464                 $base = $head;
7465         }
7466         if (!defined $page) {
7467                 $page = 0;
7468         }
7469         my $refs = git_get_references();
7470
7471         my $commit_hash = $base;
7472         if (defined $parent) {
7473                 $commit_hash = "$parent..$base";
7474         }
7475         my @commitlist =
7476                 parse_commits($commit_hash, 101, (100 * $page),
7477                               defined $file_name ? ($file_name, "--full-history") : ());
7478
7479         my $ftype;
7480         if (!defined $file_hash && defined $file_name) {
7481                 # some commits could have deleted file in question,
7482                 # and not have it in tree, but one of them has to have it
7483                 for (my $i = 0; $i < @commitlist; $i++) {
7484                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7485                         last if defined $file_hash;
7486                 }
7487         }
7488         if (defined $file_hash) {
7489                 $ftype = git_get_type($file_hash);
7490         }
7491         if (defined $file_name && !defined $ftype) {
7492                 die_error(500, "Unknown type of object");
7493         }
7494         my %co;
7495         if (defined $file_name) {
7496                 %co = parse_commit($base)
7497                         or die_error(404, "Unknown commit object");
7498         }
7499
7500
7501         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7502         my $next_link = '';
7503         if ($#commitlist >= 100) {
7504                 $next_link =
7505                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7506                                  -accesskey => "n", -title => "Alt-n"}, "next");
7507         }
7508         my $patch_max = gitweb_get_feature('patches');
7509         if ($patch_max && !defined $file_name &&
7510                 !gitweb_check_feature('email-privacy')) {
7511                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7512                         $paging_nav .= " &sdot; " .
7513                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7514                                         "patches");
7515                 }
7516         }
7517
7518         git_header_html();
7519         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7520         if (defined $file_name) {
7521                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7522         } else {
7523                 git_print_header_div('summary', $project)
7524         }
7525         git_print_page_path($file_name, $ftype, $hash_base)
7526                 if (defined $file_name);
7527
7528         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7529                      $file_name, $file_hash, $ftype);
7530
7531         git_footer_html();
7532 }
7533
7534 sub git_log {
7535         git_log_generic('log', \&git_log_body,
7536                         $hash, $hash_parent);
7537 }
7538
7539 sub git_commit {
7540         $hash ||= $hash_base || "HEAD";
7541         my %co = parse_commit($hash)
7542             or die_error(404, "Unknown commit object");
7543
7544         my $parent  = $co{'parent'};
7545         my $parents = $co{'parents'}; # listref
7546
7547         # we need to prepare $formats_nav before any parameter munging
7548         my $formats_nav;
7549         if (!defined $parent) {
7550                 # --root commitdiff
7551                 $formats_nav .= '(initial)';
7552         } elsif (@$parents == 1) {
7553                 # single parent commit
7554                 $formats_nav .=
7555                         '(parent: ' .
7556                         $cgi->a({-href => href(action=>"commit",
7557                                                hash=>$parent)},
7558                                 esc_html(substr($parent, 0, 7))) .
7559                         ')';
7560         } else {
7561                 # merge commit
7562                 $formats_nav .=
7563                         '(merge: ' .
7564                         join(' ', map {
7565                                 $cgi->a({-href => href(action=>"commit",
7566                                                        hash=>$_)},
7567                                         esc_html(substr($_, 0, 7)));
7568                         } @$parents ) .
7569                         ')';
7570         }
7571         if (gitweb_check_feature('patches') && @$parents <= 1 &&
7572                 !gitweb_check_feature('email-privacy')) {
7573                 $formats_nav .= " | " .
7574                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7575                                 "patch");
7576         }
7577
7578         if (!defined $parent) {
7579                 $parent = "--root";
7580         }
7581         my @difftree;
7582         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7583                 @diff_opts,
7584                 (@$parents <= 1 ? $parent : '-c'),
7585                 $hash, "--"
7586                 or die_error(500, "Open git-diff-tree failed");
7587         @difftree = map { chomp; $_ } <$fd>;
7588         close $fd or die_error(404, "Reading git-diff-tree failed");
7589
7590         # non-textual hash id's can be cached
7591         my $expires;
7592         if ($hash =~ m/^$oid_regex$/) {
7593                 $expires = "+1d";
7594         }
7595         my $refs = git_get_references();
7596         my $ref = format_ref_marker($refs, $co{'id'});
7597
7598         git_header_html(undef, $expires);
7599         git_print_page_nav('commit', '',
7600                            $hash, $co{'tree'}, $hash,
7601                            $formats_nav);
7602
7603         if (defined $co{'parent'}) {
7604                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7605         } else {
7606                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7607         }
7608         print "<div class=\"title_text\">\n" .
