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 strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95 # URI of GIT logo (72x27 size)
  96 our $logo = "++GITWEB_LOGO++";
  97 # URI of GIT favicon, assumed to be image/png type
  98 our $favicon = "++GITWEB_FAVICON++";
  99
 100 # URI and label (title) of GIT logo link
 101 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 102 #our $logo_label = "git documentation";
 103 our $logo_url = "http://git-scm.com/";
 104 our $logo_label = "git homepage";
 105
 106 # source of projects list
 107 our $projects_list = "++GITWEB_LIST++";
 108
 109 # the width (in characters) of the projects list "Description" column
 110 our $projects_list_description_width = 25;
 111
 112 # default order of projects list
 113 # valid values are none, project, descr, owner, and age
 114 our $default_projects_order = "project";
 115
 116 # show repository only if this file exists
 117 # (only effective if this variable evaluates to true)
 118 our $export_ok = "++GITWEB_EXPORT_OK++";
 119
 120 # show repository only if this subroutine returns true
 121 # when given the path to the project, for example:
 122 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 123 our $export_auth_hook = undef;
 124
 125 # only allow viewing of repositories also shown on the overview page
 126 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 127
 128 # list of git base URLs used for URL to where fetch project from,
 129 # i.e. full URL is "$git_base_url/$project"
 130 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 131
 132 # default blob_plain mimetype and default charset for text/plain blob
 133 our $default_blob_plain_mimetype = 'text/plain';
 134 our $default_text_plain_charset  = undef;
 135
 136 # file to use for guessing MIME types before trying /etc/mime.types
 137 # (relative to the current git repository)
 138 our $mimetypes_file = undef;
 139
 140 # assume this charset if line contains non-UTF-8 characters;
 141 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 142 # for which encoding all byte sequences are valid, for example
 143 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 144 # could be even 'utf-8' for the old behavior)
 145 our $fallback_encoding = 'latin1';
 146
 147 # rename detection options for git-diff and git-diff-tree
 148 # - default is '-M', with the cost proportional to
 149 #   (number of removed files) * (number of new files).
 150 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 151 #   (number of changed files + number of removed files) * (number of new files)
 152 # - even more costly is '-C', '--find-copies-harder' with cost
 153 #   (number of files in the original tree) * (number of new files)
 154 # - one might want to include '-B' option, e.g. '-B', '-M'
 155 our @diff_opts = ('-M'); # taken from git_commit
 156
 157 # Disables features that would allow repository owners to inject script into
 158 # the gitweb domain.
 159 our $prevent_xss = 0;
 160
 161 # information about snapshot formats that gitweb is capable of serving
 162 our %known_snapshot_formats = (
 163         # name => {
 164         #       'display' => display name,
 165         #       'type' => mime type,
 166         #       'suffix' => filename suffix,
 167         #       'format' => --format for git-archive,
 168         #       'compressor' => [compressor command and arguments]
 169         #                       (array reference, optional)}
 170         #
 171         'tgz' => {
 172                 'display' => 'tar.gz',
 173                 'type' => 'application/x-gzip',
 174                 'suffix' => '.tar.gz',
 175                 'format' => 'tar',
 176                 'compressor' => ['gzip']},
 177
 178         'tbz2' => {
 179                 'display' => 'tar.bz2',
 180                 'type' => 'application/x-bzip2',
 181                 'suffix' => '.tar.bz2',
 182                 'format' => 'tar',
 183                 'compressor' => ['bzip2']},
 184
 185         'zip' => {
 186                 'display' => 'zip',
 187                 'type' => 'application/x-zip',
 188                 'suffix' => '.zip',
 189                 'format' => 'zip'},
 190 );
 191
 192 # Aliases so we understand old gitweb.snapshot values in repository
 193 # configuration.
 194 our %known_snapshot_format_aliases = (
 195         'gzip'  => 'tgz',
 196         'bzip2' => 'tbz2',
 197
 198         # backward compatibility: legacy gitweb config support
 199         'x-gzip' => undef, 'gz' => undef,
 200         'x-bzip2' => undef, 'bz2' => undef,
 201         'x-zip' => undef, '' => undef,
 202 );
 203
 204 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 205 # are changed, it may be appropriate to change these values too via
 206 # $GITWEB_CONFIG.
 207 our %avatar_size = (
 208         'default' => 16,
 209         'double'  => 32
 210 );
 211
 212 # You define site-wide feature defaults here; override them with
 213 # $GITWEB_CONFIG as necessary.
 214 our %feature = (
 215         # feature => {
 216         #       'sub' => feature-sub (subroutine),
 217         #       'override' => allow-override (boolean),
 218         #       'default' => [ default options...] (array reference)}
 219         #
 220         # if feature is overridable (it means that allow-override has true value),
 221         # then feature-sub will be called with default options as parameters;
 222         # return value of feature-sub indicates if to enable specified feature
 223         #
 224         # if there is no 'sub' key (no feature-sub), then feature cannot be
 225         # overriden
 226         #
 227         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 228         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 229         # is enabled
 230
 231         # Enable the 'blame' blob view, showing the last commit that modified
 232         # each line in the file. This can be very CPU-intensive.
 233
 234         # To enable system wide have in $GITWEB_CONFIG
 235         # $feature{'blame'}{'default'} = [1];
 236         # To have project specific config enable override in $GITWEB_CONFIG
 237         # $feature{'blame'}{'override'} = 1;
 238         # and in project config gitweb.blame = 0|1;
 239         'blame' => {
 240                 'sub' => sub { feature_bool('blame', @_) },
 241                 'override' => 0,
 242                 'default' => [0]},
 243
 244         # Enable the 'snapshot' link, providing a compressed archive of any
 245         # tree. This can potentially generate high traffic if you have large
 246         # project.
 247
 248         # Value is a list of formats defined in %known_snapshot_formats that
 249         # you wish to offer.
 250         # To disable system wide have in $GITWEB_CONFIG
 251         # $feature{'snapshot'}{'default'} = [];
 252         # To have project specific config enable override in $GITWEB_CONFIG
 253         # $feature{'snapshot'}{'override'} = 1;
 254         # and in project config, a comma-separated list of formats or "none"
 255         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 256         'snapshot' => {
 257                 'sub' => \&feature_snapshot,
 258                 'override' => 0,
 259                 'default' => ['tgz']},
 260
 261         # Enable text search, which will list the commits which match author,
 262         # committer or commit text to a given string.  Enabled by default.
 263         # Project specific override is not supported.
 264         'search' => {
 265                 'override' => 0,
 266                 'default' => [1]},
 267
 268         # Enable grep search, which will list the files in currently selected
 269         # tree containing the given string. Enabled by default. This can be
 270         # potentially CPU-intensive, of course.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'grep'}{'default'} = [1];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'grep'}{'override'} = 1;
 276         # and in project config gitweb.grep = 0|1;
 277         'grep' => {
 278                 'sub' => sub { feature_bool('grep', @_) },
 279                 'override' => 0,
 280                 'default' => [1]},
 281
 282         # Enable the pickaxe search, which will list the commits that modified
 283         # a given string in a file. This can be practical and quite faster
 284         # alternative to 'blame', but still potentially CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'pickaxe'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'pickaxe'}{'override'} = 1;
 290         # and in project config gitweb.pickaxe = 0|1;
 291         'pickaxe' => {
 292                 'sub' => sub { feature_bool('pickaxe', @_) },
 293                 'override' => 0,
 294                 'default' => [1]},
 295
 296         # Make gitweb use an alternative format of the URLs which can be
 297         # more readable and natural-looking: project name is embedded
 298         # directly in the path and the query string contains other
 299         # auxiliary information. All gitweb installations recognize
 300         # URL in either format; this configures in which formats gitweb
 301         # generates links.
 302
 303         # To enable system wide have in $GITWEB_CONFIG
 304         # $feature{'pathinfo'}{'default'} = [1];
 305         # Project specific override is not supported.
 306
 307         # Note that you will need to change the default location of CSS,
 308         # favicon, logo and possibly other files to an absolute URL. Also,
 309         # if gitweb.cgi serves as your indexfile, you will need to force
 310         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 311         'pathinfo' => {
 312                 'override' => 0,
 313                 'default' => [0]},
 314
 315         # Make gitweb consider projects in project root subdirectories
 316         # to be forks of existing projects. Given project $projname.git,
 317         # projects matching $projname/*.git will not be shown in the main
 318         # projects list, instead a '+' mark will be added to $projname
 319         # there and a 'forks' view will be enabled for the project, listing
 320         # all the forks. If project list is taken from a file, forks have
 321         # to be listed after the main project.
 322
 323         # To enable system wide have in $GITWEB_CONFIG
 324         # $feature{'forks'}{'default'} = [1];
 325         # Project specific override is not supported.
 326         'forks' => {
 327                 'override' => 0,
 328                 'default' => [0]},
 329
 330         # Insert custom links to the action bar of all project pages.
 331         # This enables you mainly to link to third-party scripts integrating
 332         # into gitweb; e.g. git-browser for graphical history representation
 333         # or custom web-based repository administration interface.
 334
 335         # The 'default' value consists of a list of triplets in the form
 336         # (label, link, position) where position is the label after which
 337         # to insert the link and link is a format string where %n expands
 338         # to the project name, %f to the project path within the filesystem,
 339         # %h to the current hash (h gitweb parameter) and %b to the current
 340         # hash base (hb gitweb parameter); %% expands to %.
 341
 342         # To enable system wide have in $GITWEB_CONFIG e.g.
 343         # $feature{'actions'}{'default'} = [('graphiclog',
 344         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 345         # Project specific override is not supported.
 346         'actions' => {
 347                 'override' => 0,
 348                 'default' => []},
 349
 350         # Allow gitweb scan project content tags described in ctags/
 351         # of project repository, and display the popular Web 2.0-ish
 352         # "tag cloud" near the project list. Note that this is something
 353         # COMPLETELY different from the normal Git tags.
 354
 355         # gitweb by itself can show existing tags, but it does not handle
 356         # tagging itself; you need an external application for that.
 357         # For an example script, check Girocco's cgi/tagproj.cgi.
 358         # You may want to install the HTML::TagCloud Perl module to get
 359         # a pretty tag cloud instead of just a list of tags.
 360
 361         # To enable system wide have in $GITWEB_CONFIG
 362         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 363         # Project specific override is not supported.
 364         'ctags' => {
 365                 'override' => 0,
 366                 'default' => [0]},
 367
 368         # The maximum number of patches in a patchset generated in patch
 369         # view. Set this to 0 or undef to disable patch view, or to a
 370         # negative number to remove any limit.
 371
 372         # To disable system wide have in $GITWEB_CONFIG
 373         # $feature{'patches'}{'default'} = [0];
 374         # To have project specific config enable override in $GITWEB_CONFIG
 375         # $feature{'patches'}{'override'} = 1;
 376         # and in project config gitweb.patches = 0|n;
 377         # where n is the maximum number of patches allowed in a patchset.
 378         'patches' => {
 379                 'sub' => \&feature_patches,
 380                 'override' => 0,
 381                 'default' => [16]},
 382
 383         # Avatar support. When this feature is enabled, views such as
 384         # shortlog or commit will display an avatar associated with
 385         # the email of the committer(s) and/or author(s).
 386
 387         # Currently available providers are gravatar and picon.
 388         # If an unknown provider is specified, the feature is disabled.
 389
 390         # Gravatar depends on Digest::MD5.
 391         # Picon currently relies on the indiana.edu database.
 392
 393         # To enable system wide have in $GITWEB_CONFIG
 394         # $feature{'avatar'}{'default'} = ['<provider>'];
 395         # where <provider> is either gravatar or picon.
 396         # To have project specific config enable override in $GITWEB_CONFIG
 397         # $feature{'avatar'}{'override'} = 1;
 398         # and in project config gitweb.avatar = <provider>;
 399         'avatar' => {
 400                 'sub' => \&feature_avatar,
 401                 'override' => 0,
 402                 'default' => ['']},
 403
 404         # Enable displaying how much time and how many git commands
 405         # it took to generate and display page.  Disabled by default.
 406         # Project specific override is not supported.
 407         'timed' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410 );
 411
 412 sub gitweb_get_feature {
 413         my ($name) = @_;
 414         return unless exists $feature{$name};
 415         my ($sub, $override, @defaults) = (
 416                 $feature{$name}{'sub'},
 417                 $feature{$name}{'override'},
 418                 @{$feature{$name}{'default'}});
 419         if (!$override) { return @defaults; }
 420         if (!defined $sub) {
 421                 warn "feature $name is not overrideable";
 422                 return @defaults;
 423         }
 424         return $sub->(@defaults);
 425 }
 426
 427 # A wrapper to check if a given feature is enabled.
 428 # With this, you can say
 429 #
 430 #   my $bool_feat = gitweb_check_feature('bool_feat');
 431 #   gitweb_check_feature('bool_feat') or somecode;
 432 #
 433 # instead of
 434 #
 435 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 436 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 437 #
 438 sub gitweb_check_feature {
 439         return (gitweb_get_feature(@_))[0];
 440 }
 441
 442
 443 sub feature_bool {
 444         my $key = shift;
 445         my ($val) = git_get_project_config($key, '--bool');
 446
 447         if (!defined $val) {
 448                 return ($_[0]);
 449         } elsif ($val eq 'true') {
 450                 return (1);
 451         } elsif ($val eq 'false') {
 452                 return (0);
 453         }
 454 }
 455
 456 sub feature_snapshot {
 457         my (@fmts) = @_;
 458
 459         my ($val) = git_get_project_config('snapshot');
 460
 461         if ($val) {
 462                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 463         }
 464
 465         return @fmts;
 466 }
 467
 468 sub feature_patches {
 469         my @val = (git_get_project_config('patches', '--int'));
 470
 471         if (@val) {
 472                 return @val;
 473         }
 474
 475         return ($_[0]);
 476 }
 477
 478 sub feature_avatar {
 479         my @val = (git_get_project_config('avatar'));
 480
 481         return @val ? @val : @_;
 482 }
 483
 484 # checking HEAD file with -e is fragile if the repository was
 485 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 486 # and then pruned.
 487 sub check_head_link {
 488         my ($dir) = @_;
 489         my $headfile = "$dir/HEAD";
 490         return ((-e $headfile) ||
 491                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 492 }
 493
 494 sub check_export_ok {
 495         my ($dir) = @_;
 496         return (check_head_link($dir) &&
 497                 (!$export_ok || -e "$dir/$export_ok") &&
 498                 (!$export_auth_hook || $export_auth_hook->($dir)));
 499 }
 500
 501 # process alternate names for backward compatibility
 502 # filter out unsupported (unknown) snapshot formats
 503 sub filter_snapshot_fmts {
 504         my @fmts = @_;
 505
 506         @fmts = map {
 507                 exists $known_snapshot_format_aliases{$_} ?
 508                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 509         @fmts = grep {
 510                 exists $known_snapshot_formats{$_} } @fmts;
 511 }
 512
 513 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 514 if (-e $GITWEB_CONFIG) {
 515         do $GITWEB_CONFIG;
 516 } else {
 517         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 518         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 519 }
 520
 521 # version of the core git binary
 522 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 523 $number_of_git_cmds++;
 524
 525 $projects_list ||= $projectroot;
 526
 527 # ======================================================================
 528 # input validation and dispatch
 529
 530 # input parameters can be collected from a variety of sources (presently, CGI
 531 # and PATH_INFO), so we define an %input_params hash that collects them all
 532 # together during validation: this allows subsequent uses (e.g. href()) to be
 533 # agnostic of the parameter origin
 534
 535 our %input_params = ();
 536
 537 # input parameters are stored with the long parameter name as key. This will
 538 # also be used in the href subroutine to convert parameters to their CGI
 539 # equivalent, and since the href() usage is the most frequent one, we store
 540 # the name -> CGI key mapping here, instead of the reverse.
 541 #
 542 # XXX: Warning: If you touch this, check the search form for updating,
 543 # too.
 544
 545 our @cgi_param_mapping = (
 546         project => "p",
 547         action => "a",
 548         file_name => "f",
 549         file_parent => "fp",
 550         hash => "h",
 551         hash_parent => "hp",
 552         hash_base => "hb",
 553         hash_parent_base => "hpb",
 554         page => "pg",
 555         order => "o",
 556         searchtext => "s",
 557         searchtype => "st",
 558         snapshot_format => "sf",
 559         extra_options => "opt",
 560         search_use_regexp => "sr",
 561 );
 562 our %cgi_param_mapping = @cgi_param_mapping;
 563
 564 # we will also need to know the possible actions, for validation
 565 our %actions = (
 566         "blame" => \&git_blame,
 567         "blobdiff" => \&git_blobdiff,
 568         "blobdiff_plain" => \&git_blobdiff_plain,
 569         "blob" => \&git_blob,
 570         "blob_plain" => \&git_blob_plain,
 571         "commitdiff" => \&git_commitdiff,
 572         "commitdiff_plain" => \&git_commitdiff_plain,
 573         "commit" => \&git_commit,
 574         "forks" => \&git_forks,
 575         "heads" => \&git_heads,
 576         "history" => \&git_history,
 577         "log" => \&git_log,
 578         "patch" => \&git_patch,
 579         "patches" => \&git_patches,
 580         "rss" => \&git_rss,
 581         "atom" => \&git_atom,
 582         "search" => \&git_search,
 583         "search_help" => \&git_search_help,
 584         "shortlog" => \&git_shortlog,
 585         "summary" => \&git_summary,
 586         "tag" => \&git_tag,
 587         "tags" => \&git_tags,
 588         "tree" => \&git_tree,
 589         "snapshot" => \&git_snapshot,
 590         "object" => \&git_object,
 591         # those below don't need $project
 592         "opml" => \&git_opml,
 593         "project_list" => \&git_project_list,
 594         "project_index" => \&git_project_index,
 595 );
 596
 597 # finally, we have the hash of allowed extra_options for the commands that
 598 # allow them
 599 our %allowed_options = (
 600         "--no-merges" => [ qw(rss atom log shortlog history) ],
 601 );
 602
 603 # fill %input_params with the CGI parameters. All values except for 'opt'
 604 # should be single values, but opt can be an array. We should probably
 605 # build an array of parameters that can be multi-valued, but since for the time
 606 # being it's only this one, we just single it out
 607 while (my ($name, $symbol) = each %cgi_param_mapping) {
 608         if ($symbol eq 'opt') {
 609                 $input_params{$name} = [ $cgi->param($symbol) ];
 610         } else {
 611                 $input_params{$name} = $cgi->param($symbol);
 612         }
 613 }
 614
 615 # now read PATH_INFO and update the parameter list for missing parameters
 616 sub evaluate_path_info {
 617         return if defined $input_params{'project'};
 618         return if !$path_info;
 619         $path_info =~ s,^/+,,;
 620         return if !$path_info;
 621
 622         # find which part of PATH_INFO is project
 623         my $project = $path_info;
 624         $project =~ s,/+$,,;
 625         while ($project && !check_head_link("$projectroot/$project")) {
 626                 $project =~ s,/*[^/]*$,,;
 627         }
 628         return unless $project;
 629         $input_params{'project'} = $project;
 630
 631         # do not change any parameters if an action is given using the query string
 632         return if $input_params{'action'};
 633         $path_info =~ s,^\Q$project\E/*,,;
 634
 635         # next, check if we have an action
 636         my $action = $path_info;
 637         $action =~ s,/.*$,,;
 638         if (exists $actions{$action}) {
 639                 $path_info =~ s,^$action/*,,;
 640                 $input_params{'action'} = $action;
 641         }
 642
 643         # list of actions that want hash_base instead of hash, but can have no
 644         # pathname (f) parameter
 645         my @wants_base = (
 646                 'tree',
 647                 'history',
 648         );
 649
 650         # we want to catch
 651         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 652         my ($parentrefname, $parentpathname, $refname, $pathname) =
 653                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 654
 655         # first, analyze the 'current' part
 656         if (defined $pathname) {
 657                 # we got "branch:filename" or "branch:dir/"
 658                 # we could use git_get_type(branch:pathname), but:
 659                 # - it needs $git_dir
 660                 # - it does a git() call
 661                 # - the convention of terminating directories with a slash
 662                 #   makes it superfluous
 663                 # - embedding the action in the PATH_INFO would make it even
 664                 #   more superfluous
 665                 $pathname =~ s,^/+,,;
 666                 if (!$pathname || substr($pathname, -1) eq "/") {
 667                         $input_params{'action'} ||= "tree";
 668                         $pathname =~ s,/$,,;
 669                 } else {
 670                         # the default action depends on whether we had parent info
 671                         # or not
 672                         if ($parentrefname) {
 673                                 $input_params{'action'} ||= "blobdiff_plain";
 674                         } else {
 675                                 $input_params{'action'} ||= "blob_plain";
 676                         }
 677                 }
 678                 $input_params{'hash_base'} ||= $refname;
 679                 $input_params{'file_name'} ||= $pathname;
 680         } elsif (defined $refname) {
 681                 # we got "branch". In this case we have to choose if we have to
 682                 # set hash or hash_base.
 683                 #
 684                 # Most of the actions without a pathname only want hash to be
 685                 # set, except for the ones specified in @wants_base that want
 686                 # hash_base instead. It should also be noted that hand-crafted
 687                 # links having 'history' as an action and no pathname or hash
 688                 # set will fail, but that happens regardless of PATH_INFO.
 689                 $input_params{'action'} ||= "shortlog";
 690                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 691                         $input_params{'hash_base'} ||= $refname;
 692                 } else {
 693                         $input_params{'hash'} ||= $refname;
 694                 }
 695         }
 696
 697         # next, handle the 'parent' part, if present
 698         if (defined $parentrefname) {
 699                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 700                 # someproject/blobdiff/oldrev..newrev:/filename
 701                 if ($parentpathname) {
 702                         $parentpathname =~ s,^/+,,;
 703                         $parentpathname =~ s,/$,,;
 704                         $input_params{'file_parent'} ||= $parentpathname;
 705                 } else {
 706                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 707                 }
 708                 # we assume that hash_parent_base is wanted if a path was specified,
 709                 # or if the action wants hash_base instead of hash
 710                 if (defined $input_params{'file_parent'} ||
 711                         grep { $_ eq $input_params{'action'} } @wants_base) {
 712                         $input_params{'hash_parent_base'} ||= $parentrefname;
 713                 } else {
 714                         $input_params{'hash_parent'} ||= $parentrefname;
 715                 }
 716         }
 717
 718         # for the snapshot action, we allow URLs in the form
 719         # $project/snapshot/$hash.ext
 720         # where .ext determines the snapshot and gets removed from the
 721         # passed $refname to provide the $hash.
 722         #
 723         # To be able to tell that $refname includes the format extension, we
 724         # require the following two conditions to be satisfied:
 725         # - the hash input parameter MUST have been set from the $refname part
 726         #   of the URL (i.e. they must be equal)
 727         # - the snapshot format MUST NOT have been defined already (e.g. from
 728         #   CGI parameter sf)
 729         # It's also useless to try any matching unless $refname has a dot,
 730         # so we check for that too
 731         if (defined $input_params{'action'} &&
 732                 $input_params{'action'} eq 'snapshot' &&
 733                 defined $refname && index($refname, '.') != -1 &&
 734                 $refname eq $input_params{'hash'} &&
 735                 !defined $input_params{'snapshot_format'}) {
 736                 # We loop over the known snapshot formats, checking for
 737                 # extensions. Allowed extensions are both the defined suffix
 738                 # (which includes the initial dot already) and the snapshot
 739                 # format key itself, with a prepended dot
 740                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 741                         my $hash = $refname;
 742                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 743                                 next;
 744                         }
 745                         my $sfx = $1;
 746                         # a valid suffix was found, so set the snapshot format
 747                         # and reset the hash parameter
 748                         $input_params{'snapshot_format'} = $fmt;
 749                         $input_params{'hash'} = $hash;
 750                         # we also set the format suffix to the one requested
 751                         # in the URL: this way a request for e.g. .tgz returns
 752                         # a .tgz instead of a .tar.gz
 753                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 754                         last;
 755                 }
 756         }
 757 }
 758 evaluate_path_info();
 759
 760 our $action = $input_params{'action'};
 761 if (defined $action) {
 762         if (!validate_action($action)) {
 763                 die_error(400, "Invalid action parameter");
 764         }
 765 }
 766
 767 # parameters which are pathnames
 768 our $project = $input_params{'project'};
 769 if (defined $project) {
 770         if (!validate_project($project)) {
 771                 undef $project;
 772                 die_error(404, "No such project");
 773         }
 774 }
 775
 776 our $file_name = $input_params{'file_name'};
 777 if (defined $file_name) {
 778         if (!validate_pathname($file_name)) {
 779                 die_error(400, "Invalid file parameter");
 780         }
 781 }
 782
 783 our $file_parent = $input_params{'file_parent'};
 784 if (defined $file_parent) {
 785         if (!validate_pathname($file_parent)) {
 786                 die_error(400, "Invalid file parent parameter");
 787         }
 788 }
 789
 790 # parameters which are refnames
 791 our $hash = $input_params{'hash'};
 792 if (defined $hash) {
 793         if (!validate_refname($hash)) {
 794                 die_error(400, "Invalid hash parameter");
 795         }
 796 }
 797
 798 our $hash_parent = $input_params{'hash_parent'};
 799 if (defined $hash_parent) {
 800         if (!validate_refname($hash_parent)) {
 801                 die_error(400, "Invalid hash parent parameter");
 802         }
 803 }
 804
 805 our $hash_base = $input_params{'hash_base'};
 806 if (defined $hash_base) {
 807         if (!validate_refname($hash_base)) {
 808                 die_error(400, "Invalid hash base parameter");
 809         }
 810 }
 811
 812 our @extra_options = @{$input_params{'extra_options'}};
 813 # @extra_options is always defined, since it can only be (currently) set from
 814 # CGI, and $cgi->param() returns the empty array in array context if the param
 815 # is not set
 816 foreach my $opt (@extra_options) {
 817         if (not exists $allowed_options{$opt}) {
 818                 die_error(400, "Invalid option parameter");
 819         }
 820         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 821                 die_error(400, "Invalid option parameter for this action");
 822         }
 823 }
 824
 825 our $hash_parent_base = $input_params{'hash_parent_base'};
 826 if (defined $hash_parent_base) {
 827         if (!validate_refname($hash_parent_base)) {
 828                 die_error(400, "Invalid hash parent base parameter");
 829         }
 830 }
 831
 832 # other parameters
 833 our $page = $input_params{'page'};
 834 if (defined $page) {
 835         if ($page =~ m/[^0-9]/) {
 836                 die_error(400, "Invalid page parameter");
 837         }
 838 }
 839
 840 our $searchtype = $input_params{'searchtype'};
 841 if (defined $searchtype) {
 842         if ($searchtype =~ m/[^a-z]/) {
 843                 die_error(400, "Invalid searchtype parameter");
 844         }
 845 }
 846
 847 our $search_use_regexp = $input_params{'search_use_regexp'};
 848
 849 our $searchtext = $input_params{'searchtext'};
 850 our $search_regexp;
 851 if (defined $searchtext) {
 852         if (length($searchtext) < 2) {
 853                 die_error(403, "At least two characters are required for search parameter");
 854         }
 855         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 856 }
 857
 858 # path to the current git repository
 859 our $git_dir;
 860 $git_dir = "$projectroot/$project" if $project;
 861
 862 # list of supported snapshot formats
 863 our @snapshot_fmts = gitweb_get_feature('snapshot');
 864 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 865
 866 # check that the avatar feature is set to a known provider name,
 867 # and for each provider check if the dependencies are satisfied.
