gitweb.cgi

   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 = "1.5.3.4";
  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 = "/usr/bin/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "/pub/git";
  37
  38 # target of the home link on top of all pages
  39 our $home_link = $my_uri || "/";
  40
  41 # string of the home link on top of all pages
  42 # hcoop-change: Customize.
  43 our $home_link_str = "HCoop";
  44
  45 # name of your site or organization to appear in page titles
  46 # replace this with something more descriptive for clearer bookmarks
  47 # hcoop-change: Customize.
  48 our $site_name = "HCoop Git"
  49                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  50
  51 # filename of html text to include at top of each page
  52 our $site_header = "";
  53 # html text to include at home page
  54 our $home_text = "indextext.html";
  55 # filename of html text to include at bottom of each page
  56 our $site_footer = "";
  57
  58 # URI of stylesheets
  59 our @stylesheets = ("gitweb.css");
  60 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  61 our $stylesheet = undef;
  62 # URI of GIT logo (72x27 size)
  63 our $logo = "git-logo.png";
  64 # URI of GIT favicon, assumed to be image/png type
  65 our $favicon = "git-favicon.png";
  66
  67 # URI and label (title) of GIT logo link
  68 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  69 #our $logo_label = "git documentation";
  70 our $logo_url = "http://git.or.cz/";
  71 our $logo_label = "git homepage";
  72
  73 # source of projects list
  74 our $projects_list = "";
  75
  76 # the width (in characters) of the projects list "Description" column
  77 our $projects_list_description_width = 25;
  78
  79 # default order of projects list
  80 # valid values are none, project, descr, owner, and age
  81 our $default_projects_order = "project";
  82
  83 # show repository only if this file exists
  84 # (only effective if this variable evaluates to true)
  85 our $export_ok = "";
  86
  87 # only allow viewing of repositories also shown on the overview page
  88 our $strict_export = "";
  89
  90 # list of git base URLs used for URL to where fetch project from,
  91 # i.e. full URL is "$git_base_url/$project"
  92 # hcoop-change: We like several URLs.
  93 #our @git_base_url_list = grep { $_ ne '' } ("");
  94 our @git_base_url_list = ('git://git.hcoop.net/git',
  95                           'http://git.hcoop.net/git');
  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'} || "/etc/gitweb.conf";
 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
1518                 File::Find::find({
1519                         follow_fast => 1, # follow symbolic links
1520                         follow_skip => 2, # ignore duplicates
1521                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1522                         wanted => sub {
1523                                 # skip project-list toplevel, if we get it.
1524                                 return if (m!^[/.]$!);
1525                                 # only directories can be git repositories
1526                                 return unless (-d $_);
1527
1528                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1529                                 # we check related file in $projectroot
1530                                 if ($check_forks and $subdir =~ m#/.#) {
1531                                         $File::Find::prune = 1;
1532                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1533                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1534                                         $File::Find::prune = 1;
1535                                 }
1536                         },
1537                 }, "$dir");
1538
1539         } elsif (-f $projects_list) {
1540                 # read from file(url-encoded):
1541                 # 'git%2Fgit.git Linus+Torvalds'
1542                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1543                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1544                 my %paths;
1545                 open my ($fd), $projects_list or return;
1546         PROJECT:
1547                 while (my $line = <$fd>) {
1548                         chomp $line;
1549                         my ($path, $owner) = split ' ', $line;
1550                         $path = unescape($path);
1551                         $owner = unescape($owner);
1552                         if (!defined $path) {
1553                                 next;
1554                         }
1555                         if ($filter ne '') {
1556                                 # looking for forks;
1557                                 my $pfx = substr($path, 0, length($filter));
1558                                 if ($pfx ne $filter) {
1559                                         next PROJECT;
1560                                 }
1561                                 my $sfx = substr($path, length($filter));
1562                                 if ($sfx !~ /^\/.*\.git$/) {
1563                                         next PROJECT;
1564                                 }
1565                         } elsif ($check_forks) {
1566                         PATH:
1567                                 foreach my $filter (keys %paths) {
1568                                         # looking for forks;
1569                                         my $pfx = substr($path, 0, length($filter));
1570                                         if ($pfx ne $filter) {
1571                                                 next PATH;
1572                                         }
1573                                         my $sfx = substr($path, length($filter));
1574                                         if ($sfx !~ /^\/.*\.git$/) {
1575                                                 next PATH;
1576                                         }
1577                                         # is a fork, don't include it in
1578                                         # the list
1579                                         next PROJECT;
1580                                 }
1581                         }
1582                         if (check_export_ok("$projectroot/$path")) {
1583                                 my $pr = {
1584                                         path => $path,
1585                                         owner => to_utf8($owner),
1586                                 };
1587                                 push @list, $pr;
1588                                 (my $forks_path = $path) =~ s/\.git$//;
1589                                 $paths{$forks_path}++;
1590                         }
1591                 }
1592                 close $fd;
1593         }
1594         return @list;
1595 }
1596
1597 our $gitweb_project_owner = undef;
1598 sub git_get_project_list_from_file {
1599
1600         return if (defined $gitweb_project_owner);
1601
1602         $gitweb_project_owner = {};
1603         # read from file (url-encoded):
1604         # 'git%2Fgit.git Linus+Torvalds'
1605         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1606         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1607         if (-f $projects_list) {
1608                 open (my $fd , $projects_list);
1609                 while (my $line = <$fd>) {
1610                         chomp $line;
1611                         my ($pr, $ow) = split ' ', $line;
1612                         $pr = unescape($pr);
1613                         $ow = unescape($ow);
1614                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1615                 }
1616                 close $fd;
1617         }
1618 }
1619
1620 sub git_get_project_owner {
1621         my $project = shift;
1622         my $owner;
1623
1624         return undef unless $project;
1625
1626         if (!defined $gitweb_project_owner) {
1627                 git_get_project_list_from_file();
1628         }
1629
1630         if (exists $gitweb_project_owner->{$project}) {
1631                 $owner = $gitweb_project_owner->{$project};
1632         }
1633         if (!defined $owner) {
1634                 $owner = get_file_owner("$projectroot/$project");
1635         }
1636
1637         return $owner;
1638 }
1639
1640 sub git_get_last_activity {
1641         my ($path) = @_;
1642         my $fd;
1643
1644         $git_dir = "$projectroot/$path";
1645         open($fd, "-|", git_cmd(), 'for-each-ref',
1646              '--format=%(committer)',
1647              '--sort=-committerdate',
1648              '--count=1',
1649              'refs/heads') or return;
1650         my $most_recent = <$fd>;
1651         close $fd or return;
1652         if (defined $most_recent &&
1653             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1654                 my $timestamp = $1;
1655                 my $age = time - $timestamp;
1656                 return ($age, age_string($age));
1657         }
1658         return (undef, undef);
1659 }
1660
1661 sub git_get_references {
1662         my $type = shift || "";
1663         my %refs;
1664         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1665         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1666         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1667                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1668                 or return;
1669
1670         while (my $line = <$fd>) {
1671                 chomp $line;
1672                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1673                         if (defined $refs{$1}) {
1674                                 push @{$refs{$1}}, $2;
1675                         } else {
1676                                 $refs{$1} = [ $2 ];
1677                         }
1678                 }
1679         }
1680         close $fd or return;
1681         return \%refs;
1682 }
1683
1684 sub git_get_rev_name_tags {
1685         my $hash = shift || return undef;
1686
1687         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1688                 or return;
1689         my $name_rev = <$fd>;
1690         close $fd;
1691
1692         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1693                 return $1;
1694         } else {
1695                 # catches also '$hash undefined' output
1696                 return undef;
1697         }
1698 }
1699
1700 ## ----------------------------------------------------------------------
1701 ## parse to hash functions
1702
1703 sub parse_date {
1704         my $epoch = shift;
1705         my $tz = shift || "-0000";
1706
1707         my %date;
1708         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1709         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1710         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1711         $date{'hour'} = $hour;
1712         $date{'minute'} = $min;
1713         $date{'mday'} = $mday;
1714         $date{'day'} = $days[$wday];
1715         $date{'month'} = $months[$mon];
1716         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1717                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1718         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1719                              $mday, $months[$mon], $hour ,$min;
1720         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1721                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1722
1723         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1724         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1725         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1726         $date{'hour_local'} = $hour;
1727         $date{'minute_local'} = $min;
1728         $date{'tz_local'} = $tz;
1729         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1730                                   1900+$year, $mon+1, $mday,
1731                                   $hour, $min, $sec, $tz);
1732         return %date;
1733 }
1734
1735 sub parse_tag {
1736         my $tag_id = shift;
1737         my %tag;
1738         my @comment;
1739
1740         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1741         $tag{'id'} = $tag_id;
1742         while (my $line = <$fd>) {
1743                 chomp $line;
1744                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1745                         $tag{'object'} = $1;
1746                 } elsif ($line =~ m/^type (.+)$/) {
1747                         $tag{'type'} = $1;
1748                 } elsif ($line =~ m/^tag (.+)$/) {
1749                         $tag{'name'} = $1;
1750                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1751                         $tag{'author'} = $1;
1752                         $tag{'epoch'} = $2;
1753                         $tag{'tz'} = $3;
1754                 } elsif ($line =~ m/--BEGIN/) {
1755                         push @comment, $line;
1756                         last;
1757                 } elsif ($line eq "") {
1758                         last;
1759                 }
1760         }
1761         push @comment, <$fd>;
1762         $tag{'comment'} = \@comment;
1763         close $fd or return;
1764         if (!defined $tag{'name'}) {
1765                 return
1766         };
1767         return %tag
1768 }
1769
1770 sub parse_commit_text {
1771         my ($commit_text, $withparents) = @_;
1772         my @commit_lines = split '\n', $commit_text;
1773         my %co;
1774
1775         pop @commit_lines; # Remove '\0'
1776
1777         if (! @commit_lines) {
1778                 return;
1779         }
1780
1781         my $header = shift @commit_lines;
1782         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1783                 return;
1784         }
1785         ($co{'id'}, my @parents) = split ' ', $header;
1786         while (my $line = shift @commit_lines) {
1787                 last if $line eq "\n";
1788                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1789                         $co{'tree'} = $1;
1790                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1791                         push @parents, $1;
1792                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1793                         $co{'author'} = $1;
1794                         $co{'author_epoch'} = $2;
1795                         $co{'author_tz'} = $3;
1796                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1797                                 $co{'author_name'}  = $1;
1798                                 $co{'author_email'} = $2;
1799                         } else {
1800                                 $co{'author_name'} = $co{'author'};
1801                         }
1802                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1803                         $co{'committer'} = $1;
1804                         $co{'committer_epoch'} = $2;
1805                         $co{'committer_tz'} = $3;
1806                         $co{'committer_name'} = $co{'committer'};
1807                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1808                                 $co{'committer_name'}  = $1;
1809                                 $co{'committer_email'} = $2;
1810                         } else {
1811                                 $co{'committer_name'} = $co{'committer'};
1812                         }
1813                 }
1814         }
1815         if (!defined $co{'tree'}) {
1816                 return;
1817         };
1818         $co{'parents'} = \@parents;
1819         $co{'parent'} = $parents[0];
1820
1821         foreach my $title (@commit_lines) {
1822                 $title =~ s/^    //;
1823                 if ($title ne "") {
1824                         $co{'title'} = chop_str($title, 80, 5);
