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 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64
  65 # URI of GIT logo (72x27 size)
  66 our $logo = "++GITWEB_LOGO++";
  67 # URI of GIT favicon, assumed to be image/png type
  68 our $favicon = "++GITWEB_FAVICON++";
  69
  70 # URI and label (title) of GIT logo link
  71 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  72 #our $logo_label = "git documentation";
  73 our $logo_url = "http://git.or.cz/";
  74 our $logo_label = "git homepage";
  75
  76 # source of projects list
  77 our $projects_list = "++GITWEB_LIST++";
  78
  79 # the width (in characters) of the projects list "Description" column
  80 our $projects_list_description_width = 25;
  81
  82 # default order of projects list
  83 # valid values are none, project, descr, owner, and age
  84 our $default_projects_order = "project";
  85
  86 # show repository only if this file exists
  87 # (only effective if this variable evaluates to true)
  88 our $export_ok = "++GITWEB_EXPORT_OK++";
  89
  90 # only allow viewing of repositories also shown on the overview page
  91 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  92
  93 # list of git base URLs used for URL to where fetch project from,
  94 # i.e. full URL is "$git_base_url/$project"
  95 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  96
  97 # default blob_plain mimetype and default charset for text/plain blob
  98 our $default_blob_plain_mimetype = 'text/plain';
  99 our $default_text_plain_charset  = undef;
 100
 101 # file to use for guessing MIME types before trying /etc/mime.types
 102 # (relative to the current git repository)
 103 our $mimetypes_file = undef;
 104
 105 # assume this charset if line contains non-UTF-8 characters;
 106 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 107 # for which encoding all byte sequences are valid, for example
 108 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 109 # could be even 'utf-8' for the old behavior)
 110 our $fallback_encoding = 'latin1';
 111
 112 # rename detection options for git-diff and git-diff-tree
 113 # - default is '-M', with the cost proportional to
 114 #   (number of removed files) * (number of new files).
 115 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 116 #   (number of changed files + number of removed files) * (number of new files)
 117 # - even more costly is '-C', '--find-copies-harder' with cost
 118 #   (number of files in the original tree) * (number of new files)
 119 # - one might want to include '-B' option, e.g. '-B', '-M'
 120 our @diff_opts = ('-M'); # taken from git_commit
 121
 122 # information about snapshot formats that gitweb is capable of serving
 123 our %known_snapshot_formats = (
 124         # name => {
 125         #       'display' => display name,
 126         #       'type' => mime type,
 127         #       'suffix' => filename suffix,
 128         #       'format' => --format for git-archive,
 129         #       'compressor' => [compressor command and arguments]
 130         #                       (array reference, optional)}
 131         #
 132         'tgz' => {
 133                 'display' => 'tar.gz',
 134                 'type' => 'application/x-gzip',
 135                 'suffix' => '.tar.gz',
 136                 'format' => 'tar',
 137                 'compressor' => ['gzip']},
 138
 139         'tbz2' => {
 140                 'display' => 'tar.bz2',
 141                 'type' => 'application/x-bzip2',
 142                 'suffix' => '.tar.bz2',
 143                 'format' => 'tar',
 144                 'compressor' => ['bzip2']},
 145
 146         'zip' => {
 147                 'display' => 'zip',
 148                 'type' => 'application/x-zip',
 149                 'suffix' => '.zip',
 150                 'format' => 'zip'},
 151 );
 152
 153 # Aliases so we understand old gitweb.snapshot values in repository
 154 # configuration.
 155 our %known_snapshot_format_aliases = (
 156         'gzip'  => 'tgz',
 157         'bzip2' => 'tbz2',
 158
 159         # backward compatibility: legacy gitweb config support
 160         'x-gzip' => undef, 'gz' => undef,
 161         'x-bzip2' => undef, 'bz2' => undef,
 162         'x-zip' => undef, '' => undef,
 163 );
 164
 165 # You define site-wide feature defaults here; override them with
 166 # $GITWEB_CONFIG as necessary.
 167 our %feature = (
 168         # feature => {
 169         #       'sub' => feature-sub (subroutine),
 170         #       'override' => allow-override (boolean),
 171         #       'default' => [ default options...] (array reference)}
 172         #
 173         # if feature is overridable (it means that allow-override has true value),
 174         # then feature-sub will be called with default options as parameters;
 175         # return value of feature-sub indicates if to enable specified feature
 176         #
 177         # if there is no 'sub' key (no feature-sub), then feature cannot be
 178         # overriden
 179         #
 180         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 181
 182         # Enable the 'blame' blob view, showing the last commit that modified
 183         # each line in the file. This can be very CPU-intensive.
 184
 185         # To enable system wide have in $GITWEB_CONFIG
 186         # $feature{'blame'}{'default'} = [1];
 187         # To have project specific config enable override in $GITWEB_CONFIG
 188         # $feature{'blame'}{'override'} = 1;
 189         # and in project config gitweb.blame = 0|1;
 190         'blame' => {
 191                 'sub' => \&feature_blame,
 192                 'override' => 0,
 193                 'default' => [0]},
 194
 195         # Enable the 'snapshot' link, providing a compressed archive of any
 196         # tree. This can potentially generate high traffic if you have large
 197         # project.
 198
 199         # Value is a list of formats defined in %known_snapshot_formats that
 200         # you wish to offer.
 201         # To disable system wide have in $GITWEB_CONFIG
 202         # $feature{'snapshot'}{'default'} = [];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'snapshot'}{'override'} = 1;
 205         # and in project config, a comma-separated list of formats or "none"
 206         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 207         'snapshot' => {
 208                 'sub' => \&feature_snapshot,
 209                 'override' => 0,
 210                 'default' => ['tgz']},
 211
 212         # Enable text search, which will list the commits which match author,
 213         # committer or commit text to a given string.  Enabled by default.
 214         # Project specific override is not supported.
 215         'search' => {
 216                 'override' => 0,
 217                 'default' => [1]},
 218
 219         # Enable grep search, which will list the files in currently selected
 220         # tree containing the given string. Enabled by default. This can be
 221         # potentially CPU-intensive, of course.
 222
 223         # To enable system wide have in $GITWEB_CONFIG
 224         # $feature{'grep'}{'default'} = [1];
 225         # To have project specific config enable override in $GITWEB_CONFIG
 226         # $feature{'grep'}{'override'} = 1;
 227         # and in project config gitweb.grep = 0|1;
 228         'grep' => {
 229                 'override' => 0,
 230                 'default' => [1]},
 231
 232         # Enable the pickaxe search, which will list the commits that modified
 233         # a given string in a file. This can be practical and quite faster
 234         # alternative to 'blame', but still potentially CPU-intensive.
 235
 236         # To enable system wide have in $GITWEB_CONFIG
 237         # $feature{'pickaxe'}{'default'} = [1];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'pickaxe'}{'override'} = 1;
 240         # and in project config gitweb.pickaxe = 0|1;
 241         'pickaxe' => {
 242                 'sub' => \&feature_pickaxe,
 243                 'override' => 0,
 244                 'default' => [1]},
 245
 246         # Make gitweb use an alternative format of the URLs which can be
 247         # more readable and natural-looking: project name is embedded
 248         # directly in the path and the query string contains other
 249         # auxiliary information. All gitweb installations recognize
 250         # URL in either format; this configures in which formats gitweb
 251         # generates links.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pathinfo'}{'default'} = [1];
 255         # Project specific override is not supported.
 256
 257         # Note that you will need to change the default location of CSS,
 258         # favicon, logo and possibly other files to an absolute URL. Also,
 259         # if gitweb.cgi serves as your indexfile, you will need to force
 260         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 261         'pathinfo' => {
 262                 'override' => 0,
 263                 'default' => [0]},
 264
 265         # Make gitweb consider projects in project root subdirectories
 266         # to be forks of existing projects. Given project $projname.git,
 267         # projects matching $projname/*.git will not be shown in the main
 268         # projects list, instead a '+' mark will be added to $projname
 269         # there and a 'forks' view will be enabled for the project, listing
 270         # all the forks. If project list is taken from a file, forks have
 271         # to be listed after the main project.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'forks'}{'default'} = [1];
 275         # Project specific override is not supported.
 276         'forks' => {
 277                 'override' => 0,
 278                 'default' => [0]},
 279 );
 280
 281 sub gitweb_check_feature {
 282         my ($name) = @_;
 283         return unless exists $feature{$name};
 284         my ($sub, $override, @defaults) = (
 285                 $feature{$name}{'sub'},
 286                 $feature{$name}{'override'},
 287                 @{$feature{$name}{'default'}});
 288         if (!$override) { return @defaults; }
 289         if (!defined $sub) {
 290                 warn "feature $name is not overrideable";
 291                 return @defaults;
 292         }
 293         return $sub->(@defaults);
 294 }
 295
 296 sub feature_blame {
 297         my ($val) = git_get_project_config('blame', '--bool');
 298
 299         if ($val eq 'true') {
 300                 return 1;
 301         } elsif ($val eq 'false') {
 302                 return 0;
 303         }
 304
 305         return $_[0];
 306 }
 307
 308 sub feature_snapshot {
 309         my (@fmts) = @_;
 310
 311         my ($val) = git_get_project_config('snapshot');
 312
 313         if ($val) {
 314                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 # process alternate names for backward compatibility
 361 # filter out unsupported (unknown) snapshot formats
 362 sub filter_snapshot_fmts {
 363         my @fmts = @_;
 364
 365         @fmts = map {
 366                 exists $known_snapshot_format_aliases{$_} ?
 367                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 368         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 369
 370 }
 371
 372 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 373 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 374
 375 # version of the core git binary
 376 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 377
 378 $projects_list ||= $projectroot;
 379
 380 # ======================================================================
 381 # input validation and dispatch
 382 our $action = $cgi->param('a');
 383 if (defined $action) {
 384         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 385                 die_error(undef, "Invalid action parameter");
 386         }
 387 }
 388
 389 # parameters which are pathnames
 390 our $project = $cgi->param('p');
 391 if (defined $project) {
 392         if (!validate_pathname($project) ||
 393             !(-d "$projectroot/$project") ||
 394             !check_head_link("$projectroot/$project") ||
 395             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 396             ($strict_export && !project_in_list($project))) {
 397                 undef $project;
 398                 die_error(undef, "No such project");
 399         }
 400 }
 401
 402 our $file_name = $cgi->param('f');
 403 if (defined $file_name) {
 404         if (!validate_pathname($file_name)) {
 405                 die_error(undef, "Invalid file parameter");
 406         }
 407 }
 408
 409 our $file_parent = $cgi->param('fp');
 410 if (defined $file_parent) {
 411         if (!validate_pathname($file_parent)) {
 412                 die_error(undef, "Invalid file parent parameter");
 413         }
 414 }
 415
 416 # parameters which are refnames
 417 our $hash = $cgi->param('h');
 418 if (defined $hash) {
 419         if (!validate_refname($hash)) {
 420                 die_error(undef, "Invalid hash parameter");
 421         }
 422 }
 423
 424 our $hash_parent = $cgi->param('hp');
 425 if (defined $hash_parent) {
 426         if (!validate_refname($hash_parent)) {
 427                 die_error(undef, "Invalid hash parent parameter");
 428         }
 429 }
 430
 431 our $hash_base = $cgi->param('hb');
 432 if (defined $hash_base) {
 433         if (!validate_refname($hash_base)) {
 434                 die_error(undef, "Invalid hash base parameter");
 435         }
 436 }
 437
 438 my %allowed_options = (
 439         "--no-merges" => [ qw(rss atom log shortlog history) ],
 440 );
 441
 442 our @extra_options = $cgi->param('opt');
 443 if (defined @extra_options) {
 444         foreach my $opt (@extra_options) {
 445                 if (not exists $allowed_options{$opt}) {
 446                         die_error(undef, "Invalid option parameter");
 447                 }
 448                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 449                         die_error(undef, "Invalid option parameter for this action");
 450                 }
 451         }
 452 }
 453
 454 our $hash_parent_base = $cgi->param('hpb');
 455 if (defined $hash_parent_base) {
 456         if (!validate_refname($hash_parent_base)) {
 457                 die_error(undef, "Invalid hash parent base parameter");
 458         }
 459 }
 460
 461 # other parameters
 462 our $page = $cgi->param('pg');
 463 if (defined $page) {
 464         if ($page =~ m/[^0-9]/) {
 465                 die_error(undef, "Invalid page parameter");
 466         }
 467 }
 468
 469 our $searchtype = $cgi->param('st');
 470 if (defined $searchtype) {
 471         if ($searchtype =~ m/[^a-z]/) {
 472                 die_error(undef, "Invalid searchtype parameter");
 473         }
 474 }
 475
 476 our $searchtext = $cgi->param('s');
 477 our $search_regexp;
 478 if (defined $searchtext) {
 479         if (length($searchtext) < 2) {
 480                 die_error(undef, "At least two characters are required for search parameter");
 481         }
 482         $search_regexp = quotemeta $searchtext;
 483 }
 484
 485 # now read PATH_INFO and use it as alternative to parameters
 486 sub evaluate_path_info {
 487         return if defined $project;
 488         my $path_info = $ENV{"PATH_INFO"};
 489         return if !$path_info;
 490         $path_info =~ s,^/+,,;
 491         return if !$path_info;
 492         # find which part of PATH_INFO is project
 493         $project = $path_info;
 494         $project =~ s,/+$,,;
 495         while ($project && !check_head_link("$projectroot/$project")) {
 496                 $project =~ s,/*[^/]*$,,;
 497         }
 498         # validate project
 499         $project = validate_pathname($project);
 500         if (!$project ||
 501             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 502             ($strict_export && !project_in_list($project))) {
 503                 undef $project;
 504                 return;
 505         }
 506         # do not change any parameters if an action is given using the query string
 507         return if $action;
 508         $path_info =~ s,^$project/*,,;
 509         my ($refname, $pathname) = split(/:/, $path_info, 2);
 510         if (defined $pathname) {
 511                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 512                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 513                 $pathname =~ s,^/+,,;
 514                 if (!$pathname || substr($pathname, -1) eq "/") {
 515                         $action  ||= "tree";
 516                         $pathname =~ s,/$,,;
 517                 } else {
 518                         $action  ||= "blob_plain";
 519                 }
 520                 $hash_base ||= validate_refname($refname);
 521                 $file_name ||= validate_pathname($pathname);
 522         } elsif (defined $refname) {
 523                 # we got "project.git/branch"
 524                 $action ||= "shortlog";
 525                 $hash   ||= validate_refname($refname);
 526         }
 527 }
 528 evaluate_path_info();
 529
 530 # path to the current git repository
 531 our $git_dir;
 532 $git_dir = "$projectroot/$project" if $project;
 533
 534 # dispatch
 535 my %actions = (
 536         "blame" => \&git_blame2,
 537         "blobdiff" => \&git_blobdiff,
 538         "blobdiff_plain" => \&git_blobdiff_plain,
 539         "blob" => \&git_blob,
 540         "blob_plain" => \&git_blob_plain,
 541         "commitdiff" => \&git_commitdiff,
 542         "commitdiff_plain" => \&git_commitdiff_plain,
 543         "commit" => \&git_commit,
 544         "forks" => \&git_forks,
 545         "heads" => \&git_heads,
 546         "history" => \&git_history,
 547         "log" => \&git_log,
 548         "rss" => \&git_rss,
 549         "atom" => \&git_atom,
 550         "search" => \&git_search,
 551         "search_help" => \&git_search_help,
 552         "shortlog" => \&git_shortlog,
 553         "summary" => \&git_summary,
 554         "tag" => \&git_tag,
 555         "tags" => \&git_tags,
 556         "tree" => \&git_tree,
 557         "snapshot" => \&git_snapshot,
 558         "object" => \&git_object,
 559         # those below don't need $project
 560         "opml" => \&git_opml,
 561         "project_list" => \&git_project_list,
 562         "project_index" => \&git_project_index,
 563 );
 564
 565 if (!defined $action) {
 566         if (defined $hash) {
 567                 $action = git_get_type($hash);
 568         } elsif (defined $hash_base && defined $file_name) {
 569                 $action = git_get_type("$hash_base:$file_name");
 570         } elsif (defined $project) {
 571                 $action = 'summary';
 572         } else {
 573                 $action = 'project_list';
 574         }
 575 }
 576 if (!defined($actions{$action})) {
 577         die_error(undef, "Unknown action");
 578 }
 579 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 580     !$project) {
 581         die_error(undef, "Project needed");
 582 }
 583 $actions{$action}->();
 584 exit;
 585
 586 ## ======================================================================
 587 ## action links
 588
 589 sub href(%) {
 590         my %params = @_;
 591         # default is to use -absolute url() i.e. $my_uri
 592         my $href = $params{-full} ? $my_url : $my_uri;
 593
 594         # XXX: Warning: If you touch this, check the search form for updating,
 595         # too.
 596
 597         my @mapping = (
 598                 project => "p",
 599                 action => "a",
 600                 file_name => "f",
 601                 file_parent => "fp",
 602                 hash => "h",
 603                 hash_parent => "hp",
 604                 hash_base => "hb",
 605                 hash_parent_base => "hpb",
 606                 page => "pg",
 607                 order => "o",
 608                 searchtext => "s",
 609                 searchtype => "st",
 610                 snapshot_format => "sf",
 611                 extra_options => "opt",
 612         );
 613         my %mapping = @mapping;
 614
 615         $params{'project'} = $project unless exists $params{'project'};
 616
 617         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 618         if ($use_pathinfo) {
 619                 # use PATH_INFO for project name
 620                 $href .= "/$params{'project'}" if defined $params{'project'};
 621                 delete $params{'project'};
 622
 623                 # Summary just uses the project path URL
 624                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 625                         delete $params{'action'};
 626                 }
 627         }
 628
 629         # now encode the parameters explicitly
 630         my @result = ();
 631         for (my $i = 0; $i < @mapping; $i += 2) {
 632                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 633                 if (defined $params{$name}) {
 634                         if (ref($params{$name}) eq "ARRAY") {
 635                                 foreach my $par (@{$params{$name}}) {
 636                                         push @result, $symbol . "=" . esc_param($par);
 637                                 }
 638                         } else {
 639                                 push @result, $symbol . "=" . esc_param($params{$name});
 640                         }
 641                 }
 642         }
 643         $href .= "?" . join(';', @result) if scalar @result;
 644
 645         return $href;
 646 }
 647
 648
 649 ## ======================================================================
 650 ## validation, quoting/unquoting and escaping
 651
 652 sub validate_pathname {
 653         my $input = shift || return undef;
 654
 655         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 656         # at the beginning, at the end, and between slashes.
 657         # also this catches doubled slashes
 658         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 659                 return undef;
 660         }
 661         # no null characters
 662         if ($input =~ m!\0!) {
 663                 return undef;
 664         }
 665         return $input;
 666 }
 667
 668 sub validate_refname {
 669         my $input = shift || return undef;
 670
 671         # textual hashes are O.K.