 868 # if the provider name is invalid or the dependencies are not met,
 869 # reset $git_avatar to the empty string.
 870 our ($git_avatar) = gitweb_get_feature('avatar');
 871 if ($git_avatar eq 'gravatar') {
 872         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 873 } elsif ($git_avatar eq 'picon') {
 874         # no dependencies
 875 } else {
 876         $git_avatar = '';
 877 }
 878
 879 # dispatch
 880 if (!defined $action) {
 881         if (defined $hash) {
 882                 $action = git_get_type($hash);
 883         } elsif (defined $hash_base && defined $file_name) {
 884                 $action = git_get_type("$hash_base:$file_name");
 885         } elsif (defined $project) {
 886                 $action = 'summary';
 887         } else {
 888                 $action = 'project_list';
 889         }
 890 }
 891 if (!defined($actions{$action})) {
 892         die_error(400, "Unknown action");
 893 }
 894 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 895     !$project) {
 896         die_error(400, "Project needed");
 897 }
 898 $actions{$action}->();
 899 exit;
 900
 901 ## ======================================================================
 902 ## action links
 903
 904 sub href {
 905         my %params = @_;
 906         # default is to use -absolute url() i.e. $my_uri
 907         my $href = $params{-full} ? $my_url : $my_uri;
 908
 909         $params{'project'} = $project unless exists $params{'project'};
 910
 911         if ($params{-replay}) {
 912                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 913                         if (!exists $params{$name}) {
 914                                 $params{$name} = $input_params{$name};
 915                         }
 916                 }
 917         }
 918
 919         my $use_pathinfo = gitweb_check_feature('pathinfo');
 920         if ($use_pathinfo and defined $params{'project'}) {
 921                 # try to put as many parameters as possible in PATH_INFO:
 922                 #   - project name
 923                 #   - action
 924                 #   - hash_parent or hash_parent_base:/file_parent
 925                 #   - hash or hash_base:/filename
 926                 #   - the snapshot_format as an appropriate suffix
 927
 928                 # When the script is the root DirectoryIndex for the domain,
 929                 # $href here would be something like http://gitweb.example.com/
 930                 # Thus, we strip any trailing / from $href, to spare us double
 931                 # slashes in the final URL
 932                 $href =~ s,/$,,;
 933
 934                 # Then add the project name, if present
 935                 $href .= "/".esc_url($params{'project'});
 936                 delete $params{'project'};
 937
 938                 # since we destructively absorb parameters, we keep this
 939                 # boolean that remembers if we're handling a snapshot
 940                 my $is_snapshot = $params{'action'} eq 'snapshot';
 941
 942                 # Summary just uses the project path URL, any other action is
 943                 # added to the URL
 944                 if (defined $params{'action'}) {
 945                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 946                         delete $params{'action'};
 947                 }
 948
 949                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 950                 # stripping nonexistent or useless pieces
 951                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 952                         || $params{'hash_parent'} || $params{'hash'});
 953                 if (defined $params{'hash_base'}) {
 954                         if (defined $params{'hash_parent_base'}) {
 955                                 $href .= esc_url($params{'hash_parent_base'});
 956                                 # skip the file_parent if it's the same as the file_name
 957                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 958                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 959                                         $href .= ":/".esc_url($params{'file_parent'});
 960                                         delete $params{'file_parent'};
 961                                 }
 962                                 $href .= "..";
 963                                 delete $params{'hash_parent'};
 964                                 delete $params{'hash_parent_base'};
 965                         } elsif (defined $params{'hash_parent'}) {
 966                                 $href .= esc_url($params{'hash_parent'}). "..";
 967                                 delete $params{'hash_parent'};
 968                         }
 969
 970                         $href .= esc_url($params{'hash_base'});
 971                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 972                                 $href .= ":/".esc_url($params{'file_name'});
 973                                 delete $params{'file_name'};
 974                         }
 975                         delete $params{'hash'};
 976                         delete $params{'hash_base'};
 977                 } elsif (defined $params{'hash'}) {
 978                         $href .= esc_url($params{'hash'});
 979                         delete $params{'hash'};
 980                 }
 981
 982                 # If the action was a snapshot, we can absorb the
 983                 # snapshot_format parameter too
 984                 if ($is_snapshot) {
 985                         my $fmt = $params{'snapshot_format'};
 986                         # snapshot_format should always be defined when href()
 987                         # is called, but just in case some code forgets, we
 988                         # fall back to the default
 989                         $fmt ||= $snapshot_fmts[0];
 990                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 991                         delete $params{'snapshot_format'};
 992                 }
 993         }
 994
 995         # now encode the parameters explicitly
 996         my @result = ();
 997         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 998                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 999                 if (defined $params{$name}) {
1000                         if (ref($params{$name}) eq "ARRAY") {
1001                                 foreach my $par (@{$params{$name}}) {
1002                                         push @result, $symbol . "=" . esc_param($par);
1003                                 }
1004                         } else {
1005                                 push @result, $symbol . "=" . esc_param($params{$name});
1006                         }
1007                 }
1008         }
1009         $href .= "?" . join(';', @result) if scalar @result;
1010
1011         return $href;
1012 }
1013
1014
1015 ## ======================================================================
1016 ## validation, quoting/unquoting and escaping
1017
1018 sub validate_action {
1019         my $input = shift || return undef;
1020         return undef unless exists $actions{$input};
1021         return $input;
1022 }
1023
1024 sub validate_project {
1025         my $input = shift || return undef;
1026         if (!validate_pathname($input) ||
1027                 !(-d "$projectroot/$input") ||
1028                 !check_export_ok("$projectroot/$input") ||
1029                 ($strict_export && !project_in_list($input))) {
1030                 return undef;
1031         } else {
1032                 return $input;
1033         }
1034 }
1035
1036 sub validate_pathname {
1037         my $input = shift || return undef;
1038
1039         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1040         # at the beginning, at the end, and between slashes.
1041         # also this catches doubled slashes
1042         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1043                 return undef;
1044         }
1045         # no null characters
1046         if ($input =~ m!\0!) {
1047                 return undef;
1048         }
1049         return $input;
1050 }
1051
1052 sub validate_refname {
1053         my $input = shift || return undef;
1054
1055         # textual hashes are O.K.
1056         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1057                 return $input;
1058         }
1059         # it must be correct pathname
1060         $input = validate_pathname($input)
1061                 or return undef;
1062         # restrictions on ref name according to git-check-ref-format
1063         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1064                 return undef;
1065         }
1066         return $input;
1067 }
1068
1069 # decode sequences of octets in utf8 into Perl's internal form,
1070 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1071 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1072 sub to_utf8 {
1073         my $str = shift;
1074         if (utf8::valid($str)) {
1075                 utf8::decode($str);
1076                 return $str;
1077         } else {
1078                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1079         }
1080 }
1081
1082 # quote unsafe chars, but keep the slash, even when it's not
1083 # correct, but quoted slashes look too horrible in bookmarks
1084 sub esc_param {
1085         my $str = shift;
1086         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1087         $str =~ s/\+/%2B/g;
1088         $str =~ s/ /\+/g;
1089         return $str;
1090 }
1091
1092 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1093 sub esc_url {
1094         my $str = shift;
1095         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1096         $str =~ s/\+/%2B/g;
1097         $str =~ s/ /\+/g;
1098         return $str;
1099 }
1100
1101 # replace invalid utf8 character with SUBSTITUTION sequence
1102 sub esc_html {
1103         my $str = shift;
1104         my %opts = @_;
1105
1106         $str = to_utf8($str);
1107         $str = $cgi->escapeHTML($str);
1108         if ($opts{'-nbsp'}) {
1109                 $str =~ s/ /&nbsp;/g;
1110         }
1111         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1112         return $str;
1113 }
1114
1115 # quote control characters and escape filename to HTML
1116 sub esc_path {
1117         my $str = shift;
1118         my %opts = @_;
1119
1120         $str = to_utf8($str);
1121         $str = $cgi->escapeHTML($str);
1122         if ($opts{'-nbsp'}) {
1123                 $str =~ s/ /&nbsp;/g;
1124         }
1125         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1126         return $str;
1127 }
1128
1129 # Make control characters "printable", using character escape codes (CEC)
1130 sub quot_cec {
1131         my $cntrl = shift;
1132         my %opts = @_;
1133         my %es = ( # character escape codes, aka escape sequences
1134                 "\t" => '\t',   # tab            (HT)
1135                 "\n" => '\n',   # line feed      (LF)
1136                 "\r" => '\r',   # carrige return (CR)
1137                 "\f" => '\f',   # form feed      (FF)
1138                 "\b" => '\b',   # backspace      (BS)
1139                 "\a" => '\a',   # alarm (bell)   (BEL)
1140                 "\e" => '\e',   # escape         (ESC)
1141                 "\013" => '\v', # vertical tab   (VT)
1142                 "\000" => '\0', # nul character  (NUL)
1143         );
1144         my $chr = ( (exists $es{$cntrl})
1145                     ? $es{$cntrl}
1146                     : sprintf('\%2x', ord($cntrl)) );
1147         if ($opts{-nohtml}) {
1148                 return $chr;
1149         } else {
1150                 return "<span class=\"cntrl\">$chr</span>";
1151         }
1152 }
1153
1154 # Alternatively use unicode control pictures codepoints,
1155 # Unicode "printable representation" (PR)
1156 sub quot_upr {
1157         my $cntrl = shift;
1158         my %opts = @_;
1159
1160         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1161         if ($opts{-nohtml}) {
1162                 return $chr;
1163         } else {
1164                 return "<span class=\"cntrl\">$chr</span>";
1165         }
1166 }
1167
1168 # git may return quoted and escaped filenames
1169 sub unquote {
1170         my $str = shift;
1171
1172         sub unq {
1173                 my $seq = shift;
1174                 my %es = ( # character escape codes, aka escape sequences
1175                         't' => "\t",   # tab            (HT, TAB)
1176                         'n' => "\n",   # newline        (NL)
1177                         'r' => "\r",   # return         (CR)
1178                         'f' => "\f",   # form feed      (FF)
1179                         'b' => "\b",   # backspace      (BS)
1180                         'a' => "\a",   # alarm (bell)   (BEL)
1181                         'e' => "\e",   # escape         (ESC)
1182                         'v' => "\013", # vertical tab   (VT)
1183                 );
1184
1185                 if ($seq =~ m/^[0-7]{1,3}$/) {
1186                         # octal char sequence
1187                         return chr(oct($seq));
1188                 } elsif (exists $es{$seq}) {
1189                         # C escape sequence, aka character escape code
1190                         return $es{$seq};
1191                 }
1192                 # quoted ordinary character
1193                 return $seq;
1194         }
1195
1196         if ($str =~ m/^"(.*)"$/) {
1197                 # needs unquoting
1198                 $str = $1;
1199                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1200         }
1201         return $str;
1202 }
1203
1204 # escape tabs (convert tabs to spaces)
1205 sub untabify {
1206         my $line = shift;
1207
1208         while ((my $pos = index($line, "\t")) != -1) {
1209                 if (my $count = (8 - ($pos % 8))) {
1210                         my $spaces = ' ' x $count;
1211                         $line =~ s/\t/$spaces/;
1212                 }
1213         }
1214
1215         return $line;
1216 }
1217
1218 sub project_in_list {
1219         my $project = shift;
1220         my @list = git_get_projects_list();
1221         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1222 }
1223
1224 ## ----------------------------------------------------------------------
1225 ## HTML aware string manipulation
1226
1227 # Try to chop given string on a word boundary between position
1228 # $len and $len+$add_len. If there is no word boundary there,
1229 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1230 # (marking chopped part) would be longer than given string.
1231 sub chop_str {
1232         my $str = shift;
1233         my $len = shift;
1234         my $add_len = shift || 10;
1235         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1236
1237         # Make sure perl knows it is utf8 encoded so we don't
1238         # cut in the middle of a utf8 multibyte char.
1239         $str = to_utf8($str);
1240
1241         # allow only $len chars, but don't cut a word if it would fit in $add_len
1242         # if it doesn't fit, cut it if it's still longer than the dots we would add
1243         # remove chopped character entities entirely
1244
1245         # when chopping in the middle, distribute $len into left and right part
1246         # return early if chopping wouldn't make string shorter
1247         if ($where eq 'center') {
1248                 return $str if ($len + 5 >= length($str)); # filler is length 5
1249                 $len = int($len/2);
1250         } else {
1251                 return $str if ($len + 4 >= length($str)); # filler is length 4
1252         }
1253
1254         # regexps: ending and beginning with word part up to $add_len
1255         my $endre = qr/.{$len}\w{0,$add_len}/;
1256         my $begre = qr/\w{0,$add_len}.{$len}/;
1257
1258         if ($where eq 'left') {
1259                 $str =~ m/^(.*?)($begre)$/;
1260                 my ($lead, $body) = ($1, $2);
1261                 if (length($lead) > 4) {
1262                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1263                         $lead = " ...";
1264                 }
1265                 return "$lead$body";
1266
1267         } elsif ($where eq 'center') {
1268                 $str =~ m/^($endre)(.*)$/;
1269                 my ($left, $str)  = ($1, $2);
1270                 $str =~ m/^(.*?)($begre)$/;
1271                 my ($mid, $right) = ($1, $2);
1272                 if (length($mid) > 5) {
1273                         $left  =~ s/&[^;]*$//;
1274                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1275                         $mid = " ... ";
1276                 }
1277                 return "$left$mid$right";
1278
1279         } else {
1280                 $str =~ m/^($endre)(.*)$/;
1281                 my $body = $1;
1282                 my $tail = $2;
1283                 if (length($tail) > 4) {
1284                         $body =~ s/&[^;]*$//;
1285                         $tail = "... ";
1286                 }
1287                 return "$body$tail";
1288         }
1289 }
1290
1291 # takes the same arguments as chop_str, but also wraps a <span> around the
1292 # result with a title attribute if it does get chopped. Additionally, the
1293 # string is HTML-escaped.
1294 sub chop_and_escape_str {
1295         my ($str) = @_;
1296
1297         my $chopped = chop_str(@_);
1298         if ($chopped eq $str) {
1299                 return esc_html($chopped);
1300         } else {
1301                 $str =~ s/[[:cntrl:]]/?/g;
1302                 return $cgi->span({-title=>$str}, esc_html($chopped));
1303         }
1304 }
1305
1306 ## ----------------------------------------------------------------------
1307 ## functions returning short strings
1308
1309 # CSS class for given age value (in seconds)
1310 sub age_class {
1311         my $age = shift;
1312
1313         if (!defined $age) {
1314                 return "noage";
1315         } elsif ($age < 60*60*2) {
1316                 return "age0";
1317         } elsif ($age < 60*60*24*2) {
1318                 return "age1";
1319         } else {
1320                 return "age2";
1321         }
1322 }
1323
1324 # convert age in seconds to "nn units ago" string
1325 sub age_string {
1326         my $age = shift;
1327         my $age_str;
1328
1329         if ($age > 60*60*24*365*2) {
1330                 $age_str = (int $age/60/60/24/365);
1331                 $age_str .= " years ago";
1332         } elsif ($age > 60*60*24*(365/12)*2) {
1333                 $age_str = int $age/60/60/24/(365/12);
1334                 $age_str .= " months ago";
1335         } elsif ($age > 60*60*24*7*2) {
1336                 $age_str = int $age/60/60/24/7;
1337                 $age_str .= " weeks ago";
1338         } elsif ($age > 60*60*24*2) {
1339                 $age_str = int $age/60/60/24;
1340                 $age_str .= " days ago";
1341         } elsif ($age > 60*60*2) {
1342                 $age_str = int $age/60/60;
1343                 $age_str .= " hours ago";
1344         } elsif ($age > 60*2) {
1345                 $age_str = int $age/60;
1346                 $age_str .= " min ago";
1347         } elsif ($age > 2) {
1348                 $age_str = int $age;
1349                 $age_str .= " sec ago";
1350         } else {
1351                 $age_str .= " right now";
1352         }
1353         return $age_str;
1354 }
1355
1356 use constant {
1357         S_IFINVALID => 0030000,
1358         S_IFGITLINK => 0160000,
1359 };
1360
1361 # submodule/subproject, a commit object reference
1362 sub S_ISGITLINK {
1363         my $mode = shift;
1364
1365         return (($mode & S_IFMT) == S_IFGITLINK)
1366 }
1367
1368 # convert file mode in octal to symbolic file mode string
1369 sub mode_str {
1370         my $mode = oct shift;
1371
1372         if (S_ISGITLINK($mode)) {
1373                 return 'm---------';
1374         } elsif (S_ISDIR($mode & S_IFMT)) {
1375                 return 'drwxr-xr-x';
1376         } elsif (S_ISLNK($mode)) {
1377                 return 'lrwxrwxrwx';
1378         } elsif (S_ISREG($mode)) {
1379                 # git cares only about the executable bit
1380                 if ($mode & S_IXUSR) {
1381                         return '-rwxr-xr-x';
1382                 } else {
1383                         return '-rw-r--r--';
1384                 };
1385         } else {
1386                 return '----------';
1387         }
1388 }
1389
1390 # convert file mode in octal to file type string
1391 sub file_type {
1392         my $mode = shift;
1393
1394         if ($mode !~ m/^[0-7]+$/) {
1395                 return $mode;
1396         } else {
1397                 $mode = oct $mode;
1398         }
1399
1400         if (S_ISGITLINK($mode)) {
1401                 return "submodule";
1402         } elsif (S_ISDIR($mode & S_IFMT)) {
1403                 return "directory";
1404         } elsif (S_ISLNK($mode)) {
1405                 return "symlink";
1406         } elsif (S_ISREG($mode)) {
1407                 return "file";
1408         } else {
1409                 return "unknown";
1410         }
1411 }
1412
1413 # convert file mode in octal to file type description string
1414 sub file_type_long {
1415         my $mode = shift;
1416
1417         if ($mode !~ m/^[0-7]+$/) {
1418                 return $mode;
1419         } else {
1420                 $mode = oct $mode;
1421         }
1422
1423         if (S_ISGITLINK($mode)) {
1424                 return "submodule";
1425         } elsif (S_ISDIR($mode & S_IFMT)) {
1426                 return "directory";
1427         } elsif (S_ISLNK($mode)) {
1428                 return "symlink";
1429         } elsif (S_ISREG($mode)) {
1430                 if ($mode & S_IXUSR) {
1431                         return "executable";
1432                 } else {
1433                         return "file";
1434                 };
1435         } else {
1436                 return "unknown";
1437         }
1438 }
1439
1440
1441 ## ----------------------------------------------------------------------
1442 ## functions returning short HTML fragments, or transforming HTML fragments
1443 ## which don't belong to other sections
1444
1445 # format line of commit message.
1446 sub format_log_line_html {
1447         my $line = shift;
1448
1449         $line = esc_html($line, -nbsp=>1);
1450         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1451                 $cgi->a({-href => href(action=>"object", hash=>$1),
1452                                         -class => "text"}, $1);
1453         }eg;
1454
1455         return $line;
1456 }
1457
1458 # format marker of refs pointing to given object
1459
1460 # the destination action is chosen based on object type and current context:
1461 # - for annotated tags, we choose the tag view unless it's the current view
1462 #   already, in which case we go to shortlog view
1463 # - for other refs, we keep the current view if we're in history, shortlog or
1464 #   log view, and select shortlog otherwise
1465 sub format_ref_marker {
1466         my ($refs, $id) = @_;
1467         my $markers = '';
1468
1469         if (defined $refs->{$id}) {
1470                 foreach my $ref (@{$refs->{$id}}) {
1471                         # this code exploits the fact that non-lightweight tags are the
1472                         # only indirect objects, and that they are the only objects for which
1473                         # we want to use tag instead of shortlog as action
1474                         my ($type, $name) = qw();
1475                         my $indirect = ($ref =~ s/\^\{\}$//);
1476                         # e.g. tags/v2.6.11 or heads/next
1477                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1478                                 $type = $1;
1479                                 $name = $2;
1480                         } else {
1481                                 $type = "ref";
1482                                 $name = $ref;
1483                         }
1484
1485                         my $class = $type;
1486                         $class .= " indirect" if $indirect;
1487
1488                         my $dest_action = "shortlog";
1489
1490                         if ($indirect) {
1491                                 $dest_action = "tag" unless $action eq "tag";
1492                         } elsif ($action =~ /^(history|(short)?log)$/) {
1493                                 $dest_action = $action;
1494                         }
1495
1496                         my $dest = "";
1497                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1498                         $dest .= $ref;
1499
1500                         my $link = $cgi->a({
1501                                 -href => href(
1502                                         action=>$dest_action,
1503                                         hash=>$dest
1504                                 )}, $name);
1505
1506                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1507                                 $link . "</span>";
1508                 }
1509         }
1510
1511         if ($markers) {
1512                 return ' <span class="refs">'. $markers . '</span>';
1513         } else {
1514                 return "";
1515         }
1516 }
1517
1518 # format, perhaps shortened and with markers, title line
1519 sub format_subject_html {
1520         my ($long, $short, $href, $extra) = @_;
1521         $extra = '' unless defined($extra);
1522
1523         if (length($short) < length($long)) {
1524                 $long =~ s/[[:cntrl:]]/?/g;
1525                 return $cgi->a({-href => $href, -class => "list subject",
1526                                 -title => to_utf8($long)},
1527                        esc_html($short) . $extra);
1528         } else {
1529                 return $cgi->a({-href => $href, -class => "list subject"},
1530                        esc_html($long)  . $extra);
1531         }
1532 }
1533
1534 # Rather than recomputing the url for an email multiple times, we cache it
1535 # after the first hit. This gives a visible benefit in views where the avatar
1536 # for the same email is used repeatedly (e.g. shortlog).
1537 # The cache is shared by all avatar engines (currently gravatar only), which
1538 # are free to use it as preferred. Since only one avatar engine is used for any
1539 # given page, there's no risk for cache conflicts.
1540 our %avatar_cache = ();
1541
1542 # Compute the picon url for a given email, by using the picon search service over at
1543 # http://www.cs.indiana.edu/picons/search.html
1544 sub picon_url {
1545         my $email = lc shift;
1546         if (!$avatar_cache{$email}) {
1547                 my ($user, $domain) = split('@', $email);
1548                 $avatar_cache{$email} =
1549                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1550                         "$domain/$user/" .
1551                         "users+domains+unknown/up/single";
1552         }
1553         return $avatar_cache{$email};
1554 }
1555
1556 # Compute the gravatar url for a given email, if it's not in the cache already.
1557 # Gravatar stores only the part of the URL before the size, since that's the
1558 # one computationally more expensive. This also allows reuse of the cache for
1559 # different sizes (for this particular engine).
1560 sub gravatar_url {
1561         my $email = lc shift;
1562         my $size = shift;
1563         $avatar_cache{$email} ||=
1564                 "http://www.gravatar.com/avatar/" .
1565                         Digest::MD5::md5_hex($email) . "?s=";
1566         return $avatar_cache{$email} . $size;
1567 }
1568
1569 # Insert an avatar for the given $email at the given $size if the feature
1570 # is enabled.