7609               "<table class=\"object_header\">\n";
7610         git_print_authorship_rows(\%co);
7611         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7612         print "<tr>" .
7613               "<td>tree</td>" .
7614               "<td class=\"sha1\">" .
7615               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7616                        class => "list"}, $co{'tree'}) .
7617               "</td>" .
7618               "<td class=\"link\">" .
7619               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7620                       "tree");
7621         my $snapshot_links = format_snapshot_links($hash);
7622         if (defined $snapshot_links) {
7623                 print " | " . $snapshot_links;
7624         }
7625         print "</td>" .
7626               "</tr>\n";
7627
7628         foreach my $par (@$parents) {
7629                 print "<tr>" .
7630                       "<td>parent</td>" .
7631                       "<td class=\"sha1\">" .
7632                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7633                                class => "list"}, $par) .
7634                       "</td>" .
7635                       "<td class=\"link\">" .
7636                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7637                       " | " .
7638                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7639                       "</td>" .
7640                       "</tr>\n";
7641         }
7642         print "</table>".
7643               "</div>\n";
7644
7645         print "<div class=\"page_body\">\n";
7646         git_print_log($co{'comment'});
7647         print "</div>\n";
7648
7649         git_difftree_body(\@difftree, $hash, @$parents);
7650
7651         git_footer_html();
7652 }
7653
7654 sub git_object {
7655         # object is defined by:
7656         # - hash or hash_base alone
7657         # - hash_base and file_name
7658         my $type;
7659
7660         # - hash or hash_base alone
7661         if ($hash || ($hash_base && !defined $file_name)) {
7662                 my $object_id = $hash || $hash_base;
7663
7664                 open my $fd, "-|", quote_command(
7665                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7666                         or die_error(404, "Object does not exist");
7667                 $type = <$fd>;
7668                 defined $type && chomp $type;
7669                 close $fd
7670                         or die_error(404, "Object does not exist");
7671
7672         # - hash_base and file_name
7673         } elsif ($hash_base && defined $file_name) {
7674                 $file_name =~ s,/+$,,;
7675
7676                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7677                         or die_error(404, "Base object does not exist");
7678
7679                 # here errors should not happen
7680                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7681                         or die_error(500, "Open git-ls-tree failed");
7682                 my $line = <$fd>;
7683                 close $fd;
7684
7685                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7686                 unless ($line && $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/) {
7687                         die_error(404, "File or directory for given base does not exist");
7688                 }
7689                 $type = $2;
7690                 $hash = $3;
7691         } else {
7692                 die_error(400, "Not enough information to find object");
7693         }
7694
7695         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7696                                           hash=>$hash, hash_base=>$hash_base,
7697                                           file_name=>$file_name),
7698                              -status => '302 Found');
7699 }
7700
7701 sub git_blobdiff {
7702         my $format = shift || 'html';
7703         my $diff_style = $input_params{'diff_style'} || 'inline';
7704
7705         my $fd;
7706         my @difftree;
7707         my %diffinfo;
7708         my $expires;
7709
7710         # preparing $fd and %diffinfo for git_patchset_body
7711         # new style URI
7712         if (defined $hash_base && defined $hash_parent_base) {
7713                 if (defined $file_name) {
7714                         # read raw output
7715                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7716                                 $hash_parent_base, $hash_base,
7717                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7718                                 or die_error(500, "Open git-diff-tree failed");
7719                         @difftree = map { chomp; $_ } <$fd>;
7720                         close $fd
7721                                 or die_error(404, "Reading git-diff-tree failed");
7722                         @difftree
7723                                 or die_error(404, "Blob diff not found");
7724
7725                 } elsif (defined $hash &&
7726                          $hash =~ $oid_regex) {
7727                         # try to find filename from $hash
7728
7729                         # read filtered raw output
7730                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7731                                 $hash_parent_base, $hash_base, "--"
7732                                 or die_error(500, "Open git-diff-tree failed");
7733                         @difftree =
7734                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7735                                 # $hash == to_id
7736                                 grep { /^:[0-7]{6} [0-7]{6} $oid_regex $hash/ }
7737                                 map { chomp; $_ } <$fd>;
7738                         close $fd
7739                                 or die_error(404, "Reading git-diff-tree failed");
7740                         @difftree
7741                                 or die_error(404, "Blob diff not found");
