Lady’s Gitweb - Gitweb/blob - 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 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89
  90 # URI of GIT logo (72x27 size)
  91 our $logo = "++GITWEB_LOGO++";
  92 # URI of GIT favicon, assumed to be image/png type
  93 our $favicon = "++GITWEB_FAVICON++";
  94
  95 # URI and label (title) of GIT logo link
  96 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  97 #our $logo_label = "git documentation";
  98 our $logo_url = "http://git.or.cz/";
  99 our $logo_label = "git homepage";
 100
 101 # source of projects list
 102 our $projects_list = "++GITWEB_LIST++";
 103
 104 # the width (in characters) of the projects list "Description" column
 105 our $projects_list_description_width = 25;
 106
 107 # default order of projects list
 108 # valid values are none, project, descr, owner, and age
 109 our $default_projects_order = "project";
 110
 111 # show repository only if this file exists
 112 # (only effective if this variable evaluates to true)
 113 our $export_ok = "++GITWEB_EXPORT_OK++";
 114
 115 # show repository only if this subroutine returns true
 116 # when given the path to the project, for example:
 117 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 118 our $export_auth_hook = undef;
 119
 120 # only allow viewing of repositories also shown on the overview page
 121 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 122
 123 # list of git base URLs used for URL to where fetch project from,
 124 # i.e. full URL is "$git_base_url/$project"
 125 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 126
 127 # default blob_plain mimetype and default charset for text/plain blob
 128 our $default_blob_plain_mimetype = 'text/plain';
 129 our $default_text_plain_charset  = undef;
 130
 131 # file to use for guessing MIME types before trying /etc/mime.types
 132 # (relative to the current git repository)
 133 our $mimetypes_file = undef;
 134
 135 # assume this charset if line contains non-UTF-8 characters;
 136 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 137 # for which encoding all byte sequences are valid, for example
 138 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 139 # could be even 'utf-8' for the old behavior)
 140 our $fallback_encoding = 'latin1';
 141
 142 # rename detection options for git-diff and git-diff-tree
 143 # - default is '-M', with the cost proportional to
 144 #   (number of removed files) * (number of new files).
 145 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 146 #   (number of changed files + number of removed files) * (number of new files)
 147 # - even more costly is '-C', '--find-copies-harder' with cost
 148 #   (number of files in the original tree) * (number of new files)
 149 # - one might want to include '-B' option, e.g. '-B', '-M'
 150 our @diff_opts = ('-M'); # taken from git_commit
 151
 152 # Disables features that would allow repository owners to inject script into
 153 # the gitweb domain.
 154 our $prevent_xss = 0;
 155
 156 # information about snapshot formats that gitweb is capable of serving
 157 our %known_snapshot_formats = (
 158         # name => {
 159         #       'display' => display name,
 160         #       'type' => mime type,
 161         #       'suffix' => filename suffix,
 162         #       'format' => --format for git-archive,
 163         #       'compressor' => [compressor command and arguments]
 164         #                       (array reference, optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'zip' => {
 181                 'display' => 'zip',
 182                 'type' => 'application/x-zip',
 183                 'suffix' => '.zip',
 184                 'format' => 'zip'},
 185 );
 186
 187 # Aliases so we understand old gitweb.snapshot values in repository
 188 # configuration.
 189 our %known_snapshot_format_aliases = (
 190         'gzip'  => 'tgz',
 191         'bzip2' => 'tbz2',
 192
 193         # backward compatibility: legacy gitweb config support
 194         'x-gzip' => undef, 'gz' => undef,
 195         'x-bzip2' => undef, 'bz2' => undef,
 196         'x-zip' => undef, '' => undef,
 197 );
 198
 199 # You define site-wide feature defaults here; override them with
 200 # $GITWEB_CONFIG as necessary.
 201 our %feature = (
 202         # feature => {
 203         #       'sub' => feature-sub (subroutine),
 204         #       'override' => allow-override (boolean),
 205         #       'default' => [ default options...] (array reference)}
 206         #
 207         # if feature is overridable (it means that allow-override has true value),
 208         # then feature-sub will be called with default options as parameters;
 209         # return value of feature-sub indicates if to enable specified feature
 210         #
 211         # if there is no 'sub' key (no feature-sub), then feature cannot be
 212         # overriden
 213         #
 214         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 215         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 216         # is enabled
 217
 218         # Enable the 'blame' blob view, showing the last commit that modified
 219         # each line in the file. This can be very CPU-intensive.
 220
 221         # To enable system wide have in $GITWEB_CONFIG
 222         # $feature{'blame'}{'default'} = [1];
 223         # To have project specific config enable override in $GITWEB_CONFIG
 224         # $feature{'blame'}{'override'} = 1;
 225         # and in project config gitweb.blame = 0|1;
 226         'blame' => {
 227                 'sub' => sub { feature_bool('blame', @_) },
 228                 'override' => 0,
 229                 'default' => [0]},
 230
 231         # Enable the 'snapshot' link, providing a compressed archive of any
 232         # tree. This can potentially generate high traffic if you have large
 233         # project.
 234
 235         # Value is a list of formats defined in %known_snapshot_formats that
 236         # you wish to offer.
 237         # To disable system wide have in $GITWEB_CONFIG
 238         # $feature{'snapshot'}{'default'} = [];
 239         # To have project specific config enable override in $GITWEB_CONFIG
 240         # $feature{'snapshot'}{'override'} = 1;
 241         # and in project config, a comma-separated list of formats or "none"
 242         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 243         'snapshot' => {
 244                 'sub' => \&feature_snapshot,
 245                 'override' => 0,
 246                 'default' => ['tgz']},
 247
 248         # Enable text search, which will list the commits which match author,
 249         # committer or commit text to a given string.  Enabled by default.
 250         # Project specific override is not supported.
 251         'search' => {
 252                 'override' => 0,
 253                 'default' => [1]},
 254
 255         # Enable grep search, which will list the files in currently selected
 256         # tree containing the given string. Enabled by default. This can be
 257         # potentially CPU-intensive, of course.
 258
 259         # To enable system wide have in $GITWEB_CONFIG
 260         # $feature{'grep'}{'default'} = [1];
 261         # To have project specific config enable override in $GITWEB_CONFIG
 262         # $feature{'grep'}{'override'} = 1;
 263         # and in project config gitweb.grep = 0|1;
 264         'grep' => {
 265                 'sub' => sub { feature_bool('grep', @_) },
 266                 'override' => 0,
 267                 'default' => [1]},
 268
 269         # Enable the pickaxe search, which will list the commits that modified
 270         # a given string in a file. This can be practical and quite faster
 271         # alternative to 'blame', but still potentially CPU-intensive.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'pickaxe'}{'default'} = [1];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'pickaxe'}{'override'} = 1;
 277         # and in project config gitweb.pickaxe = 0|1;
 278         'pickaxe' => {
 279                 'sub' => sub { feature_bool('pickaxe', @_) },
 280                 'override' => 0,
 281                 'default' => [1]},
 282
 283         # Make gitweb use an alternative format of the URLs which can be
 284         # more readable and natural-looking: project name is embedded
 285         # directly in the path and the query string contains other
 286         # auxiliary information. All gitweb installations recognize
 287         # URL in either format; this configures in which formats gitweb
 288         # generates links.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pathinfo'}{'default'} = [1];
 292         # Project specific override is not supported.
 293
 294         # Note that you will need to change the default location of CSS,
 295         # favicon, logo and possibly other files to an absolute URL. Also,
 296         # if gitweb.cgi serves as your indexfile, you will need to force
 297         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 298         'pathinfo' => {
 299                 'override' => 0,
 300                 'default' => [0]},
 301
 302         # Make gitweb consider projects in project root subdirectories
 303         # to be forks of existing projects. Given project $projname.git,
 304         # projects matching $projname/*.git will not be shown in the main
 305         # projects list, instead a '+' mark will be added to $projname
 306         # there and a 'forks' view will be enabled for the project, listing
 307         # all the forks. If project list is taken from a file, forks have
 308         # to be listed after the main project.
 309
 310         # To enable system wide have in $GITWEB_CONFIG
 311         # $feature{'forks'}{'default'} = [1];
 312         # Project specific override is not supported.
 313         'forks' => {
 314                 'override' => 0,
 315                 'default' => [0]},
 316
 317         # Insert custom links to the action bar of all project pages.
 318         # This enables you mainly to link to third-party scripts integrating
 319         # into gitweb; e.g. git-browser for graphical history representation
 320         # or custom web-based repository administration interface.
 321
 322         # The 'default' value consists of a list of triplets in the form
 323         # (label, link, position) where position is the label after which
 324         # to insert the link and link is a format string where %n expands
 325         # to the project name, %f to the project path within the filesystem,
 326         # %h to the current hash (h gitweb parameter) and %b to the current
 327         # hash base (hb gitweb parameter); %% expands to %.
 328
 329         # To enable system wide have in $GITWEB_CONFIG e.g.
 330         # $feature{'actions'}{'default'} = [('graphiclog',
 331         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 332         # Project specific override is not supported.
 333         'actions' => {
 334                 'override' => 0,
 335                 'default' => []},
 336
 337         # Allow gitweb scan project content tags described in ctags/
 338         # of project repository, and display the popular Web 2.0-ish
 339         # "tag cloud" near the project list. Note that this is something
 340         # COMPLETELY different from the normal Git tags.
 341
 342         # gitweb by itself can show existing tags, but it does not handle
 343         # tagging itself; you need an external application for that.
 344         # For an example script, check Girocco's cgi/tagproj.cgi.
 345         # You may want to install the HTML::TagCloud Perl module to get
 346         # a pretty tag cloud instead of just a list of tags.
 347
 348         # To enable system wide have in $GITWEB_CONFIG
 349         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 350         # Project specific override is not supported.
 351         'ctags' => {
 352                 'override' => 0,
 353                 'default' => [0]},
 354
 355         # The maximum number of patches in a patchset generated in patch
 356         # view. Set this to 0 or undef to disable patch view, or to a
 357         # negative number to remove any limit.
 358
 359         # To disable system wide have in $GITWEB_CONFIG
 360         # $feature{'patches'}{'default'} = [0];
 361         # To have project specific config enable override in $GITWEB_CONFIG
 362         # $feature{'patches'}{'override'} = 1;
 363         # and in project config gitweb.patches = 0|n;
 364         # where n is the maximum number of patches allowed in a patchset.
 365         'patches' => {
 366                 'sub' => \&feature_patches,
 367                 'override' => 0,
 368                 'default' => [16]},
 369 );
 370
 371 sub gitweb_get_feature {
 372         my ($name) = @_;
 373         return unless exists $feature{$name};
 374         my ($sub, $override, @defaults) = (
 375                 $feature{$name}{'sub'},
 376                 $feature{$name}{'override'},
 377                 @{$feature{$name}{'default'}});
 378         if (!$override) { return @defaults; }
 379         if (!defined $sub) {
 380                 warn "feature $name is not overrideable";
 381                 return @defaults;
 382         }
 383         return $sub->(@defaults);
 384 }
 385
 386 # A wrapper to check if a given feature is enabled.
 387 # With this, you can say
 388 #
 389 #   my $bool_feat = gitweb_check_feature('bool_feat');
 390 #   gitweb_check_feature('bool_feat') or somecode;
 391 #
 392 # instead of
 393 #
 394 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 395 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 396 #
 397 sub gitweb_check_feature {
 398         return (gitweb_get_feature(@_))[0];
 399 }
 400
 401
 402 sub feature_bool {
 403         my $key = shift;
 404         my ($val) = git_get_project_config($key, '--bool');
 405
 406         if ($val eq 'true') {
 407                 return (1);
 408         } elsif ($val eq 'false') {
 409                 return (0);
 410         }
 411
 412         return ($_[0]);
 413 }
 414
 415 sub feature_snapshot {
 416         my (@fmts) = @_;
 417
 418         my ($val) = git_get_project_config('snapshot');
 419
 420         if ($val) {
 421                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 422         }
 423
 424         return @fmts;
 425 }
 426
 427 sub feature_patches {
 428         my @val = (git_get_project_config('patches', '--int'));
 429
 430         if (@val) {
 431                 return @val;
 432         }
 433
 434         return ($_[0]);
 435 }
 436
 437 # checking HEAD file with -e is fragile if the repository was
 438 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 439 # and then pruned.
 440 sub check_head_link {
 441         my ($dir) = @_;
 442         my $headfile = "$dir/HEAD";
 443         return ((-e $headfile) ||
 444                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 445 }
 446
 447 sub check_export_ok {
 448         my ($dir) = @_;
 449         return (check_head_link($dir) &&
 450                 (!$export_ok || -e "$dir/$export_ok") &&
 451                 (!$export_auth_hook || $export_auth_hook->($dir)));
 452 }
 453
 454 # process alternate names for backward compatibility
 455 # filter out unsupported (unknown) snapshot formats
 456 sub filter_snapshot_fmts {
 457         my @fmts = @_;
 458
 459         @fmts = map {
 460                 exists $known_snapshot_format_aliases{$_} ?
 461                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 462         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 463
 464 }
 465
 466 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 467 if (-e $GITWEB_CONFIG) {
 468         do $GITWEB_CONFIG;
 469 } else {
 470         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 471         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 472 }
 473
 474 # version of the core git binary
 475 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 476
 477 $projects_list ||= $projectroot;
 478
 479 # ======================================================================
 480 # input validation and dispatch
 481
 482 # input parameters can be collected from a variety of sources (presently, CGI
 483 # and PATH_INFO), so we define an %input_params hash that collects them all
 484 # together during validation: this allows subsequent uses (e.g. href()) to be
 485 # agnostic of the parameter origin
 486
 487 our %input_params = ();
 488
 489 # input parameters are stored with the long parameter name as key. This will
 490 # also be used in the href subroutine to convert parameters to their CGI
 491 # equivalent, and since the href() usage is the most frequent one, we store
 492 # the name -> CGI key mapping here, instead of the reverse.
 493 #
 494 # XXX: Warning: If you touch this, check the search form for updating,
 495 # too.
 496
 497 our @cgi_param_mapping = (
 498         project => "p",
 499         action => "a",
 500         file_name => "f",
 501         file_parent => "fp",
 502         hash => "h",
 503         hash_parent => "hp",
 504         hash_base => "hb",
 505         hash_parent_base => "hpb",
 506         page => "pg",
 507         order => "o",
 508         searchtext => "s",
 509         searchtype => "st",
 510         snapshot_format => "sf",
 511         extra_options => "opt",
 512         search_use_regexp => "sr",
 513 );
 514 our %cgi_param_mapping = @cgi_param_mapping;
 515
 516 # we will also need to know the possible actions, for validation
 517 our %actions = (
 518         "blame" => \&git_blame,
 519         "blobdiff" => \&git_blobdiff,
 520         "blobdiff_plain" => \&git_blobdiff_plain,
 521         "blob" => \&git_blob,
 522         "blob_plain" => \&git_blob_plain,
 523         "commitdiff" => \&git_commitdiff,
 524         "commitdiff_plain" => \&git_commitdiff_plain,
 525         "commit" => \&git_commit,
 526         "forks" => \&git_forks,
 527         "heads" => \&git_heads,
 528         "history" => \&git_history,
 529         "log" => \&git_log,
 530         "patch" => \&git_patch,
 531         "patches" => \&git_patches,
 532         "rss" => \&git_rss,
 533         "atom" => \&git_atom,
 534         "search" => \&git_search,
 535         "search_help" => \&git_search_help,
 536         "shortlog" => \&git_shortlog,
 537         "summary" => \&git_summary,
 538         "tag" => \&git_tag,
 539         "tags" => \&git_tags,
 540         "tree" => \&git_tree,
 541         "snapshot" => \&git_snapshot,
 542         "object" => \&git_object,
 543         # those below don't need $project
 544         "opml" => \&git_opml,
 545         "project_list" => \&git_project_list,
 546         "project_index" => \&git_project_index,
 547 );
 548
 549 # finally, we have the hash of allowed extra_options for the commands that
 550 # allow them
 551 our %allowed_options = (
 552         "--no-merges" => [ qw(rss atom log shortlog history) ],
 553 );
 554
 555 # fill %input_params with the CGI parameters. All values except for 'opt'
 556 # should be single values, but opt can be an array. We should probably
 557 # build an array of parameters that can be multi-valued, but since for the time
 558 # being it's only this one, we just single it out
 559 while (my ($name, $symbol) = each %cgi_param_mapping) {
 560         if ($symbol eq 'opt') {
 561                 $input_params{$name} = [ $cgi->param($symbol) ];
 562         } else {
 563                 $input_params{$name} = $cgi->param($symbol);
 564         }
 565 }
 566
 567 # now read PATH_INFO and update the parameter list for missing parameters
 568 sub evaluate_path_info {
 569         return if defined $input_params{'project'};
 570         return if !$path_info;
 571         $path_info =~ s,^/+,,;
 572         return if !$path_info;
 573
 574         # find which part of PATH_INFO is project
 575         my $project = $path_info;
 576         $project =~ s,/+$,,;
 577         while ($project && !check_head_link("$projectroot/$project")) {
 578                 $project =~ s,/*[^/]*$,,;
 579         }
 580         return unless $project;
 581         $input_params{'project'} = $project;
 582
 583         # do not change any parameters if an action is given using the query string
 584         return if $input_params{'action'};
 585         $path_info =~ s,^\Q$project\E/*,,;
 586
 587         # next, check if we have an action
 588         my $action = $path_info;
 589         $action =~ s,/.*$,,;
 590         if (exists $actions{$action}) {
 591                 $path_info =~ s,^$action/*,,;
 592                 $input_params{'action'} = $action;
 593         }
 594
 595         # list of actions that want hash_base instead of hash, but can have no
 596         # pathname (f) parameter
 597         my @wants_base = (
 598                 'tree',
 599                 'history',
 600         );
 601
 602         # we want to catch
 603         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 604         my ($parentrefname, $parentpathname, $refname, $pathname) =
 605                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 606
 607         # first, analyze the 'current' part
 608         if (defined $pathname) {
 609                 # we got "branch:filename" or "branch:dir/"
 610                 # we could use git_get_type(branch:pathname), but:
 611                 # - it needs $git_dir
 612                 # - it does a git() call
 613                 # - the convention of terminating directories with a slash
 614                 #   makes it superfluous
 615                 # - embedding the action in the PATH_INFO would make it even
 616                 #   more superfluous
 617                 $pathname =~ s,^/+,,;
 618                 if (!$pathname || substr($pathname, -1) eq "/") {
 619                         $input_params{'action'} ||= "tree";
 620                         $pathname =~ s,/$,,;
 621                 } else {
 622                         # the default action depends on whether we had parent info
 623                         # or not
 624                         if ($parentrefname) {
 625                                 $input_params{'action'} ||= "blobdiff_plain";
 626                         } else {
 627                                 $input_params{'action'} ||= "blob_plain";
 628                         }
 629                 }
 630                 $input_params{'hash_base'} ||= $refname;
 631                 $input_params{'file_name'} ||= $pathname;
 632         } elsif (defined $refname) {
 633                 # we got "branch". In this case we have to choose if we have to
 634                 # set hash or hash_base.
 635                 #
 636                 # Most of the actions without a pathname only want hash to be
 637                 # set, except for the ones specified in @wants_base that want
 638                 # hash_base instead. It should also be noted that hand-crafted
 639                 # links having 'history' as an action and no pathname or hash
 640                 # set will fail, but that happens regardless of PATH_INFO.
 641                 $input_params{'action'} ||= "shortlog";
 642                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 643                         $input_params{'hash_base'} ||= $refname;
 644                 } else {
 645                         $input_params{'hash'} ||= $refname;
 646                 }
 647         }
 648
 649         # next, handle the 'parent' part, if present
 650         if (defined $parentrefname) {
 651                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 652                 # someproject/blobdiff/oldrev..newrev:/filename
 653                 if ($parentpathname) {
 654                         $parentpathname =~ s,^/+,,;
 655                         $parentpathname =~ s,/$,,;
 656                         $input_params{'file_parent'} ||= $parentpathname;
 657                 } else {
 658                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 659                 }
 660                 # we assume that hash_parent_base is wanted if a path was specified,
 661                 # or if the action wants hash_base instead of hash
 662                 if (defined $input_params{'file_parent'} ||
 663                         grep { $_ eq $input_params{'action'} } @wants_base) {
 664                         $input_params{'hash_parent_base'} ||= $parentrefname;
 665                 } else {
 666                         $input_params{'hash_parent'} ||= $parentrefname;
 667                 }
 668         }
 669
 670         # for the snapshot action, we allow URLs in the form
 671         # $project/snapshot/$hash.ext
 672         # where .ext determines the snapshot and gets removed from the
 673         # passed $refname to provide the $hash.