1825                         # remove leading stuff of merges to make the interesting part visible
1826                         if (length($title) > 50) {
1827                                 $title =~ s/^Automatic //;
1828                                 $title =~ s/^merge (of|with) /Merge ... /i;
1829                                 if (length($title) > 50) {
1830                                         $title =~ s/(http|rsync):\/\///;
1831                                 }
1832                                 if (length($title) > 50) {
1833                                         $title =~ s/(master|www|rsync)\.//;
1834                                 }
1835                                 if (length($title) > 50) {
1836                                         $title =~ s/kernel.org:?//;
1837                                 }
1838                                 if (length($title) > 50) {
1839                                         $title =~ s/\/pub\/scm//;
1840                                 }
1841                         }
1842                         $co{'title_short'} = chop_str($title, 50, 5);
1843                         last;
1844                 }
1845         }
1846         if ($co{'title'} eq "") {
1847                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1848         }
1849         # remove added spaces
1850         foreach my $line (@commit_lines) {
1851                 $line =~ s/^    //;
1852         }
1853         $co{'comment'} = \@commit_lines;
1854
1855         my $age = time - $co{'committer_epoch'};
1856         $co{'age'} = $age;
1857         $co{'age_string'} = age_string($age);
1858         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1859         if ($age > 60*60*24*7*2) {
1860                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1861                 $co{'age_string_age'} = $co{'age_string'};
1862         } else {
1863                 $co{'age_string_date'} = $co{'age_string'};
1864                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1865         }
1866         return %co;
1867 }
1868
1869 sub parse_commit {
1870         my ($commit_id) = @_;
1871         my %co;
1872
1873         local $/ = "\0";
1874
1875         open my $fd, "-|", git_cmd(), "rev-list",
1876                 "--parents",
1877                 "--header",
1878                 "--max-count=1",
1879                 $commit_id,
1880                 "--",
1881                 or die_error(undef, "Open git-rev-list failed");
1882         %co = parse_commit_text(<$fd>, 1);
1883         close $fd;
1884
1885         return %co;
1886 }
1887
1888 sub parse_commits {
1889         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1890         my @cos;
1891
1892         $maxcount ||= 1;
1893         $skip ||= 0;
1894
1895         local $/ = "\0";
1896
1897         open my $fd, "-|", git_cmd(), "rev-list",
1898                 "--header",
1899                 ($arg ? ($arg) : ()),
1900                 ("--max-count=" . $maxcount),
1901                 ("--skip=" . $skip),
1902                 @extra_options,
1903                 $commit_id,
1904                 "--",
1905                 ($filename ? ($filename) : ())
1906                 or die_error(undef, "Open git-rev-list failed");
1907         while (my $line = <$fd>) {
1908                 my %co = parse_commit_text($line);
1909                 push @cos, \%co;
1910         }
1911         close $fd;
1912
1913         return wantarray ? @cos : \@cos;
1914 }
1915
1916 # parse ref from ref_file, given by ref_id, with given type
1917 sub parse_ref {
1918         my $ref_file = shift;
1919         my $ref_id = shift;
1920         my $type = shift || git_get_type($ref_id);
1921         my %ref_item;
1922
1923         $ref_item{'type'} = $type;
1924         $ref_item{'id'} = $ref_id;
1925         $ref_item{'epoch'} = 0;
1926         $ref_item{'age'} = "unknown";
1927         if ($type eq "tag") {
1928                 my %tag = parse_tag($ref_id);
1929                 $ref_item{'comment'} = $tag{'comment'};
1930                 if ($tag{'type'} eq "commit") {
1931                         my %co = parse_commit($tag{'object'});
1932                         $ref_item{'epoch'} = $co{'committer_epoch'};
1933                         $ref_item{'age'} = $co{'age_string'};
1934                 } elsif (defined($tag{'epoch'})) {
1935                         my $age = time - $tag{'epoch'};
1936                         $ref_item{'epoch'} = $tag{'epoch'};
1937                         $ref_item{'age'} = age_string($age);
1938                 }
1939                 $ref_item{'reftype'} = $tag{'type'};
1940                 $ref_item{'name'} = $tag{'name'};
1941                 $ref_item{'refid'} = $tag{'object'};
1942         } elsif ($type eq "commit"){
1943                 my %co = parse_commit($ref_id);
1944                 $ref_item{'reftype'} = "commit";
1945                 $ref_item{'name'} = $ref_file;
1946                 $ref_item{'title'} = $co{'title'};
1947                 $ref_item{'refid'} = $ref_id;
1948                 $ref_item{'epoch'} = $co{'committer_epoch'};
1949                 $ref_item{'age'} = $co{'age_string'};
1950         } else {
1951                 $ref_item{'reftype'} = $type;
1952                 $ref_item{'name'} = $ref_file;
1953                 $ref_item{'refid'} = $ref_id;
1954         }
1955
1956         return %ref_item;
1957 }
1958
1959 # parse line of git-diff-tree "raw" output
1960 sub parse_difftree_raw_line {
1961         my $line = shift;
1962         my %res;
1963
1964         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1965         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1966         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1967                 $res{'from_mode'} = $1;
1968                 $res{'to_mode'} = $2;
1969                 $res{'from_id'} = $3;
1970                 $res{'to_id'} = $4;
1971                 $res{'status'} = $5;
1972                 $res{'similarity'} = $6;
1973                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1974                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1975                 } else {
1976                         $res{'file'} = unquote($7);
1977                 }
1978         }
1979         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1980         # combined diff (for merge commit)
1981         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1982                 $res{'nparents'}  = length($1);
1983                 $res{'from_mode'} = [ split(' ', $2) ];
1984                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1985                 $res{'from_id'} = [ split(' ', $3) ];
1986                 $res{'to_id'} = pop @{$res{'from_id'}};
1987                 $res{'status'} = [ split('', $4) ];
1988                 $res{'to_file'} = unquote($5);
1989         }
1990         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1991         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1992                 $res{'commit'} = $1;
1993         }
1994
1995         return wantarray ? %res : \%res;
1996 }
1997
1998 # parse line of git-ls-tree output
1999 sub parse_ls_tree_line ($;%) {
2000         my $line = shift;
2001         my %opts = @_;
2002         my %res;
2003
2004         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2005         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2006
2007         $res{'mode'} = $1;
2008         $res{'type'} = $2;
2009         $res{'hash'} = $3;
2010         if ($opts{'-z'}) {
2011                 $res{'name'} = $4;
2012         } else {
2013                 $res{'name'} = unquote($4);
2014         }
2015
2016         return wantarray ? %res : \%res;
2017 }
2018
2019 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2020 sub parse_from_to_diffinfo {
2021         my ($diffinfo, $from, $to, @parents) = @_;
2022
2023         if ($diffinfo->{'nparents'}) {
2024                 # combined diff
2025                 $from->{'file'} = [];
2026                 $from->{'href'} = [];
2027                 fill_from_file_info($diffinfo, @parents)
2028                         unless exists $diffinfo->{'from_file'};
2029                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2030                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2031                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2032                                 $from->{'href'}[$i] = href(action=>"blob",
2033                                                            hash_base=>$parents[$i],
2034                                                            hash=>$diffinfo->{'from_id'}[$i],
2035                                                            file_name=>$from->{'file'}[$i]);
2036                         } else {
2037                                 $from->{'href'}[$i] = undef;
2038                         }
2039                 }
2040         } else {
2041                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2042                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2043                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2044                                                hash=>$diffinfo->{'from_id'},
2045                                                file_name=>$from->{'file'});
2046                 } else {
2047                         delete $from->{'href'};
2048                 }
2049         }
2050
2051         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2052         if (!is_deleted($diffinfo)) { # file exists in result
2053                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2054                                      hash=>$diffinfo->{'to_id'},
2055                                      file_name=>$to->{'file'});
2056         } else {
2057                 delete $to->{'href'};
2058         }
2059 }
2060
2061 ## ......................................................................
2062 ## parse to array of hashes functions
2063
2064 sub git_get_heads_list {
2065         my $limit = shift;
2066         my @headslist;
2067
2068         open my $fd, '-|', git_cmd(), 'for-each-ref',
2069                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2070                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2071                 'refs/heads'
2072                 or return;
2073         while (my $line = <$fd>) {
2074                 my %ref_item;
2075
2076                 chomp $line;
2077                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2078                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2079                 my ($committer, $epoch, $tz) =
2080                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2081                 $name =~ s!^refs/heads/!!;
2082
2083                 $ref_item{'name'}  = $name;
2084                 $ref_item{'id'}    = $hash;
2085                 $ref_item{'title'} = $title || '(no commit message)';
2086                 $ref_item{'epoch'} = $epoch;
2087                 if ($epoch) {
2088                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2089                 } else {
2090                         $ref_item{'age'} = "unknown";
2091                 }
2092
2093                 push @headslist, \%ref_item;
2094         }
2095         close $fd;
2096
2097         return wantarray ? @headslist : \@headslist;
2098 }
2099
2100 sub git_get_tags_list {
2101         my $limit = shift;
2102         my @tagslist;
2103
2104         open my $fd, '-|', git_cmd(), 'for-each-ref',
2105                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2106                 '--format=%(objectname) %(objecttype) %(refname) '.
2107                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2108                 'refs/tags'
2109                 or return;
2110         while (my $line = <$fd>) {
2111                 my %ref_item;
2112
2113                 chomp $line;
2114                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2115                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2116                 my ($creator, $epoch, $tz) =
2117                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2118                 $name =~ s!^refs/tags/!!;
2119
2120                 $ref_item{'type'} = $type;
2121                 $ref_item{'id'} = $id;
2122                 $ref_item{'name'} = $name;
2123                 if ($type eq "tag") {
2124                         $ref_item{'subject'} = $title;
2125                         $ref_item{'reftype'} = $reftype;
2126                         $ref_item{'refid'}   = $refid;
2127                 } else {
2128                         $ref_item{'reftype'} = $type;
2129                         $ref_item{'refid'}   = $id;
2130                 }
2131
2132                 if ($type eq "tag" || $type eq "commit") {
2133                         $ref_item{'epoch'} = $epoch;
2134                         if ($epoch) {
2135                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2136                         } else {
2137                                 $ref_item{'age'} = "unknown";
2138                         }
2139                 }
2140
2141                 push @tagslist, \%ref_item;
2142         }
2143         close $fd;
2144
2145         return wantarray ? @tagslist : \@tagslist;
2146 }
2147
2148 ## ----------------------------------------------------------------------
2149 ## filesystem-related functions
2150
2151 sub get_file_owner {
2152         my $path = shift;
2153
2154         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2155         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2156         if (!defined $gcos) {
2157                 return undef;
2158         }
2159         my $owner = $gcos;
2160         $owner =~ s/[,;].*$//;
2161         return to_utf8($owner);
2162 }
2163
2164 ## ......................................................................
2165 ## mimetype related functions
2166
2167 sub mimetype_guess_file {
2168         my $filename = shift;
2169         my $mimemap = shift;
2170         -r $mimemap or return undef;
2171
2172         my %mimemap;
2173         open(MIME, $mimemap) or return undef;
2174         while (<MIME>) {
2175                 next if m/^#/; # skip comments
2176                 my ($mime, $exts) = split(/\t+/);
2177                 if (defined $exts) {
2178                         my @exts = split(/\s+/, $exts);
2179                         foreach my $ext (@exts) {
2180                                 $mimemap{$ext} = $mime;
2181                         }
2182                 }
2183         }
2184         close(MIME);
2185
2186         $filename =~ /\.([^.]*)$/;
2187         return $mimemap{$1};
2188 }
2189
2190 sub mimetype_guess {
2191         my $filename = shift;
2192         my $mime;
2193         $filename =~ /\./ or return undef;
2194
2195         if ($mimetypes_file) {
2196                 my $file = $mimetypes_file;
2197                 if ($file !~ m!^/!) { # if it is relative path
2198                         # it is relative to project
2199                         $file = "$projectroot/$project/$file";
2200                 }
2201                 $mime = mimetype_guess_file($filename, $file);
2202         }
2203         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2204         return $mime;
2205 }
2206
2207 sub blob_mimetype {
2208         my $fd = shift;
2209         my $filename = shift;
2210
2211         if ($filename) {
2212                 my $mime = mimetype_guess($filename);
2213                 $mime and return $mime;
2214         }
2215
2216         # just in case
2217         return $default_blob_plain_mimetype unless $fd;
2218
2219         if (-T $fd) {
2220                 return 'text/plain' .