7742
7743                 } else {
7744                         die_error(400, "Missing one of the blob diff parameters");
7745                 }
7746
7747                 if (@difftree > 1) {
7748                         die_error(400, "Ambiguous blob diff specification");
7749                 }
7750
7751                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7752                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7753                 $file_name   ||= $diffinfo{'to_file'};
7754
7755                 $hash_parent ||= $diffinfo{'from_id'};
7756                 $hash        ||= $diffinfo{'to_id'};
7757
7758                 # non-textual hash id's can be cached
7759                 if ($hash_base =~ m/^$oid_regex$/ &&
7760                     $hash_parent_base =~ m/^$oid_regex$/) {
7761                         $expires = '+1d';
7762                 }
7763
7764                 # open patch output
7765                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7766                         '-p', ($format eq 'html' ? "--full-index" : ()),
7767                         $hash_parent_base, $hash_base,
7768                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7769                         or die_error(500, "Open git-diff-tree failed");
7770         }
7771
7772         # old/legacy style URI -- not generated anymore since 1.4.3.
7773         if (!%diffinfo) {
7774                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7775         }
7776
7777         # header
7778         if ($format eq 'html') {
7779                 my $formats_nav =
7780                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7781                                 "raw");
7782                 $formats_nav .= diff_style_nav($diff_style);
7783                 git_header_html(undef, $expires);
7784                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7785                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7786                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7787                 } else {
7788                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7789                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7790                 }
7791                 if (defined $file_name) {
7792                         git_print_page_path($file_name, "blob", $hash_base);
7793                 } else {
7794                         print "<div class=\"page_path\"></div>\n";
7795                 }
7796
7797         } elsif ($format eq 'plain') {
7798                 print $cgi->header(
7799                         -type => 'text/plain',
7800                         -charset => 'utf-8',
7801                         -expires => $expires,
7802                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7803
7804                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7805
7806         } else {
7807                 die_error(400, "Unknown blobdiff format");
7808         }
7809
7810         # patch
7811         if ($format eq 'html') {
7812                 print "<div class=\"page_body\">\n";
7813
7814                 git_patchset_body($fd, $diff_style,
7815                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7816                 close $fd;
7817
7818                 print "</div>\n"; # class="page_body"
7819                 git_footer_html();
7820
7821         } else {
7822                 while (my $line = <$fd>) {
7823                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7824                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7825
7826                         print $line;
7827
7828                         last if $line =~ m!^\+\+\+!;
7829                 }
7830                 local $/ = undef;
7831                 print <$fd>;
7832                 close $fd;
7833         }
7834 }
7835
7836 sub git_blobdiff_plain {
7837         git_blobdiff('plain');
7838 }
7839
7840 # assumes that it is added as later part of already existing navigation,
7841 # so it returns "| foo | bar" rather than just "foo | bar"
7842 sub diff_style_nav {
7843         my ($diff_style, $is_combined) = @_;
7844         $diff_style ||= 'inline';
7845
7846         return "" if ($is_combined);
7847
7848         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7849         my %styles = @styles;
7850         @styles =
7851                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7852
7853         return join '',
7854                 map { " | ".$_ }
7855                 map {
7856                         $_ eq $diff_style ? $styles{$_} :
7857                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7858                 } @styles;
7859 }
7860
7861 sub git_commitdiff {
7862         my %params = @_;
7863         my $format = $params{-format} || 'html';
7864         my $diff_style = $input_params{'diff_style'} || 'inline';
7865
7866         my ($patch_max) = gitweb_get_feature('patches');
7867         if ($format eq 'patch') {
7868                 die_error(403, "Patch view not allowed") unless $patch_max;
7869         }
7870
7871         $hash ||= $hash_base || "HEAD";
7872         my %co = parse_commit($hash)
7873             or die_error(404, "Unknown commit object");
7874
7875         # choose format for commitdiff for merge
7876         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7877                 $hash_parent = '--cc';
7878         }
7879         # we need to prepare $formats_nav before almost any parameter munging
7880         my $formats_nav;
7881         if ($format eq 'html') {
7882                 $formats_nav =
7883                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7884                                 "raw");
7885                 if ($patch_max && @{$co{'parents'}} <= 1 &&
7886                         !gitweb_check_feature('email-privacy')) {
7887                         $formats_nav .= " | " .