 674         #
 675         # To be able to tell that $refname includes the format extension, we
 676         # require the following two conditions to be satisfied:
 677         # - the hash input parameter MUST have been set from the $refname part
 678         #   of the URL (i.e. they must be equal)
 679         # - the snapshot format MUST NOT have been defined already (e.g. from
 680         #   CGI parameter sf)
 681         # It's also useless to try any matching unless $refname has a dot,
 682         # so we check for that too
 683         if (defined $input_params{'action'} &&
 684                 $input_params{'action'} eq 'snapshot' &&
 685                 defined $refname && index($refname, '.') != -1 &&
 686                 $refname eq $input_params{'hash'} &&
 687                 !defined $input_params{'snapshot_format'}) {
 688                 # We loop over the known snapshot formats, checking for
 689                 # extensions. Allowed extensions are both the defined suffix
 690                 # (which includes the initial dot already) and the snapshot
 691                 # format key itself, with a prepended dot
 692                 while (my ($fmt, %opt) = each %known_snapshot_formats) {
 693                         my $hash = $refname;
 694                         my $sfx;
 695                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 696                         next unless $sfx = $1;
 697                         # a valid suffix was found, so set the snapshot format
 698                         # and reset the hash parameter
 699                         $input_params{'snapshot_format'} = $fmt;
 700                         $input_params{'hash'} = $hash;
 701                         # we also set the format suffix to the one requested
 702                         # in the URL: this way a request for e.g. .tgz returns
 703                         # a .tgz instead of a .tar.gz
 704                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 705                         last;
 706                 }
 707         }
 708 }
 709 evaluate_path_info();
 710
 711 our $action = $input_params{'action'};
 712 if (defined $action) {
 713         if (!validate_action($action)) {
 714                 die_error(400, "Invalid action parameter");
 715         }
 716 }
 717
 718 # parameters which are pathnames
 719 our $project = $input_params{'project'};
 720 if (defined $project) {
 721         if (!validate_project($project)) {
 722                 undef $project;
 723                 die_error(404, "No such project");
 724         }
 725 }
 726
 727 our $file_name = $input_params{'file_name'};
 728 if (defined $file_name) {
 729         if (!validate_pathname($file_name)) {
 730                 die_error(400, "Invalid file parameter");
 731         }
 732 }
 733
 734 our $file_parent = $input_params{'file_parent'};
 735 if (defined $file_parent) {
 736         if (!validate_pathname($file_parent)) {
 737                 die_error(400, "Invalid file parent parameter");
 738         }
 739 }
 740
 741 # parameters which are refnames
 742 our $hash = $input_params{'hash'};
 743 if (defined $hash) {
 744         if (!validate_refname($hash)) {
 745                 die_error(400, "Invalid hash parameter");
 746         }
 747 }
 748
 749 our $hash_parent = $input_params{'hash_parent'};
 750 if (defined $hash_parent) {
 751         if (!validate_refname($hash_parent)) {
 752                 die_error(400, "Invalid hash parent parameter");
 753         }
 754 }
 755
 756 our $hash_base = $input_params{'hash_base'};
 757 if (defined $hash_base) {
 758         if (!validate_refname($hash_base)) {
 759                 die_error(400, "Invalid hash base parameter");
 760         }
 761 }
 762
 763 our @extra_options = @{$input_params{'extra_options'}};
 764 # @extra_options is always defined, since it can only be (currently) set from
 765 # CGI, and $cgi->param() returns the empty array in array context if the param
 766 # is not set
 767 foreach my $opt (@extra_options) {
 768         if (not exists $allowed_options{$opt}) {
 769                 die_error(400, "Invalid option parameter");
 770         }
 771         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 772                 die_error(400, "Invalid option parameter for this action");
 773         }
 774 }
 775
 776 our $hash_parent_base = $input_params{'hash_parent_base'};
 777 if (defined $hash_parent_base) {
 778         if (!validate_refname($hash_parent_base)) {
 779                 die_error(400, "Invalid hash parent base parameter");
 780         }
 781 }
 782
 783 # other parameters
 784 our $page = $input_params{'page'};
 785 if (defined $page) {
 786         if ($page =~ m/[^0-9]/) {
 787                 die_error(400, "Invalid page parameter");
 788         }
 789 }
 790
 791 our $searchtype = $input_params{'searchtype'};
 792 if (defined $searchtype) {
 793         if ($searchtype =~ m/[^a-z]/) {
 794                 die_error(400, "Invalid searchtype parameter");
 795         }
 796 }
 797
 798 our $search_use_regexp = $input_params{'search_use_regexp'};
 799
 800 our $searchtext = $input_params{'searchtext'};
 801 our $search_regexp;
 802 if (defined $searchtext) {
 803         if (length($searchtext) < 2) {
 804                 die_error(403, "At least two characters are required for search parameter");
 805         }
 806         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 807 }
 808
 809 # path to the current git repository
 810 our $git_dir;
 811 $git_dir = "$projectroot/$project" if $project;
 812
 813 # list of supported snapshot formats
 814 our @snapshot_fmts = gitweb_get_feature('snapshot');
 815 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 816
 817 # dispatch
 818 if (!defined $action) {
 819         if (defined $hash) {
 820                 $action = git_get_type($hash);
 821         } elsif (defined $hash_base && defined $file_name) {
 822                 $action = git_get_type("$hash_base:$file_name");
 823         } elsif (defined $project) {
 824                 $action = 'summary';
 825         } else {
 826                 $action = 'project_list';
 827         }
 828 }
 829 if (!defined($actions{$action})) {
 830         die_error(400, "Unknown action");
 831 }
 832 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 833     !$project) {
 834         die_error(400, "Project needed");
 835 }
 836 $actions{$action}->();
 837 exit;
 838
 839 ## ======================================================================
 840 ## action links
 841
 842 sub href (%) {
 843         my %params = @_;
 844         # default is to use -absolute url() i.e. $my_uri
 845         my $href = $params{-full} ? $my_url : $my_uri;
 846
 847         $params{'project'} = $project unless exists $params{'project'};
 848
 849         if ($params{-replay}) {
 850                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 851                         if (!exists $params{$name}) {
 852                                 $params{$name} = $input_params{$name};
 853                         }
 854                 }
 855         }
 856
 857         my $use_pathinfo = gitweb_check_feature('pathinfo');
 858         if ($use_pathinfo and defined $params{'project'}) {
 859                 # try to put as many parameters as possible in PATH_INFO:
 860                 #   - project name
 861                 #   - action
 862                 #   - hash_parent or hash_parent_base:/file_parent
 863                 #   - hash or hash_base:/filename
 864                 #   - the snapshot_format as an appropriate suffix
 865
 866                 # When the script is the root DirectoryIndex for the domain,
 867                 # $href here would be something like http://gitweb.example.com/
 868                 # Thus, we strip any trailing / from $href, to spare us double
 869                 # slashes in the final URL
 870                 $href =~ s,/$,,;
 871
 872                 # Then add the project name, if present
 873                 $href .= "/".esc_url($params{'project'});
 874                 delete $params{'project'};
 875
 876                 # since we destructively absorb parameters, we keep this
 877                 # boolean that remembers if we're handling a snapshot
 878                 my $is_snapshot = $params{'action'} eq 'snapshot';
 879
 880                 # Summary just uses the project path URL, any other action is
 881                 # added to the URL
 882                 if (defined $params{'action'}) {
 883                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 884                         delete $params{'action'};
 885                 }
 886
 887                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 888                 # stripping nonexistent or useless pieces
 889                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 890                         || $params{'hash_parent'} || $params{'hash'});
 891                 if (defined $params{'hash_base'}) {
 892                         if (defined $params{'hash_parent_base'}) {
 893                                 $href .= esc_url($params{'hash_parent_base'});
 894                                 # skip the file_parent if it's the same as the file_name
 895                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 896                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 897                                         $href .= ":/".esc_url($params{'file_parent'});
 898                                         delete $params{'file_parent'};
 899                                 }
 900                                 $href .= "..";
 901                                 delete $params{'hash_parent'};
 902                                 delete $params{'hash_parent_base'};
 903                         } elsif (defined $params{'hash_parent'}) {
 904                                 $href .= esc_url($params{'hash_parent'}). "..";
 905                                 delete $params{'hash_parent'};
 906                         }
 907
 908                         $href .= esc_url($params{'hash_base'});
 909                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 910                                 $href .= ":/".esc_url($params{'file_name'});
 911                                 delete $params{'file_name'};
 912                         }
 913                         delete $params{'hash'};
 914                         delete $params{'hash_base'};
 915                 } elsif (defined $params{'hash'}) {
 916                         $href .= esc_url($params{'hash'});
 917                         delete $params{'hash'};
 918                 }
 919
 920                 # If the action was a snapshot, we can absorb the
 921                 # snapshot_format parameter too
 922                 if ($is_snapshot) {
 923                         my $fmt = $params{'snapshot_format'};
 924                         # snapshot_format should always be defined when href()
 925                         # is called, but just in case some code forgets, we
 926                         # fall back to the default
 927                         $fmt ||= $snapshot_fmts[0];
 928                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 929                         delete $params{'snapshot_format'};
 930                 }
 931         }
 932
 933         # now encode the parameters explicitly
 934         my @result = ();
 935         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 936                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 937                 if (defined $params{$name}) {
 938                         if (ref($params{$name}) eq "ARRAY") {
 939                                 foreach my $par (@{$params{$name}}) {
 940                                         push @result, $symbol . "=" . esc_param($par);
 941                                 }
 942                         } else {
 943                                 push @result, $symbol . "=" . esc_param($params{$name});
 944                         }
 945                 }
 946         }
 947         $href .= "?" . join(';', @result) if scalar @result;
 948
 949         return $href;
 950 }
 951
 952
 953 ## ======================================================================
 954 ## validation, quoting/unquoting and escaping
 955
 956 sub validate_action {
 957         my $input = shift || return undef;
 958         return undef unless exists $actions{$input};
 959         return $input;
 960 }
 961
 962 sub validate_project {
 963         my $input = shift || return undef;
 964         if (!validate_pathname($input) ||
 965                 !(-d "$projectroot/$input") ||
 966                 !check_export_ok("$projectroot/$input") ||
 967                 ($strict_export && !project_in_list($input))) {
 968                 return undef;
 969         } else {
 970                 return $input;
 971         }
 972 }
 973
 974 sub validate_pathname {
 975         my $input = shift || return undef;
 976
 977         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 978         # at the beginning, at the end, and between slashes.
 979         # also this catches doubled slashes
 980         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 981                 return undef;
 982         }
 983         # no null characters
 984         if ($input =~ m!\0!) {
 985                 return undef;
 986         }
 987         return $input;
 988 }
 989
 990 sub validate_refname {
 991         my $input = shift || return undef;
 992
 993         # textual hashes are O.K.
 994         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 995                 return $input;
 996         }
 997         # it must be correct pathname
 998         $input = validate_pathname($input)
 999                 or return undef;
1000         # restrictions on ref name according to git-check-ref-format
1001         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1002                 return undef;
1003         }
1004         return $input;
1005 }
1006
1007 # decode sequences of octets in utf8 into Perl's internal form,
1008 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1009 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1010 sub to_utf8 {
1011         my $str = shift;
1012         if (utf8::valid($str)) {
1013                 utf8::decode($str);
1014                 return $str;
1015         } else {
1016                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1017         }
1018 }
1019
1020 # quote unsafe chars, but keep the slash, even when it's not
1021 # correct, but quoted slashes look too horrible in bookmarks
1022 sub esc_param {
1023         my $str = shift;
1024         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1025         $str =~ s/\+/%2B/g;
1026         $str =~ s/ /\+/g;
1027         return $str;
1028 }
1029
1030 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1031 sub esc_url {
1032         my $str = shift;
1033         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1034         $str =~ s/\+/%2B/g;
1035         $str =~ s/ /\+/g;
1036         return $str;
1037 }
1038
1039 # replace invalid utf8 character with SUBSTITUTION sequence
1040 sub esc_html ($;%) {
1041         my $str = shift;
1042         my %opts = @_;
1043
1044         $str = to_utf8($str);
1045         $str = $cgi->escapeHTML($str);
1046         if ($opts{'-nbsp'}) {
1047                 $str =~ s/ /&nbsp;/g;
1048         }
1049         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1050         return $str;
1051 }
1052
1053 # quote control characters and escape filename to HTML
1054 sub esc_path {
1055         my $str = shift;
1056         my %opts = @_;
1057
1058         $str = to_utf8($str);
1059         $str = $cgi->escapeHTML($str);
1060         if ($opts{'-nbsp'}) {
1061                 $str =~ s/ /&nbsp;/g;
1062         }
1063         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1064         return $str;
1065 }
1066
1067 # Make control characters "printable", using character escape codes (CEC)
1068 sub quot_cec {
1069         my $cntrl = shift;
1070         my %opts = @_;
1071         my %es = ( # character escape codes, aka escape sequences
1072                 "\t" => '\t',   # tab            (HT)
1073                 "\n" => '\n',   # line feed      (LF)
1074                 "\r" => '\r',   # carrige return (CR)
1075                 "\f" => '\f',   # form feed      (FF)
1076                 "\b" => '\b',   # backspace      (BS)
1077                 "\a" => '\a',   # alarm (bell)   (BEL)
1078                 "\e" => '\e',   # escape         (ESC)
1079                 "\013" => '\v', # vertical tab   (VT)
1080                 "\000" => '\0', # nul character  (NUL)
1081         );
1082         my $chr = ( (exists $es{$cntrl})
1083                     ? $es{$cntrl}
1084                     : sprintf('\%2x', ord($cntrl)) );
1085         if ($opts{-nohtml}) {
1086                 return $chr;
1087         } else {
1088                 return "<span class=\"cntrl\">$chr</span>";
1089         }
1090 }
1091
1092 # Alternatively use unicode control pictures codepoints,
1093 # Unicode "printable representation" (PR)
1094 sub quot_upr {
1095         my $cntrl = shift;
1096         my %opts = @_;
1097
1098         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1099         if ($opts{-nohtml}) {
1100                 return $chr;
1101         } else {
1102                 return "<span class=\"cntrl\">$chr</span>";
1103         }
1104 }
1105
1106 # git may return quoted and escaped filenames
1107 sub unquote {
1108         my $str = shift;
1109
1110         sub unq {
1111                 my $seq = shift;
1112                 my %es = ( # character escape codes, aka escape sequences
1113                         't' => "\t",   # tab            (HT, TAB)
1114                         'n' => "\n",   # newline        (NL)
1115                         'r' => "\r",   # return         (CR)
1116                         'f' => "\f",   # form feed      (FF)
1117                         'b' => "\b",   # backspace      (BS)
1118                         'a' => "\a",   # alarm (bell)   (BEL)
1119                         'e' => "\e",   # escape         (ESC)
1120                         'v' => "\013", # vertical tab   (VT)
1121                 );
1122
1123                 if ($seq =~ m/^[0-7]{1,3}$/) {
1124                         # octal char sequence
1125                         return chr(oct($seq));
1126                 } elsif (exists $es{$seq}) {
1127                         # C escape sequence, aka character escape code
1128                         return $es{$seq};
1129                 }
1130                 # quoted ordinary character
1131                 return $seq;
1132         }
1133
1134         if ($str =~ m/^"(.*)"$/) {
1135                 # needs unquoting
1136                 $str = $1;
1137                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1138         }
1139         return $str;
1140 }
1141
1142 # escape tabs (convert tabs to spaces)
1143 sub untabify {
1144         my $line = shift;
1145
1146         while ((my $pos = index($line, "\t")) != -1) {
1147                 if (my $count = (8 - ($pos % 8))) {
1148                         my $spaces = ' ' x $count;
1149                         $line =~ s/\t/$spaces/;
1150                 }
1151         }
1152
1153         return $line;
1154 }
1155
1156 sub project_in_list {
1157         my $project = shift;
1158         my @list = git_get_projects_list();
1159         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1160 }
1161
1162 ## ----------------------------------------------------------------------
1163 ## HTML aware string manipulation
1164
1165 # Try to chop given string on a word boundary between position
1166 # $len and $len+$add_len. If there is no word boundary there,
1167 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1168 # (marking chopped part) would be longer than given string.
1169 sub chop_str {
1170         my $str = shift;
1171         my $len = shift;
1172         my $add_len = shift || 10;
1173         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1174
1175         # Make sure perl knows it is utf8 encoded so we don't
1176         # cut in the middle of a utf8 multibyte char.
1177         $str = to_utf8($str);
1178
1179         # allow only $len chars, but don't cut a word if it would fit in $add_len
1180         # if it doesn't fit, cut it if it's still longer than the dots we would add
1181         # remove chopped character entities entirely
1182
1183         # when chopping in the middle, distribute $len into left and right part
1184         # return early if chopping wouldn't make string shorter
1185         if ($where eq 'center') {
1186                 return $str if ($len + 5 >= length($str)); # filler is length 5
1187                 $len = int($len/2);
1188         } else {
1189                 return $str if ($len + 4 >= length($str)); # filler is length 4
1190         }
1191
1192         # regexps: ending and beginning with word part up to $add_len
1193         my $endre = qr/.{$len}\w{0,$add_len}/;
1194         my $begre = qr/\w{0,$add_len}.{$len}/;
1195
1196         if ($where eq 'left') {
1197                 $str =~ m/^(.*?)($begre)$/;
1198                 my ($lead, $body) = ($1, $2);
1199                 if (length($lead) > 4) {
1200                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1201                         $lead = " ...";
1202                 }
1203                 return "$lead$body";
1204
1205         } elsif ($where eq 'center') {
1206                 $str =~ m/^($endre)(.*)$/;
1207                 my ($left, $str)  = ($1, $2);
1208                 $str =~ m/^(.*?)($begre)$/;
1209                 my ($mid, $right) = ($1, $2);
1210                 if (length($mid) > 5) {
1211                         $left  =~ s/&[^;]*$//;
1212                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1213                         $mid = " ... ";
1214                 }
1215                 return "$left$mid$right";
1216
1217         } else {
1218                 $str =~ m/^($endre)(.*)$/;
1219                 my $body = $1;
1220                 my $tail = $2;
1221                 if (length($tail) > 4) {
1222                         $body =~ s/&[^;]*$//;
1223                         $tail = "... ";
1224                 }
1225                 return "$body$tail";
1226         }
1227 }
1228
1229 # takes the same arguments as chop_str, but also wraps a <span> around the
1230 # result with a title attribute if it does get chopped. Additionally, the
1231 # string is HTML-escaped.
1232 sub chop_and_escape_str {
1233         my ($str) = @_;
1234
1235         my $chopped = chop_str(@_);
1236         if ($chopped eq $str) {
1237                 return esc_html($chopped);
1238         } else {
1239                 $str =~ s/([[:cntrl:]])/?/g;
1240                 return $cgi->span({-title=>$str}, esc_html($chopped));
1241         }
1242 }
1243
1244 ## ----------------------------------------------------------------------
1245 ## functions returning short strings
1246
1247 # CSS class for given age value (in seconds)
1248 sub age_class {
1249         my $age = shift;
1250
1251         if (!defined $age) {
1252                 return "noage";
1253         } elsif ($age < 60*60*2) {
1254                 return "age0";
1255         } elsif ($age < 60*60*24*2) {
1256                 return "age1";
1257         } else {
1258                 return "age2";
1259         }
1260 }
1261
1262 # convert age in seconds to "nn units ago" string
1263 sub age_string {
1264         my $age = shift;
1265         my $age_str;
1266
1267         if ($age > 60*60*24*365*2) {
1268                 $age_str = (int $age/60/60/24/365);
1269                 $age_str .= " years ago";
1270         } elsif ($age > 60*60*24*(365/12)*2) {
1271                 $age_str = int $age/60/60/24/(365/12);
1272                 $age_str .= " months ago";
1273         } elsif ($age > 60*60*24*7*2) {
1274                 $age_str = int $age/60/60/24/7;
1275                 $age_str .= " weeks ago";
1276         } elsif ($age > 60*60*24*2) {
1277                 $age_str = int $age/60/60/24;
1278                 $age_str .= " days ago";
1279         } elsif ($age > 60*60*2) {
1280                 $age_str = int $age/60/60;
1281                 $age_str .= " hours ago";
1282         } elsif ($age > 60*2) {
1283                 $age_str = int $age/60;
1284                 $age_str .= " min ago";
1285         } elsif ($age > 2) {
1286                 $age_str = int $age;
1287                 $age_str .= " sec ago";
1288         } else {
1289                 $age_str .= " right now";
1290         }
1291         return $age_str;
1292 }
1293
1294 use constant {
1295         S_IFINVALID => 0030000,
1296         S_IFGITLINK => 0160000,
1297 };
1298
1299 # submodule/subproject, a commit object reference
1300 sub S_ISGITLINK($) {
1301         my $mode = shift;
1302
1303         return (($mode & S_IFMT) == S_IFGITLINK)
1304 }
1305
1306 # convert file mode in octal to symbolic file mode string
1307 sub mode_str {
1308         my $mode = oct shift;
1309
1310         if (S_ISGITLINK($mode)) {
1311                 return 'm---------';
1312         } elsif (S_ISDIR($mode & S_IFMT)) {
1313                 return 'drwxr-xr-x';
1314         } elsif (S_ISLNK($mode)) {
1315                 return 'lrwxrwxrwx';
1316         } elsif (S_ISREG($mode)) {
1317                 # git cares only about the executable bit
1318                 if ($mode & S_IXUSR) {
1319                         return '-rwxr-xr-x';
1320                 } else {
1321                         return '-rw-r--r--';
1322                 };
1323         } else {
1324                 return '----------';
1325         }
1326 }
1327
1328 # convert file mode in octal to file type string
1329 sub file_type {
1330         my $mode = shift;
1331
1332         if ($mode !~ m/^[0-7]+$/) {
1333                 return $mode;
1334         } else {
1335                 $mode = oct $mode;
1336         }
1337
1338         if (S_ISGITLINK($mode)) {
1339                 return "submodule";
1340         } elsif (S_ISDIR($mode & S_IFMT)) {
1341                 return "directory";
1342         } elsif (S_ISLNK($mode)) {
1343                 return "symlink";
1344         } elsif (S_ISREG($mode)) {
1345                 return "file";
1346         } else {
1347                 return "unknown";
1348         }
1349 }
1350
1351 # convert file mode in octal to file type description string
1352 sub file_type_long {
1353         my $mode = shift;
1354
1355         if ($mode !~ m/^[0-7]+$/) {
1356                 return $mode;
1357         } else {
1358                 $mode = oct $mode;
1359         }
1360
1361         if (S_ISGITLINK($mode)) {
1362                 return "submodule";
1363         } elsif (S_ISDIR($mode & S_IFMT)) {
1364                 return "directory";
1365         } elsif (S_ISLNK($mode)) {
1366                 return "symlink";
1367         } elsif (S_ISREG($mode)) {
1368                 if ($mode & S_IXUSR) {
1369                         return "executable";
1370                 } else {
1371                         return "file";
1372                 };
1373         } else {
1374                 return "unknown";
1375         }
1376 }
1377
1378
1379 ## ----------------------------------------------------------------------
1380 ## functions returning short HTML fragments, or transforming HTML fragments
1381 ## which don't belong to other sections
1382
1383 # format line of commit message.
1384 sub format_log_line_html {
1385         my $line = shift;
1386
1387         $line = esc_html($line, -nbsp=>1);
1388         if ($line =~ m/\b([0-9a-fA-F]{8,40})\b/) {
1389                 my $hash_text = $1;
1390                 my $link =
1391                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1392                                 -class => "text"}, $hash_text);
1393                 $line =~ s/$hash_text/$link/;
1394         }
1395         return $line;
1396 }
1397
1398 # format marker of refs pointing to given object
1399
1400 # the destination action is chosen based on object type and current context:
1401 # - for annotated tags, we choose the tag view unless it's the current view
1402 #   already, in which case we go to shortlog view
1403 # - for other refs, we keep the current view if we're in history, shortlog or
1404 #   log view, and select shortlog otherwise
1405 sub format_ref_marker {
1406         my ($refs, $id) = @_;
1407         my $markers = '';
1408
1409         if (defined $refs->{$id}) {
1410                 foreach my $ref (@{$refs->{$id}}) {
1411                         # this code exploits the fact that non-lightweight tags are the
1412                         # only indirect objects, and that they are the only objects for which
1413                         # we want to use tag instead of shortlog as action
1414                         my ($type, $name) = qw();
1415                         my $indirect = ($ref =~ s/\^\{\}$//);
1416                         # e.g. tags/v2.6.11 or heads/next
1417                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1418                                 $type = $1;
1419                                 $name = $2;
1420                         } else {
1421                                 $type = "ref";
1422                                 $name = $ref;
1423                         }
1424
1425                         my $class = $type;
1426                         $class .= " indirect" if $indirect;
1427
1428                         my $dest_action = "shortlog";
1429
1430                         if ($indirect) {
1431                                 $dest_action = "tag" unless $action eq "tag";
1432                         } elsif ($action =~ /^(history|(short)?log)$/) {
1433                                 $dest_action = $action;
1434                         }
1435
1436                         my $dest = "";
1437                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1438                         $dest .= $ref;
1439
1440                         my $link = $cgi->a({
1441                                 -href => href(
1442                                         action=>$dest_action,
1443                                         hash=>$dest
1444                                 )}, $name);
1445
1446                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1447                                 $link . "</span>";
1448                 }
1449         }
1450
1451         if ($markers) {
1452                 return ' <span class="refs">'. $markers . '</span>';
1453         } else {
1454                 return "";
1455         }
1456 }
1457
1458 # format, perhaps shortened and with markers, title line
1459 sub format_subject_html {
1460         my ($long, $short, $href, $extra) = @_;
1461         $extra = '' unless defined($extra);
1462
1463         if (length($short) < length($long)) {
1464                 return $cgi->a({-href => $href, -class => "list subject",
1465                                 -title => to_utf8($long)},
1466                        esc_html($short) . $extra);
1467         } else {
1468                 return $cgi->a({-href => $href, -class => "list subject"},
1469                        esc_html($long)  . $extra);
1470         }
1471 }
1472
1473 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1474 sub format_git_diff_header_line {
1475         my $line = shift;
1476         my $diffinfo = shift;
1477         my ($from, $to) = @_;
1478
1479         if ($diffinfo->{'nparents'}) {
1480                 # combined diff
1481                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1482                 if ($to->{'href'}) {
1483                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1484                                          esc_path($to->{'file'}));
1485                 } else { # file was deleted (no href)
1486                         $line .= esc_path($to->{'file'});
1487                 }
1488         } else {
1489                 # "ordinary" diff
1490                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1491                 if ($from->{'href'}) {
1492                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1493                                          'a/' . esc_path($from->{'file'}));
1494                 } else { # file was added (no href)
1495                         $line .= 'a/' . esc_path($from->{'file'});
1496                 }
1497                 $line .= ' ';
1498                 if ($to->{'href'}) {
1499                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1500                                          'b/' . esc_path($to->{'file'}));
1501                 } else { # file was deleted
1502                         $line .= 'b/' . esc_path($to->{'file'});
1503                 }
1504         }
1505
1506         return "<div class=\"diff header\">$line</div>\n";
1507 }
1508
1509 # format extended diff header line, before patch itself
1510 sub format_extended_diff_header_line {
1511         my $line = shift;
1512         my $diffinfo = shift;
1513         my ($from, $to) = @_;
1514
1515         # match <path>
1516         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1517                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1518                                        esc_path($from->{'file'}));
1519         }
1520         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1521                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1522                                  esc_path($to->{'file'}));
1523         }
1524         # match single <mode>
1525         if ($line =~ m/\s(\d{6})$/) {
1526                 $line .= '<span class="info"> (' .
1527                          file_type_long($1) .