1571 sub git_get_avatar {
1572         my ($email, %opts) = @_;
1573         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1574         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1575         $opts{-size} ||= 'default';
1576         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1577         my $url = "";
1578         if ($git_avatar eq 'gravatar') {
1579                 $url = gravatar_url($email, $size);
1580         } elsif ($git_avatar eq 'picon') {
1581                 $url = picon_url($email);
1582         }
1583         # Other providers can be added by extending the if chain, defining $url
1584         # as needed. If no variant puts something in $url, we assume avatars
1585         # are completely disabled/unavailable.
1586         if ($url) {
1587                 return $pre_white .
1588                        "<img width=\"$size\" " .
1589                             "class=\"avatar\" " .
1590                             "src=\"$url\" " .
1591                             "alt=\"\" " .
1592                        "/>" . $post_white;
1593         } else {
1594                 return "";
1595         }
1596 }
1597
1598 # format the author name of the given commit with the given tag
1599 # the author name is chopped and escaped according to the other
1600 # optional parameters (see chop_str).
1601 sub format_author_html {
1602         my $tag = shift;
1603         my $co = shift;
1604         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1605         return "<$tag class=\"author\">" .
1606                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1607                $author . "</$tag>";
1608 }
1609
1610 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1611 sub format_git_diff_header_line {
1612         my $line = shift;
1613         my $diffinfo = shift;
1614         my ($from, $to) = @_;
1615
1616         if ($diffinfo->{'nparents'}) {
1617                 # combined diff
1618                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1619                 if ($to->{'href'}) {
1620                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1621                                          esc_path($to->{'file'}));
1622                 } else { # file was deleted (no href)
1623                         $line .= esc_path($to->{'file'});
1624                 }
1625         } else {
1626                 # "ordinary" diff
1627                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1628                 if ($from->{'href'}) {
1629                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1630                                          'a/' . esc_path($from->{'file'}));
1631                 } else { # file was added (no href)
1632                         $line .= 'a/' . esc_path($from->{'file'});
1633                 }
1634                 $line .= ' ';
1635                 if ($to->{'href'}) {
1636                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1637                                          'b/' . esc_path($to->{'file'}));
1638                 } else { # file was deleted
1639                         $line .= 'b/' . esc_path($to->{'file'});
1640                 }
1641         }
1642
1643         return "<div class=\"diff header\">$line</div>\n";
1644 }
1645
1646 # format extended diff header line, before patch itself
1647 sub format_extended_diff_header_line {
1648         my $line = shift;
1649         my $diffinfo = shift;
1650         my ($from, $to) = @_;
1651
1652         # match <path>
1653         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1654                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1655                                        esc_path($from->{'file'}));
1656         }
1657         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1658                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1659                                  esc_path($to->{'file'}));
1660         }
1661         # match single <mode>
1662         if ($line =~ m/\s(\d{6})$/) {
1663                 $line .= '<span class="info"> (' .
1664                          file_type_long($1) .
1665                          ')</span>';
1666         }
1667         # match <hash>
1668         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1669                 # can match only for combined diff
1670                 $line = 'index ';
1671                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1672                         if ($from->{'href'}[$i]) {
1673                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1674                                                   -class=>"hash"},
1675                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1676                         } else {
1677                                 $line .= '0' x 7;
1678                         }
1679                         # separator
1680                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1681                 }
1682                 $line .= '..';
1683                 if ($to->{'href'}) {
1684                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1685                                          substr($diffinfo->{'to_id'},0,7));
1686                 } else {
1687                         $line .= '0' x 7;
1688                 }
1689
1690         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1691                 # can match only for ordinary diff
1692                 my ($from_link, $to_link);
1693                 if ($from->{'href'}) {
1694                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1695                                              substr($diffinfo->{'from_id'},0,7));
1696                 } else {
1697                         $from_link = '0' x 7;
1698                 }
1699                 if ($to->{'href'}) {
1700                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1701                                            substr($diffinfo->{'to_id'},0,7));
1702                 } else {
1703                         $to_link = '0' x 7;
1704                 }
1705                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1706                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1707         }
1708
1709         return $line . "<br/>\n";
1710 }
1711
1712 # format from-file/to-file diff header
1713 sub format_diff_from_to_header {
1714         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1715         my $line;
1716         my $result = '';
1717
1718         $line = $from_line;
1719         #assert($line =~ m/^---/) if DEBUG;
1720         # no extra formatting for "^--- /dev/null"
1721         if (! $diffinfo->{'nparents'}) {
1722                 # ordinary (single parent) diff
1723                 if ($line =~ m!^--- "?a/!) {
1724                         if ($from->{'href'}) {
1725                                 $line = '--- a/' .
1726                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1727                                                 esc_path($from->{'file'}));
1728                         } else {
1729                                 $line = '--- a/' .
1730                                         esc_path($from->{'file'});
1731                         }
1732                 }
1733                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1734
1735         } else {
1736                 # combined diff (merge commit)
1737                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1738                         if ($from->{'href'}[$i]) {
1739                                 $line = '--- ' .
1740                                         $cgi->a({-href=>href(action=>"blobdiff",
1741                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1742                                                              hash_parent_base=>$parents[$i],
1743                                                              file_parent=>$from->{'file'}[$i],
1744                                                              hash=>$diffinfo->{'to_id'},
1745                                                              hash_base=>$hash,
1746                                                              file_name=>$to->{'file'}),
1747                                                  -class=>"path",
1748                                                  -title=>"diff" . ($i+1)},
1749                                                 $i+1) .
1750                                         '/' .
1751                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1752                                                 esc_path($from->{'file'}[$i]));
1753                         } else {
1754                                 $line = '--- /dev/null';
1755                         }
1756                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1757                 }
1758         }
1759
1760         $line = $to_line;
1761         #assert($line =~ m/^\+\+\+/) if DEBUG;
1762         # no extra formatting for "^+++ /dev/null"
1763         if ($line =~ m!^\+\+\+ "?b/!) {
1764                 if ($to->{'href'}) {
1765                         $line = '+++ b/' .
1766                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1767                                         esc_path($to->{'file'}));
1768                 } else {
1769                         $line = '+++ b/' .
1770                                 esc_path($to->{'file'});
1771                 }
1772         }
1773         $result .= qq!<div class="diff to_file">$line</div>\n!;
1774
1775         return $result;
1776 }
1777
1778 # create note for patch simplified by combined diff
1779 sub format_diff_cc_simplified {
1780         my ($diffinfo, @parents) = @_;
1781         my $result = '';
1782
1783         $result .= "<div class=\"diff header\">" .
1784                    "diff --cc ";
1785         if (!is_deleted($diffinfo)) {
1786                 $result .= $cgi->a({-href => href(action=>"blob",
1787                                                   hash_base=>$hash,
1788                                                   hash=>$diffinfo->{'to_id'},
1789                                                   file_name=>$diffinfo->{'to_file'}),
1790                                     -class => "path"},
1791                                    esc_path($diffinfo->{'to_file'}));
1792         } else {
1793                 $result .= esc_path($diffinfo->{'to_file'});
1794         }
1795         $result .= "</div>\n" . # class="diff header"
1796                    "<div class=\"diff nodifferences\">" .
1797                    "Simple merge" .
1798                    "</div>\n"; # class="diff nodifferences"
1799
1800         return $result;
1801 }
1802
1803 # format patch (diff) line (not to be used for diff headers)
1804 sub format_diff_line {
1805         my $line = shift;
1806         my ($from, $to) = @_;
1807         my $diff_class = "";
1808
1809         chomp $line;
1810
1811         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1812                 # combined diff
1813                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1814                 if ($line =~ m/^\@{3}/) {
1815                         $diff_class = " chunk_header";
1816                 } elsif ($line =~ m/^\\/) {
1817                         $diff_class = " incomplete";
1818                 } elsif ($prefix =~ tr/+/+/) {
1819                         $diff_class = " add";
1820                 } elsif ($prefix =~ tr/-/-/) {
1821                         $diff_class = " rem";
1822                 }
1823         } else {
1824                 # assume ordinary diff
1825                 my $char = substr($line, 0, 1);
1826                 if ($char eq '+') {
1827                         $diff_class = " add";
1828                 } elsif ($char eq '-') {
1829                         $diff_class = " rem";
1830                 } elsif ($char eq '@') {
1831                         $diff_class = " chunk_header";
1832                 } elsif ($char eq "\\") {
1833                         $diff_class = " incomplete";
1834                 }
1835         }
1836         $line = untabify($line);
1837         if ($from && $to && $line =~ m/^\@{2} /) {
1838                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1839                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1840
1841                 $from_lines = 0 unless defined $from_lines;
1842                 $to_lines   = 0 unless defined $to_lines;
1843
1844                 if ($from->{'href'}) {
1845                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1846                                              -class=>"list"}, $from_text);
1847                 }
1848                 if ($to->{'href'}) {
1849                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1850                                              -class=>"list"}, $to_text);
1851                 }
1852                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1853                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1854                 return "<div class=\"diff$diff_class\">$line</div>\n";
1855         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1856                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1857                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1858
1859                 @from_text = split(' ', $ranges);
1860                 for (my $i = 0; $i < @from_text; ++$i) {
1861                         ($from_start[$i], $from_nlines[$i]) =
1862                                 (split(',', substr($from_text[$i], 1)), 0);
1863                 }
1864
1865                 $to_text   = pop @from_text;
1866                 $to_start  = pop @from_start;
1867                 $to_nlines = pop @from_nlines;
1868
1869                 $line = "<span class=\"chunk_info\">$prefix ";
1870                 for (my $i = 0; $i < @from_text; ++$i) {
1871                         if ($from->{'href'}[$i]) {
1872                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1873                                                   -class=>"list"}, $from_text[$i]);
1874                         } else {
1875                                 $line .= $from_text[$i];
1876                         }
1877                         $line .= " ";
1878                 }
1879                 if ($to->{'href'}) {
1880                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1881                                           -class=>"list"}, $to_text);
1882                 } else {
1883                         $line .= $to_text;
1884                 }
1885                 $line .= " $prefix</span>" .
1886                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1887                 return "<div class=\"diff$diff_class\">$line</div>\n";
1888         }
1889         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1890 }
1891
1892 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1893 # linked.  Pass the hash of the tree/commit to snapshot.
1894 sub format_snapshot_links {
1895         my ($hash) = @_;
1896         my $num_fmts = @snapshot_fmts;
1897         if ($num_fmts > 1) {
1898                 # A parenthesized list of links bearing format names.
1899                 # e.g. "snapshot (_tar.gz_ _zip_)"
1900                 return "snapshot (" . join(' ', map
1901                         $cgi->a({
1902                                 -href => href(
1903                                         action=>"snapshot",
1904                                         hash=>$hash,
1905                                         snapshot_format=>$_
1906                                 )
1907                         }, $known_snapshot_formats{$_}{'display'})
1908                 , @snapshot_fmts) . ")";
1909         } elsif ($num_fmts == 1) {
1910                 # A single "snapshot" link whose tooltip bears the format name.
1911                 # i.e. "_snapshot_"
1912                 my ($fmt) = @snapshot_fmts;
1913                 return
1914                         $cgi->a({
1915                                 -href => href(
1916                                         action=>"snapshot",
1917                                         hash=>$hash,
1918                                         snapshot_format=>$fmt
1919                                 ),
1920                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1921                         }, "snapshot");
1922         } else { # $num_fmts == 0
1923                 return undef;
1924         }
1925 }
1926
1927 ## ......................................................................
1928 ## functions returning values to be passed, perhaps after some
1929 ## transformation, to other functions; e.g. returning arguments to href()
1930
1931 # returns hash to be passed to href to generate gitweb URL
1932 # in -title key it returns description of link
1933 sub get_feed_info {
1934         my $format = shift || 'Atom';
1935         my %res = (action => lc($format));
1936
1937         # feed links are possible only for project views
1938         return unless (defined $project);
1939         # some views should link to OPML, or to generic project feed,
1940         # or don't have specific feed yet (so they should use generic)
1941         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1942
1943         my $branch;
1944         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1945         # from tag links; this also makes possible to detect branch links
1946         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1947             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1948                 $branch = $1;
1949         }
1950         # find log type for feed description (title)
1951         my $type = 'log';
1952         if (defined $file_name) {
1953                 $type  = "history of $file_name";
1954                 $type .= "/" if ($action eq 'tree');
1955                 $type .= " on '$branch'" if (defined $branch);
1956         } else {
1957                 $type = "log of $branch" if (defined $branch);
1958         }
1959
1960         $res{-title} = $type;
1961         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1962         $res{'file_name'} = $file_name;
1963
1964         return %res;
1965 }
1966
1967 ## ----------------------------------------------------------------------
1968 ## git utility subroutines, invoking git commands
1969
1970 # returns path to the core git executable and the --git-dir parameter as list
1971 sub git_cmd {
1972         $number_of_git_cmds++;
1973         return $GIT, '--git-dir='.$git_dir;
1974 }
1975
1976 # quote the given arguments for passing them to the shell
1977 # quote_command("command", "arg 1", "arg with ' and ! characters")
1978 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1979 # Try to avoid using this function wherever possible.
1980 sub quote_command {
1981         return join(' ',
1982                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1983 }
1984
1985 # get HEAD ref of given project as hash
1986 sub git_get_head_hash {
1987         my $project = shift;
1988         my $o_git_dir = $git_dir;
1989         my $retval = undef;
1990         $git_dir = "$projectroot/$project";
1991         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1992                 my $head = <$fd>;
1993                 close $fd;
1994                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1995                         $retval = $1;
1996                 }
1997         }
1998         if (defined $o_git_dir) {
1999                 $git_dir = $o_git_dir;
2000         }
2001         return $retval;
2002 }
2003
2004 # get type of given object
2005 sub git_get_type {
2006         my $hash = shift;
2007
2008         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2009         my $type = <$fd>;
2010         close $fd or return;
2011         chomp $type;
2012         return $type;
2013 }
2014
2015 # repository configuration
2016 our $config_file = '';
2017 our %config;
2018
2019 # store multiple values for single key as anonymous array reference
2020 # single values stored directly in the hash, not as [ <value> ]
2021 sub hash_set_multi {
2022         my ($hash, $key, $value) = @_;
2023
2024         if (!exists $hash->{$key}) {
2025                 $hash->{$key} = $value;
2026         } elsif (!ref $hash->{$key}) {
2027                 $hash->{$key} = [ $hash->{$key}, $value ];
2028         } else {
2029                 push @{$hash->{$key}}, $value;
2030         }
2031 }
2032
2033 # return hash of git project configuration
2034 # optionally limited to some section, e.g. 'gitweb'
2035 sub git_parse_project_config {
2036         my $section_regexp = shift;
2037         my %config;
2038
2039         local $/ = "\0";
2040
2041         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2042                 or return;
2043
2044         while (my $keyval = <$fh>) {
2045                 chomp $keyval;
2046                 my ($key, $value) = split(/\n/, $keyval, 2);
2047
2048                 hash_set_multi(\%config, $key, $value)
2049                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2050         }
2051         close $fh;
2052
2053         return %config;
2054 }
2055
2056 # convert config value to boolean: 'true' or 'false'
2057 # no value, number > 0, 'true' and 'yes' values are true
2058 # rest of values are treated as false (never as error)
2059 sub config_to_bool {
2060         my $val = shift;
2061
2062         return 1 if !defined $val;             # section.key
2063
2064         # strip leading and trailing whitespace
2065         $val =~ s/^\s+//;
2066         $val =~ s/\s+$//;
2067
2068         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2069                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2070 }
2071
2072 # convert config value to simple decimal number
2073 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2074 # to be multiplied by 1024, 1048576, or 1073741824
2075 sub config_to_int {
2076         my $val = shift;
2077
2078         # strip leading and trailing whitespace
2079         $val =~ s/^\s+//;
2080         $val =~ s/\s+$//;
2081
2082         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2083                 $unit = lc($unit);
2084                 # unknown unit is treated as 1
2085                 return $num * ($unit eq 'g' ? 1073741824 :
2086                                $unit eq 'm' ?    1048576 :
2087                                $unit eq 'k' ?       1024 : 1);
2088         }
2089         return $val;
2090 }
2091
2092 # convert config value to array reference, if needed
2093 sub config_to_multi {
2094         my $val = shift;
2095
2096         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2097 }
2098
2099 sub git_get_project_config {
2100         my ($key, $type) = @_;
2101
2102         # key sanity check
2103         return unless ($key);
2104         $key =~ s/^gitweb\.//;
2105         return if ($key =~ m/\W/);
2106
2107         # type sanity check
2108         if (defined $type) {
2109                 $type =~ s/^--//;
2110                 $type = undef
2111                         unless ($type eq 'bool' || $type eq 'int');
2112         }
2113
2114         # get config
2115         if (!defined $config_file ||
2116             $config_file ne "$git_dir/config") {
2117                 %config = git_parse_project_config('gitweb');
2118                 $config_file = "$git_dir/config";
2119         }
2120
2121         # check if config variable (key) exists
2122         return unless exists $config{"gitweb.$key"};
2123
2124         # ensure given type
2125         if (!defined $type) {
2126                 return $config{"gitweb.$key"};
2127         } elsif ($type eq 'bool') {
2128                 # backward compatibility: 'git config --bool' returns true/false
2129                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2130         } elsif ($type eq 'int') {
2131                 return config_to_int($config{"gitweb.$key"});
2132         }
2133         return $config{"gitweb.$key"};
2134 }
2135
2136 # get hash of given path at given ref
2137 sub git_get_hash_by_path {
2138         my $base = shift;
2139         my $path = shift || return undef;
2140         my $type = shift;
2141
2142         $path =~ s,/+$,,;
2143
2144         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2145                 or die_error(500, "Open git-ls-tree failed");
2146         my $line = <$fd>;
2147         close $fd or return undef;
2148
2149         if (!defined $line) {
2150                 # there is no tree or hash given by $path at $base
2151                 return undef;
2152         }
2153
2154         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2155         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2156         if (defined $type && $type ne $2) {
2157                 # type doesn't match
2158                 return undef;
2159         }
2160         return $3;
2161 }
2162
2163 # get path of entry with given hash at given tree-ish (ref)
2164 # used to get 'from' filename for combined diff (merge commit) for renames
2165 sub git_get_path_by_hash {
2166         my $base = shift || return;
2167         my $hash = shift || return;
2168
2169         local $/ = "\0";
2170
2171         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2172                 or return undef;
2173         while (my $line = <$fd>) {
2174                 chomp $line;
2175
2176                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2177                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2178                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2179                         close $fd;
2180                         return $1;
2181                 }
2182         }
2183         close $fd;
2184         return undef;
2185 }
2186
2187 ## ......................................................................
2188 ## git utility functions, directly accessing git repository
2189
2190 sub git_get_project_description {
2191         my $path = shift;
2192
2193         $git_dir = "$projectroot/$path";
2194         open my $fd, '<', "$git_dir/description"
2195                 or return git_get_project_config('description');
2196         my $descr = <$fd>;
2197         close $fd;
2198         if (defined $descr) {
2199                 chomp $descr;
2200         }
2201         return $descr;
2202 }
2203
2204 sub git_get_project_ctags {
2205         my $path = shift;
2206         my $ctags = {};
2207
2208         $git_dir = "$projectroot/$path";
2209         opendir my $dh, "$git_dir/ctags"
2210                 or return $ctags;
2211         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2212                 open my $ct, '<', $_ or next;
2213                 my $val = <$ct>;
2214                 chomp $val;
2215                 close $ct;
2216                 my $ctag = $_; $ctag =~ s#.*/##;
2217                 $ctags->{$ctag} = $val;
2218         }
2219         closedir $dh;
2220         $ctags;
2221 }
2222
2223 sub git_populate_project_tagcloud {
2224         my $ctags = shift;
2225
2226         # First, merge different-cased tags; tags vote on casing
2227         my %ctags_lc;
2228         foreach (keys %$ctags) {
2229                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2230                 if (not $ctags_lc{lc $_}->{topcount}
2231                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2232                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2233                         $ctags_lc{lc $_}->{topname} = $_;
2234                 }
2235         }
2236
2237         my $cloud;
2238         if (eval { require HTML::TagCloud; 1; }) {
2239                 $cloud = HTML::TagCloud->new;
2240                 foreach (sort keys %ctags_lc) {
2241                         # Pad the title with spaces so that the cloud looks
2242                         # less crammed.
2243                         my $title = $ctags_lc{$_}->{topname};
2244                         $title =~ s/ /&nbsp;/g;
2245                         $title =~ s/^/&nbsp;/g;
2246                         $title =~ s/$/&nbsp;/g;
2247                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2248                 }
2249         } else {
2250                 $cloud = \%ctags_lc;
2251         }
2252         $cloud;
2253 }
2254
2255 sub git_show_project_tagcloud {
2256         my ($cloud, $count) = @_;
2257         print STDERR ref($cloud)."..\n";
2258         if (ref $cloud eq 'HTML::TagCloud') {
2259                 return $cloud->html_and_css($count);
2260         } else {
2261                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2262                 return '<p align="center">' . join (', ', map {
2263                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2264                 } splice(@tags, 0, $count)) . '</p>';
2265         }
2266 }
2267
2268 sub git_get_project_url_list {
2269         my $path = shift;
2270
2271         $git_dir = "$projectroot/$path";
2272         open my $fd, '<', "$git_dir/cloneurl"
2273                 or return wantarray ?
2274                 @{ config_to_multi(git_get_project_config('url')) } :
2275                    config_to_multi(git_get_project_config('url'));
2276         my @git_project_url_list = map { chomp; $_ } <$fd>;
2277         close $fd;
2278
2279         return wantarray ? @git_project_url_list : \@git_project_url_list;
2280 }
2281
2282 sub git_get_projects_list {
2283         my ($filter) = @_;
2284         my @list;
2285
2286         $filter ||= '';
2287         $filter =~ s/\.git$//;
2288
2289         my $check_forks = gitweb_check_feature('forks');
2290
2291         if (-d $projects_list) {
2292                 # search in directory
2293                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2294                 # remove the trailing "/"
2295                 $dir =~ s!/+$!!;
2296                 my $pfxlen = length("$dir");
2297                 my $pfxdepth = ($dir =~ tr!/!!);
2298
2299                 File::Find::find({
2300                         follow_fast => 1, # follow symbolic links
2301                         follow_skip => 2, # ignore duplicates
2302                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2303                         wanted => sub {
2304                                 # skip project-list toplevel, if we get it.