7888                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7889                                         "patch");
7890                 }
7891                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7892
7893                 if (defined $hash_parent &&
7894                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7895                         # commitdiff with two commits given
7896                         my $hash_parent_short = $hash_parent;
7897                         if ($hash_parent =~ m/^$oid_regex$/) {
7898                                 $hash_parent_short = substr($hash_parent, 0, 7);
7899                         }
7900                         $formats_nav .=
7901                                 ' (from';
7902                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7903                                 if ($co{'parents'}[$i] eq $hash_parent) {
7904                                         $formats_nav .= ' parent ' . ($i+1);
7905                                         last;
7906                                 }
7907                         }
7908                         $formats_nav .= ': ' .
7909                                 $cgi->a({-href => href(-replay=>1,
7910                                                        hash=>$hash_parent, hash_base=>undef)},
7911                                         esc_html($hash_parent_short)) .
7912                                 ')';
7913                 } elsif (!$co{'parent'}) {
7914                         # --root commitdiff
7915                         $formats_nav .= ' (initial)';
7916                 } elsif (scalar @{$co{'parents'}} == 1) {
7917                         # single parent commit
7918                         $formats_nav .=
7919                                 ' (parent: ' .
7920                                 $cgi->a({-href => href(-replay=>1,
7921                                                        hash=>$co{'parent'}, hash_base=>undef)},
7922                                         esc_html(substr($co{'parent'}, 0, 7))) .
7923                                 ')';
7924                 } else {
7925                         # merge commit
7926                         if ($hash_parent eq '--cc') {
7927                                 $formats_nav .= ' | ' .
7928                                         $cgi->a({-href => href(-replay=>1,
7929                                                                hash=>$hash, hash_parent=>'-c')},
7930                                                 'combined');
7931                         } else { # $hash_parent eq '-c'
7932                                 $formats_nav .= ' | ' .
7933                                         $cgi->a({-href => href(-replay=>1,
7934                                                                hash=>$hash, hash_parent=>'--cc')},
7935                                                 'compact');
7936                         }
7937                         $formats_nav .=
7938                                 ' (merge: ' .
7939                                 join(' ', map {
7940                                         $cgi->a({-href => href(-replay=>1,
7941                                                                hash=>$_, hash_base=>undef)},
7942                                                 esc_html(substr($_, 0, 7)));
7943                                 } @{$co{'parents'}} ) .
7944                                 ')';
7945                 }
7946         }
7947
7948         my $hash_parent_param = $hash_parent;
7949         if (!defined $hash_parent_param) {
7950                 # --cc for multiple parents, --root for parentless
7951                 $hash_parent_param =
7952                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7953         }
7954
7955         # read commitdiff
7956         my $fd;
7957         my @difftree;
7958         if ($format eq 'html') {
7959                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7960                         "--no-commit-id", "--patch-with-raw", "--full-index",
7961                         $hash_parent_param, $hash, "--"
7962                         or die_error(500, "Open git-diff-tree failed");
7963
7964                 while (my $line = <$fd>) {
7965                         chomp $line;
7966                         # empty line ends raw part of diff-tree output
7967                         last unless $line;
7968                         push @difftree, scalar parse_difftree_raw_line($line);
7969                 }
7970
7971         } elsif ($format eq 'plain') {
7972                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7973                         '-p', $hash_parent_param, $hash, "--"
7974                         or die_error(500, "Open git-diff-tree failed");
7975         } elsif ($format eq 'patch') {
7976                 # For commit ranges, we limit the output to the number of
7977                 # patches specified in the 'patches' feature.
7978                 # For single commits, we limit the output to a single patch,
7979                 # diverging from the git-format-patch default.