2221                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2222         } elsif (! $filename) {
2223                 return 'application/octet-stream';
2224         } elsif ($filename =~ m/\.png$/i) {
2225                 return 'image/png';
2226         } elsif ($filename =~ m/\.gif$/i) {
2227                 return 'image/gif';
2228         } elsif ($filename =~ m/\.jpe?g$/i) {
2229                 return 'image/jpeg';
2230         } else {
2231                 return 'application/octet-stream';
2232         }
2233 }
2234
2235 ## ======================================================================
2236 ## functions printing HTML: header, footer, error page
2237
2238 sub git_header_html {
2239         my $status = shift || "200 OK";
2240         my $expires = shift;
2241
2242         my $title = "$site_name";
2243         if (defined $project) {
2244                 $title .= " - " . to_utf8($project);
2245                 if (defined $action) {
2246                         $title .= "/$action";
2247                         if (defined $file_name) {
2248                                 $title .= " - " . esc_path($file_name);
2249                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2250                                         $title .= "/";
2251                                 }
2252                         }
2253                 }
2254         }
2255         my $content_type;
2256         # require explicit support from the UA if we are to send the page as
2257         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2258         # we have to do this because MSIE sometimes globs '*/*', pretending to
2259         # support xhtml+xml but choking when it gets what it asked for.
2260         if (defined $cgi->http('HTTP_ACCEPT') &&
2261             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2262             $cgi->Accept('application/xhtml+xml') != 0) {
2263                 $content_type = 'application/xhtml+xml';
2264         } else {
2265                 $content_type = 'text/html';
2266         }
2267         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2268                            -status=> $status, -expires => $expires);
2269         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2270         print <<EOF;
2271 <?xml version="1.0" encoding="utf-8"?>
2272 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2273 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2274 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2275 <!-- git core binaries version $git_version -->
2276 <head>
2277 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2278 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2279 <meta name="robots" content="index, nofollow"/>
2280 <title>$title</title>
2281 EOF
2282 # print out each stylesheet that exist
2283         if (defined $stylesheet) {
2284 #provides backwards capability for those people who define style sheet in a config file
2285                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2286         } else {
2287                 foreach my $stylesheet (@stylesheets) {
2288                         next unless $stylesheet;
2289                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2290                 }
2291         }
2292         if (defined $project) {
2293                 printf('<link rel="alternate" title="%s log RSS feed" '.
2294                        'href="%s" type="application/rss+xml" />'."\n",
2295                        esc_param($project), href(action=>"rss"));
2296                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2297                        'href="%s" type="application/rss+xml" />'."\n",
2298                        esc_param($project), href(action=>"rss",
2299                                                  extra_options=>"--no-merges"));
2300                 printf('<link rel="alternate" title="%s log Atom feed" '.
2301                        'href="%s" type="application/atom+xml" />'."\n",
2302                        esc_param($project), href(action=>"atom"));
2303                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2304                        'href="%s" type="application/atom+xml" />'."\n",
2305                        esc_param($project), href(action=>"atom",
2306                                                  extra_options=>"--no-merges"));
2307         } else {
2308                 printf('<link rel="alternate" title="%s projects list" '.
2309                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2310                        $site_name, href(project=>undef, action=>"project_index"));
2311                 printf('<link rel="alternate" title="%s projects feeds" '.
2312                        'href="%s" type="text/x-opml"/>'."\n",
2313                        $site_name, href(project=>undef, action=>"opml"));
2314         }
2315         if (defined $favicon) {
2316                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2317         }
2318
2319         print "</head>\n" .
2320               "<body>\n";
2321
2322         if (-f $site_header) {
2323                 open (my $fd, $site_header);
2324                 print <$fd>;
2325                 close $fd;
2326         }
2327
2328         print "<div class=\"page_header\">\n" .
2329               $cgi->a({-href => esc_url($logo_url),
2330                        -title => $logo_label},
2331                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2332         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2333         if (defined $project) {
2334                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2335                 if (defined $action) {
2336                         print " / $action";
2337                 }
2338                 print "\n";
2339         }
2340         print "</div>\n";
2341
2342         my ($have_search) = gitweb_check_feature('search');
2343         if ((defined $project) && ($have_search)) {
2344                 if (!defined $searchtext) {
2345                         $searchtext = "";
2346                 }
2347                 my $search_hash;
2348                 if (defined $hash_base) {
2349                         $search_hash = $hash_base;
2350                 } elsif (defined $hash) {
2351                         $search_hash = $hash;
2352                 } else {
2353                         $search_hash = "HEAD";
2354                 }
2355                 my $action = $my_uri;
2356                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2357                 if ($use_pathinfo) {
2358                         $action .= "/$project";
2359                 } else {
2360                         $cgi->param("p", $project);
2361                 }
2362                 $cgi->param("a", "search");
2363                 $cgi->param("h", $search_hash);
2364                 print $cgi->startform(-method => "get", -action => $action) .
2365                       "<div class=\"search\">\n" .
2366                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2367                       $cgi->hidden(-name => "a") . "\n" .
2368                       $cgi->hidden(-name => "h") . "\n" .
2369                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2370                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2371                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2372                       " search:\n",
2373                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2374                       "</div>" .
2375                       $cgi->end_form() . "\n";
2376         }
2377 }
2378
2379 sub git_footer_html {
2380         print "<div class=\"page_footer\">\n";
2381         if (defined $project) {
2382                 my $descr = git_get_project_description($project);
2383                 if (defined $descr) {
2384                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2385                 }
2386                 print $cgi->a({-href => href(action=>"rss"),
2387                               -class => "rss_logo"}, "RSS") . " ";
2388                 print $cgi->a({-href => href(action=>"atom"),
2389                               -class => "rss_logo"}, "Atom") . "\n";
2390         } else {
2391                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2392                               -class => "rss_logo"}, "OPML") . " ";
2393                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2394                               -class => "rss_logo"}, "TXT") . "\n";
2395         }
2396         print "</div>\n" ;
2397
2398         if (-f $site_footer) {
2399                 open (my $fd, $site_footer);
2400                 print <$fd>;
2401                 close $fd;
2402         }
2403
2404         print "</body>\n" .
2405               "</html>";
2406 }
2407
2408 sub die_error {
2409         my $status = shift || "403 Forbidden";
2410         my $error = shift || "Malformed query, file missing or permission denied";
2411
2412         git_header_html($status);
2413         print <<EOF;
2414 <div class="page_body">
2415 <br /><br />
2416 $status - $error
2417 <br />
2418 </div>
2419 EOF
2420         git_footer_html();
2421         exit;
2422 }
2423
2424 ## ----------------------------------------------------------------------
2425 ## functions printing or outputting HTML: navigation
2426
2427 sub git_print_page_nav {
2428         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2429         $extra = '' if !defined $extra; # pager or formats
2430
2431         my @navs = qw(summary shortlog log commit commitdiff tree);
2432         if ($suppress) {
2433                 @navs = grep { $_ ne $suppress } @navs;
2434         }
2435
2436         my %arg = map { $_ => {action=>$_} } @navs;
2437         if (defined $head) {
2438                 for (qw(commit commitdiff)) {
2439                         $arg{$_}{'hash'} = $head;
2440                 }
2441                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2442                         for (qw(shortlog log)) {
2443                                 $arg{$_}{'hash'} = $head;
2444                         }
2445                 }
2446         }
2447         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2448         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2449
2450         print "<div class=\"page_nav\">\n" .
2451                 (join " | ",
2452                  map { $_ eq $current ?
2453                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2454                  } @navs);
2455         print "<br/>\n$extra<br/>\n" .
2456               "</div>\n";
2457 }
2458
2459 sub format_paging_nav {
2460         my ($action, $hash, $head, $page, $nrevs) = @_;
2461         my $paging_nav;
2462
2463
2464         if ($hash ne $head || $page) {
2465                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2466         } else {
2467                 $paging_nav .= "HEAD";
2468         }
2469
2470         if ($page > 0) {
2471                 $paging_nav .= " &sdot; " .
2472                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2473                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2474         } else {
2475                 $paging_nav .= " &sdot; prev";
2476         }
2477
2478         if ($nrevs >= (100 * ($page+1)-1)) {
2479                 $paging_nav .= " &sdot; " .
2480                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2481                                  -accesskey => "n", -title => "Alt-n"}, "next");
2482         } else {
2483                 $paging_nav .= " &sdot; next";
2484         }
2485
2486         return $paging_nav;
2487 }
2488
2489 ## ......................................................................
2490 ## functions printing or outputting HTML: div
2491
2492 sub git_print_header_div {
2493         my ($action, $title, $hash, $hash_base) = @_;
2494         my %args = ();
2495
2496         $args{'action'} = $action;
2497         $args{'hash'} = $hash if $hash;
2498         $args{'hash_base'} = $hash_base if $hash_base;
2499
2500         print "<div class=\"header\">\n" .
2501               $cgi->a({-href => href(%args), -class => "title"},
2502               $title ? $title : $action) .
2503               "\n</div>\n";
2504 }
2505
2506 #sub git_print_authorship (\%) {
2507 sub git_print_authorship {
2508         my $co = shift;
2509
2510         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2511         print "<div class=\"author_date\">" .
2512               esc_html($co->{'author_name'}) .
2513               " [$ad{'rfc2822'}";
2514         if ($ad{'hour_local'} < 6) {
2515                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2516                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2517         } else {
2518                 printf(" (%02d:%02d %s)",
2519                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2520         }
2521         print "]</div>\n";
2522 }
2523
2524 sub git_print_page_path {
2525         my $name = shift;
2526         my $type = shift;
2527         my $hb = shift;
2528
2529
2530         print "<div class=\"page_path\">";
2531         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2532                       -title => 'tree root'}, to_utf8("[$project]"));
2533         print " / ";
2534         if (defined $name) {
2535                 my @dirname = split '/', $name;
2536                 my $basename = pop @dirname;
2537                 my $fullname = '';
2538
2539                 foreach my $dir (@dirname) {
2540                         $fullname .= ($fullname ? '/' : '') . $dir;
2541                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2542                                                      hash_base=>$hb),
2543                                       -title => $fullname}, esc_path($dir));
2544                         print " / ";
2545                 }
2546                 if (defined $type && $type eq 'blob') {
2547                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2548                                                      hash_base=>$hb),
2549                                       -title => $name}, esc_path($basename));
2550                 } elsif (defined $type && $type eq 'tree') {
2551                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2552                                                      hash_base=>$hb),
2553                                       -title => $name}, esc_path($basename));
2554                         print " / ";
2555                 } else {
2556                         print esc_path($basename);
2557                 }
2558         }
2559         print "<br/></div>\n";
2560 }
2561
2562 # sub git_print_log (\@;%) {
2563 sub git_print_log ($;%) {
2564         my $log = shift;
2565         my %opts = @_;
2566
2567         if ($opts{'-remove_title'}) {
2568                 # remove title, i.e. first line of log
2569                 shift @$log;
2570         }
2571         # remove leading empty lines
2572         while (defined $log->[0] && $log->[0] eq "") {
2573                 shift @$log;
2574         }
2575
2576         # print log
2577         my $signoff = 0;
2578         my $empty = 0;
2579         foreach my $line (@$log) {
2580                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2581                         $signoff = 1;
2582                         $empty = 0;
2583                         if (! $opts{'-remove_signoff'}) {
2584                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2585                                 next;
2586                         } else {
2587                                 # remove signoff lines
2588                                 next;
2589                         }
2590                 } else {
2591                         $signoff = 0;
2592                 }
2593
2594                 # print only one empty line
2595                 # do not print empty line after signoff
2596                 if ($line eq "") {
2597                         next if ($empty || $signoff);
2598                         $empty = 1;
2599                 } else {
2600                         $empty = 0;
2601                 }
2602
2603                 print format_log_line_html($line) . "<br/>\n";
2604         }
2605
2606         if ($opts{'-final_empty_line'}) {
2607                 # end with single empty line
2608                 print "<br/>\n" unless $empty;
2609         }
2610 }
2611
2612 # return link target (what link points to)
2613 sub git_get_link_target {
2614         my $hash = shift;
2615         my $link_target;
2616
2617         # read link
2618         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2619                 or return;
2620         {
2621                 local $/;
2622                 $link_target = <$fd>;
2623         }
2624         close $fd
2625                 or return;
2626
2627         return $link_target;
2628 }
2629
2630 # given link target, and the directory (basedir) the link is in,
2631 # return target of link relative to top directory (top tree);
2632 # return undef if it is not possible (including absolute links).