2305                                 return if (m!^[/.]$!);
2306                                 # only directories can be git repositories
2307                                 return unless (-d $_);
2308                                 # don't traverse too deep (Find is super slow on os x)
2309                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2310                                         $File::Find::prune = 1;
2311                                         return;
2312                                 }
2313
2314                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2315                                 # we check related file in $projectroot
2316                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2317                                 if (check_export_ok("$projectroot/$path")) {
2318                                         push @list, { path => $path };
2319                                         $File::Find::prune = 1;
2320                                 }
2321                         },
2322                 }, "$dir");
2323
2324         } elsif (-f $projects_list) {
2325                 # read from file(url-encoded):
2326                 # 'git%2Fgit.git Linus+Torvalds'
2327                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2328                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2329                 my %paths;
2330                 open my $fd, '<', $projects_list or return;
2331         PROJECT:
2332                 while (my $line = <$fd>) {
2333                         chomp $line;
2334                         my ($path, $owner) = split ' ', $line;
2335                         $path = unescape($path);
2336                         $owner = unescape($owner);
2337                         if (!defined $path) {
2338                                 next;
2339                         }
2340                         if ($filter ne '') {
2341                                 # looking for forks;
2342                                 my $pfx = substr($path, 0, length($filter));
2343                                 if ($pfx ne $filter) {
2344                                         next PROJECT;
2345                                 }
2346                                 my $sfx = substr($path, length($filter));
2347                                 if ($sfx !~ /^\/.*\.git$/) {
2348                                         next PROJECT;
2349                                 }
2350                         } elsif ($check_forks) {
2351                         PATH:
2352                                 foreach my $filter (keys %paths) {
2353                                         # looking for forks;
2354                                         my $pfx = substr($path, 0, length($filter));
2355                                         if ($pfx ne $filter) {
2356                                                 next PATH;
2357                                         }
2358                                         my $sfx = substr($path, length($filter));
2359                                         if ($sfx !~ /^\/.*\.git$/) {
2360                                                 next PATH;
2361                                         }
2362                                         # is a fork, don't include it in
2363                                         # the list
2364                                         next PROJECT;
2365                                 }
2366                         }
2367                         if (check_export_ok("$projectroot/$path")) {
2368                                 my $pr = {
2369                                         path => $path,
2370                                         owner => to_utf8($owner),
2371                                 };
2372                                 push @list, $pr;
2373                                 (my $forks_path = $path) =~ s/\.git$//;
2374                                 $paths{$forks_path}++;
2375                         }
2376                 }
2377                 close $fd;
2378         }
2379         return @list;
2380 }
2381
2382 our $gitweb_project_owner = undef;
2383 sub git_get_project_list_from_file {
2384
2385         return if (defined $gitweb_project_owner);
2386
2387         $gitweb_project_owner = {};
2388         # read from file (url-encoded):
2389         # 'git%2Fgit.git Linus+Torvalds'
2390         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2391         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2392         if (-f $projects_list) {
2393                 open(my $fd, '<', $projects_list);
2394                 while (my $line = <$fd>) {
2395                         chomp $line;
2396                         my ($pr, $ow) = split ' ', $line;
2397                         $pr = unescape($pr);
2398                         $ow = unescape($ow);
2399                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2400                 }
2401                 close $fd;
2402         }
2403 }
2404
2405 sub git_get_project_owner {
2406         my $project = shift;
2407         my $owner;
2408
2409         return undef unless $project;
2410         $git_dir = "$projectroot/$project";
2411
2412         if (!defined $gitweb_project_owner) {
2413                 git_get_project_list_from_file();
2414         }
2415
2416         if (exists $gitweb_project_owner->{$project}) {
2417                 $owner = $gitweb_project_owner->{$project};
2418         }
2419         if (!defined $owner){
2420                 $owner = git_get_project_config('owner');
2421         }
2422         if (!defined $owner) {
2423                 $owner = get_file_owner("$git_dir");
2424         }
2425
2426         return $owner;
2427 }
2428
2429 sub git_get_last_activity {
2430         my ($path) = @_;
2431         my $fd;
2432
2433         $git_dir = "$projectroot/$path";
2434         open($fd, "-|", git_cmd(), 'for-each-ref',
2435              '--format=%(committer)',
2436              '--sort=-committerdate',
2437              '--count=1',
2438              'refs/heads') or return;
2439         my $most_recent = <$fd>;
2440         close $fd or return;
2441         if (defined $most_recent &&
2442             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2443                 my $timestamp = $1;
2444                 my $age = time - $timestamp;
2445                 return ($age, age_string($age));
2446         }
2447         return (undef, undef);
2448 }
2449
2450 sub git_get_references {
2451         my $type = shift || "";
2452         my %refs;
2453         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2454         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2455         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2456                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2457                 or return;
2458
2459         while (my $line = <$fd>) {
2460                 chomp $line;
2461                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2462                         if (defined $refs{$1}) {
2463                                 push @{$refs{$1}}, $2;
2464                         } else {
2465                                 $refs{$1} = [ $2 ];
2466                         }
2467                 }
2468         }
2469         close $fd or return;
2470         return \%refs;
2471 }
2472
2473 sub git_get_rev_name_tags {
2474         my $hash = shift || return undef;
2475
2476         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2477                 or return;
2478         my $name_rev = <$fd>;
2479         close $fd;
2480
2481         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2482                 return $1;
2483         } else {
2484                 # catches also '$hash undefined' output
2485                 return undef;
2486         }
2487 }
2488
2489 ## ----------------------------------------------------------------------
2490 ## parse to hash functions
2491
2492 sub parse_date {
2493         my $epoch = shift;
2494         my $tz = shift || "-0000";
2495
2496         my %date;
2497         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2498         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2499         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2500         $date{'hour'} = $hour;
2501         $date{'minute'} = $min;
2502         $date{'mday'} = $mday;
2503         $date{'day'} = $days[$wday];
2504         $date{'month'} = $months[$mon];
2505         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2506                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2507         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2508                              $mday, $months[$mon], $hour ,$min;
2509         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2510                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2511
2512         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2513         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2514         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2515         $date{'hour_local'} = $hour;
2516         $date{'minute_local'} = $min;
2517         $date{'tz_local'} = $tz;
2518         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2519                                   1900+$year, $mon+1, $mday,
2520                                   $hour, $min, $sec, $tz);
2521         return %date;
2522 }
2523
2524 sub parse_tag {
2525         my $tag_id = shift;
2526         my %tag;
2527         my @comment;
2528
2529         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2530         $tag{'id'} = $tag_id;
2531         while (my $line = <$fd>) {
2532                 chomp $line;
2533                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2534                         $tag{'object'} = $1;
2535                 } elsif ($line =~ m/^type (.+)$/) {
2536                         $tag{'type'} = $1;
2537                 } elsif ($line =~ m/^tag (.+)$/) {
2538                         $tag{'name'} = $1;
2539                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2540                         $tag{'author'} = $1;
2541                         $tag{'author_epoch'} = $2;
2542                         $tag{'author_tz'} = $3;
2543                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2544                                 $tag{'author_name'}  = $1;
2545                                 $tag{'author_email'} = $2;
2546                         } else {
2547                                 $tag{'author_name'} = $tag{'author'};
2548                         }
2549                 } elsif ($line =~ m/--BEGIN/) {
2550                         push @comment, $line;
2551                         last;
2552                 } elsif ($line eq "") {
2553                         last;
2554                 }
2555         }
2556         push @comment, <$fd>;
2557         $tag{'comment'} = \@comment;
2558         close $fd or return;
2559         if (!defined $tag{'name'}) {
2560                 return
2561         };
2562         return %tag
2563 }
2564
2565 sub parse_commit_text {
2566         my ($commit_text, $withparents) = @_;
2567         my @commit_lines = split '\n', $commit_text;
2568         my %co;
2569
2570         pop @commit_lines; # Remove '\0'
2571
2572         if (! @commit_lines) {
2573                 return;
2574         }
2575
2576         my $header = shift @commit_lines;
2577         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2578                 return;
2579         }
2580         ($co{'id'}, my @parents) = split ' ', $header;
2581         while (my $line = shift @commit_lines) {
2582                 last if $line eq "\n";
2583                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2584                         $co{'tree'} = $1;
2585                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2586                         push @parents, $1;
2587                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2588                         $co{'author'} = $1;
2589                         $co{'author_epoch'} = $2;
2590                         $co{'author_tz'} = $3;
2591                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2592                                 $co{'author_name'}  = $1;
2593                                 $co{'author_email'} = $2;
2594                         } else {
2595                                 $co{'author_name'} = $co{'author'};
2596                         }
2597                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2598                         $co{'committer'} = $1;
2599                         $co{'committer_epoch'} = $2;
2600                         $co{'committer_tz'} = $3;
2601                         $co{'committer_name'} = $co{'committer'};
2602                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2603                                 $co{'committer_name'}  = $1;
2604                                 $co{'committer_email'} = $2;
2605                         } else {
2606                                 $co{'committer_name'} = $co{'committer'};
2607                         }
2608                 }
2609         }
2610         if (!defined $co{'tree'}) {
2611                 return;
2612         };
2613         $co{'parents'} = \@parents;
2614         $co{'parent'} = $parents[0];
2615
2616         foreach my $title (@commit_lines) {
2617                 $title =~ s/^    //;
2618                 if ($title ne "") {
2619                         $co{'title'} = chop_str($title, 80, 5);
2620                         # remove leading stuff of merges to make the interesting part visible
2621                         if (length($title) > 50) {
2622                                 $title =~ s/^Automatic //;
2623                                 $title =~ s/^merge (of|with) /Merge ... /i;
2624                                 if (length($title) > 50) {
2625                                         $title =~ s/(http|rsync):\/\///;
2626                                 }
2627                                 if (length($title) > 50) {
2628                                         $title =~ s/(master|www|rsync)\.//;
2629                                 }
2630                                 if (length($title) > 50) {
2631                                         $title =~ s/kernel.org:?//;
2632                                 }
2633                                 if (length($title) > 50) {
2634                                         $title =~ s/\/pub\/scm//;
2635                                 }
2636                         }
2637                         $co{'title_short'} = chop_str($title, 50, 5);
2638                         last;
2639                 }
2640         }
2641         if (! defined $co{'title'} || $co{'title'} eq "") {
2642                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2643         }
2644         # remove added spaces
2645         foreach my $line (@commit_lines) {
2646                 $line =~ s/^    //;
2647         }
2648         $co{'comment'} = \@commit_lines;
2649
2650         my $age = time - $co{'committer_epoch'};
2651         $co{'age'} = $age;
2652         $co{'age_string'} = age_string($age);
2653         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2654         if ($age > 60*60*24*7*2) {
2655                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2656                 $co{'age_string_age'} = $co{'age_string'};
2657         } else {
2658                 $co{'age_string_date'} = $co{'age_string'};
2659                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2660         }
2661         return %co;
2662 }
2663
2664 sub parse_commit {
2665         my ($commit_id) = @_;
2666         my %co;
2667
2668         local $/ = "\0";
2669
2670         open my $fd, "-|", git_cmd(), "rev-list",
2671                 "--parents",
2672                 "--header",
2673                 "--max-count=1",
2674                 $commit_id,
2675                 "--",
2676                 or die_error(500, "Open git-rev-list failed");
2677         %co = parse_commit_text(<$fd>, 1);
2678         close $fd;
2679
2680         return %co;
2681 }
2682
2683 sub parse_commits {
2684         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2685         my @cos;
2686
2687         $maxcount ||= 1;
2688         $skip ||= 0;
2689
2690         local $/ = "\0";
2691
2692         open my $fd, "-|", git_cmd(), "rev-list",
2693                 "--header",
2694                 @args,
2695                 ("--max-count=" . $maxcount),
2696                 ("--skip=" . $skip),
2697                 @extra_options,
2698                 $commit_id,
2699                 "--",
2700                 ($filename ? ($filename) : ())
2701                 or die_error(500, "Open git-rev-list failed");
2702         while (my $line = <$fd>) {
2703                 my %co = parse_commit_text($line);
2704                 push @cos, \%co;
2705         }
2706         close $fd;
2707
2708         return wantarray ? @cos : \@cos;
2709 }
2710
2711 # parse line of git-diff-tree "raw" output
2712 sub parse_difftree_raw_line {
2713         my $line = shift;
2714         my %res;
2715
2716         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2717         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2718         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2719                 $res{'from_mode'} = $1;
2720                 $res{'to_mode'} = $2;
2721                 $res{'from_id'} = $3;
2722                 $res{'to_id'} = $4;
2723                 $res{'status'} = $5;
2724                 $res{'similarity'} = $6;
2725                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2726                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2727                 } else {
2728                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2729                 }
2730         }
2731         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2732         # combined diff (for merge commit)
2733         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2734                 $res{'nparents'}  = length($1);
2735                 $res{'from_mode'} = [ split(' ', $2) ];
2736                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2737                 $res{'from_id'} = [ split(' ', $3) ];
2738                 $res{'to_id'} = pop @{$res{'from_id'}};
2739                 $res{'status'} = [ split('', $4) ];
2740                 $res{'to_file'} = unquote($5);
2741         }
2742         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2743         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2744                 $res{'commit'} = $1;
2745         }
2746
2747         return wantarray ? %res : \%res;
2748 }
2749
2750 # wrapper: return parsed line of git-diff-tree "raw" output
2751 # (the argument might be raw line, or parsed info)
2752 sub parsed_difftree_line {
2753         my $line_or_ref = shift;
2754
2755         if (ref($line_or_ref) eq "HASH") {
2756                 # pre-parsed (or generated by hand)
2757                 return $line_or_ref;
2758         } else {
2759                 return parse_difftree_raw_line($line_or_ref);
2760         }
2761 }
2762
2763 # parse line of git-ls-tree output
2764 sub parse_ls_tree_line {
2765         my $line = shift;
2766         my %opts = @_;
2767         my %res;
2768
2769         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2770         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2771
2772         $res{'mode'} = $1;
2773         $res{'type'} = $2;
2774         $res{'hash'} = $3;
2775         if ($opts{'-z'}) {
2776                 $res{'name'} = $4;
2777         } else {
2778                 $res{'name'} = unquote($4);
2779         }
2780
2781         return wantarray ? %res : \%res;
2782 }
2783
2784 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2785 sub parse_from_to_diffinfo {
2786         my ($diffinfo, $from, $to, @parents) = @_;
2787
2788         if ($diffinfo->{'nparents'}) {
2789                 # combined diff
2790                 $from->{'file'} = [];
2791                 $from->{'href'} = [];
2792                 fill_from_file_info($diffinfo, @parents)
2793                         unless exists $diffinfo->{'from_file'};
2794                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2795                         $from->{'file'}[$i] =
2796                                 defined $diffinfo->{'from_file'}[$i] ?
2797                                         $diffinfo->{'from_file'}[$i] :
2798                                         $diffinfo->{'to_file'};
2799                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2800                                 $from->{'href'}[$i] = href(action=>"blob",
2801                                                            hash_base=>$parents[$i],
2802                                                            hash=>$diffinfo->{'from_id'}[$i],
2803                                                            file_name=>$from->{'file'}[$i]);
2804                         } else {
2805                                 $from->{'href'}[$i] = undef;
2806                         }
2807                 }
2808         } else {
2809                 # ordinary (not combined) diff
2810                 $from->{'file'} = $diffinfo->{'from_file'};
2811                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2812                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2813                                                hash=>$diffinfo->{'from_id'},
2814                                                file_name=>$from->{'file'});
2815                 } else {
2816                         delete $from->{'href'};
2817                 }
2818         }
2819
2820         $to->{'file'} = $diffinfo->{'to_file'};
2821         if (!is_deleted($diffinfo)) { # file exists in result
2822                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2823                                      hash=>$diffinfo->{'to_id'},
2824                                      file_name=>$to->{'file'});
2825         } else {
2826                 delete $to->{'href'};
2827         }
2828 }
2829
2830 ## ......................................................................
2831 ## parse to array of hashes functions
2832
2833 sub git_get_heads_list {
2834         my $limit = shift;
2835         my @headslist;
2836
2837         open my $fd, '-|', git_cmd(), 'for-each-ref',
2838                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2839                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2840                 'refs/heads'
2841                 or return;
2842         while (my $line = <$fd>) {
2843                 my %ref_item;
2844
2845                 chomp $line;
2846                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2847                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2848                 my ($committer, $epoch, $tz) =
2849                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2850                 $ref_item{'fullname'}  = $name;
2851                 $name =~ s!^refs/heads/!!;
2852
2853                 $ref_item{'name'}  = $name;
2854                 $ref_item{'id'}    = $hash;
2855                 $ref_item{'title'} = $title || '(no commit message)';
2856                 $ref_item{'epoch'} = $epoch;
2857                 if ($epoch) {
2858                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2859                 } else {
2860                         $ref_item{'age'} = "unknown";
2861                 }
2862
2863                 push @headslist, \%ref_item;
2864         }
2865         close $fd;
2866
2867         return wantarray ? @headslist : \@headslist;
2868 }
2869
2870 sub git_get_tags_list {
2871         my $limit = shift;
2872         my @tagslist;
2873
2874         open my $fd, '-|', git_cmd(), 'for-each-ref',
2875                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2876                 '--format=%(objectname) %(objecttype) %(refname) '.
2877                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2878                 'refs/tags'
2879                 or return;
2880         while (my $line = <$fd>) {
2881                 my %ref_item;
2882
2883                 chomp $line;
2884                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2885                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2886                 my ($creator, $epoch, $tz) =
2887                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2888                 $ref_item{'fullname'} = $name;
2889                 $name =~ s!^refs/tags/!!;
2890
2891                 $ref_item{'type'} = $type;
2892                 $ref_item{'id'} = $id;
2893                 $ref_item{'name'} = $name;
2894                 if ($type eq "tag") {
2895                         $ref_item{'subject'} = $title;
2896                         $ref_item{'reftype'} = $reftype;
2897                         $ref_item{'refid'}   = $refid;
2898                 } else {
2899                         $ref_item{'reftype'} = $type;
2900                         $ref_item{'refid'}   = $id;
2901                 }
2902
2903                 if ($type eq "tag" || $type eq "commit") {
2904                         $ref_item{'epoch'} = $epoch;
2905                         if ($epoch) {
2906                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2907                         } else {
2908                                 $ref_item{'age'} = "unknown";
2909                         }
2910                 }
2911
2912                 push @tagslist, \%ref_item;
2913         }
2914         close $fd;
2915
2916         return wantarray ? @tagslist : \@tagslist;
2917 }
2918
2919 ## ----------------------------------------------------------------------
2920 ## filesystem-related functions
2921
2922 sub get_file_owner {
2923         my $path = shift;
2924
2925         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2926         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2927         if (!defined $gcos) {
2928                 return undef;
2929         }
2930         my $owner = $gcos;
2931         $owner =~ s/[,;].*$//;
2932         return to_utf8($owner);
2933 }
2934
2935 # assume that file exists
2936 sub insert_file {
2937         my $filename = shift;
2938
2939         open my $fd, '<', $filename;
2940         print map { to_utf8($_) } <$fd>;
2941         close $fd;
2942 }
2943
2944 ## ......................................................................
2945 ## mimetype related functions
2946
2947 sub mimetype_guess_file {
2948         my $filename = shift;
2949         my $mimemap = shift;
2950         -r $mimemap or return undef;
2951
2952         my %mimemap;
2953         open(my $mh, '<', $mimemap) or return undef;
2954         while (<$mh>) {
2955                 next if m/^#/; # skip comments
2956                 my ($mimetype, $exts) = split(/\t+/);
2957                 if (defined $exts) {
2958                         my @exts = split(/\s+/, $exts);
2959                         foreach my $ext (@exts) {
2960                                 $mimemap{$ext} = $mimetype;
2961                         }
2962                 }
2963         }
2964         close($mh);
2965
2966         $filename =~ /\.([^.]*)$/;
2967         return $mimemap{$1};
2968 }
2969
2970 sub mimetype_guess {
2971         my $filename = shift;
2972         my $mime;
2973         $filename =~ /\./ or return undef;
2974
2975         if ($mimetypes_file) {
2976                 my $file = $mimetypes_file;
2977                 if ($file !~ m!^/!) { # if it is relative path
2978                         # it is relative to project
2979                         $file = "$projectroot/$project/$file";
2980                 }
2981                 $mime = mimetype_guess_file($filename, $file);
2982         }
2983         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2984         return $mime;
2985 }
2986
2987 sub blob_mimetype {
2988         my $fd = shift;
2989         my $filename = shift;
2990
2991         if ($filename) {
2992                 my $mime = mimetype_guess($filename);
2993                 $mime and return $mime;
2994         }
2995
2996         # just in case
2997         return $default_blob_plain_mimetype unless $fd;
2998
2999         if (-T $fd) {
3000                 return 'text/plain';
3001         } elsif (! $filename) {
3002                 return 'application/octet-stream';
3003         } elsif ($filename =~ m/\.png$/i) {
3004                 return 'image/png';
3005         } elsif ($filename =~ m/\.gif$/i) {
3006                 return 'image/gif';
3007         } elsif ($filename =~ m/\.jpe?g$/i) {
3008                 return 'image/jpeg';
3009         } else {
3010                 return 'application/octet-stream';
3011         }
3012 }
3013
3014 sub blob_contenttype {
3015         my ($fd, $file_name, $type) = @_;
3016
3017         $type ||= blob_mimetype($fd, $file_name);
3018         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3019                 $type .= "; charset=$default_text_plain_charset";
3020         }
3021
3022         return $type;
3023 }
3024
3025 ## ======================================================================
3026 ## functions printing HTML: header, footer, error page
3027
3028 sub git_header_html {
3029         my $status = shift || "200 OK";
3030         my $expires = shift;
3031
3032         my $title = "$site_name";
3033         if (defined $project) {
3034                 $title .= " - " . to_utf8($project);
3035                 if (defined $action) {
3036                         $title .= "/$action";
3037                         if (defined $file_name) {
3038                                 $title .= " - " . esc_path($file_name);
3039                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3040                                         $title .= "/";
3041                                 }
3042                         }
3043                 }
3044         }
3045         my $content_type;
3046         # require explicit support from the UA if we are to send the page as
3047         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3048         # we have to do this because MSIE sometimes globs '*/*', pretending to
3049         # support xhtml+xml but choking when it gets what it asked for.
3050         if (defined $cgi->http('HTTP_ACCEPT') &&
3051             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3052             $cgi->Accept('application/xhtml+xml') != 0) {
3053                 $content_type = 'application/xhtml+xml';
3054         } else {
3055                 $content_type = 'text/html';
3056         }
3057         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3058                            -status=> $status, -expires => $expires);
3059         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3060         print <<EOF;
3061 <?xml version="1.0" encoding="utf-8"?>
3062 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3063 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3064 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3065 <!-- git core binaries version $git_version -->
3066 <head>
3067 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3068 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3069 <meta name="robots" content="index, nofollow"/>
3070 <title>$title</title>
3071 EOF
3072         # the stylesheet, favicon etc urls won't work correctly with path_info
3073         # unless we set the appropriate base URL
3074         if ($ENV{'PATH_INFO'}) {
3075                 print "<base href=\"".esc_url($base_url)."\" />\n";
3076         }
3077         # print out each stylesheet that exist, providing backwards capability
3078         # for those people who defined $stylesheet in a config file
3079         if (defined $stylesheet) {
3080                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3081         } else {
3082                 foreach my $stylesheet (@stylesheets) {
3083                         next unless $stylesheet;
3084                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3085                 }
3086         }
3087         if (defined $project) {
3088                 my %href_params = get_feed_info();
3089                 if (!exists $href_params{'-title'}) {
3090                         $href_params{'-title'} = 'log';
3091                 }
3092
3093                 foreach my $format qw(RSS Atom) {
3094                         my $type = lc($format);
3095                         my %link_attr = (
3096                                 '-rel' => 'alternate',
3097                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3098                                 '-type' => "application/$type+xml"
3099                         );
3100
3101                         $href_params{'action'} = $type;
3102                         $link_attr{'-href'} = href(%href_params);
3103                         print "<link ".
3104                               "rel=\"$link_attr{'-rel'}\" ".
3105                               "title=\"$link_attr{'-title'}\" ".
3106                               "href=\"$link_attr{'-href'}\" ".
3107                               "type=\"$link_attr{'-type'}\" ".
3108                               "/>\n";
3109
3110                         $href_params{'extra_options'} = '--no-merges';
3111                         $link_attr{'-href'} = href(%href_params);
3112                         $link_attr{'-title'} .= ' (no merges)';
3113                         print "<link ".
3114                               "rel=\"$link_attr{'-rel'}\" ".
3115                               "title=\"$link_attr{'-title'}\" ".
3116                               "href=\"$link_attr{'-href'}\" ".
3117                               "type=\"$link_attr{'-type'}\" ".
3118                               "/>\n";
3119                 }
3120
3121         } else {
3122                 printf('<link rel="alternate" title="%s projects list" '.
3123                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3124                        $site_name, href(project=>undef, action=>"project_index"));
3125                 printf('<link rel="alternate" title="%s projects feeds" '.
3126                        'href="%s" type="text/x-opml" />'."\n",
3127                        $site_name, href(project=>undef, action=>"opml"));
3128         }
3129         if (defined $favicon) {
3130                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3131         }
3132
3133         print "</head>\n" .
3134               "<body>\n";
3135
3136         if (-f $site_header) {
3137                 insert_file($site_header);
3138         }
3139
3140         print "<div class=\"page_header\">\n" .
3141               $cgi->a({-href => esc_url($logo_url),
3142                        -title => $logo_label},
3143                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3144         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3145         if (defined $project) {
3146                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3147                 if (defined $action) {
3148                         print " / $action";
3149                 }
3150                 print "\n";
3151         }
3152         print "</div>\n";
3153
3154         my $have_search = gitweb_check_feature('search');
3155         if (defined $project && $have_search) {
3156                 if (!defined $searchtext) {
3157                         $searchtext = "";
3158                 }
3159                 my $search_hash;
3160                 if (defined $hash_base) {
3161                         $search_hash = $hash_base;
3162                 } elsif (defined $hash) {
3163                         $search_hash = $hash;
3164                 } else {
3165                         $search_hash = "HEAD";
3166                 }
3167                 my $action = $my_uri;
3168                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3169                 if ($use_pathinfo) {
3170                         $action .= "/".esc_url($project);
3171                 }
3172                 print $cgi->startform(-method => "get", -action => $action) .
3173                       "<div class=\"search\">\n" .
3174                       (!$use_pathinfo &&
3175                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3176                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3177                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3178                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3179                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3180                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3181                       " search:\n",
3182                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3183                       "<span title=\"Extended regular expression\">" .
3184                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3185                                      -checked => $search_use_regexp) .
3186                       "</span>" .
3187                       "</div>" .
3188                       $cgi->end_form() . "\n";
3189         }
3190 }
3191
3192 sub git_footer_html {
3193         my $feed_class = 'rss_logo';
3194
3195         print "<div class=\"page_footer\">\n";
3196         if (defined $project) {
3197                 my $descr = git_get_project_description($project);
3198                 if (defined $descr) {
3199                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3200                 }
3201
3202                 my %href_params = get_feed_info();
3203                 if (!%href_params) {
3204                         $feed_class .= ' generic';
3205                 }
3206                 $href_params{'-title'} ||= 'log';
3207
3208                 foreach my $format qw(RSS Atom) {
3209                         $href_params{'action'} = lc($format);
3210                         print $cgi->a({-href => href(%href_params),
3211                                       -title => "$href_params{'-title'} $format feed",
3212                                       -class => $feed_class}, $format)."\n";
3213                 }
3214
3215         } else {
3216                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3217                               -class => $feed_class}, "OPML") . " ";
3218                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3219                               -class => $feed_class}, "TXT") . "\n";
3220         }
3221         print "</div>\n"; # class="page_footer"
3222
3223         if (defined $t0 && gitweb_check_feature('timed')) {
3224                 print "<div id=\"generating_info\">\n";
3225                 print 'This page took '.
3226                       '<span id="generating_time" class="time_span">'.
3227                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3228                       ' seconds </span>'.
3229                       ' and '.
3230                       '<span id="generating_cmd">'.
3231                       $number_of_git_cmds.
3232                       '</span> git commands '.
3233                       " to generate.\n";
3234                 print "</div>\n"; # class="page_footer"
3235         }
3236
3237         if (-f $site_footer) {
3238                 insert_file($site_footer);
3239         }
3240
3241         print "</body>\n" .