7980                 my @commit_spec = ();
7981                 if ($hash_parent) {
7982                         if ($patch_max > 0) {
7983                                 push @commit_spec, "-$patch_max";
7984                         }
7985                         push @commit_spec, '-n', "$hash_parent..$hash";
7986                 } else {
7987                         if ($params{-single}) {
7988                                 push @commit_spec, '-1';
7989                         } else {
7990                                 if ($patch_max > 0) {
7991                                         push @commit_spec, "-$patch_max";
7992                                 }
7993                                 push @commit_spec, "-n";
7994                         }
7995                         push @commit_spec, '--root', $hash;
7996                 }
7997                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7998                         '--encoding=utf8', '--stdout', @commit_spec
7999                         or die_error(500, "Open git-format-patch failed");
8000         } else {
8001                 die_error(400, "Unknown commitdiff format");
8002         }
8003
8004         # non-textual hash id's can be cached
8005         my $expires;
8006         if ($hash =~ m/^$oid_regex$/) {
8007                 $expires = "+1d";
8008         }
8009
8010         # write commit message
8011         if ($format eq 'html') {
8012                 my $refs = git_get_references();
8013                 my $ref = format_ref_marker($refs, $co{'id'});
8014
8015                 git_header_html(undef, $expires);
8016                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
8017                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
8018                 print "<div class=\"title_text\">\n" .
8019                       "<table class=\"object_header\">\n";
8020                 git_print_authorship_rows(\%co);
8021                 print "</table>".
8022                       "</div>\n";
8023                 print "<div class=\"page_body\">\n";
8024                 if (@{$co{'comment'}} > 1) {
8025                         print "<div class=\"log\">\n";
8026                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
8027                         print "</div>\n"; # class="log"
8028                 }
8029
8030         } elsif ($format eq 'plain') {
8031                 my $refs = git_get_references("tags");
8032                 my $tagname = git_get_rev_name_tags($hash);
8033                 my $filename = basename($project) . "-$hash.patch";
8034
8035                 print $cgi->header(
8036                         -type => 'text/plain',
8037                         -charset => 'utf-8',
8038                         -expires => $expires,
8039                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8040                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
8041                 print "From: " . to_utf8($co{'author'}) . "\n";
8042                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
8043                 print "Subject: " . to_utf8($co{'title'}) . "\n";
8044
8045                 print "X-Git-Tag: $tagname\n" if $tagname;
8046                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8047
8048                 foreach my $line (@{$co{'comment'}}) {
8049                         print to_utf8($line) . "\n";
8050                 }
8051                 print "---\n\n";
8052         } elsif ($format eq 'patch') {
8053                 my $filename = basename($project) . "-$hash.patch";
8054
8055                 print $cgi->header(
8056                         -type => 'text/plain',
8057                         -charset => 'utf-8',
8058                         -expires => $expires,
8059                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8060         }
8061
8062         # write patch
8063         if ($format eq 'html') {
8064                 my $use_parents = !defined $hash_parent ||
8065                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8066                 git_difftree_body(\@difftree, $hash,
8067                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8068                 print "<br/>\n";
8069
8070                 git_patchset_body($fd, $diff_style,
8071                                   \@difftree, $hash,
8072                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8073                 close $fd;
8074                 print "</div>\n"; # class="page_body"
8075                 git_footer_html();
8076
8077         } elsif ($format eq 'plain') {
8078                 local $/ = undef;
8079                 print <$fd>;
8080                 close $fd
8081                         or print "Reading git-diff-tree failed\n";
8082         } elsif ($format eq 'patch') {
8083                 local $/ = undef;
8084                 print <$fd>;
8085                 close $fd
8086                         or print "Reading git-format-patch failed\n";
8087         }
8088 }
8089
8090 sub git_commitdiff_plain {
8091         git_commitdiff(-format => 'plain');
8092 }
8093
8094 # format-patch-style patches
8095 sub git_patch {
8096         git_commitdiff(-format => 'patch', -single => 1);
8097 }
8098
8099 sub git_patches {
8100         git_commitdiff(-format => 'patch');
8101 }
8102
8103 sub git_history {
8104         git_log_generic('history', \&git_history_body,
8105                         $hash_base, $hash_parent_base,
8106                         $file_name, $hash);