1528                          ')</span>';
1529         }
1530         # match <hash>
1531         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1532                 # can match only for combined diff
1533                 $line = 'index ';
1534                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1535                         if ($from->{'href'}[$i]) {
1536                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1537                                                   -class=>"hash"},
1538                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1539                         } else {
1540                                 $line .= '0' x 7;
1541                         }
1542                         # separator
1543                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1544                 }
1545                 $line .= '..';
1546                 if ($to->{'href'}) {
1547                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1548                                          substr($diffinfo->{'to_id'},0,7));
1549                 } else {
1550                         $line .= '0' x 7;
1551                 }
1552
1553         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1554                 # can match only for ordinary diff
1555                 my ($from_link, $to_link);
1556                 if ($from->{'href'}) {
1557                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1558                                              substr($diffinfo->{'from_id'},0,7));
1559                 } else {
1560                         $from_link = '0' x 7;
1561                 }
1562                 if ($to->{'href'}) {
1563                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1564                                            substr($diffinfo->{'to_id'},0,7));
1565                 } else {
1566                         $to_link = '0' x 7;
1567                 }
1568                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1569                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1570         }
1571
1572         return $line . "<br/>\n";
1573 }
1574
1575 # format from-file/to-file diff header
1576 sub format_diff_from_to_header {
1577         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1578         my $line;
1579         my $result = '';
1580
1581         $line = $from_line;
1582         #assert($line =~ m/^---/) if DEBUG;
1583         # no extra formatting for "^--- /dev/null"
1584         if (! $diffinfo->{'nparents'}) {
1585                 # ordinary (single parent) diff
1586                 if ($line =~ m!^--- "?a/!) {
1587                         if ($from->{'href'}) {
1588                                 $line = '--- a/' .
1589                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1590                                                 esc_path($from->{'file'}));
1591                         } else {
1592                                 $line = '--- a/' .
1593                                         esc_path($from->{'file'});
1594                         }
1595                 }
1596                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1597
1598         } else {
1599                 # combined diff (merge commit)
1600                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1601                         if ($from->{'href'}[$i]) {
1602                                 $line = '--- ' .
1603                                         $cgi->a({-href=>href(action=>"blobdiff",
1604                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1605                                                              hash_parent_base=>$parents[$i],
1606                                                              file_parent=>$from->{'file'}[$i],
1607                                                              hash=>$diffinfo->{'to_id'},
1608                                                              hash_base=>$hash,
1609                                                              file_name=>$to->{'file'}),
1610                                                  -class=>"path",
1611                                                  -title=>"diff" . ($i+1)},
1612                                                 $i+1) .
1613                                         '/' .
1614                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1615                                                 esc_path($from->{'file'}[$i]));
1616                         } else {
1617                                 $line = '--- /dev/null';
1618                         }
1619                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1620                 }
1621         }
1622
1623         $line = $to_line;
1624         #assert($line =~ m/^\+\+\+/) if DEBUG;
1625         # no extra formatting for "^+++ /dev/null"
1626         if ($line =~ m!^\+\+\+ "?b/!) {
1627                 if ($to->{'href'}) {
1628                         $line = '+++ b/' .
1629                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1630                                         esc_path($to->{'file'}));
1631                 } else {
1632                         $line = '+++ b/' .
1633                                 esc_path($to->{'file'});
1634                 }
1635         }
1636         $result .= qq!<div class="diff to_file">$line</div>\n!;
1637
1638         return $result;
1639 }
1640
1641 # create note for patch simplified by combined diff
1642 sub format_diff_cc_simplified {
1643         my ($diffinfo, @parents) = @_;
1644         my $result = '';
1645
1646         $result .= "<div class=\"diff header\">" .
1647                    "diff --cc ";
1648         if (!is_deleted($diffinfo)) {
1649                 $result .= $cgi->a({-href => href(action=>"blob",
1650                                                   hash_base=>$hash,
1651                                                   hash=>$diffinfo->{'to_id'},
1652                                                   file_name=>$diffinfo->{'to_file'}),
1653                                     -class => "path"},
1654                                    esc_path($diffinfo->{'to_file'}));
1655         } else {
1656                 $result .= esc_path($diffinfo->{'to_file'});
1657         }
1658         $result .= "</div>\n" . # class="diff header"
1659                    "<div class=\"diff nodifferences\">" .
1660                    "Simple merge" .
1661                    "</div>\n"; # class="diff nodifferences"
1662
1663         return $result;
1664 }
1665
1666 # format patch (diff) line (not to be used for diff headers)
1667 sub format_diff_line {
1668         my $line = shift;
1669         my ($from, $to) = @_;
1670         my $diff_class = "";
1671
1672         chomp $line;
1673
1674         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1675                 # combined diff
1676                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1677                 if ($line =~ m/^\@{3}/) {
1678                         $diff_class = " chunk_header";
1679                 } elsif ($line =~ m/^\\/) {
1680                         $diff_class = " incomplete";
1681                 } elsif ($prefix =~ tr/+/+/) {
1682                         $diff_class = " add";
1683                 } elsif ($prefix =~ tr/-/-/) {
1684                         $diff_class = " rem";
1685                 }
1686         } else {
1687                 # assume ordinary diff
1688                 my $char = substr($line, 0, 1);
1689                 if ($char eq '+') {
1690                         $diff_class = " add";
1691                 } elsif ($char eq '-') {
1692                         $diff_class = " rem";
1693                 } elsif ($char eq '@') {
1694                         $diff_class = " chunk_header";
1695                 } elsif ($char eq "\\") {
1696                         $diff_class = " incomplete";
1697                 }
1698         }
1699         $line = untabify($line);
1700         if ($from && $to && $line =~ m/^\@{2} /) {
1701                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1702                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1703
1704                 $from_lines = 0 unless defined $from_lines;
1705                 $to_lines   = 0 unless defined $to_lines;
1706
1707                 if ($from->{'href'}) {
1708                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1709                                              -class=>"list"}, $from_text);
1710                 }
1711                 if ($to->{'href'}) {
1712                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1713                                              -class=>"list"}, $to_text);
1714                 }
1715                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1716                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1717                 return "<div class=\"diff$diff_class\">$line</div>\n";
1718         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1719                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1720                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1721
1722                 @from_text = split(' ', $ranges);
1723                 for (my $i = 0; $i < @from_text; ++$i) {
1724                         ($from_start[$i], $from_nlines[$i]) =
1725                                 (split(',', substr($from_text[$i], 1)), 0);
1726                 }
1727
1728                 $to_text   = pop @from_text;
1729                 $to_start  = pop @from_start;
1730                 $to_nlines = pop @from_nlines;
1731
1732                 $line = "<span class=\"chunk_info\">$prefix ";
1733                 for (my $i = 0; $i < @from_text; ++$i) {
1734                         if ($from->{'href'}[$i]) {
1735                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1736                                                   -class=>"list"}, $from_text[$i]);
1737                         } else {
1738                                 $line .= $from_text[$i];
1739                         }
1740                         $line .= " ";
1741                 }
1742                 if ($to->{'href'}) {
1743                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1744                                           -class=>"list"}, $to_text);
1745                 } else {
1746                         $line .= $to_text;
1747                 }
1748                 $line .= " $prefix</span>" .
1749                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1750                 return "<div class=\"diff$diff_class\">$line</div>\n";
1751         }
1752         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1753 }
1754
1755 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1756 # linked.  Pass the hash of the tree/commit to snapshot.
1757 sub format_snapshot_links {
1758         my ($hash) = @_;
1759         my $num_fmts = @snapshot_fmts;
1760         if ($num_fmts > 1) {
1761                 # A parenthesized list of links bearing format names.
1762                 # e.g. "snapshot (_tar.gz_ _zip_)"
1763                 return "snapshot (" . join(' ', map
1764                         $cgi->a({
1765                                 -href => href(
1766                                         action=>"snapshot",
1767                                         hash=>$hash,
1768                                         snapshot_format=>$_
1769                                 )
1770                         }, $known_snapshot_formats{$_}{'display'})
1771                 , @snapshot_fmts) . ")";
1772         } elsif ($num_fmts == 1) {
1773                 # A single "snapshot" link whose tooltip bears the format name.
1774                 # i.e. "_snapshot_"
1775                 my ($fmt) = @snapshot_fmts;
1776                 return
1777                         $cgi->a({
1778                                 -href => href(
1779                                         action=>"snapshot",
1780                                         hash=>$hash,
1781                                         snapshot_format=>$fmt
1782                                 ),
1783                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1784                         }, "snapshot");
1785         } else { # $num_fmts == 0
1786                 return undef;
1787         }
1788 }
1789
1790 ## ......................................................................
1791 ## functions returning values to be passed, perhaps after some
1792 ## transformation, to other functions; e.g. returning arguments to href()
1793
1794 # returns hash to be passed to href to generate gitweb URL
1795 # in -title key it returns description of link
1796 sub get_feed_info {
1797         my $format = shift || 'Atom';
1798         my %res = (action => lc($format));
1799
1800         # feed links are possible only for project views
1801         return unless (defined $project);
1802         # some views should link to OPML, or to generic project feed,
1803         # or don't have specific feed yet (so they should use generic)
1804         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1805
1806         my $branch;
1807         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1808         # from tag links; this also makes possible to detect branch links
1809         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1810             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1811                 $branch = $1;
1812         }
1813         # find log type for feed description (title)
1814         my $type = 'log';
1815         if (defined $file_name) {
1816                 $type  = "history of $file_name";
1817                 $type .= "/" if ($action eq 'tree');
1818                 $type .= " on '$branch'" if (defined $branch);
1819         } else {
1820                 $type = "log of $branch" if (defined $branch);
1821         }
1822
1823         $res{-title} = $type;
1824         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1825         $res{'file_name'} = $file_name;
1826
1827         return %res;
1828 }
1829
1830 ## ----------------------------------------------------------------------
1831 ## git utility subroutines, invoking git commands
1832
1833 # returns path to the core git executable and the --git-dir parameter as list
1834 sub git_cmd {
1835         return $GIT, '--git-dir='.$git_dir;
1836 }
1837
1838 # quote the given arguments for passing them to the shell
1839 # quote_command("command", "arg 1", "arg with ' and ! characters")
1840 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1841 # Try to avoid using this function wherever possible.
1842 sub quote_command {
1843         return join(' ',
1844                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1845 }
1846
1847 # get HEAD ref of given project as hash
1848 sub git_get_head_hash {
1849         my $project = shift;
1850         my $o_git_dir = $git_dir;
1851         my $retval = undef;
1852         $git_dir = "$projectroot/$project";
1853         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1854                 my $head = <$fd>;
1855                 close $fd;
1856                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1857                         $retval = $1;
1858                 }
1859         }
1860         if (defined $o_git_dir) {
1861                 $git_dir = $o_git_dir;
1862         }
1863         return $retval;
1864 }
1865
1866 # get type of given object
1867 sub git_get_type {
1868         my $hash = shift;
1869
1870         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1871         my $type = <$fd>;
1872         close $fd or return;
1873         chomp $type;
1874         return $type;
1875 }
1876
1877 # repository configuration
1878 our $config_file = '';
1879 our %config;
1880
1881 # store multiple values for single key as anonymous array reference
1882 # single values stored directly in the hash, not as [ <value> ]
1883 sub hash_set_multi {
1884         my ($hash, $key, $value) = @_;
1885
1886         if (!exists $hash->{$key}) {
1887                 $hash->{$key} = $value;
1888         } elsif (!ref $hash->{$key}) {
1889                 $hash->{$key} = [ $hash->{$key}, $value ];
1890         } else {
1891                 push @{$hash->{$key}}, $value;
1892         }
1893 }
1894
1895 # return hash of git project configuration
1896 # optionally limited to some section, e.g. 'gitweb'
1897 sub git_parse_project_config {
1898         my $section_regexp = shift;
1899         my %config;
1900
1901         local $/ = "\0";
1902
1903         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1904                 or return;
1905
1906         while (my $keyval = <$fh>) {
1907                 chomp $keyval;
1908                 my ($key, $value) = split(/\n/, $keyval, 2);
1909
1910                 hash_set_multi(\%config, $key, $value)
1911                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1912         }
1913         close $fh;
1914
1915         return %config;
1916 }
1917
1918 # convert config value to boolean, 'true' or 'false'
1919 # no value, number > 0, 'true' and 'yes' values are true
1920 # rest of values are treated as false (never as error)
1921 sub config_to_bool {
1922         my $val = shift;
1923
1924         # strip leading and trailing whitespace
1925         $val =~ s/^\s+//;
1926         $val =~ s/\s+$//;
1927
1928         return (!defined $val ||               # section.key
1929                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1930                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1931 }
1932
1933 # convert config value to simple decimal number
1934 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1935 # to be multiplied by 1024, 1048576, or 1073741824
1936 sub config_to_int {
1937         my $val = shift;
1938
1939         # strip leading and trailing whitespace
1940         $val =~ s/^\s+//;
1941         $val =~ s/\s+$//;
1942
1943         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1944                 $unit = lc($unit);
1945                 # unknown unit is treated as 1
1946                 return $num * ($unit eq 'g' ? 1073741824 :
1947                                $unit eq 'm' ?    1048576 :
1948                                $unit eq 'k' ?       1024 : 1);
1949         }
1950         return $val;
1951 }
1952
1953 # convert config value to array reference, if needed
1954 sub config_to_multi {
1955         my $val = shift;
1956
1957         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1958 }
1959
1960 sub git_get_project_config {
1961         my ($key, $type) = @_;
1962
1963         # key sanity check
1964         return unless ($key);
1965         $key =~ s/^gitweb\.//;
1966         return if ($key =~ m/\W/);
1967
1968         # type sanity check
1969         if (defined $type) {
1970                 $type =~ s/^--//;
1971                 $type = undef
1972                         unless ($type eq 'bool' || $type eq 'int');
1973         }
1974
1975         # get config
1976         if (!defined $config_file ||
1977             $config_file ne "$git_dir/config") {
1978                 %config = git_parse_project_config('gitweb');
1979                 $config_file = "$git_dir/config";
1980         }
1981
1982         # ensure given type
1983         if (!defined $type) {
1984                 return $config{"gitweb.$key"};
1985         } elsif ($type eq 'bool') {
1986                 # backward compatibility: 'git config --bool' returns true/false
1987                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1988         } elsif ($type eq 'int') {
1989                 return config_to_int($config{"gitweb.$key"});
1990         }
1991         return $config{"gitweb.$key"};
1992 }
1993
1994 # get hash of given path at given ref
1995 sub git_get_hash_by_path {
1996         my $base = shift;
1997         my $path = shift || return undef;
1998         my $type = shift;
1999
2000         $path =~ s,/+$,,;
2001
2002         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2003                 or die_error(500, "Open git-ls-tree failed");
2004         my $line = <$fd>;
2005         close $fd or return undef;
2006
2007         if (!defined $line) {
2008                 # there is no tree or hash given by $path at $base
2009                 return undef;
2010         }
2011
2012         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2013         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2014         if (defined $type && $type ne $2) {
2015                 # type doesn't match
2016                 return undef;
2017         }
2018         return $3;
2019 }
2020
2021 # get path of entry with given hash at given tree-ish (ref)
2022 # used to get 'from' filename for combined diff (merge commit) for renames
2023 sub git_get_path_by_hash {
2024         my $base = shift || return;
2025         my $hash = shift || return;
2026
2027         local $/ = "\0";
2028
2029         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2030                 or return undef;
2031         while (my $line = <$fd>) {
2032                 chomp $line;
2033
2034                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2035                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2036                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2037                         close $fd;
2038                         return $1;
2039                 }
2040         }
2041         close $fd;
2042         return undef;
2043 }
2044
2045 ## ......................................................................
2046 ## git utility functions, directly accessing git repository
2047
2048 sub git_get_project_description {
2049         my $path = shift;
2050
2051         $git_dir = "$projectroot/$path";
2052         open my $fd, "$git_dir/description"
2053                 or return git_get_project_config('description');
2054         my $descr = <$fd>;
2055         close $fd;
2056         if (defined $descr) {
2057                 chomp $descr;
2058         }
2059         return $descr;
2060 }
2061
2062 sub git_get_project_ctags {
2063         my $path = shift;
2064         my $ctags = {};
2065
2066         $git_dir = "$projectroot/$path";
2067         unless (opendir D, "$git_dir/ctags") {
2068                 return $ctags;
2069         }
2070         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2071                 open CT, $_ or next;
2072                 my $val = <CT>;
2073                 chomp $val;
2074                 close CT;
2075                 my $ctag = $_; $ctag =~ s#.*/##;
2076                 $ctags->{$ctag} = $val;
2077         }
2078         closedir D;
2079         $ctags;
2080 }
2081
2082 sub git_populate_project_tagcloud {
2083         my $ctags = shift;
2084
2085         # First, merge different-cased tags; tags vote on casing
2086         my %ctags_lc;
2087         foreach (keys %$ctags) {
2088                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2089                 if (not $ctags_lc{lc $_}->{topcount}
2090                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2091                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2092                         $ctags_lc{lc $_}->{topname} = $_;
2093                 }
2094         }
2095
2096         my $cloud;
2097         if (eval { require HTML::TagCloud; 1; }) {
2098                 $cloud = HTML::TagCloud->new;
2099                 foreach (sort keys %ctags_lc) {
2100                         # Pad the title with spaces so that the cloud looks
2101                         # less crammed.
2102                         my $title = $ctags_lc{$_}->{topname};
2103                         $title =~ s/ /&nbsp;/g;
2104                         $title =~ s/^/&nbsp;/g;
2105                         $title =~ s/$/&nbsp;/g;
2106                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2107                 }
2108         } else {
2109                 $cloud = \%ctags_lc;
2110         }
2111         $cloud;
2112 }
2113
2114 sub git_show_project_tagcloud {
2115         my ($cloud, $count) = @_;
2116         print STDERR ref($cloud)."..\n";
2117         if (ref $cloud eq 'HTML::TagCloud') {
2118                 return $cloud->html_and_css($count);
2119         } else {
2120                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2121                 return '<p align="center">' . join (', ', map {
2122                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2123                 } splice(@tags, 0, $count)) . '</p>';
2124         }
2125 }
2126
2127 sub git_get_project_url_list {
2128         my $path = shift;
2129
2130         $git_dir = "$projectroot/$path";
2131         open my $fd, "$git_dir/cloneurl"
2132                 or return wantarray ?
2133                 @{ config_to_multi(git_get_project_config('url')) } :
2134                    config_to_multi(git_get_project_config('url'));
2135         my @git_project_url_list = map { chomp; $_ } <$fd>;
2136         close $fd;
2137
2138         return wantarray ? @git_project_url_list : \@git_project_url_list;
2139 }
2140
2141 sub git_get_projects_list {
2142         my ($filter) = @_;
2143         my @list;
2144
2145         $filter ||= '';
2146         $filter =~ s/\.git$//;
2147
2148         my $check_forks = gitweb_check_feature('forks');
2149
2150         if (-d $projects_list) {
2151                 # search in directory
2152                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2153                 # remove the trailing "/"
2154                 $dir =~ s!/+$!!;
2155                 my $pfxlen = length("$dir");
2156                 my $pfxdepth = ($dir =~ tr!/!!);
2157
2158                 File::Find::find({
2159                         follow_fast => 1, # follow symbolic links
2160                         follow_skip => 2, # ignore duplicates
2161                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2162                         wanted => sub {
2163                                 # skip project-list toplevel, if we get it.