3242               "</html>";
3243 }
3244
3245 # die_error(<http_status_code>, <error_message>)
3246 # Example: die_error(404, 'Hash not found')
3247 # By convention, use the following status codes (as defined in RFC 2616):
3248 # 400: Invalid or missing CGI parameters, or
3249 #      requested object exists but has wrong type.
3250 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3251 #      this server or project.
3252 # 404: Requested object/revision/project doesn't exist.
3253 # 500: The server isn't configured properly, or
3254 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3255 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3256 sub die_error {
3257         my $status = shift || 500;
3258         my $error = shift || "Internal server error";
3259
3260         my %http_responses = (400 => '400 Bad Request',
3261                               403 => '403 Forbidden',
3262                               404 => '404 Not Found',
3263                               500 => '500 Internal Server Error');
3264         git_header_html($http_responses{$status});
3265         print <<EOF;
3266 <div class="page_body">
3267 <br /><br />
3268 $status - $error
3269 <br />
3270 </div>
3271 EOF
3272         git_footer_html();
3273         exit;
3274 }
3275
3276 ## ----------------------------------------------------------------------
3277 ## functions printing or outputting HTML: navigation
3278
3279 sub git_print_page_nav {
3280         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3281         $extra = '' if !defined $extra; # pager or formats
3282
3283         my @navs = qw(summary shortlog log commit commitdiff tree);
3284         if ($suppress) {
3285                 @navs = grep { $_ ne $suppress } @navs;
3286         }
3287
3288         my %arg = map { $_ => {action=>$_} } @navs;
3289         if (defined $head) {
3290                 for (qw(commit commitdiff)) {
3291                         $arg{$_}{'hash'} = $head;
3292                 }
3293                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3294                         for (qw(shortlog log)) {
3295                                 $arg{$_}{'hash'} = $head;
3296                         }
3297                 }
3298         }
3299
3300         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3301         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3302
3303         my @actions = gitweb_get_feature('actions');
3304         my %repl = (
3305                 '%' => '%',
3306                 'n' => $project,         # project name
3307                 'f' => $git_dir,         # project path within filesystem
3308                 'h' => $treehead || '',  # current hash ('h' parameter)
3309                 'b' => $treebase || '',  # hash base ('hb' parameter)
3310         );
3311         while (@actions) {
3312                 my ($label, $link, $pos) = splice(@actions,0,3);
3313                 # insert
3314                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3315                 # munch munch
3316                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3317                 $arg{$label}{'_href'} = $link;
3318         }
3319
3320         print "<div class=\"page_nav\">\n" .
3321                 (join " | ",
3322                  map { $_ eq $current ?
3323                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3324                  } @navs);
3325         print "<br/>\n$extra<br/>\n" .
3326               "</div>\n";
3327 }
3328
3329 sub format_paging_nav {
3330         my ($action, $hash, $head, $page, $has_next_link) = @_;
3331         my $paging_nav;
3332
3333
3334         if ($hash ne $head || $page) {
3335                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3336         } else {
3337                 $paging_nav .= "HEAD";
3338         }
3339
3340         if ($page > 0) {
3341                 $paging_nav .= " &sdot; " .
3342                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3343                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3344         } else {
3345                 $paging_nav .= " &sdot; prev";
3346         }
3347
3348         if ($has_next_link) {
3349                 $paging_nav .= " &sdot; " .
3350                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3351                                  -accesskey => "n", -title => "Alt-n"}, "next");
3352         } else {
3353                 $paging_nav .= " &sdot; next";
3354         }
3355
3356         return $paging_nav;
3357 }
3358
3359 ## ......................................................................
3360 ## functions printing or outputting HTML: div
3361
3362 sub git_print_header_div {
3363         my ($action, $title, $hash, $hash_base) = @_;
3364         my %args = ();
3365
3366         $args{'action'} = $action;
3367         $args{'hash'} = $hash if $hash;
3368         $args{'hash_base'} = $hash_base if $hash_base;
3369
3370         print "<div class=\"header\">\n" .
3371               $cgi->a({-href => href(%args), -class => "title"},
3372               $title ? $title : $action) .
3373               "\n</div>\n";
3374 }
3375
3376 sub print_local_time {
3377         my %date = @_;
3378         if ($date{'hour_local'} < 6) {
3379                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3380                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3381         } else {
3382                 printf(" (%02d:%02d %s)",
3383                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3384         }
3385 }
3386
3387 # Outputs the author name and date in long form
3388 sub git_print_authorship {
3389         my $co = shift;
3390         my %opts = @_;
3391         my $tag = $opts{-tag} || 'div';
3392
3393         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3394         print "<$tag class=\"author_date\">" .
3395               esc_html($co->{'author_name'}) .
3396               " [$ad{'rfc2822'}";
3397         print_local_time(%ad) if ($opts{-localtime});
3398         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3399                   . "</$tag>\n";
3400 }
3401
3402 # Outputs table rows containing the full author or committer information,
3403 # in the format expected for 'commit' view (& similia).
3404 # Parameters are a commit hash reference, followed by the list of people
3405 # to output information for. If the list is empty it defalts to both
3406 # author and committer.
3407 sub git_print_authorship_rows {
3408         my $co = shift;
3409         # too bad we can't use @people = @_ || ('author', 'committer')
3410         my @people = @_;
3411         @people = ('author', 'committer') unless @people;
3412         foreach my $who (@people) {
3413                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3414                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3415                       "<td rowspan=\"2\">" .
3416                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3417                       "</td></tr>\n" .
3418                       "<tr>" .
3419                       "<td></td><td> $wd{'rfc2822'}";
3420                 print_local_time(%wd);
3421                 print "</td>" .
3422                       "</tr>\n";
3423         }
3424 }
3425
3426 sub git_print_page_path {
3427         my $name = shift;
3428         my $type = shift;
3429         my $hb = shift;
3430
3431
3432         print "<div class=\"page_path\">";
3433         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3434                       -title => 'tree root'}, to_utf8("[$project]"));
3435         print " / ";
3436         if (defined $name) {
3437                 my @dirname = split '/', $name;
3438                 my $basename = pop @dirname;
3439                 my $fullname = '';
3440
3441                 foreach my $dir (@dirname) {
3442                         $fullname .= ($fullname ? '/' : '') . $dir;
3443                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3444                                                      hash_base=>$hb),
3445                                       -title => $fullname}, esc_path($dir));
3446                         print " / ";
3447                 }
3448                 if (defined $type && $type eq 'blob') {
3449                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3450                                                      hash_base=>$hb),
3451                                       -title => $name}, esc_path($basename));
3452                 } elsif (defined $type && $type eq 'tree') {
3453                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3454                                                      hash_base=>$hb),
3455                                       -title => $name}, esc_path($basename));
3456                         print " / ";
3457                 } else {
3458                         print esc_path($basename);
3459                 }
3460         }
3461         print "<br/></div>\n";
3462 }
3463
3464 sub git_print_log {
3465         my $log = shift;
3466         my %opts = @_;
3467
3468         if ($opts{'-remove_title'}) {
3469                 # remove title, i.e. first line of log
3470                 shift @$log;
3471         }
3472         # remove leading empty lines
3473         while (defined $log->[0] && $log->[0] eq "") {
3474                 shift @$log;
3475         }
3476
3477         # print log
3478         my $signoff = 0;
3479         my $empty = 0;
3480         foreach my $line (@$log) {
3481                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3482                         $signoff = 1;
3483                         $empty = 0;
3484                         if (! $opts{'-remove_signoff'}) {
3485                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3486                                 next;
3487                         } else {
3488                                 # remove signoff lines
3489                                 next;
3490                         }
3491                 } else {
3492                         $signoff = 0;
3493                 }
3494
3495                 # print only one empty line
3496                 # do not print empty line after signoff
3497                 if ($line eq "") {
3498                         next if ($empty || $signoff);
3499                         $empty = 1;
3500                 } else {
3501                         $empty = 0;
3502                 }
3503
3504                 print format_log_line_html($line) . "<br/>\n";
3505         }
3506
3507         if ($opts{'-final_empty_line'}) {
3508                 # end with single empty line
3509                 print "<br/>\n" unless $empty;
3510         }
3511 }
3512
3513 # return link target (what link points to)
3514 sub git_get_link_target {
3515         my $hash = shift;
3516         my $link_target;
3517
3518         # read link
3519         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3520                 or return;
3521         {
3522                 local $/ = undef;
3523                 $link_target = <$fd>;
3524         }
3525         close $fd
3526                 or return;
3527
3528         return $link_target;
3529 }
3530
3531 # given link target, and the directory (basedir) the link is in,
3532 # return target of link relative to top directory (top tree);
3533 # return undef if it is not possible (including absolute links).
3534 sub normalize_link_target {
3535         my ($link_target, $basedir) = @_;
3536
3537         # absolute symlinks (beginning with '/') cannot be normalized
3538         return if (substr($link_target, 0, 1) eq '/');
3539
3540         # normalize link target to path from top (root) tree (dir)
3541         my $path;
3542         if ($basedir) {
3543                 $path = $basedir . '/' . $link_target;
3544         } else {
3545                 # we are in top (root) tree (dir)
3546                 $path = $link_target;
3547         }
3548
3549         # remove //, /./, and /../
3550         my @path_parts;
3551         foreach my $part (split('/', $path)) {
3552                 # discard '.' and ''
3553                 next if (!$part || $part eq '.');
3554                 # handle '..'
3555                 if ($part eq '..') {
3556                         if (@path_parts) {
3557                                 pop @path_parts;
3558                         } else {
3559                                 # link leads outside repository (outside top dir)
3560                                 return;
3561                         }
3562                 } else {
3563                         push @path_parts, $part;
3564                 }
3565         }
3566         $path = join('/', @path_parts);
3567
3568         return $path;
3569 }
3570
3571 # print tree entry (row of git_tree), but without encompassing <tr> element
3572 sub git_print_tree_entry {
3573         my ($t, $basedir, $hash_base, $have_blame) = @_;
3574
3575         my %base_key = ();
3576         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3577
3578         # The format of a table row is: mode list link.  Where mode is
3579         # the mode of the entry, list is the name of the entry, an href,
3580         # and link is the action links of the entry.
3581
3582         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3583         if ($t->{'type'} eq "blob") {
3584                 print "<td class=\"list\">" .
3585                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3586                                                file_name=>"$basedir$t->{'name'}", %base_key),
3587                                 -class => "list"}, esc_path($t->{'name'}));
3588                 if (S_ISLNK(oct $t->{'mode'})) {
3589                         my $link_target = git_get_link_target($t->{'hash'});
3590                         if ($link_target) {
3591                                 my $norm_target = normalize_link_target($link_target, $basedir);
3592                                 if (defined $norm_target) {
3593                                         print " -> " .
3594                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3595                                                                      file_name=>$norm_target),
3596                                                        -title => $norm_target}, esc_path($link_target));
3597                                 } else {
3598                                         print " -> " . esc_path($link_target);
3599                                 }
3600                         }
3601                 }
3602                 print "</td>\n";
3603                 print "<td class=\"link\">";
3604                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3605                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3606                               "blob");
3607                 if ($have_blame) {
3608                         print " | " .
3609                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3610                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3611                                       "blame");
3612                 }
3613                 if (defined $hash_base) {
3614                         print " | " .
3615                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3616                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3617                                       "history");
3618                 }
3619                 print " | " .
3620                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3621                                                file_name=>"$basedir$t->{'name'}")},
3622                                 "raw");
3623                 print "</td>\n";
3624
3625         } elsif ($t->{'type'} eq "tree") {
3626                 print "<td class=\"list\">";
3627                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3628                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3629                               esc_path($t->{'name'}));
3630                 print "</td>\n";
3631                 print "<td class=\"link\">";
3632                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3633                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3634                               "tree");
3635                 if (defined $hash_base) {
3636                         print " | " .
3637                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3638                                                      file_name=>"$basedir$t->{'name'}")},
3639                                       "history");
3640                 }
3641                 print "</td>\n";
3642         } else {
3643                 # unknown object: we can only present history for it
3644                 # (this includes 'commit' object, i.e. submodule support)
3645                 print "<td class=\"list\">" .
3646                       esc_path($t->{'name'}) .
3647                       "</td>\n";
3648                 print "<td class=\"link\">";
3649                 if (defined $hash_base) {
3650                         print $cgi->a({-href => href(action=>"history",
3651                                                      hash_base=>$hash_base,
3652                                                      file_name=>"$basedir$t->{'name'}")},
3653                                       "history");
3654                 }
3655                 print "</td>\n";
3656         }
3657 }
3658
3659 ## ......................................................................
3660 ## functions printing large fragments of HTML
3661
3662 # get pre-image filenames for merge (combined) diff
3663 sub fill_from_file_info {
3664         my ($diff, @parents) = @_;
3665
3666         $diff->{'from_file'} = [ ];
3667         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3668         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3669                 if ($diff->{'status'}[$i] eq 'R' ||
3670                     $diff->{'status'}[$i] eq 'C') {
3671                         $diff->{'from_file'}[$i] =
3672                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3673                 }
3674         }
3675
3676         return $diff;
3677 }
3678
3679 # is current raw difftree line of file deletion
3680 sub is_deleted {
3681         my $diffinfo = shift;
3682
3683         return $diffinfo->{'to_id'} eq ('0' x 40);
3684 }
3685
3686 # does patch correspond to [previous] difftree raw line
3687 # $diffinfo  - hashref of parsed raw diff format
3688 # $patchinfo - hashref of parsed patch diff format
3689 #              (the same keys as in $diffinfo)
3690 sub is_patch_split {
3691         my ($diffinfo, $patchinfo) = @_;
3692
3693         return defined $diffinfo && defined $patchinfo
3694                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3695 }
3696
3697
3698 sub git_difftree_body {
3699         my ($difftree, $hash, @parents) = @_;
3700         my ($parent) = $parents[0];
3701         my $have_blame = gitweb_check_feature('blame');
3702         print "<div class=\"list_head\">\n";
3703         if ($#{$difftree} > 10) {
3704                 print(($#{$difftree} + 1) . " files changed:\n");
3705         }
3706         print "</div>\n";
3707
3708         print "<table class=\"" .
3709               (@parents > 1 ? "combined " : "") .
3710               "diff_tree\">\n";
3711
3712         # header only for combined diff in 'commitdiff' view
3713         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3714         if ($has_header) {
3715                 # table header
3716                 print "<thead><tr>\n" .
3717                        "<th></th><th></th>\n"; # filename, patchN link
3718                 for (my $i = 0; $i < @parents; $i++) {
3719                         my $par = $parents[$i];
3720                         print "<th>" .
3721                               $cgi->a({-href => href(action=>"commitdiff",
3722                                                      hash=>$hash, hash_parent=>$par),
3723                                        -title => 'commitdiff to parent number ' .
3724                                                   ($i+1) . ': ' . substr($par,0,7)},
3725                                       $i+1) .
3726                               "&nbsp;</th>\n";
3727                 }
3728                 print "</tr></thead>\n<tbody>\n";
3729         }
3730
3731         my $alternate = 1;
3732         my $patchno = 0;
3733         foreach my $line (@{$difftree}) {
3734                 my $diff = parsed_difftree_line($line);
3735
3736                 if ($alternate) {
3737                         print "<tr class=\"dark\">\n";
3738                 } else {
3739                         print "<tr class=\"light\">\n";
3740                 }
3741                 $alternate ^= 1;
3742
3743                 if (exists $diff->{'nparents'}) { # combined diff
3744
3745                         fill_from_file_info($diff, @parents)
3746                                 unless exists $diff->{'from_file'};
3747
3748                         if (!is_deleted($diff)) {
3749                                 # file exists in the result (child) commit
3750                                 print "<td>" .
3751                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3752                                                              file_name=>$diff->{'to_file'},
3753                                                              hash_base=>$hash),
3754                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3755                                       "</td>\n";
3756                         } else {
3757                                 print "<td>" .
3758                                       esc_path($diff->{'to_file'}) .
3759                                       "</td>\n";
3760                         }
3761
3762                         if ($action eq 'commitdiff') {
3763                                 # link to patch
3764                                 $patchno++;
3765                                 print "<td class=\"link\">" .
3766                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3767                                       " | " .
3768                                       "</td>\n";
3769                         }
3770
3771                         my $has_history = 0;
3772                         my $not_deleted = 0;
3773                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3774                                 my $hash_parent = $parents[$i];
3775                                 my $from_hash = $diff->{'from_id'}[$i];
3776                                 my $from_path = $diff->{'from_file'}[$i];
3777                                 my $status = $diff->{'status'}[$i];
3778
3779                                 $has_history ||= ($status ne 'A');
3780                                 $not_deleted ||= ($status ne 'D');
3781
3782                                 if ($status eq 'A') {
3783                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3784                                 } elsif ($status eq 'D') {
3785                                         print "<td class=\"link\">" .
3786                                               $cgi->a({-href => href(action=>"blob",
3787                                                                      hash_base=>$hash,
3788                                                                      hash=>$from_hash,
3789                                                                      file_name=>$from_path)},
3790                                                       "blob" . ($i+1)) .
3791                                               " | </td>\n";
3792                                 } else {
3793                                         if ($diff->{'to_id'} eq $from_hash) {
3794                                                 print "<td class=\"link nochange\">";
3795                                         } else {
3796                                                 print "<td class=\"link\">";
3797                                         }
3798                                         print $cgi->a({-href => href(action=>"blobdiff",
3799                                                                      hash=>$diff->{'to_id'},
3800                                                                      hash_parent=>$from_hash,
3801                                                                      hash_base=>$hash,
3802                                                                      hash_parent_base=>$hash_parent,
3803                                                                      file_name=>$diff->{'to_file'},
3804                                                                      file_parent=>$from_path)},
3805                                                       "diff" . ($i+1)) .
3806                                               " | </td>\n";
3807                                 }
3808                         }
3809
3810                         print "<td class=\"link\">";
3811                         if ($not_deleted) {
3812                                 print $cgi->a({-href => href(action=>"blob",
3813                                                              hash=>$diff->{'to_id'},
3814                                                              file_name=>$diff->{'to_file'},
3815                                                              hash_base=>$hash)},
3816                                               "blob");
3817                                 print " | " if ($has_history);
3818                         }
3819                         if ($has_history) {
3820                                 print $cgi->a({-href => href(action=>"history",
3821                                                              file_name=>$diff->{'to_file'},
3822                                                              hash_base=>$hash)},
3823                                               "history");
3824                         }
3825                         print "</td>\n";
3826
3827                         print "</tr>\n";
3828                         next; # instead of 'else' clause, to avoid extra indent
3829                 }
3830                 # else ordinary diff
3831
3832                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3833                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3834                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3835                         $to_mode_oct = oct $diff->{'to_mode'};
3836                         if (S_ISREG($to_mode_oct)) { # only for regular file
3837                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3838                         }
3839                         $to_file_type = file_type($diff->{'to_mode'});
3840                 }
3841                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3842                         $from_mode_oct = oct $diff->{'from_mode'};
3843                         if (S_ISREG($to_mode_oct)) { # only for regular file
3844                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3845                         }
3846                         $from_file_type = file_type($diff->{'from_mode'});
3847                 }
3848
3849                 if ($diff->{'status'} eq "A") { # created
3850                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3851                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3852                         $mode_chng   .= "]</span>";
3853                         print "<td>";
3854                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3855                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3856                                       -class => "list"}, esc_path($diff->{'file'}));
3857                         print "</td>\n";
3858                         print "<td>$mode_chng</td>\n";
3859                         print "<td class=\"link\">";
3860                         if ($action eq 'commitdiff') {
3861                                 # link to patch
3862                                 $patchno++;
3863                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3864                                 print " | ";
3865                         }
3866                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3867                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3868                                       "blob");
3869                         print "</td>\n";
3870
3871                 } elsif ($diff->{'status'} eq "D") { # deleted
3872                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3873                         print "<td>";
3874                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3875                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3876                                        -class => "list"}, esc_path($diff->{'file'}));
3877                         print "</td>\n";
3878                         print "<td>$mode_chng</td>\n";
3879                         print "<td class=\"link\">";
3880                         if ($action eq 'commitdiff') {
3881                                 # link to patch
3882                                 $patchno++;
3883                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3884                                 print " | ";
3885                         }
3886                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3887                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3888                                       "blob") . " | ";
3889                         if ($have_blame) {
3890                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3891                                                              file_name=>$diff->{'file'})},
3892                                               "blame") . " | ";
3893                         }
3894                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3895                                                      file_name=>$diff->{'file'})},
3896                                       "history");
3897                         print "</td>\n";
3898
3899                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3900                         my $mode_chnge = "";
3901                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3902                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3903                                 if ($from_file_type ne $to_file_type) {
3904                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3905                                 }
3906                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3907                                         if ($from_mode_str && $to_mode_str) {
3908                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3909                                         } elsif ($to_mode_str) {
3910                                                 $mode_chnge .= " mode: $to_mode_str";
3911                                         }
3912                                 }
3913                                 $mode_chnge .= "]</span>\n";
3914                         }
3915                         print "<td>";
3916                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3917                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3918                                       -class => "list"}, esc_path($diff->{'file'}));
3919                         print "</td>\n";
3920                         print "<td>$mode_chnge</td>\n";
3921                         print "<td class=\"link\">";
3922                         if ($action eq 'commitdiff') {
3923                                 # link to patch
3924                                 $patchno++;
3925                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3926                                       " | ";
3927                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3928                                 # "commit" view and modified file (not onlu mode changed)
3929                                 print $cgi->a({-href => href(action=>"blobdiff",
3930                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3931                                                              hash_base=>$hash, hash_parent_base=>$parent,
3932                                                              file_name=>$diff->{'file'})},
3933                                               "diff") .
3934                                       " | ";
3935                         }
3936                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3937                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3938                                        "blob") . " | ";
3939                         if ($have_blame) {
3940                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3941                                                              file_name=>$diff->{'file'})},
3942                                               "blame") . " | ";
3943                         }
3944                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3945                                                      file_name=>$diff->{'file'})},
3946                                       "history");
3947                         print "</td>\n";
3948
3949                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3950                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3951                         my $nstatus = $status_name{$diff->{'status'}};
3952                         my $mode_chng = "";
3953                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3954                                 # mode also for directories, so we cannot use $to_mode_str
3955                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3956                         }
3957                         print "<td>" .
3958                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3959                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3960                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3961                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3962                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3963                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3964                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3965                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3966                               "<td class=\"link\">";
3967                         if ($action eq 'commitdiff') {
3968                                 # link to patch
3969                                 $patchno++;
3970                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3971                                       " | ";
3972                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3973                                 # "commit" view and modified file (not only pure rename or copy)
3974                                 print $cgi->a({-href => href(action=>"blobdiff",
3975                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3976                                                              hash_base=>$hash, hash_parent_base=>$parent,
3977                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3978                                               "diff") .