8107 }
8108
8109 sub git_search {
8110         $searchtype ||= 'commit';
8111
8112         # check if appropriate features are enabled
8113         gitweb_check_feature('search')
8114                 or die_error(403, "Search is disabled");
8115         if ($searchtype eq 'pickaxe') {
8116                 # pickaxe may take all resources of your box and run for several minutes
8117                 # with every query - so decide by yourself how public you make this feature
8118                 gitweb_check_feature('pickaxe')
8119                         or die_error(403, "Pickaxe search is disabled");
8120         }
8121         if ($searchtype eq 'grep') {
8122                 # grep search might be potentially CPU-intensive, too
8123                 gitweb_check_feature('grep')
8124                         or die_error(403, "Grep search is disabled");
8125         }
8126
8127         if (!defined $searchtext) {
8128                 die_error(400, "Text field is empty");
8129         }
8130         if (!defined $hash) {
8131                 $hash = git_get_head_hash($project);
8132         }
8133         my %co = parse_commit($hash);
8134         if (!%co) {
8135                 die_error(404, "Unknown commit object");
8136         }
8137         if (!defined $page) {
8138                 $page = 0;
8139         }
8140
8141         if ($searchtype eq 'commit' ||
8142             $searchtype eq 'author' ||
8143             $searchtype eq 'committer') {
8144                 git_search_message(%co);
8145         } elsif ($searchtype eq 'pickaxe') {
8146                 git_search_changes(%co);
8147         } elsif ($searchtype eq 'grep') {
8148                 git_search_files(%co);
8149         } else {
8150                 die_error(400, "Unknown search type");
8151         }
8152 }
8153
8154 sub git_search_help {
8155         git_header_html();
8156         git_print_page_nav('','', $hash,$hash,$hash);
8157         print <<EOT;
8158 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8159 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8160 the pattern entered is recognized as the POSIX extended
8161 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8162 insensitive).</p>
8163 <dl>
8164 <dt><b>commit</b></dt>
8165 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8166 EOT
8167         my $have_grep = gitweb_check_feature('grep');
8168         if ($have_grep) {
8169                 print <<EOT;
8170 <dt><b>grep</b></dt>
8171 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8172     a different one) are searched for the given pattern. On large trees, this search can take
8173 a while and put some strain on the server, so please use it with some consideration. Note that
8174 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8175 case-sensitive.</dd>
8176 EOT
8177         }
8178         print <<EOT;
8179 <dt><b>author</b></dt>
8180 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8181 <dt><b>committer</b></dt>
8182 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8183 EOT
8184         my $have_pickaxe = gitweb_check_feature('pickaxe');
8185         if ($have_pickaxe) {
8186                 print <<EOT;
8187 <dt><b>pickaxe</b></dt>
8188 <dd>All commits that caused the string to appear or disappear from any file (changes that
8189 added, removed or "modified" the string) will be listed. This search can take a while and
8190 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8191 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8192 EOT
8193         }
8194         print "</dl>\n";
8195         git_footer_html();
8196 }
8197
8198 sub git_shortlog {
8199         git_log_generic('shortlog', \&git_shortlog_body,
8200                         $hash, $hash_parent);
8201 }
8202
8203 ## ......................................................................
8204 ## feeds (RSS, Atom; OPML)
8205
8206 sub git_feed {
8207         my $format = shift || 'atom';
8208         my $have_blame = gitweb_check_feature('blame');
8209
8210         # Atom: http://www.atomenabled.org/developers/syndication/
8211         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8212         if ($format ne 'rss' && $format ne 'atom') {
8213                 die_error(400, "Unknown web feed format");
8214         }
8215
8216         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8217         my $head = $hash || 'HEAD';
8218         my @commitlist = parse_commits($head, 150, 0, $file_name);
8219
8220         my %latest_commit;
8221         my %latest_date;
8222         my $content_type = "application/$format+xml";
8223         if (defined $cgi->http('HTTP_ACCEPT') &&
8224                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8225                 # browser (feed reader) prefers text/xml
8226                 $content_type = 'text/xml';
8227         }
8228         if (defined($commitlist[0])) {
8229                 %latest_commit = %{$commitlist[0]};
8230                 my $latest_epoch = $latest_commit{'committer_epoch'};
8231                 exit_if_unmodified_since($latest_epoch);
8232                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8233         }
8234         print $cgi->header(
8235                 -type => $content_type,
8236                 -charset => 'utf-8',
8237                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8238                 -status => '200 OK');
8239
8240         # Optimization: skip generating the body if client asks only
8241         # for Last-Modified date.