 672         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 673                 return $input;
 674         }
 675         # it must be correct pathname
 676         $input = validate_pathname($input)
 677                 or return undef;
 678         # restrictions on ref name according to git-check-ref-format
 679         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 680                 return undef;
 681         }
 682         return $input;
 683 }
 684
 685 # decode sequences of octets in utf8 into Perl's internal form,
 686 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 687 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 688 sub to_utf8 {
 689         my $str = shift;
 690         my $res;
 691         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 692         if (defined $res) {
 693                 return $res;
 694         } else {
 695                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 696         }
 697 }
 698
 699 # quote unsafe chars, but keep the slash, even when it's not
 700 # correct, but quoted slashes look too horrible in bookmarks
 701 sub esc_param {
 702         my $str = shift;
 703         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 704         $str =~ s/\+/%2B/g;
 705         $str =~ s/ /\+/g;
 706         return $str;
 707 }
 708
 709 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 710 sub esc_url {
 711         my $str = shift;
 712         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 713         $str =~ s/\+/%2B/g;
 714         $str =~ s/ /\+/g;
 715         return $str;
 716 }
 717
 718 # replace invalid utf8 character with SUBSTITUTION sequence
 719 sub esc_html ($;%) {
 720         my $str = shift;
 721         my %opts = @_;
 722
 723         $str = to_utf8($str);
 724         $str = $cgi->escapeHTML($str);
 725         if ($opts{'-nbsp'}) {
 726                 $str =~ s/ /&nbsp;/g;
 727         }
 728         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 729         return $str;
 730 }
 731
 732 # quote control characters and escape filename to HTML
 733 sub esc_path {
 734         my $str = shift;
 735         my %opts = @_;
 736
 737         $str = to_utf8($str);
 738         $str = $cgi->escapeHTML($str);
 739         if ($opts{'-nbsp'}) {
 740                 $str =~ s/ /&nbsp;/g;
 741         }
 742         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 743         return $str;
 744 }
 745
 746 # Make control characters "printable", using character escape codes (CEC)
 747 sub quot_cec {
 748         my $cntrl = shift;
 749         my %es = ( # character escape codes, aka escape sequences
 750                    "\t" => '\t',   # tab            (HT)
 751                    "\n" => '\n',   # line feed      (LF)
 752                    "\r" => '\r',   # carrige return (CR)
 753                    "\f" => '\f',   # form feed      (FF)
 754                    "\b" => '\b',   # backspace      (BS)
 755                    "\a" => '\a',   # alarm (bell)   (BEL)
 756                    "\e" => '\e',   # escape         (ESC)
 757                    "\013" => '\v', # vertical tab   (VT)
 758                    "\000" => '\0', # nul character  (NUL)
 759                    );
 760         my $chr = ( (exists $es{$cntrl})
 761                     ? $es{$cntrl}
 762                     : sprintf('\%03o', ord($cntrl)) );
 763         return "<span class=\"cntrl\">$chr</span>";
 764 }
 765
 766 # Alternatively use unicode control pictures codepoints,
 767 # Unicode "printable representation" (PR)
 768 sub quot_upr {
 769         my $cntrl = shift;
 770         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 771         return "<span class=\"cntrl\">$chr</span>";
 772 }
 773
 774 # git may return quoted and escaped filenames
 775 sub unquote {
 776         my $str = shift;
 777
 778         sub unq {
 779                 my $seq = shift;
 780                 my %es = ( # character escape codes, aka escape sequences
 781                         't' => "\t",   # tab            (HT, TAB)
 782                         'n' => "\n",   # newline        (NL)
 783                         'r' => "\r",   # return         (CR)
 784                         'f' => "\f",   # form feed      (FF)
 785                         'b' => "\b",   # backspace      (BS)
 786                         'a' => "\a",   # alarm (bell)   (BEL)
 787                         'e' => "\e",   # escape         (ESC)
 788                         'v' => "\013", # vertical tab   (VT)
 789                 );
 790
 791                 if ($seq =~ m/^[0-7]{1,3}$/) {
 792                         # octal char sequence
 793                         return chr(oct($seq));
 794                 } elsif (exists $es{$seq}) {
 795                         # C escape sequence, aka character escape code
 796                         return $es{$seq}
 797                 }
 798                 # quoted ordinary character
 799                 return $seq;
 800         }
 801
 802         if ($str =~ m/^"(.*)"$/) {
 803                 # needs unquoting
 804                 $str = $1;
 805                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 806         }
 807         return $str;
 808 }
 809
 810 # escape tabs (convert tabs to spaces)
 811 sub untabify {
 812         my $line = shift;
 813
 814         while ((my $pos = index($line, "\t")) != -1) {
 815                 if (my $count = (8 - ($pos % 8))) {
 816                         my $spaces = ' ' x $count;
 817                         $line =~ s/\t/$spaces/;
 818                 }
 819         }
 820
 821         return $line;
 822 }
 823
 824 sub project_in_list {
 825         my $project = shift;
 826         my @list = git_get_projects_list();
 827         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 828 }
 829
 830 ## ----------------------------------------------------------------------
 831 ## HTML aware string manipulation
 832
 833 sub chop_str {
 834         my $str = shift;
 835         my $len = shift;
 836         my $add_len = shift || 10;
 837
 838         # allow only $len chars, but don't cut a word if it would fit in $add_len
 839         # if it doesn't fit, cut it if it's still longer than the dots we would add
 840         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 841         my $body = $1;
 842         my $tail = $2;
 843         if (length($tail) > 4) {
 844                 $tail = " ...";
 845                 $body =~ s/&[^;]*$//; # remove chopped character entities
 846         }
 847         return "$body$tail";
 848 }
 849
 850 ## ----------------------------------------------------------------------
 851 ## functions returning short strings
 852
 853 # CSS class for given age value (in seconds)
 854 sub age_class {
 855         my $age = shift;
 856
 857         if (!defined $age) {
 858                 return "noage";
 859         } elsif ($age < 60*60*2) {
 860                 return "age0";
 861         } elsif ($age < 60*60*24*2) {
 862                 return "age1";
 863         } else {
 864                 return "age2";
 865         }
 866 }
 867
 868 # convert age in seconds to "nn units ago" string
 869 sub age_string {
 870         my $age = shift;
 871         my $age_str;
 872
 873         if ($age > 60*60*24*365*2) {
 874                 $age_str = (int $age/60/60/24/365);
 875                 $age_str .= " years ago";
 876         } elsif ($age > 60*60*24*(365/12)*2) {
 877                 $age_str = int $age/60/60/24/(365/12);
 878                 $age_str .= " months ago";
 879         } elsif ($age > 60*60*24*7*2) {
 880                 $age_str = int $age/60/60/24/7;
 881                 $age_str .= " weeks ago";
 882         } elsif ($age > 60*60*24*2) {
 883                 $age_str = int $age/60/60/24;
 884                 $age_str .= " days ago";
 885         } elsif ($age > 60*60*2) {
 886                 $age_str = int $age/60/60;
 887                 $age_str .= " hours ago";
 888         } elsif ($age > 60*2) {
 889                 $age_str = int $age/60;
 890                 $age_str .= " min ago";
 891         } elsif ($age > 2) {
 892                 $age_str = int $age;
 893                 $age_str .= " sec ago";
 894         } else {
 895                 $age_str .= " right now";
 896         }
 897         return $age_str;
 898 }
 899
 900 use constant {
 901         S_IFINVALID => 0030000,
 902         S_IFGITLINK => 0160000,
 903 };
 904
 905 # submodule/subproject, a commit object reference
 906 sub S_ISGITLINK($) {
 907         my $mode = shift;
 908
 909         return (($mode & S_IFMT) == S_IFGITLINK)
 910 }
 911
 912 # convert file mode in octal to symbolic file mode string
 913 sub mode_str {
 914         my $mode = oct shift;
 915
 916         if (S_ISGITLINK($mode)) {
 917                 return 'm---------';
 918         } elsif (S_ISDIR($mode & S_IFMT)) {
 919                 return 'drwxr-xr-x';
 920         } elsif (S_ISLNK($mode)) {
 921                 return 'lrwxrwxrwx';
 922         } elsif (S_ISREG($mode)) {
 923                 # git cares only about the executable bit
 924                 if ($mode & S_IXUSR) {
 925                         return '-rwxr-xr-x';
 926                 } else {
 927                         return '-rw-r--r--';
 928                 };
 929         } else {
 930                 return '----------';
 931         }
 932 }
 933
 934 # convert file mode in octal to file type string
 935 sub file_type {
 936         my $mode = shift;
 937
 938         if ($mode !~ m/^[0-7]+$/) {
 939                 return $mode;
 940         } else {
 941                 $mode = oct $mode;
 942         }
 943
 944         if (S_ISGITLINK($mode)) {
 945                 return "submodule";
 946         } elsif (S_ISDIR($mode & S_IFMT)) {
 947                 return "directory";
 948         } elsif (S_ISLNK($mode)) {
 949                 return "symlink";
 950         } elsif (S_ISREG($mode)) {
 951                 return "file";
 952         } else {
 953                 return "unknown";
 954         }
 955 }
 956
 957 # convert file mode in octal to file type description string
 958 sub file_type_long {
 959         my $mode = shift;
 960
 961         if ($mode !~ m/^[0-7]+$/) {
 962                 return $mode;
 963         } else {
 964                 $mode = oct $mode;
 965         }
 966
 967         if (S_ISGITLINK($mode)) {
 968                 return "submodule";
 969         } elsif (S_ISDIR($mode & S_IFMT)) {
 970                 return "directory";
 971         } elsif (S_ISLNK($mode)) {
 972                 return "symlink";
 973         } elsif (S_ISREG($mode)) {
 974                 if ($mode & S_IXUSR) {
 975                         return "executable";
 976                 } else {
 977                         return "file";
 978                 };
 979         } else {
 980                 return "unknown";
 981         }
 982 }
 983
 984
 985 ## ----------------------------------------------------------------------
 986 ## functions returning short HTML fragments, or transforming HTML fragments
 987 ## which don't belong to other sections
 988
 989 # format line of commit message.
 990 sub format_log_line_html {
 991         my $line = shift;
 992
 993         $line = esc_html($line, -nbsp=>1);
 994         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 995                 my $hash_text = $1;
 996                 my $link =
 997                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 998                                 -class => "text"}, $hash_text);
 999                 $line =~ s/$hash_text/$link/;
1000         }
1001         return $line;
1002 }
1003
1004 # format marker of refs pointing to given object
1005 sub format_ref_marker {
1006         my ($refs, $id) = @_;
1007         my $markers = '';
1008
1009         if (defined $refs->{$id}) {
1010                 foreach my $ref (@{$refs->{$id}}) {
1011                         my ($type, $name) = qw();
1012                         # e.g. tags/v2.6.11 or heads/next
1013                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1014                                 $type = $1;
1015                                 $name = $2;
1016                         } else {
1017                                 $type = "ref";
1018                                 $name = $ref;
1019                         }
1020
1021                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1022                                     esc_html($name) . "</span>";
1023                 }
1024         }
1025
1026         if ($markers) {
1027                 return ' <span class="refs">'. $markers . '</span>';
1028         } else {
1029                 return "";
1030         }
1031 }
1032
1033 # format, perhaps shortened and with markers, title line
1034 sub format_subject_html {
1035         my ($long, $short, $href, $extra) = @_;
1036         $extra = '' unless defined($extra);
1037
1038         if (length($short) < length($long)) {
1039                 return $cgi->a({-href => $href, -class => "list subject",
1040                                 -title => to_utf8($long)},
1041                        esc_html($short) . $extra);
1042         } else {
1043                 return $cgi->a({-href => $href, -class => "list subject"},
1044                        esc_html($long)  . $extra);
1045         }
1046 }
1047
1048 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1049 sub format_git_diff_header_line {
1050         my $line = shift;
1051         my $diffinfo = shift;
1052         my ($from, $to) = @_;
1053
1054         if ($diffinfo->{'nparents'}) {
1055                 # combined diff
1056                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1057                 if ($to->{'href'}) {
1058                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1059                                          esc_path($to->{'file'}));
1060                 } else { # file was deleted (no href)
1061                         $line .= esc_path($to->{'file'});
1062                 }
1063         } else {
1064                 # "ordinary" diff
1065                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1066                 if ($from->{'href'}) {
1067                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1068                                          'a/' . esc_path($from->{'file'}));
1069                 } else { # file was added (no href)
1070                         $line .= 'a/' . esc_path($from->{'file'});
1071                 }
1072                 $line .= ' ';
1073                 if ($to->{'href'}) {
1074                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1075                                          'b/' . esc_path($to->{'file'}));
1076                 } else { # file was deleted
1077                         $line .= 'b/' . esc_path($to->{'file'});
1078                 }
1079         }
1080
1081         return "<div class=\"diff header\">$line</div>\n";
1082 }
1083
1084 # format extended diff header line, before patch itself
1085 sub format_extended_diff_header_line {
1086         my $line = shift;
1087         my $diffinfo = shift;
1088         my ($from, $to) = @_;
1089
1090         # match <path>
1091         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1092                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1093                                        esc_path($from->{'file'}));
1094         }
1095         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1096                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1097                                  esc_path($to->{'file'}));
1098         }
1099         # match single <mode>
1100         if ($line =~ m/\s(\d{6})$/) {
1101                 $line .= '<span class="info"> (' .
1102                          file_type_long($1) .
1103                          ')</span>';
1104         }
1105         # match <hash>
1106         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1107                 # can match only for combined diff
1108                 $line = 'index ';
1109                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1110                         if ($from->{'href'}[$i]) {
1111                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1112                                                   -class=>"hash"},
1113                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1114                         } else {
1115                                 $line .= '0' x 7;
1116                         }
1117                         # separator
1118                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1119                 }
1120                 $line .= '..';
1121                 if ($to->{'href'}) {
1122                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1123                                          substr($diffinfo->{'to_id'},0,7));
1124                 } else {
1125                         $line .= '0' x 7;
1126                 }
1127
1128         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1129                 # can match only for ordinary diff
1130                 my ($from_link, $to_link);
1131                 if ($from->{'href'}) {
1132                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1133                                              substr($diffinfo->{'from_id'},0,7));
1134                 } else {
1135                         $from_link = '0' x 7;
1136                 }
1137                 if ($to->{'href'}) {
1138                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1139                                            substr($diffinfo->{'to_id'},0,7));
1140                 } else {
1141                         $to_link = '0' x 7;
1142                 }
1143                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1144                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1145         }
1146
1147         return $line . "<br/>\n";
1148 }
1149
1150 # format from-file/to-file diff header
1151 sub format_diff_from_to_header {
1152         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1153         my $line;
1154         my $result = '';
1155
1156         $line = $from_line;
1157         #assert($line =~ m/^---/) if DEBUG;
1158         # no extra formatting for "^--- /dev/null"
1159         if (! $diffinfo->{'nparents'}) {
1160                 # ordinary (single parent) diff
1161                 if ($line =~ m!^--- "?a/!) {
1162                         if ($from->{'href'}) {
1163                                 $line = '--- a/' .
1164                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1165                                                 esc_path($from->{'file'}));
1166                         } else {
1167                                 $line = '--- a/' .
1168                                         esc_path($from->{'file'});
1169                         }
1170                 }
1171                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1172
1173         } else {
1174                 # combined diff (merge commit)
1175                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1176                         if ($from->{'href'}[$i]) {
1177                                 $line = '--- ' .
1178                                         $cgi->a({-href=>href(action=>"blobdiff",
1179                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1180                                                              hash_parent_base=>$parents[$i],
1181                                                              file_parent=>$from->{'file'}[$i],
1182                                                              hash=>$diffinfo->{'to_id'},
1183                                                              hash_base=>$hash,
1184                                                              file_name=>$to->{'file'}),
1185                                                  -class=>"path",
1186                                                  -title=>"diff" . ($i+1)},
1187                                                 $i+1) .
1188                                         '/' .
1189                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1190                                                 esc_path($from->{'file'}[$i]));
1191                         } else {
1192                                 $line = '--- /dev/null';
1193                         }
1194                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1195                 }
1196         }
1197
1198         $line = $to_line;
1199         #assert($line =~ m/^\+\+\+/) if DEBUG;
1200         # no extra formatting for "^+++ /dev/null"
1201         if ($line =~ m!^\+\+\+ "?b/!) {
1202                 if ($to->{'href'}) {
1203                         $line = '+++ b/' .
1204                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1205                                         esc_path($to->{'file'}));
1206                 } else {
1207                         $line = '+++ b/' .
1208                                 esc_path($to->{'file'});
1209                 }
1210         }
1211         $result .= qq!<div class="diff to_file">$line</div>\n!;
1212
1213         return $result;
1214 }
1215
1216 # create note for patch simplified by combined diff
1217 sub format_diff_cc_simplified {
1218         my ($diffinfo, @parents) = @_;
1219         my $result = '';
1220
1221         $result .= "<div class=\"diff header\">" .
1222                    "diff --cc ";
1223         if (!is_deleted($diffinfo)) {
1224                 $result .= $cgi->a({-href => href(action=>"blob",
1225                                                   hash_base=>$hash,
1226                                                   hash=>$diffinfo->{'to_id'},
1227                                                   file_name=>$diffinfo->{'to_file'}),
1228                                     -class => "path"},
1229                                    esc_path($diffinfo->{'to_file'}));
1230         } else {
1231                 $result .= esc_path($diffinfo->{'to_file'});
1232         }
1233         $result .= "</div>\n" . # class="diff header"
1234                    "<div class=\"diff nodifferences\">" .
1235                    "Simple merge" .
1236                    "</div>\n"; # class="diff nodifferences"
1237
1238         return $result;
1239 }
1240
1241 # format patch (diff) line (not to be used for diff headers)
1242 sub format_diff_line {
1243         my $line = shift;
1244         my ($from, $to) = @_;
1245         my $diff_class = "";
1246
1247         chomp $line;
1248
1249         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1250                 # combined diff
1251                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1252                 if ($line =~ m/^\@{3}/) {
1253                         $diff_class = " chunk_header";
1254                 } elsif ($line =~ m/^\\/) {
1255                         $diff_class = " incomplete";
1256                 } elsif ($prefix =~ tr/+/+/) {
1257                         $diff_class = " add";
1258                 } elsif ($prefix =~ tr/-/-/) {
1259                         $diff_class = " rem";
1260                 }
1261         } else {
1262                 # assume ordinary diff
1263                 my $char = substr($line, 0, 1);
1264                 if ($char eq '+') {
1265                         $diff_class = " add";
1266                 } elsif ($char eq '-') {
1267                         $diff_class = " rem";
1268                 } elsif ($char eq '@') {
1269                         $diff_class = " chunk_header";
1270                 } elsif ($char eq "\\") {
1271                         $diff_class = " incomplete";
1272                 }
1273         }
1274         $line = untabify($line);
1275         if ($from && $to && $line =~ m/^\@{2} /) {
1276                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1277                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1278
1279                 $from_lines = 0 unless defined $from_lines;
1280                 $to_lines   = 0 unless defined $to_lines;
1281
1282                 if ($from->{'href'}) {
1283                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1284                                              -class=>"list"}, $from_text);
1285                 }
1286                 if ($to->{'href'}) {
1287                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1288                                              -class=>"list"}, $to_text);
1289                 }
1290                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1291                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1292                 return "<div class=\"diff$diff_class\">$line</div>\n";
1293         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1294                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1295                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1296
1297                 @from_text = split(' ', $ranges);
1298                 for (my $i = 0; $i < @from_text; ++$i) {
1299                         ($from_start[$i], $from_nlines[$i]) =
1300                                 (split(',', substr($from_text[$i], 1)), 0);
1301                 }
1302
1303                 $to_text   = pop @from_text;
1304                 $to_start  = pop @from_start;
1305                 $to_nlines = pop @from_nlines;
1306
1307                 $line = "<span class=\"chunk_info\">$prefix ";
1308                 for (my $i = 0; $i < @from_text; ++$i) {
1309                         if ($from->{'href'}[$i]) {
1310                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1311                                                   -class=>"list"}, $from_text[$i]);
1312                         } else {
1313                                 $line .= $from_text[$i];
1314                         }
1315                         $line .= " ";
1316                 }
1317                 if ($to->{'href'}) {
1318                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1319                                           -class=>"list"}, $to_text);
1320                 } else {
1321                         $line .= $to_text;
1322                 }
1323                 $line .= " $prefix</span>" .
1324                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1325                 return "<div class=\"diff$diff_class\">$line</div>\n";
1326         }
1327         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1328 }
1329
1330 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1331 # linked.  Pass the hash of the tree/commit to snapshot.
1332 sub format_snapshot_links {
1333         my ($hash) = @_;
1334         my @snapshot_fmts = gitweb_check_feature('snapshot');
1335         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1336         my $num_fmts = @snapshot_fmts;
1337         if ($num_fmts > 1) {
1338                 # A parenthesized list of links bearing format names.
1339                 # e.g. "snapshot (_tar.gz_ _zip_)"
1340                 return "snapshot (" . join(' ', map
1341                         $cgi->a({
1342                                 -href => href(
1343                                         action=>"snapshot",
1344                                         hash=>$hash,
1345                                         snapshot_format=>$_
1346                                 )
1347                         }, $known_snapshot_formats{$_}{'display'})
1348                 , @snapshot_fmts) . ")";
1349         } elsif ($num_fmts == 1) {
1350                 # A single "snapshot" link whose tooltip bears the format name.
1351                 # i.e. "_snapshot_"
1352                 my ($fmt) = @snapshot_fmts;
1353                 return
1354                         $cgi->a({
1355                                 -href => href(
1356                                         action=>"snapshot",
1357                                         hash=>$hash,
1358                                         snapshot_format=>$fmt
1359                                 ),
1360                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1361                         }, "snapshot");
1362         } else { # $num_fmts == 0
1363                 return undef;
1364         }
1365 }
1366
1367 ## ----------------------------------------------------------------------
1368 ## git utility subroutines, invoking git commands
1369
1370 # returns path to the core git executable and the --git-dir parameter as list
1371 sub git_cmd {
1372         return $GIT, '--git-dir='.$git_dir;
1373 }
1374
1375 # returns path to the core git executable and the --git-dir parameter as string
1376 sub git_cmd_str {
1377         return join(' ', git_cmd());
1378 }
1379
1380 # get HEAD ref of given project as hash
1381 sub git_get_head_hash {
1382         my $project = shift;
1383         my $o_git_dir = $git_dir;
1384         my $retval = undef;
1385         $git_dir = "$projectroot/$project";
1386         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1387                 my $head = <$fd>;
1388                 close $fd;
1389                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1390                         $retval = $1;
1391                 }
1392         }
1393         if (defined $o_git_dir) {
1394                 $git_dir = $o_git_dir;
1395         }
1396         return $retval;
1397 }
1398
1399 # get type of given object
1400 sub git_get_type {
1401         my $hash = shift;
1402
1403         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1404         my $type = <$fd>;
1405         close $fd or return;
1406         chomp $type;
1407         return $type;
1408 }
1409
1410 sub git_get_project_config {
1411         my ($key, $type) = @_;
1412
1413         return unless ($key);
1414         $key =~ s/^gitweb\.//;
1415         return if ($key =~ m/\W/);
1416
1417         my @x = (git_cmd(), 'config');
1418         if (defined $type) { push @x, $type; }
1419         push @x, "--get";
1420         push @x, "gitweb.$key";
1421         my $val = qx(@x);
1422         chomp $val;
1423         return ($val);
1424 }
1425
1426 # get hash of given path at given ref
1427 sub git_get_hash_by_path {
1428         my $base = shift;
1429         my $path = shift || return undef;
1430         my $type = shift;
1431
1432         $path =~ s,/+$,,;
1433
1434         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1435                 or die_error(undef, "Open git-ls-tree failed");
1436         my $line = <$fd>;
1437         close $fd or return undef;
1438
1439         if (!defined $line) {
1440                 # there is no tree or hash given by $path at $base
1441                 return undef;
1442         }
1443
1444         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1445         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1446         if (defined $type && $type ne $2) {
1447                 # type doesn't match
1448                 return undef;
1449         }
1450         return $3;
1451 }
1452
1453 # get path of entry with given hash at given tree-ish (ref)
1454 # used to get 'from' filename for combined diff (merge commit) for renames
1455 sub git_get_path_by_hash {
1456         my $base = shift || return;
1457         my $hash = shift || return;
1458
1459         local $/ = "\0";
1460
1461         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1462                 or return undef;
1463         while (my $line = <$fd>) {
1464                 chomp $line;
1465
1466                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1467                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1468                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1469                         close $fd;
1470                         return $1;
1471                 }
1472         }
1473         close $fd;
1474         return undef;
1475 }
1476
1477 ## ......................................................................