3979                                       " | ";
3980                         }
3981                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3982                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3983                                       "blob") . " | ";
3984                         if ($have_blame) {
3985                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3986                                                              file_name=>$diff->{'to_file'})},
3987                                               "blame") . " | ";
3988                         }
3989                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3990                                                     file_name=>$diff->{'to_file'})},
3991                                       "history");
3992                         print "</td>\n";
3993
3994                 } # we should not encounter Unmerged (U) or Unknown (X) status
3995                 print "</tr>\n";
3996         }
3997         print "</tbody>" if $has_header;
3998         print "</table>\n";
3999 }
4000
4001 sub git_patchset_body {
4002         my ($fd, $difftree, $hash, @hash_parents) = @_;
4003         my ($hash_parent) = $hash_parents[0];
4004
4005         my $is_combined = (@hash_parents > 1);
4006         my $patch_idx = 0;
4007         my $patch_number = 0;
4008         my $patch_line;
4009         my $diffinfo;
4010         my $to_name;
4011         my (%from, %to);
4012
4013         print "<div class=\"patchset\">\n";
4014
4015         # skip to first patch
4016         while ($patch_line = <$fd>) {
4017                 chomp $patch_line;
4018
4019                 last if ($patch_line =~ m/^diff /);
4020         }
4021
4022  PATCH:
4023         while ($patch_line) {
4024
4025                 # parse "git diff" header line
4026                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4027                         # $1 is from_name, which we do not use
4028                         $to_name = unquote($2);
4029                         $to_name =~ s!^b/!!;
4030                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4031                         # $1 is 'cc' or 'combined', which we do not use
4032                         $to_name = unquote($2);
4033                 } else {
4034                         $to_name = undef;
4035                 }
4036
4037                 # check if current patch belong to current raw line
4038                 # and parse raw git-diff line if needed
4039                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4040                         # this is continuation of a split patch
4041                         print "<div class=\"patch cont\">\n";
4042                 } else {
4043                         # advance raw git-diff output if needed
4044                         $patch_idx++ if defined $diffinfo;
4045
4046                         # read and prepare patch information
4047                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4048
4049                         # compact combined diff output can have some patches skipped
4050                         # find which patch (using pathname of result) we are at now;
4051                         if ($is_combined) {
4052                                 while ($to_name ne $diffinfo->{'to_file'}) {
4053                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4054                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4055                                               "</div>\n";  # class="patch"
4056
4057                                         $patch_idx++;
4058                                         $patch_number++;
4059
4060                                         last if $patch_idx > $#$difftree;
4061                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4062                                 }
4063                         }
4064
4065                         # modifies %from, %to hashes
4066                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4067
4068                         # this is first patch for raw difftree line with $patch_idx index
4069                         # we index @$difftree array from 0, but number patches from 1
4070                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4071                 }
4072
4073                 # git diff header
4074                 #assert($patch_line =~ m/^diff /) if DEBUG;
4075                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4076                 $patch_number++;
4077                 # print "git diff" header
4078                 print format_git_diff_header_line($patch_line, $diffinfo,
4079                                                   \%from, \%to);
4080
4081                 # print extended diff header
4082                 print "<div class=\"diff extended_header\">\n";
4083         EXTENDED_HEADER:
4084                 while ($patch_line = <$fd>) {
4085                         chomp $patch_line;
4086
4087                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4088
4089                         print format_extended_diff_header_line($patch_line, $diffinfo,
4090                                                                \%from, \%to);
4091                 }
4092                 print "</div>\n"; # class="diff extended_header"
4093
4094                 # from-file/to-file diff header
4095                 if (! $patch_line) {
4096                         print "</div>\n"; # class="patch"
4097                         last PATCH;
4098                 }
4099                 next PATCH if ($patch_line =~ m/^diff /);
4100                 #assert($patch_line =~ m/^---/) if DEBUG;
4101
4102                 my $last_patch_line = $patch_line;
4103                 $patch_line = <$fd>;
4104                 chomp $patch_line;
4105                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4106
4107                 print format_diff_from_to_header($last_patch_line, $patch_line,
4108                                                  $diffinfo, \%from, \%to,
4109                                                  @hash_parents);
4110
4111                 # the patch itself
4112         LINE:
4113                 while ($patch_line = <$fd>) {
4114                         chomp $patch_line;
4115
4116                         next PATCH if ($patch_line =~ m/^diff /);
4117
4118                         print format_diff_line($patch_line, \%from, \%to);
4119                 }
4120
4121         } continue {
4122                 print "</div>\n"; # class="patch"
4123         }
4124
4125         # for compact combined (--cc) format, with chunk and patch simpliciaction
4126         # patchset might be empty, but there might be unprocessed raw lines
4127         for (++$patch_idx if $patch_number > 0;
4128              $patch_idx < @$difftree;
4129              ++$patch_idx) {
4130                 # read and prepare patch information
4131                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4132
4133                 # generate anchor for "patch" links in difftree / whatchanged part
4134                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4135                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4136                       "</div>\n";  # class="patch"
4137
4138                 $patch_number++;
4139         }
4140
4141         if ($patch_number == 0) {
4142                 if (@hash_parents > 1) {
4143                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4144                 } else {
4145                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4146                 }
4147         }
4148
4149         print "</div>\n"; # class="patchset"
4150 }
4151
4152 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4153
4154 # fills project list info (age, description, owner, forks) for each
4155 # project in the list, removing invalid projects from returned list
4156 # NOTE: modifies $projlist, but does not remove entries from it
4157 sub fill_project_list_info {
4158         my ($projlist, $check_forks) = @_;
4159         my @projects;
4160
4161         my $show_ctags = gitweb_check_feature('ctags');
4162  PROJECT:
4163         foreach my $pr (@$projlist) {
4164                 my (@activity) = git_get_last_activity($pr->{'path'});
4165                 unless (@activity) {
4166                         next PROJECT;
4167                 }
4168                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4169                 if (!defined $pr->{'descr'}) {
4170                         my $descr = git_get_project_description($pr->{'path'}) || "";
4171                         $descr = to_utf8($descr);
4172                         $pr->{'descr_long'} = $descr;
4173                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4174                 }
4175                 if (!defined $pr->{'owner'}) {
4176                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4177                 }
4178                 if ($check_forks) {
4179                         my $pname = $pr->{'path'};
4180                         if (($pname =~ s/\.git$//) &&
4181                             ($pname !~ /\/$/) &&
4182                             (-d "$projectroot/$pname")) {
4183                                 $pr->{'forks'} = "-d $projectroot/$pname";
4184                         } else {
4185                                 $pr->{'forks'} = 0;
4186                         }
4187                 }
4188                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4189                 push @projects, $pr;
4190         }
4191
4192         return @projects;
4193 }
4194
4195 # print 'sort by' <th> element, generating 'sort by $name' replay link
4196 # if that order is not selected
4197 sub print_sort_th {
4198         my ($name, $order, $header) = @_;
4199         $header ||= ucfirst($name);
4200
4201         if ($order eq $name) {
4202                 print "<th>$header</th>\n";
4203         } else {
4204                 print "<th>" .
4205                       $cgi->a({-href => href(-replay=>1, order=>$name),
4206                                -class => "header"}, $header) .
4207                       "</th>\n";
4208         }
4209 }
4210
4211 sub git_project_list_body {
4212         # actually uses global variable $project
4213         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4214
4215         my $check_forks = gitweb_check_feature('forks');
4216         my @projects = fill_project_list_info($projlist, $check_forks);
4217
4218         $order ||= $default_projects_order;
4219         $from = 0 unless defined $from;
4220         $to = $#projects if (!defined $to || $#projects < $to);
4221
4222         my %order_info = (
4223                 project => { key => 'path', type => 'str' },
4224                 descr => { key => 'descr_long', type => 'str' },
4225                 owner => { key => 'owner', type => 'str' },
4226                 age => { key => 'age', type => 'num' }
4227         );
4228         my $oi = $order_info{$order};
4229         if ($oi->{'type'} eq 'str') {
4230                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4231         } else {
4232                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4233         }
4234
4235         my $show_ctags = gitweb_check_feature('ctags');
4236         if ($show_ctags) {
4237                 my %ctags;
4238                 foreach my $p (@projects) {
4239                         foreach my $ct (keys %{$p->{'ctags'}}) {
4240                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4241                         }
4242                 }
4243                 my $cloud = git_populate_project_tagcloud(\%ctags);
4244                 print git_show_project_tagcloud($cloud, 64);
4245         }
4246
4247         print "<table class=\"project_list\">\n";
4248         unless ($no_header) {
4249                 print "<tr>\n";
4250                 if ($check_forks) {
4251                         print "<th></th>\n";
4252                 }
4253                 print_sort_th('project', $order, 'Project');
4254                 print_sort_th('descr', $order, 'Description');
4255                 print_sort_th('owner', $order, 'Owner');
4256                 print_sort_th('age', $order, 'Last Change');
4257                 print "<th></th>\n" . # for links
4258                       "</tr>\n";
4259         }
4260         my $alternate = 1;
4261         my $tagfilter = $cgi->param('by_tag');
4262         for (my $i = $from; $i <= $to; $i++) {
4263                 my $pr = $projects[$i];
4264
4265                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4266                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4267                         and not $pr->{'descr_long'} =~ /$searchtext/;
4268                 # Weed out forks or non-matching entries of search
4269                 if ($check_forks) {
4270                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4271                         $forkbase="^$forkbase" if $forkbase;
4272                         next if not $searchtext and not $tagfilter and $show_ctags
4273                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4274                 }
4275
4276                 if ($alternate) {
4277                         print "<tr class=\"dark\">\n";
4278                 } else {
4279                         print "<tr class=\"light\">\n";
4280                 }
4281                 $alternate ^= 1;
4282                 if ($check_forks) {
4283                         print "<td>";
4284                         if ($pr->{'forks'}) {
4285                                 print "<!-- $pr->{'forks'} -->\n";
4286                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4287                         }
4288                         print "</td>\n";
4289                 }
4290                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4291                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4292                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4293                                         -class => "list", -title => $pr->{'descr_long'}},
4294                                         esc_html($pr->{'descr'})) . "</td>\n" .
4295                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4296                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4297                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4298                       "<td class=\"link\">" .
4299                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4300                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4301                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4302                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4303                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4304                       "</td>\n" .
4305                       "</tr>\n";
4306         }
4307         if (defined $extra) {
4308                 print "<tr>\n";
4309                 if ($check_forks) {
4310                         print "<td></td>\n";
4311                 }
4312                 print "<td colspan=\"5\">$extra</td>\n" .
4313                       "</tr>\n";
4314         }
4315         print "</table>\n";
4316 }
4317
4318 sub git_shortlog_body {
4319         # uses global variable $project
4320         my ($commitlist, $from, $to, $refs, $extra) = @_;
4321
4322         $from = 0 unless defined $from;
4323         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4324
4325         print "<table class=\"shortlog\">\n";
4326         my $alternate = 1;
4327         for (my $i = $from; $i <= $to; $i++) {
4328                 my %co = %{$commitlist->[$i]};
4329                 my $commit = $co{'id'};
4330                 my $ref = format_ref_marker($refs, $commit);
4331                 if ($alternate) {
4332                         print "<tr class=\"dark\">\n";
4333                 } else {
4334                         print "<tr class=\"light\">\n";
4335                 }
4336                 $alternate ^= 1;
4337                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4338                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4339                       format_author_html('td', \%co, 10) . "<td>";
4340                 print format_subject_html($co{'title'}, $co{'title_short'},
4341                                           href(action=>"commit", hash=>$commit), $ref);
4342                 print "</td>\n" .
4343                       "<td class=\"link\">" .
4344                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4345                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4346                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4347                 my $snapshot_links = format_snapshot_links($commit);
4348                 if (defined $snapshot_links) {
4349                         print " | " . $snapshot_links;
4350                 }
4351                 print "</td>\n" .
4352                       "</tr>\n";
4353         }
4354         if (defined $extra) {
4355                 print "<tr>\n" .
4356                       "<td colspan=\"4\">$extra</td>\n" .
4357                       "</tr>\n";
4358         }
4359         print "</table>\n";
4360 }
4361
4362 sub git_history_body {
4363         # Warning: assumes constant type (blob or tree) during history
4364         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4365
4366         $from = 0 unless defined $from;
4367         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4368
4369         print "<table class=\"history\">\n";
4370         my $alternate = 1;
4371         for (my $i = $from; $i <= $to; $i++) {
4372                 my %co = %{$commitlist->[$i]};
4373                 if (!%co) {
4374                         next;
4375                 }
4376                 my $commit = $co{'id'};
4377
4378                 my $ref = format_ref_marker($refs, $commit);
4379
4380                 if ($alternate) {
4381                         print "<tr class=\"dark\">\n";
4382                 } else {
4383                         print "<tr class=\"light\">\n";
4384                 }
4385                 $alternate ^= 1;
4386                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4387         # shortlog:   format_author_html('td', \%co, 10)
4388                       format_author_html('td', \%co, 15, 3) . "<td>";
4389                 # originally git_history used chop_str($co{'title'}, 50)
4390                 print format_subject_html($co{'title'}, $co{'title_short'},
4391                                           href(action=>"commit", hash=>$commit), $ref);
4392                 print "</td>\n" .
4393                       "<td class=\"link\">" .
4394                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4395                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4396
4397                 if ($ftype eq 'blob') {
4398                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4399                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4400                         if (defined $blob_current && defined $blob_parent &&
4401                                         $blob_current ne $blob_parent) {
4402                                 print " | " .
4403                                         $cgi->a({-href => href(action=>"blobdiff",
4404                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4405                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4406                                                                file_name=>$file_name)},
4407                                                 "diff to current");
4408                         }
4409                 }
4410                 print "</td>\n" .
4411                       "</tr>\n";
4412         }
4413         if (defined $extra) {
4414                 print "<tr>\n" .
4415                       "<td colspan=\"4\">$extra</td>\n" .
4416                       "</tr>\n";
4417         }
4418         print "</table>\n";
4419 }
4420
4421 sub git_tags_body {
4422         # uses global variable $project
4423         my ($taglist, $from, $to, $extra) = @_;
4424         $from = 0 unless defined $from;
4425         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4426
4427         print "<table class=\"tags\">\n";
4428         my $alternate = 1;
4429         for (my $i = $from; $i <= $to; $i++) {
4430                 my $entry = $taglist->[$i];
4431                 my %tag = %$entry;
4432                 my $comment = $tag{'subject'};
4433                 my $comment_short;
4434                 if (defined $comment) {
4435                         $comment_short = chop_str($comment, 30, 5);
4436                 }
4437                 if ($alternate) {
4438                         print "<tr class=\"dark\">\n";
4439                 } else {
4440                         print "<tr class=\"light\">\n";
4441                 }
4442                 $alternate ^= 1;
4443                 if (defined $tag{'age'}) {
4444                         print "<td><i>$tag{'age'}</i></td>\n";
4445                 } else {
4446                         print "<td></td>\n";
4447                 }
4448                 print "<td>" .
4449                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4450                                -class => "list name"}, esc_html($tag{'name'})) .
4451                       "</td>\n" .
4452                       "<td>";
4453                 if (defined $comment) {
4454                         print format_subject_html($comment, $comment_short,
4455                                                   href(action=>"tag", hash=>$tag{'id'}));
4456                 }
4457                 print "</td>\n" .
4458                       "<td class=\"selflink\">";
4459                 if ($tag{'type'} eq "tag") {
4460                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4461                 } else {
4462                         print "&nbsp;";
4463                 }
4464                 print "</td>\n" .
4465                       "<td class=\"link\">" . " | " .
4466                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4467                 if ($tag{'reftype'} eq "commit") {
4468                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4469                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4470                 } elsif ($tag{'reftype'} eq "blob") {
4471                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4472                 }
4473                 print "</td>\n" .
4474                       "</tr>";
4475         }
4476         if (defined $extra) {
4477                 print "<tr>\n" .
4478                       "<td colspan=\"5\">$extra</td>\n" .
4479                       "</tr>\n";
4480         }
4481         print "</table>\n";
4482 }
4483
4484 sub git_heads_body {
4485         # uses global variable $project
4486         my ($headlist, $head, $from, $to, $extra) = @_;
4487         $from = 0 unless defined $from;
4488         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4489
4490         print "<table class=\"heads\">\n";
4491         my $alternate = 1;
4492         for (my $i = $from; $i <= $to; $i++) {
4493                 my $entry = $headlist->[$i];
4494                 my %ref = %$entry;
4495                 my $curr = $ref{'id'} eq $head;
4496                 if ($alternate) {
4497                         print "<tr class=\"dark\">\n";
4498                 } else {
4499                         print "<tr class=\"light\">\n";
4500                 }
4501                 $alternate ^= 1;
4502                 print "<td><i>$ref{'age'}</i></td>\n" .
4503                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4504                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4505                                -class => "list name"},esc_html($ref{'name'})) .
4506                       "</td>\n" .
4507                       "<td class=\"link\">" .
4508                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4509                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4510                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4511                       "</td>\n" .
4512                       "</tr>";
4513         }
4514         if (defined $extra) {
4515                 print "<tr>\n" .
4516                       "<td colspan=\"3\">$extra</td>\n" .
4517                       "</tr>\n";
4518         }
4519         print "</table>\n";
4520 }
4521
4522 sub git_search_grep_body {
4523         my ($commitlist, $from, $to, $extra) = @_;
4524         $from = 0 unless defined $from;
4525         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4526
4527         print "<table class=\"commit_search\">\n";
4528         my $alternate = 1;
4529         for (my $i = $from; $i <= $to; $i++) {
4530                 my %co = %{$commitlist->[$i]};
4531                 if (!%co) {
4532                         next;
4533                 }
4534                 my $commit = $co{'id'};
4535                 if ($alternate) {
4536                         print "<tr class=\"dark\">\n";
4537                 } else {
4538                         print "<tr class=\"light\">\n";
4539                 }
4540                 $alternate ^= 1;
4541                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4542                       format_author_html('td', \%co, 15, 5) .
4543                       "<td>" .
4544                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4545                                -class => "list subject"},
4546                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4547                 my $comment = $co{'comment'};
4548                 foreach my $line (@$comment) {
4549                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4550                                 my ($lead, $match, $trail) = ($1, $2, $3);
4551                                 $match = chop_str($match, 70, 5, 'center');
4552                                 my $contextlen = int((80 - length($match))/2);
4553                                 $contextlen = 30 if ($contextlen > 30);
4554                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4555                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4556
4557                                 $lead  = esc_html($lead);
4558                                 $match = esc_html($match);
4559                                 $trail = esc_html($trail);
4560
4561                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4562                         }
4563                 }
4564                 print "</td>\n" .
4565                       "<td class=\"link\">" .
4566                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4567                       " | " .
4568                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4569                       " | " .
4570                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4571                 print "</td>\n" .
4572                       "</tr>\n";
4573         }
4574         if (defined $extra) {
4575                 print "<tr>\n" .
4576                       "<td colspan=\"3\">$extra</td>\n" .
4577                       "</tr>\n";
4578         }
4579         print "</table>\n";
4580 }
4581
4582 ## ======================================================================
4583 ## ======================================================================
4584 ## actions
4585
4586 sub git_project_list {
4587         my $order = $input_params{'order'};
4588         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4589                 die_error(400, "Unknown order parameter");
4590         }
4591
4592         my @list = git_get_projects_list();
4593         if (!@list) {
4594                 die_error(404, "No projects found");
4595         }
4596
4597         git_header_html();
4598         if (-f $home_text) {
4599                 print "<div class=\"index_include\">\n";
4600                 insert_file($home_text);
4601                 print "</div>\n";
4602         }
4603         print $cgi->startform(-method => "get") .
4604               "<p class=\"projsearch\">Search:\n" .
4605               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4606               "</p>" .
4607               $cgi->end_form() . "\n";
4608         git_project_list_body(\@list, $order);
4609         git_footer_html();
4610 }
4611
4612 sub git_forks {
4613         my $order = $input_params{'order'};
4614         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4615                 die_error(400, "Unknown order parameter");
4616         }
4617
4618         my @list = git_get_projects_list($project);
4619         if (!@list) {
4620                 die_error(404, "No forks found");
4621         }
4622
4623         git_header_html();
4624         git_print_page_nav('','');
4625         git_print_header_div('summary', "$project forks");
4626         git_project_list_body(\@list, $order);
4627         git_footer_html();
4628 }
4629
4630 sub git_project_index {
4631         my @projects = git_get_projects_list($project);
4632
4633         print $cgi->header(
4634                 -type => 'text/plain',
4635                 -charset => 'utf-8',
4636                 -content_disposition => 'inline; filename="index.aux"');
4637
4638         foreach my $pr (@projects) {
4639                 if (!exists $pr->{'owner'}) {
4640                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4641                 }
4642
4643                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4644                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4645                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4646                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4647                 $path  =~ s/ /\+/g;
4648                 $owner =~ s/ /\+/g;
4649
4650                 print "$path $owner\n";
4651         }
4652 }
4653
4654 sub git_summary {
4655         my $descr = git_get_project_description($project) || "none";
4656         my %co = parse_commit("HEAD");
4657         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4658         my $head = $co{'id'};
4659
4660         my $owner = git_get_project_owner($project);
4661
4662         my $refs = git_get_references();
4663         # These get_*_list functions return one more to allow us to see if
4664         # there are more ...
4665         my @taglist  = git_get_tags_list(16);
4666         my @headlist = git_get_heads_list(16);
4667         my @forklist;
4668         my $check_forks = gitweb_check_feature('forks');
4669
4670         if ($check_forks) {
4671                 @forklist = git_get_projects_list($project);
4672         }
4673
4674         git_header_html();
4675         git_print_page_nav('summary','', $head);
4676
4677         print "<div class=\"title\">&nbsp;</div>\n";
4678         print "<table class=\"projects_list\">\n" .
4679               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4680               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4681         if (defined $cd{'rfc2822'}) {
4682                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4683         }
4684
4685         # use per project git URL list in $projectroot/$project/cloneurl
4686         # or make project git URL from git base URL and project name
4687         my $url_tag = "URL";
4688         my @url_list = git_get_project_url_list($project);
4689         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4690         foreach my $git_url (@url_list) {
4691                 next unless $git_url;
4692                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4693                 $url_tag = "";
4694         }
4695
4696         # Tag cloud
4697         my $show_ctags = gitweb_check_feature('ctags');
4698         if ($show_ctags) {
4699                 my $ctags = git_get_project_ctags($project);
4700                 my $cloud = git_populate_project_tagcloud($ctags);
4701                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4702                 print "</td>\n<td>" unless %$ctags;
4703                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4704                 print "</td>\n<td>" if %$ctags;
4705                 print git_show_project_tagcloud($cloud, 48);
4706                 print "</td></tr>";
4707         }
4708
4709         print "</table>\n";
4710
4711         # If XSS prevention is on, we don't include README.html.
4712         # TODO: Allow a readme in some safe format.
4713         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4714                 print "<div class=\"title\">readme</div>\n" .
4715                       "<div class=\"readme\">\n";
4716                 insert_file("$projectroot/$project/README.html");
4717                 print "\n</div>\n"; # class="readme"
4718         }
4719
4720         # we need to request one more than 16 (0..15) to check if
4721         # those 16 are all
4722         my @commitlist = $head ? parse_commits($head, 17) : ();
4723         if (@commitlist) {
4724                 git_print_header_div('shortlog');
4725                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4726                                   $#commitlist <=  15 ? undef :
4727                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4728         }
4729
4730         if (@taglist) {
4731                 git_print_header_div('tags');
4732                 git_tags_body(\@taglist, 0, 15,
4733                               $#taglist <=  15 ? undef :
4734                               $cgi->a({-href => href(action=>"tags")}, "..."));
4735         }
4736
4737         if (@headlist) {
4738                 git_print_header_div('heads');
4739                 git_heads_body(\@headlist, $head, 0, 15,
4740                                $#headlist <= 15 ? undef :
4741                                $cgi->a({-href => href(action=>"heads")}, "..."));
4742         }
4743
4744         if (@forklist) {
4745                 git_print_header_div('forks');
4746                 git_project_list_body(\@forklist, 'age', 0, 15,
4747                                       $#forklist <= 15 ? undef :
4748                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4749                                       'no_header');
4750         }
4751
4752         git_footer_html();
4753 }
4754
4755 sub git_tag {
4756         my $head = git_get_head_hash($project);
4757         git_header_html();
4758         git_print_page_nav('','', $head,undef,$head);
4759         my %tag = parse_tag($hash);
4760
4761         if (! %tag) {
4762                 die_error(404, "Unknown tag object");
4763         }
4764
4765         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4766         print "<div class=\"title_text\">\n" .
4767               "<table class=\"object_header\">\n" .
4768               "<tr>\n" .
4769               "<td>object</td>\n" .
4770               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4771                                $tag{'object'}) . "</td>\n" .
4772               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4773                                               $tag{'type'}) . "</td>\n" .
4774               "</tr>\n";
4775         if (defined($tag{'author'})) {
4776                 git_print_authorship_rows(\%tag, 'author');
4777         }
4778         print "</table>\n\n" .
4779               "</div>\n";
4780         print "<div class=\"page_body\">";
4781         my $comment = $tag{'comment'};
4782         foreach my $line (@$comment) {
4783                 chomp $line;
4784                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4785         }
4786         print "</div>\n";
4787         git_footer_html();
4788 }
4789
4790 sub git_blame {
4791         # permissions
4792         gitweb_check_feature('blame')
4793                 or die_error(403, "Blame view not allowed");
4794
4795         # error checking
4796         die_error(400, "No file name given") unless $file_name;
4797         $hash_base ||= git_get_head_hash($project);
4798         die_error(404, "Couldn't find base commit") unless $hash_base;
4799         my %co = parse_commit($hash_base)
4800                 or die_error(404, "Commit not found");
4801         my $ftype = "blob";
4802         if (!defined $hash) {
4803                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4804                         or die_error(404, "Error looking up file");
4805         } else {
4806                 $ftype = git_get_type($hash);
4807                 if ($ftype !~ "blob") {
4808                         die_error(400, "Object is not a blob");
4809                 }
4810         }
4811
4812         # run git-blame --porcelain
4813         open my $fd, "-|", git_cmd(), "blame", '-p',
4814                 $hash_base, '--', $file_name
4815                 or die_error(500, "Open git-blame failed");
4816
4817         # page header
4818         git_header_html();
4819         my $formats_nav =
4820                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4821                         "blob") .
4822                 " | " .
4823                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4824                         "history") .
4825                 " | " .
4826                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4827                         "HEAD");
4828         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4829         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4830         git_print_page_path($file_name, $ftype, $hash_base);
4831
4832         # page body
4833         my @rev_color = qw(light dark);
4834         my $num_colors = scalar(@rev_color);
4835         my $current_color = 0;
4836         my %metainfo = ();
4837
4838         print <<HTML;
4839 <div class="page_body">
4840 <table class="blame">
4841 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4842 HTML
4843  LINE:
4844         while (my $line = <$fd>) {
4845                 chomp $line;
4846                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4847                 # no <lines in group> for subsequent lines in group of lines
4848                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4849                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4850                 if (!exists $metainfo{$full_rev}) {
4851                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4852                 }
4853                 my $meta = $metainfo{$full_rev};
4854                 my $data;
4855                 while ($data = <$fd>) {
4856                         chomp $data;
4857                         last if ($data =~ s/^\t//); # contents of line
4858                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4859                                 $meta->{$1} = $2 unless exists $meta->{$1};
4860                         }
4861                         if ($data =~ /^previous /) {
4862                                 $meta->{'nprevious'}++;
4863                         }
4864                 }
4865                 my $short_rev = substr($full_rev, 0, 8);
4866                 my $author = $meta->{'author'};
4867                 my %date =
4868                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4869                 my $date = $date{'iso-tz'};
4870                 if ($group_size) {
4871                         $current_color = ($current_color + 1) % $num_colors;
4872                 }
4873                 my $tr_class = $rev_color[$current_color];
4874                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4875                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4876                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4877                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4878                 if ($group_size) {
4879                         print "<td class=\"sha1\"";
4880                         print " title=\"". esc_html($author) . ", $date\"";
4881                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4882                         print ">";
4883                         print $cgi->a({-href => href(action=>"commit",
4884                                                      hash=>$full_rev,
4885                                                      file_name=>$file_name)},
4886                                       esc_html($short_rev));
4887                         if ($group_size >= 2) {
4888                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4889                                 if (@author_initials) {
4890                                         print "<br />" .