8242         return if ($cgi->request_method() eq 'HEAD');
8243
8244         # header variables
8245         my $title = "$site_name - $project/$action";
8246         my $feed_type = 'log';
8247         if (defined $hash) {
8248                 $title .= " - '$hash'";
8249                 $feed_type = 'branch log';
8250                 if (defined $file_name) {
8251                         $title .= " :: $file_name";
8252                         $feed_type = 'history';
8253                 }
8254         } elsif (defined $file_name) {
8255                 $title .= " - $file_name";
8256                 $feed_type = 'history';
8257         }
8258         $title .= " $feed_type";
8259         $title = esc_html($title);
8260         my $descr = git_get_project_description($project);
8261         if (defined $descr) {
8262                 $descr = esc_html($descr);
8263         } else {
8264                 $descr = "$project " .
8265                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8266                          " feed";
8267         }
8268         my $owner = git_get_project_owner($project);
8269         $owner = esc_html($owner);
8270
8271         #header
8272         my $alt_url;
8273         if (defined $file_name) {
8274                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8275         } elsif (defined $hash) {
8276                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8277         } else {
8278                 $alt_url = href(-full=>1, action=>"summary");
8279         }
8280         $alt_url = esc_attr($alt_url);
8281         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8282         if ($format eq 'rss') {
8283                 print <<XML;
8284 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8285 <channel>
8286 XML
8287                 print "<title>$title</title>\n" .
8288                       "<link>$alt_url</link>\n" .
8289                       "<description>$descr</description>\n" .
8290                       "<language>en</language>\n" .
8291                       # project owner is responsible for 'editorial' content
8292                       "<managingEditor>$owner</managingEditor>\n";
8293                 if (defined $logo || defined $favicon) {
8294                         # prefer the logo to the favicon, since RSS
8295                         # doesn't allow both
8296                         my $img = esc_url($logo || $favicon);
8297                         print "<image>\n" .
8298                               "<url>$img</url>\n" .
8299                               "<title>$title</title>\n" .
8300                               "<link>$alt_url</link>\n" .
8301                               "</image>\n";
8302                 }
8303                 if (%latest_date) {
8304                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8305                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8306                 }
8307                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8308         } elsif ($format eq 'atom') {
8309                 print <<XML;
8310 <feed xmlns="http://www.w3.org/2005/Atom">
8311 XML
8312                 print "<title>$title</title>\n" .
8313                       "<subtitle>$descr</subtitle>\n" .
8314                       '<link rel="alternate" type="text/html" href="' .
8315                       $alt_url . '" />' . "\n" .
8316                       '<link rel="self" type="' . $content_type . '" href="' .
8317                       $cgi->self_url() . '" />' . "\n" .
8318                       "<id>" . esc_url(href(-full=>1)) . "</id>\n" .
8319                       # use project owner for feed author
8320                       "<author><name>$owner</name></author>\n";
8321                 if (defined $favicon) {
8322                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8323                 }
8324                 if (defined $logo) {
8325                         # not twice as wide as tall: 72 x 27 pixels
8326                         print "<logo>" . esc_url($logo) . "</logo>\n";
8327                 }
8328                 if (! %latest_date) {
8329                         # dummy date to keep the feed valid until commits trickle in:
8330                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8331                 } else {
8332                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8333                 }
8334                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8335         }
8336
8337         # contents
8338         for (my $i = 0; $i <= $#commitlist; $i++) {
8339                 my %co = %{$commitlist[$i]};
8340                 my $commit = $co{'id'};
8341                 # we read 150, we always show 30 and the ones more recent than 48 hours
8342                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8343                         last;
8344                 }
8345                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8346
8347                 # get list of changed files
8348                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8349                         $co{'parent'} || "--root",
8350                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8351                         or next;
8352                 my @difftree = map { chomp; $_ } <$fd>;
8353                 close $fd
8354                         or next;
8355
8356                 # print element (entry, item)
8357                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8358                 if ($format eq 'rss') {
8359                         print "<item>\n" .
8360                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8361                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8362                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8363                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8364                               "<link>" . esc_html($co_url) . "</link>\n" .
8365                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8366                               "<content:encoded>" .
8367                               "<![CDATA[\n";
8368                 } elsif ($format eq 'atom') {
8369                         print "<entry>\n" .