1478 ## git utility functions, directly accessing git repository
1479
1480 sub git_get_project_description {
1481         my $path = shift;
1482
1483         open my $fd, "$projectroot/$path/description" or return undef;
1484         my $descr = <$fd>;
1485         close $fd;
1486         if (defined $descr) {
1487                 chomp $descr;
1488         }
1489         return $descr;
1490 }
1491
1492 sub git_get_project_url_list {
1493         my $path = shift;
1494
1495         open my $fd, "$projectroot/$path/cloneurl" or return;
1496         my @git_project_url_list = map { chomp; $_ } <$fd>;
1497         close $fd;
1498
1499         return wantarray ? @git_project_url_list : \@git_project_url_list;
1500 }
1501
1502 sub git_get_projects_list {
1503         my ($filter) = @_;
1504         my @list;
1505
1506         $filter ||= '';
1507         $filter =~ s/\.git$//;
1508
1509         my ($check_forks) = gitweb_check_feature('forks');
1510
1511         if (-d $projects_list) {
1512                 # search in directory
1513                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1514                 # remove the trailing "/"
1515                 $dir =~ s!/+$!!;
1516                 my $pfxlen = length("$dir");
1517                 my $pfxdepth = ($dir =~ tr!/!!);
1518
1519                 File::Find::find({
1520                         follow_fast => 1, # follow symbolic links
1521                         follow_skip => 2, # ignore duplicates
1522                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1523                         wanted => sub {
1524                                 # skip project-list toplevel, if we get it.
1525                                 return if (m!^[/.]$!);
1526                                 # only directories can be git repositories
1527                                 return unless (-d $_);
1528                                 # don't traverse too deep (Find is super slow on os x)
1529                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1530                                         $File::Find::prune = 1;
1531                                         return;
1532                                 }
1533
1534                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1535                                 # we check related file in $projectroot
1536                                 if ($check_forks and $subdir =~ m#/.#) {
1537                                         $File::Find::prune = 1;
1538                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1539                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1540                                         $File::Find::prune = 1;
1541                                 }
1542                         },
1543                 }, "$dir");
1544
1545         } elsif (-f $projects_list) {
1546                 # read from file(url-encoded):
1547                 # 'git%2Fgit.git Linus+Torvalds'
1548                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1549                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1550                 my %paths;
1551                 open my ($fd), $projects_list or return;
1552         PROJECT:
1553                 while (my $line = <$fd>) {
1554                         chomp $line;
1555                         my ($path, $owner) = split ' ', $line;
1556                         $path = unescape($path);
1557                         $owner = unescape($owner);
1558                         if (!defined $path) {
1559                                 next;
1560                         }
1561                         if ($filter ne '') {
1562                                 # looking for forks;
1563                                 my $pfx = substr($path, 0, length($filter));
1564                                 if ($pfx ne $filter) {
1565                                         next PROJECT;
1566                                 }
1567                                 my $sfx = substr($path, length($filter));
1568                                 if ($sfx !~ /^\/.*\.git$/) {
1569                                         next PROJECT;
1570                                 }
1571                         } elsif ($check_forks) {
1572                         PATH:
1573                                 foreach my $filter (keys %paths) {
1574                                         # looking for forks;
1575                                         my $pfx = substr($path, 0, length($filter));
1576                                         if ($pfx ne $filter) {
1577                                                 next PATH;
1578                                         }
1579                                         my $sfx = substr($path, length($filter));
1580                                         if ($sfx !~ /^\/.*\.git$/) {
1581                                                 next PATH;
1582                                         }
1583                                         # is a fork, don't include it in
1584                                         # the list
1585                                         next PROJECT;
1586                                 }
1587                         }
1588                         if (check_export_ok("$projectroot/$path")) {
1589                                 my $pr = {
1590                                         path => $path,
1591                                         owner => to_utf8($owner),
1592                                 };
1593                                 push @list, $pr;
1594                                 (my $forks_path = $path) =~ s/\.git$//;
1595                                 $paths{$forks_path}++;
1596                         }
1597                 }
1598                 close $fd;
1599         }
1600         return @list;
1601 }
1602
1603 our $gitweb_project_owner = undef;
1604 sub git_get_project_list_from_file {
1605
1606         return if (defined $gitweb_project_owner);
1607
1608         $gitweb_project_owner = {};
1609         # read from file (url-encoded):
1610         # 'git%2Fgit.git Linus+Torvalds'
1611         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1612         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1613         if (-f $projects_list) {
1614                 open (my $fd , $projects_list);
1615                 while (my $line = <$fd>) {
1616                         chomp $line;
1617                         my ($pr, $ow) = split ' ', $line;
1618                         $pr = unescape($pr);
1619                         $ow = unescape($ow);
1620                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1621                 }
1622                 close $fd;
1623         }
1624 }
1625
1626 sub git_get_project_owner {
1627         my $project = shift;
1628         my $owner;
1629
1630         return undef unless $project;
1631
1632         if (!defined $gitweb_project_owner) {
1633                 git_get_project_list_from_file();
1634         }
1635
1636         if (exists $gitweb_project_owner->{$project}) {
1637                 $owner = $gitweb_project_owner->{$project};
1638         }
1639         if (!defined $owner) {
1640                 $owner = get_file_owner("$projectroot/$project");
1641         }
1642
1643         return $owner;
1644 }
1645
1646 sub git_get_last_activity {
1647         my ($path) = @_;
1648         my $fd;
1649
1650         $git_dir = "$projectroot/$path";
1651         open($fd, "-|", git_cmd(), 'for-each-ref',
1652              '--format=%(committer)',
1653              '--sort=-committerdate',
1654              '--count=1',
1655              'refs/heads') or return;
1656         my $most_recent = <$fd>;
1657         close $fd or return;
1658         if (defined $most_recent &&
1659             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1660                 my $timestamp = $1;
1661                 my $age = time - $timestamp;
1662                 return ($age, age_string($age));
1663         }
1664         return (undef, undef);
1665 }
1666
1667 sub git_get_references {
1668         my $type = shift || "";
1669         my %refs;
1670         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1671         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1672         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1673                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1674                 or return;
1675
1676         while (my $line = <$fd>) {
1677                 chomp $line;
1678                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1679                         if (defined $refs{$1}) {
1680                                 push @{$refs{$1}}, $2;
1681                         } else {
1682                                 $refs{$1} = [ $2 ];
1683                         }
1684                 }
1685         }
1686         close $fd or return;
1687         return \%refs;
1688 }
1689
1690 sub git_get_rev_name_tags {
1691         my $hash = shift || return undef;
1692
1693         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1694                 or return;
1695         my $name_rev = <$fd>;
1696         close $fd;
1697
1698         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1699                 return $1;
1700         } else {
1701                 # catches also '$hash undefined' output
1702                 return undef;
1703         }
1704 }
1705
1706 ## ----------------------------------------------------------------------
1707 ## parse to hash functions
1708
1709 sub parse_date {
1710         my $epoch = shift;
1711         my $tz = shift || "-0000";
1712
1713         my %date;
1714         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1715         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1716         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1717         $date{'hour'} = $hour;
1718         $date{'minute'} = $min;
1719         $date{'mday'} = $mday;
1720         $date{'day'} = $days[$wday];
1721         $date{'month'} = $months[$mon];
1722         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1723                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1724         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1725                              $mday, $months[$mon], $hour ,$min;
1726         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1727                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1728
1729         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1730         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1731         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1732         $date{'hour_local'} = $hour;
1733         $date{'minute_local'} = $min;
1734         $date{'tz_local'} = $tz;
1735         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1736                                   1900+$year, $mon+1, $mday,
1737                                   $hour, $min, $sec, $tz);
1738         return %date;
1739 }
1740
1741 sub parse_tag {
1742         my $tag_id = shift;
1743         my %tag;
1744         my @comment;
1745
1746         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1747         $tag{'id'} = $tag_id;
1748         while (my $line = <$fd>) {
1749                 chomp $line;
1750                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1751                         $tag{'object'} = $1;
1752                 } elsif ($line =~ m/^type (.+)$/) {
1753                         $tag{'type'} = $1;
1754                 } elsif ($line =~ m/^tag (.+)$/) {
1755                         $tag{'name'} = $1;
1756                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1757                         $tag{'author'} = $1;
1758                         $tag{'epoch'} = $2;
1759                         $tag{'tz'} = $3;
1760                 } elsif ($line =~ m/--BEGIN/) {
1761                         push @comment, $line;
1762                         last;
1763                 } elsif ($line eq "") {
1764                         last;
1765                 }
1766         }
1767         push @comment, <$fd>;
1768         $tag{'comment'} = \@comment;
1769         close $fd or return;
1770         if (!defined $tag{'name'}) {
1771                 return
1772         };
1773         return %tag
1774 }
1775
1776 sub parse_commit_text {
1777         my ($commit_text, $withparents) = @_;
1778         my @commit_lines = split '\n', $commit_text;
1779         my %co;
1780
1781         pop @commit_lines; # Remove '\0'
1782
1783         if (! @commit_lines) {
1784                 return;
1785         }
1786
1787         my $header = shift @commit_lines;
1788         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1789                 return;
1790         }
1791         ($co{'id'}, my @parents) = split ' ', $header;
1792         while (my $line = shift @commit_lines) {
1793                 last if $line eq "\n";
1794                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1795                         $co{'tree'} = $1;
1796                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1797                         push @parents, $1;
1798                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1799                         $co{'author'} = $1;
1800                         $co{'author_epoch'} = $2;
1801                         $co{'author_tz'} = $3;
1802                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1803                                 $co{'author_name'}  = $1;
1804                                 $co{'author_email'} = $2;
1805                         } else {
1806                                 $co{'author_name'} = $co{'author'};
1807                         }
1808                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1809                         $co{'committer'} = $1;
1810                         $co{'committer_epoch'} = $2;
1811                         $co{'committer_tz'} = $3;
1812                         $co{'committer_name'} = $co{'committer'};
1813                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1814                                 $co{'committer_name'}  = $1;
1815                                 $co{'committer_email'} = $2;
1816                         } else {
1817                                 $co{'committer_name'} = $co{'committer'};
1818                         }
1819                 }
1820         }
1821         if (!defined $co{'tree'}) {
1822                 return;
1823         };
1824         $co{'parents'} = \@parents;
1825         $co{'parent'} = $parents[0];
1826
1827         foreach my $title (@commit_lines) {
1828                 $title =~ s/^    //;
1829                 if ($title ne "") {
1830                         $co{'title'} = chop_str($title, 80, 5);
1831                         # remove leading stuff of merges to make the interesting part visible
1832                         if (length($title) > 50) {
1833                                 $title =~ s/^Automatic //;
1834                                 $title =~ s/^merge (of|with) /Merge ... /i;
1835                                 if (length($title) > 50) {
1836                                         $title =~ s/(http|rsync):\/\///;
1837                                 }
1838                                 if (length($title) > 50) {
1839                                         $title =~ s/(master|www|rsync)\.//;
1840                                 }
1841                                 if (length($title) > 50) {
1842                                         $title =~ s/kernel.org:?//;
1843                                 }
1844                                 if (length($title) > 50) {
1845                                         $title =~ s/\/pub\/scm//;
1846                                 }
1847                         }
1848                         $co{'title_short'} = chop_str($title, 50, 5);
1849                         last;
1850                 }
1851         }
1852         if ($co{'title'} eq "") {
1853                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1854         }
1855         # remove added spaces
1856         foreach my $line (@commit_lines) {
1857                 $line =~ s/^    //;
1858         }
1859         $co{'comment'} = \@commit_lines;
1860
1861         my $age = time - $co{'committer_epoch'};
1862         $co{'age'} = $age;
1863         $co{'age_string'} = age_string($age);
1864         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1865         if ($age > 60*60*24*7*2) {
1866                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1867                 $co{'age_string_age'} = $co{'age_string'};
1868         } else {
1869                 $co{'age_string_date'} = $co{'age_string'};
1870                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1871         }
1872         return %co;
1873 }
1874
1875 sub parse_commit {
1876         my ($commit_id) = @_;
1877         my %co;
1878
1879         local $/ = "\0";
1880
1881         open my $fd, "-|", git_cmd(), "rev-list",
1882                 "--parents",
1883                 "--header",
1884                 "--max-count=1",
1885                 $commit_id,
1886                 "--",
1887                 or die_error(undef, "Open git-rev-list failed");
1888         %co = parse_commit_text(<$fd>, 1);
1889         close $fd;
1890
1891         return %co;
1892 }
1893
1894 sub parse_commits {
1895         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1896         my @cos;
1897
1898         $maxcount ||= 1;
1899         $skip ||= 0;
1900
1901         local $/ = "\0";
1902
1903         open my $fd, "-|", git_cmd(), "rev-list",
1904                 "--header",
1905                 ($arg ? ($arg) : ()),
1906                 ("--max-count=" . $maxcount),
1907                 ("--skip=" . $skip),
1908                 @extra_options,
1909                 $commit_id,
1910                 "--",
1911                 ($filename ? ($filename) : ())
1912                 or die_error(undef, "Open git-rev-list failed");
1913         while (my $line = <$fd>) {
1914                 my %co = parse_commit_text($line);
1915                 push @cos, \%co;
1916         }
1917         close $fd;
1918
1919         return wantarray ? @cos : \@cos;
1920 }
1921
1922 # parse ref from ref_file, given by ref_id, with given type
1923 sub parse_ref {
1924         my $ref_file = shift;
1925         my $ref_id = shift;
1926         my $type = shift || git_get_type($ref_id);
1927         my %ref_item;
1928
1929         $ref_item{'type'} = $type;
1930         $ref_item{'id'} = $ref_id;
1931         $ref_item{'epoch'} = 0;
1932         $ref_item{'age'} = "unknown";
1933         if ($type eq "tag") {
1934                 my %tag = parse_tag($ref_id);
1935                 $ref_item{'comment'} = $tag{'comment'};
1936                 if ($tag{'type'} eq "commit") {
1937                         my %co = parse_commit($tag{'object'});
1938                         $ref_item{'epoch'} = $co{'committer_epoch'};
1939                         $ref_item{'age'} = $co{'age_string'};
1940                 } elsif (defined($tag{'epoch'})) {
1941                         my $age = time - $tag{'epoch'};
1942                         $ref_item{'epoch'} = $tag{'epoch'};
1943                         $ref_item{'age'} = age_string($age);
1944                 }
1945                 $ref_item{'reftype'} = $tag{'type'};
1946                 $ref_item{'name'} = $tag{'name'};
1947                 $ref_item{'refid'} = $tag{'object'};
1948         } elsif ($type eq "commit"){
1949                 my %co = parse_commit($ref_id);
1950                 $ref_item{'reftype'} = "commit";
1951                 $ref_item{'name'} = $ref_file;
1952                 $ref_item{'title'} = $co{'title'};
1953                 $ref_item{'refid'} = $ref_id;
1954                 $ref_item{'epoch'} = $co{'committer_epoch'};
1955                 $ref_item{'age'} = $co{'age_string'};
1956         } else {
1957                 $ref_item{'reftype'} = $type;
1958                 $ref_item{'name'} = $ref_file;
1959                 $ref_item{'refid'} = $ref_id;
1960         }
1961
1962         return %ref_item;
1963 }
1964
1965 # parse line of git-diff-tree "raw" output
1966 sub parse_difftree_raw_line {
1967         my $line = shift;
1968         my %res;
1969
1970         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1971         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1972         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1973                 $res{'from_mode'} = $1;
1974                 $res{'to_mode'} = $2;
1975                 $res{'from_id'} = $3;
1976                 $res{'to_id'} = $4;
1977                 $res{'status'} = $5;
1978                 $res{'similarity'} = $6;
1979                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1980                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1981                 } else {
1982                         $res{'file'} = unquote($7);
1983                 }
1984         }
1985         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1986         # combined diff (for merge commit)
1987         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1988                 $res{'nparents'}  = length($1);
1989                 $res{'from_mode'} = [ split(' ', $2) ];
1990                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1991                 $res{'from_id'} = [ split(' ', $3) ];
1992                 $res{'to_id'} = pop @{$res{'from_id'}};
1993                 $res{'status'} = [ split('', $4) ];
1994                 $res{'to_file'} = unquote($5);
1995         }
1996         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1997         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1998                 $res{'commit'} = $1;
1999         }
2000
2001         return wantarray ? %res : \%res;
2002 }
2003
2004 # parse line of git-ls-tree output
2005 sub parse_ls_tree_line ($;%) {
2006         my $line = shift;
2007         my %opts = @_;
2008         my %res;
2009
2010         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2011         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2012
2013         $res{'mode'} = $1;
2014         $res{'type'} = $2;
2015         $res{'hash'} = $3;
2016         if ($opts{'-z'}) {
2017                 $res{'name'} = $4;
2018         } else {
2019                 $res{'name'} = unquote($4);
2020         }
2021
2022         return wantarray ? %res : \%res;
2023 }
2024
2025 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2026 sub parse_from_to_diffinfo {
2027         my ($diffinfo, $from, $to, @parents) = @_;
2028
2029         if ($diffinfo->{'nparents'}) {
2030                 # combined diff
2031                 $from->{'file'} = [];
2032                 $from->{'href'} = [];
2033                 fill_from_file_info($diffinfo, @parents)
2034                         unless exists $diffinfo->{'from_file'};
2035                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2036                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2037                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2038                                 $from->{'href'}[$i] = href(action=>"blob",
2039                                                            hash_base=>$parents[$i],
2040                                                            hash=>$diffinfo->{'from_id'}[$i],
2041                                                            file_name=>$from->{'file'}[$i]);
2042                         } else {
2043                                 $from->{'href'}[$i] = undef;
2044                         }
2045                 }
2046         } else {
2047                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2048                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2049                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2050                                                hash=>$diffinfo->{'from_id'},
2051                                                file_name=>$from->{'file'});
2052                 } else {
2053                         delete $from->{'href'};
2054                 }
2055         }
2056
2057         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2058         if (!is_deleted($diffinfo)) { # file exists in result
2059                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2060                                      hash=>$diffinfo->{'to_id'},
2061                                      file_name=>$to->{'file'});
2062         } else {
2063                 delete $to->{'href'};
2064         }
2065 }
2066
2067 ## ......................................................................
2068 ## parse to array of hashes functions
2069
2070 sub git_get_heads_list {
2071         my $limit = shift;
2072         my @headslist;
2073
2074         open my $fd, '-|', git_cmd(), 'for-each-ref',
2075                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2076                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2077                 'refs/heads'
2078                 or return;
2079         while (my $line = <$fd>) {
2080                 my %ref_item;
2081
2082                 chomp $line;
2083                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2084                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2085                 my ($committer, $epoch, $tz) =
2086                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2087                 $name =~ s!^refs/heads/!!;
2088
2089                 $ref_item{'name'}  = $name;
2090                 $ref_item{'id'}    = $hash;
2091                 $ref_item{'title'} = $title || '(no commit message)';
2092                 $ref_item{'epoch'} = $epoch;
2093                 if ($epoch) {
2094                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2095                 } else {
2096                         $ref_item{'age'} = "unknown";
2097                 }
2098
2099                 push @headslist, \%ref_item;
2100         }
2101         close $fd;
2102
2103         return wantarray ? @headslist : \@headslist;
2104 }
2105
2106 sub git_get_tags_list {
2107         my $limit = shift;
2108         my @tagslist;
2109
2110         open my $fd, '-|', git_cmd(), 'for-each-ref',
2111                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2112                 '--format=%(objectname) %(objecttype) %(refname) '.
2113                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2114                 'refs/tags'
2115                 or return;
2116         while (my $line = <$fd>) {
2117                 my %ref_item;
2118
2119                 chomp $line;
2120                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2121                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2122                 my ($creator, $epoch, $tz) =
2123                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2124                 $name =~ s!^refs/tags/!!;
2125
2126                 $ref_item{'type'} = $type;
2127                 $ref_item{'id'} = $id;
2128                 $ref_item{'name'} = $name;
2129                 if ($type eq "tag") {
2130                         $ref_item{'subject'} = $title;
2131                         $ref_item{'reftype'} = $reftype;
2132                         $ref_item{'refid'}   = $refid;
2133                 } else {
2134                         $ref_item{'reftype'} = $type;
2135                         $ref_item{'refid'}   = $id;
2136                 }
2137
2138                 if ($type eq "tag" || $type eq "commit") {
2139                         $ref_item{'epoch'} = $epoch;
2140                         if ($epoch) {
2141                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2142                         } else {
2143                                 $ref_item{'age'} = "unknown";
2144                         }
2145                 }
2146
2147                 push @tagslist, \%ref_item;
2148         }
2149         close $fd;
2150
2151         return wantarray ? @tagslist : \@tagslist;
2152 }
2153
2154 ## ----------------------------------------------------------------------
2155 ## filesystem-related functions
2156
2157 sub get_file_owner {
2158         my $path = shift;
2159
2160         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2161         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2162         if (!defined $gcos) {
2163                 return undef;
2164         }
2165         my $owner = $gcos;
2166         $owner =~ s/[,;].*$//;
2167         return to_utf8($owner);
2168 }
2169
2170 ## ......................................................................