2164                                 return if (m!^[/.]$!);
2165                                 # only directories can be git repositories
2166                                 return unless (-d $_);
2167                                 # don't traverse too deep (Find is super slow on os x)
2168                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2169                                         $File::Find::prune = 1;
2170                                         return;
2171                                 }
2172
2173                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2174                                 # we check related file in $projectroot
2175                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2176                                 if (check_export_ok("$projectroot/$path")) {
2177                                         push @list, { path => $path };
2178                                         $File::Find::prune = 1;
2179                                 }
2180                         },
2181                 }, "$dir");
2182
2183         } elsif (-f $projects_list) {
2184                 # read from file(url-encoded):
2185                 # 'git%2Fgit.git Linus+Torvalds'
2186                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2187                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2188                 my %paths;
2189                 open my ($fd), $projects_list or return;
2190         PROJECT:
2191                 while (my $line = <$fd>) {
2192                         chomp $line;
2193                         my ($path, $owner) = split ' ', $line;
2194                         $path = unescape($path);
2195                         $owner = unescape($owner);
2196                         if (!defined $path) {
2197                                 next;
2198                         }
2199                         if ($filter ne '') {
2200                                 # looking for forks;
2201                                 my $pfx = substr($path, 0, length($filter));
2202                                 if ($pfx ne $filter) {
2203                                         next PROJECT;
2204                                 }
2205                                 my $sfx = substr($path, length($filter));
2206                                 if ($sfx !~ /^\/.*\.git$/) {
2207                                         next PROJECT;
2208                                 }
2209                         } elsif ($check_forks) {
2210                         PATH:
2211                                 foreach my $filter (keys %paths) {
2212                                         # looking for forks;
2213                                         my $pfx = substr($path, 0, length($filter));
2214                                         if ($pfx ne $filter) {
2215                                                 next PATH;
2216                                         }
2217                                         my $sfx = substr($path, length($filter));
2218                                         if ($sfx !~ /^\/.*\.git$/) {
2219                                                 next PATH;
2220                                         }
2221                                         # is a fork, don't include it in
2222                                         # the list
2223                                         next PROJECT;
2224                                 }
2225                         }
2226                         if (check_export_ok("$projectroot/$path")) {
2227                                 my $pr = {
2228                                         path => $path,
2229                                         owner => to_utf8($owner),
2230                                 };
2231                                 push @list, $pr;
2232                                 (my $forks_path = $path) =~ s/\.git$//;
2233                                 $paths{$forks_path}++;
2234                         }
2235                 }
2236                 close $fd;
2237         }
2238         return @list;
2239 }
2240
2241 our $gitweb_project_owner = undef;
2242 sub git_get_project_list_from_file {
2243
2244         return if (defined $gitweb_project_owner);
2245
2246         $gitweb_project_owner = {};
2247         # read from file (url-encoded):
2248         # 'git%2Fgit.git Linus+Torvalds'
2249         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2250         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2251         if (-f $projects_list) {
2252                 open (my $fd , $projects_list);
2253                 while (my $line = <$fd>) {
2254                         chomp $line;
2255                         my ($pr, $ow) = split ' ', $line;
2256                         $pr = unescape($pr);
2257                         $ow = unescape($ow);
2258                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2259                 }
2260                 close $fd;
2261         }
2262 }
2263
2264 sub git_get_project_owner {
2265         my $project = shift;
2266         my $owner;
2267
2268         return undef unless $project;
2269         $git_dir = "$projectroot/$project";
2270
2271         if (!defined $gitweb_project_owner) {
2272                 git_get_project_list_from_file();
2273         }
2274
2275         if (exists $gitweb_project_owner->{$project}) {
2276                 $owner = $gitweb_project_owner->{$project};
2277         }
2278         if (!defined $owner){
2279                 $owner = git_get_project_config('owner');
2280         }
2281         if (!defined $owner) {
2282                 $owner = get_file_owner("$git_dir");
2283         }
2284
2285         return $owner;
2286 }
2287
2288 sub git_get_last_activity {
2289         my ($path) = @_;
2290         my $fd;
2291
2292         $git_dir = "$projectroot/$path";
2293         open($fd, "-|", git_cmd(), 'for-each-ref',
2294              '--format=%(committer)',
2295              '--sort=-committerdate',
2296              '--count=1',
2297              'refs/heads') or return;
2298         my $most_recent = <$fd>;
2299         close $fd or return;
2300         if (defined $most_recent &&
2301             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2302                 my $timestamp = $1;
2303                 my $age = time - $timestamp;
2304                 return ($age, age_string($age));
2305         }
2306         return (undef, undef);
2307 }
2308
2309 sub git_get_references {
2310         my $type = shift || "";
2311         my %refs;
2312         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2313         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2314         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2315                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2316                 or return;
2317
2318         while (my $line = <$fd>) {
2319                 chomp $line;
2320                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2321                         if (defined $refs{$1}) {
2322                                 push @{$refs{$1}}, $2;
2323                         } else {
2324                                 $refs{$1} = [ $2 ];
2325                         }
2326                 }
2327         }
2328         close $fd or return;
2329         return \%refs;
2330 }
2331
2332 sub git_get_rev_name_tags {
2333         my $hash = shift || return undef;
2334
2335         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2336                 or return;
2337         my $name_rev = <$fd>;
2338         close $fd;
2339
2340         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2341                 return $1;
2342         } else {
2343                 # catches also '$hash undefined' output
2344                 return undef;
2345         }
2346 }
2347
2348 ## ----------------------------------------------------------------------
2349 ## parse to hash functions
2350
2351 sub parse_date {
2352         my $epoch = shift;
2353         my $tz = shift || "-0000";
2354
2355         my %date;
2356         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2357         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2358         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2359         $date{'hour'} = $hour;
2360         $date{'minute'} = $min;
2361         $date{'mday'} = $mday;
2362         $date{'day'} = $days[$wday];
2363         $date{'month'} = $months[$mon];
2364         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2365                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2366         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2367                              $mday, $months[$mon], $hour ,$min;
2368         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2369                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2370
2371         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2372         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2373         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2374         $date{'hour_local'} = $hour;
2375         $date{'minute_local'} = $min;
2376         $date{'tz_local'} = $tz;
2377         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2378                                   1900+$year, $mon+1, $mday,
2379                                   $hour, $min, $sec, $tz);
2380         return %date;
2381 }
2382
2383 sub parse_tag {
2384         my $tag_id = shift;
2385         my %tag;
2386         my @comment;
2387
2388         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2389         $tag{'id'} = $tag_id;
2390         while (my $line = <$fd>) {
2391                 chomp $line;
2392                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2393                         $tag{'object'} = $1;
2394                 } elsif ($line =~ m/^type (.+)$/) {
2395                         $tag{'type'} = $1;
2396                 } elsif ($line =~ m/^tag (.+)$/) {
2397                         $tag{'name'} = $1;
2398                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2399                         $tag{'author'} = $1;
2400                         $tag{'epoch'} = $2;
2401                         $tag{'tz'} = $3;
2402                 } elsif ($line =~ m/--BEGIN/) {
2403                         push @comment, $line;
2404                         last;
2405                 } elsif ($line eq "") {
2406                         last;
2407                 }
2408         }
2409         push @comment, <$fd>;
2410         $tag{'comment'} = \@comment;
2411         close $fd or return;
2412         if (!defined $tag{'name'}) {
2413                 return
2414         };
2415         return %tag
2416 }
2417
2418 sub parse_commit_text {
2419         my ($commit_text, $withparents) = @_;
2420         my @commit_lines = split '\n', $commit_text;
2421         my %co;
2422
2423         pop @commit_lines; # Remove '\0'
2424
2425         if (! @commit_lines) {
2426                 return;
2427         }
2428
2429         my $header = shift @commit_lines;
2430         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2431                 return;
2432         }
2433         ($co{'id'}, my @parents) = split ' ', $header;
2434         while (my $line = shift @commit_lines) {
2435                 last if $line eq "\n";
2436                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2437                         $co{'tree'} = $1;
2438                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2439                         push @parents, $1;
2440                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2441                         $co{'author'} = $1;
2442                         $co{'author_epoch'} = $2;
2443                         $co{'author_tz'} = $3;
2444                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2445                                 $co{'author_name'}  = $1;
2446                                 $co{'author_email'} = $2;
2447                         } else {
2448                                 $co{'author_name'} = $co{'author'};
2449                         }
2450                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2451                         $co{'committer'} = $1;
2452                         $co{'committer_epoch'} = $2;
2453                         $co{'committer_tz'} = $3;
2454                         $co{'committer_name'} = $co{'committer'};
2455                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2456                                 $co{'committer_name'}  = $1;
2457                                 $co{'committer_email'} = $2;
2458                         } else {
2459                                 $co{'committer_name'} = $co{'committer'};
2460                         }
2461                 }
2462         }
2463         if (!defined $co{'tree'}) {
2464                 return;
2465         };
2466         $co{'parents'} = \@parents;
2467         $co{'parent'} = $parents[0];
2468
2469         foreach my $title (@commit_lines) {
2470                 $title =~ s/^    //;
2471                 if ($title ne "") {
2472                         $co{'title'} = chop_str($title, 80, 5);
2473                         # remove leading stuff of merges to make the interesting part visible
2474                         if (length($title) > 50) {
2475                                 $title =~ s/^Automatic //;
2476                                 $title =~ s/^merge (of|with) /Merge ... /i;
2477                                 if (length($title) > 50) {
2478                                         $title =~ s/(http|rsync):\/\///;
2479                                 }
2480                                 if (length($title) > 50) {
2481                                         $title =~ s/(master|www|rsync)\.//;
2482                                 }
2483                                 if (length($title) > 50) {
2484                                         $title =~ s/kernel.org:?//;
2485                                 }
2486                                 if (length($title) > 50) {
2487                                         $title =~ s/\/pub\/scm//;
2488                                 }
2489                         }
2490                         $co{'title_short'} = chop_str($title, 50, 5);
2491                         last;
2492                 }
2493         }
2494         if (! defined $co{'title'} || $co{'title'} eq "") {
2495                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2496         }
2497         # remove added spaces
2498         foreach my $line (@commit_lines) {
2499                 $line =~ s/^    //;
2500         }
2501         $co{'comment'} = \@commit_lines;
2502
2503         my $age = time - $co{'committer_epoch'};
2504         $co{'age'} = $age;
2505         $co{'age_string'} = age_string($age);
2506         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2507         if ($age > 60*60*24*7*2) {
2508                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2509                 $co{'age_string_age'} = $co{'age_string'};
2510         } else {
2511                 $co{'age_string_date'} = $co{'age_string'};
2512                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2513         }
2514         return %co;
2515 }
2516
2517 sub parse_commit {
2518         my ($commit_id) = @_;
2519         my %co;
2520
2521         local $/ = "\0";
2522
2523         open my $fd, "-|", git_cmd(), "rev-list",
2524                 "--parents",
2525                 "--header",
2526                 "--max-count=1",
2527                 $commit_id,
2528                 "--",
2529                 or die_error(500, "Open git-rev-list failed");
2530         %co = parse_commit_text(<$fd>, 1);
2531         close $fd;
2532
2533         return %co;
2534 }
2535
2536 sub parse_commits {
2537         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2538         my @cos;
2539
2540         $maxcount ||= 1;
2541         $skip ||= 0;
2542
2543         local $/ = "\0";
2544
2545         open my $fd, "-|", git_cmd(), "rev-list",
2546                 "--header",
2547                 @args,
2548                 ("--max-count=" . $maxcount),
2549                 ("--skip=" . $skip),
2550                 @extra_options,
2551                 $commit_id,
2552                 "--",
2553                 ($filename ? ($filename) : ())
2554                 or die_error(500, "Open git-rev-list failed");
2555         while (my $line = <$fd>) {
2556                 my %co = parse_commit_text($line);
2557                 push @cos, \%co;
2558         }
2559         close $fd;
2560
2561         return wantarray ? @cos : \@cos;
2562 }
2563
2564 # parse line of git-diff-tree "raw" output
2565 sub parse_difftree_raw_line {
2566         my $line = shift;
2567         my %res;
2568
2569         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2570         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2571         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2572                 $res{'from_mode'} = $1;
2573                 $res{'to_mode'} = $2;
2574                 $res{'from_id'} = $3;
2575                 $res{'to_id'} = $4;
2576                 $res{'status'} = $5;
2577                 $res{'similarity'} = $6;
2578                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2579                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2580                 } else {
2581                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2582                 }
2583         }
2584         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2585         # combined diff (for merge commit)
2586         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2587                 $res{'nparents'}  = length($1);
2588                 $res{'from_mode'} = [ split(' ', $2) ];
2589                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2590                 $res{'from_id'} = [ split(' ', $3) ];
2591                 $res{'to_id'} = pop @{$res{'from_id'}};
2592                 $res{'status'} = [ split('', $4) ];
2593                 $res{'to_file'} = unquote($5);
2594         }
2595         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2596         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2597                 $res{'commit'} = $1;
2598         }
2599
2600         return wantarray ? %res : \%res;
2601 }
2602
2603 # wrapper: return parsed line of git-diff-tree "raw" output
2604 # (the argument might be raw line, or parsed info)
2605 sub parsed_difftree_line {
2606         my $line_or_ref = shift;
2607
2608         if (ref($line_or_ref) eq "HASH") {
2609                 # pre-parsed (or generated by hand)
2610                 return $line_or_ref;
2611         } else {
2612                 return parse_difftree_raw_line($line_or_ref);
2613         }
2614 }
2615
2616 # parse line of git-ls-tree output
2617 sub parse_ls_tree_line ($;%) {
2618         my $line = shift;
2619         my %opts = @_;
2620         my %res;
2621
2622         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2623         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2624
2625         $res{'mode'} = $1;
2626         $res{'type'} = $2;
2627         $res{'hash'} = $3;
2628         if ($opts{'-z'}) {
2629                 $res{'name'} = $4;
2630         } else {
2631                 $res{'name'} = unquote($4);
2632         }
2633
2634         return wantarray ? %res : \%res;
2635 }
2636
2637 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2638 sub parse_from_to_diffinfo {
2639         my ($diffinfo, $from, $to, @parents) = @_;
2640
2641         if ($diffinfo->{'nparents'}) {
2642                 # combined diff
2643                 $from->{'file'} = [];
2644                 $from->{'href'} = [];
2645                 fill_from_file_info($diffinfo, @parents)
2646                         unless exists $diffinfo->{'from_file'};
2647                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2648                         $from->{'file'}[$i] =
2649                                 defined $diffinfo->{'from_file'}[$i] ?
2650                                         $diffinfo->{'from_file'}[$i] :
2651                                         $diffinfo->{'to_file'};
2652                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2653                                 $from->{'href'}[$i] = href(action=>"blob",
2654                                                            hash_base=>$parents[$i],
2655                                                            hash=>$diffinfo->{'from_id'}[$i],
2656                                                            file_name=>$from->{'file'}[$i]);
2657                         } else {
2658                                 $from->{'href'}[$i] = undef;
2659                         }
2660                 }
2661         } else {
2662                 # ordinary (not combined) diff
2663                 $from->{'file'} = $diffinfo->{'from_file'};
2664                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2665                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2666                                                hash=>$diffinfo->{'from_id'},
2667                                                file_name=>$from->{'file'});
2668                 } else {
2669                         delete $from->{'href'};
2670                 }
2671         }
2672
2673         $to->{'file'} = $diffinfo->{'to_file'};
2674         if (!is_deleted($diffinfo)) { # file exists in result
2675                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2676                                      hash=>$diffinfo->{'to_id'},
2677                                      file_name=>$to->{'file'});
2678         } else {
2679                 delete $to->{'href'};
2680         }
2681 }
2682
2683 ## ......................................................................
2684 ## parse to array of hashes functions
2685
2686 sub git_get_heads_list {
2687         my $limit = shift;
2688         my @headslist;
2689
2690         open my $fd, '-|', git_cmd(), 'for-each-ref',
2691                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2692                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2693                 'refs/heads'
2694                 or return;
2695         while (my $line = <$fd>) {
2696                 my %ref_item;
2697
2698                 chomp $line;
2699                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2700                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2701                 my ($committer, $epoch, $tz) =
2702                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2703                 $ref_item{'fullname'}  = $name;
2704                 $name =~ s!^refs/heads/!!;
2705
2706                 $ref_item{'name'}  = $name;
2707                 $ref_item{'id'}    = $hash;
2708                 $ref_item{'title'} = $title || '(no commit message)';
2709                 $ref_item{'epoch'} = $epoch;
2710                 if ($epoch) {
2711                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2712                 } else {
2713                         $ref_item{'age'} = "unknown";
2714                 }
2715
2716                 push @headslist, \%ref_item;
2717         }
2718         close $fd;
2719
2720         return wantarray ? @headslist : \@headslist;
2721 }
2722
2723 sub git_get_tags_list {
2724         my $limit = shift;
2725         my @tagslist;
2726
2727         open my $fd, '-|', git_cmd(), 'for-each-ref',
2728                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2729                 '--format=%(objectname) %(objecttype) %(refname) '.
2730                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2731                 'refs/tags'
2732                 or return;
2733         while (my $line = <$fd>) {
2734                 my %ref_item;
2735
2736                 chomp $line;
2737                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2738                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2739                 my ($creator, $epoch, $tz) =
2740                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2741                 $ref_item{'fullname'} = $name;
2742                 $name =~ s!^refs/tags/!!;
2743
2744                 $ref_item{'type'} = $type;
2745                 $ref_item{'id'} = $id;
2746                 $ref_item{'name'} = $name;
2747                 if ($type eq "tag") {
2748                         $ref_item{'subject'} = $title;
2749                         $ref_item{'reftype'} = $reftype;
2750                         $ref_item{'refid'}   = $refid;
2751                 } else {
2752                         $ref_item{'reftype'} = $type;
2753                         $ref_item{'refid'}   = $id;
2754                 }
2755
2756                 if ($type eq "tag" || $type eq "commit") {
2757                         $ref_item{'epoch'} = $epoch;
2758                         if ($epoch) {
2759                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2760                         } else {
2761                                 $ref_item{'age'} = "unknown";
2762                         }
2763                 }
2764
2765                 push @tagslist, \%ref_item;
2766         }
2767         close $fd;
2768
2769         return wantarray ? @tagslist : \@tagslist;
2770 }
2771
2772 ## ----------------------------------------------------------------------
2773 ## filesystem-related functions
2774
2775 sub get_file_owner {
2776         my $path = shift;
2777
2778         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2779         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2780         if (!defined $gcos) {
2781                 return undef;
2782         }
2783         my $owner = $gcos;
2784         $owner =~ s/[,;].*$//;
2785         return to_utf8($owner);
2786 }
2787
2788 # assume that file exists
2789 sub insert_file {
2790         my $filename = shift;
2791
2792         open my $fd, '<', $filename;
2793         print map { to_utf8($_) } <$fd>;
2794         close $fd;
2795 }
2796
2797 ## ......................................................................
2798 ## mimetype related functions
2799
2800 sub mimetype_guess_file {
2801         my $filename = shift;
2802         my $mimemap = shift;
2803         -r $mimemap or return undef;
2804
2805         my %mimemap;
2806         open(MIME, $mimemap) or return undef;
2807         while (<MIME>) {
2808                 next if m/^#/; # skip comments
2809                 my ($mime, $exts) = split(/\t+/);
2810                 if (defined $exts) {
2811                         my @exts = split(/\s+/, $exts);
2812                         foreach my $ext (@exts) {
2813                                 $mimemap{$ext} = $mime;
2814                         }
2815                 }
2816         }
2817         close(MIME);
2818
2819         $filename =~ /\.([^.]*)$/;
2820         return $mimemap{$1};
2821 }
2822
2823 sub mimetype_guess {
2824         my $filename = shift;
2825         my $mime;
2826         $filename =~ /\./ or return undef;
2827
2828         if ($mimetypes_file) {
2829                 my $file = $mimetypes_file;
2830                 if ($file !~ m!^/!) { # if it is relative path
2831                         # it is relative to project
2832                         $file = "$projectroot/$project/$file";
2833                 }
2834                 $mime = mimetype_guess_file($filename, $file);
2835         }
2836         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2837         return $mime;
2838 }
2839
2840 sub blob_mimetype {
2841         my $fd = shift;
2842         my $filename = shift;
2843
2844         if ($filename) {
2845                 my $mime = mimetype_guess($filename);
2846                 $mime and return $mime;
2847         }
2848
2849         # just in case
2850         return $default_blob_plain_mimetype unless $fd;
2851
2852         if (-T $fd) {
2853                 return 'text/plain';
2854         } elsif (! $filename) {
2855                 return 'application/octet-stream';
2856         } elsif ($filename =~ m/\.png$/i) {
2857                 return 'image/png';
2858         } elsif ($filename =~ m/\.gif$/i) {
2859                 return 'image/gif';
2860         } elsif ($filename =~ m/\.jpe?g$/i) {
2861                 return 'image/jpeg';
2862         } else {
2863                 return 'application/octet-stream';
2864         }
2865 }
2866
2867 sub blob_contenttype {
2868         my ($fd, $file_name, $type) = @_;
2869
2870         $type ||= blob_mimetype($fd, $file_name);
2871         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2872                 $type .= "; charset=$default_text_plain_charset";
2873         }
2874
2875         return $type;
2876 }
2877
2878 ## ======================================================================
2879 ## functions printing HTML: header, footer, error page
2880
2881 sub git_header_html {
2882         my $status = shift || "200 OK";
2883         my $expires = shift;
2884
2885         my $title = "$site_name";
2886         if (defined $project) {
2887                 $title .= " - " . to_utf8($project);
2888                 if (defined $action) {
2889                         $title .= "/$action";
2890                         if (defined $file_name) {
2891                                 $title .= " - " . esc_path($file_name);
2892                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2893                                         $title .= "/";
2894                                 }
2895                         }
2896                 }
2897         }
2898         my $content_type;
2899         # require explicit support from the UA if we are to send the page as
2900         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2901         # we have to do this because MSIE sometimes globs '*/*', pretending to
2902         # support xhtml+xml but choking when it gets what it asked for.
2903         if (defined $cgi->http('HTTP_ACCEPT') &&
2904             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2905             $cgi->Accept('application/xhtml+xml') != 0) {
2906                 $content_type = 'application/xhtml+xml';
2907         } else {
2908                 $content_type = 'text/html';
2909         }
2910         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2911                            -status=> $status, -expires => $expires);
2912         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2913         print <<EOF;
2914 <?xml version="1.0" encoding="utf-8"?>
2915 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2916 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2917 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2918 <!-- git core binaries version $git_version -->
2919 <head>
2920 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2921 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2922 <meta name="robots" content="index, nofollow"/>
2923 <title>$title</title>
2924 EOF
2925         # the stylesheet, favicon etc urls won't work correctly with path_info
2926         # unless we set the appropriate base URL
2927         if ($ENV{'PATH_INFO'}) {
2928                 print "<base href=\"".esc_url($base_url)."\" />\n";
2929         }
2930         # print out each stylesheet that exist, providing backwards capability
2931         # for those people who defined $stylesheet in a config file
2932         if (defined $stylesheet) {
2933                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2934         } else {
2935                 foreach my $stylesheet (@stylesheets) {
2936                         next unless $stylesheet;
2937                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2938                 }
2939         }
2940         if (defined $project) {
2941                 my %href_params = get_feed_info();
2942                 if (!exists $href_params{'-title'}) {
2943                         $href_params{'-title'} = 'log';
2944                 }
2945
2946                 foreach my $format qw(RSS Atom) {
2947                         my $type = lc($format);
2948                         my %link_attr = (
2949                                 '-rel' => 'alternate',
2950                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2951                                 '-type' => "application/$type+xml"
2952                         );
2953
2954                         $href_params{'action'} = $type;
2955                         $link_attr{'-href'} = href(%href_params);
2956                         print "<link ".
2957                               "rel=\"$link_attr{'-rel'}\" ".
2958                               "title=\"$link_attr{'-title'}\" ".
2959                               "href=\"$link_attr{'-href'}\" ".
2960                               "type=\"$link_attr{'-type'}\" ".
2961                               "/>\n";
2962
2963                         $href_params{'extra_options'} = '--no-merges';
2964                         $link_attr{'-href'} = href(%href_params);
2965                         $link_attr{'-title'} .= ' (no merges)';
2966                         print "<link ".
2967                               "rel=\"$link_attr{'-rel'}\" ".
2968                               "title=\"$link_attr{'-title'}\" ".
2969                               "href=\"$link_attr{'-href'}\" ".
2970                               "type=\"$link_attr{'-type'}\" ".
2971                               "/>\n";
2972                 }
2973
2974         } else {
2975                 printf('<link rel="alternate" title="%s projects list" '.
2976                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2977                        $site_name, href(project=>undef, action=>"project_index"));
2978                 printf('<link rel="alternate" title="%s projects feeds" '.
2979                        'href="%s" type="text/x-opml" />'."\n",
2980                        $site_name, href(project=>undef, action=>"opml"));
2981         }
2982         if (defined $favicon) {
2983                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2984         }
2985
2986         print "</head>\n" .
2987               "<body>\n";
2988
2989         if (-f $site_header) {
2990                 insert_file($site_header);
2991         }
2992
2993         print "<div class=\"page_header\">\n" .
2994               $cgi->a({-href => esc_url($logo_url),
2995                        -title => $logo_label},
2996                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2997         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2998         if (defined $project) {
2999                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3000                 if (defined $action) {
3001                         print " / $action";
3002                 }
3003                 print "\n";
3004         }
3005         print "</div>\n";
3006
3007         my $have_search = gitweb_check_feature('search');
3008         if (defined $project && $have_search) {
3009                 if (!defined $searchtext) {
3010                         $searchtext = "";
3011                 }
3012                 my $search_hash;
3013                 if (defined $hash_base) {
3014                         $search_hash = $hash_base;
3015                 } elsif (defined $hash) {
3016                         $search_hash = $hash;
3017                 } else {
3018                         $search_hash = "HEAD";
3019                 }
3020                 my $action = $my_uri;
3021                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3022                 if ($use_pathinfo) {
3023                         $action .= "/".esc_url($project);
3024                 }
3025                 print $cgi->startform(-method => "get", -action => $action) .
3026                       "<div class=\"search\">\n" .
3027                       (!$use_pathinfo &&
3028                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3029                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3030                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3031                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3032                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3033                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3034                       " search:\n",
3035                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3036                       "<span title=\"Extended regular expression\">" .
3037                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3038                                      -checked => $search_use_regexp) .
3039                       "</span>" .
3040                       "</div>" .
3041                       $cgi->end_form() . "\n";
3042         }
3043 }
3044
3045 sub git_footer_html {
3046         my $feed_class = 'rss_logo';
3047
3048         print "<div class=\"page_footer\">\n";
3049         if (defined $project) {
3050                 my $descr = git_get_project_description($project);
3051                 if (defined $descr) {
3052                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3053                 }
3054
3055                 my %href_params = get_feed_info();
3056                 if (!%href_params) {
3057                         $feed_class .= ' generic';
3058                 }
3059                 $href_params{'-title'} ||= 'log';
3060
3061                 foreach my $format qw(RSS Atom) {
3062                         $href_params{'action'} = lc($format);
3063                         print $cgi->a({-href => href(%href_params),
3064                                       -title => "$href_params{'-title'} $format feed",
3065                                       -class => $feed_class}, $format)."\n";
3066                 }
3067
3068         } else {
3069                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3070                               -class => $feed_class}, "OPML") . " ";
3071                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3072                               -class => $feed_class}, "TXT") . "\n";
3073         }
3074         print "</div>\n"; # class="page_footer"
3075
3076         if (-f $site_footer) {
3077                 insert_file($site_footer);
3078         }
3079
3080         print "</body>\n" .
3081               "</html>";
3082 }
3083
3084 # die_error(<http_status_code>, <error_message>)
3085 # Example: die_error(404, 'Hash not found')
3086 # By convention, use the following status codes (as defined in RFC 2616):
3087 # 400: Invalid or missing CGI parameters, or
3088 #      requested object exists but has wrong type.
3089 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3090 #      this server or project.
3091 # 404: Requested object/revision/project doesn't exist.
3092 # 500: The server isn't configured properly, or
3093 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3094 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3095 sub die_error {
3096         my $status = shift || 500;
3097         my $error = shift || "Internal server error";
3098
3099         my %http_responses = (400 => '400 Bad Request',
3100                               403 => '403 Forbidden',
3101                               404 => '404 Not Found',
3102                               500 => '500 Internal Server Error');
3103         git_header_html($http_responses{$status});
3104         print <<EOF;
3105 <div class="page_body">
3106 <br /><br />
3107 $status - $error
3108 <br />
3109 </div>
3110 EOF
3111         git_footer_html();
3112         exit;
3113 }
3114
3115 ## ----------------------------------------------------------------------
3116 ## functions printing or outputting HTML: navigation
3117
3118 sub git_print_page_nav {
3119         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3120         $extra = '' if !defined $extra; # pager or formats
3121
3122         my @navs = qw(summary shortlog log commit commitdiff tree);
3123         if ($suppress) {
3124                 @navs = grep { $_ ne $suppress } @navs;
3125         }
3126
3127         my %arg = map { $_ => {action=>$_} } @navs;
3128         if (defined $head) {
3129                 for (qw(commit commitdiff)) {
3130                         $arg{$_}{'hash'} = $head;
3131                 }
3132                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3133                         for (qw(shortlog log)) {
3134                                 $arg{$_}{'hash'} = $head;
3135                         }
3136                 }
3137         }
3138
3139         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3140         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3141
3142         my @actions = gitweb_get_feature('actions');
3143         my %repl = (
3144                 '%' => '%',
3145                 'n' => $project,         # project name
3146                 'f' => $git_dir,         # project path within filesystem
3147                 'h' => $treehead || '',  # current hash ('h' parameter)
3148                 'b' => $treebase || '',  # hash base ('hb' parameter)
3149         );
3150         while (@actions) {
3151                 my ($label, $link, $pos) = splice(@actions,0,3);
3152                 # insert
3153                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3154                 # munch munch
3155                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3156                 $arg{$label}{'_href'} = $link;
3157         }
3158
3159         print "<div class=\"page_nav\">\n" .