2633 sub normalize_link_target {
2634         my ($link_target, $basedir, $hash_base) = @_;
2635
2636         # we can normalize symlink target only if $hash_base is provided
2637         return unless $hash_base;
2638
2639         # absolute symlinks (beginning with '/') cannot be normalized
2640         return if (substr($link_target, 0, 1) eq '/');
2641
2642         # normalize link target to path from top (root) tree (dir)
2643         my $path;
2644         if ($basedir) {
2645                 $path = $basedir . '/' . $link_target;
2646         } else {
2647                 # we are in top (root) tree (dir)
2648                 $path = $link_target;
2649         }
2650
2651         # remove //, /./, and /../
2652         my @path_parts;
2653         foreach my $part (split('/', $path)) {
2654                 # discard '.' and ''
2655                 next if (!$part || $part eq '.');
2656                 # handle '..'
2657                 if ($part eq '..') {
2658                         if (@path_parts) {
2659                                 pop @path_parts;
2660                         } else {
2661                                 # link leads outside repository (outside top dir)
2662                                 return;
2663                         }
2664                 } else {
2665                         push @path_parts, $part;
2666                 }
2667         }
2668         $path = join('/', @path_parts);
2669
2670         return $path;
2671 }
2672
2673 # print tree entry (row of git_tree), but without encompassing <tr> element
2674 sub git_print_tree_entry {
2675         my ($t, $basedir, $hash_base, $have_blame) = @_;
2676
2677         my %base_key = ();
2678         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2679
2680         # The format of a table row is: mode list link.  Where mode is
2681         # the mode of the entry, list is the name of the entry, an href,
2682         # and link is the action links of the entry.
2683
2684         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2685         if ($t->{'type'} eq "blob") {
2686                 print "<td class=\"list\">" .
2687                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2688                                                file_name=>"$basedir$t->{'name'}", %base_key),
2689                                 -class => "list"}, esc_path($t->{'name'}));
2690                 if (S_ISLNK(oct $t->{'mode'})) {
2691                         my $link_target = git_get_link_target($t->{'hash'});
2692                         if ($link_target) {
2693                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2694                                 if (defined $norm_target) {
2695                                         print " -> " .
2696                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2697                                                                      file_name=>$norm_target),
2698                                                        -title => $norm_target}, esc_path($link_target));
2699                                 } else {
2700                                         print " -> " . esc_path($link_target);
2701                                 }
2702                         }
2703                 }
2704                 print "</td>\n";
2705                 print "<td class=\"link\">";
2706                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2707                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2708                               "blob");
2709                 if ($have_blame) {
2710                         print " | " .
2711                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2712                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2713                                       "blame");
2714                 }
2715                 if (defined $hash_base) {
2716                         print " | " .
2717                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2718                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2719                                       "history");
2720                 }
2721                 print " | " .
2722                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2723                                                file_name=>"$basedir$t->{'name'}")},
2724                                 "raw");
2725                 print "</td>\n";
2726
2727         } elsif ($t->{'type'} eq "tree") {
2728                 print "<td class=\"list\">";
2729                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2730                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2731                               esc_path($t->{'name'}));
2732                 print "</td>\n";
2733                 print "<td class=\"link\">";
2734                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2735                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2736                               "tree");
2737                 if (defined $hash_base) {
2738                         print " | " .
2739                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2740                                                      file_name=>"$basedir$t->{'name'}")},
2741                                       "history");
2742                 }
2743                 print "</td>\n";
2744         } else {
2745                 # unknown object: we can only present history for it
2746                 # (this includes 'commit' object, i.e. submodule support)
2747                 print "<td class=\"list\">" .
2748                       esc_path($t->{'name'}) .
2749                       "</td>\n";
2750                 print "<td class=\"link\">";
2751                 if (defined $hash_base) {
2752                         print $cgi->a({-href => href(action=>"history",
2753                                                      hash_base=>$hash_base,
2754                                                      file_name=>"$basedir$t->{'name'}")},
2755                                       "history");
2756                 }
2757                 print "</td>\n";
2758         }
2759 }
2760
2761 ## ......................................................................
2762 ## functions printing large fragments of HTML
2763
2764 sub fill_from_file_info {
2765         my ($diff, @parents) = @_;
2766
2767         $diff->{'from_file'} = [ ];
2768         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2769         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2770                 if ($diff->{'status'}[$i] eq 'R' ||
2771                     $diff->{'status'}[$i] eq 'C') {
2772                         $diff->{'from_file'}[$i] =
2773                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2774                 }
2775         }
2776
2777         return $diff;
2778 }
2779
2780 # parameters can be strings, or references to arrays of strings
2781 sub from_ids_eq {
2782         my ($a, $b) = @_;
2783
2784         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2785                 for (my $i = 0; $i < @$a; ++$i) {
2786                         return 0 unless ($a->[$i] eq $b->[$i]);
2787                 }
2788                 return 1;
2789         } elsif (!ref($a) && !ref($b)) {
2790                 return $a eq $b;
2791         } else {
2792                 return 0;
2793         }
2794 }
2795
2796 sub is_deleted {
2797         my $diffinfo = shift;
2798
2799         return $diffinfo->{'to_id'} eq ('0' x 40);
2800 }
2801
2802 sub git_difftree_body {
2803         my ($difftree, $hash, @parents) = @_;
2804         my ($parent) = $parents[0];
2805         my ($have_blame) = gitweb_check_feature('blame');
2806         print "<div class=\"list_head\">\n";
2807         if ($#{$difftree} > 10) {
2808                 print(($#{$difftree} + 1) . " files changed:\n");
2809         }
2810         print "</div>\n";
2811
2812         print "<table class=\"" .
2813               (@parents > 1 ? "combined " : "") .
2814               "diff_tree\">\n";
2815
2816         # header only for combined diff in 'commitdiff' view
2817         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2818         if ($has_header) {
2819                 # table header
2820                 print "<thead><tr>\n" .
2821                        "<th></th><th></th>\n"; # filename, patchN link
2822                 for (my $i = 0; $i < @parents; $i++) {
2823                         my $par = $parents[$i];
2824                         print "<th>" .
2825                               $cgi->a({-href => href(action=>"commitdiff",
2826                                                      hash=>$hash, hash_parent=>$par),
2827                                        -title => 'commitdiff to parent number ' .
2828                                                   ($i+1) . ': ' . substr($par,0,7)},
2829                                       $i+1) .
2830                               "&nbsp;</th>\n";
2831                 }
2832                 print "</tr></thead>\n<tbody>\n";
2833         }
2834
2835         my $alternate = 1;
2836         my $patchno = 0;
2837         foreach my $line (@{$difftree}) {
2838                 my $diff;
2839                 if (ref($line) eq "HASH") {
2840                         # pre-parsed (or generated by hand)
2841                         $diff = $line;
2842                 } else {
2843                         $diff = parse_difftree_raw_line($line);
2844                 }
2845
2846                 if ($alternate) {
2847                         print "<tr class=\"dark\">\n";
2848                 } else {
2849                         print "<tr class=\"light\">\n";
2850                 }
2851                 $alternate ^= 1;
2852
2853                 if (exists $diff->{'nparents'}) { # combined diff
2854
2855                         fill_from_file_info($diff, @parents)
2856                                 unless exists $diff->{'from_file'};
2857
2858                         if (!is_deleted($diff)) {
2859                                 # file exists in the result (child) commit
2860                                 print "<td>" .
2861                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2862                                                              file_name=>$diff->{'to_file'},
2863                                                              hash_base=>$hash),
2864                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2865                                       "</td>\n";
2866                         } else {
2867                                 print "<td>" .
2868                                       esc_path($diff->{'to_file'}) .
2869                                       "</td>\n";
2870                         }
2871
2872                         if ($action eq 'commitdiff') {
2873                                 # link to patch
2874                                 $patchno++;
2875                                 print "<td class=\"link\">" .
2876                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2877                                       " | " .
2878                                       "</td>\n";
2879                         }
2880
2881                         my $has_history = 0;
2882                         my $not_deleted = 0;
2883                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2884                                 my $hash_parent = $parents[$i];
2885                                 my $from_hash = $diff->{'from_id'}[$i];
2886                                 my $from_path = $diff->{'from_file'}[$i];
2887                                 my $status = $diff->{'status'}[$i];
2888
2889                                 $has_history ||= ($status ne 'A');
2890                                 $not_deleted ||= ($status ne 'D');
2891
2892                                 if ($status eq 'A') {
2893                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2894                                 } elsif ($status eq 'D') {
2895                                         print "<td class=\"link\">" .
2896                                               $cgi->a({-href => href(action=>"blob",
2897                                                                      hash_base=>$hash,
2898                                                                      hash=>$from_hash,
2899                                                                      file_name=>$from_path)},
2900                                                       "blob" . ($i+1)) .
2901                                               " | </td>\n";
2902                                 } else {
2903                                         if ($diff->{'to_id'} eq $from_hash) {
2904                                                 print "<td class=\"link nochange\">";
2905                                         } else {
2906                                                 print "<td class=\"link\">";
2907                                         }
2908                                         print $cgi->a({-href => href(action=>"blobdiff",
2909                                                                      hash=>$diff->{'to_id'},
2910                                                                      hash_parent=>$from_hash,
2911                                                                      hash_base=>$hash,
2912                                                                      hash_parent_base=>$hash_parent,
2913                                                                      file_name=>$diff->{'to_file'},
2914                                                                      file_parent=>$from_path)},
2915                                                       "diff" . ($i+1)) .
2916                                               " | </td>\n";
2917                                 }
2918                         }
2919
2920                         print "<td class=\"link\">";
2921                         if ($not_deleted) {
2922                                 print $cgi->a({-href => href(action=>"blob",
2923                                                              hash=>$diff->{'to_id'},
2924                                                              file_name=>$diff->{'to_file'},
2925                                                              hash_base=>$hash)},
2926                                               "blob");
2927                                 print " | " if ($has_history);
2928                         }
2929                         if ($has_history) {
2930                                 print $cgi->a({-href => href(action=>"history",
2931                                                              file_name=>$diff->{'to_file'},
2932                                                              hash_base=>$hash)},
2933                                               "history");
2934                         }
2935                         print "</td>\n";
2936
2937                         print "</tr>\n";
2938                         next; # instead of 'else' clause, to avoid extra indent
2939                 }
2940                 # else ordinary diff
2941
2942                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2943                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2944                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2945                         $to_mode_oct = oct $diff->{'to_mode'};
2946                         if (S_ISREG($to_mode_oct)) { # only for regular file
2947                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2948                         }
2949                         $to_file_type = file_type($diff->{'to_mode'});
2950                 }
2951                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2952                         $from_mode_oct = oct $diff->{'from_mode'};
2953                         if (S_ISREG($to_mode_oct)) { # only for regular file
2954                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2955                         }
2956                         $from_file_type = file_type($diff->{'from_mode'});
2957                 }
2958
2959                 if ($diff->{'status'} eq "A") { # created
2960                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2961                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2962                         $mode_chng   .= "]</span>";
2963                         print "<td>";
2964                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2965                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2966                                       -class => "list"}, esc_path($diff->{'file'}));
2967                         print "</td>\n";
2968                         print "<td>$mode_chng</td>\n";
2969                         print "<td class=\"link\">";
2970                         if ($action eq 'commitdiff') {
2971                                 # link to patch
2972                                 $patchno++;
2973                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2974                                 print " | ";
2975                         }
2976                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2977                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2978                                       "blob");
2979                         print "</td>\n";
2980
2981                 } elsif ($diff->{'status'} eq "D") { # deleted
2982                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2983                         print "<td>";
2984                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2985                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2986                                        -class => "list"}, esc_path($diff->{'file'}));
2987                         print "</td>\n";
2988                         print "<td>$mode_chng</td>\n";
2989                         print "<td class=\"link\">";
2990                         if ($action eq 'commitdiff') {
2991                                 # link to patch
2992                                 $patchno++;
2993                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2994                                 print " | ";
2995                         }
2996                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2997                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2998                                       "blob") . " | ";
2999                         if ($have_blame) {
3000                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3001                                                              file_name=>$diff->{'file'})},
3002                                               "blame") . " | ";
3003                         }
3004                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3005                                                      file_name=>$diff->{'file'})},
3006                                       "history");
3007                         print "</td>\n";
3008
3009                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3010                         my $mode_chnge = "";
3011                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3012                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3013                                 if ($from_file_type ne $to_file_type) {
3014                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3015                                 }
3016                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3017                                         if ($from_mode_str && $to_mode_str) {
3018                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3019                                         } elsif ($to_mode_str) {
3020                                                 $mode_chnge .= " mode: $to_mode_str";
3021                                         }
3022                                 }
3023                                 $mode_chnge .= "]</span>\n";
3024                         }
3025                         print "<td>";
3026                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3027                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3028                                       -class => "list"}, esc_path($diff->{'file'}));
3029                         print "</td>\n";
3030                         print "<td>$mode_chnge</td>\n";
3031                         print "<td class=\"link\">";
3032                         if ($action eq 'commitdiff') {
3033                                 # link to patch
3034                                 $patchno++;
3035                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3036                                       " | ";
3037                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3038                                 # "commit" view and modified file (not onlu mode changed)
3039                                 print $cgi->a({-href => href(action=>"blobdiff",
3040                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3041                                                              hash_base=>$hash, hash_parent_base=>$parent,
3042                                                              file_name=>$diff->{'file'})},
3043                                               "diff") .