2171 ## mimetype related functions
2172
2173 sub mimetype_guess_file {
2174         my $filename = shift;
2175         my $mimemap = shift;
2176         -r $mimemap or return undef;
2177
2178         my %mimemap;
2179         open(MIME, $mimemap) or return undef;
2180         while (<MIME>) {
2181                 next if m/^#/; # skip comments
2182                 my ($mime, $exts) = split(/\t+/);
2183                 if (defined $exts) {
2184                         my @exts = split(/\s+/, $exts);
2185                         foreach my $ext (@exts) {
2186                                 $mimemap{$ext} = $mime;
2187                         }
2188                 }
2189         }
2190         close(MIME);
2191
2192         $filename =~ /\.([^.]*)$/;
2193         return $mimemap{$1};
2194 }
2195
2196 sub mimetype_guess {
2197         my $filename = shift;
2198         my $mime;
2199         $filename =~ /\./ or return undef;
2200
2201         if ($mimetypes_file) {
2202                 my $file = $mimetypes_file;
2203                 if ($file !~ m!^/!) { # if it is relative path
2204                         # it is relative to project
2205                         $file = "$projectroot/$project/$file";
2206                 }
2207                 $mime = mimetype_guess_file($filename, $file);
2208         }
2209         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2210         return $mime;
2211 }
2212
2213 sub blob_mimetype {
2214         my $fd = shift;
2215         my $filename = shift;
2216
2217         if ($filename) {
2218                 my $mime = mimetype_guess($filename);
2219                 $mime and return $mime;
2220         }
2221
2222         # just in case
2223         return $default_blob_plain_mimetype unless $fd;
2224
2225         if (-T $fd) {
2226                 return 'text/plain' .
2227                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2228         } elsif (! $filename) {
2229                 return 'application/octet-stream';
2230         } elsif ($filename =~ m/\.png$/i) {
2231                 return 'image/png';
2232         } elsif ($filename =~ m/\.gif$/i) {
2233                 return 'image/gif';
2234         } elsif ($filename =~ m/\.jpe?g$/i) {
2235                 return 'image/jpeg';
2236         } else {
2237                 return 'application/octet-stream';
2238         }
2239 }
2240
2241 ## ======================================================================
2242 ## functions printing HTML: header, footer, error page
2243
2244 sub git_header_html {
2245         my $status = shift || "200 OK";
2246         my $expires = shift;
2247
2248         my $title = "$site_name";
2249         if (defined $project) {
2250                 $title .= " - " . to_utf8($project);
2251                 if (defined $action) {
2252                         $title .= "/$action";
2253                         if (defined $file_name) {
2254                                 $title .= " - " . esc_path($file_name);
2255                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2256                                         $title .= "/";
2257                                 }
2258                         }
2259                 }
2260         }
2261         my $content_type;
2262         # require explicit support from the UA if we are to send the page as
2263         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2264         # we have to do this because MSIE sometimes globs '*/*', pretending to
2265         # support xhtml+xml but choking when it gets what it asked for.
2266         if (defined $cgi->http('HTTP_ACCEPT') &&
2267             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2268             $cgi->Accept('application/xhtml+xml') != 0) {
2269                 $content_type = 'application/xhtml+xml';
2270         } else {
2271                 $content_type = 'text/html';
2272         }
2273         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2274                            -status=> $status, -expires => $expires);
2275         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2276         print <<EOF;
2277 <?xml version="1.0" encoding="utf-8"?>
2278 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2279 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2280 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2281 <!-- git core binaries version $git_version -->
2282 <head>
2283 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2284 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2285 <meta name="robots" content="index, nofollow"/>
2286 <title>$title</title>
2287 EOF
2288 # print out each stylesheet that exist
2289         if (defined $stylesheet) {
2290 #provides backwards capability for those people who define style sheet in a config file
2291                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2292         } else {
2293                 foreach my $stylesheet (@stylesheets) {
2294                         next unless $stylesheet;
2295                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2296                 }
2297         }
2298         if (defined $project) {
2299                 printf('<link rel="alternate" title="%s log RSS feed" '.
2300                        'href="%s" type="application/rss+xml" />'."\n",
2301                        esc_param($project), href(action=>"rss"));
2302                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2303                        'href="%s" type="application/rss+xml" />'."\n",
2304                        esc_param($project), href(action=>"rss",
2305                                                  extra_options=>"--no-merges"));
2306                 printf('<link rel="alternate" title="%s log Atom feed" '.
2307                        'href="%s" type="application/atom+xml" />'."\n",
2308                        esc_param($project), href(action=>"atom"));
2309                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2310                        'href="%s" type="application/atom+xml" />'."\n",
2311                        esc_param($project), href(action=>"atom",
2312                                                  extra_options=>"--no-merges"));
2313         } else {
2314                 printf('<link rel="alternate" title="%s projects list" '.
2315                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2316                        $site_name, href(project=>undef, action=>"project_index"));
2317                 printf('<link rel="alternate" title="%s projects feeds" '.
2318                        'href="%s" type="text/x-opml"/>'."\n",
2319                        $site_name, href(project=>undef, action=>"opml"));
2320         }
2321         if (defined $favicon) {
2322                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2323         }
2324
2325         print "</head>\n" .
2326               "<body>\n";
2327
2328         if (-f $site_header) {
2329                 open (my $fd, $site_header);
2330                 print <$fd>;
2331                 close $fd;
2332         }
2333
2334         print "<div class=\"page_header\">\n" .
2335               $cgi->a({-href => esc_url($logo_url),
2336                        -title => $logo_label},
2337                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2338         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2339         if (defined $project) {
2340                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2341                 if (defined $action) {
2342                         print " / $action";
2343                 }
2344                 print "\n";
2345         }
2346         print "</div>\n";
2347
2348         my ($have_search) = gitweb_check_feature('search');
2349         if ((defined $project) && ($have_search)) {
2350                 if (!defined $searchtext) {
2351                         $searchtext = "";
2352                 }
2353                 my $search_hash;
2354                 if (defined $hash_base) {
2355                         $search_hash = $hash_base;
2356                 } elsif (defined $hash) {
2357                         $search_hash = $hash;
2358                 } else {
2359                         $search_hash = "HEAD";
2360                 }
2361                 my $action = $my_uri;
2362                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2363                 if ($use_pathinfo) {
2364                         $action .= "/$project";
2365                 } else {
2366                         $cgi->param("p", $project);
2367                 }
2368                 $cgi->param("a", "search");
2369                 $cgi->param("h", $search_hash);
2370                 print $cgi->startform(-method => "get", -action => $action) .
2371                       "<div class=\"search\">\n" .
2372                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2373                       $cgi->hidden(-name => "a") . "\n" .
2374                       $cgi->hidden(-name => "h") . "\n" .
2375                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2376                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2377                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2378                       " search:\n",
2379                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2380                       "</div>" .
2381                       $cgi->end_form() . "\n";
2382         }
2383 }
2384
2385 sub git_footer_html {
2386         print "<div class=\"page_footer\">\n";
2387         if (defined $project) {
2388                 my $descr = git_get_project_description($project);
2389                 if (defined $descr) {
2390                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2391                 }
2392                 print $cgi->a({-href => href(action=>"rss"),
2393                               -class => "rss_logo"}, "RSS") . " ";
2394                 print $cgi->a({-href => href(action=>"atom"),
2395                               -class => "rss_logo"}, "Atom") . "\n";
2396         } else {
2397                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2398                               -class => "rss_logo"}, "OPML") . " ";
2399                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2400                               -class => "rss_logo"}, "TXT") . "\n";
2401         }
2402         print "</div>\n" ;
2403
2404         if (-f $site_footer) {
2405                 open (my $fd, $site_footer);
2406                 print <$fd>;
2407                 close $fd;
2408         }
2409
2410         print "</body>\n" .
2411               "</html>";
2412 }
2413
2414 sub die_error {
2415         my $status = shift || "403 Forbidden";
2416         my $error = shift || "Malformed query, file missing or permission denied";
2417
2418         git_header_html($status);
2419         print <<EOF;
2420 <div class="page_body">
2421 <br /><br />
2422 $status - $error
2423 <br />
2424 </div>
2425 EOF
2426         git_footer_html();
2427         exit;
2428 }
2429
2430 ## ----------------------------------------------------------------------
2431 ## functions printing or outputting HTML: navigation
2432
2433 sub git_print_page_nav {
2434         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2435         $extra = '' if !defined $extra; # pager or formats
2436
2437         my @navs = qw(summary shortlog log commit commitdiff tree);
2438         if ($suppress) {
2439                 @navs = grep { $_ ne $suppress } @navs;
2440         }
2441
2442         my %arg = map { $_ => {action=>$_} } @navs;
2443         if (defined $head) {
2444                 for (qw(commit commitdiff)) {
2445                         $arg{$_}{'hash'} = $head;
2446                 }
2447                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2448                         for (qw(shortlog log)) {
2449                                 $arg{$_}{'hash'} = $head;
2450                         }
2451                 }
2452         }
2453         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2454         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2455
2456         print "<div class=\"page_nav\">\n" .
2457                 (join " | ",
2458                  map { $_ eq $current ?
2459                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2460                  } @navs);
2461         print "<br/>\n$extra<br/>\n" .
2462               "</div>\n";
2463 }
2464
2465 sub format_paging_nav {
2466         my ($action, $hash, $head, $page, $nrevs) = @_;
2467         my $paging_nav;
2468
2469
2470         if ($hash ne $head || $page) {
2471                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2472         } else {
2473                 $paging_nav .= "HEAD";
2474         }
2475
2476         if ($page > 0) {
2477                 $paging_nav .= " &sdot; " .
2478                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2479                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2480         } else {
2481                 $paging_nav .= " &sdot; prev";
2482         }
2483
2484         if ($nrevs >= (100 * ($page+1)-1)) {
2485                 $paging_nav .= " &sdot; " .
2486                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2487                                  -accesskey => "n", -title => "Alt-n"}, "next");
2488         } else {
2489                 $paging_nav .= " &sdot; next";
2490         }
2491
2492         return $paging_nav;
2493 }
2494
2495 ## ......................................................................
2496 ## functions printing or outputting HTML: div
2497
2498 sub git_print_header_div {
2499         my ($action, $title, $hash, $hash_base) = @_;
2500         my %args = ();
2501
2502         $args{'action'} = $action;
2503         $args{'hash'} = $hash if $hash;
2504         $args{'hash_base'} = $hash_base if $hash_base;
2505
2506         print "<div class=\"header\">\n" .
2507               $cgi->a({-href => href(%args), -class => "title"},
2508               $title ? $title : $action) .
2509               "\n</div>\n";
2510 }
2511
2512 #sub git_print_authorship (\%) {
2513 sub git_print_authorship {
2514         my $co = shift;
2515
2516         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2517         print "<div class=\"author_date\">" .
2518               esc_html($co->{'author_name'}) .
2519               " [$ad{'rfc2822'}";
2520         if ($ad{'hour_local'} < 6) {
2521                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2522                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2523         } else {
2524                 printf(" (%02d:%02d %s)",
2525                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2526         }
2527         print "]</div>\n";
2528 }
2529
2530 sub git_print_page_path {
2531         my $name = shift;
2532         my $type = shift;
2533         my $hb = shift;
2534
2535
2536         print "<div class=\"page_path\">";
2537         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2538                       -title => 'tree root'}, to_utf8("[$project]"));
2539         print " / ";
2540         if (defined $name) {
2541                 my @dirname = split '/', $name;
2542                 my $basename = pop @dirname;
2543                 my $fullname = '';
2544
2545                 foreach my $dir (@dirname) {
2546                         $fullname .= ($fullname ? '/' : '') . $dir;
2547                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2548                                                      hash_base=>$hb),
2549                                       -title => $fullname}, esc_path($dir));
2550                         print " / ";
2551                 }
2552                 if (defined $type && $type eq 'blob') {
2553                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2554                                                      hash_base=>$hb),
2555                                       -title => $name}, esc_path($basename));
2556                 } elsif (defined $type && $type eq 'tree') {
2557                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2558                                                      hash_base=>$hb),
2559                                       -title => $name}, esc_path($basename));
2560                         print " / ";
2561                 } else {
2562                         print esc_path($basename);
2563                 }
2564         }
2565         print "<br/></div>\n";
2566 }
2567
2568 # sub git_print_log (\@;%) {
2569 sub git_print_log ($;%) {
2570         my $log = shift;
2571         my %opts = @_;
2572
2573         if ($opts{'-remove_title'}) {
2574                 # remove title, i.e. first line of log
2575                 shift @$log;
2576         }
2577         # remove leading empty lines
2578         while (defined $log->[0] && $log->[0] eq "") {
2579                 shift @$log;
2580         }
2581
2582         # print log
2583         my $signoff = 0;
2584         my $empty = 0;
2585         foreach my $line (@$log) {
2586                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2587                         $signoff = 1;
2588                         $empty = 0;
2589                         if (! $opts{'-remove_signoff'}) {
2590                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2591                                 next;
2592                         } else {
2593                                 # remove signoff lines
2594                                 next;
2595                         }
2596                 } else {
2597                         $signoff = 0;
2598                 }
2599
2600                 # print only one empty line
2601                 # do not print empty line after signoff
2602                 if ($line eq "") {
2603                         next if ($empty || $signoff);
2604                         $empty = 1;
2605                 } else {
2606                         $empty = 0;
2607                 }
2608
2609                 print format_log_line_html($line) . "<br/>\n";
2610         }
2611
2612         if ($opts{'-final_empty_line'}) {
2613                 # end with single empty line
2614                 print "<br/>\n" unless $empty;
2615         }
2616 }
2617
2618 # return link target (what link points to)
2619 sub git_get_link_target {
2620         my $hash = shift;
2621         my $link_target;
2622
2623         # read link
2624         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2625                 or return;
2626         {
2627                 local $/;
2628                 $link_target = <$fd>;
2629         }
2630         close $fd
2631                 or return;
2632
2633         return $link_target;
2634 }
2635
2636 # given link target, and the directory (basedir) the link is in,
2637 # return target of link relative to top directory (top tree);
2638 # return undef if it is not possible (including absolute links).
2639 sub normalize_link_target {
2640         my ($link_target, $basedir, $hash_base) = @_;
2641
2642         # we can normalize symlink target only if $hash_base is provided
2643         return unless $hash_base;
2644
2645         # absolute symlinks (beginning with '/') cannot be normalized
2646         return if (substr($link_target, 0, 1) eq '/');
2647
2648         # normalize link target to path from top (root) tree (dir)
2649         my $path;
2650         if ($basedir) {
2651                 $path = $basedir . '/' . $link_target;
2652         } else {
2653                 # we are in top (root) tree (dir)
2654                 $path = $link_target;
2655         }
2656
2657         # remove //, /./, and /../
2658         my @path_parts;
2659         foreach my $part (split('/', $path)) {
2660                 # discard '.' and ''
2661                 next if (!$part || $part eq '.');
2662                 # handle '..'
2663                 if ($part eq '..') {
2664                         if (@path_parts) {
2665                                 pop @path_parts;
2666                         } else {
2667                                 # link leads outside repository (outside top dir)
2668                                 return;
2669                         }
2670                 } else {
2671                         push @path_parts, $part;
2672                 }
2673         }
2674         $path = join('/', @path_parts);
2675
2676         return $path;
2677 }
2678
2679 # print tree entry (row of git_tree), but without encompassing <tr> element
2680 sub git_print_tree_entry {
2681         my ($t, $basedir, $hash_base, $have_blame) = @_;
2682
2683         my %base_key = ();
2684         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2685
2686         # The format of a table row is: mode list link.  Where mode is
2687         # the mode of the entry, list is the name of the entry, an href,
2688         # and link is the action links of the entry.
2689
2690         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2691         if ($t->{'type'} eq "blob") {
2692                 print "<td class=\"list\">" .
2693                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2694                                                file_name=>"$basedir$t->{'name'}", %base_key),
2695                                 -class => "list"}, esc_path($t->{'name'}));
2696                 if (S_ISLNK(oct $t->{'mode'})) {
2697                         my $link_target = git_get_link_target($t->{'hash'});
2698                         if ($link_target) {
2699                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2700                                 if (defined $norm_target) {
2701                                         print " -> " .
2702                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2703                                                                      file_name=>$norm_target),
2704                                                        -title => $norm_target}, esc_path($link_target));
2705                                 } else {
2706                                         print " -> " . esc_path($link_target);
2707                                 }
2708                         }
2709                 }
2710                 print "</td>\n";
2711                 print "<td class=\"link\">";
2712                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2713                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2714                               "blob");
2715                 if ($have_blame) {
2716                         print " | " .
2717                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2718                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2719                                       "blame");
2720                 }
2721                 if (defined $hash_base) {
2722                         print " | " .
2723                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2724                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2725                                       "history");
2726                 }
2727                 print " | " .
2728                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2729                                                file_name=>"$basedir$t->{'name'}")},
2730                                 "raw");
2731                 print "</td>\n";
2732
2733         } elsif ($t->{'type'} eq "tree") {
2734                 print "<td class=\"list\">";
2735                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2736                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2737                               esc_path($t->{'name'}));
2738                 print "</td>\n";
2739                 print "<td class=\"link\">";
2740                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2741                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2742                               "tree");
2743                 if (defined $hash_base) {
2744                         print " | " .
2745                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2746                                                      file_name=>"$basedir$t->{'name'}")},
2747                                       "history");
2748                 }
2749                 print "</td>\n";
2750         } else {
2751                 # unknown object: we can only present history for it
2752                 # (this includes 'commit' object, i.e. submodule support)
2753                 print "<td class=\"list\">" .
2754                       esc_path($t->{'name'}) .
2755                       "</td>\n";
2756                 print "<td class=\"link\">";
2757                 if (defined $hash_base) {
2758                         print $cgi->a({-href => href(action=>"history",
2759                                                      hash_base=>$hash_base,
2760                                                      file_name=>"$basedir$t->{'name'}")},
2761                                       "history");
2762                 }
2763                 print "</td>\n";
2764         }
2765 }
2766
2767 ## ......................................................................
2768 ## functions printing large fragments of HTML
2769
2770 sub fill_from_file_info {
2771         my ($diff, @parents) = @_;
2772
2773         $diff->{'from_file'} = [ ];
2774         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2775         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2776                 if ($diff->{'status'}[$i] eq 'R' ||
2777                     $diff->{'status'}[$i] eq 'C') {
2778                         $diff->{'from_file'}[$i] =
2779                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2780                 }
2781         }
2782
2783         return $diff;
2784 }
2785
2786 # parameters can be strings, or references to arrays of strings
2787 sub from_ids_eq {
2788         my ($a, $b) = @_;
2789
2790         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2791                 for (my $i = 0; $i < @$a; ++$i) {
2792                         return 0 unless ($a->[$i] eq $b->[$i]);
2793                 }
2794                 return 1;
2795         } elsif (!ref($a) && !ref($b)) {
2796                 return $a eq $b;
2797         } else {
2798                 return 0;
2799         }
2800 }
2801
2802 sub is_deleted {
2803         my $diffinfo = shift;
2804
2805         return $diffinfo->{'to_id'} eq ('0' x 40);
2806 }
2807
2808 sub git_difftree_body {
2809         my ($difftree, $hash, @parents) = @_;
2810         my ($parent) = $parents[0];
2811         my ($have_blame) = gitweb_check_feature('blame');
2812         print "<div class=\"list_head\">\n";
2813         if ($#{$difftree} > 10) {
2814                 print(($#{$difftree} + 1) . " files changed:\n");
2815         }
2816         print "</div>\n";
2817
2818         print "<table class=\"" .
2819               (@parents > 1 ? "combined " : "") .
2820               "diff_tree\">\n";
2821
2822         # header only for combined diff in 'commitdiff' view
2823         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2824         if ($has_header) {
2825                 # table header
2826                 print "<thead><tr>\n" .
2827                        "<th></th><th></th>\n"; # filename, patchN link
2828                 for (my $i = 0; $i < @parents; $i++) {
2829                         my $par = $parents[$i];
2830                         print "<th>" .
2831                               $cgi->a({-href => href(action=>"commitdiff",
2832                                                      hash=>$hash, hash_parent=>$par),
2833                                        -title => 'commitdiff to parent number ' .
2834                                                   ($i+1) . ': ' . substr($par,0,7)},
2835                                       $i+1) .
2836                               "&nbsp;</th>\n";
2837                 }
2838                 print "</tr></thead>\n<tbody>\n";
2839         }
2840
2841         my $alternate = 1;
2842         my $patchno = 0;
2843         foreach my $line (@{$difftree}) {
2844                 my $diff;
2845                 if (ref($line) eq "HASH") {
2846                         # pre-parsed (or generated by hand)
2847                         $diff = $line;
2848                 } else {
2849                         $diff = parse_difftree_raw_line($line);
2850                 }
2851
2852                 if ($alternate) {
2853                         print "<tr class=\"dark\">\n";
2854                 } else {
2855                         print "<tr class=\"light\">\n";
2856                 }
2857                 $alternate ^= 1;
2858
2859                 if (exists $diff->{'nparents'}) { # combined diff
2860
2861                         fill_from_file_info($diff, @parents)
2862                                 unless exists $diff->{'from_file'};
2863
2864                         if (!is_deleted($diff)) {
2865                                 # file exists in the result (child) commit
2866                                 print "<td>" .