3160                 (join " | ",
3161                  map { $_ eq $current ?
3162                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3163                  } @navs);
3164         print "<br/>\n$extra<br/>\n" .
3165               "</div>\n";
3166 }
3167
3168 sub format_paging_nav {
3169         my ($action, $hash, $head, $page, $has_next_link) = @_;
3170         my $paging_nav;
3171
3172
3173         if ($hash ne $head || $page) {
3174                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3175         } else {
3176                 $paging_nav .= "HEAD";
3177         }
3178
3179         if ($page > 0) {
3180                 $paging_nav .= " &sdot; " .
3181                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3182                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3183         } else {
3184                 $paging_nav .= " &sdot; prev";
3185         }
3186
3187         if ($has_next_link) {
3188                 $paging_nav .= " &sdot; " .
3189                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3190                                  -accesskey => "n", -title => "Alt-n"}, "next");
3191         } else {
3192                 $paging_nav .= " &sdot; next";
3193         }
3194
3195         return $paging_nav;
3196 }
3197
3198 ## ......................................................................
3199 ## functions printing or outputting HTML: div
3200
3201 sub git_print_header_div {
3202         my ($action, $title, $hash, $hash_base) = @_;
3203         my %args = ();
3204
3205         $args{'action'} = $action;
3206         $args{'hash'} = $hash if $hash;
3207         $args{'hash_base'} = $hash_base if $hash_base;
3208
3209         print "<div class=\"header\">\n" .
3210               $cgi->a({-href => href(%args), -class => "title"},
3211               $title ? $title : $action) .
3212               "\n</div>\n";
3213 }
3214
3215 #sub git_print_authorship (\%) {
3216 sub git_print_authorship {
3217         my $co = shift;
3218
3219         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3220         print "<div class=\"author_date\">" .
3221               esc_html($co->{'author_name'}) .
3222               " [$ad{'rfc2822'}";
3223         if ($ad{'hour_local'} < 6) {
3224                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3225                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3226         } else {
3227                 printf(" (%02d:%02d %s)",
3228                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3229         }
3230         print "]</div>\n";
3231 }
3232
3233 sub git_print_page_path {
3234         my $name = shift;
3235         my $type = shift;
3236         my $hb = shift;
3237
3238
3239         print "<div class=\"page_path\">";
3240         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3241                       -title => 'tree root'}, to_utf8("[$project]"));
3242         print " / ";
3243         if (defined $name) {
3244                 my @dirname = split '/', $name;
3245                 my $basename = pop @dirname;
3246                 my $fullname = '';
3247
3248                 foreach my $dir (@dirname) {
3249                         $fullname .= ($fullname ? '/' : '') . $dir;
3250                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3251                                                      hash_base=>$hb),
3252                                       -title => $fullname}, esc_path($dir));
3253                         print " / ";
3254                 }
3255                 if (defined $type && $type eq 'blob') {
3256                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3257                                                      hash_base=>$hb),
3258                                       -title => $name}, esc_path($basename));
3259                 } elsif (defined $type && $type eq 'tree') {
3260                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3261                                                      hash_base=>$hb),
3262                                       -title => $name}, esc_path($basename));
3263                         print " / ";
3264                 } else {
3265                         print esc_path($basename);
3266                 }
3267         }
3268         print "<br/></div>\n";
3269 }
3270
3271 # sub git_print_log (\@;%) {
3272 sub git_print_log ($;%) {
3273         my $log = shift;
3274         my %opts = @_;
3275
3276         if ($opts{'-remove_title'}) {
3277                 # remove title, i.e. first line of log
3278                 shift @$log;
3279         }
3280         # remove leading empty lines
3281         while (defined $log->[0] && $log->[0] eq "") {
3282                 shift @$log;
3283         }
3284
3285         # print log
3286         my $signoff = 0;
3287         my $empty = 0;
3288         foreach my $line (@$log) {
3289                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3290                         $signoff = 1;
3291                         $empty = 0;
3292                         if (! $opts{'-remove_signoff'}) {
3293                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3294                                 next;
3295                         } else {
3296                                 # remove signoff lines
3297                                 next;
3298                         }
3299                 } else {
3300                         $signoff = 0;
3301                 }
3302
3303                 # print only one empty line
3304                 # do not print empty line after signoff
3305                 if ($line eq "") {
3306                         next if ($empty || $signoff);
3307                         $empty = 1;
3308                 } else {
3309                         $empty = 0;
3310                 }
3311
3312                 print format_log_line_html($line) . "<br/>\n";
3313         }
3314
3315         if ($opts{'-final_empty_line'}) {
3316                 # end with single empty line
3317                 print "<br/>\n" unless $empty;
3318         }
3319 }
3320
3321 # return link target (what link points to)
3322 sub git_get_link_target {
3323         my $hash = shift;
3324         my $link_target;
3325
3326         # read link
3327         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3328                 or return;
3329         {
3330                 local $/;
3331                 $link_target = <$fd>;
3332         }
3333         close $fd
3334                 or return;
3335
3336         return $link_target;
3337 }
3338
3339 # given link target, and the directory (basedir) the link is in,
3340 # return target of link relative to top directory (top tree);
3341 # return undef if it is not possible (including absolute links).
3342 sub normalize_link_target {
3343         my ($link_target, $basedir, $hash_base) = @_;
3344
3345         # we can normalize symlink target only if $hash_base is provided
3346         return unless $hash_base;
3347
3348         # absolute symlinks (beginning with '/') cannot be normalized
3349         return if (substr($link_target, 0, 1) eq '/');
3350
3351         # normalize link target to path from top (root) tree (dir)
3352         my $path;
3353         if ($basedir) {
3354                 $path = $basedir . '/' . $link_target;
3355         } else {
3356                 # we are in top (root) tree (dir)
3357                 $path = $link_target;
3358         }
3359
3360         # remove //, /./, and /../
3361         my @path_parts;
3362         foreach my $part (split('/', $path)) {
3363                 # discard '.' and ''
3364                 next if (!$part || $part eq '.');
3365                 # handle '..'
3366                 if ($part eq '..') {
3367                         if (@path_parts) {
3368                                 pop @path_parts;
3369                         } else {
3370                                 # link leads outside repository (outside top dir)
3371                                 return;
3372                         }
3373                 } else {
3374                         push @path_parts, $part;
3375                 }
3376         }
3377         $path = join('/', @path_parts);
3378
3379         return $path;
3380 }
3381
3382 # print tree entry (row of git_tree), but without encompassing <tr> element
3383 sub git_print_tree_entry {
3384         my ($t, $basedir, $hash_base, $have_blame) = @_;
3385
3386         my %base_key = ();
3387         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3388
3389         # The format of a table row is: mode list link.  Where mode is
3390         # the mode of the entry, list is the name of the entry, an href,
3391         # and link is the action links of the entry.
3392
3393         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3394         if ($t->{'type'} eq "blob") {
3395                 print "<td class=\"list\">" .
3396                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3397                                                file_name=>"$basedir$t->{'name'}", %base_key),
3398                                 -class => "list"}, esc_path($t->{'name'}));
3399                 if (S_ISLNK(oct $t->{'mode'})) {
3400                         my $link_target = git_get_link_target($t->{'hash'});
3401                         if ($link_target) {
3402                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3403                                 if (defined $norm_target) {
3404                                         print " -> " .
3405                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3406                                                                      file_name=>$norm_target),
3407                                                        -title => $norm_target}, esc_path($link_target));
3408                                 } else {
3409                                         print " -> " . esc_path($link_target);
3410                                 }
3411                         }
3412                 }
3413                 print "</td>\n";
3414                 print "<td class=\"link\">";
3415                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3416                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3417                               "blob");
3418                 if ($have_blame) {
3419                         print " | " .
3420                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3421                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3422                                       "blame");
3423                 }
3424                 if (defined $hash_base) {
3425                         print " | " .
3426                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3427                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3428                                       "history");
3429                 }
3430                 print " | " .
3431                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3432                                                file_name=>"$basedir$t->{'name'}")},
3433                                 "raw");
3434                 print "</td>\n";
3435
3436         } elsif ($t->{'type'} eq "tree") {
3437                 print "<td class=\"list\">";
3438                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3439                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3440                               esc_path($t->{'name'}));
3441                 print "</td>\n";
3442                 print "<td class=\"link\">";
3443                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3444                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3445                               "tree");
3446                 if (defined $hash_base) {
3447                         print " | " .
3448                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3449                                                      file_name=>"$basedir$t->{'name'}")},
3450                                       "history");
3451                 }
3452                 print "</td>\n";
3453         } else {
3454                 # unknown object: we can only present history for it
3455                 # (this includes 'commit' object, i.e. submodule support)
3456                 print "<td class=\"list\">" .
3457                       esc_path($t->{'name'}) .
3458                       "</td>\n";
3459                 print "<td class=\"link\">";
3460                 if (defined $hash_base) {
3461                         print $cgi->a({-href => href(action=>"history",
3462                                                      hash_base=>$hash_base,
3463                                                      file_name=>"$basedir$t->{'name'}")},
3464                                       "history");
3465                 }
3466                 print "</td>\n";
3467         }
3468 }
3469
3470 ## ......................................................................
3471 ## functions printing large fragments of HTML
3472
3473 # get pre-image filenames for merge (combined) diff
3474 sub fill_from_file_info {
3475         my ($diff, @parents) = @_;
3476
3477         $diff->{'from_file'} = [ ];
3478         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3479         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3480                 if ($diff->{'status'}[$i] eq 'R' ||
3481                     $diff->{'status'}[$i] eq 'C') {
3482                         $diff->{'from_file'}[$i] =
3483                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3484                 }
3485         }
3486
3487         return $diff;
3488 }
3489
3490 # is current raw difftree line of file deletion
3491 sub is_deleted {
3492         my $diffinfo = shift;
3493
3494         return $diffinfo->{'to_id'} eq ('0' x 40);
3495 }
3496
3497 # does patch correspond to [previous] difftree raw line
3498 # $diffinfo  - hashref of parsed raw diff format
3499 # $patchinfo - hashref of parsed patch diff format
3500 #              (the same keys as in $diffinfo)
3501 sub is_patch_split {
3502         my ($diffinfo, $patchinfo) = @_;
3503
3504         return defined $diffinfo && defined $patchinfo
3505                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3506 }
3507
3508
3509 sub git_difftree_body {
3510         my ($difftree, $hash, @parents) = @_;
3511         my ($parent) = $parents[0];
3512         my $have_blame = gitweb_check_feature('blame');
3513         print "<div class=\"list_head\">\n";
3514         if ($#{$difftree} > 10) {
3515                 print(($#{$difftree} + 1) . " files changed:\n");
3516         }
3517         print "</div>\n";
3518
3519         print "<table class=\"" .
3520               (@parents > 1 ? "combined " : "") .
3521               "diff_tree\">\n";
3522
3523         # header only for combined diff in 'commitdiff' view
3524         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3525         if ($has_header) {
3526                 # table header
3527                 print "<thead><tr>\n" .
3528                        "<th></th><th></th>\n"; # filename, patchN link
3529                 for (my $i = 0; $i < @parents; $i++) {
3530                         my $par = $parents[$i];
3531                         print "<th>" .
3532                               $cgi->a({-href => href(action=>"commitdiff",
3533                                                      hash=>$hash, hash_parent=>$par),
3534                                        -title => 'commitdiff to parent number ' .
3535                                                   ($i+1) . ': ' . substr($par,0,7)},
3536                                       $i+1) .
3537                               "&nbsp;</th>\n";
3538                 }
3539                 print "</tr></thead>\n<tbody>\n";
3540         }
3541
3542         my $alternate = 1;
3543         my $patchno = 0;
3544         foreach my $line (@{$difftree}) {
3545                 my $diff = parsed_difftree_line($line);
3546
3547                 if ($alternate) {
3548                         print "<tr class=\"dark\">\n";
3549                 } else {
3550                         print "<tr class=\"light\">\n";
3551                 }
3552                 $alternate ^= 1;
3553
3554                 if (exists $diff->{'nparents'}) { # combined diff
3555
3556                         fill_from_file_info($diff, @parents)
3557                                 unless exists $diff->{'from_file'};
3558
3559                         if (!is_deleted($diff)) {
3560                                 # file exists in the result (child) commit
3561                                 print "<td>" .
3562                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3563                                                              file_name=>$diff->{'to_file'},
3564                                                              hash_base=>$hash),
3565                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3566                                       "</td>\n";
3567                         } else {
3568                                 print "<td>" .
3569                                       esc_path($diff->{'to_file'}) .
3570                                       "</td>\n";
3571                         }
3572
3573                         if ($action eq 'commitdiff') {
3574                                 # link to patch
3575                                 $patchno++;
3576                                 print "<td class=\"link\">" .
3577                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3578                                       " | " .
3579                                       "</td>\n";
3580                         }
3581
3582                         my $has_history = 0;
3583                         my $not_deleted = 0;
3584                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3585                                 my $hash_parent = $parents[$i];
3586                                 my $from_hash = $diff->{'from_id'}[$i];
3587                                 my $from_path = $diff->{'from_file'}[$i];
3588                                 my $status = $diff->{'status'}[$i];
3589
3590                                 $has_history ||= ($status ne 'A');
3591                                 $not_deleted ||= ($status ne 'D');
3592
3593                                 if ($status eq 'A') {
3594                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3595                                 } elsif ($status eq 'D') {
3596                                         print "<td class=\"link\">" .
3597                                               $cgi->a({-href => href(action=>"blob",
3598                                                                      hash_base=>$hash,
3599                                                                      hash=>$from_hash,
3600                                                                      file_name=>$from_path)},
3601                                                       "blob" . ($i+1)) .
3602                                               " | </td>\n";
3603                                 } else {
3604                                         if ($diff->{'to_id'} eq $from_hash) {
3605                                                 print "<td class=\"link nochange\">";
3606                                         } else {
3607                                                 print "<td class=\"link\">";
3608                                         }
3609                                         print $cgi->a({-href => href(action=>"blobdiff",
3610                                                                      hash=>$diff->{'to_id'},
3611                                                                      hash_parent=>$from_hash,
3612                                                                      hash_base=>$hash,
3613                                                                      hash_parent_base=>$hash_parent,
3614                                                                      file_name=>$diff->{'to_file'},
3615                                                                      file_parent=>$from_path)},
3616                                                       "diff" . ($i+1)) .
3617                                               " | </td>\n";
3618                                 }
3619                         }
3620
3621                         print "<td class=\"link\">";
3622                         if ($not_deleted) {
3623                                 print $cgi->a({-href => href(action=>"blob",
3624                                                              hash=>$diff->{'to_id'},
3625                                                              file_name=>$diff->{'to_file'},
3626                                                              hash_base=>$hash)},
3627                                               "blob");
3628                                 print " | " if ($has_history);
3629                         }
3630                         if ($has_history) {
3631                                 print $cgi->a({-href => href(action=>"history",
3632                                                              file_name=>$diff->{'to_file'},
3633                                                              hash_base=>$hash)},
3634                                               "history");
3635                         }
3636                         print "</td>\n";
3637
3638                         print "</tr>\n";
3639                         next; # instead of 'else' clause, to avoid extra indent
3640                 }
3641                 # else ordinary diff
3642
3643                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3644                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3645                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3646                         $to_mode_oct = oct $diff->{'to_mode'};
3647                         if (S_ISREG($to_mode_oct)) { # only for regular file
3648                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3649                         }
3650                         $to_file_type = file_type($diff->{'to_mode'});
3651                 }
3652                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3653                         $from_mode_oct = oct $diff->{'from_mode'};
3654                         if (S_ISREG($to_mode_oct)) { # only for regular file
3655                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3656                         }
3657                         $from_file_type = file_type($diff->{'from_mode'});
3658                 }
3659
3660                 if ($diff->{'status'} eq "A") { # created
3661                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3662                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3663                         $mode_chng   .= "]</span>";
3664                         print "<td>";
3665                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3666                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3667                                       -class => "list"}, esc_path($diff->{'file'}));
3668                         print "</td>\n";
3669                         print "<td>$mode_chng</td>\n";
3670                         print "<td class=\"link\">";
3671                         if ($action eq 'commitdiff') {
3672                                 # link to patch
3673                                 $patchno++;
3674                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3675                                 print " | ";
3676                         }
3677                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3678                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3679                                       "blob");
3680                         print "</td>\n";
3681
3682                 } elsif ($diff->{'status'} eq "D") { # deleted
3683                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3684                         print "<td>";
3685                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3686                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3687                                        -class => "list"}, esc_path($diff->{'file'}));
3688                         print "</td>\n";
3689                         print "<td>$mode_chng</td>\n";
3690                         print "<td class=\"link\">";
3691                         if ($action eq 'commitdiff') {
3692                                 # link to patch
3693                                 $patchno++;
3694                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3695                                 print " | ";
3696                         }
3697                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3698                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3699                                       "blob") . " | ";
3700                         if ($have_blame) {
3701                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3702                                                              file_name=>$diff->{'file'})},
3703                                               "blame") . " | ";
3704                         }
3705                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3706                                                      file_name=>$diff->{'file'})},
3707                                       "history");
3708                         print "</td>\n";
3709
3710                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3711                         my $mode_chnge = "";
3712                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3713                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3714                                 if ($from_file_type ne $to_file_type) {
3715                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3716                                 }
3717                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3718                                         if ($from_mode_str && $to_mode_str) {
3719                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3720                                         } elsif ($to_mode_str) {
3721                                                 $mode_chnge .= " mode: $to_mode_str";
3722                                         }
3723                                 }
3724                                 $mode_chnge .= "]</span>\n";
3725                         }
3726                         print "<td>";
3727                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3728                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3729                                       -class => "list"}, esc_path($diff->{'file'}));
3730                         print "</td>\n";
3731                         print "<td>$mode_chnge</td>\n";
3732                         print "<td class=\"link\">";
3733                         if ($action eq 'commitdiff') {
3734                                 # link to patch
3735                                 $patchno++;
3736                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3737                                       " | ";
3738                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3739                                 # "commit" view and modified file (not onlu mode changed)
3740                                 print $cgi->a({-href => href(action=>"blobdiff",
3741                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3742                                                              hash_base=>$hash, hash_parent_base=>$parent,
3743                                                              file_name=>$diff->{'file'})},
3744                                               "diff") .
3745                                       " | ";
3746                         }
3747                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3748                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3749                                        "blob") . " | ";
3750                         if ($have_blame) {
3751                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3752                                                              file_name=>$diff->{'file'})},
3753                                               "blame") . " | ";
3754                         }
3755                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3756                                                      file_name=>$diff->{'file'})},
3757                                       "history");
3758                         print "</td>\n";
3759
3760                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3761                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3762                         my $nstatus = $status_name{$diff->{'status'}};
3763                         my $mode_chng = "";
3764                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3765                                 # mode also for directories, so we cannot use $to_mode_str
3766                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3767                         }
3768                         print "<td>" .
3769                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3770                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3771                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3772                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3773                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3774                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3775                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3776                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3777                               "<td class=\"link\">";
3778                         if ($action eq 'commitdiff') {
3779                                 # link to patch
3780                                 $patchno++;
3781                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3782                                       " | ";
3783                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3784                                 # "commit" view and modified file (not only pure rename or copy)
3785                                 print $cgi->a({-href => href(action=>"blobdiff",
3786                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3787                                                              hash_base=>$hash, hash_parent_base=>$parent,
3788                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3789                                               "diff") .
3790                                       " | ";
3791                         }
3792                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3793                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3794                                       "blob") . " | ";
3795                         if ($have_blame) {
3796                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3797                                                              file_name=>$diff->{'to_file'})},
3798                                               "blame") . " | ";
3799                         }
3800                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3801                                                     file_name=>$diff->{'to_file'})},
3802                                       "history");
3803                         print "</td>\n";
3804
3805                 } # we should not encounter Unmerged (U) or Unknown (X) status
3806                 print "</tr>\n";
3807         }
3808         print "</tbody>" if $has_header;
3809         print "</table>\n";
3810 }
3811
3812 sub git_patchset_body {
3813         my ($fd, $difftree, $hash, @hash_parents) = @_;
3814         my ($hash_parent) = $hash_parents[0];
3815
3816         my $is_combined = (@hash_parents > 1);
3817         my $patch_idx = 0;
3818         my $patch_number = 0;
3819         my $patch_line;
3820         my $diffinfo;
3821         my $to_name;
3822         my (%from, %to);
3823
3824         print "<div class=\"patchset\">\n";
3825
3826         # skip to first patch
3827         while ($patch_line = <$fd>) {
3828                 chomp $patch_line;
3829
3830                 last if ($patch_line =~ m/^diff /);
3831         }
3832
3833  PATCH:
3834         while ($patch_line) {
3835
3836                 # parse "git diff" header line
3837                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3838                         # $1 is from_name, which we do not use
3839                         $to_name = unquote($2);
3840                         $to_name =~ s!^b/!!;
3841                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3842                         # $1 is 'cc' or 'combined', which we do not use
3843                         $to_name = unquote($2);
3844                 } else {
3845                         $to_name = undef;
3846                 }
3847
3848                 # check if current patch belong to current raw line
3849                 # and parse raw git-diff line if needed
3850                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3851                         # this is continuation of a split patch
3852                         print "<div class=\"patch cont\">\n";
3853                 } else {
3854                         # advance raw git-diff output if needed
3855                         $patch_idx++ if defined $diffinfo;
3856
3857                         # read and prepare patch information
3858                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3859
3860                         # compact combined diff output can have some patches skipped
3861                         # find which patch (using pathname of result) we are at now;
3862                         if ($is_combined) {
3863                                 while ($to_name ne $diffinfo->{'to_file'}) {
3864                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3865                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3866                                               "</div>\n";  # class="patch"
3867
3868                                         $patch_idx++;
3869                                         $patch_number++;
3870
3871                                         last if $patch_idx > $#$difftree;
3872                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3873                                 }
3874                         }
3875
3876                         # modifies %from, %to hashes
3877                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3878
3879                         # this is first patch for raw difftree line with $patch_idx index
3880                         # we index @$difftree array from 0, but number patches from 1
3881                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3882                 }
3883
3884                 # git diff header
3885                 #assert($patch_line =~ m/^diff /) if DEBUG;
3886                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3887                 $patch_number++;
3888                 # print "git diff" header
3889                 print format_git_diff_header_line($patch_line, $diffinfo,
3890                                                   \%from, \%to);
3891
3892                 # print extended diff header
3893                 print "<div class=\"diff extended_header\">\n";
3894         EXTENDED_HEADER:
3895                 while ($patch_line = <$fd>) {
3896                         chomp $patch_line;
3897
3898                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3899
3900                         print format_extended_diff_header_line($patch_line, $diffinfo,
3901                                                                \%from, \%to);
3902                 }
3903                 print "</div>\n"; # class="diff extended_header"
3904
3905                 # from-file/to-file diff header
3906                 if (! $patch_line) {
3907                         print "</div>\n"; # class="patch"
3908                         last PATCH;
3909                 }
3910                 next PATCH if ($patch_line =~ m/^diff /);
3911                 #assert($patch_line =~ m/^---/) if DEBUG;
3912
3913                 my $last_patch_line = $patch_line;
3914                 $patch_line = <$fd>;
3915                 chomp $patch_line;
3916                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3917
3918                 print format_diff_from_to_header($last_patch_line, $patch_line,
3919                                                  $diffinfo, \%from, \%to,
3920                                                  @hash_parents);
3921
3922                 # the patch itself
3923         LINE:
3924                 while ($patch_line = <$fd>) {
3925                         chomp $patch_line;
3926
3927                         next PATCH if ($patch_line =~ m/^diff /);
3928
3929                         print format_diff_line($patch_line, \%from, \%to);
3930                 }
3931
3932         } continue {
3933                 print "</div>\n"; # class="patch"
3934         }
3935
3936         # for compact combined (--cc) format, with chunk and patch simpliciaction
3937         # patchset might be empty, but there might be unprocessed raw lines
3938         for (++$patch_idx if $patch_number > 0;
3939              $patch_idx < @$difftree;
3940              ++$patch_idx) {
3941                 # read and prepare patch information
3942                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3943
3944                 # generate anchor for "patch" links in difftree / whatchanged part
3945                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3946                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3947                       "</div>\n";  # class="patch"
3948
3949                 $patch_number++;
3950         }
3951
3952         if ($patch_number == 0) {
3953                 if (@hash_parents > 1) {
3954                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3955                 } else {
3956                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3957                 }
3958         }
3959
3960         print "</div>\n"; # class="patchset"
3961 }
3962
3963 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3964
3965 # fills project list info (age, description, owner, forks) for each
3966 # project in the list, removing invalid projects from returned list
3967 # NOTE: modifies $projlist, but does not remove entries from it
3968 sub fill_project_list_info {
3969         my ($projlist, $check_forks) = @_;
3970         my @projects;
3971
3972         my $show_ctags = gitweb_check_feature('ctags');
3973  PROJECT:
3974         foreach my $pr (@$projlist) {
3975                 my (@activity) = git_get_last_activity($pr->{'path'});
3976                 unless (@activity) {
3977                         next PROJECT;
3978                 }
3979                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3980                 if (!defined $pr->{'descr'}) {
3981                         my $descr = git_get_project_description($pr->{'path'}) || "";
3982                         $descr = to_utf8($descr);
3983                         $pr->{'descr_long'} = $descr;
3984                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3985                 }
3986                 if (!defined $pr->{'owner'}) {
3987                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3988                 }
3989                 if ($check_forks) {
3990                         my $pname = $pr->{'path'};
3991                         if (($pname =~ s/\.git$//) &&
3992                             ($pname !~ /\/$/) &&
3993                             (-d "$projectroot/$pname")) {
3994                                 $pr->{'forks'} = "-d $projectroot/$pname";
3995                         }       else {
3996                                 $pr->{'forks'} = 0;
3997                         }
3998                 }
3999                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4000                 push @projects, $pr;
4001         }
4002
4003         return @projects;
4004 }
4005
4006 # print 'sort by' <th> element, generating 'sort by $name' replay link
4007 # if that order is not selected
4008 sub print_sort_th {
4009         my ($name, $order, $header) = @_;
4010         $header ||= ucfirst($name);
4011
4012         if ($order eq $name) {
4013                 print "<th>$header</th>\n";
4014         } else {
4015                 print "<th>" .