4891                                               esc_html(join('', @author_initials));
4892                                         #           or join('.', ...)
4893                                 }
4894                         }
4895                         print "</td>\n";
4896                 }
4897                 # 'previous' <sha1 of parent commit> <filename at commit>
4898                 if (exists $meta->{'previous'} &&
4899                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4900                         $meta->{'parent'} = $1;
4901                         $meta->{'file_parent'} = unquote($2);
4902                 }
4903                 my $linenr_commit =
4904                         exists($meta->{'parent'}) ?
4905                         $meta->{'parent'} : $full_rev;
4906                 my $linenr_filename =
4907                         exists($meta->{'file_parent'}) ?
4908                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4909                 my $blamed = href(action => 'blame',
4910                                   file_name => $linenr_filename,
4911                                   hash_base => $linenr_commit);
4912                 print "<td class=\"linenr\">";
4913                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4914                                 -class => "linenr" },
4915                               esc_html($lineno));
4916                 print "</td>";
4917                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4918                 print "</tr>\n";
4919         }
4920         print "</table>\n";
4921         print "</div>";
4922         close $fd
4923                 or print "Reading blob failed\n";
4924
4925         # page footer
4926         git_footer_html();
4927 }
4928
4929 sub git_tags {
4930         my $head = git_get_head_hash($project);
4931         git_header_html();
4932         git_print_page_nav('','', $head,undef,$head);
4933         git_print_header_div('summary', $project);
4934
4935         my @tagslist = git_get_tags_list();
4936         if (@tagslist) {
4937                 git_tags_body(\@tagslist);
4938         }
4939         git_footer_html();
4940 }
4941
4942 sub git_heads {
4943         my $head = git_get_head_hash($project);
4944         git_header_html();
4945         git_print_page_nav('','', $head,undef,$head);
4946         git_print_header_div('summary', $project);
4947
4948         my @headslist = git_get_heads_list();
4949         if (@headslist) {
4950                 git_heads_body(\@headslist, $head);
4951         }
4952         git_footer_html();
4953 }
4954
4955 sub git_blob_plain {
4956         my $type = shift;
4957         my $expires;
4958
4959         if (!defined $hash) {
4960                 if (defined $file_name) {
4961                         my $base = $hash_base || git_get_head_hash($project);
4962                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4963                                 or die_error(404, "Cannot find file");
4964                 } else {
4965                         die_error(400, "No file name defined");
4966                 }
4967         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4968                 # blobs defined by non-textual hash id's can be cached
4969                 $expires = "+1d";
4970         }
4971
4972         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4973                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4974
4975         # content-type (can include charset)
4976         $type = blob_contenttype($fd, $file_name, $type);
4977
4978         # "save as" filename, even when no $file_name is given
4979         my $save_as = "$hash";
4980         if (defined $file_name) {
4981                 $save_as = $file_name;
4982         } elsif ($type =~ m/^text\//) {
4983                 $save_as .= '.txt';
4984         }
4985
4986         # With XSS prevention on, blobs of all types except a few known safe
4987         # ones are served with "Content-Disposition: attachment" to make sure
4988         # they don't run in our security domain.  For certain image types,
4989         # blob view writes an <img> tag referring to blob_plain view, and we
4990         # want to be sure not to break that by serving the image as an
4991         # attachment (though Firefox 3 doesn't seem to care).
4992         my $sandbox = $prevent_xss &&
4993                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4994
4995         print $cgi->header(
4996                 -type => $type,
4997                 -expires => $expires,
4998                 -content_disposition =>
4999                         ($sandbox ? 'attachment' : 'inline')
5000                         . '; filename="' . $save_as . '"');
5001         local $/ = undef;
5002         binmode STDOUT, ':raw';
5003         print <$fd>;
5004         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5005         close $fd;
5006 }
5007
5008 sub git_blob {
5009         my $expires;
5010
5011         if (!defined $hash) {
5012                 if (defined $file_name) {
5013                         my $base = $hash_base || git_get_head_hash($project);
5014                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5015                                 or die_error(404, "Cannot find file");
5016                 } else {
5017                         die_error(400, "No file name defined");
5018                 }
5019         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5020                 # blobs defined by non-textual hash id's can be cached
5021                 $expires = "+1d";
5022         }
5023
5024         my $have_blame = gitweb_check_feature('blame');
5025         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5026                 or die_error(500, "Couldn't cat $file_name, $hash");
5027         my $mimetype = blob_mimetype($fd, $file_name);
5028         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5029                 close $fd;
5030                 return git_blob_plain($mimetype);
5031         }
5032         # we can have blame only for text/* mimetype
5033         $have_blame &&= ($mimetype =~ m!^text/!);
5034
5035         git_header_html(undef, $expires);
5036         my $formats_nav = '';
5037         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5038                 if (defined $file_name) {
5039                         if ($have_blame) {
5040                                 $formats_nav .=
5041                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5042                                                 "blame") .
5043                                         " | ";
5044                         }
5045                         $formats_nav .=
5046                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5047                                         "history") .
5048                                 " | " .
5049                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5050                                         "raw") .
5051                                 " | " .
5052                                 $cgi->a({-href => href(action=>"blob",
5053                                                        hash_base=>"HEAD", file_name=>$file_name)},
5054                                         "HEAD");
5055                 } else {
5056                         $formats_nav .=
5057                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5058                                         "raw");
5059                 }
5060                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5061                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5062         } else {
5063                 print "<div class=\"page_nav\">\n" .
5064                       "<br/><br/></div>\n" .
5065                       "<div class=\"title\">$hash</div>\n";
5066         }
5067         git_print_page_path($file_name, "blob", $hash_base);
5068         print "<div class=\"page_body\">\n";
5069         if ($mimetype =~ m!^image/!) {
5070                 print qq!<img type="$mimetype"!;
5071                 if ($file_name) {
5072                         print qq! alt="$file_name" title="$file_name"!;
5073                 }
5074                 print qq! src="! .
5075                       href(action=>"blob_plain", hash=>$hash,
5076                            hash_base=>$hash_base, file_name=>$file_name) .
5077                       qq!" />\n!;
5078         } else {
5079                 my $nr;
5080                 while (my $line = <$fd>) {
5081                         chomp $line;
5082                         $nr++;
5083                         $line = untabify($line);
5084                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5085                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5086                 }
5087         }
5088         close $fd
5089                 or print "Reading blob failed.\n";
5090         print "</div>";
5091         git_footer_html();
5092 }
5093
5094 sub git_tree {
5095         if (!defined $hash_base) {
5096                 $hash_base = "HEAD";
5097         }
5098         if (!defined $hash) {
5099                 if (defined $file_name) {
5100                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5101                 } else {
5102                         $hash = $hash_base;
5103                 }
5104         }
5105         die_error(404, "No such tree") unless defined($hash);
5106
5107         my @entries = ();
5108         {
5109                 local $/ = "\0";
5110                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5111                         or die_error(500, "Open git-ls-tree failed");
5112                 @entries = map { chomp; $_ } <$fd>;
5113                 close $fd
5114                         or die_error(404, "Reading tree failed");
5115         }
5116
5117         my $refs = git_get_references();
5118         my $ref = format_ref_marker($refs, $hash_base);
5119         git_header_html();
5120         my $basedir = '';
5121         my $have_blame = gitweb_check_feature('blame');
5122         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5123                 my @views_nav = ();
5124                 if (defined $file_name) {
5125                         push @views_nav,
5126                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5127                                         "history"),
5128                                 $cgi->a({-href => href(action=>"tree",
5129                                                        hash_base=>"HEAD", file_name=>$file_name)},
5130                                         "HEAD"),
5131                 }
5132                 my $snapshot_links = format_snapshot_links($hash);
5133                 if (defined $snapshot_links) {
5134                         # FIXME: Should be available when we have no hash base as well.
5135                         push @views_nav, $snapshot_links;
5136                 }
5137                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5138                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5139         } else {
5140                 undef $hash_base;
5141                 print "<div class=\"page_nav\">\n";
5142                 print "<br/><br/></div>\n";
5143                 print "<div class=\"title\">$hash</div>\n";
5144         }
5145         if (defined $file_name) {
5146                 $basedir = $file_name;
5147                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5148                         $basedir .= '/';
5149                 }
5150                 git_print_page_path($file_name, 'tree', $hash_base);
5151         }
5152         print "<div class=\"page_body\">\n";
5153         print "<table class=\"tree\">\n";
5154         my $alternate = 1;
5155         # '..' (top directory) link if possible
5156         if (defined $hash_base &&
5157             defined $file_name && $file_name =~ m![^/]+$!) {
5158                 if ($alternate) {
5159                         print "<tr class=\"dark\">\n";
5160                 } else {
5161                         print "<tr class=\"light\">\n";
5162                 }
5163                 $alternate ^= 1;
5164
5165                 my $up = $file_name;
5166                 $up =~ s!/?[^/]+$!!;
5167                 undef $up unless $up;
5168                 # based on git_print_tree_entry
5169                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5170                 print '<td class="list">';
5171                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5172                                              file_name=>$up)},
5173                               "..");
5174                 print "</td>\n";
5175                 print "<td class=\"link\"></td>\n";
5176
5177                 print "</tr>\n";
5178         }
5179         foreach my $line (@entries) {
5180                 my %t = parse_ls_tree_line($line, -z => 1);
5181
5182                 if ($alternate) {
5183                         print "<tr class=\"dark\">\n";
5184                 } else {
5185                         print "<tr class=\"light\">\n";
5186                 }
5187                 $alternate ^= 1;
5188
5189                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5190
5191                 print "</tr>\n";
5192         }
5193         print "</table>\n" .
5194               "</div>";
5195         git_footer_html();
5196 }
5197
5198 sub git_snapshot {
5199         my $format = $input_params{'snapshot_format'};
5200         if (!@snapshot_fmts) {
5201                 die_error(403, "Snapshots not allowed");
5202         }
5203         # default to first supported snapshot format
5204         $format ||= $snapshot_fmts[0];
5205         if ($format !~ m/^[a-z0-9]+$/) {
5206                 die_error(400, "Invalid snapshot format parameter");
5207         } elsif (!exists($known_snapshot_formats{$format})) {
5208                 die_error(400, "Unknown snapshot format");
5209         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5210                 die_error(403, "Unsupported snapshot format");
5211         }
5212
5213         if (!defined $hash) {
5214                 $hash = git_get_head_hash($project);
5215         }
5216
5217         my $name = $project;
5218         $name =~ s,([^/])/*\.git$,$1,;
5219         $name = basename($name);
5220         my $filename = to_utf8($name);
5221         $name =~ s/\047/\047\\\047\047/g;
5222         my $cmd;
5223         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5224         $cmd = quote_command(
5225                 git_cmd(), 'archive',
5226                 "--format=$known_snapshot_formats{$format}{'format'}",
5227                 "--prefix=$name/", $hash);
5228         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5229                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5230         }
5231
5232         print $cgi->header(
5233                 -type => $known_snapshot_formats{$format}{'type'},
5234                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5235                 -status => '200 OK');
5236
5237         open my $fd, "-|", $cmd
5238                 or die_error(500, "Execute git-archive failed");
5239         binmode STDOUT, ':raw';
5240         print <$fd>;
5241         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5242         close $fd;
5243 }
5244
5245 sub git_log {
5246         my $head = git_get_head_hash($project);
5247         if (!defined $hash) {
5248                 $hash = $head;
5249         }
5250         if (!defined $page) {
5251                 $page = 0;
5252         }
5253         my $refs = git_get_references();
5254
5255         my @commitlist = parse_commits($hash, 101, (100 * $page));
5256
5257         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5258
5259         my ($patch_max) = gitweb_get_feature('patches');
5260         if ($patch_max) {
5261                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5262                         $paging_nav .= " &sdot; " .
5263                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5264                                         "patches");
5265                 }
5266         }
5267
5268         git_header_html();
5269         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5270
5271         if (!@commitlist) {
5272                 my %co = parse_commit($hash);
5273
5274                 git_print_header_div('summary', $project);
5275                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5276         }
5277         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5278         for (my $i = 0; $i <= $to; $i++) {
5279                 my %co = %{$commitlist[$i]};
5280                 next if !%co;
5281                 my $commit = $co{'id'};
5282                 my $ref = format_ref_marker($refs, $commit);
5283                 my %ad = parse_date($co{'author_epoch'});
5284                 git_print_header_div('commit',
5285                                "<span class=\"age\">$co{'age_string'}</span>" .
5286                                esc_html($co{'title'}) . $ref,
5287                                $commit);
5288                 print "<div class=\"title_text\">\n" .
5289                       "<div class=\"log_link\">\n" .
5290                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5291                       " | " .
5292                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5293                       " | " .
5294                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5295                       "<br/>\n" .
5296                       "</div>\n";
5297                       git_print_authorship(\%co, -tag => 'span');
5298                       print "<br/>\n</div>\n";
5299
5300                 print "<div class=\"log_body\">\n";
5301                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5302                 print "</div>\n";
5303         }
5304         if ($#commitlist >= 100) {
5305                 print "<div class=\"page_nav\">\n";
5306                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5307                                -accesskey => "n", -title => "Alt-n"}, "next");
5308                 print "</div>\n";
5309         }
5310         git_footer_html();
5311 }
5312
5313 sub git_commit {
5314         $hash ||= $hash_base || "HEAD";
5315         my %co = parse_commit($hash)
5316             or die_error(404, "Unknown commit object");
5317
5318         my $parent  = $co{'parent'};
5319         my $parents = $co{'parents'}; # listref
5320
5321         # we need to prepare $formats_nav before any parameter munging
5322         my $formats_nav;
5323         if (!defined $parent) {
5324                 # --root commitdiff
5325                 $formats_nav .= '(initial)';
5326         } elsif (@$parents == 1) {
5327                 # single parent commit
5328                 $formats_nav .=
5329                         '(parent: ' .
5330                         $cgi->a({-href => href(action=>"commit",
5331                                                hash=>$parent)},
5332                                 esc_html(substr($parent, 0, 7))) .
5333                         ')';
5334         } else {
5335                 # merge commit
5336                 $formats_nav .=
5337                         '(merge: ' .
5338                         join(' ', map {
5339                                 $cgi->a({-href => href(action=>"commit",
5340                                                        hash=>$_)},
5341                                         esc_html(substr($_, 0, 7)));
5342                         } @$parents ) .
5343                         ')';
5344         }
5345         if (gitweb_check_feature('patches')) {
5346                 $formats_nav .= " | " .
5347                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5348                                 "patch");
5349         }
5350
5351         if (!defined $parent) {
5352                 $parent = "--root";
5353         }
5354         my @difftree;
5355         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5356                 @diff_opts,
5357                 (@$parents <= 1 ? $parent : '-c'),
5358                 $hash, "--"
5359                 or die_error(500, "Open git-diff-tree failed");
5360         @difftree = map { chomp; $_ } <$fd>;
5361         close $fd or die_error(404, "Reading git-diff-tree failed");
5362
5363         # non-textual hash id's can be cached
5364         my $expires;
5365         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5366                 $expires = "+1d";
5367         }
5368         my $refs = git_get_references();
5369         my $ref = format_ref_marker($refs, $co{'id'});
5370
5371         git_header_html(undef, $expires);
5372         git_print_page_nav('commit', '',
5373                            $hash, $co{'tree'}, $hash,
5374                            $formats_nav);
5375
5376         if (defined $co{'parent'}) {
5377                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5378         } else {
5379                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5380         }
5381         print "<div class=\"title_text\">\n" .
5382               "<table class=\"object_header\">\n";
5383         git_print_authorship_rows(\%co);
5384         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5385         print "<tr>" .
5386               "<td>tree</td>" .
5387               "<td class=\"sha1\">" .
5388               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5389                        class => "list"}, $co{'tree'}) .
5390               "</td>" .
5391               "<td class=\"link\">" .
5392               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5393                       "tree");
5394         my $snapshot_links = format_snapshot_links($hash);
5395         if (defined $snapshot_links) {
5396                 print " | " . $snapshot_links;
5397         }
5398         print "</td>" .
5399               "</tr>\n";
5400
5401         foreach my $par (@$parents) {
5402                 print "<tr>" .
5403                       "<td>parent</td>" .
5404                       "<td class=\"sha1\">" .
5405                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5406                                class => "list"}, $par) .
5407                       "</td>" .
5408                       "<td class=\"link\">" .
5409                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5410                       " | " .
5411                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5412                       "</td>" .
5413                       "</tr>\n";
5414         }
5415         print "</table>".
5416               "</div>\n";
5417
5418         print "<div class=\"page_body\">\n";
5419         git_print_log($co{'comment'});
5420         print "</div>\n";
5421
5422         git_difftree_body(\@difftree, $hash, @$parents);
5423
5424         git_footer_html();
5425 }
5426
5427 sub git_object {
5428         # object is defined by:
5429         # - hash or hash_base alone
5430         # - hash_base and file_name
5431         my $type;
5432
5433         # - hash or hash_base alone
5434         if ($hash || ($hash_base && !defined $file_name)) {
5435                 my $object_id = $hash || $hash_base;
5436
5437                 open my $fd, "-|", quote_command(
5438                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5439                         or die_error(404, "Object does not exist");
5440                 $type = <$fd>;
5441                 chomp $type;
5442                 close $fd
5443                         or die_error(404, "Object does not exist");
5444
5445         # - hash_base and file_name
5446         } elsif ($hash_base && defined $file_name) {
5447                 $file_name =~ s,/+$,,;
5448
5449                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5450                         or die_error(404, "Base object does not exist");
5451
5452                 # here errors should not hapen
5453                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5454                         or die_error(500, "Open git-ls-tree failed");
5455                 my $line = <$fd>;
5456                 close $fd;
5457
5458                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5459                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5460                         die_error(404, "File or directory for given base does not exist");
5461                 }
5462                 $type = $2;
5463                 $hash = $3;
5464         } else {
5465                 die_error(400, "Not enough information to find object");
5466         }
5467
5468         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5469                                           hash=>$hash, hash_base=>$hash_base,
5470                                           file_name=>$file_name),
5471                              -status => '302 Found');
5472 }
5473
5474 sub git_blobdiff {
5475         my $format = shift || 'html';
5476
5477         my $fd;
5478         my @difftree;
5479         my %diffinfo;
5480         my $expires;
5481
5482         # preparing $fd and %diffinfo for git_patchset_body
5483         # new style URI
5484         if (defined $hash_base && defined $hash_parent_base) {
5485                 if (defined $file_name) {
5486                         # read raw output
5487                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5488                                 $hash_parent_base, $hash_base,
5489                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5490                                 or die_error(500, "Open git-diff-tree failed");
5491                         @difftree = map { chomp; $_ } <$fd>;
5492                         close $fd
5493                                 or die_error(404, "Reading git-diff-tree failed");
5494                         @difftree
5495                                 or die_error(404, "Blob diff not found");
5496
5497                 } elsif (defined $hash &&
5498                          $hash =~ /[0-9a-fA-F]{40}/) {
5499                         # try to find filename from $hash
5500
5501                         # read filtered raw output
5502                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5503                                 $hash_parent_base, $hash_base, "--"
5504                                 or die_error(500, "Open git-diff-tree failed");
5505                         @difftree =
5506                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5507                                 # $hash == to_id
5508                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5509                                 map { chomp; $_ } <$fd>;
5510                         close $fd
5511                                 or die_error(404, "Reading git-diff-tree failed");
5512                         @difftree
5513                                 or die_error(404, "Blob diff not found");
5514
5515                 } else {
5516                         die_error(400, "Missing one of the blob diff parameters");
5517                 }
5518
5519                 if (@difftree > 1) {
5520                         die_error(400, "Ambiguous blob diff specification");
5521                 }
5522
5523                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5524                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5525                 $file_name   ||= $diffinfo{'to_file'};
5526
5527                 $hash_parent ||= $diffinfo{'from_id'};
5528                 $hash        ||= $diffinfo{'to_id'};
5529
5530                 # non-textual hash id's can be cached
5531                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5532                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5533                         $expires = '+1d';
5534                 }
5535
5536                 # open patch output
5537                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5538                         '-p', ($format eq 'html' ? "--full-index" : ()),
5539                         $hash_parent_base, $hash_base,
5540                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5541                         or die_error(500, "Open git-diff-tree failed");
5542         }
5543
5544         # old/legacy style URI -- not generated anymore since 1.4.3.
5545         if (!%diffinfo) {
5546                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5547         }
5548
5549         # header
5550         if ($format eq 'html') {
5551                 my $formats_nav =
5552                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5553                                 "raw");
5554                 git_header_html(undef, $expires);
5555                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5556                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5557                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5558                 } else {
5559                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5560                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5561                 }
5562                 if (defined $file_name) {
5563                         git_print_page_path($file_name, "blob", $hash_base);
5564                 } else {
5565                         print "<div class=\"page_path\"></div>\n";
5566                 }
5567
5568         } elsif ($format eq 'plain') {
5569                 print $cgi->header(
5570                         -type => 'text/plain',
5571                         -charset => 'utf-8',
5572                         -expires => $expires,
5573                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5574
5575                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5576
5577         } else {
5578                 die_error(400, "Unknown blobdiff format");
5579         }
5580
5581         # patch
5582         if ($format eq 'html') {
5583                 print "<div class=\"page_body\">\n";
5584
5585                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5586                 close $fd;
5587
5588                 print "</div>\n"; # class="page_body"
5589                 git_footer_html();
5590
5591         } else {
5592                 while (my $line = <$fd>) {
5593                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5594                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5595
5596                         print $line;
5597
5598                         last if $line =~ m!^\+\+\+!;
5599                 }
5600                 local $/ = undef;
5601                 print <$fd>;
5602                 close $fd;
5603         }
5604 }
5605
5606 sub git_blobdiff_plain {
5607         git_blobdiff('plain');
5608 }
5609
5610 sub git_commitdiff {
5611         my %params = @_;
5612         my $format = $params{-format} || 'html';
5613
5614         my ($patch_max) = gitweb_get_feature('patches');
5615         if ($format eq 'patch') {
5616                 die_error(403, "Patch view not allowed") unless $patch_max;
5617         }
5618
5619         $hash ||= $hash_base || "HEAD";
5620         my %co = parse_commit($hash)
5621             or die_error(404, "Unknown commit object");
5622
5623         # choose format for commitdiff for merge
5624         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5625                 $hash_parent = '--cc';
5626         }
5627         # we need to prepare $formats_nav before almost any parameter munging
5628         my $formats_nav;
5629         if ($format eq 'html') {
5630                 $formats_nav =
5631                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5632                                 "raw");
5633                 if ($patch_max) {
5634                         $formats_nav .= " | " .
5635                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5636                                         "patch");
5637                 }
5638
5639                 if (defined $hash_parent &&
5640                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5641                         # commitdiff with two commits given
5642                         my $hash_parent_short = $hash_parent;
5643                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5644                                 $hash_parent_short = substr($hash_parent, 0, 7);
5645                         }
5646                         $formats_nav .=
5647                                 ' (from';
5648                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5649                                 if ($co{'parents'}[$i] eq $hash_parent) {
5650                                         $formats_nav .= ' parent ' . ($i+1);
5651                                         last;
5652                                 }
5653                         }
5654                         $formats_nav .= ': ' .
5655                                 $cgi->a({-href => href(action=>"commitdiff",
5656                                                        hash=>$hash_parent)},
5657                                         esc_html($hash_parent_short)) .
5658                                 ')';
5659                 } elsif (!$co{'parent'}) {
5660                         # --root commitdiff
5661                         $formats_nav .= ' (initial)';
5662                 } elsif (scalar @{$co{'parents'}} == 1) {
5663                         # single parent commit
5664                         $formats_nav .=
5665                                 ' (parent: ' .
5666                                 $cgi->a({-href => href(action=>"commitdiff",
5667                                                        hash=>$co{'parent'})},
5668                                         esc_html(substr($co{'parent'}, 0, 7))) .
5669                                 ')';
5670                 } else {
5671                         # merge commit
5672                         if ($hash_parent eq '--cc') {
5673                                 $formats_nav .= ' | ' .
5674                                         $cgi->a({-href => href(action=>"commitdiff",
5675                                                                hash=>$hash, hash_parent=>'-c')},
5676                                                 'combined');
5677                         } else { # $hash_parent eq '-c'
5678                                 $formats_nav .= ' | ' .
5679                                         $cgi->a({-href => href(action=>"commitdiff",
5680                                                                hash=>$hash, hash_parent=>'--cc')},
5681                                                 'compact');
5682                         }
5683                         $formats_nav .=
5684                                 ' (merge: ' .
5685                                 join(' ', map {
5686                                         $cgi->a({-href => href(action=>"commitdiff",
5687                                                                hash=>$_)},
5688                                                 esc_html(substr($_, 0, 7)));
5689                                 } @{$co{'parents'}} ) .