3044                                       " | ";
3045                         }
3046                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3047                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3048                                        "blob") . " | ";
3049                         if ($have_blame) {
3050                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3051                                                              file_name=>$diff->{'file'})},
3052                                               "blame") . " | ";
3053                         }
3054                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3055                                                      file_name=>$diff->{'file'})},
3056                                       "history");
3057                         print "</td>\n";
3058
3059                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3060                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3061                         my $nstatus = $status_name{$diff->{'status'}};
3062                         my $mode_chng = "";
3063                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3064                                 # mode also for directories, so we cannot use $to_mode_str
3065                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3066                         }
3067                         print "<td>" .
3068                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3069                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3070                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3071                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3072                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3073                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3074                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3075                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3076                               "<td class=\"link\">";
3077                         if ($action eq 'commitdiff') {
3078                                 # link to patch
3079                                 $patchno++;
3080                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3081                                       " | ";
3082                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3083                                 # "commit" view and modified file (not only pure rename or copy)
3084                                 print $cgi->a({-href => href(action=>"blobdiff",
3085                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3086                                                              hash_base=>$hash, hash_parent_base=>$parent,
3087                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3088                                               "diff") .
3089                                       " | ";
3090                         }
3091                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3092                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3093                                       "blob") . " | ";
3094                         if ($have_blame) {
3095                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3096                                                              file_name=>$diff->{'to_file'})},
3097                                               "blame") . " | ";
3098                         }
3099                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3100                                                     file_name=>$diff->{'to_file'})},
3101                                       "history");
3102                         print "</td>\n";
3103
3104                 } # we should not encounter Unmerged (U) or Unknown (X) status
3105                 print "</tr>\n";
3106         }
3107         print "</tbody>" if $has_header;
3108         print "</table>\n";
3109 }
3110
3111 sub git_patchset_body {
3112         my ($fd, $difftree, $hash, @hash_parents) = @_;
3113         my ($hash_parent) = $hash_parents[0];
3114
3115         my $patch_idx = 0;
3116         my $patch_number = 0;
3117         my $patch_line;
3118         my $diffinfo;
3119         my (%from, %to);
3120
3121         print "<div class=\"patchset\">\n";
3122
3123         # skip to first patch
3124         while ($patch_line = <$fd>) {
3125                 chomp $patch_line;
3126
3127                 last if ($patch_line =~ m/^diff /);
3128         }
3129
3130  PATCH:
3131         while ($patch_line) {
3132                 my @diff_header;
3133                 my ($from_id, $to_id);
3134
3135                 # git diff header
3136                 #assert($patch_line =~ m/^diff /) if DEBUG;
3137                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3138                 $patch_number++;
3139                 push @diff_header, $patch_line;
3140
3141                 # extended diff header
3142         EXTENDED_HEADER:
3143                 while ($patch_line = <$fd>) {
3144                         chomp $patch_line;
3145
3146                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3147
3148                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3149                                 $from_id = $1;
3150                                 $to_id   = $2;
3151                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3152                                 $from_id = [ split(',', $1) ];
3153                                 $to_id   = $2;
3154                         }
3155
3156                         push @diff_header, $patch_line;
3157                 }
3158                 my $last_patch_line = $patch_line;
3159
3160                 # check if current patch belong to current raw line
3161                 # and parse raw git-diff line if needed
3162                 if (defined $diffinfo &&
3163                     defined $from_id && defined $to_id &&
3164                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3165                     $diffinfo->{'to_id'} eq $to_id) {
3166                         # this is continuation of a split patch
3167                         print "<div class=\"patch cont\">\n";
3168                 } else {
3169                         # advance raw git-diff output if needed
3170                         $patch_idx++ if defined $diffinfo;
3171
3172                         # compact combined diff output can have some patches skipped
3173                         # find which patch (using pathname of result) we are at now
3174                         my $to_name;
3175                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3176                                 $to_name = $1;
3177                         }
3178
3179                         do {
3180                                 # read and prepare patch information
3181                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3182                                         # pre-parsed (or generated by hand)
3183                                         $diffinfo = $difftree->[$patch_idx];
3184                                 } else {
3185                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3186                                 }
3187
3188                                 # check if current raw line has no patch (it got simplified)
3189                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3190                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3191                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3192                                               "</div>\n";  # class="patch"
3193
3194                                         $patch_idx++;
3195                                         $patch_number++;
3196                                 }
3197                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3198                                  $patch_idx > $#$difftree);
3199
3200                         # modifies %from, %to hashes
3201                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3202
3203                         # this is first patch for raw difftree line with $patch_idx index
3204                         # we index @$difftree array from 0, but number patches from 1
3205                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3206                 }
3207
3208                 # print "git diff" header
3209                 $patch_line = shift @diff_header;
3210                 print format_git_diff_header_line($patch_line, $diffinfo,
3211                                                   \%from, \%to);
3212
3213                 # print extended diff header
3214                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3215         EXTENDED_HEADER:
3216                 foreach $patch_line (@diff_header) {
3217                         print format_extended_diff_header_line($patch_line, $diffinfo,
3218                                                                \%from, \%to);
3219                 }
3220                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3221
3222                 # from-file/to-file diff header
3223                 $patch_line = $last_patch_line;
3224                 if (! $patch_line) {
3225                         print "</div>\n"; # class="patch"
3226                         last PATCH;
3227                 }
3228                 next PATCH if ($patch_line =~ m/^diff /);
3229                 #assert($patch_line =~ m/^---/) if DEBUG;
3230                 #assert($patch_line eq $last_patch_line) if DEBUG;
3231
3232                 $patch_line = <$fd>;
3233                 chomp $patch_line;
3234                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3235
3236                 print format_diff_from_to_header($last_patch_line, $patch_line,
3237                                                  $diffinfo, \%from, \%to,
3238                                                  @hash_parents);
3239
3240                 # the patch itself
3241         LINE:
3242                 while ($patch_line = <$fd>) {
3243                         chomp $patch_line;
3244
3245                         next PATCH if ($patch_line =~ m/^diff /);
3246
3247                         print format_diff_line($patch_line, \%from, \%to);
3248                 }
3249
3250         } continue {
3251                 print "</div>\n"; # class="patch"
3252         }
3253
3254         # for compact combined (--cc) format, with chunk and patch simpliciaction
3255         # patchset might be empty, but there might be unprocessed raw lines
3256         for ($patch_idx++ if $patch_number > 0;
3257              $patch_idx < @$difftree;
3258              $patch_idx++) {
3259                 # read and prepare patch information
3260                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3261                         # pre-parsed (or generated by hand)
3262                         $diffinfo = $difftree->[$patch_idx];
3263                 } else {
3264                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3265                 }
3266
3267                 # generate anchor for "patch" links in difftree / whatchanged part
3268                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3269                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3270                       "</div>\n";  # class="patch"
3271
3272                 $patch_number++;
3273         }
3274
3275         if ($patch_number == 0) {
3276                 if (@hash_parents > 1) {
3277                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3278                 } else {
3279                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3280                 }
3281         }
3282
3283         print "</div>\n"; # class="patchset"
3284 }
3285
3286 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3287
3288 sub git_project_list_body {
3289         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3290
3291         my ($check_forks) = gitweb_check_feature('forks');
3292
3293         my @projects;
3294         foreach my $pr (@$projlist) {
3295                 my (@aa) = git_get_last_activity($pr->{'path'});
3296                 unless (@aa) {
3297                         next;
3298                 }
3299                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3300                 if (!defined $pr->{'descr'}) {
3301                         my $descr = git_get_project_description($pr->{'path'}) || "";
3302                         $pr->{'descr_long'} = to_utf8($descr);
3303                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3304                 }
3305                 if (!defined $pr->{'owner'}) {
3306                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3307                 }
3308                 if ($check_forks) {
3309                         my $pname = $pr->{'path'};
3310                         if (($pname =~ s/\.git$//) &&
3311                             ($pname !~ /\/$/) &&
3312                             (-d "$projectroot/$pname")) {
3313                                 $pr->{'forks'} = "-d $projectroot/$pname";
3314                         }
3315                         else {
3316                                 $pr->{'forks'} = 0;
3317                         }
3318                 }
3319                 push @projects, $pr;
3320         }
3321
3322         $order ||= $default_projects_order;
3323         $from = 0 unless defined $from;
3324         $to = $#projects if (!defined $to || $#projects < $to);
3325
3326         print "<table class=\"project_list\">\n";
3327         unless ($no_header) {
3328                 print "<tr>\n";
3329                 if ($check_forks) {
3330                         print "<th></th>\n";
3331                 }
3332                 if ($order eq "project") {
3333                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3334                         print "<th>Project</th>\n";
3335                 } else {
3336                         print "<th>" .
3337                               $cgi->a({-href => href(project=>undef, order=>'project'),
3338                                        -class => "header"}, "Project") .
3339                               "</th>\n";
3340                 }
3341                 if ($order eq "descr") {
3342                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3343                         print "<th>Description</th>\n";
3344                 } else {
3345                         print "<th>" .
3346                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3347                                        -class => "header"}, "Description") .
3348                               "</th>\n";
3349                 }
3350                 if ($order eq "owner") {
3351                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3352                         print "<th>Owner</th>\n";
3353                 } else {
3354                         print "<th>" .
3355                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3356                                        -class => "header"}, "Owner") .
3357                               "</th>\n";
3358                 }
3359                 if ($order eq "age") {
3360                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3361                         print "<th>Last Change</th>\n";
3362                 } else {
3363                         print "<th>" .
3364                               $cgi->a({-href => href(project=>undef, order=>'age'),
3365                                        -class => "header"}, "Last Change") .
3366                               "</th>\n";
3367                 }
3368                 print "<th></th>\n" .
3369                       "</tr>\n";
3370         }
3371         my $alternate = 1;
3372         for (my $i = $from; $i <= $to; $i++) {
3373                 my $pr = $projects[$i];
3374                 if ($alternate) {
3375                         print "<tr class=\"dark\">\n";
3376                 } else {
3377                         print "<tr class=\"light\">\n";
3378                 }
3379                 $alternate ^= 1;
3380                 if ($check_forks) {
3381                         print "<td>";
3382                         if ($pr->{'forks'}) {
3383                                 print "<!-- $pr->{'forks'} -->\n";
3384                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3385                         }
3386                         print "</td>\n";
3387                 }
3388                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3389                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3390                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3391                                         -class => "list", -title => $pr->{'descr_long'}},
3392                                         esc_html($pr->{'descr'})) . "</td>\n" .
3393                       "<td><i>" . esc_html(chop_str($pr->{'owner'}, 15)) . "</i></td>\n";
3394                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3395                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3396                       "<td class=\"link\">" .
3397                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3398                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3399                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3400                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3401                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3402                       "</td>\n" .
3403                       "</tr>\n";
3404         }
3405         if (defined $extra) {
3406                 print "<tr>\n";
3407                 if ($check_forks) {
3408                         print "<td></td>\n";
3409                 }
3410                 print "<td colspan=\"5\">$extra</td>\n" .