2867                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2868                                                              file_name=>$diff->{'to_file'},
2869                                                              hash_base=>$hash),
2870                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2871                                       "</td>\n";
2872                         } else {
2873                                 print "<td>" .
2874                                       esc_path($diff->{'to_file'}) .
2875                                       "</td>\n";
2876                         }
2877
2878                         if ($action eq 'commitdiff') {
2879                                 # link to patch
2880                                 $patchno++;
2881                                 print "<td class=\"link\">" .
2882                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2883                                       " | " .
2884                                       "</td>\n";
2885                         }
2886
2887                         my $has_history = 0;
2888                         my $not_deleted = 0;
2889                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2890                                 my $hash_parent = $parents[$i];
2891                                 my $from_hash = $diff->{'from_id'}[$i];
2892                                 my $from_path = $diff->{'from_file'}[$i];
2893                                 my $status = $diff->{'status'}[$i];
2894
2895                                 $has_history ||= ($status ne 'A');
2896                                 $not_deleted ||= ($status ne 'D');
2897
2898                                 if ($status eq 'A') {
2899                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2900                                 } elsif ($status eq 'D') {
2901                                         print "<td class=\"link\">" .
2902                                               $cgi->a({-href => href(action=>"blob",
2903                                                                      hash_base=>$hash,
2904                                                                      hash=>$from_hash,
2905                                                                      file_name=>$from_path)},
2906                                                       "blob" . ($i+1)) .
2907                                               " | </td>\n";
2908                                 } else {
2909                                         if ($diff->{'to_id'} eq $from_hash) {
2910                                                 print "<td class=\"link nochange\">";
2911                                         } else {
2912                                                 print "<td class=\"link\">";
2913                                         }
2914                                         print $cgi->a({-href => href(action=>"blobdiff",
2915                                                                      hash=>$diff->{'to_id'},
2916                                                                      hash_parent=>$from_hash,
2917                                                                      hash_base=>$hash,
2918                                                                      hash_parent_base=>$hash_parent,
2919                                                                      file_name=>$diff->{'to_file'},
2920                                                                      file_parent=>$from_path)},
2921                                                       "diff" . ($i+1)) .
2922                                               " | </td>\n";
2923                                 }
2924                         }
2925
2926                         print "<td class=\"link\">";
2927                         if ($not_deleted) {
2928                                 print $cgi->a({-href => href(action=>"blob",
2929                                                              hash=>$diff->{'to_id'},
2930                                                              file_name=>$diff->{'to_file'},
2931                                                              hash_base=>$hash)},
2932                                               "blob");
2933                                 print " | " if ($has_history);
2934                         }
2935                         if ($has_history) {
2936                                 print $cgi->a({-href => href(action=>"history",
2937                                                              file_name=>$diff->{'to_file'},
2938                                                              hash_base=>$hash)},
2939                                               "history");
2940                         }
2941                         print "</td>\n";
2942
2943                         print "</tr>\n";
2944                         next; # instead of 'else' clause, to avoid extra indent
2945                 }
2946                 # else ordinary diff
2947
2948                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2949                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2950                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2951                         $to_mode_oct = oct $diff->{'to_mode'};
2952                         if (S_ISREG($to_mode_oct)) { # only for regular file
2953                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2954                         }
2955                         $to_file_type = file_type($diff->{'to_mode'});
2956                 }
2957                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2958                         $from_mode_oct = oct $diff->{'from_mode'};
2959                         if (S_ISREG($to_mode_oct)) { # only for regular file
2960                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2961                         }
2962                         $from_file_type = file_type($diff->{'from_mode'});
2963                 }
2964
2965                 if ($diff->{'status'} eq "A") { # created
2966                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2967                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2968                         $mode_chng   .= "]</span>";
2969                         print "<td>";
2970                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2971                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2972                                       -class => "list"}, esc_path($diff->{'file'}));
2973                         print "</td>\n";
2974                         print "<td>$mode_chng</td>\n";
2975                         print "<td class=\"link\">";
2976                         if ($action eq 'commitdiff') {
2977                                 # link to patch
2978                                 $patchno++;
2979                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2980                                 print " | ";
2981                         }
2982                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2983                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2984                                       "blob");
2985                         print "</td>\n";
2986
2987                 } elsif ($diff->{'status'} eq "D") { # deleted
2988                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2989                         print "<td>";
2990                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2991                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2992                                        -class => "list"}, esc_path($diff->{'file'}));
2993                         print "</td>\n";
2994                         print "<td>$mode_chng</td>\n";
2995                         print "<td class=\"link\">";
2996                         if ($action eq 'commitdiff') {
2997                                 # link to patch
2998                                 $patchno++;
2999                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3000                                 print " | ";
3001                         }
3002                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3003                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3004                                       "blob") . " | ";
3005                         if ($have_blame) {
3006                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3007                                                              file_name=>$diff->{'file'})},
3008                                               "blame") . " | ";
3009                         }
3010                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3011                                                      file_name=>$diff->{'file'})},
3012                                       "history");
3013                         print "</td>\n";
3014
3015                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3016                         my $mode_chnge = "";
3017                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3018                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3019                                 if ($from_file_type ne $to_file_type) {
3020                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3021                                 }
3022                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3023                                         if ($from_mode_str && $to_mode_str) {
3024                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3025                                         } elsif ($to_mode_str) {
3026                                                 $mode_chnge .= " mode: $to_mode_str";
3027                                         }
3028                                 }
3029                                 $mode_chnge .= "]</span>\n";
3030                         }
3031                         print "<td>";
3032                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3033                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3034                                       -class => "list"}, esc_path($diff->{'file'}));
3035                         print "</td>\n";
3036                         print "<td>$mode_chnge</td>\n";
3037                         print "<td class=\"link\">";
3038                         if ($action eq 'commitdiff') {
3039                                 # link to patch
3040                                 $patchno++;
3041                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3042                                       " | ";
3043                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3044                                 # "commit" view and modified file (not onlu mode changed)
3045                                 print $cgi->a({-href => href(action=>"blobdiff",
3046                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3047                                                              hash_base=>$hash, hash_parent_base=>$parent,
3048                                                              file_name=>$diff->{'file'})},
3049                                               "diff") .
3050                                       " | ";
3051                         }
3052                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3053                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3054                                        "blob") . " | ";
3055                         if ($have_blame) {
3056                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3057                                                              file_name=>$diff->{'file'})},
3058                                               "blame") . " | ";
3059                         }
3060                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3061                                                      file_name=>$diff->{'file'})},
3062                                       "history");
3063                         print "</td>\n";
3064
3065                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3066                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3067                         my $nstatus = $status_name{$diff->{'status'}};
3068                         my $mode_chng = "";
3069                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3070                                 # mode also for directories, so we cannot use $to_mode_str
3071                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3072                         }
3073                         print "<td>" .
3074                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3075                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3076                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3077                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3078                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3079                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3080                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3081                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3082                               "<td class=\"link\">";
3083                         if ($action eq 'commitdiff') {
3084                                 # link to patch
3085                                 $patchno++;
3086                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3087                                       " | ";
3088                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3089                                 # "commit" view and modified file (not only pure rename or copy)
3090                                 print $cgi->a({-href => href(action=>"blobdiff",
3091                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3092                                                              hash_base=>$hash, hash_parent_base=>$parent,
3093                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3094                                               "diff") .
3095                                       " | ";
3096                         }
3097                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3098                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3099                                       "blob") . " | ";
3100                         if ($have_blame) {
3101                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3102                                                              file_name=>$diff->{'to_file'})},
3103                                               "blame") . " | ";
3104                         }
3105                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3106                                                     file_name=>$diff->{'to_file'})},
3107                                       "history");
3108                         print "</td>\n";
3109
3110                 } # we should not encounter Unmerged (U) or Unknown (X) status
3111                 print "</tr>\n";
3112         }
3113         print "</tbody>" if $has_header;
3114         print "</table>\n";
3115 }
3116
3117 sub git_patchset_body {
3118         my ($fd, $difftree, $hash, @hash_parents) = @_;
3119         my ($hash_parent) = $hash_parents[0];
3120
3121         my $patch_idx = 0;
3122         my $patch_number = 0;
3123         my $patch_line;
3124         my $diffinfo;
3125         my (%from, %to);
3126
3127         print "<div class=\"patchset\">\n";
3128
3129         # skip to first patch
3130         while ($patch_line = <$fd>) {
3131                 chomp $patch_line;
3132
3133                 last if ($patch_line =~ m/^diff /);
3134         }
3135
3136  PATCH:
3137         while ($patch_line) {
3138                 my @diff_header;
3139                 my ($from_id, $to_id);
3140
3141                 # git diff header
3142                 #assert($patch_line =~ m/^diff /) if DEBUG;
3143                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3144                 $patch_number++;
3145                 push @diff_header, $patch_line;
3146
3147                 # extended diff header
3148         EXTENDED_HEADER:
3149                 while ($patch_line = <$fd>) {
3150                         chomp $patch_line;
3151
3152                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3153
3154                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3155                                 $from_id = $1;
3156                                 $to_id   = $2;
3157                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3158                                 $from_id = [ split(',', $1) ];
3159                                 $to_id   = $2;
3160                         }
3161
3162                         push @diff_header, $patch_line;
3163                 }
3164                 my $last_patch_line = $patch_line;
3165
3166                 # check if current patch belong to current raw line
3167                 # and parse raw git-diff line if needed
3168                 if (defined $diffinfo &&
3169                     defined $from_id && defined $to_id &&
3170                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3171                     $diffinfo->{'to_id'} eq $to_id) {
3172                         # this is continuation of a split patch
3173                         print "<div class=\"patch cont\">\n";
3174                 } else {
3175                         # advance raw git-diff output if needed
3176                         $patch_idx++ if defined $diffinfo;
3177
3178                         # compact combined diff output can have some patches skipped
3179                         # find which patch (using pathname of result) we are at now
3180                         my $to_name;
3181                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3182                                 $to_name = $1;
3183                         }
3184
3185                         do {
3186                                 # read and prepare patch information
3187                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3188                                         # pre-parsed (or generated by hand)
3189                                         $diffinfo = $difftree->[$patch_idx];
3190                                 } else {
3191                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3192                                 }
3193
3194                                 # check if current raw line has no patch (it got simplified)
3195                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3196                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3197                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3198                                               "</div>\n";  # class="patch"
3199
3200                                         $patch_idx++;
3201                                         $patch_number++;
3202                                 }
3203                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3204                                  $patch_idx > $#$difftree);
3205
3206                         # modifies %from, %to hashes
3207                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3208
3209                         # this is first patch for raw difftree line with $patch_idx index
3210                         # we index @$difftree array from 0, but number patches from 1
3211                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3212                 }
3213
3214                 # print "git diff" header
3215                 $patch_line = shift @diff_header;
3216                 print format_git_diff_header_line($patch_line, $diffinfo,
3217                                                   \%from, \%to);
3218
3219                 # print extended diff header
3220                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3221         EXTENDED_HEADER:
3222                 foreach $patch_line (@diff_header) {
3223                         print format_extended_diff_header_line($patch_line, $diffinfo,
3224                                                                \%from, \%to);
3225                 }
3226                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3227
3228                 # from-file/to-file diff header
3229                 $patch_line = $last_patch_line;
3230                 if (! $patch_line) {
3231                         print "</div>\n"; # class="patch"
3232                         last PATCH;
3233                 }
3234                 next PATCH if ($patch_line =~ m/^diff /);
3235                 #assert($patch_line =~ m/^---/) if DEBUG;
3236                 #assert($patch_line eq $last_patch_line) if DEBUG;
3237
3238                 $patch_line = <$fd>;
3239                 chomp $patch_line;
3240                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3241
3242                 print format_diff_from_to_header($last_patch_line, $patch_line,
3243                                                  $diffinfo, \%from, \%to,
3244                                                  @hash_parents);
3245
3246                 # the patch itself
3247         LINE:
3248                 while ($patch_line = <$fd>) {
3249                         chomp $patch_line;
3250
3251                         next PATCH if ($patch_line =~ m/^diff /);
3252
3253                         print format_diff_line($patch_line, \%from, \%to);
3254                 }
3255
3256         } continue {
3257                 print "</div>\n"; # class="patch"
3258         }
3259
3260         # for compact combined (--cc) format, with chunk and patch simpliciaction
3261         # patchset might be empty, but there might be unprocessed raw lines
3262         for ($patch_idx++ if $patch_number > 0;
3263              $patch_idx < @$difftree;
3264              $patch_idx++) {
3265                 # read and prepare patch information
3266                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3267                         # pre-parsed (or generated by hand)
3268                         $diffinfo = $difftree->[$patch_idx];
3269                 } else {
3270                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3271                 }
3272
3273                 # generate anchor for "patch" links in difftree / whatchanged part
3274                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3275                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3276                       "</div>\n";  # class="patch"
3277
3278                 $patch_number++;
3279         }
3280
3281         if ($patch_number == 0) {
3282                 if (@hash_parents > 1) {
3283                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3284                 } else {
3285                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3286                 }
3287         }
3288
3289         print "</div>\n"; # class="patchset"
3290 }
3291
3292 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3293
3294 sub git_project_list_body {
3295         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3296
3297         my ($check_forks) = gitweb_check_feature('forks');
3298
3299         my @projects;
3300         foreach my $pr (@$projlist) {
3301                 my (@aa) = git_get_last_activity($pr->{'path'});
3302                 unless (@aa) {
3303                         next;
3304                 }
3305                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3306                 if (!defined $pr->{'descr'}) {
3307                         my $descr = git_get_project_description($pr->{'path'}) || "";
3308                         $pr->{'descr_long'} = to_utf8($descr);
3309                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3310                 }
3311                 if (!defined $pr->{'owner'}) {
3312                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3313                 }
3314                 if ($check_forks) {
3315                         my $pname = $pr->{'path'};
3316                         if (($pname =~ s/\.git$//) &&
3317                             ($pname !~ /\/$/) &&
3318                             (-d "$projectroot/$pname")) {
3319                                 $pr->{'forks'} = "-d $projectroot/$pname";
3320                         }
3321                         else {
3322                                 $pr->{'forks'} = 0;
3323                         }
3324                 }
3325                 push @projects, $pr;
3326         }
3327
3328         $order ||= $default_projects_order;
3329         $from = 0 unless defined $from;
3330         $to = $#projects if (!defined $to || $#projects < $to);
3331
3332         print "<table class=\"project_list\">\n";
3333         unless ($no_header) {
3334                 print "<tr>\n";
3335                 if ($check_forks) {
3336                         print "<th></th>\n";
3337                 }
3338                 if ($order eq "project") {
3339                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3340                         print "<th>Project</th>\n";
3341                 } else {
3342                         print "<th>" .
3343                               $cgi->a({-href => href(project=>undef, order=>'project'),
3344                                        -class => "header"}, "Project") .
3345                               "</th>\n";
3346                 }
3347                 if ($order eq "descr") {
3348                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3349                         print "<th>Description</th>\n";
3350                 } else {
3351                         print "<th>" .
3352                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3353                                        -class => "header"}, "Description") .
3354                               "</th>\n";
3355                 }
3356                 if ($order eq "owner") {
3357                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3358                         print "<th>Owner</th>\n";
3359                 } else {
3360                         print "<th>" .
3361                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3362                                        -class => "header"}, "Owner") .
3363                               "</th>\n";
3364                 }
3365                 if ($order eq "age") {
3366                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3367                         print "<th>Last Change</th>\n";
3368                 } else {
3369                         print "<th>" .
3370                               $cgi->a({-href => href(project=>undef, order=>'age'),
3371                                        -class => "header"}, "Last Change") .
3372                               "</th>\n";
3373                 }
3374                 print "<th></th>\n" .
3375                       "</tr>\n";
3376         }
3377         my $alternate = 1;
3378         for (my $i = $from; $i <= $to; $i++) {
3379                 my $pr = $projects[$i];
3380                 if ($alternate) {
3381                         print "<tr class=\"dark\">\n";
3382                 } else {
3383                         print "<tr class=\"light\">\n";
3384                 }
3385                 $alternate ^= 1;
3386                 if ($check_forks) {
3387                         print "<td>";
3388                         if ($pr->{'forks'}) {
3389                                 print "<!-- $pr->{'forks'} -->\n";
3390                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3391                         }
3392                         print "</td>\n";
3393                 }
3394                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3395                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3396                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3397                                         -class => "list", -title => $pr->{'descr_long'}},
3398                                         esc_html($pr->{'descr'})) . "</td>\n" .
3399                       "<td><i>" . esc_html(chop_str($pr->{'owner'}, 15)) . "</i></td>\n";
3400                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3401                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3402                       "<td class=\"link\">" .
3403                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3404                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3405                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3406                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3407                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3408                       "</td>\n" .
3409                       "</tr>\n";
3410         }
3411         if (defined $extra) {
3412                 print "<tr>\n";
3413                 if ($check_forks) {
3414                         print "<td></td>\n";
3415                 }
3416                 print "<td colspan=\"5\">$extra</td>\n" .
3417                       "</tr>\n";
3418         }
3419         print "</table>\n";
3420 }
3421
3422 sub git_shortlog_body {
3423         # uses global variable $project
3424         my ($commitlist, $from, $to, $refs, $extra) = @_;
3425
3426         $from = 0 unless defined $from;
3427         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3428
3429         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3430         my $alternate = 1;
3431         for (my $i = $from; $i <= $to; $i++) {
3432                 my %co = %{$commitlist->[$i]};
3433                 my $commit = $co{'id'};
3434                 my $ref = format_ref_marker($refs, $commit);
3435                 if ($alternate) {
3436                         print "<tr class=\"dark\">\n";
3437                 } else {
3438                         print "<tr class=\"light\">\n";
3439                 }
3440                 $alternate ^= 1;
3441                 my $author = chop_str($co{'author_name'}, 10);
3442                 if ($author ne $co{'author_name'}) {
3443                         $author = "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
3444                 } else {
3445                         $author = esc_html($author);
3446                 }
3447                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3448                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3449                       "<td><i>" . $author . "</i></td>\n" .
3450                       "<td>";
3451                 print format_subject_html($co{'title'}, $co{'title_short'},
3452                                           href(action=>"commit", hash=>$commit), $ref);
3453                 print "</td>\n" .
3454                       "<td class=\"link\">" .
3455                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3456                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3457                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3458                 my $snapshot_links = format_snapshot_links($commit);
3459                 if (defined $snapshot_links) {
3460                         print " | " . $snapshot_links;
3461                 }
3462                 print "</td>\n" .
3463                       "</tr>\n";
3464         }
3465         if (defined $extra) {
3466                 print "<tr>\n" .
3467                       "<td colspan=\"4\">$extra</td>\n" .
3468                       "</tr>\n";
3469         }
3470         print "</table>\n";
3471 }
3472
3473 sub git_history_body {
3474         # Warning: assumes constant type (blob or tree) during history
3475         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3476
3477         $from = 0 unless defined $from;
3478         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3479
3480         print "<table class=\"history\" cellspacing=\"0\">\n";
3481         my $alternate = 1;
3482         for (my $i = $from; $i <= $to; $i++) {
3483                 my %co = %{$commitlist->[$i]};
3484                 if (!%co) {
3485                         next;
3486                 }
3487                 my $commit = $co{'id'};
3488
3489                 my $ref = format_ref_marker($refs, $commit);
3490
3491                 if ($alternate) {
3492                         print "<tr class=\"dark\">\n";
3493                 } else {
3494                         print "<tr class=\"light\">\n";
3495                 }
3496                 $alternate ^= 1;
3497         # shortlog uses      chop_str($co{'author_name'}, 10)
3498                 my $author = chop_str($co{'author_name'}, 15, 3);
3499                 if ($author ne $co{'author_name'}) {
3500                         "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
3501                 } else {
3502                         $author = esc_html($author);
3503                 }
3504                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3505                       "<td><i>" . $author . "</i></td>\n" .
3506                       "<td>";
3507                 # originally git_history used chop_str($co{'title'}, 50)
3508                 print format_subject_html($co{'title'}, $co{'title_short'},
3509                                           href(action=>"commit", hash=>$commit), $ref);
3510                 print "</td>\n" .
3511                       "<td class=\"link\">" .
3512                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3513                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3514
3515                 if ($ftype eq 'blob') {
3516                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3517                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3518                         if (defined $blob_current && defined $blob_parent &&
3519                                         $blob_current ne $blob_parent) {
3520                                 print " | " .
3521                                         $cgi->a({-href => href(action=>"blobdiff",
3522                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3523                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3524                                                                file_name=>$file_name)},
3525                                                 "diff to current");
3526                         }
3527                 }
3528                 print "</td>\n" .
3529                       "</tr>\n";
3530         }
3531         if (defined $extra) {
3532                 print "<tr>\n" .
3533                       "<td colspan=\"4\">$extra</td>\n" .