8370                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8371                               "<updated>$cd{'iso-8601'}</updated>\n" .
8372                               "<author>\n" .
8373                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8374                         if ($co{'author_email'}) {
8375                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8376                         }
8377                         print "</author>\n" .
8378                               # use committer for contributor
8379                               "<contributor>\n" .
8380                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8381                         if ($co{'committer_email'}) {
8382                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8383                         }
8384                         print "</contributor>\n" .
8385                               "<published>$cd{'iso-8601'}</published>\n" .
8386                               "<link rel=\"alternate\" type=\"text/html\" href=\"" . esc_attr($co_url) . "\" />\n" .
8387                               "<id>" . esc_html($co_url) . "</id>\n" .
8388                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8389                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8390                 }
8391                 my $comment = $co{'comment'};
8392                 print "<pre>\n";
8393                 foreach my $line (@$comment) {
8394                         $line = esc_html($line);
8395                         print "$line\n";
8396                 }
8397                 print "</pre><ul>\n";
8398                 foreach my $difftree_line (@difftree) {
8399                         my %difftree = parse_difftree_raw_line($difftree_line);
8400                         next if !$difftree{'from_id'};
8401
8402                         my $file = $difftree{'file'} || $difftree{'to_file'};
8403
8404                         print "<li>" .
8405                               "[" .
8406                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8407                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8408                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8409                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8410                                       -title => "diff"}, 'D');
8411                         if ($have_blame) {
8412                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8413                                                              file_name=>$file, hash_base=>$commit),
8414                                               -title => "blame"}, 'B');
8415                         }
8416                         # if this is not a feed of a file history
8417                         if (!defined $file_name || $file_name ne $file) {
8418                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8419                                                              file_name=>$file, hash=>$commit),
8420                                               -title => "history"}, 'H');
8421                         }
8422                         $file = esc_path($file);
8423                         print "] ".
8424                               "$file</li>\n";
8425                 }
8426                 if ($format eq 'rss') {
8427                         print "</ul>]]>\n" .
8428                               "</content:encoded>\n" .
8429                               "</item>\n";
8430                 } elsif ($format eq 'atom') {
8431                         print "</ul>\n</div>\n" .
8432                               "</content>\n" .
8433                               "</entry>\n";
8434                 }
8435         }
8436
8437         # end of feed
8438         if ($format eq 'rss') {
8439                 print "</channel>\n</rss>\n";
8440         } elsif ($format eq 'atom') {
8441                 print "</feed>\n";
8442         }
8443 }
8444
8445 sub git_rss {
8446         git_feed('rss');
8447 }
8448
8449 sub git_atom {
8450         git_feed('atom');
8451 }
8452
8453 sub git_opml {
8454         my @list = git_get_projects_list($project_filter, $strict_export);
8455         if (!@list) {
8456                 die_error(404, "No projects found");
8457         }
8458
8459         print $cgi->header(
8460                 -type => 'text/xml',
8461                 -charset => 'utf-8',
8462                 -content_disposition => 'inline; filename="opml.xml"');
8463
8464         my $title = esc_html($site_name);
8465         my $filter = " within subdirectory ";
8466         if (defined $project_filter) {
8467                 $filter .= esc_html($project_filter);
8468         } else {
8469                 $filter = "";
8470         }
8471         print <<XML;
8472 <?xml version="1.0" encoding="utf-8"?>
8473 <opml version="1.0">
8474 <head>
8475   <title>$title OPML Export$filter</title>
8476 </head>
8477 <body>
8478 <outline text="git RSS feeds">
8479 XML
8480
8481         foreach my $pr (@list) {
8482                 my %proj = %$pr;
8483                 my $head = git_get_head_hash($proj{'path'});
8484                 if (!defined $head) {
8485                         next;
8486                 }
8487                 $git_dir = "$projectroot/$proj{'path'}";
8488                 my %co = parse_commit($head);
8489                 if (!%co) {
8490                         next;
8491                 }
8492
8493                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8494                 my $rss  = esc_attr(href('project' => $proj{'path'}, 'action' => 'rss', -full => 1));
8495                 my $html = esc_attr(href('project' => $proj{'path'}, 'action' => 'summary', -full => 1));
8496                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8497         }
8498         print <<XML;
8499 </outline>
8500 </body>
8501 </opml>
8502 XML
8503 }