4016                       $cgi->a({-href => href(-replay=>1, order=>$name),
4017                                -class => "header"}, $header) .
4018                       "</th>\n";
4019         }
4020 }
4021
4022 sub git_project_list_body {
4023         # actually uses global variable $project
4024         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4025
4026         my $check_forks = gitweb_check_feature('forks');
4027         my @projects = fill_project_list_info($projlist, $check_forks);
4028
4029         $order ||= $default_projects_order;
4030         $from = 0 unless defined $from;
4031         $to = $#projects if (!defined $to || $#projects < $to);
4032
4033         my %order_info = (
4034                 project => { key => 'path', type => 'str' },
4035                 descr => { key => 'descr_long', type => 'str' },
4036                 owner => { key => 'owner', type => 'str' },
4037                 age => { key => 'age', type => 'num' }
4038         );
4039         my $oi = $order_info{$order};
4040         if ($oi->{'type'} eq 'str') {
4041                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4042         } else {
4043                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4044         }
4045
4046         my $show_ctags = gitweb_check_feature('ctags');
4047         if ($show_ctags) {
4048                 my %ctags;
4049                 foreach my $p (@projects) {
4050                         foreach my $ct (keys %{$p->{'ctags'}}) {
4051                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4052                         }
4053                 }
4054                 my $cloud = git_populate_project_tagcloud(\%ctags);
4055                 print git_show_project_tagcloud($cloud, 64);
4056         }
4057
4058         print "<table class=\"project_list\">\n";
4059         unless ($no_header) {
4060                 print "<tr>\n";
4061                 if ($check_forks) {
4062                         print "<th></th>\n";
4063                 }
4064                 print_sort_th('project', $order, 'Project');
4065                 print_sort_th('descr', $order, 'Description');
4066                 print_sort_th('owner', $order, 'Owner');
4067                 print_sort_th('age', $order, 'Last Change');
4068                 print "<th></th>\n" . # for links
4069                       "</tr>\n";
4070         }
4071         my $alternate = 1;
4072         my $tagfilter = $cgi->param('by_tag');
4073         for (my $i = $from; $i <= $to; $i++) {
4074                 my $pr = $projects[$i];
4075
4076                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4077                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4078                         and not $pr->{'descr_long'} =~ /$searchtext/;
4079                 # Weed out forks or non-matching entries of search
4080                 if ($check_forks) {
4081                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4082                         $forkbase="^$forkbase" if $forkbase;
4083                         next if not $searchtext and not $tagfilter and $show_ctags
4084                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4085                 }
4086
4087                 if ($alternate) {
4088                         print "<tr class=\"dark\">\n";
4089                 } else {
4090                         print "<tr class=\"light\">\n";
4091                 }
4092                 $alternate ^= 1;
4093                 if ($check_forks) {
4094                         print "<td>";
4095                         if ($pr->{'forks'}) {
4096                                 print "<!-- $pr->{'forks'} -->\n";
4097                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4098                         }
4099                         print "</td>\n";
4100                 }
4101                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4102                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4103                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4104                                         -class => "list", -title => $pr->{'descr_long'}},
4105                                         esc_html($pr->{'descr'})) . "</td>\n" .
4106                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4107                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4108                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4109                       "<td class=\"link\">" .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4113                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4114                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4115                       "</td>\n" .
4116                       "</tr>\n";
4117         }
4118         if (defined $extra) {
4119                 print "<tr>\n";
4120                 if ($check_forks) {
4121                         print "<td></td>\n";
4122                 }
4123                 print "<td colspan=\"5\">$extra</td>\n" .
4124                       "</tr>\n";
4125         }
4126         print "</table>\n";
4127 }
4128
4129 sub git_shortlog_body {
4130         # uses global variable $project
4131         my ($commitlist, $from, $to, $refs, $extra) = @_;
4132
4133         $from = 0 unless defined $from;
4134         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4135
4136         print "<table class=\"shortlog\">\n";
4137         my $alternate = 1;
4138         for (my $i = $from; $i <= $to; $i++) {
4139                 my %co = %{$commitlist->[$i]};
4140                 my $commit = $co{'id'};
4141                 my $ref = format_ref_marker($refs, $commit);
4142                 if ($alternate) {
4143                         print "<tr class=\"dark\">\n";
4144                 } else {
4145                         print "<tr class=\"light\">\n";
4146                 }
4147                 $alternate ^= 1;
4148                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4149                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4150                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4151                       "<td><i>" . $author . "</i></td>\n" .
4152                       "<td>";
4153                 print format_subject_html($co{'title'}, $co{'title_short'},
4154                                           href(action=>"commit", hash=>$commit), $ref);
4155                 print "</td>\n" .
4156                       "<td class=\"link\">" .
4157                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4158                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4159                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4160                 my $snapshot_links = format_snapshot_links($commit);
4161                 if (defined $snapshot_links) {
4162                         print " | " . $snapshot_links;
4163                 }
4164                 print "</td>\n" .
4165                       "</tr>\n";
4166         }
4167         if (defined $extra) {
4168                 print "<tr>\n" .
4169                       "<td colspan=\"4\">$extra</td>\n" .
4170                       "</tr>\n";
4171         }
4172         print "</table>\n";
4173 }
4174
4175 sub git_history_body {
4176         # Warning: assumes constant type (blob or tree) during history
4177         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4178
4179         $from = 0 unless defined $from;
4180         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4181
4182         print "<table class=\"history\">\n";
4183         my $alternate = 1;
4184         for (my $i = $from; $i <= $to; $i++) {
4185                 my %co = %{$commitlist->[$i]};
4186                 if (!%co) {
4187                         next;
4188                 }
4189                 my $commit = $co{'id'};
4190
4191                 my $ref = format_ref_marker($refs, $commit);
4192
4193                 if ($alternate) {
4194                         print "<tr class=\"dark\">\n";
4195                 } else {
4196                         print "<tr class=\"light\">\n";
4197                 }
4198                 $alternate ^= 1;
4199         # shortlog uses      chop_str($co{'author_name'}, 10)
4200                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4201                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4202                       "<td><i>" . $author . "</i></td>\n" .
4203                       "<td>";
4204                 # originally git_history used chop_str($co{'title'}, 50)
4205                 print format_subject_html($co{'title'}, $co{'title_short'},
4206                                           href(action=>"commit", hash=>$commit), $ref);
4207                 print "</td>\n" .
4208                       "<td class=\"link\">" .
4209                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4210                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4211
4212                 if ($ftype eq 'blob') {
4213                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4214                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4215                         if (defined $blob_current && defined $blob_parent &&
4216                                         $blob_current ne $blob_parent) {
4217                                 print " | " .
4218                                         $cgi->a({-href => href(action=>"blobdiff",
4219                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4220                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4221                                                                file_name=>$file_name)},
4222                                                 "diff to current");
4223                         }
4224                 }
4225                 print "</td>\n" .
4226                       "</tr>\n";
4227         }
4228         if (defined $extra) {
4229                 print "<tr>\n" .
4230                       "<td colspan=\"4\">$extra</td>\n" .
4231                       "</tr>\n";
4232         }
4233         print "</table>\n";
4234 }
4235
4236 sub git_tags_body {
4237         # uses global variable $project
4238         my ($taglist, $from, $to, $extra) = @_;
4239         $from = 0 unless defined $from;
4240         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4241
4242         print "<table class=\"tags\">\n";
4243         my $alternate = 1;
4244         for (my $i = $from; $i <= $to; $i++) {
4245                 my $entry = $taglist->[$i];
4246                 my %tag = %$entry;
4247                 my $comment = $tag{'subject'};
4248                 my $comment_short;
4249                 if (defined $comment) {
4250                         $comment_short = chop_str($comment, 30, 5);
4251                 }
4252                 if ($alternate) {
4253                         print "<tr class=\"dark\">\n";
4254                 } else {
4255                         print "<tr class=\"light\">\n";
4256                 }
4257                 $alternate ^= 1;
4258                 if (defined $tag{'age'}) {
4259                         print "<td><i>$tag{'age'}</i></td>\n";
4260                 } else {
4261                         print "<td></td>\n";
4262                 }
4263                 print "<td>" .
4264                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4265                                -class => "list name"}, esc_html($tag{'name'})) .
4266                       "</td>\n" .
4267                       "<td>";
4268                 if (defined $comment) {
4269                         print format_subject_html($comment, $comment_short,
4270                                                   href(action=>"tag", hash=>$tag{'id'}));
4271                 }
4272                 print "</td>\n" .
4273                       "<td class=\"selflink\">";
4274                 if ($tag{'type'} eq "tag") {
4275                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4276                 } else {
4277                         print "&nbsp;";
4278                 }
4279                 print "</td>\n" .
4280                       "<td class=\"link\">" . " | " .
4281                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4282                 if ($tag{'reftype'} eq "commit") {
4283                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4284                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4285                 } elsif ($tag{'reftype'} eq "blob") {
4286                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4287                 }
4288                 print "</td>\n" .
4289                       "</tr>";
4290         }
4291         if (defined $extra) {
4292                 print "<tr>\n" .
4293                       "<td colspan=\"5\">$extra</td>\n" .
4294                       "</tr>\n";
4295         }
4296         print "</table>\n";
4297 }
4298
4299 sub git_heads_body {
4300         # uses global variable $project
4301         my ($headlist, $head, $from, $to, $extra) = @_;
4302         $from = 0 unless defined $from;
4303         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4304
4305         print "<table class=\"heads\">\n";
4306         my $alternate = 1;
4307         for (my $i = $from; $i <= $to; $i++) {
4308                 my $entry = $headlist->[$i];
4309                 my %ref = %$entry;
4310                 my $curr = $ref{'id'} eq $head;
4311                 if ($alternate) {
4312                         print "<tr class=\"dark\">\n";
4313                 } else {
4314                         print "<tr class=\"light\">\n";
4315                 }
4316                 $alternate ^= 1;
4317                 print "<td><i>$ref{'age'}</i></td>\n" .
4318                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4319                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4320                                -class => "list name"},esc_html($ref{'name'})) .
4321                       "</td>\n" .
4322                       "<td class=\"link\">" .
4323                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4324                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4325                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4326                       "</td>\n" .
4327                       "</tr>";
4328         }
4329         if (defined $extra) {
4330                 print "<tr>\n" .
4331                       "<td colspan=\"3\">$extra</td>\n" .
4332                       "</tr>\n";
4333         }
4334         print "</table>\n";
4335 }
4336
4337 sub git_search_grep_body {
4338         my ($commitlist, $from, $to, $extra) = @_;
4339         $from = 0 unless defined $from;
4340         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4341
4342         print "<table class=\"commit_search\">\n";
4343         my $alternate = 1;
4344         for (my $i = $from; $i <= $to; $i++) {
4345                 my %co = %{$commitlist->[$i]};
4346                 if (!%co) {
4347                         next;
4348                 }
4349                 my $commit = $co{'id'};
4350                 if ($alternate) {
4351                         print "<tr class=\"dark\">\n";
4352                 } else {
4353                         print "<tr class=\"light\">\n";
4354                 }
4355                 $alternate ^= 1;
4356                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4357                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4358                       "<td><i>" . $author . "</i></td>\n" .
4359                       "<td>" .
4360                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4361                                -class => "list subject"},
4362                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4363                 my $comment = $co{'comment'};
4364                 foreach my $line (@$comment) {
4365                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4366                                 my ($lead, $match, $trail) = ($1, $2, $3);
4367                                 $match = chop_str($match, 70, 5, 'center');
4368                                 my $contextlen = int((80 - length($match))/2);
4369                                 $contextlen = 30 if ($contextlen > 30);
4370                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4371                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4372
4373                                 $lead  = esc_html($lead);
4374                                 $match = esc_html($match);
4375                                 $trail = esc_html($trail);
4376
4377                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4378                         }
4379                 }
4380                 print "</td>\n" .
4381                       "<td class=\"link\">" .
4382                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4383                       " | " .
4384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4385                       " | " .
4386                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4387                 print "</td>\n" .
4388                       "</tr>\n";
4389         }
4390         if (defined $extra) {
4391                 print "<tr>\n" .
4392                       "<td colspan=\"3\">$extra</td>\n" .
4393                       "</tr>\n";
4394         }
4395         print "</table>\n";
4396 }
4397
4398 ## ======================================================================
4399 ## ======================================================================
4400 ## actions
4401
4402 sub git_project_list {
4403         my $order = $input_params{'order'};
4404         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4405                 die_error(400, "Unknown order parameter");
4406         }
4407
4408         my @list = git_get_projects_list();
4409         if (!@list) {
4410                 die_error(404, "No projects found");
4411         }
4412
4413         git_header_html();
4414         if (-f $home_text) {
4415                 print "<div class=\"index_include\">\n";
4416                 insert_file($home_text);
4417                 print "</div>\n";
4418         }
4419         print $cgi->startform(-method => "get") .
4420               "<p class=\"projsearch\">Search:\n" .
4421               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4422               "</p>" .
4423               $cgi->end_form() . "\n";
4424         git_project_list_body(\@list, $order);
4425         git_footer_html();
4426 }
4427
4428 sub git_forks {
4429         my $order = $input_params{'order'};
4430         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4431                 die_error(400, "Unknown order parameter");
4432         }
4433
4434         my @list = git_get_projects_list($project);
4435         if (!@list) {
4436                 die_error(404, "No forks found");
4437         }
4438
4439         git_header_html();
4440         git_print_page_nav('','');
4441         git_print_header_div('summary', "$project forks");
4442         git_project_list_body(\@list, $order);
4443         git_footer_html();
4444 }
4445
4446 sub git_project_index {
4447         my @projects = git_get_projects_list($project);
4448
4449         print $cgi->header(
4450                 -type => 'text/plain',
4451                 -charset => 'utf-8',
4452                 -content_disposition => 'inline; filename="index.aux"');
4453
4454         foreach my $pr (@projects) {
4455                 if (!exists $pr->{'owner'}) {
4456                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4457                 }
4458
4459                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4460                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4461                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4462                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4463                 $path  =~ s/ /\+/g;
4464                 $owner =~ s/ /\+/g;
4465
4466                 print "$path $owner\n";
4467         }
4468 }
4469
4470 sub git_summary {
4471         my $descr = git_get_project_description($project) || "none";
4472         my %co = parse_commit("HEAD");
4473         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4474         my $head = $co{'id'};
4475
4476         my $owner = git_get_project_owner($project);
4477
4478         my $refs = git_get_references();
4479         # These get_*_list functions return one more to allow us to see if
4480         # there are more ...
4481         my @taglist  = git_get_tags_list(16);
4482         my @headlist = git_get_heads_list(16);
4483         my @forklist;
4484         my $check_forks = gitweb_check_feature('forks');
4485
4486         if ($check_forks) {
4487                 @forklist = git_get_projects_list($project);
4488         }
4489
4490         git_header_html();
4491         git_print_page_nav('summary','', $head);
4492
4493         print "<div class=\"title\">&nbsp;</div>\n";
4494         print "<table class=\"projects_list\">\n" .
4495               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4496               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4497         if (defined $cd{'rfc2822'}) {
4498                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4499         }
4500
4501         # use per project git URL list in $projectroot/$project/cloneurl
4502         # or make project git URL from git base URL and project name
4503         my $url_tag = "URL";
4504         my @url_list = git_get_project_url_list($project);
4505         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4506         foreach my $git_url (@url_list) {
4507                 next unless $git_url;
4508                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4509                 $url_tag = "";
4510         }
4511
4512         # Tag cloud
4513         my $show_ctags = gitweb_check_feature('ctags');
4514         if ($show_ctags) {
4515                 my $ctags = git_get_project_ctags($project);
4516                 my $cloud = git_populate_project_tagcloud($ctags);
4517                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4518                 print "</td>\n<td>" unless %$ctags;
4519                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4520                 print "</td>\n<td>" if %$ctags;
4521                 print git_show_project_tagcloud($cloud, 48);
4522                 print "</td></tr>";
4523         }
4524
4525         print "</table>\n";
4526
4527         # If XSS prevention is on, we don't include README.html.
4528         # TODO: Allow a readme in some safe format.
4529         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4530                 print "<div class=\"title\">readme</div>\n" .
4531                       "<div class=\"readme\">\n";
4532                 insert_file("$projectroot/$project/README.html");
4533                 print "\n</div>\n"; # class="readme"
4534         }
4535
4536         # we need to request one more than 16 (0..15) to check if
4537         # those 16 are all
4538         my @commitlist = $head ? parse_commits($head, 17) : ();
4539         if (@commitlist) {
4540                 git_print_header_div('shortlog');
4541                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4542                                   $#commitlist <=  15 ? undef :
4543                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4544         }
4545
4546         if (@taglist) {
4547                 git_print_header_div('tags');
4548                 git_tags_body(\@taglist, 0, 15,
4549                               $#taglist <=  15 ? undef :
4550                               $cgi->a({-href => href(action=>"tags")}, "..."));
4551         }
4552
4553         if (@headlist) {
4554                 git_print_header_div('heads');
4555                 git_heads_body(\@headlist, $head, 0, 15,
4556                                $#headlist <= 15 ? undef :
4557                                $cgi->a({-href => href(action=>"heads")}, "..."));
4558         }
4559
4560         if (@forklist) {
4561                 git_print_header_div('forks');
4562                 git_project_list_body(\@forklist, 'age', 0, 15,
4563                                       $#forklist <= 15 ? undef :
4564                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4565                                       'no_header');
4566         }
4567
4568         git_footer_html();
4569 }
4570
4571 sub git_tag {
4572         my $head = git_get_head_hash($project);
4573         git_header_html();
4574         git_print_page_nav('','', $head,undef,$head);
4575         my %tag = parse_tag($hash);
4576
4577         if (! %tag) {
4578                 die_error(404, "Unknown tag object");
4579         }
4580
4581         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4582         print "<div class=\"title_text\">\n" .
4583               "<table class=\"object_header\">\n" .
4584               "<tr>\n" .
4585               "<td>object</td>\n" .
4586               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4587                                $tag{'object'}) . "</td>\n" .
4588               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4589                                               $tag{'type'}) . "</td>\n" .
4590               "</tr>\n";
4591         if (defined($tag{'author'})) {
4592                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4593                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4594                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4595                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4596                         "</td></tr>\n";
4597         }
4598         print "</table>\n\n" .
4599               "</div>\n";
4600         print "<div class=\"page_body\">";
4601         my $comment = $tag{'comment'};
4602         foreach my $line (@$comment) {
4603                 chomp $line;
4604                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4605         }
4606         print "</div>\n";
4607         git_footer_html();
4608 }
4609
4610 sub git_blame {
4611         # permissions
4612         gitweb_check_feature('blame')
4613                 or die_error(403, "Blame view not allowed");
4614
4615         # error checking
4616         die_error(400, "No file name given") unless $file_name;
4617         $hash_base ||= git_get_head_hash($project);
4618         die_error(404, "Couldn't find base commit") unless $hash_base;
4619         my %co = parse_commit($hash_base)
4620                 or die_error(404, "Commit not found");
4621         my $ftype = "blob";
4622         if (!defined $hash) {
4623                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4624                         or die_error(404, "Error looking up file");
4625         } else {
4626                 $ftype = git_get_type($hash);
4627                 if ($ftype !~ "blob") {
4628                         die_error(400, "Object is not a blob");
4629                 }
4630         }
4631
4632         # run git-blame --porcelain
4633         open my $fd, "-|", git_cmd(), "blame", '-p',
4634                 $hash_base, '--', $file_name
4635                 or die_error(500, "Open git-blame failed");
4636
4637         # page header
4638         git_header_html();
4639         my $formats_nav =
4640                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4641                         "blob") .
4642                 " | " .
4643                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4644                         "history") .
4645                 " | " .
4646                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4647                         "HEAD");
4648         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4649         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4650         git_print_page_path($file_name, $ftype, $hash_base);
4651
4652         # page body
4653         my @rev_color = qw(light2 dark2);
4654         my $num_colors = scalar(@rev_color);
4655         my $current_color = 0;
4656         my %metainfo = ();
4657
4658         print <<HTML;
4659 <div class="page_body">
4660 <table class="blame">
4661 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4662 HTML
4663  LINE:
4664         while (my $line = <$fd>) {
4665                 chomp $line;
4666                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4667                 # no <lines in group> for subsequent lines in group of lines
4668                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4669                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4670                 if (!exists $metainfo{$full_rev}) {
4671                         $metainfo{$full_rev} = {};
4672                 }
4673                 my $meta = $metainfo{$full_rev};
4674                 my $data;
4675                 while ($data = <$fd>) {
4676                         chomp $data;
4677                         last if ($data =~ s/^\t//); # contents of line
4678                         if ($data =~ /^(\S+) (.*)$/) {
4679                                 $meta->{$1} = $2;
4680                         }
4681                 }
4682                 my $short_rev = substr($full_rev, 0, 8);
4683                 my $author = $meta->{'author'};
4684                 my %date =
4685                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4686                 my $date = $date{'iso-tz'};
4687                 if ($group_size) {
4688                         $current_color = ($current_color + 1) % $num_colors;
4689                 }
4690                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4691                 if ($group_size) {
4692                         print "<td class=\"sha1\"";
4693                         print " title=\"". esc_html($author) . ", $date\"";
4694                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4695                         print ">";
4696                         print $cgi->a({-href => href(action=>"commit",
4697                                                      hash=>$full_rev,
4698                                                      file_name=>$file_name)},
4699                                       esc_html($short_rev));
4700                         print "</td>\n";
4701                 }
4702                 my $parent_commit;
4703                 if (!exists $meta->{'parent'}) {
4704                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4705                                 or die_error(500, "Open git-rev-parse failed");
4706                         $parent_commit = <$dd>;
4707                         close $dd;
4708                         chomp($parent_commit);
4709                         $meta->{'parent'} = $parent_commit;
4710                 } else {
4711                         $parent_commit = $meta->{'parent'};
4712                 }
4713                 my $blamed = href(action => 'blame',
4714                                   file_name => $meta->{'filename'},
4715                                   hash_base => $parent_commit);
4716                 print "<td class=\"linenr\">";
4717                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4718                                 -class => "linenr" },
4719                               esc_html($lineno));
4720                 print "</td>";
4721                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4722                 print "</tr>\n";
4723         }
4724         print "</table>\n";
4725         print "</div>";
4726         close $fd
4727                 or print "Reading blob failed\n";
4728
4729         # page footer
4730         git_footer_html();
4731 }
4732
4733 sub git_tags {
4734         my $head = git_get_head_hash($project);
4735         git_header_html();
4736         git_print_page_nav('','', $head,undef,$head);
4737         git_print_header_div('summary', $project);
4738
4739         my @tagslist = git_get_tags_list();
4740         if (@tagslist) {
4741                 git_tags_body(\@tagslist);
4742         }
4743         git_footer_html();
4744 }
4745
4746 sub git_heads {
4747         my $head = git_get_head_hash($project);
4748         git_header_html();
4749         git_print_page_nav('','', $head,undef,$head);
4750         git_print_header_div('summary', $project);
4751
4752         my @headslist = git_get_heads_list();
4753         if (@headslist) {
4754                 git_heads_body(\@headslist, $head);
4755         }
4756         git_footer_html();
4757 }
4758
4759 sub git_blob_plain {
4760         my $type = shift;
4761         my $expires;
4762
4763         if (!defined $hash) {
4764                 if (defined $file_name) {
4765                         my $base = $hash_base || git_get_head_hash($project);
4766                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4767                                 or die_error(404, "Cannot find file");
4768                 } else {
4769                         die_error(400, "No file name defined");
4770                 }
4771         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4772                 # blobs defined by non-textual hash id's can be cached
4773                 $expires = "+1d";
4774         }
4775
4776         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4777                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4778
4779         # content-type (can include charset)
4780         $type = blob_contenttype($fd, $file_name, $type);
4781
4782         # "save as" filename, even when no $file_name is given
4783         my $save_as = "$hash";
4784         if (defined $file_name) {
4785                 $save_as = $file_name;
4786         } elsif ($type =~ m/^text\//) {
4787                 $save_as .= '.txt';
4788         }
4789
4790         # With XSS prevention on, blobs of all types except a few known safe
4791         # ones are served with "Content-Disposition: attachment" to make sure
4792         # they don't run in our security domain.  For certain image types,
4793         # blob view writes an <img> tag referring to blob_plain view, and we
4794         # want to be sure not to break that by serving the image as an
4795         # attachment (though Firefox 3 doesn't seem to care).