3411                       "</tr>\n";
3412         }
3413         print "</table>\n";
3414 }
3415
3416 sub git_shortlog_body {
3417         # uses global variable $project
3418         my ($commitlist, $from, $to, $refs, $extra) = @_;
3419
3420         $from = 0 unless defined $from;
3421         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3422
3423         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3424         my $alternate = 1;
3425         for (my $i = $from; $i <= $to; $i++) {
3426                 my %co = %{$commitlist->[$i]};
3427                 my $commit = $co{'id'};
3428                 my $ref = format_ref_marker($refs, $commit);
3429                 if ($alternate) {
3430                         print "<tr class=\"dark\">\n";
3431                 } else {
3432                         print "<tr class=\"light\">\n";
3433                 }
3434                 $alternate ^= 1;
3435                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3436                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3437                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3438                       "<td>";
3439                 print format_subject_html($co{'title'}, $co{'title_short'},
3440                                           href(action=>"commit", hash=>$commit), $ref);
3441                 print "</td>\n" .
3442                       "<td class=\"link\">" .
3443                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3444                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3445                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3446                 my $snapshot_links = format_snapshot_links($commit);
3447                 if (defined $snapshot_links) {
3448                         print " | " . $snapshot_links;
3449                 }
3450                 print "</td>\n" .
3451                       "</tr>\n";
3452         }
3453         if (defined $extra) {
3454                 print "<tr>\n" .
3455                       "<td colspan=\"4\">$extra</td>\n" .
3456                       "</tr>\n";
3457         }
3458         print "</table>\n";
3459 }
3460
3461 sub git_history_body {
3462         # Warning: assumes constant type (blob or tree) during history
3463         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3464
3465         $from = 0 unless defined $from;
3466         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3467
3468         print "<table class=\"history\" cellspacing=\"0\">\n";
3469         my $alternate = 1;
3470         for (my $i = $from; $i <= $to; $i++) {
3471                 my %co = %{$commitlist->[$i]};
3472                 if (!%co) {
3473                         next;
3474                 }
3475                 my $commit = $co{'id'};
3476
3477                 my $ref = format_ref_marker($refs, $commit);
3478
3479                 if ($alternate) {
3480                         print "<tr class=\"dark\">\n";
3481                 } else {
3482                         print "<tr class=\"light\">\n";
3483                 }
3484                 $alternate ^= 1;
3485                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3486                       # shortlog uses      chop_str($co{'author_name'}, 10)
3487                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3488                       "<td>";
3489                 # originally git_history used chop_str($co{'title'}, 50)
3490                 print format_subject_html($co{'title'}, $co{'title_short'},
3491                                           href(action=>"commit", hash=>$commit), $ref);
3492                 print "</td>\n" .
3493                       "<td class=\"link\">" .
3494                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3495                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3496
3497                 if ($ftype eq 'blob') {
3498                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3499                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3500                         if (defined $blob_current && defined $blob_parent &&
3501                                         $blob_current ne $blob_parent) {
3502                                 print " | " .
3503                                         $cgi->a({-href => href(action=>"blobdiff",
3504                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3505                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3506                                                                file_name=>$file_name)},
3507                                                 "diff to current");
3508                         }
3509                 }
3510                 print "</td>\n" .
3511                       "</tr>\n";
3512         }
3513         if (defined $extra) {
3514                 print "<tr>\n" .
3515                       "<td colspan=\"4\">$extra</td>\n" .
3516                       "</tr>\n";
3517         }
3518         print "</table>\n";
3519 }
3520
3521 sub git_tags_body {
3522         # uses global variable $project
3523         my ($taglist, $from, $to, $extra) = @_;
3524         $from = 0 unless defined $from;
3525         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3526
3527         print "<table class=\"tags\" cellspacing=\"0\">\n";
3528         my $alternate = 1;
3529         for (my $i = $from; $i <= $to; $i++) {
3530                 my $entry = $taglist->[$i];
3531                 my %tag = %$entry;
3532                 my $comment = $tag{'subject'};
3533                 my $comment_short;
3534                 if (defined $comment) {
3535                         $comment_short = chop_str($comment, 30, 5);
3536                 }
3537                 if ($alternate) {
3538                         print "<tr class=\"dark\">\n";
3539                 } else {
3540                         print "<tr class=\"light\">\n";
3541                 }
3542                 $alternate ^= 1;
3543                 if (defined $tag{'age'}) {
3544                         print "<td><i>$tag{'age'}</i></td>\n";
3545                 } else {
3546                         print "<td></td>\n";
3547                 }
3548                 print "<td>" .
3549                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3550                                -class => "list name"}, esc_html($tag{'name'})) .
3551                       "</td>\n" .
3552                       "<td>";
3553                 if (defined $comment) {
3554                         print format_subject_html($comment, $comment_short,
3555                                                   href(action=>"tag", hash=>$tag{'id'}));
3556                 }
3557                 print "</td>\n" .
3558                       "<td class=\"selflink\">";
3559                 if ($tag{'type'} eq "tag") {
3560                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3561                 } else {
3562                         print "&nbsp;";
3563                 }
3564                 print "</td>\n" .
3565                       "<td class=\"link\">" . " | " .
3566                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3567                 if ($tag{'reftype'} eq "commit") {
3568                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3569                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3570                 } elsif ($tag{'reftype'} eq "blob") {
3571                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3572                 }
3573                 print "</td>\n" .
3574                       "</tr>";
3575         }
3576         if (defined $extra) {
3577                 print "<tr>\n" .
3578                       "<td colspan=\"5\">$extra</td>\n" .
3579                       "</tr>\n";
3580         }
3581         print "</table>\n";
3582 }
3583
3584 sub git_heads_body {
3585         # uses global variable $project
3586         my ($headlist, $head, $from, $to, $extra) = @_;
3587         $from = 0 unless defined $from;
3588         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3589
3590         print "<table class=\"heads\" cellspacing=\"0\">\n";
3591         my $alternate = 1;
3592         for (my $i = $from; $i <= $to; $i++) {
3593                 my $entry = $headlist->[$i];
3594                 my %ref = %$entry;
3595                 my $curr = $ref{'id'} eq $head;
3596                 if ($alternate) {
3597                         print "<tr class=\"dark\">\n";
3598                 } else {
3599                         print "<tr class=\"light\">\n";
3600                 }
3601                 $alternate ^= 1;
3602                 print "<td><i>$ref{'age'}</i></td>\n" .
3603                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3604                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3605                                -class => "list name"},esc_html($ref{'name'})) .
3606                       "</td>\n" .
3607                       "<td class=\"link\">" .
3608                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3609                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3610                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3611                       "</td>\n" .
3612                       "</tr>";
3613         }
3614         if (defined $extra) {
3615                 print "<tr>\n" .
3616                       "<td colspan=\"3\">$extra</td>\n" .
3617                       "</tr>\n";
3618         }
3619         print "</table>\n";
3620 }
3621
3622 sub git_search_grep_body {
3623         my ($commitlist, $from, $to, $extra) = @_;
3624         $from = 0 unless defined $from;
3625         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3626
3627         print "<table class=\"grep\" cellspacing=\"0\">\n";
3628         my $alternate = 1;
3629         for (my $i = $from; $i <= $to; $i++) {
3630                 my %co = %{$commitlist->[$i]};
3631                 if (!%co) {
3632                         next;
3633                 }
3634                 my $commit = $co{'id'};
3635                 if ($alternate) {
3636                         print "<tr class=\"dark\">\n";
3637                 } else {
3638                         print "<tr class=\"light\">\n";
3639                 }
3640                 $alternate ^= 1;
3641                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3642                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3643                       "<td>" .
3644                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3645                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3646                 my $comment = $co{'comment'};
3647                 foreach my $line (@$comment) {
3648                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3649                                 my $lead = esc_html($1) || "";
3650                                 $lead = chop_str($lead, 30, 10);
3651                                 my $match = esc_html($2) || "";
3652                                 my $trail = esc_html($3) || "";
3653                                 $trail = chop_str($trail, 30, 10);
3654                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3655                                 print chop_str($text, 80, 5) . "<br/>\n";
3656                         }
3657                 }
3658                 print "</td>\n" .
3659                       "<td class=\"link\">" .
3660                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3661                       " | " .
3662                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3663                 print "</td>\n" .
3664                       "</tr>\n";
3665         }
3666         if (defined $extra) {
3667                 print "<tr>\n" .
3668                       "<td colspan=\"3\">$extra</td>\n" .
3669                       "</tr>\n";
3670         }
3671         print "</table>\n";
3672 }
3673
3674 ## ======================================================================
3675 ## ======================================================================
3676 ## actions
3677
3678 sub git_project_list {
3679         my $order = $cgi->param('o');
3680         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3681                 die_error(undef, "Unknown order parameter");
3682         }
3683
3684         my @list = git_get_projects_list();
3685         if (!@list) {
3686                 die_error(undef, "No projects found");
3687         }
3688
3689         git_header_html();
3690         if (-f $home_text) {
3691                 print "<div class=\"index_include\">\n";
3692                 open (my $fd, $home_text);
3693                 print <$fd>;
3694                 close $fd;
3695                 print "</div>\n";
3696         }
3697         git_project_list_body(\@list, $order);
3698         git_footer_html();
3699 }
3700
3701 sub git_forks {
3702         my $order = $cgi->param('o');
3703         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3704                 die_error(undef, "Unknown order parameter");
3705         }
3706
3707         my @list = git_get_projects_list($project);
3708         if (!@list) {
3709                 die_error(undef, "No forks found");
3710         }
3711
3712         git_header_html();
3713         git_print_page_nav('','');
3714         git_print_header_div('summary', "$project forks");
3715         git_project_list_body(\@list, $order);
3716         git_footer_html();
3717 }
3718
3719 sub git_project_index {
3720         my @projects = git_get_projects_list($project);
3721
3722         print $cgi->header(
3723                 -type => 'text/plain',
3724                 -charset => 'utf-8',
3725                 -content_disposition => 'inline; filename="index.aux"');
3726
3727         foreach my $pr (@projects) {
3728                 if (!exists $pr->{'owner'}) {
3729                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3730                 }
3731
3732                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3733                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3734                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3735                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3736                 $path  =~ s/ /\+/g;
3737                 $owner =~ s/ /\+/g;
3738
3739                 print "$path $owner\n";
3740         }
3741 }
3742
3743 sub git_summary {
3744         my $descr = git_get_project_description($project) || "none";
3745         my %co = parse_commit("HEAD");
3746         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3747         my $head = $co{'id'};
3748
3749         my $owner = git_get_project_owner($project);
3750
3751         my $refs = git_get_references();
3752         # These get_*_list functions return one more to allow us to see if
3753         # there are more ...
3754         my @taglist  = git_get_tags_list(16);
3755         my @headlist = git_get_heads_list(16);
3756         my @forklist;
3757         my ($check_forks) = gitweb_check_feature('forks');
3758
3759         if ($check_forks) {
3760                 @forklist = git_get_projects_list($project);
3761         }
3762
3763         git_header_html();
3764         git_print_page_nav('summary','', $head);
3765
3766         print "<div class=\"title\">&nbsp;</div>\n";
3767         print "<table cellspacing=\"0\">\n" .
3768               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3769               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3770         if (defined $cd{'rfc2822'}) {
3771                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3772         }
3773
3774         # use per project git URL list in $projectroot/$project/cloneurl
3775         # or make project git URL from git base URL and project name
3776         my $url_tag = "URL";
3777         my @url_list = git_get_project_url_list($project);
3778         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3779         foreach my $git_url (@url_list) {
3780                 next unless $git_url;
3781                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3782                 $url_tag = "";
3783         }
3784         print "</table>\n";
3785
3786         if (-s "$projectroot/$project/README.html") {
3787                 if (open my $fd, "$projectroot/$project/README.html") {
3788                         print "<div class=\"title\">readme</div>\n";
3789                         print $_ while (<$fd>);
3790                         close $fd;
3791                 }
3792         }
3793
3794         # we need to request one more than 16 (0..15) to check if
3795         # those 16 are all
3796         my @commitlist = $head ? parse_commits($head, 17) : ();
3797         if (@commitlist) {
3798                 git_print_header_div('shortlog');
3799                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3800                                   $#commitlist <=  15 ? undef :
3801                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3802         }
3803
3804         if (@taglist) {
3805                 git_print_header_div('tags');
3806                 git_tags_body(\@taglist, 0, 15,
3807                               $#taglist <=  15 ? undef :
3808                               $cgi->a({-href => href(action=>"tags")}, "..."));
3809         }
3810
3811         if (@headlist) {
3812                 git_print_header_div('heads');
3813                 git_heads_body(\@headlist, $head, 0, 15,
3814                                $#headlist <= 15 ? undef :
3815                                $cgi->a({-href => href(action=>"heads")}, "..."));
3816         }
3817
3818         if (@forklist) {
3819                 git_print_header_div('forks');
3820                 git_project_list_body(\@forklist, undef, 0, 15,
3821                                       $#forklist <= 15 ? undef :
3822                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3823                                       'noheader');
3824         }
3825
3826         git_footer_html();
3827 }
3828
3829 sub git_tag {
3830         my $head = git_get_head_hash($project);
3831         git_header_html();
3832         git_print_page_nav('','', $head,undef,$head);
3833         my %tag = parse_tag($hash);
3834
3835         if (! %tag) {
3836                 die_error(undef, "Unknown tag object");
3837         }
3838
3839         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3840         print "<div class=\"title_text\">\n" .