3534                       "</tr>\n";
3535         }
3536         print "</table>\n";
3537 }
3538
3539 sub git_tags_body {
3540         # uses global variable $project
3541         my ($taglist, $from, $to, $extra) = @_;
3542         $from = 0 unless defined $from;
3543         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3544
3545         print "<table class=\"tags\" cellspacing=\"0\">\n";
3546         my $alternate = 1;
3547         for (my $i = $from; $i <= $to; $i++) {
3548                 my $entry = $taglist->[$i];
3549                 my %tag = %$entry;
3550                 my $comment = $tag{'subject'};
3551                 my $comment_short;
3552                 if (defined $comment) {
3553                         $comment_short = chop_str($comment, 30, 5);
3554                 }
3555                 if ($alternate) {
3556                         print "<tr class=\"dark\">\n";
3557                 } else {
3558                         print "<tr class=\"light\">\n";
3559                 }
3560                 $alternate ^= 1;
3561                 if (defined $tag{'age'}) {
3562                         print "<td><i>$tag{'age'}</i></td>\n";
3563                 } else {
3564                         print "<td></td>\n";
3565                 }
3566                 print "<td>" .
3567                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3568                                -class => "list name"}, esc_html($tag{'name'})) .
3569                       "</td>\n" .
3570                       "<td>";
3571                 if (defined $comment) {
3572                         print format_subject_html($comment, $comment_short,
3573                                                   href(action=>"tag", hash=>$tag{'id'}));
3574                 }
3575                 print "</td>\n" .
3576                       "<td class=\"selflink\">";
3577                 if ($tag{'type'} eq "tag") {
3578                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3579                 } else {
3580                         print "&nbsp;";
3581                 }
3582                 print "</td>\n" .
3583                       "<td class=\"link\">" . " | " .
3584                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3585                 if ($tag{'reftype'} eq "commit") {
3586                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3587                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3588                 } elsif ($tag{'reftype'} eq "blob") {
3589                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3590                 }
3591                 print "</td>\n" .
3592                       "</tr>";
3593         }
3594         if (defined $extra) {
3595                 print "<tr>\n" .
3596                       "<td colspan=\"5\">$extra</td>\n" .
3597                       "</tr>\n";
3598         }
3599         print "</table>\n";
3600 }
3601
3602 sub git_heads_body {
3603         # uses global variable $project
3604         my ($headlist, $head, $from, $to, $extra) = @_;
3605         $from = 0 unless defined $from;
3606         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3607
3608         print "<table class=\"heads\" cellspacing=\"0\">\n";
3609         my $alternate = 1;
3610         for (my $i = $from; $i <= $to; $i++) {
3611                 my $entry = $headlist->[$i];
3612                 my %ref = %$entry;
3613                 my $curr = $ref{'id'} eq $head;
3614                 if ($alternate) {
3615                         print "<tr class=\"dark\">\n";
3616                 } else {
3617                         print "<tr class=\"light\">\n";
3618                 }
3619                 $alternate ^= 1;
3620                 print "<td><i>$ref{'age'}</i></td>\n" .
3621                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3622                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3623                                -class => "list name"},esc_html($ref{'name'})) .
3624                       "</td>\n" .
3625                       "<td class=\"link\">" .
3626                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3627                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3628                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3629                       "</td>\n" .
3630                       "</tr>";
3631         }
3632         if (defined $extra) {
3633                 print "<tr>\n" .
3634                       "<td colspan=\"3\">$extra</td>\n" .
3635                       "</tr>\n";
3636         }
3637         print "</table>\n";
3638 }
3639
3640 sub git_search_grep_body {
3641         my ($commitlist, $from, $to, $extra) = @_;
3642         $from = 0 unless defined $from;
3643         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3644
3645         print "<table class=\"grep\" cellspacing=\"0\">\n";
3646         my $alternate = 1;
3647         for (my $i = $from; $i <= $to; $i++) {
3648                 my %co = %{$commitlist->[$i]};
3649                 if (!%co) {
3650                         next;
3651                 }
3652                 my $commit = $co{'id'};
3653                 if ($alternate) {
3654                         print "<tr class=\"dark\">\n";
3655                 } else {
3656                         print "<tr class=\"light\">\n";
3657                 }
3658                 $alternate ^= 1;
3659                 my $author = chop_str($co{'author_name'}, 15, 5);
3660                 if ($author ne $co{'author_name'}) {
3661                         $author = "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
3662                 } else {
3663                         $author = esc_html($author);
3664                 }
3665                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3666                       "<td><i>" . $author . "</i></td>\n" .
3667                       "<td>" .
3668                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3669                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3670                 my $comment = $co{'comment'};
3671                 foreach my $line (@$comment) {
3672                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3673                                 my $lead = esc_html($1) || "";
3674                                 $lead = chop_str($lead, 30, 10);
3675                                 my $match = esc_html($2) || "";
3676                                 my $trail = esc_html($3) || "";
3677                                 $trail = chop_str($trail, 30, 10);
3678                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3679                                 print chop_str($text, 80, 5) . "<br/>\n";
3680                         }
3681                 }
3682                 print "</td>\n" .
3683                       "<td class=\"link\">" .
3684                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3685                       " | " .
3686                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3687                 print "</td>\n" .
3688                       "</tr>\n";
3689         }
3690         if (defined $extra) {
3691                 print "<tr>\n" .
3692                       "<td colspan=\"3\">$extra</td>\n" .
3693                       "</tr>\n";
3694         }
3695         print "</table>\n";
3696 }
3697
3698 ## ======================================================================
3699 ## ======================================================================
3700 ## actions
3701
3702 sub git_project_list {
3703         my $order = $cgi->param('o');
3704         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3705                 die_error(undef, "Unknown order parameter");
3706         }
3707
3708         my @list = git_get_projects_list();
3709         if (!@list) {
3710                 die_error(undef, "No projects found");
3711         }
3712
3713         git_header_html();
3714         if (-f $home_text) {
3715                 print "<div class=\"index_include\">\n";
3716                 open (my $fd, $home_text);
3717                 print <$fd>;
3718                 close $fd;
3719                 print "</div>\n";
3720         }
3721         git_project_list_body(\@list, $order);
3722         git_footer_html();
3723 }
3724
3725 sub git_forks {
3726         my $order = $cgi->param('o');
3727         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3728                 die_error(undef, "Unknown order parameter");
3729         }
3730
3731         my @list = git_get_projects_list($project);
3732         if (!@list) {
3733                 die_error(undef, "No forks found");
3734         }
3735
3736         git_header_html();
3737         git_print_page_nav('','');
3738         git_print_header_div('summary', "$project forks");
3739         git_project_list_body(\@list, $order);
3740         git_footer_html();
3741 }
3742
3743 sub git_project_index {
3744         my @projects = git_get_projects_list($project);
3745
3746         print $cgi->header(
3747                 -type => 'text/plain',
3748                 -charset => 'utf-8',
3749                 -content_disposition => 'inline; filename="index.aux"');
3750
3751         foreach my $pr (@projects) {
3752                 if (!exists $pr->{'owner'}) {
3753                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3754                 }
3755
3756                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3757                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3758                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3759                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3760                 $path  =~ s/ /\+/g;
3761                 $owner =~ s/ /\+/g;
3762
3763                 print "$path $owner\n";
3764         }
3765 }
3766
3767 sub git_summary {
3768         my $descr = git_get_project_description($project) || "none";
3769         my %co = parse_commit("HEAD");
3770         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3771         my $head = $co{'id'};
3772
3773         my $owner = git_get_project_owner($project);
3774
3775         my $refs = git_get_references();
3776         # These get_*_list functions return one more to allow us to see if
3777         # there are more ...
3778         my @taglist  = git_get_tags_list(16);
3779         my @headlist = git_get_heads_list(16);
3780         my @forklist;
3781         my ($check_forks) = gitweb_check_feature('forks');
3782
3783         if ($check_forks) {
3784                 @forklist = git_get_projects_list($project);
3785         }
3786
3787         git_header_html();
3788         git_print_page_nav('summary','', $head);
3789
3790         print "<div class=\"title\">&nbsp;</div>\n";
3791         print "<table cellspacing=\"0\">\n" .
3792               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3793               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3794         if (defined $cd{'rfc2822'}) {
3795                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3796         }
3797
3798         # use per project git URL list in $projectroot/$project/cloneurl
3799         # or make project git URL from git base URL and project name
3800         my $url_tag = "URL";
3801         my @url_list = git_get_project_url_list($project);
3802         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3803         foreach my $git_url (@url_list) {
3804                 next unless $git_url;
3805                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3806                 $url_tag = "";
3807         }
3808         print "</table>\n";
3809
3810         if (-s "$projectroot/$project/README.html") {
3811                 if (open my $fd, "$projectroot/$project/README.html") {
3812                         print "<div class=\"title\">readme</div>\n";
3813                         print $_ while (<$fd>);
3814                         close $fd;
3815                 }
3816         }
3817
3818         # we need to request one more than 16 (0..15) to check if
3819         # those 16 are all
3820         my @commitlist = $head ? parse_commits($head, 17) : ();
3821         if (@commitlist) {
3822                 git_print_header_div('shortlog');
3823                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3824                                   $#commitlist <=  15 ? undef :
3825                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3826         }
3827
3828         if (@taglist) {
3829                 git_print_header_div('tags');
3830                 git_tags_body(\@taglist, 0, 15,
3831                               $#taglist <=  15 ? undef :
3832                               $cgi->a({-href => href(action=>"tags")}, "..."));
3833         }
3834
3835         if (@headlist) {
3836                 git_print_header_div('heads');
3837                 git_heads_body(\@headlist, $head, 0, 15,
3838                                $#headlist <= 15 ? undef :
3839                                $cgi->a({-href => href(action=>"heads")}, "..."));
3840         }
3841
3842         if (@forklist) {
3843                 git_print_header_div('forks');
3844                 git_project_list_body(\@forklist, undef, 0, 15,
3845                                       $#forklist <= 15 ? undef :
3846                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3847                                       'noheader');
3848         }
3849
3850         git_footer_html();
3851 }
3852
3853 sub git_tag {
3854         my $head = git_get_head_hash($project);
3855         git_header_html();
3856         git_print_page_nav('','', $head,undef,$head);
3857         my %tag = parse_tag($hash);
3858
3859         if (! %tag) {
3860                 die_error(undef, "Unknown tag object");
3861         }
3862
3863         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3864         print "<div class=\"title_text\">\n" .
3865               "<table cellspacing=\"0\">\n" .
3866               "<tr>\n" .
3867               "<td>object</td>\n" .
3868               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3869                                $tag{'object'}) . "</td>\n" .
3870               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3871                                               $tag{'type'}) . "</td>\n" .
3872               "</tr>\n";
3873         if (defined($tag{'author'})) {
3874                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3875                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3876                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3877                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3878                         "</td></tr>\n";
3879         }
3880         print "</table>\n\n" .
3881               "</div>\n";
3882         print "<div class=\"page_body\">";
3883         my $comment = $tag{'comment'};
3884         foreach my $line (@$comment) {
3885                 chomp $line;
3886                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3887         }
3888         print "</div>\n";
3889         git_footer_html();
3890 }
3891
3892 sub git_blame2 {
3893         my $fd;
3894         my $ftype;
3895
3896         my ($have_blame) = gitweb_check_feature('blame');
3897         if (!$have_blame) {
3898                 die_error('403 Permission denied', "Permission denied");
3899         }
3900         die_error('404 Not Found', "File name not defined") if (!$file_name);
3901         $hash_base ||= git_get_head_hash($project);
3902         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3903         my %co = parse_commit($hash_base)
3904                 or die_error(undef, "Reading commit failed");
3905         if (!defined $hash) {
3906                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3907                         or die_error(undef, "Error looking up file");
3908         }
3909         $ftype = git_get_type($hash);
3910         if ($ftype !~ "blob") {
3911                 die_error('400 Bad Request', "Object is not a blob");
3912         }
3913         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3914               $file_name, $hash_base)
3915                 or die_error(undef, "Open git-blame failed");
3916         git_header_html();
3917         my $formats_nav =
3918                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3919                         "blob") .
3920                 " | " .
3921                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3922                         "history") .
3923                 " | " .
3924                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3925                         "HEAD");
3926         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3927         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3928         git_print_page_path($file_name, $ftype, $hash_base);
3929         my @rev_color = (qw(light2 dark2));
3930         my $num_colors = scalar(@rev_color);
3931         my $current_color = 0;
3932         my $last_rev;
3933         print <<HTML;
3934 <div class="page_body">
3935 <table class="blame">
3936 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3937 HTML
3938         my %metainfo = ();
3939         while (1) {
3940                 $_ = <$fd>;
3941                 last unless defined $_;
3942                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3943                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3944                 if (!exists $metainfo{$full_rev}) {
3945                         $metainfo{$full_rev} = {};
3946                 }
3947                 my $meta = $metainfo{$full_rev};
3948                 while (<$fd>) {
3949                         last if (s/^\t//);
3950                         if (/^(\S+) (.*)$/) {
3951                                 $meta->{$1} = $2;
3952                         }
3953                 }
3954                 my $data = $_;
3955                 chomp $data;
3956                 my $rev = substr($full_rev, 0, 8);
3957                 my $author = $meta->{'author'};
3958                 my %date = parse_date($meta->{'author-time'},
3959                                       $meta->{'author-tz'});
3960                 my $date = $date{'iso-tz'};
3961                 if ($group_size) {
3962                         $current_color = ++$current_color % $num_colors;
3963                 }
3964                 print "<tr class=\"$rev_color[$current_color]\">\n";
3965                 if ($group_size) {
3966                         print "<td class=\"sha1\"";
3967                         print " title=\"". esc_html($author) . ", $date\"";
3968                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3969                         print ">";
3970                         print $cgi->a({-href => href(action=>"commit",
3971                                                      hash=>$full_rev,
3972                                                      file_name=>$file_name)},
3973                                       esc_html($rev));
3974                         print "</td>\n";
3975                 }
3976                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3977                         or die_error(undef, "Open git-rev-parse failed");
3978                 my $parent_commit = <$dd>;
3979                 close $dd;
3980                 chomp($parent_commit);
3981                 my $blamed = href(action => 'blame',
3982                                   file_name => $meta->{'filename'},
3983                                   hash_base => $parent_commit);
3984                 print "<td class=\"linenr\">";
3985                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3986                                 -id => "l$lineno",
3987                                 -class => "linenr" },
3988                               esc_html($lineno));
3989                 print "</td>";
3990                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3991                 print "</tr>\n";
3992         }
3993         print "</table>\n";
3994         print "</div>";
3995         close $fd
3996                 or print "Reading blob failed\n";
3997         git_footer_html();
3998 }
3999
4000 sub git_blame {
4001         my $fd;
4002
4003         my ($have_blame) = gitweb_check_feature('blame');
4004         if (!$have_blame) {
4005                 die_error('403 Permission denied', "Permission denied");
4006         }
4007         die_error('404 Not Found', "File name not defined") if (!$file_name);
4008         $hash_base ||= git_get_head_hash($project);
4009         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4010         my %co = parse_commit($hash_base)
4011                 or die_error(undef, "Reading commit failed");
4012         if (!defined $hash) {
4013                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4014                         or die_error(undef, "Error lookup file");
4015         }
4016         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4017                 or die_error(undef, "Open git-annotate failed");
4018         git_header_html();
4019         my $formats_nav =
4020                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4021                         "blob") .
4022                 " | " .
4023                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4024                         "history") .
4025                 " | " .
4026                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4027                         "HEAD");
4028         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4029         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4030         git_print_page_path($file_name, 'blob', $hash_base);
4031         print "<div class=\"page_body\">\n";
4032         print <<HTML;
4033 <table class="blame">
4034   <tr>
4035     <th>Commit</th>
4036     <th>Age</th>
4037     <th>Author</th>
4038     <th>Line</th>
4039     <th>Data</th>
4040   </tr>
4041 HTML
4042         my @line_class = (qw(light dark));
4043         my $line_class_len = scalar (@line_class);
4044         my $line_class_num = $#line_class;
4045         while (my $line = <$fd>) {
4046                 my $long_rev;
4047                 my $short_rev;
4048                 my $author;
4049                 my $time;
4050                 my $lineno;
4051                 my $data;
4052                 my $age;
4053                 my $age_str;
4054                 my $age_class;
4055
4056                 chomp $line;
4057                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4058
4059                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4060                         $long_rev = $1;
4061                         $author   = $2;
4062                         $time     = $3;
4063                         $lineno   = $4;
4064                         $data     = $5;
4065                 } else {
4066                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4067                         next;
4068                 }
4069                 $short_rev  = substr ($long_rev, 0, 8);
4070                 $age        = time () - $time;
4071                 $age_str    = age_string ($age);
4072                 $age_str    =~ s/ /&nbsp;/g;
4073                 $age_class  = age_class($age);
4074                 $author     = esc_html ($author);
4075                 $author     =~ s/ /&nbsp;/g;
4076
4077                 $data = untabify($data);
4078                 $data = esc_html ($data);
4079
4080                 print <<HTML;
4081   <tr class="$line_class[$line_class_num]">
4082     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4083     <td class="$age_class">$age_str</td>
4084     <td>$author</td>
4085     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4086     <td class="pre">$data</td>
4087   </tr>
4088 HTML
4089         } # while (my $line = <$fd>)
4090         print "</table>\n\n";
4091         close $fd
4092                 or print "Reading blob failed.\n";
4093         print "</div>";
4094         git_footer_html();
4095 }
4096
4097 sub git_tags {
4098         my $head = git_get_head_hash($project);
4099         git_header_html();
4100         git_print_page_nav('','', $head,undef,$head);
4101         git_print_header_div('summary', $project);
4102
4103         my @tagslist = git_get_tags_list();
4104         if (@tagslist) {
4105                 git_tags_body(\@tagslist);
4106         }
4107         git_footer_html();
4108 }
4109
4110 sub git_heads {
4111         my $head = git_get_head_hash($project);
4112         git_header_html();
4113         git_print_page_nav('','', $head,undef,$head);
4114         git_print_header_div('summary', $project);
4115
4116         my @headslist = git_get_heads_list();
4117         if (@headslist) {
4118                 git_heads_body(\@headslist, $head);
4119         }
4120         git_footer_html();
4121 }
4122
4123 sub git_blob_plain {
4124         my $expires;
4125
4126         if (!defined $hash) {
4127                 if (defined $file_name) {
4128                         my $base = $hash_base || git_get_head_hash($project);
4129                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4130                                 or die_error(undef, "Error lookup file");
4131                 } else {
4132                         die_error(undef, "No file name defined");
4133                 }
4134         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4135                 # blobs defined by non-textual hash id's can be cached
4136                 $expires = "+1d";
4137         }
4138
4139         my $type = shift;
4140         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4141                 or die_error(undef, "Couldn't cat $file_name, $hash");
4142
4143         $type ||= blob_mimetype($fd, $file_name);
4144
4145         # save as filename, even when no $file_name is given
4146         my $save_as = "$hash";
4147         if (defined $file_name) {
4148                 $save_as = $file_name;
4149         } elsif ($type =~ m/^text\//) {
4150                 $save_as .= '.txt';
4151         }
4152
4153         print $cgi->header(
4154                 -type => "$type",
4155                 -expires=>$expires,
4156                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4157         undef $/;
4158         binmode STDOUT, ':raw';
4159         print <$fd>;
4160         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4161         $/ = "\n";
4162         close $fd;
4163 }
4164
4165 sub git_blob {
4166         my $expires;
4167
4168         if (!defined $hash) {
4169                 if (defined $file_name) {
4170                         my $base = $hash_base || git_get_head_hash($project);
4171                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4172                                 or die_error(undef, "Error lookup file");
4173                 } else {
4174                         die_error(undef, "No file name defined");
4175                 }
4176         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4177                 # blobs defined by non-textual hash id's can be cached
4178                 $expires = "+1d";
4179         }
4180
4181         my ($have_blame) = gitweb_check_feature('blame');
4182         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4183                 or die_error(undef, "Couldn't cat $file_name, $hash");
4184         my $mimetype = blob_mimetype($fd, $file_name);
4185         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4186                 close $fd;
4187                 return git_blob_plain($mimetype);
4188         }
4189         # we can have blame only for text/* mimetype
4190         $have_blame &&= ($mimetype =~ m!^text/!);
4191
4192         git_header_html(undef, $expires);
4193         my $formats_nav = '';
4194         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4195                 if (defined $file_name) {
4196                         if ($have_blame) {
4197                                 $formats_nav .=
4198                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4199                                                                hash=>$hash, file_name=>$file_name)},
4200                                                 "blame") .
4201                                         " | ";
4202                         }
4203                         $formats_nav .=
4204                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4205                                                        hash=>$hash, file_name=>$file_name)},
4206                                         "history") .
4207                                 " | " .
4208                                 $cgi->a({-href => href(action=>"blob_plain",
4209                                                        hash=>$hash, file_name=>$file_name)},
4210                                         "raw") .
4211                                 " | " .
4212                                 $cgi->a({-href => href(action=>"blob",
4213                                                        hash_base=>"HEAD", file_name=>$file_name)},
4214                                         "HEAD");
4215                 } else {
4216                         $formats_nav .=
4217                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4218                 }
4219                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4220                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4221         } else {
4222                 print "<div class=\"page_nav\">\n" .
4223                       "<br/><br/></div>\n" .
4224                       "<div class=\"title\">$hash</div>\n";
4225         }
4226         git_print_page_path($file_name, "blob", $hash_base);
4227         print "<div class=\"page_body\">\n";
4228         if ($mimetype =~ m!^text/!) {
4229                 my $nr;
4230                 while (my $line = <$fd>) {
4231                         chomp $line;
4232                         $nr++;
4233                         $line = untabify($line);
4234                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4235                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4236                 }
4237         } elsif ($mimetype =~ m!^image/!) {
4238                 print qq!<img type="$mimetype"!;
4239                 if ($file_name) {
4240                         print qq! alt="$file_name" title="$file_name"!;
4241                 }
4242                 print qq! src="! .