4796         my $sandbox = $prevent_xss &&
4797                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4798
4799         print $cgi->header(
4800                 -type => $type,
4801                 -expires => $expires,
4802                 -content_disposition =>
4803                         ($sandbox ? 'attachment' : 'inline')
4804                         . '; filename="' . $save_as . '"');
4805         undef $/;
4806         binmode STDOUT, ':raw';
4807         print <$fd>;
4808         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4809         $/ = "\n";
4810         close $fd;
4811 }
4812
4813 sub git_blob {
4814         my $expires;
4815
4816         if (!defined $hash) {
4817                 if (defined $file_name) {
4818                         my $base = $hash_base || git_get_head_hash($project);
4819                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4820                                 or die_error(404, "Cannot find file");
4821                 } else {
4822                         die_error(400, "No file name defined");
4823                 }
4824         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4825                 # blobs defined by non-textual hash id's can be cached
4826                 $expires = "+1d";
4827         }
4828
4829         my $have_blame = gitweb_check_feature('blame');
4830         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4831                 or die_error(500, "Couldn't cat $file_name, $hash");
4832         my $mimetype = blob_mimetype($fd, $file_name);
4833         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4834                 close $fd;
4835                 return git_blob_plain($mimetype);
4836         }
4837         # we can have blame only for text/* mimetype
4838         $have_blame &&= ($mimetype =~ m!^text/!);
4839
4840         git_header_html(undef, $expires);
4841         my $formats_nav = '';
4842         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4843                 if (defined $file_name) {
4844                         if ($have_blame) {
4845                                 $formats_nav .=
4846                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4847                                                 "blame") .
4848                                         " | ";
4849                         }
4850                         $formats_nav .=
4851                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4852                                         "history") .
4853                                 " | " .
4854                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4855                                         "raw") .
4856                                 " | " .
4857                                 $cgi->a({-href => href(action=>"blob",
4858                                                        hash_base=>"HEAD", file_name=>$file_name)},
4859                                         "HEAD");
4860                 } else {
4861                         $formats_nav .=
4862                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4863                                         "raw");
4864                 }
4865                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4866                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4867         } else {
4868                 print "<div class=\"page_nav\">\n" .
4869                       "<br/><br/></div>\n" .
4870                       "<div class=\"title\">$hash</div>\n";
4871         }
4872         git_print_page_path($file_name, "blob", $hash_base);
4873         print "<div class=\"page_body\">\n";
4874         if ($mimetype =~ m!^image/!) {
4875                 print qq!<img type="$mimetype"!;
4876                 if ($file_name) {
4877                         print qq! alt="$file_name" title="$file_name"!;
4878                 }
4879                 print qq! src="! .
4880                       href(action=>"blob_plain", hash=>$hash,
4881                            hash_base=>$hash_base, file_name=>$file_name) .
4882                       qq!" />\n!;
4883         } else {
4884                 my $nr;
4885                 while (my $line = <$fd>) {
4886                         chomp $line;
4887                         $nr++;
4888                         $line = untabify($line);
4889                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4890                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4891                 }
4892         }
4893         close $fd
4894                 or print "Reading blob failed.\n";
4895         print "</div>";
4896         git_footer_html();
4897 }
4898
4899 sub git_tree {
4900         if (!defined $hash_base) {
4901                 $hash_base = "HEAD";
4902         }
4903         if (!defined $hash) {
4904                 if (defined $file_name) {
4905                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4906                 } else {
4907                         $hash = $hash_base;
4908                 }
4909         }
4910         die_error(404, "No such tree") unless defined($hash);
4911         $/ = "\0";
4912         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4913                 or die_error(500, "Open git-ls-tree failed");
4914         my @entries = map { chomp; $_ } <$fd>;
4915         close $fd or die_error(404, "Reading tree failed");
4916         $/ = "\n";
4917
4918         my $refs = git_get_references();
4919         my $ref = format_ref_marker($refs, $hash_base);
4920         git_header_html();
4921         my $basedir = '';
4922         my $have_blame = gitweb_check_feature('blame');
4923         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4924                 my @views_nav = ();
4925                 if (defined $file_name) {
4926                         push @views_nav,
4927                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4928                                         "history"),
4929                                 $cgi->a({-href => href(action=>"tree",
4930                                                        hash_base=>"HEAD", file_name=>$file_name)},
4931                                         "HEAD"),
4932                 }
4933                 my $snapshot_links = format_snapshot_links($hash);
4934                 if (defined $snapshot_links) {
4935                         # FIXME: Should be available when we have no hash base as well.
4936                         push @views_nav, $snapshot_links;
4937                 }
4938                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4939                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4940         } else {
4941                 undef $hash_base;
4942                 print "<div class=\"page_nav\">\n";
4943                 print "<br/><br/></div>\n";
4944                 print "<div class=\"title\">$hash</div>\n";
4945         }
4946         if (defined $file_name) {
4947                 $basedir = $file_name;
4948                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4949                         $basedir .= '/';
4950                 }
4951                 git_print_page_path($file_name, 'tree', $hash_base);
4952         }
4953         print "<div class=\"page_body\">\n";
4954         print "<table class=\"tree\">\n";
4955         my $alternate = 1;
4956         # '..' (top directory) link if possible
4957         if (defined $hash_base &&
4958             defined $file_name && $file_name =~ m![^/]+$!) {
4959                 if ($alternate) {
4960                         print "<tr class=\"dark\">\n";
4961                 } else {
4962                         print "<tr class=\"light\">\n";
4963                 }
4964                 $alternate ^= 1;
4965
4966                 my $up = $file_name;
4967                 $up =~ s!/?[^/]+$!!;
4968                 undef $up unless $up;
4969                 # based on git_print_tree_entry
4970                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4971                 print '<td class="list">';
4972                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4973                                              file_name=>$up)},
4974                               "..");
4975                 print "</td>\n";
4976                 print "<td class=\"link\"></td>\n";
4977
4978                 print "</tr>\n";
4979         }
4980         foreach my $line (@entries) {
4981                 my %t = parse_ls_tree_line($line, -z => 1);
4982
4983                 if ($alternate) {
4984                         print "<tr class=\"dark\">\n";
4985                 } else {
4986                         print "<tr class=\"light\">\n";
4987                 }
4988                 $alternate ^= 1;
4989
4990                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4991
4992                 print "</tr>\n";
4993         }
4994         print "</table>\n" .
4995               "</div>";
4996         git_footer_html();
4997 }
4998
4999 sub git_snapshot {
5000         my $format = $input_params{'snapshot_format'};
5001         if (!@snapshot_fmts) {
5002                 die_error(403, "Snapshots not allowed");
5003         }
5004         # default to first supported snapshot format
5005         $format ||= $snapshot_fmts[0];
5006         if ($format !~ m/^[a-z0-9]+$/) {
5007                 die_error(400, "Invalid snapshot format parameter");
5008         } elsif (!exists($known_snapshot_formats{$format})) {
5009                 die_error(400, "Unknown snapshot format");
5010         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5011                 die_error(403, "Unsupported snapshot format");
5012         }
5013
5014         if (!defined $hash) {
5015                 $hash = git_get_head_hash($project);
5016         }
5017
5018         my $name = $project;
5019         $name =~ s,([^/])/*\.git$,$1,;
5020         $name = basename($name);
5021         my $filename = to_utf8($name);
5022         $name =~ s/\047/\047\\\047\047/g;
5023         my $cmd;
5024         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5025         $cmd = quote_command(
5026                 git_cmd(), 'archive',
5027                 "--format=$known_snapshot_formats{$format}{'format'}",
5028                 "--prefix=$name/", $hash);
5029         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5030                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5031         }
5032
5033         print $cgi->header(
5034                 -type => $known_snapshot_formats{$format}{'type'},
5035                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5036                 -status => '200 OK');
5037
5038         open my $fd, "-|", $cmd
5039                 or die_error(500, "Execute git-archive failed");
5040         binmode STDOUT, ':raw';
5041         print <$fd>;
5042         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5043         close $fd;
5044 }
5045
5046 sub git_log {
5047         my $head = git_get_head_hash($project);
5048         if (!defined $hash) {
5049                 $hash = $head;
5050         }
5051         if (!defined $page) {
5052                 $page = 0;
5053         }
5054         my $refs = git_get_references();
5055
5056         my @commitlist = parse_commits($hash, 101, (100 * $page));
5057
5058         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5059
5060         my ($patch_max) = gitweb_get_feature('patches');
5061         if ($patch_max) {
5062                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5063                         $paging_nav .= " &sdot; " .
5064                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5065                                         "patches");
5066                 }
5067         }
5068
5069         git_header_html();
5070         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5071
5072         if (!@commitlist) {
5073                 my %co = parse_commit($hash);
5074
5075                 git_print_header_div('summary', $project);
5076                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5077         }
5078         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5079         for (my $i = 0; $i <= $to; $i++) {
5080                 my %co = %{$commitlist[$i]};
5081                 next if !%co;
5082                 my $commit = $co{'id'};
5083                 my $ref = format_ref_marker($refs, $commit);
5084                 my %ad = parse_date($co{'author_epoch'});
5085                 git_print_header_div('commit',
5086                                "<span class=\"age\">$co{'age_string'}</span>" .
5087                                esc_html($co{'title'}) . $ref,
5088                                $commit);
5089                 print "<div class=\"title_text\">\n" .
5090                       "<div class=\"log_link\">\n" .
5091                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5092                       " | " .
5093                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5094                       " | " .
5095                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5096                       "<br/>\n" .
5097                       "</div>\n" .
5098                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5099                       "</div>\n";
5100
5101                 print "<div class=\"log_body\">\n";
5102                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5103                 print "</div>\n";
5104         }
5105         if ($#commitlist >= 100) {
5106                 print "<div class=\"page_nav\">\n";
5107                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5108                                -accesskey => "n", -title => "Alt-n"}, "next");
5109                 print "</div>\n";
5110         }
5111         git_footer_html();
5112 }
5113
5114 sub git_commit {
5115         $hash ||= $hash_base || "HEAD";
5116         my %co = parse_commit($hash)
5117             or die_error(404, "Unknown commit object");
5118         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5119         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5120
5121         my $parent  = $co{'parent'};
5122         my $parents = $co{'parents'}; # listref
5123
5124         # we need to prepare $formats_nav before any parameter munging
5125         my $formats_nav;
5126         if (!defined $parent) {
5127                 # --root commitdiff
5128                 $formats_nav .= '(initial)';
5129         } elsif (@$parents == 1) {
5130                 # single parent commit
5131                 $formats_nav .=
5132                         '(parent: ' .
5133                         $cgi->a({-href => href(action=>"commit",
5134                                                hash=>$parent)},
5135                                 esc_html(substr($parent, 0, 7))) .
5136                         ')';
5137         } else {
5138                 # merge commit
5139                 $formats_nav .=
5140                         '(merge: ' .
5141                         join(' ', map {
5142                                 $cgi->a({-href => href(action=>"commit",
5143                                                        hash=>$_)},
5144                                         esc_html(substr($_, 0, 7)));
5145                         } @$parents ) .
5146                         ')';
5147         }
5148         if (gitweb_check_feature('patches')) {
5149                 $formats_nav .= " | " .
5150                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5151                                 "patch");
5152         }
5153
5154         if (!defined $parent) {
5155                 $parent = "--root";
5156         }
5157         my @difftree;
5158         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5159                 @diff_opts,
5160                 (@$parents <= 1 ? $parent : '-c'),
5161                 $hash, "--"
5162                 or die_error(500, "Open git-diff-tree failed");
5163         @difftree = map { chomp; $_ } <$fd>;
5164         close $fd or die_error(404, "Reading git-diff-tree failed");
5165
5166         # non-textual hash id's can be cached
5167         my $expires;
5168         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5169                 $expires = "+1d";
5170         }
5171         my $refs = git_get_references();
5172         my $ref = format_ref_marker($refs, $co{'id'});
5173
5174         git_header_html(undef, $expires);
5175         git_print_page_nav('commit', '',
5176                            $hash, $co{'tree'}, $hash,
5177                            $formats_nav);
5178
5179         if (defined $co{'parent'}) {
5180                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5181         } else {
5182                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5183         }
5184         print "<div class=\"title_text\">\n" .
5185               "<table class=\"object_header\">\n";
5186         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5187               "<tr>" .
5188               "<td></td><td> $ad{'rfc2822'}";
5189         if ($ad{'hour_local'} < 6) {
5190                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5191                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5192         } else {
5193                 printf(" (%02d:%02d %s)",
5194                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5195         }
5196         print "</td>" .
5197               "</tr>\n";
5198         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5199         print "<tr><td></td><td> $cd{'rfc2822'}" .
5200               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5201               "</td></tr>\n";
5202         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5203         print "<tr>" .
5204               "<td>tree</td>" .
5205               "<td class=\"sha1\">" .
5206               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5207                        class => "list"}, $co{'tree'}) .
5208               "</td>" .
5209               "<td class=\"link\">" .
5210               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5211                       "tree");
5212         my $snapshot_links = format_snapshot_links($hash);
5213         if (defined $snapshot_links) {
5214                 print " | " . $snapshot_links;
5215         }
5216         print "</td>" .
5217               "</tr>\n";
5218
5219         foreach my $par (@$parents) {
5220                 print "<tr>" .
5221                       "<td>parent</td>" .
5222                       "<td class=\"sha1\">" .
5223                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5224                                class => "list"}, $par) .
5225                       "</td>" .
5226                       "<td class=\"link\">" .
5227                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5228                       " | " .
5229                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5230                       "</td>" .
5231                       "</tr>\n";
5232         }
5233         print "</table>".
5234               "</div>\n";
5235
5236         print "<div class=\"page_body\">\n";
5237         git_print_log($co{'comment'});
5238         print "</div>\n";
5239
5240         git_difftree_body(\@difftree, $hash, @$parents);
5241
5242         git_footer_html();
5243 }
5244
5245 sub git_object {
5246         # object is defined by:
5247         # - hash or hash_base alone
5248         # - hash_base and file_name
5249         my $type;
5250
5251         # - hash or hash_base alone
5252         if ($hash || ($hash_base && !defined $file_name)) {
5253                 my $object_id = $hash || $hash_base;
5254
5255                 open my $fd, "-|", quote_command(
5256                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5257                         or die_error(404, "Object does not exist");
5258                 $type = <$fd>;
5259                 chomp $type;
5260                 close $fd
5261                         or die_error(404, "Object does not exist");
5262
5263         # - hash_base and file_name
5264         } elsif ($hash_base && defined $file_name) {
5265                 $file_name =~ s,/+$,,;
5266
5267                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5268                         or die_error(404, "Base object does not exist");
5269
5270                 # here errors should not hapen
5271                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5272                         or die_error(500, "Open git-ls-tree failed");
5273                 my $line = <$fd>;
5274                 close $fd;
5275
5276                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5277                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5278                         die_error(404, "File or directory for given base does not exist");
5279                 }
5280                 $type = $2;
5281                 $hash = $3;
5282         } else {
5283                 die_error(400, "Not enough information to find object");
5284         }
5285
5286         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5287                                           hash=>$hash, hash_base=>$hash_base,
5288                                           file_name=>$file_name),
5289                              -status => '302 Found');
5290 }
5291
5292 sub git_blobdiff {
5293         my $format = shift || 'html';
5294
5295         my $fd;
5296         my @difftree;
5297         my %diffinfo;
5298         my $expires;
5299
5300         # preparing $fd and %diffinfo for git_patchset_body
5301         # new style URI
5302         if (defined $hash_base && defined $hash_parent_base) {
5303                 if (defined $file_name) {
5304                         # read raw output
5305                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5306                                 $hash_parent_base, $hash_base,
5307                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5308                                 or die_error(500, "Open git-diff-tree failed");
5309                         @difftree = map { chomp; $_ } <$fd>;
5310                         close $fd
5311                                 or die_error(404, "Reading git-diff-tree failed");
5312                         @difftree
5313                                 or die_error(404, "Blob diff not found");
5314
5315                 } elsif (defined $hash &&
5316                          $hash =~ /[0-9a-fA-F]{40}/) {
5317                         # try to find filename from $hash
5318
5319                         # read filtered raw output
5320                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5321                                 $hash_parent_base, $hash_base, "--"
5322                                 or die_error(500, "Open git-diff-tree failed");
5323                         @difftree =
5324                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5325                                 # $hash == to_id
5326                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5327                                 map { chomp; $_ } <$fd>;
5328                         close $fd
5329                                 or die_error(404, "Reading git-diff-tree failed");
5330                         @difftree
5331                                 or die_error(404, "Blob diff not found");
5332
5333                 } else {
5334                         die_error(400, "Missing one of the blob diff parameters");
5335                 }
5336
5337                 if (@difftree > 1) {
5338                         die_error(400, "Ambiguous blob diff specification");
5339                 }
5340
5341                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5342                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5343                 $file_name   ||= $diffinfo{'to_file'};
5344
5345                 $hash_parent ||= $diffinfo{'from_id'};
5346                 $hash        ||= $diffinfo{'to_id'};
5347
5348                 # non-textual hash id's can be cached
5349                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5350                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5351                         $expires = '+1d';
5352                 }
5353
5354                 # open patch output
5355                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5356                         '-p', ($format eq 'html' ? "--full-index" : ()),
5357                         $hash_parent_base, $hash_base,
5358                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5359                         or die_error(500, "Open git-diff-tree failed");
5360         }
5361
5362         # old/legacy style URI -- not generated anymore since 1.4.3.
5363         if (!%diffinfo) {
5364                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5365         }
5366
5367         # header
5368         if ($format eq 'html') {
5369                 my $formats_nav =
5370                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5371                                 "raw");
5372                 git_header_html(undef, $expires);
5373                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5374                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5375                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5376                 } else {
5377                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5378                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5379                 }
5380                 if (defined $file_name) {
5381                         git_print_page_path($file_name, "blob", $hash_base);
5382                 } else {
5383                         print "<div class=\"page_path\"></div>\n";
5384                 }
5385
5386         } elsif ($format eq 'plain') {
5387                 print $cgi->header(
5388                         -type => 'text/plain',
5389                         -charset => 'utf-8',
5390                         -expires => $expires,
5391                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5392
5393                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5394
5395         } else {
5396                 die_error(400, "Unknown blobdiff format");
5397         }
5398
5399         # patch
5400         if ($format eq 'html') {
5401                 print "<div class=\"page_body\">\n";
5402
5403                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5404                 close $fd;
5405
5406                 print "</div>\n"; # class="page_body"
5407                 git_footer_html();
5408
5409         } else {
5410                 while (my $line = <$fd>) {
5411                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5412                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5413
5414                         print $line;
5415
5416                         last if $line =~ m!^\+\+\+!;
5417                 }
5418                 local $/ = undef;
5419                 print <$fd>;
5420                 close $fd;
5421         }
5422 }
5423
5424 sub git_blobdiff_plain {
5425         git_blobdiff('plain');
5426 }
5427
5428 sub git_commitdiff {
5429         my %params = @_;
5430         my $format = $params{-format} || 'html';
5431
5432         my ($patch_max) = gitweb_get_feature('patches');
5433         if ($format eq 'patch') {
5434                 die_error(403, "Patch view not allowed") unless $patch_max;
5435         }
5436
5437         $hash ||= $hash_base || "HEAD";
5438         my %co = parse_commit($hash)
5439             or die_error(404, "Unknown commit object");
5440
5441         # choose format for commitdiff for merge
5442         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5443                 $hash_parent = '--cc';
5444         }
5445         # we need to prepare $formats_nav before almost any parameter munging
5446         my $formats_nav;
5447         if ($format eq 'html') {
5448                 $formats_nav =
5449                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5450                                 "raw");
5451                 if ($patch_max) {
5452                         $formats_nav .= " | " .
5453                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5454                                         "patch");
5455                 }
5456
5457                 if (defined $hash_parent &&
5458                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5459                         # commitdiff with two commits given
5460                         my $hash_parent_short = $hash_parent;
5461                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5462                                 $hash_parent_short = substr($hash_parent, 0, 7);
5463                         }
5464                         $formats_nav .=
5465                                 ' (from';
5466                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5467                                 if ($co{'parents'}[$i] eq $hash_parent) {
5468                                         $formats_nav .= ' parent ' . ($i+1);
5469                                         last;
5470                                 }
5471                         }
5472                         $formats_nav .= ': ' .
5473                                 $cgi->a({-href => href(action=>"commitdiff",
5474                                                        hash=>$hash_parent)},
5475                                         esc_html($hash_parent_short)) .
5476                                 ')';
5477                 } elsif (!$co{'parent'}) {
5478                         # --root commitdiff
5479                         $formats_nav .= ' (initial)';
5480                 } elsif (scalar @{$co{'parents'}} == 1) {
5481                         # single parent commit
5482                         $formats_nav .=
5483                                 ' (parent: ' .
5484                                 $cgi->a({-href => href(action=>"commitdiff",
5485                                                        hash=>$co{'parent'})},
5486                                         esc_html(substr($co{'parent'}, 0, 7))) .
5487                                 ')';
5488                 } else {
5489                         # merge commit
5490                         if ($hash_parent eq '--cc') {
5491                                 $formats_nav .= ' | ' .
5492                                         $cgi->a({-href => href(action=>"commitdiff",
5493                                                                hash=>$hash, hash_parent=>'-c')},
5494                                                 'combined');
5495                         } else { # $hash_parent eq '-c'
5496                                 $formats_nav .= ' | ' .
5497                                         $cgi->a({-href => href(action=>"commitdiff",
5498                                                                hash=>$hash, hash_parent=>'--cc')},
5499                                                 'compact');
5500                         }
5501                         $formats_nav .=
5502                                 ' (merge: ' .
5503                                 join(' ', map {
5504                                         $cgi->a({-href => href(action=>"commitdiff",
5505                                                                hash=>$_)},
5506                                                 esc_html(substr($_, 0, 7)));
5507                                 } @{$co{'parents'}} ) .
5508                                 ')';
5509                 }
5510         }
5511
5512         my $hash_parent_param = $hash_parent;
5513         if (!defined $hash_parent_param) {
5514                 # --cc for multiple parents, --root for parentless
5515                 $hash_parent_param =
5516                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5517         }
5518
5519         # read commitdiff
5520         my $fd;
5521         my @difftree;
5522         if ($format eq 'html') {
5523                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5524                         "--no-commit-id", "--patch-with-raw", "--full-index",
5525                         $hash_parent_param, $hash, "--"
5526                         or die_error(500, "Open git-diff-tree failed");
5527
5528                 while (my $line = <$fd>) {
5529                         chomp $line;
5530                         # empty line ends raw part of diff-tree output
5531                         last unless $line;
5532                         push @difftree, scalar parse_difftree_raw_line($line);
5533                 }
5534
5535         } elsif ($format eq 'plain') {
5536                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5537                         '-p', $hash_parent_param, $hash, "--"
5538                         or die_error(500, "Open git-diff-tree failed");
5539         } elsif ($format eq 'patch') {
5540                 # For commit ranges, we limit the output to the number of
5541                 # patches specified in the 'patches' feature.