3841               "<table cellspacing=\"0\">\n" .
3842               "<tr>\n" .
3843               "<td>object</td>\n" .
3844               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3845                                $tag{'object'}) . "</td>\n" .
3846               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3847                                               $tag{'type'}) . "</td>\n" .
3848               "</tr>\n";
3849         if (defined($tag{'author'})) {
3850                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3851                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3852                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3853                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3854                         "</td></tr>\n";
3855         }
3856         print "</table>\n\n" .
3857               "</div>\n";
3858         print "<div class=\"page_body\">";
3859         my $comment = $tag{'comment'};
3860         foreach my $line (@$comment) {
3861                 chomp $line;
3862                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3863         }
3864         print "</div>\n";
3865         git_footer_html();
3866 }
3867
3868 sub git_blame2 {
3869         my $fd;
3870         my $ftype;
3871
3872         my ($have_blame) = gitweb_check_feature('blame');
3873         if (!$have_blame) {
3874                 die_error('403 Permission denied', "Permission denied");
3875         }
3876         die_error('404 Not Found', "File name not defined") if (!$file_name);
3877         $hash_base ||= git_get_head_hash($project);
3878         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3879         my %co = parse_commit($hash_base)
3880                 or die_error(undef, "Reading commit failed");
3881         if (!defined $hash) {
3882                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3883                         or die_error(undef, "Error looking up file");
3884         }
3885         $ftype = git_get_type($hash);
3886         if ($ftype !~ "blob") {
3887                 die_error('400 Bad Request', "Object is not a blob");
3888         }
3889         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3890               $file_name, $hash_base)
3891                 or die_error(undef, "Open git-blame failed");
3892         git_header_html();
3893         my $formats_nav =
3894                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3895                         "blob") .
3896                 " | " .
3897                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3898                         "history") .
3899                 " | " .
3900                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3901                         "HEAD");
3902         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3903         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3904         git_print_page_path($file_name, $ftype, $hash_base);
3905         my @rev_color = (qw(light2 dark2));
3906         my $num_colors = scalar(@rev_color);
3907         my $current_color = 0;
3908         my $last_rev;
3909         print <<HTML;
3910 <div class="page_body">
3911 <table class="blame">
3912 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3913 HTML
3914         my %metainfo = ();
3915         while (1) {
3916                 $_ = <$fd>;
3917                 last unless defined $_;
3918                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3919                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3920                 if (!exists $metainfo{$full_rev}) {
3921                         $metainfo{$full_rev} = {};
3922                 }
3923                 my $meta = $metainfo{$full_rev};
3924                 while (<$fd>) {
3925                         last if (s/^\t//);
3926                         if (/^(\S+) (.*)$/) {
3927                                 $meta->{$1} = $2;
3928                         }
3929                 }
3930                 my $data = $_;
3931                 chomp $data;
3932                 my $rev = substr($full_rev, 0, 8);
3933                 my $author = $meta->{'author'};
3934                 my %date = parse_date($meta->{'author-time'},
3935                                       $meta->{'author-tz'});
3936                 my $date = $date{'iso-tz'};
3937                 if ($group_size) {
3938                         $current_color = ++$current_color % $num_colors;
3939                 }
3940                 print "<tr class=\"$rev_color[$current_color]\">\n";
3941                 if ($group_size) {
3942                         print "<td class=\"sha1\"";
3943                         print " title=\"". esc_html($author) . ", $date\"";
3944                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3945                         print ">";
3946                         print $cgi->a({-href => href(action=>"commit",
3947                                                      hash=>$full_rev,
3948                                                      file_name=>$file_name)},
3949                                       esc_html($rev));
3950                         print "</td>\n";
3951                 }
3952                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3953                         or die_error(undef, "Open git-rev-parse failed");
3954                 my $parent_commit = <$dd>;
3955                 close $dd;
3956                 chomp($parent_commit);
3957                 my $blamed = href(action => 'blame',
3958                                   file_name => $meta->{'filename'},
3959                                   hash_base => $parent_commit);
3960                 print "<td class=\"linenr\">";
3961                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3962                                 -id => "l$lineno",
3963                                 -class => "linenr" },
3964                               esc_html($lineno));
3965                 print "</td>";
3966                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3967                 print "</tr>\n";
3968         }
3969         print "</table>\n";
3970         print "</div>";
3971         close $fd
3972                 or print "Reading blob failed\n";
3973         git_footer_html();
3974 }
3975
3976 sub git_blame {
3977         my $fd;
3978
3979         my ($have_blame) = gitweb_check_feature('blame');
3980         if (!$have_blame) {
3981                 die_error('403 Permission denied', "Permission denied");
3982         }
3983         die_error('404 Not Found', "File name not defined") if (!$file_name);
3984         $hash_base ||= git_get_head_hash($project);
3985         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3986         my %co = parse_commit($hash_base)
3987                 or die_error(undef, "Reading commit failed");
3988         if (!defined $hash) {
3989                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3990                         or die_error(undef, "Error lookup file");
3991         }
3992         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
3993                 or die_error(undef, "Open git-annotate failed");
3994         git_header_html();
3995         my $formats_nav =
3996                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3997                         "blob") .
3998                 " | " .
3999                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4000                         "history") .
4001                 " | " .
4002                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4003                         "HEAD");
4004         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4005         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4006         git_print_page_path($file_name, 'blob', $hash_base);
4007         print "<div class=\"page_body\">\n";
4008         print <<HTML;
4009 <table class="blame">
4010   <tr>
4011     <th>Commit</th>
4012     <th>Age</th>
4013     <th>Author</th>
4014     <th>Line</th>
4015     <th>Data</th>
4016   </tr>
4017 HTML
4018         my @line_class = (qw(light dark));
4019         my $line_class_len = scalar (@line_class);
4020         my $line_class_num = $#line_class;
4021         while (my $line = <$fd>) {
4022                 my $long_rev;
4023                 my $short_rev;
4024                 my $author;
4025                 my $time;
4026                 my $lineno;
4027                 my $data;
4028                 my $age;
4029                 my $age_str;
4030                 my $age_class;
4031
4032                 chomp $line;
4033                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4034
4035                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4036                         $long_rev = $1;
4037                         $author   = $2;
4038                         $time     = $3;
4039                         $lineno   = $4;
4040                         $data     = $5;
4041                 } else {
4042                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4043                         next;
4044                 }
4045                 $short_rev  = substr ($long_rev, 0, 8);
4046                 $age        = time () - $time;
4047                 $age_str    = age_string ($age);
4048                 $age_str    =~ s/ /&nbsp;/g;
4049                 $age_class  = age_class($age);
4050                 $author     = esc_html ($author);
4051                 $author     =~ s/ /&nbsp;/g;
4052
4053                 $data = untabify($data);
4054                 $data = esc_html ($data);
4055
4056                 print <<HTML;
4057   <tr class="$line_class[$line_class_num]">
4058     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4059     <td class="$age_class">$age_str</td>
4060     <td>$author</td>
4061     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4062     <td class="pre">$data</td>
4063   </tr>
4064 HTML
4065         } # while (my $line = <$fd>)
4066         print "</table>\n\n";
4067         close $fd
4068                 or print "Reading blob failed.\n";
4069         print "</div>";
4070         git_footer_html();
4071 }
4072
4073 sub git_tags {
4074         my $head = git_get_head_hash($project);
4075         git_header_html();
4076         git_print_page_nav('','', $head,undef,$head);
4077         git_print_header_div('summary', $project);
4078
4079         my @tagslist = git_get_tags_list();
4080         if (@tagslist) {
4081                 git_tags_body(\@tagslist);
4082         }
4083         git_footer_html();
4084 }
4085
4086 sub git_heads {
4087         my $head = git_get_head_hash($project);
4088         git_header_html();
4089         git_print_page_nav('','', $head,undef,$head);
4090         git_print_header_div('summary', $project);
4091
4092         my @headslist = git_get_heads_list();
4093         if (@headslist) {
4094                 git_heads_body(\@headslist, $head);
4095         }
4096         git_footer_html();
4097 }
4098
4099 sub git_blob_plain {
4100         my $expires;
4101
4102         if (!defined $hash) {
4103                 if (defined $file_name) {
4104                         my $base = $hash_base || git_get_head_hash($project);
4105                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4106                                 or die_error(undef, "Error lookup file");
4107                 } else {
4108                         die_error(undef, "No file name defined");
4109                 }
4110         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4111                 # blobs defined by non-textual hash id's can be cached
4112                 $expires = "+1d";
4113         }
4114
4115         my $type = shift;
4116         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4117                 or die_error(undef, "Couldn't cat $file_name, $hash");
4118
4119         $type ||= blob_mimetype($fd, $file_name);
4120
4121         # save as filename, even when no $file_name is given
4122         my $save_as = "$hash";
4123         if (defined $file_name) {
4124                 $save_as = $file_name;
4125         } elsif ($type =~ m/^text\//) {
4126                 $save_as .= '.txt';
4127         }
4128
4129         print $cgi->header(
4130                 -type => "$type",
4131                 -expires=>$expires,
4132                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4133         undef $/;
4134         binmode STDOUT, ':raw';
4135         print <$fd>;
4136         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4137         $/ = "\n";
4138         close $fd;
4139 }
4140
4141 sub git_blob {
4142         my $expires;
4143
4144         if (!defined $hash) {
4145                 if (defined $file_name) {
4146                         my $base = $hash_base || git_get_head_hash($project);
4147                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4148                                 or die_error(undef, "Error lookup file");
4149                 } else {
4150                         die_error(undef, "No file name defined");
4151                 }
4152         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4153                 # blobs defined by non-textual hash id's can be cached
4154                 $expires = "+1d";
4155         }
4156
4157         my ($have_blame) = gitweb_check_feature('blame');
4158         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4159                 or die_error(undef, "Couldn't cat $file_name, $hash");
4160         my $mimetype = blob_mimetype($fd, $file_name);
4161         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4162                 close $fd;
4163                 return git_blob_plain($mimetype);
4164         }
4165         # we can have blame only for text/* mimetype
4166         $have_blame &&= ($mimetype =~ m!^text/!);
4167
4168         git_header_html(undef, $expires);
4169         my $formats_nav = '';
4170         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4171                 if (defined $file_name) {
4172                         if ($have_blame) {
4173                                 $formats_nav .=
4174                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4175                                                                hash=>$hash, file_name=>$file_name)},
4176                                                 "blame") .
4177                                         " | ";
4178                         }
4179                         $formats_nav .=
4180                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4181                                                        hash=>$hash, file_name=>$file_name)},
4182                                         "history") .
4183                                 " | " .
4184                                 $cgi->a({-href => href(action=>"blob_plain",
4185                                                        hash=>$hash, file_name=>$file_name)},
4186                                         "raw") .
4187                                 " | " .
4188                                 $cgi->a({-href => href(action=>"blob",
4189                                                        hash_base=>"HEAD", file_name=>$file_name)},
4190                                         "HEAD");
4191                 } else {
4192                         $formats_nav .=
4193                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4194                 }
4195                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4196                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4197         } else {
4198                 print "<div class=\"page_nav\">\n" .