4243                       href(action=>"blob_plain", hash=>$hash,
4244                            hash_base=>$hash_base, file_name=>$file_name) .
4245                       qq!" />\n!;
4246         }
4247         close $fd
4248                 or print "Reading blob failed.\n";
4249         print "</div>";
4250         git_footer_html();
4251 }
4252
4253 sub git_tree {
4254         if (!defined $hash_base) {
4255                 $hash_base = "HEAD";
4256         }
4257         if (!defined $hash) {
4258                 if (defined $file_name) {
4259                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4260                 } else {
4261                         $hash = $hash_base;
4262                 }
4263         }
4264         $/ = "\0";
4265         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4266                 or die_error(undef, "Open git-ls-tree failed");
4267         my @entries = map { chomp; $_ } <$fd>;
4268         close $fd or die_error(undef, "Reading tree failed");
4269         $/ = "\n";
4270
4271         my $refs = git_get_references();
4272         my $ref = format_ref_marker($refs, $hash_base);
4273         git_header_html();
4274         my $basedir = '';
4275         my ($have_blame) = gitweb_check_feature('blame');
4276         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4277                 my @views_nav = ();
4278                 if (defined $file_name) {
4279                         push @views_nav,
4280                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4281                                                        hash=>$hash, file_name=>$file_name)},
4282                                         "history"),
4283                                 $cgi->a({-href => href(action=>"tree",
4284                                                        hash_base=>"HEAD", file_name=>$file_name)},
4285                                         "HEAD"),
4286                 }
4287                 my $snapshot_links = format_snapshot_links($hash);
4288                 if (defined $snapshot_links) {
4289                         # FIXME: Should be available when we have no hash base as well.
4290                         push @views_nav, $snapshot_links;
4291                 }
4292                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4293                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4294         } else {
4295                 undef $hash_base;
4296                 print "<div class=\"page_nav\">\n";
4297                 print "<br/><br/></div>\n";
4298                 print "<div class=\"title\">$hash</div>\n";
4299         }
4300         if (defined $file_name) {
4301                 $basedir = $file_name;
4302                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4303                         $basedir .= '/';
4304                 }
4305         }
4306         git_print_page_path($file_name, 'tree', $hash_base);
4307         print "<div class=\"page_body\">\n";
4308         print "<table cellspacing=\"0\">\n";
4309         my $alternate = 1;
4310         # '..' (top directory) link if possible
4311         if (defined $hash_base &&
4312             defined $file_name && $file_name =~ m![^/]+$!) {
4313                 if ($alternate) {
4314                         print "<tr class=\"dark\">\n";
4315                 } else {
4316                         print "<tr class=\"light\">\n";
4317                 }
4318                 $alternate ^= 1;
4319
4320                 my $up = $file_name;
4321                 $up =~ s!/?[^/]+$!!;
4322                 undef $up unless $up;
4323                 # based on git_print_tree_entry
4324                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4325                 print '<td class="list">';
4326                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4327                                              file_name=>$up)},
4328                               "..");
4329                 print "</td>\n";
4330                 print "<td class=\"link\"></td>\n";
4331
4332                 print "</tr>\n";
4333         }
4334         foreach my $line (@entries) {
4335                 my %t = parse_ls_tree_line($line, -z => 1);
4336
4337                 if ($alternate) {
4338                         print "<tr class=\"dark\">\n";
4339                 } else {
4340                         print "<tr class=\"light\">\n";
4341                 }
4342                 $alternate ^= 1;
4343
4344                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4345
4346                 print "</tr>\n";
4347         }
4348         print "</table>\n" .
4349               "</div>";
4350         git_footer_html();
4351 }
4352
4353 sub git_snapshot {
4354         my @supported_fmts = gitweb_check_feature('snapshot');
4355         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4356
4357         my $format = $cgi->param('sf');
4358         if (!@supported_fmts) {
4359                 die_error('403 Permission denied', "Permission denied");
4360         }
4361         # default to first supported snapshot format
4362         $format ||= $supported_fmts[0];
4363         if ($format !~ m/^[a-z0-9]+$/) {
4364                 die_error(undef, "Invalid snapshot format parameter");
4365         } elsif (!exists($known_snapshot_formats{$format})) {
4366                 die_error(undef, "Unknown snapshot format");
4367         } elsif (!grep($_ eq $format, @supported_fmts)) {
4368                 die_error(undef, "Unsupported snapshot format");
4369         }
4370
4371         if (!defined $hash) {
4372                 $hash = git_get_head_hash($project);
4373         }
4374
4375         my $git_command = git_cmd_str();
4376         my $name = $project;
4377         $name =~ s,([^/])/*\.git$,$1,;
4378         $name = basename($name);
4379         my $filename = to_utf8($name);
4380         $name =~ s/\047/\047\\\047\047/g;
4381         my $cmd;
4382         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4383         $cmd = "$git_command archive " .
4384                 "--format=$known_snapshot_formats{$format}{'format'} " .
4385                 "--prefix=\'$name\'/ $hash";
4386         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4387                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4388         }
4389
4390         print $cgi->header(
4391                 -type => $known_snapshot_formats{$format}{'type'},
4392                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4393                 -status => '200 OK');
4394
4395         open my $fd, "-|", $cmd
4396                 or die_error(undef, "Execute git-archive failed");
4397         binmode STDOUT, ':raw';
4398         print <$fd>;
4399         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4400         close $fd;
4401 }
4402
4403 sub git_log {
4404         my $head = git_get_head_hash($project);
4405         if (!defined $hash) {
4406                 $hash = $head;
4407         }
4408         if (!defined $page) {
4409                 $page = 0;
4410         }
4411         my $refs = git_get_references();
4412
4413         my @commitlist = parse_commits($hash, 101, (100 * $page));
4414
4415         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4416
4417         git_header_html();
4418         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4419
4420         if (!@commitlist) {
4421                 my %co = parse_commit($hash);
4422
4423                 git_print_header_div('summary', $project);
4424                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4425         }
4426         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4427         for (my $i = 0; $i <= $to; $i++) {
4428                 my %co = %{$commitlist[$i]};
4429                 next if !%co;
4430                 my $commit = $co{'id'};
4431                 my $ref = format_ref_marker($refs, $commit);
4432                 my %ad = parse_date($co{'author_epoch'});
4433                 git_print_header_div('commit',
4434                                "<span class=\"age\">$co{'age_string'}</span>" .
4435                                esc_html($co{'title'}) . $ref,
4436                                $commit);
4437                 print "<div class=\"title_text\">\n" .
4438                       "<div class=\"log_link\">\n" .
4439                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4440                       " | " .
4441                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4442                       " | " .
4443                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4444                       "<br/>\n" .
4445                       "</div>\n" .
4446                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4447                       "</div>\n";
4448
4449                 print "<div class=\"log_body\">\n";
4450                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4451                 print "</div>\n";
4452         }
4453         if ($#commitlist >= 100) {
4454                 print "<div class=\"page_nav\">\n";
4455                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4456                                -accesskey => "n", -title => "Alt-n"}, "next");
4457                 print "</div>\n";
4458         }
4459         git_footer_html();
4460 }
4461
4462 sub git_commit {
4463         $hash ||= $hash_base || "HEAD";
4464         my %co = parse_commit($hash);
4465         if (!%co) {
4466                 die_error(undef, "Unknown commit object");
4467         }
4468         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4469         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4470
4471         my $parent  = $co{'parent'};
4472         my $parents = $co{'parents'}; # listref
4473
4474         # we need to prepare $formats_nav before any parameter munging
4475         my $formats_nav;
4476         if (!defined $parent) {
4477                 # --root commitdiff
4478                 $formats_nav .= '(initial)';
4479         } elsif (@$parents == 1) {
4480                 # single parent commit
4481                 $formats_nav .=
4482                         '(parent: ' .
4483                         $cgi->a({-href => href(action=>"commit",
4484                                                hash=>$parent)},
4485                                 esc_html(substr($parent, 0, 7))) .
4486                         ')';
4487         } else {
4488                 # merge commit
4489                 $formats_nav .=
4490                         '(merge: ' .
4491                         join(' ', map {
4492                                 $cgi->a({-href => href(action=>"commit",
4493                                                        hash=>$_)},
4494                                         esc_html(substr($_, 0, 7)));
4495                         } @$parents ) .
4496                         ')';
4497         }
4498
4499         if (!defined $parent) {
4500                 $parent = "--root";
4501         }
4502         my @difftree;
4503         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4504                 @diff_opts,
4505                 (@$parents <= 1 ? $parent : '-c'),
4506                 $hash, "--"
4507                 or die_error(undef, "Open git-diff-tree failed");
4508         @difftree = map { chomp; $_ } <$fd>;
4509         close $fd or die_error(undef, "Reading git-diff-tree failed");
4510
4511         # non-textual hash id's can be cached
4512         my $expires;
4513         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4514                 $expires = "+1d";
4515         }
4516         my $refs = git_get_references();
4517         my $ref = format_ref_marker($refs, $co{'id'});
4518
4519         git_header_html(undef, $expires);
4520         git_print_page_nav('commit', '',
4521                            $hash, $co{'tree'}, $hash,
4522                            $formats_nav);
4523
4524         if (defined $co{'parent'}) {
4525                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4526         } else {
4527                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4528         }
4529         print "<div class=\"title_text\">\n" .
4530               "<table cellspacing=\"0\">\n";
4531         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4532               "<tr>" .
4533               "<td></td><td> $ad{'rfc2822'}";
4534         if ($ad{'hour_local'} < 6) {
4535                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4536                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4537         } else {
4538                 printf(" (%02d:%02d %s)",
4539                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4540         }
4541         print "</td>" .
4542               "</tr>\n";
4543         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4544         print "<tr><td></td><td> $cd{'rfc2822'}" .
4545               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4546               "</td></tr>\n";
4547         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4548         print "<tr>" .
4549               "<td>tree</td>" .
4550               "<td class=\"sha1\">" .
4551               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4552                        class => "list"}, $co{'tree'}) .
4553               "</td>" .
4554               "<td class=\"link\">" .
4555               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4556                       "tree");
4557         my $snapshot_links = format_snapshot_links($hash);
4558         if (defined $snapshot_links) {
4559                 print " | " . $snapshot_links;
4560         }
4561         print "</td>" .
4562               "</tr>\n";
4563
4564         foreach my $par (@$parents) {
4565                 print "<tr>" .
4566                       "<td>parent</td>" .
4567                       "<td class=\"sha1\">" .
4568                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4569                                class => "list"}, $par) .
4570                       "</td>" .
4571                       "<td class=\"link\">" .
4572                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4573                       " | " .
4574                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4575                       "</td>" .
4576                       "</tr>\n";
4577         }
4578         print "</table>".
4579               "</div>\n";
4580
4581         print "<div class=\"page_body\">\n";
4582         git_print_log($co{'comment'});
4583         print "</div>\n";
4584
4585         git_difftree_body(\@difftree, $hash, @$parents);
4586
4587         git_footer_html();
4588 }
4589
4590 sub git_object {
4591         # object is defined by:
4592         # - hash or hash_base alone
4593         # - hash_base and file_name
4594         my $type;
4595
4596         # - hash or hash_base alone
4597         if ($hash || ($hash_base && !defined $file_name)) {
4598                 my $object_id = $hash || $hash_base;
4599
4600                 my $git_command = git_cmd_str();
4601                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4602                         or die_error('404 Not Found', "Object does not exist");
4603                 $type = <$fd>;
4604                 chomp $type;
4605                 close $fd
4606                         or die_error('404 Not Found', "Object does not exist");
4607
4608         # - hash_base and file_name
4609         } elsif ($hash_base && defined $file_name) {
4610                 $file_name =~ s,/+$,,;
4611
4612                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4613                         or die_error('404 Not Found', "Base object does not exist");
4614
4615                 # here errors should not hapen
4616                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4617                         or die_error(undef, "Open git-ls-tree failed");
4618                 my $line = <$fd>;
4619                 close $fd;
4620
4621                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4622                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4623                         die_error('404 Not Found', "File or directory for given base does not exist");
4624                 }
4625                 $type = $2;
4626                 $hash = $3;
4627         } else {
4628                 die_error('404 Not Found', "Not enough information to find object");
4629         }
4630
4631         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4632                                           hash=>$hash, hash_base=>$hash_base,
4633                                           file_name=>$file_name),
4634                              -status => '302 Found');
4635 }
4636
4637 sub git_blobdiff {
4638         my $format = shift || 'html';
4639
4640         my $fd;
4641         my @difftree;
4642         my %diffinfo;
4643         my $expires;
4644
4645         # preparing $fd and %diffinfo for git_patchset_body
4646         # new style URI
4647         if (defined $hash_base && defined $hash_parent_base) {
4648                 if (defined $file_name) {
4649                         # read raw output
4650                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4651                                 $hash_parent_base, $hash_base,
4652                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4653                                 or die_error(undef, "Open git-diff-tree failed");
4654                         @difftree = map { chomp; $_ } <$fd>;
4655                         close $fd
4656                                 or die_error(undef, "Reading git-diff-tree failed");
4657                         @difftree
4658                                 or die_error('404 Not Found', "Blob diff not found");
4659
4660                 } elsif (defined $hash &&
4661                          $hash =~ /[0-9a-fA-F]{40}/) {
4662                         # try to find filename from $hash
4663
4664                         # read filtered raw output
4665                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4666                                 $hash_parent_base, $hash_base, "--"
4667                                 or die_error(undef, "Open git-diff-tree failed");
4668                         @difftree =
4669                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4670                                 # $hash == to_id
4671                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4672                                 map { chomp; $_ } <$fd>;
4673                         close $fd
4674                                 or die_error(undef, "Reading git-diff-tree failed");
4675                         @difftree
4676                                 or die_error('404 Not Found', "Blob diff not found");
4677
4678                 } else {
4679                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4680                 }
4681
4682                 if (@difftree > 1) {
4683                         die_error('404 Not Found', "Ambiguous blob diff specification");
4684                 }
4685
4686                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4687                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4688                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4689
4690                 $hash_parent ||= $diffinfo{'from_id'};
4691                 $hash        ||= $diffinfo{'to_id'};
4692
4693                 # non-textual hash id's can be cached
4694                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4695                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4696                         $expires = '+1d';
4697                 }
4698
4699                 # open patch output
4700                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4701                         '-p', ($format eq 'html' ? "--full-index" : ()),
4702                         $hash_parent_base, $hash_base,
4703                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4704                         or die_error(undef, "Open git-diff-tree failed");
4705         }
4706
4707         # old/legacy style URI
4708         if (!%diffinfo && # if new style URI failed
4709             defined $hash && defined $hash_parent) {
4710                 # fake git-diff-tree raw output
4711                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4712                 $diffinfo{'from_id'} = $hash_parent;
4713                 $diffinfo{'to_id'}   = $hash;
4714                 if (defined $file_name) {
4715                         if (defined $file_parent) {
4716                                 $diffinfo{'status'} = '2';
4717                                 $diffinfo{'from_file'} = $file_parent;
4718                                 $diffinfo{'to_file'}   = $file_name;
4719                         } else { # assume not renamed
4720                                 $diffinfo{'status'} = '1';
4721                                 $diffinfo{'from_file'} = $file_name;
4722                                 $diffinfo{'to_file'}   = $file_name;
4723                         }
4724                 } else { # no filename given
4725                         $diffinfo{'status'} = '2';
4726                         $diffinfo{'from_file'} = $hash_parent;
4727                         $diffinfo{'to_file'}   = $hash;
4728                 }
4729
4730                 # non-textual hash id's can be cached
4731                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4732                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4733                         $expires = '+1d';
4734                 }
4735
4736                 # open patch output
4737                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4738                         '-p', ($format eq 'html' ? "--full-index" : ()),
4739                         $hash_parent, $hash, "--"
4740                         or die_error(undef, "Open git-diff failed");
4741         } else  {
4742                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4743                         unless %diffinfo;
4744         }
4745
4746         # header
4747         if ($format eq 'html') {
4748                 my $formats_nav =
4749                         $cgi->a({-href => href(action=>"blobdiff_plain",
4750                                                hash=>$hash, hash_parent=>$hash_parent,
4751                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4752                                                file_name=>$file_name, file_parent=>$file_parent)},
4753                                 "raw");
4754                 git_header_html(undef, $expires);
4755                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4756                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4757                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4758                 } else {
4759                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4760                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4761                 }
4762                 if (defined $file_name) {
4763                         git_print_page_path($file_name, "blob", $hash_base);
4764                 } else {
4765                         print "<div class=\"page_path\"></div>\n";
4766                 }
4767
4768         } elsif ($format eq 'plain') {
4769                 print $cgi->header(
4770                         -type => 'text/plain',
4771                         -charset => 'utf-8',
4772                         -expires => $expires,
4773                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4774
4775                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4776
4777         } else {
4778                 die_error(undef, "Unknown blobdiff format");
4779         }
4780
4781         # patch
4782         if ($format eq 'html') {
4783                 print "<div class=\"page_body\">\n";
4784
4785                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4786                 close $fd;
4787
4788                 print "</div>\n"; # class="page_body"
4789                 git_footer_html();
4790
4791         } else {
4792                 while (my $line = <$fd>) {
4793                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4794                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4795
4796                         print $line;
4797
4798                         last if $line =~ m!^\+\+\+!;
4799                 }
4800                 local $/ = undef;
4801                 print <$fd>;
4802                 close $fd;
4803         }
4804 }
4805
4806 sub git_blobdiff_plain {
4807         git_blobdiff('plain');
4808 }
4809
4810 sub git_commitdiff {
4811         my $format = shift || 'html';
4812         $hash ||= $hash_base || "HEAD";
4813         my %co = parse_commit($hash);
4814         if (!%co) {
4815                 die_error(undef, "Unknown commit object");
4816         }
4817
4818         # choose format for commitdiff for merge
4819         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4820                 $hash_parent = '--cc';
4821         }
4822         # we need to prepare $formats_nav before almost any parameter munging
4823         my $formats_nav;
4824         if ($format eq 'html') {
4825                 $formats_nav =
4826                         $cgi->a({-href => href(action=>"commitdiff_plain",
4827                                                hash=>$hash, hash_parent=>$hash_parent)},
4828                                 "raw");
4829
4830                 if (defined $hash_parent &&
4831                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4832                         # commitdiff with two commits given
4833                         my $hash_parent_short = $hash_parent;
4834                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4835                                 $hash_parent_short = substr($hash_parent, 0, 7);
4836                         }
4837                         $formats_nav .=
4838                                 ' (from';
4839                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4840                                 if ($co{'parents'}[$i] eq $hash_parent) {
4841                                         $formats_nav .= ' parent ' . ($i+1);
4842                                         last;
4843                                 }
4844                         }
4845                         $formats_nav .= ': ' .
4846                                 $cgi->a({-href => href(action=>"commitdiff",
4847                                                        hash=>$hash_parent)},
4848                                         esc_html($hash_parent_short)) .
4849                                 ')';
4850                 } elsif (!$co{'parent'}) {
4851                         # --root commitdiff
4852                         $formats_nav .= ' (initial)';
4853                 } elsif (scalar @{$co{'parents'}} == 1) {
4854                         # single parent commit
4855                         $formats_nav .=
4856                                 ' (parent: ' .
4857                                 $cgi->a({-href => href(action=>"commitdiff",
4858                                                        hash=>$co{'parent'})},
4859                                         esc_html(substr($co{'parent'}, 0, 7))) .
4860                                 ')';
4861                 } else {
4862                         # merge commit
4863                         if ($hash_parent eq '--cc') {
4864                                 $formats_nav .= ' | ' .
4865                                         $cgi->a({-href => href(action=>"commitdiff",
4866                                                                hash=>$hash, hash_parent=>'-c')},
4867                                                 'combined');
4868                         } else { # $hash_parent eq '-c'
4869                                 $formats_nav .= ' | ' .
4870                                         $cgi->a({-href => href(action=>"commitdiff",
4871                                                                hash=>$hash, hash_parent=>'--cc')},
4872                                                 'compact');
4873                         }
4874                         $formats_nav .=
4875                                 ' (merge: ' .
4876                                 join(' ', map {
4877                                         $cgi->a({-href => href(action=>"commitdiff",
4878                                                                hash=>$_)},
4879                                                 esc_html(substr($_, 0, 7)));
4880                                 } @{$co{'parents'}} ) .