5690                                 ')';
5691                 }
5692         }
5693
5694         my $hash_parent_param = $hash_parent;
5695         if (!defined $hash_parent_param) {
5696                 # --cc for multiple parents, --root for parentless
5697                 $hash_parent_param =
5698                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5699         }
5700
5701         # read commitdiff
5702         my $fd;
5703         my @difftree;
5704         if ($format eq 'html') {
5705                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5706                         "--no-commit-id", "--patch-with-raw", "--full-index",
5707                         $hash_parent_param, $hash, "--"
5708                         or die_error(500, "Open git-diff-tree failed");
5709
5710                 while (my $line = <$fd>) {
5711                         chomp $line;
5712                         # empty line ends raw part of diff-tree output
5713                         last unless $line;
5714                         push @difftree, scalar parse_difftree_raw_line($line);
5715                 }
5716
5717         } elsif ($format eq 'plain') {
5718                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5719                         '-p', $hash_parent_param, $hash, "--"
5720                         or die_error(500, "Open git-diff-tree failed");
5721         } elsif ($format eq 'patch') {
5722                 # For commit ranges, we limit the output to the number of
5723                 # patches specified in the 'patches' feature.
5724                 # For single commits, we limit the output to a single patch,
5725                 # diverging from the git-format-patch default.
5726                 my @commit_spec = ();
5727                 if ($hash_parent) {
5728                         if ($patch_max > 0) {
5729                                 push @commit_spec, "-$patch_max";
5730                         }
5731                         push @commit_spec, '-n', "$hash_parent..$hash";
5732                 } else {
5733                         if ($params{-single}) {
5734                                 push @commit_spec, '-1';
5735                         } else {
5736                                 if ($patch_max > 0) {
5737                                         push @commit_spec, "-$patch_max";
5738                                 }
5739                                 push @commit_spec, "-n";
5740                         }
5741                         push @commit_spec, '--root', $hash;
5742                 }
5743                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5744                         '--stdout', @commit_spec
5745                         or die_error(500, "Open git-format-patch failed");
5746         } else {
5747                 die_error(400, "Unknown commitdiff format");
5748         }
5749
5750         # non-textual hash id's can be cached
5751         my $expires;
5752         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5753                 $expires = "+1d";
5754         }
5755
5756         # write commit message
5757         if ($format eq 'html') {
5758                 my $refs = git_get_references();
5759                 my $ref = format_ref_marker($refs, $co{'id'});
5760
5761                 git_header_html(undef, $expires);
5762                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5763                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5764                 print "<div class=\"title_text\">\n" .
5765                       "<table class=\"object_header\">\n";
5766                 git_print_authorship_rows(\%co);
5767                 print "</table>".
5768                       "</div>\n";
5769                 print "<div class=\"page_body\">\n";
5770                 if (@{$co{'comment'}} > 1) {
5771                         print "<div class=\"log\">\n";
5772                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5773                         print "</div>\n"; # class="log"
5774                 }
5775
5776         } elsif ($format eq 'plain') {
5777                 my $refs = git_get_references("tags");
5778                 my $tagname = git_get_rev_name_tags($hash);
5779                 my $filename = basename($project) . "-$hash.patch";
5780
5781                 print $cgi->header(
5782                         -type => 'text/plain',
5783                         -charset => 'utf-8',
5784                         -expires => $expires,
5785                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5786                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5787                 print "From: " . to_utf8($co{'author'}) . "\n";
5788                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5789                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5790
5791                 print "X-Git-Tag: $tagname\n" if $tagname;
5792                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5793
5794                 foreach my $line (@{$co{'comment'}}) {
5795                         print to_utf8($line) . "\n";
5796                 }
5797                 print "---\n\n";
5798         } elsif ($format eq 'patch') {
5799                 my $filename = basename($project) . "-$hash.patch";
5800
5801                 print $cgi->header(
5802                         -type => 'text/plain',
5803                         -charset => 'utf-8',
5804                         -expires => $expires,
5805                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5806         }
5807
5808         # write patch
5809         if ($format eq 'html') {
5810                 my $use_parents = !defined $hash_parent ||
5811                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5812                 git_difftree_body(\@difftree, $hash,
5813                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5814                 print "<br/>\n";
5815
5816                 git_patchset_body($fd, \@difftree, $hash,
5817                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5818                 close $fd;
5819                 print "</div>\n"; # class="page_body"
5820                 git_footer_html();
5821
5822         } elsif ($format eq 'plain') {
5823                 local $/ = undef;
5824                 print <$fd>;
5825                 close $fd
5826                         or print "Reading git-diff-tree failed\n";
5827         } elsif ($format eq 'patch') {
5828                 local $/ = undef;
5829                 print <$fd>;
5830                 close $fd
5831                         or print "Reading git-format-patch failed\n";
5832         }
5833 }
5834
5835 sub git_commitdiff_plain {
5836         git_commitdiff(-format => 'plain');
5837 }
5838
5839 # format-patch-style patches
5840 sub git_patch {
5841         git_commitdiff(-format => 'patch', -single=> 1);
5842 }
5843
5844 sub git_patches {
5845         git_commitdiff(-format => 'patch');
5846 }
5847
5848 sub git_history {
5849         if (!defined $hash_base) {
5850                 $hash_base = git_get_head_hash($project);
5851         }
5852         if (!defined $page) {
5853                 $page = 0;
5854         }
5855         my $ftype;
5856         my %co = parse_commit($hash_base)
5857             or die_error(404, "Unknown commit object");
5858
5859         my $refs = git_get_references();
5860         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5861
5862         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5863                                        $file_name, "--full-history")
5864             or die_error(404, "No such file or directory on given branch");
5865
5866         if (!defined $hash && defined $file_name) {
5867                 # some commits could have deleted file in question,
5868                 # and not have it in tree, but one of them has to have it
5869                 for (my $i = 0; $i <= @commitlist; $i++) {
5870                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5871                         last if defined $hash;
5872                 }
5873         }
5874         if (defined $hash) {
5875                 $ftype = git_get_type($hash);
5876         }
5877         if (!defined $ftype) {
5878                 die_error(500, "Unknown type of object");
5879         }
5880
5881         my $paging_nav = '';
5882         if ($page > 0) {
5883                 $paging_nav .=
5884                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5885                                                file_name=>$file_name)},
5886                                 "first");
5887                 $paging_nav .= " &sdot; " .
5888                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5889                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5890         } else {
5891                 $paging_nav .= "first";
5892                 $paging_nav .= " &sdot; prev";
5893         }
5894         my $next_link = '';
5895         if ($#commitlist >= 100) {
5896                 $next_link =
5897                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5898                                  -accesskey => "n", -title => "Alt-n"}, "next");
5899                 $paging_nav .= " &sdot; $next_link";
5900         } else {
5901                 $paging_nav .= " &sdot; next";
5902         }
5903
5904         git_header_html();
5905         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5906         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5907         git_print_page_path($file_name, $ftype, $hash_base);
5908
5909         git_history_body(\@commitlist, 0, 99,
5910                          $refs, $hash_base, $ftype, $next_link);
5911
5912         git_footer_html();
5913 }
5914
5915 sub git_search {
5916         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5917         if (!defined $searchtext) {
5918                 die_error(400, "Text field is empty");
5919         }
5920         if (!defined $hash) {
5921                 $hash = git_get_head_hash($project);
5922         }
5923         my %co = parse_commit($hash);
5924         if (!%co) {
5925                 die_error(404, "Unknown commit object");
5926         }
5927         if (!defined $page) {
5928                 $page = 0;
5929         }
5930
5931         $searchtype ||= 'commit';
5932         if ($searchtype eq 'pickaxe') {
5933                 # pickaxe may take all resources of your box and run for several minutes
5934                 # with every query - so decide by yourself how public you make this feature
5935                 gitweb_check_feature('pickaxe')
5936                     or die_error(403, "Pickaxe is disabled");
5937         }
5938         if ($searchtype eq 'grep') {
5939                 gitweb_check_feature('grep')
5940                     or die_error(403, "Grep is disabled");
5941         }
5942
5943         git_header_html();
5944
5945         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5946                 my $greptype;
5947                 if ($searchtype eq 'commit') {
5948                         $greptype = "--grep=";
5949                 } elsif ($searchtype eq 'author') {
5950                         $greptype = "--author=";
5951                 } elsif ($searchtype eq 'committer') {
5952                         $greptype = "--committer=";
5953                 }
5954                 $greptype .= $searchtext;
5955                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5956                                                $greptype, '--regexp-ignore-case',
5957                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5958
5959                 my $paging_nav = '';
5960                 if ($page > 0) {
5961                         $paging_nav .=
5962                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5963                                                        searchtext=>$searchtext,
5964                                                        searchtype=>$searchtype)},
5965                                         "first");
5966                         $paging_nav .= " &sdot; " .
5967                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5968                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5969                 } else {
5970                         $paging_nav .= "first";
5971                         $paging_nav .= " &sdot; prev";
5972                 }
5973                 my $next_link = '';
5974                 if ($#commitlist >= 100) {
5975                         $next_link =
5976                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5977                                          -accesskey => "n", -title => "Alt-n"}, "next");
5978                         $paging_nav .= " &sdot; $next_link";
5979                 } else {
5980                         $paging_nav .= " &sdot; next";
5981                 }
5982
5983                 if ($#commitlist >= 100) {
5984                 }
5985
5986                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5987                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5988                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5989         }
5990
5991         if ($searchtype eq 'pickaxe') {
5992                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5993                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5994
5995                 print "<table class=\"pickaxe search\">\n";
5996                 my $alternate = 1;
5997                 local $/ = "\n";
5998                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5999                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6000                         ($search_use_regexp ? '--pickaxe-regex' : ());
6001                 undef %co;
6002                 my @files;
6003                 while (my $line = <$fd>) {
6004                         chomp $line;
6005                         next unless $line;
6006
6007                         my %set = parse_difftree_raw_line($line);
6008                         if (defined $set{'commit'}) {
6009                                 # finish previous commit
6010                                 if (%co) {
6011                                         print "</td>\n" .
6012                                               "<td class=\"link\">" .
6013                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6014                                               " | " .
6015                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6016                                         print "</td>\n" .
6017                                               "</tr>\n";
6018                                 }
6019
6020                                 if ($alternate) {
6021                                         print "<tr class=\"dark\">\n";
6022                                 } else {
6023                                         print "<tr class=\"light\">\n";
6024                                 }
6025                                 $alternate ^= 1;
6026                                 %co = parse_commit($set{'commit'});
6027                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6028                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6029                                       "<td><i>$author</i></td>\n" .
6030                                       "<td>" .
6031                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6032                                               -class => "list subject"},
6033                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6034                         } elsif (defined $set{'to_id'}) {
6035                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6036
6037                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6038                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6039                                               -class => "list"},
6040                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6041                                       "<br/>\n";
6042                         }
6043                 }
6044                 close $fd;
6045
6046                 # finish last commit (warning: repetition!)
6047                 if (%co) {
6048                         print "</td>\n" .
6049                               "<td class=\"link\">" .
6050                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6051                               " | " .
6052                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6053                         print "</td>\n" .
6054                               "</tr>\n";
6055                 }
6056
6057                 print "</table>\n";
6058         }
6059
6060         if ($searchtype eq 'grep') {
6061                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6062                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6063
6064                 print "<table class=\"grep_search\">\n";
6065                 my $alternate = 1;
6066                 my $matches = 0;
6067                 local $/ = "\n";
6068                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6069                         $search_use_regexp ? ('-E', '-i') : '-F',
6070                         $searchtext, $co{'tree'};
6071                 my $lastfile = '';
6072                 while (my $line = <$fd>) {
6073                         chomp $line;
6074                         my ($file, $lno, $ltext, $binary);
6075                         last if ($matches++ > 1000);
6076                         if ($line =~ /^Binary file (.+) matches$/) {
6077                                 $file = $1;
6078                                 $binary = 1;
6079                         } else {
6080                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6081                         }
6082                         if ($file ne $lastfile) {
6083                                 $lastfile and print "</td></tr>\n";
6084                                 if ($alternate++) {
6085                                         print "<tr class=\"dark\">\n";
6086                                 } else {
6087                                         print "<tr class=\"light\">\n";
6088                                 }
6089                                 print "<td class=\"list\">".
6090                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6091                                                                file_name=>"$file"),
6092                                                 -class => "list"}, esc_path($file));
6093                                 print "</td><td>\n";
6094                                 $lastfile = $file;
6095                         }
6096                         if ($binary) {
6097                                 print "<div class=\"binary\">Binary file</div>\n";
6098                         } else {
6099                                 $ltext = untabify($ltext);
6100                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6101                                         $ltext = esc_html($1, -nbsp=>1);
6102                                         $ltext .= '<span class="match">';
6103                                         $ltext .= esc_html($2, -nbsp=>1);
6104                                         $ltext .= '</span>';
6105                                         $ltext .= esc_html($3, -nbsp=>1);
6106                                 } else {
6107                                         $ltext = esc_html($ltext, -nbsp=>1);
6108                                 }
6109                                 print "<div class=\"pre\">" .
6110                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6111                                                                file_name=>"$file").'#l'.$lno,
6112                                                 -class => "linenr"}, sprintf('%4i', $lno))
6113                                         . ' ' .  $ltext . "</div>\n";
6114                         }
6115                 }
6116                 if ($lastfile) {
6117                         print "</td></tr>\n";
6118                         if ($matches > 1000) {
6119                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6120                         }
6121                 } else {
6122                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6123                 }
6124                 close $fd;
6125
6126                 print "</table>\n";
6127         }
6128         git_footer_html();
6129 }
6130
6131 sub git_search_help {
6132         git_header_html();
6133         git_print_page_nav('','', $hash,$hash,$hash);
6134         print <<EOT;
6135 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6136 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6137 the pattern entered is recognized as the POSIX extended
6138 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6139 insensitive).</p>
6140 <dl>
6141 <dt><b>commit</b></dt>
6142 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6143 EOT
6144         my $have_grep = gitweb_check_feature('grep');
6145         if ($have_grep) {
6146                 print <<EOT;
6147 <dt><b>grep</b></dt>
6148 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6149     a different one) are searched for the given pattern. On large trees, this search can take
6150 a while and put some strain on the server, so please use it with some consideration. Note that
6151 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6152 case-sensitive.</dd>
6153 EOT
6154         }
6155         print <<EOT;
6156 <dt><b>author</b></dt>
6157 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6158 <dt><b>committer</b></dt>
6159 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6160 EOT
6161         my $have_pickaxe = gitweb_check_feature('pickaxe');
6162         if ($have_pickaxe) {
6163                 print <<EOT;
6164 <dt><b>pickaxe</b></dt>
6165 <dd>All commits that caused the string to appear or disappear from any file (changes that
6166 added, removed or "modified" the string) will be listed. This search can take a while and
6167 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6168 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6169 EOT
6170         }
6171         print "</dl>\n";
6172         git_footer_html();
6173 }
6174
6175 sub git_shortlog {
6176         my $head = git_get_head_hash($project);
6177         if (!defined $hash) {
6178                 $hash = $head;
6179         }
6180         if (!defined $page) {
6181                 $page = 0;
6182         }
6183         my $refs = git_get_references();
6184
6185         my $commit_hash = $hash;
6186         if (defined $hash_parent) {
6187                 $commit_hash = "$hash_parent..$hash";
6188         }
6189         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6190
6191         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6192         my $next_link = '';
6193         if ($#commitlist >= 100) {
6194                 $next_link =
6195                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6196                                  -accesskey => "n", -title => "Alt-n"}, "next");
6197         }
6198         my $patch_max = gitweb_check_feature('patches');
6199         if ($patch_max) {
6200                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6201                         $paging_nav .= " &sdot; " .
6202                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6203                                         "patches");
6204                 }
6205         }
6206
6207         git_header_html();
6208         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6209         git_print_header_div('summary', $project);
6210
6211         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6212
6213         git_footer_html();
6214 }
6215
6216 ## ......................................................................
6217 ## feeds (RSS, Atom; OPML)
6218
6219 sub git_feed {
6220         my $format = shift || 'atom';
6221         my $have_blame = gitweb_check_feature('blame');
6222
6223         # Atom: http://www.atomenabled.org/developers/syndication/
6224         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6225         if ($format ne 'rss' && $format ne 'atom') {
6226                 die_error(400, "Unknown web feed format");
6227         }
6228
6229         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6230         my $head = $hash || 'HEAD';
6231         my @commitlist = parse_commits($head, 150, 0, $file_name);
6232
6233         my %latest_commit;
6234         my %latest_date;
6235         my $content_type = "application/$format+xml";
6236         if (defined $cgi->http('HTTP_ACCEPT') &&
6237                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6238                 # browser (feed reader) prefers text/xml
6239                 $content_type = 'text/xml';
6240         }
6241         if (defined($commitlist[0])) {
6242                 %latest_commit = %{$commitlist[0]};
6243                 my $latest_epoch = $latest_commit{'committer_epoch'};
6244                 %latest_date   = parse_date($latest_epoch);
6245                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6246                 if (defined $if_modified) {
6247                         my $since;
6248                         if (eval { require HTTP::Date; 1; }) {
6249                                 $since = HTTP::Date::str2time($if_modified);
6250                         } elsif (eval { require Time::ParseDate; 1; }) {
6251                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6252                         }
6253                         if (defined $since && $latest_epoch <= $since) {
6254                                 print $cgi->header(
6255                                         -type => $content_type,
6256                                         -charset => 'utf-8',
6257                                         -last_modified => $latest_date{'rfc2822'},
6258                                         -status => '304 Not Modified');
6259                                 return;
6260                         }
6261                 }
6262                 print $cgi->header(
6263                         -type => $content_type,
6264                         -charset => 'utf-8',
6265                         -last_modified => $latest_date{'rfc2822'});
6266         } else {
6267                 print $cgi->header(
6268                         -type => $content_type,
6269                         -charset => 'utf-8');
6270         }
6271
6272         # Optimization: skip generating the body if client asks only
6273         # for Last-Modified date.
6274         return if ($cgi->request_method() eq 'HEAD');
6275
6276         # header variables
6277         my $title = "$site_name - $project/$action";
6278         my $feed_type = 'log';
6279         if (defined $hash) {
6280                 $title .= " - '$hash'";
6281                 $feed_type = 'branch log';
6282                 if (defined $file_name) {
6283                         $title .= " :: $file_name";
6284                         $feed_type = 'history';
6285                 }
6286         } elsif (defined $file_name) {
6287                 $title .= " - $file_name";
6288                 $feed_type = 'history';
6289         }
6290         $title .= " $feed_type";
6291         my $descr = git_get_project_description($project);
6292         if (defined $descr) {
6293                 $descr = esc_html($descr);
6294         } else {
6295                 $descr = "$project " .
6296                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6297                          " feed";
6298         }
6299         my $owner = git_get_project_owner($project);
6300         $owner = esc_html($owner);
6301
6302         #header
6303         my $alt_url;
6304         if (defined $file_name) {
6305                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6306         } elsif (defined $hash) {
6307                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6308         } else {
6309                 $alt_url = href(-full=>1, action=>"summary");
6310         }
6311         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6312         if ($format eq 'rss') {
6313                 print <<XML;
6314 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6315 <channel>
6316 XML
6317                 print "<title>$title</title>\n" .
6318                       "<link>$alt_url</link>\n" .
6319                       "<description>$descr</description>\n" .
6320                       "<language>en</language>\n" .
6321                       # project owner is responsible for 'editorial' content
6322                       "<managingEditor>$owner</managingEditor>\n";
6323                 if (defined $logo || defined $favicon) {
6324                         # prefer the logo to the favicon, since RSS
6325                         # doesn't allow both
6326                         my $img = esc_url($logo || $favicon);
6327                         print "<image>\n" .
6328                               "<url>$img</url>\n" .
6329                               "<title>$title</title>\n" .
6330                               "<link>$alt_url</link>\n" .
6331                               "</image>\n";
6332                 }
6333                 if (%latest_date) {
6334                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6335                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6336                 }
6337                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6338         } elsif ($format eq 'atom') {
6339                 print <<XML;
6340 <feed xmlns="http://www.w3.org/2005/Atom">
6341 XML
6342                 print "<title>$title</title>\n" .
6343                       "<subtitle>$descr</subtitle>\n" .
6344                       '<link rel="alternate" type="text/html" href="' .
6345                       $alt_url . '" />' . "\n" .
6346                       '<link rel="self" type="' . $content_type . '" href="' .
6347                       $cgi->self_url() . '" />' . "\n" .
6348                       "<id>" . href(-full=>1) . "</id>\n" .
6349                       # use project owner for feed author
6350                       "<author><name>$owner</name></author>\n";
6351                 if (defined $favicon) {
6352                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6353                 }
6354                 if (defined $logo_url) {
6355                         # not twice as wide as tall: 72 x 27 pixels
6356                         print "<logo>" . esc_url($logo) . "</logo>\n";
6357                 }
6358                 if (! %latest_date) {
6359                         # dummy date to keep the feed valid until commits trickle in:
6360                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6361                 } else {
6362                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6363                 }
6364                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6365         }
6366
6367         # contents
6368         for (my $i = 0; $i <= $#commitlist; $i++) {
6369                 my %co = %{$commitlist[$i]};
6370                 my $commit = $co{'id'};
6371                 # we read 150, we always show 30 and the ones more recent than 48 hours
6372                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6373                         last;
6374                 }
6375                 my %cd = parse_date($co{'author_epoch'});
6376
6377                 # get list of changed files
6378                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6379                         $co{'parent'} || "--root",
6380                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6381                         or next;
6382                 my @difftree = map { chomp; $_ } <$fd>;
6383                 close $fd
6384                         or next;
6385
6386                 # print element (entry, item)
6387                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6388                 if ($format eq 'rss') {
6389                         print "<item>\n" .
6390                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6391                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6392                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6393                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6394                               "<link>$co_url</link>\n" .
6395                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6396                               "<content:encoded>" .
6397                               "<![CDATA[\n";
6398                 } elsif ($format eq 'atom') {
6399                         print "<entry>\n" .
6400                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6401                               "<updated>$cd{'iso-8601'}</updated>\n" .
6402                               "<author>\n" .
6403                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6404                         if ($co{'author_email'}) {
6405                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6406                         }
6407                         print "</author>\n" .
6408                               # use committer for contributor
6409                               "<contributor>\n" .
6410                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6411                         if ($co{'committer_email'}) {
6412                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6413                         }
6414                         print "</contributor>\n" .
6415                               "<published>$cd{'iso-8601'}</published>\n" .
6416                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6417                               "<id>$co_url</id>\n" .
6418                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6419                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6420                 }
6421                 my $comment = $co{'comment'};
6422                 print "<pre>\n";
6423                 foreach my $line (@$comment) {
6424                         $line = esc_html($line);
6425                         print "$line\n";
6426                 }
6427                 print "</pre><ul>\n";
6428                 foreach my $difftree_line (@difftree) {
6429                         my %difftree = parse_difftree_raw_line($difftree_line);
6430                         next if !$difftree{'from_id'};
6431
6432                         my $file = $difftree{'file'} || $difftree{'to_file'};
6433
6434                         print "<li>" .
6435                               "[" .
6436                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6437                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6438                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6439                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6440                                       -title => "diff"}, 'D');
6441                         if ($have_blame) {
6442                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6443                                                              file_name=>$file, hash_base=>$commit),
6444                                               -title => "blame"}, 'B');
6445                         }
6446                         # if this is not a feed of a file history
6447                         if (!defined $file_name || $file_name ne $file) {
6448                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6449                                                              file_name=>$file, hash=>$commit),
6450                                               -title => "history"}, 'H');
6451                         }
6452                         $file = esc_path($file);
6453                         print "] ".
6454                               "$file</li>\n";
6455                 }
6456                 if ($format eq 'rss') {
6457                         print "</ul>]]>\n" .
6458                               "</content:encoded>\n" .
6459                               "</item>\n";
6460                 } elsif ($format eq 'atom') {
6461                         print "</ul>\n</div>\n" .
6462                               "</content>\n" .
6463                               "</entry>\n";
6464                 }
6465         }
6466
6467         # end of feed
6468         if ($format eq 'rss') {
6469                 print "</channel>\n</rss>\n";
6470         } elsif ($format eq 'atom') {
6471                 print "</feed>\n";
6472         }
6473 }
6474
6475 sub git_rss {
6476         git_feed('rss');
6477 }
6478
6479 sub git_atom {
6480         git_feed('atom');
6481 }
6482
6483 sub git_opml {
6484         my @list = git_get_projects_list();
6485
6486         print $cgi->header(
6487                 -type => 'text/xml',
6488                 -charset => 'utf-8',
6489                 -content_disposition => 'inline; filename="opml.xml"');
6490
6491         print <<XML;
6492 <?xml version="1.0" encoding="utf-8"?>
6493 <opml version="1.0">
6494 <head>
6495   <title>$site_name OPML Export</title>
6496 </head>
6497 <body>
6498 <outline text="git RSS feeds">
6499 XML
6500
6501         foreach my $pr (@list) {
6502                 my %proj = %$pr;
6503                 my $head = git_get_head_hash($proj{'path'});
6504                 if (!defined $head) {
6505                         next;
6506                 }
6507                 $git_dir = "$projectroot/$proj{'path'}";
6508                 my %co = parse_commit($head);
6509                 if (!%co) {
6510                         next;
6511                 }
6512
6513                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6514                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6515                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6516                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6517         }
6518         print <<XML;
6519 </outline>
6520 </body>
6521 </opml>
6522 XML
6523 }