5542                 # For single commits, we limit the output to a single patch,
5543                 # diverging from the git-format-patch default.
5544                 my @commit_spec = ();
5545                 if ($hash_parent) {
5546                         if ($patch_max > 0) {
5547                                 push @commit_spec, "-$patch_max";
5548                         }
5549                         push @commit_spec, '-n', "$hash_parent..$hash";
5550                 } else {
5551                         if ($params{-single}) {
5552                                 push @commit_spec, '-1';
5553                         } else {
5554                                 if ($patch_max > 0) {
5555                                         push @commit_spec, "-$patch_max";
5556                                 }
5557                                 push @commit_spec, "-n";
5558                         }
5559                         push @commit_spec, '--root', $hash;
5560                 }
5561                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5562                         '--stdout', @commit_spec
5563                         or die_error(500, "Open git-format-patch failed");
5564         } else {
5565                 die_error(400, "Unknown commitdiff format");
5566         }
5567
5568         # non-textual hash id's can be cached
5569         my $expires;
5570         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5571                 $expires = "+1d";
5572         }
5573
5574         # write commit message
5575         if ($format eq 'html') {
5576                 my $refs = git_get_references();
5577                 my $ref = format_ref_marker($refs, $co{'id'});
5578
5579                 git_header_html(undef, $expires);
5580                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5581                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5582                 git_print_authorship(\%co);
5583                 print "<div class=\"page_body\">\n";
5584                 if (@{$co{'comment'}} > 1) {
5585                         print "<div class=\"log\">\n";
5586                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5587                         print "</div>\n"; # class="log"
5588                 }
5589
5590         } elsif ($format eq 'plain') {
5591                 my $refs = git_get_references("tags");
5592                 my $tagname = git_get_rev_name_tags($hash);
5593                 my $filename = basename($project) . "-$hash.patch";
5594
5595                 print $cgi->header(
5596                         -type => 'text/plain',
5597                         -charset => 'utf-8',
5598                         -expires => $expires,
5599                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5600                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5601                 print "From: " . to_utf8($co{'author'}) . "\n";
5602                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5603                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5604
5605                 print "X-Git-Tag: $tagname\n" if $tagname;
5606                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5607
5608                 foreach my $line (@{$co{'comment'}}) {
5609                         print to_utf8($line) . "\n";
5610                 }
5611                 print "---\n\n";
5612         } elsif ($format eq 'patch') {
5613                 my $filename = basename($project) . "-$hash.patch";
5614
5615                 print $cgi->header(
5616                         -type => 'text/plain',
5617                         -charset => 'utf-8',
5618                         -expires => $expires,
5619                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5620         }
5621
5622         # write patch
5623         if ($format eq 'html') {
5624                 my $use_parents = !defined $hash_parent ||
5625                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5626                 git_difftree_body(\@difftree, $hash,
5627                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5628                 print "<br/>\n";
5629
5630                 git_patchset_body($fd, \@difftree, $hash,
5631                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5632                 close $fd;
5633                 print "</div>\n"; # class="page_body"
5634                 git_footer_html();
5635
5636         } elsif ($format eq 'plain') {
5637                 local $/ = undef;
5638                 print <$fd>;
5639                 close $fd
5640                         or print "Reading git-diff-tree failed\n";
5641         } elsif ($format eq 'patch') {
5642                 local $/ = undef;
5643                 print <$fd>;
5644                 close $fd
5645                         or print "Reading git-format-patch failed\n";
5646         }
5647 }
5648
5649 sub git_commitdiff_plain {
5650         git_commitdiff(-format => 'plain');
5651 }
5652
5653 # format-patch-style patches
5654 sub git_patch {
5655         git_commitdiff(-format => 'patch', -single=> 1);
5656 }
5657
5658 sub git_patches {
5659         git_commitdiff(-format => 'patch');
5660 }
5661
5662 sub git_history {
5663         if (!defined $hash_base) {
5664                 $hash_base = git_get_head_hash($project);
5665         }
5666         if (!defined $page) {
5667                 $page = 0;
5668         }
5669         my $ftype;
5670         my %co = parse_commit($hash_base)
5671             or die_error(404, "Unknown commit object");
5672
5673         my $refs = git_get_references();
5674         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5675
5676         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5677                                        $file_name, "--full-history")
5678             or die_error(404, "No such file or directory on given branch");
5679
5680         if (!defined $hash && defined $file_name) {
5681                 # some commits could have deleted file in question,
5682                 # and not have it in tree, but one of them has to have it
5683                 for (my $i = 0; $i <= @commitlist; $i++) {
5684                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5685                         last if defined $hash;
5686                 }
5687         }
5688         if (defined $hash) {
5689                 $ftype = git_get_type($hash);
5690         }
5691         if (!defined $ftype) {
5692                 die_error(500, "Unknown type of object");
5693         }
5694
5695         my $paging_nav = '';
5696         if ($page > 0) {
5697                 $paging_nav .=
5698                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5699                                                file_name=>$file_name)},
5700                                 "first");
5701                 $paging_nav .= " &sdot; " .
5702                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5703                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5704         } else {
5705                 $paging_nav .= "first";
5706                 $paging_nav .= " &sdot; prev";
5707         }
5708         my $next_link = '';
5709         if ($#commitlist >= 100) {
5710                 $next_link =
5711                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5712                                  -accesskey => "n", -title => "Alt-n"}, "next");
5713                 $paging_nav .= " &sdot; $next_link";
5714         } else {
5715                 $paging_nav .= " &sdot; next";
5716         }
5717
5718         git_header_html();
5719         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5720         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5721         git_print_page_path($file_name, $ftype, $hash_base);
5722
5723         git_history_body(\@commitlist, 0, 99,
5724                          $refs, $hash_base, $ftype, $next_link);
5725
5726         git_footer_html();
5727 }
5728
5729 sub git_search {
5730         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5731         if (!defined $searchtext) {
5732                 die_error(400, "Text field is empty");
5733         }
5734         if (!defined $hash) {
5735                 $hash = git_get_head_hash($project);
5736         }
5737         my %co = parse_commit($hash);
5738         if (!%co) {
5739                 die_error(404, "Unknown commit object");
5740         }
5741         if (!defined $page) {
5742                 $page = 0;
5743         }
5744
5745         $searchtype ||= 'commit';
5746         if ($searchtype eq 'pickaxe') {
5747                 # pickaxe may take all resources of your box and run for several minutes
5748                 # with every query - so decide by yourself how public you make this feature
5749                 gitweb_check_feature('pickaxe')
5750                     or die_error(403, "Pickaxe is disabled");
5751         }
5752         if ($searchtype eq 'grep') {
5753                 gitweb_check_feature('grep')[0]
5754                     or die_error(403, "Grep is disabled");
5755         }
5756
5757         git_header_html();
5758
5759         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5760                 my $greptype;
5761                 if ($searchtype eq 'commit') {
5762                         $greptype = "--grep=";
5763                 } elsif ($searchtype eq 'author') {
5764                         $greptype = "--author=";
5765                 } elsif ($searchtype eq 'committer') {
5766                         $greptype = "--committer=";
5767                 }
5768                 $greptype .= $searchtext;
5769                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5770                                                $greptype, '--regexp-ignore-case',
5771                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5772
5773                 my $paging_nav = '';
5774                 if ($page > 0) {
5775                         $paging_nav .=
5776                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5777                                                        searchtext=>$searchtext,
5778                                                        searchtype=>$searchtype)},
5779                                         "first");
5780                         $paging_nav .= " &sdot; " .
5781                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5782                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5783                 } else {
5784                         $paging_nav .= "first";
5785                         $paging_nav .= " &sdot; prev";
5786                 }
5787                 my $next_link = '';
5788                 if ($#commitlist >= 100) {
5789                         $next_link =
5790                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5791                                          -accesskey => "n", -title => "Alt-n"}, "next");
5792                         $paging_nav .= " &sdot; $next_link";
5793                 } else {
5794                         $paging_nav .= " &sdot; next";
5795                 }
5796
5797                 if ($#commitlist >= 100) {
5798                 }
5799
5800                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5801                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5802                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5803         }
5804
5805         if ($searchtype eq 'pickaxe') {
5806                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5807                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5808
5809                 print "<table class=\"pickaxe search\">\n";
5810                 my $alternate = 1;
5811                 $/ = "\n";
5812                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5813                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5814                         ($search_use_regexp ? '--pickaxe-regex' : ());
5815                 undef %co;
5816                 my @files;
5817                 while (my $line = <$fd>) {
5818                         chomp $line;
5819                         next unless $line;
5820
5821                         my %set = parse_difftree_raw_line($line);
5822                         if (defined $set{'commit'}) {
5823                                 # finish previous commit
5824                                 if (%co) {
5825                                         print "</td>\n" .
5826                                               "<td class=\"link\">" .
5827                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5828                                               " | " .
5829                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5830                                         print "</td>\n" .
5831                                               "</tr>\n";
5832                                 }
5833
5834                                 if ($alternate) {
5835                                         print "<tr class=\"dark\">\n";
5836                                 } else {
5837                                         print "<tr class=\"light\">\n";
5838                                 }
5839                                 $alternate ^= 1;
5840                                 %co = parse_commit($set{'commit'});
5841                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5842                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5843                                       "<td><i>$author</i></td>\n" .
5844                                       "<td>" .
5845                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5846                                               -class => "list subject"},
5847                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5848                         } elsif (defined $set{'to_id'}) {
5849                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5850
5851                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5852                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5853                                               -class => "list"},
5854                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5855                                       "<br/>\n";
5856                         }
5857                 }
5858                 close $fd;
5859
5860                 # finish last commit (warning: repetition!)
5861                 if (%co) {
5862                         print "</td>\n" .
5863                               "<td class=\"link\">" .
5864                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5865                               " | " .
5866                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5867                         print "</td>\n" .
5868                               "</tr>\n";
5869                 }
5870
5871                 print "</table>\n";
5872         }
5873
5874         if ($searchtype eq 'grep') {
5875                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5876                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5877
5878                 print "<table class=\"grep_search\">\n";
5879                 my $alternate = 1;
5880                 my $matches = 0;
5881                 $/ = "\n";
5882                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5883                         $search_use_regexp ? ('-E', '-i') : '-F',
5884                         $searchtext, $co{'tree'};
5885                 my $lastfile = '';
5886                 while (my $line = <$fd>) {
5887                         chomp $line;
5888                         my ($file, $lno, $ltext, $binary);
5889                         last if ($matches++ > 1000);
5890                         if ($line =~ /^Binary file (.+) matches$/) {
5891                                 $file = $1;
5892                                 $binary = 1;
5893                         } else {
5894                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5895                         }
5896                         if ($file ne $lastfile) {
5897                                 $lastfile and print "</td></tr>\n";
5898                                 if ($alternate++) {
5899                                         print "<tr class=\"dark\">\n";
5900                                 } else {
5901                                         print "<tr class=\"light\">\n";
5902                                 }
5903                                 print "<td class=\"list\">".
5904                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5905                                                                file_name=>"$file"),
5906                                                 -class => "list"}, esc_path($file));
5907                                 print "</td><td>\n";
5908                                 $lastfile = $file;
5909                         }
5910                         if ($binary) {
5911                                 print "<div class=\"binary\">Binary file</div>\n";
5912                         } else {
5913                                 $ltext = untabify($ltext);
5914                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5915                                         $ltext = esc_html($1, -nbsp=>1);
5916                                         $ltext .= '<span class="match">';
5917                                         $ltext .= esc_html($2, -nbsp=>1);
5918                                         $ltext .= '</span>';
5919                                         $ltext .= esc_html($3, -nbsp=>1);
5920                                 } else {
5921                                         $ltext = esc_html($ltext, -nbsp=>1);
5922                                 }
5923                                 print "<div class=\"pre\">" .
5924                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5925                                                                file_name=>"$file").'#l'.$lno,
5926                                                 -class => "linenr"}, sprintf('%4i', $lno))
5927                                         . ' ' .  $ltext . "</div>\n";
5928                         }
5929                 }
5930                 if ($lastfile) {
5931                         print "</td></tr>\n";
5932                         if ($matches > 1000) {
5933                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5934                         }
5935                 } else {
5936                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5937                 }
5938                 close $fd;
5939
5940                 print "</table>\n";
5941         }
5942         git_footer_html();
5943 }
5944
5945 sub git_search_help {
5946         git_header_html();
5947         git_print_page_nav('','', $hash,$hash,$hash);
5948         print <<EOT;
5949 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5950 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5951 the pattern entered is recognized as the POSIX extended
5952 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5953 insensitive).</p>
5954 <dl>
5955 <dt><b>commit</b></dt>
5956 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5957 EOT
5958         my $have_grep = gitweb_check_feature('grep');
5959         if ($have_grep) {
5960                 print <<EOT;
5961 <dt><b>grep</b></dt>
5962 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5963     a different one) are searched for the given pattern. On large trees, this search can take
5964 a while and put some strain on the server, so please use it with some consideration. Note that
5965 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5966 case-sensitive.</dd>
5967 EOT
5968         }
5969         print <<EOT;
5970 <dt><b>author</b></dt>
5971 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5972 <dt><b>committer</b></dt>
5973 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5974 EOT
5975         my $have_pickaxe = gitweb_check_feature('pickaxe');
5976         if ($have_pickaxe) {
5977                 print <<EOT;
5978 <dt><b>pickaxe</b></dt>
5979 <dd>All commits that caused the string to appear or disappear from any file (changes that
5980 added, removed or "modified" the string) will be listed. This search can take a while and
5981 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5982 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5983 EOT
5984         }
5985         print "</dl>\n";
5986         git_footer_html();
5987 }
5988
5989 sub git_shortlog {
5990         my $head = git_get_head_hash($project);
5991         if (!defined $hash) {
5992                 $hash = $head;
5993         }
5994         if (!defined $page) {
5995                 $page = 0;
5996         }
5997         my $refs = git_get_references();
5998
5999         my $commit_hash = $hash;
6000         if (defined $hash_parent) {
6001                 $commit_hash = "$hash_parent..$hash";
6002         }
6003         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6004
6005         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6006         my $next_link = '';
6007         if ($#commitlist >= 100) {
6008                 $next_link =
6009                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6010                                  -accesskey => "n", -title => "Alt-n"}, "next");
6011         }
6012         my $patch_max = gitweb_check_feature('patches');
6013         if ($patch_max) {
6014                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6015                         $paging_nav .= " &sdot; " .
6016                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6017                                         "patches");
6018                 }
6019         }
6020
6021         git_header_html();
6022         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6023         git_print_header_div('summary', $project);
6024
6025         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6026
6027         git_footer_html();
6028 }
6029
6030 ## ......................................................................
6031 ## feeds (RSS, Atom; OPML)
6032
6033 sub git_feed {
6034         my $format = shift || 'atom';
6035         my $have_blame = gitweb_check_feature('blame');
6036
6037         # Atom: http://www.atomenabled.org/developers/syndication/
6038         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6039         if ($format ne 'rss' && $format ne 'atom') {
6040                 die_error(400, "Unknown web feed format");
6041         }
6042
6043         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6044         my $head = $hash || 'HEAD';
6045         my @commitlist = parse_commits($head, 150, 0, $file_name);
6046
6047         my %latest_commit;
6048         my %latest_date;
6049         my $content_type = "application/$format+xml";
6050         if (defined $cgi->http('HTTP_ACCEPT') &&
6051                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6052                 # browser (feed reader) prefers text/xml
6053                 $content_type = 'text/xml';
6054         }
6055         if (defined($commitlist[0])) {
6056                 %latest_commit = %{$commitlist[0]};
6057                 my $latest_epoch = $latest_commit{'committer_epoch'};
6058                 %latest_date   = parse_date($latest_epoch);
6059                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6060                 if (defined $if_modified) {
6061                         my $since;
6062                         if (eval { require HTTP::Date; 1; }) {
6063                                 $since = HTTP::Date::str2time($if_modified);
6064                         } elsif (eval { require Time::ParseDate; 1; }) {
6065                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6066                         }
6067                         if (defined $since && $latest_epoch <= $since) {
6068                                 print $cgi->header(
6069                                         -type => $content_type,
6070                                         -charset => 'utf-8',
6071                                         -last_modified => $latest_date{'rfc2822'},
6072                                         -status => '304 Not Modified');
6073                                 return;
6074                         }
6075                 }
6076                 print $cgi->header(
6077                         -type => $content_type,
6078                         -charset => 'utf-8',
6079                         -last_modified => $latest_date{'rfc2822'});
6080         } else {
6081                 print $cgi->header(
6082                         -type => $content_type,
6083                         -charset => 'utf-8');
6084         }
6085
6086         # Optimization: skip generating the body if client asks only
6087         # for Last-Modified date.
6088         return if ($cgi->request_method() eq 'HEAD');
6089
6090         # header variables
6091         my $title = "$site_name - $project/$action";
6092         my $feed_type = 'log';
6093         if (defined $hash) {
6094                 $title .= " - '$hash'";
6095                 $feed_type = 'branch log';
6096                 if (defined $file_name) {
6097                         $title .= " :: $file_name";
6098                         $feed_type = 'history';
6099                 }
6100         } elsif (defined $file_name) {
6101                 $title .= " - $file_name";
6102                 $feed_type = 'history';
6103         }
6104         $title .= " $feed_type";
6105         my $descr = git_get_project_description($project);
6106         if (defined $descr) {
6107                 $descr = esc_html($descr);
6108         } else {
6109                 $descr = "$project " .
6110                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6111                          " feed";
6112         }
6113         my $owner = git_get_project_owner($project);
6114         $owner = esc_html($owner);
6115
6116         #header
6117         my $alt_url;
6118         if (defined $file_name) {
6119                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6120         } elsif (defined $hash) {
6121                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6122         } else {
6123                 $alt_url = href(-full=>1, action=>"summary");
6124         }
6125         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6126         if ($format eq 'rss') {
6127                 print <<XML;
6128 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6129 <channel>
6130 XML
6131                 print "<title>$title</title>\n" .
6132                       "<link>$alt_url</link>\n" .
6133                       "<description>$descr</description>\n" .
6134                       "<language>en</language>\n" .
6135                       # project owner is responsible for 'editorial' content
6136                       "<managingEditor>$owner</managingEditor>\n";
6137                 if (defined $logo || defined $favicon) {
6138                         # prefer the logo to the favicon, since RSS
6139                         # doesn't allow both
6140                         my $img = esc_url($logo || $favicon);
6141                         print "<image>\n" .
6142                               "<url>$img</url>\n" .
6143                               "<title>$title</title>\n" .
6144                               "<link>$alt_url</link>\n" .
6145                               "</image>\n";
6146                 }
6147                 if (%latest_date) {
6148                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6149                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6150                 }
6151                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6152         } elsif ($format eq 'atom') {
6153                 print <<XML;
6154 <feed xmlns="http://www.w3.org/2005/Atom">
6155 XML
6156                 print "<title>$title</title>\n" .
6157                       "<subtitle>$descr</subtitle>\n" .
6158                       '<link rel="alternate" type="text/html" href="' .
6159                       $alt_url . '" />' . "\n" .
6160                       '<link rel="self" type="' . $content_type . '" href="' .
6161                       $cgi->self_url() . '" />' . "\n" .
6162                       "<id>" . href(-full=>1) . "</id>\n" .
6163                       # use project owner for feed author
6164                       "<author><name>$owner</name></author>\n";
6165                 if (defined $favicon) {
6166                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6167                 }
6168                 if (defined $logo_url) {
6169                         # not twice as wide as tall: 72 x 27 pixels
6170                         print "<logo>" . esc_url($logo) . "</logo>\n";
6171                 }
6172                 if (! %latest_date) {
6173                         # dummy date to keep the feed valid until commits trickle in:
6174                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6175                 } else {
6176                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6177                 }
6178                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6179         }
6180
6181         # contents
6182         for (my $i = 0; $i <= $#commitlist; $i++) {
6183                 my %co = %{$commitlist[$i]};
6184                 my $commit = $co{'id'};
6185                 # we read 150, we always show 30 and the ones more recent than 48 hours
6186                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6187                         last;
6188                 }
6189                 my %cd = parse_date($co{'author_epoch'});
6190
6191                 # get list of changed files
6192                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6193                         $co{'parent'} || "--root",
6194                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6195                         or next;
6196                 my @difftree = map { chomp; $_ } <$fd>;
6197                 close $fd
6198                         or next;
6199
6200                 # print element (entry, item)
6201                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6202                 if ($format eq 'rss') {
6203                         print "<item>\n" .
6204                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6205                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6206                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6207                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6208                               "<link>$co_url</link>\n" .
6209                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6210                               "<content:encoded>" .
6211                               "<![CDATA[\n";
6212                 } elsif ($format eq 'atom') {
6213                         print "<entry>\n" .
6214                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6215                               "<updated>$cd{'iso-8601'}</updated>\n" .
6216                               "<author>\n" .
6217                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6218                         if ($co{'author_email'}) {
6219                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6220                         }
6221                         print "</author>\n" .
6222                               # use committer for contributor
6223                               "<contributor>\n" .
6224                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6225                         if ($co{'committer_email'}) {
6226                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6227                         }
6228                         print "</contributor>\n" .
6229                               "<published>$cd{'iso-8601'}</published>\n" .
6230                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6231                               "<id>$co_url</id>\n" .
6232                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6233                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6234                 }
6235                 my $comment = $co{'comment'};
6236                 print "<pre>\n";
6237                 foreach my $line (@$comment) {
6238                         $line = esc_html($line);
6239                         print "$line\n";
6240                 }
6241                 print "</pre><ul>\n";
6242                 foreach my $difftree_line (@difftree) {
6243                         my %difftree = parse_difftree_raw_line($difftree_line);
6244                         next if !$difftree{'from_id'};
6245
6246                         my $file = $difftree{'file'} || $difftree{'to_file'};
6247
6248                         print "<li>" .
6249                               "[" .
6250                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6251                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6252                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6253                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6254                                       -title => "diff"}, 'D');
6255                         if ($have_blame) {
6256                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6257                                                              file_name=>$file, hash_base=>$commit),
6258                                               -title => "blame"}, 'B');
6259                         }
6260                         # if this is not a feed of a file history
6261                         if (!defined $file_name || $file_name ne $file) {
6262                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6263                                                              file_name=>$file, hash=>$commit),
6264                                               -title => "history"}, 'H');
6265                         }
6266                         $file = esc_path($file);
6267                         print "] ".
6268                               "$file</li>\n";
6269                 }
6270                 if ($format eq 'rss') {
6271                         print "</ul>]]>\n" .
6272                               "</content:encoded>\n" .
6273                               "</item>\n";
6274                 } elsif ($format eq 'atom') {
6275                         print "</ul>\n</div>\n" .
6276                               "</content>\n" .
6277                               "</entry>\n";
6278                 }
6279         }
6280
6281         # end of feed
6282         if ($format eq 'rss') {
6283                 print "</channel>\n</rss>\n";
6284         }       elsif ($format eq 'atom') {
6285                 print "</feed>\n";
6286         }
6287 }
6288
6289 sub git_rss {
6290         git_feed('rss');
6291 }
6292
6293 sub git_atom {
6294         git_feed('atom');
6295 }
6296
6297 sub git_opml {
6298         my @list = git_get_projects_list();
6299
6300         print $cgi->header(
6301                 -type => 'text/xml',
6302                 -charset => 'utf-8',
6303                 -content_disposition => 'inline; filename="opml.xml"');
6304
6305         print <<XML;
6306 <?xml version="1.0" encoding="utf-8"?>
6307 <opml version="1.0">
6308 <head>
6309   <title>$site_name OPML Export</title>
6310 </head>
6311 <body>
6312 <outline text="git RSS feeds">
6313 XML
6314
6315         foreach my $pr (@list) {
6316                 my %proj = %$pr;
6317                 my $head = git_get_head_hash($proj{'path'});
6318                 if (!defined $head) {
6319                         next;
6320                 }
6321                 $git_dir = "$projectroot/$proj{'path'}";
6322                 my %co = parse_commit($head);
6323                 if (!%co) {
6324                         next;
6325                 }
6326
6327                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6328                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6329                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6330                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6331         }
6332         print <<XML;
6333 </outline>
6334 </body>
6335 </opml>
6336 XML
6337 }