4881                                 ')';
4882                 }
4883         }
4884
4885         my $hash_parent_param = $hash_parent;
4886         if (!defined $hash_parent_param) {
4887                 # --cc for multiple parents, --root for parentless
4888                 $hash_parent_param =
4889                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4890         }
4891
4892         # read commitdiff
4893         my $fd;
4894         my @difftree;
4895         if ($format eq 'html') {
4896                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4897                         "--no-commit-id", "--patch-with-raw", "--full-index",
4898                         $hash_parent_param, $hash, "--"
4899                         or die_error(undef, "Open git-diff-tree failed");
4900
4901                 while (my $line = <$fd>) {
4902                         chomp $line;
4903                         # empty line ends raw part of diff-tree output
4904                         last unless $line;
4905                         push @difftree, scalar parse_difftree_raw_line($line);
4906                 }
4907
4908         } elsif ($format eq 'plain') {
4909                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4910                         '-p', $hash_parent_param, $hash, "--"
4911                         or die_error(undef, "Open git-diff-tree failed");
4912
4913         } else {
4914                 die_error(undef, "Unknown commitdiff format");
4915         }
4916
4917         # non-textual hash id's can be cached
4918         my $expires;
4919         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4920                 $expires = "+1d";
4921         }
4922
4923         # write commit message
4924         if ($format eq 'html') {
4925                 my $refs = git_get_references();
4926                 my $ref = format_ref_marker($refs, $co{'id'});
4927
4928                 git_header_html(undef, $expires);
4929                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4930                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4931                 git_print_authorship(\%co);
4932                 print "<div class=\"page_body\">\n";
4933                 if (@{$co{'comment'}} > 1) {
4934                         print "<div class=\"log\">\n";
4935                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4936                         print "</div>\n"; # class="log"
4937                 }
4938
4939         } elsif ($format eq 'plain') {
4940                 my $refs = git_get_references("tags");
4941                 my $tagname = git_get_rev_name_tags($hash);
4942                 my $filename = basename($project) . "-$hash.patch";
4943
4944                 print $cgi->header(
4945                         -type => 'text/plain',
4946                         -charset => 'utf-8',
4947                         -expires => $expires,
4948                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4949                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4950                 print <<TEXT;
4951 From: $co{'author'}
4952 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4953 Subject: $co{'title'}
4954 TEXT
4955                 print "X-Git-Tag: $tagname\n" if $tagname;
4956                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4957
4958                 foreach my $line (@{$co{'comment'}}) {
4959                         print "$line\n";
4960                 }
4961                 print "---\n\n";
4962         }
4963
4964         # write patch
4965         if ($format eq 'html') {
4966                 my $use_parents = !defined $hash_parent ||
4967                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4968                 git_difftree_body(\@difftree, $hash,
4969                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4970                 print "<br/>\n";
4971
4972                 git_patchset_body($fd, \@difftree, $hash,
4973                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4974                 close $fd;
4975                 print "</div>\n"; # class="page_body"
4976                 git_footer_html();
4977
4978         } elsif ($format eq 'plain') {
4979                 local $/ = undef;
4980                 print <$fd>;
4981                 close $fd
4982                         or print "Reading git-diff-tree failed\n";
4983         }
4984 }
4985
4986 sub git_commitdiff_plain {
4987         git_commitdiff('plain');
4988 }
4989
4990 sub git_history {
4991         if (!defined $hash_base) {
4992                 $hash_base = git_get_head_hash($project);
4993         }
4994         if (!defined $page) {
4995                 $page = 0;
4996         }
4997         my $ftype;
4998         my %co = parse_commit($hash_base);
4999         if (!%co) {
5000                 die_error(undef, "Unknown commit object");
5001         }
5002
5003         my $refs = git_get_references();
5004         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5005
5006         if (!defined $hash && defined $file_name) {
5007                 $hash = git_get_hash_by_path($hash_base, $file_name);
5008         }
5009         if (defined $hash) {
5010                 $ftype = git_get_type($hash);
5011         }
5012
5013         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5014
5015         my $paging_nav = '';
5016         if ($page > 0) {
5017                 $paging_nav .=
5018                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5019                                                file_name=>$file_name)},
5020                                 "first");
5021                 $paging_nav .= " &sdot; " .
5022                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5023                                                file_name=>$file_name, page=>$page-1),
5024                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5025         } else {
5026                 $paging_nav .= "first";
5027                 $paging_nav .= " &sdot; prev";
5028         }
5029         if ($#commitlist >= 100) {
5030                 $paging_nav .= " &sdot; " .
5031                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5032                                                file_name=>$file_name, page=>$page+1),
5033                                  -accesskey => "n", -title => "Alt-n"}, "next");
5034         } else {
5035                 $paging_nav .= " &sdot; next";
5036         }
5037         my $next_link = '';
5038         if ($#commitlist >= 100) {
5039                 $next_link =
5040                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5041                                                file_name=>$file_name, page=>$page+1),
5042                                  -accesskey => "n", -title => "Alt-n"}, "next");
5043         }
5044
5045         git_header_html();
5046         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5047         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5048         git_print_page_path($file_name, $ftype, $hash_base);
5049
5050         git_history_body(\@commitlist, 0, 99,
5051                          $refs, $hash_base, $ftype, $next_link);
5052
5053         git_footer_html();
5054 }
5055
5056 sub git_search {
5057         my ($have_search) = gitweb_check_feature('search');
5058         if (!$have_search) {
5059                 die_error('403 Permission denied', "Permission denied");
5060         }
5061         if (!defined $searchtext) {
5062                 die_error(undef, "Text field empty");
5063         }
5064         if (!defined $hash) {
5065                 $hash = git_get_head_hash($project);
5066         }
5067         my %co = parse_commit($hash);
5068         if (!%co) {
5069                 die_error(undef, "Unknown commit object");
5070         }
5071         if (!defined $page) {
5072                 $page = 0;
5073         }
5074
5075         $searchtype ||= 'commit';
5076         if ($searchtype eq 'pickaxe') {
5077                 # pickaxe may take all resources of your box and run for several minutes
5078                 # with every query - so decide by yourself how public you make this feature
5079                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5080                 if (!$have_pickaxe) {
5081                         die_error('403 Permission denied', "Permission denied");
5082                 }
5083         }
5084         if ($searchtype eq 'grep') {
5085                 my ($have_grep) = gitweb_check_feature('grep');
5086                 if (!$have_grep) {
5087                         die_error('403 Permission denied', "Permission denied");
5088                 }
5089         }
5090
5091         git_header_html();
5092
5093         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5094                 my $greptype;
5095                 if ($searchtype eq 'commit') {
5096                         $greptype = "--grep=";
5097                 } elsif ($searchtype eq 'author') {
5098                         $greptype = "--author=";
5099                 } elsif ($searchtype eq 'committer') {
5100                         $greptype = "--committer=";
5101                 }
5102                 $greptype .= $search_regexp;
5103                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5104
5105                 my $paging_nav = '';
5106                 if ($page > 0) {
5107                         $paging_nav .=
5108                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5109                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5110                                         "first");
5111                         $paging_nav .= " &sdot; " .
5112                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5113                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5114                                                        page=>$page-1),
5115                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5116                 } else {
5117                         $paging_nav .= "first";
5118                         $paging_nav .= " &sdot; prev";
5119                 }
5120                 if ($#commitlist >= 100) {
5121                         $paging_nav .= " &sdot; " .
5122                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5123                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5124                                                        page=>$page+1),
5125                                          -accesskey => "n", -title => "Alt-n"}, "next");
5126                 } else {
5127                         $paging_nav .= " &sdot; next";
5128                 }
5129                 my $next_link = '';
5130                 if ($#commitlist >= 100) {
5131                         $next_link =
5132                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5133                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5134                                                        page=>$page+1),
5135                                          -accesskey => "n", -title => "Alt-n"}, "next");
5136                 }
5137
5138                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5139                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5140                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5141         }
5142
5143         if ($searchtype eq 'pickaxe') {
5144                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5145                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5146
5147                 print "<table cellspacing=\"0\">\n";
5148                 my $alternate = 1;
5149                 $/ = "\n";
5150                 my $git_command = git_cmd_str();
5151                 my $searchqtext = $searchtext;
5152                 $searchqtext =~ s/'/'\\''/;
5153                 open my $fd, "-|", "$git_command rev-list $hash | " .
5154                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5155                 undef %co;
5156                 my @files;
5157                 while (my $line = <$fd>) {
5158                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5159                                 my %set;
5160                                 $set{'file'} = $6;
5161                                 $set{'from_id'} = $3;
5162                                 $set{'to_id'} = $4;
5163                                 $set{'id'} = $set{'to_id'};
5164                                 if ($set{'id'} =~ m/0{40}/) {
5165                                         $set{'id'} = $set{'from_id'};
5166                                 }
5167                                 if ($set{'id'} =~ m/0{40}/) {
5168                                         next;
5169                                 }
5170                                 push @files, \%set;
5171                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5172                                 if (%co) {
5173                                         if ($alternate) {
5174                                                 print "<tr class=\"dark\">\n";
5175                                         } else {
5176                                                 print "<tr class=\"light\">\n";
5177                                         }
5178                                         $alternate ^= 1;
5179                                         my $author = chop_str($co{'author_name'}, 15, 5);
5180                                         if ($author ne $co{'author_name'}) {
5181                                                 $author = "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
5182                                         } else {
5183                                                 $author = esc_html($author);
5184                                         }
5185                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5186                                               "<td><i>" . $author . "</i></td>\n" .
5187                                               "<td>" .
5188                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5189                                                       -class => "list subject"},
5190                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5191                                         while (my $setref = shift @files) {
5192                                                 my %set = %$setref;
5193                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5194                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5195                                                               -class => "list"},
5196                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5197                                                       "<br/>\n";
5198                                         }
5199                                         print "</td>\n" .
5200                                               "<td class=\"link\">" .
5201                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5202                                               " | " .
5203                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5204                                         print "</td>\n" .
5205                                               "</tr>\n";
5206                                 }
5207                                 %co = parse_commit($1);
5208                         }
5209                 }
5210                 close $fd;
5211
5212                 print "</table>\n";
5213         }
5214
5215         if ($searchtype eq 'grep') {
5216                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5217                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5218
5219                 print "<table cellspacing=\"0\">\n";
5220                 my $alternate = 1;
5221                 my $matches = 0;
5222                 $/ = "\n";
5223                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5224                 my $lastfile = '';
5225                 while (my $line = <$fd>) {
5226                         chomp $line;
5227                         my ($file, $lno, $ltext, $binary);
5228                         last if ($matches++ > 1000);
5229                         if ($line =~ /^Binary file (.+) matches$/) {
5230                                 $file = $1;
5231                                 $binary = 1;
5232                         } else {
5233                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5234                         }
5235                         if ($file ne $lastfile) {
5236                                 $lastfile and print "</td></tr>\n";
5237                                 if ($alternate++) {
5238                                         print "<tr class=\"dark\">\n";
5239                                 } else {
5240                                         print "<tr class=\"light\">\n";
5241                                 }
5242                                 print "<td class=\"list\">".
5243                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5244                                                                file_name=>"$file"),
5245                                                 -class => "list"}, esc_path($file));
5246                                 print "</td><td>\n";
5247                                 $lastfile = $file;
5248                         }
5249                         if ($binary) {
5250                                 print "<div class=\"binary\">Binary file</div>\n";
5251                         } else {
5252                                 $ltext = untabify($ltext);
5253                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5254                                         $ltext = esc_html($1, -nbsp=>1);
5255                                         $ltext .= '<span class="match">';
5256                                         $ltext .= esc_html($2, -nbsp=>1);
5257                                         $ltext .= '</span>';
5258                                         $ltext .= esc_html($3, -nbsp=>1);
5259                                 } else {
5260                                         $ltext = esc_html($ltext, -nbsp=>1);
5261                                 }
5262                                 print "<div class=\"pre\">" .
5263                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5264                                                                file_name=>"$file").'#l'.$lno,
5265                                                 -class => "linenr"}, sprintf('%4i', $lno))
5266                                         . ' ' .  $ltext . "</div>\n";
5267                         }
5268                 }
5269                 if ($lastfile) {
5270                         print "</td></tr>\n";
5271                         if ($matches > 1000) {
5272                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5273                         }
5274                 } else {
5275                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5276                 }
5277                 close $fd;
5278
5279                 print "</table>\n";
5280         }
5281         git_footer_html();
5282 }
5283
5284 sub git_search_help {
5285         git_header_html();
5286         git_print_page_nav('','', $hash,$hash,$hash);
5287         print <<EOT;
5288 <dl>
5289 <dt><b>commit</b></dt>
5290 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5291 EOT
5292         my ($have_grep) = gitweb_check_feature('grep');
5293         if ($have_grep) {
5294                 print <<EOT;
5295 <dt><b>grep</b></dt>
5296 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5297     a different one) are searched for the given
5298 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5299 (POSIX extended) and the matches are listed. On large
5300 trees, this search can take a while and put some strain on the server, so please use it with
5301 some consideration.</dd>
5302 EOT
5303         }
5304         print <<EOT;
5305 <dt><b>author</b></dt>
5306 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5307 <dt><b>committer</b></dt>
5308 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5309 EOT
5310         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5311         if ($have_pickaxe) {
5312                 print <<EOT;
5313 <dt><b>pickaxe</b></dt>
5314 <dd>All commits that caused the string to appear or disappear from any file (changes that
5315 added, removed or "modified" the string) will be listed. This search can take a while and
5316 takes a lot of strain on the server, so please use it wisely.</dd>
5317 EOT
5318         }
5319         print "</dl>\n";
5320         git_footer_html();
5321 }
5322
5323 sub git_shortlog {
5324         my $head = git_get_head_hash($project);
5325         if (!defined $hash) {
5326                 $hash = $head;
5327         }
5328         if (!defined $page) {
5329                 $page = 0;
5330         }
5331         my $refs = git_get_references();
5332
5333         my @commitlist = parse_commits($hash, 101, (100 * $page));
5334
5335         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5336         my $next_link = '';
5337         if ($#commitlist >= 100) {
5338                 $next_link =
5339                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5340                                  -accesskey => "n", -title => "Alt-n"}, "next");
5341         }
5342
5343         git_header_html();
5344         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5345         git_print_header_div('summary', $project);
5346
5347         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5348
5349         git_footer_html();
5350 }
5351
5352 ## ......................................................................
5353 ## feeds (RSS, Atom; OPML)
5354
5355 sub git_feed {
5356         my $format = shift || 'atom';
5357         my ($have_blame) = gitweb_check_feature('blame');
5358
5359         # Atom: http://www.atomenabled.org/developers/syndication/
5360         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5361         if ($format ne 'rss' && $format ne 'atom') {
5362                 die_error(undef, "Unknown web feed format");
5363         }
5364
5365         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5366         my $head = $hash || 'HEAD';
5367         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5368
5369         my %latest_commit;
5370         my %latest_date;
5371         my $content_type = "application/$format+xml";
5372         if (defined $cgi->http('HTTP_ACCEPT') &&
5373                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5374                 # browser (feed reader) prefers text/xml
5375                 $content_type = 'text/xml';
5376         }
5377         if (defined($commitlist[0])) {
5378                 %latest_commit = %{$commitlist[0]};
5379                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5380                 print $cgi->header(
5381                         -type => $content_type,
5382                         -charset => 'utf-8',
5383                         -last_modified => $latest_date{'rfc2822'});
5384         } else {
5385                 print $cgi->header(
5386                         -type => $content_type,
5387                         -charset => 'utf-8');
5388         }
5389
5390         # Optimization: skip generating the body if client asks only
5391         # for Last-Modified date.
5392         return if ($cgi->request_method() eq 'HEAD');
5393
5394         # header variables
5395         my $title = "$site_name - $project/$action";
5396         my $feed_type = 'log';
5397         if (defined $hash) {
5398                 $title .= " - '$hash'";
5399                 $feed_type = 'branch log';
5400                 if (defined $file_name) {
5401                         $title .= " :: $file_name";
5402                         $feed_type = 'history';
5403                 }
5404         } elsif (defined $file_name) {
5405                 $title .= " - $file_name";
5406                 $feed_type = 'history';
5407         }
5408         $title .= " $feed_type";
5409         my $descr = git_get_project_description($project);
5410         if (defined $descr) {
5411                 $descr = esc_html($descr);
5412         } else {
5413                 $descr = "$project " .
5414                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5415                          " feed";
5416         }
5417         my $owner = git_get_project_owner($project);
5418         $owner = esc_html($owner);
5419
5420         #header
5421         my $alt_url;
5422         if (defined $file_name) {
5423                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5424         } elsif (defined $hash) {
5425                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5426         } else {
5427                 $alt_url = href(-full=>1, action=>"summary");
5428         }
5429         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5430         if ($format eq 'rss') {
5431                 print <<XML;
5432 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5433 <channel>
5434 XML
5435                 print "<title>$title</title>\n" .
5436                       "<link>$alt_url</link>\n" .
5437                       "<description>$descr</description>\n" .
5438                       "<language>en</language>\n";
5439         } elsif ($format eq 'atom') {
5440                 print <<XML;
5441 <feed xmlns="http://www.w3.org/2005/Atom">
5442 XML
5443                 print "<title>$title</title>\n" .
5444                       "<subtitle>$descr</subtitle>\n" .
5445                       '<link rel="alternate" type="text/html" href="' .
5446                       $alt_url . '" />' . "\n" .
5447                       '<link rel="self" type="' . $content_type . '" href="' .
5448                       $cgi->self_url() . '" />' . "\n" .
5449                       "<id>" . href(-full=>1) . "</id>\n" .
5450                       # use project owner for feed author
5451                       "<author><name>$owner</name></author>\n";
5452                 if (defined $favicon) {
5453                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5454                 }
5455                 if (defined $logo_url) {
5456                         # not twice as wide as tall: 72 x 27 pixels
5457                         print "<logo>" . esc_url($logo) . "</logo>\n";
5458                 }
5459                 if (! %latest_date) {
5460                         # dummy date to keep the feed valid until commits trickle in:
5461                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5462                 } else {
5463                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5464                 }
5465         }
5466
5467         # contents
5468         for (my $i = 0; $i <= $#commitlist; $i++) {
5469                 my %co = %{$commitlist[$i]};
5470                 my $commit = $co{'id'};
5471                 # we read 150, we always show 30 and the ones more recent than 48 hours
5472                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5473                         last;
5474                 }
5475                 my %cd = parse_date($co{'author_epoch'});
5476
5477                 # get list of changed files
5478                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5479                         $co{'parent'} || "--root",
5480                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5481                         or next;
5482                 my @difftree = map { chomp; $_ } <$fd>;
5483                 close $fd
5484                         or next;
5485
5486                 # print element (entry, item)
5487                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5488                 if ($format eq 'rss') {
5489                         print "<item>\n" .
5490                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5491                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5492                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5493                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5494                               "<link>$co_url</link>\n" .
5495                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5496                               "<content:encoded>" .
5497                               "<![CDATA[\n";
5498                 } elsif ($format eq 'atom') {
5499                         print "<entry>\n" .
5500                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5501                               "<updated>$cd{'iso-8601'}</updated>\n" .
5502                               "<author>\n" .
5503                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5504                         if ($co{'author_email'}) {
5505                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5506                         }
5507                         print "</author>\n" .
5508                               # use committer for contributor
5509                               "<contributor>\n" .
5510                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5511                         if ($co{'committer_email'}) {
5512                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5513                         }
5514                         print "</contributor>\n" .
5515                               "<published>$cd{'iso-8601'}</published>\n" .
5516                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5517                               "<id>$co_url</id>\n" .
5518                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5519                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5520                 }
5521                 my $comment = $co{'comment'};
5522                 print "<pre>\n";
5523                 foreach my $line (@$comment) {
5524                         $line = esc_html($line);
5525                         print "$line\n";
5526                 }
5527                 print "</pre><ul>\n";
5528                 foreach my $difftree_line (@difftree) {
5529                         my %difftree = parse_difftree_raw_line($difftree_line);
5530                         next if !$difftree{'from_id'};
5531
5532                         my $file = $difftree{'file'} || $difftree{'to_file'};
5533
5534                         print "<li>" .
5535                               "[" .
5536                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5537                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5538                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5539                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5540                                       -title => "diff"}, 'D');
5541                         if ($have_blame) {
5542                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5543                                                              file_name=>$file, hash_base=>$commit),
5544                                               -title => "blame"}, 'B');
5545                         }
5546                         # if this is not a feed of a file history
5547                         if (!defined $file_name || $file_name ne $file) {
5548                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5549                                                              file_name=>$file, hash=>$commit),
5550                                               -title => "history"}, 'H');
5551                         }
5552                         $file = esc_path($file);
5553                         print "] ".
5554                               "$file</li>\n";
5555                 }
5556                 if ($format eq 'rss') {
5557                         print "</ul>]]>\n" .
5558                               "</content:encoded>\n" .
5559                               "</item>\n";
5560                 } elsif ($format eq 'atom') {
5561                         print "</ul>\n</div>\n" .
5562                               "</content>\n" .
5563                               "</entry>\n";
5564                 }
5565         }
5566
5567         # end of feed
5568         if ($format eq 'rss') {
5569                 print "</channel>\n</rss>\n";
5570         }       elsif ($format eq 'atom') {
5571                 print "</feed>\n";
5572         }
5573 }
5574
5575 sub git_rss {
5576         git_feed('rss');
5577 }
5578
5579 sub git_atom {
5580         git_feed('atom');
5581 }
5582
5583 sub git_opml {
5584         my @list = git_get_projects_list();
5585
5586         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5587         print <<XML;
5588 <?xml version="1.0" encoding="utf-8"?>
5589 <opml version="1.0">
5590 <head>
5591   <title>$site_name OPML Export</title>
5592 </head>
5593 <body>
5594 <outline text="git RSS feeds">
5595 XML
5596
5597         foreach my $pr (@list) {
5598                 my %proj = %$pr;
5599                 my $head = git_get_head_hash($proj{'path'});
5600                 if (!defined $head) {
5601                         next;
5602                 }
5603                 $git_dir = "$projectroot/$proj{'path'}";
5604                 my %co = parse_commit($head);
5605                 if (!%co) {
5606                         next;
5607                 }
5608
5609                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5610                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5611                 my $html = "$my_url?p=$proj{'path'};a=summary";
5612                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5613         }
5614         print <<XML;
5615 </outline>
5616 </body>
5617 </opml>
5618 XML
5619 }