4199                       "<br/><br/></div>\n" .
4200                       "<div class=\"title\">$hash</div>\n";
4201         }
4202         git_print_page_path($file_name, "blob", $hash_base);
4203         print "<div class=\"page_body\">\n";
4204         if ($mimetype =~ m!^text/!) {
4205                 my $nr;
4206                 while (my $line = <$fd>) {
4207                         chomp $line;
4208                         $nr++;
4209                         $line = untabify($line);
4210                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4211                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4212                 }
4213         } elsif ($mimetype =~ m!^image/!) {
4214                 print qq!<img type="$mimetype"!;
4215                 if ($file_name) {
4216                         print qq! alt="$file_name" title="$file_name"!;
4217                 }
4218                 print qq! src="! .
4219                       href(action=>"blob_plain", hash=>$hash,
4220                            hash_base=>$hash_base, file_name=>$file_name) .
4221                       qq!" />\n!;
4222         }
4223         close $fd
4224                 or print "Reading blob failed.\n";
4225         print "</div>";
4226         git_footer_html();
4227 }
4228
4229 sub git_tree {
4230         if (!defined $hash_base) {
4231                 $hash_base = "HEAD";
4232         }
4233         if (!defined $hash) {
4234                 if (defined $file_name) {
4235                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4236                 } else {
4237                         $hash = $hash_base;
4238                 }
4239         }
4240         $/ = "\0";
4241         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4242                 or die_error(undef, "Open git-ls-tree failed");
4243         my @entries = map { chomp; $_ } <$fd>;
4244         close $fd or die_error(undef, "Reading tree failed");
4245         $/ = "\n";
4246
4247         my $refs = git_get_references();
4248         my $ref = format_ref_marker($refs, $hash_base);
4249         git_header_html();
4250         my $basedir = '';
4251         my ($have_blame) = gitweb_check_feature('blame');
4252         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4253                 my @views_nav = ();
4254                 if (defined $file_name) {
4255                         push @views_nav,
4256                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4257                                                        hash=>$hash, file_name=>$file_name)},
4258                                         "history"),
4259                                 $cgi->a({-href => href(action=>"tree",
4260                                                        hash_base=>"HEAD", file_name=>$file_name)},
4261                                         "HEAD"),
4262                 }
4263                 my $snapshot_links = format_snapshot_links($hash);
4264                 if (defined $snapshot_links) {
4265                         # FIXME: Should be available when we have no hash base as well.
4266                         push @views_nav, $snapshot_links;
4267                 }
4268                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4269                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4270         } else {
4271                 undef $hash_base;
4272                 print "<div class=\"page_nav\">\n";
4273                 print "<br/><br/></div>\n";
4274                 print "<div class=\"title\">$hash</div>\n";
4275         }
4276         if (defined $file_name) {
4277                 $basedir = $file_name;
4278                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4279                         $basedir .= '/';
4280                 }
4281         }
4282         git_print_page_path($file_name, 'tree', $hash_base);
4283         print "<div class=\"page_body\">\n";
4284         print "<table cellspacing=\"0\">\n";
4285         my $alternate = 1;
4286         # '..' (top directory) link if possible
4287         if (defined $hash_base &&
4288             defined $file_name && $file_name =~ m![^/]+$!) {
4289                 if ($alternate) {
4290                         print "<tr class=\"dark\">\n";
4291                 } else {
4292                         print "<tr class=\"light\">\n";
4293                 }
4294                 $alternate ^= 1;
4295
4296                 my $up = $file_name;
4297                 $up =~ s!/?[^/]+$!!;
4298                 undef $up unless $up;
4299                 # based on git_print_tree_entry
4300                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4301                 print '<td class="list">';
4302                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4303                                              file_name=>$up)},
4304                               "..");
4305                 print "</td>\n";
4306                 print "<td class=\"link\"></td>\n";
4307
4308                 print "</tr>\n";
4309         }
4310         foreach my $line (@entries) {
4311                 my %t = parse_ls_tree_line($line, -z => 1);
4312
4313                 if ($alternate) {
4314                         print "<tr class=\"dark\">\n";
4315                 } else {
4316                         print "<tr class=\"light\">\n";
4317                 }
4318                 $alternate ^= 1;
4319
4320                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4321
4322                 print "</tr>\n";
4323         }
4324         print "</table>\n" .
4325               "</div>";
4326         git_footer_html();
4327 }
4328
4329 sub git_snapshot {
4330         my @supported_fmts = gitweb_check_feature('snapshot');
4331         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4332
4333         my $format = $cgi->param('sf');
4334         if (!@supported_fmts) {
4335                 die_error('403 Permission denied', "Permission denied");
4336         }
4337         # default to first supported snapshot format
4338         $format ||= $supported_fmts[0];
4339         if ($format !~ m/^[a-z0-9]+$/) {
4340                 die_error(undef, "Invalid snapshot format parameter");
4341         } elsif (!exists($known_snapshot_formats{$format})) {
4342                 die_error(undef, "Unknown snapshot format");
4343         } elsif (!grep($_ eq $format, @supported_fmts)) {
4344                 die_error(undef, "Unsupported snapshot format");
4345         }
4346
4347         if (!defined $hash) {
4348                 $hash = git_get_head_hash($project);
4349         }
4350
4351         my $git_command = git_cmd_str();
4352         my $name = $project;
4353         $name =~ s,([^/])/*\.git$,$1,;
4354         $name = basename($name);
4355         my $filename = to_utf8($name);
4356         $name =~ s/\047/\047\\\047\047/g;
4357         my $cmd;
4358         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4359         $cmd = "$git_command archive " .
4360                 "--format=$known_snapshot_formats{$format}{'format'} " .
4361                 "--prefix=\'$name\'/ $hash";
4362         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4363                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4364         }
4365
4366         print $cgi->header(
4367                 -type => $known_snapshot_formats{$format}{'type'},
4368                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4369                 -status => '200 OK');
4370
4371         open my $fd, "-|", $cmd
4372                 or die_error(undef, "Execute git-archive failed");
4373         binmode STDOUT, ':raw';
4374         print <$fd>;
4375         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4376         close $fd;
4377 }
4378
4379 sub git_log {
4380         my $head = git_get_head_hash($project);
4381         if (!defined $hash) {
4382                 $hash = $head;
4383         }
4384         if (!defined $page) {
4385                 $page = 0;
4386         }
4387         my $refs = git_get_references();
4388
4389         my @commitlist = parse_commits($hash, 101, (100 * $page));
4390
4391         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4392
4393         git_header_html();
4394         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4395
4396         if (!@commitlist) {
4397                 my %co = parse_commit($hash);
4398
4399                 git_print_header_div('summary', $project);
4400                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4401         }
4402         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4403         for (my $i = 0; $i <= $to; $i++) {
4404                 my %co = %{$commitlist[$i]};
4405                 next if !%co;
4406                 my $commit = $co{'id'};
4407                 my $ref = format_ref_marker($refs, $commit);
4408                 my %ad = parse_date($co{'author_epoch'});
4409                 git_print_header_div('commit',
4410                                "<span class=\"age\">$co{'age_string'}</span>" .
4411                                esc_html($co{'title'}) . $ref,
4412                                $commit);
4413                 print "<div class=\"title_text\">\n" .
4414                       "<div class=\"log_link\">\n" .
4415                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4416                       " | " .
4417                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4418                       " | " .
4419                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4420                       "<br/>\n" .
4421                       "</div>\n" .
4422                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4423                       "</div>\n";
4424
4425                 print "<div class=\"log_body\">\n";
4426                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4427                 print "</div>\n";
4428         }
4429         if ($#commitlist >= 100) {
4430                 print "<div class=\"page_nav\">\n";
4431                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4432                                -accesskey => "n", -title => "Alt-n"}, "next");
4433                 print "</div>\n";
4434         }
4435         git_footer_html();
4436 }
4437
4438 sub git_commit {
4439         $hash ||= $hash_base || "HEAD";
4440         my %co = parse_commit($hash);
4441         if (!%co) {
4442                 die_error(undef, "Unknown commit object");
4443         }
4444         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4445         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4446
4447         my $parent  = $co{'parent'};
4448         my $parents = $co{'parents'}; # listref
4449
4450         # we need to prepare $formats_nav before any parameter munging
4451         my $formats_nav;
4452         if (!defined $parent) {
4453                 # --root commitdiff
4454                 $formats_nav .= '(initial)';
4455         } elsif (@$parents == 1) {
4456                 # single parent commit
4457                 $formats_nav .=
4458                         '(parent: ' .
4459                         $cgi->a({-href => href(action=>"commit",
4460                                                hash=>$parent)},
4461                                 esc_html(substr($parent, 0, 7))) .
4462                         ')';
4463         } else {
4464                 # merge commit
4465                 $formats_nav .=
4466                         '(merge: ' .
4467                         join(' ', map {
4468                                 $cgi->a({-href => href(action=>"commit",
4469                                                        hash=>$_)},
4470                                         esc_html(substr($_, 0, 7)));
4471                         } @$parents ) .
4472                         ')';
4473         }
4474
4475         if (!defined $parent) {
4476                 $parent = "--root";
4477         }
4478         my @difftree;
4479         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4480                 @diff_opts,
4481                 (@$parents <= 1 ? $parent : '-c'),
4482                 $hash, "--"
4483                 or die_error(undef, "Open git-diff-tree failed");
4484         @difftree = map { chomp; $_ } <$fd>;
4485         close $fd or die_error(undef, "Reading git-diff-tree failed");
4486
4487         # non-textual hash id's can be cached
4488         my $expires;
4489         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4490                 $expires = "+1d";
4491         }
4492         my $refs = git_get_references();
4493         my $ref = format_ref_marker($refs, $co{'id'});
4494
4495         git_header_html(undef, $expires);
4496         git_print_page_nav('commit', '',
4497                            $hash, $co{'tree'}, $hash,
4498                            $formats_nav);
4499
4500         if (defined $co{'parent'}) {
4501                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4502         } else {
4503                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4504         }
4505         print "<div class=\"title_text\">\n" .
4506               "<table cellspacing=\"0\">\n";
4507         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4508               "<tr>" .
4509               "<td></td><td> $ad{'rfc2822'}";
4510         if ($ad{'hour_local'} < 6) {
4511                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4512                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4513         } else {
4514                 printf(" (%02d:%02d %s)",
4515                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4516         }
4517         print "</td>" .
4518               "</tr>\n";
4519         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4520         print "<tr><td></td><td> $cd{'rfc2822'}" .
4521               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4522               "</td></tr>\n";
4523         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4524         print "<tr>" .
4525               "<td>tree</td>" .
4526               "<td class=\"sha1\">" .
4527               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4528                        class => "list"}, $co{'tree'}) .
4529               "</td>" .
4530               "<td class=\"link\">" .
4531               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4532                       "tree");
4533         my $snapshot_links = format_snapshot_links($hash);
4534         if (defined $snapshot_links) {
4535                 print " | " . $snapshot_links;
4536         }
4537         print "</td>" .
4538               "</tr>\n";
4539
4540         foreach my $par (@$parents) {
4541                 print "<tr>" .
4542                       "<td>parent</td>" .
4543                       "<td class=\"sha1\">" .
4544                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4545                                class => "list"}, $par) .
4546                       "</td>" .
4547                       "<td class=\"link\">" .
4548                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4549                       " | " .
4550                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4551                       "</td>" .
4552                       "</tr>\n";
4553         }
4554         print "</table>".
4555               "</div>\n";
4556
4557         print "<div class=\"page_body\">\n";
4558         git_print_log($co{'comment'});
4559         print "</div>\n";
4560
4561         git_difftree_body(\@difftree, $hash, @$parents);
4562
4563         git_footer_html();
4564 }
4565
4566 sub git_object {
4567         # object is defined by:
4568         # - hash or hash_base alone
4569         # - hash_base and file_name
4570         my $type;
4571
4572         # - hash or hash_base alone
4573         if ($hash || ($hash_base && !defined $file_name)) {
4574                 my $object_id = $hash || $hash_base;
4575
4576                 my $git_command = git_cmd_str();
4577                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4578                         or die_error('404 Not Found', "Object does not exist");
4579                 $type = <$fd>;
4580                 chomp $type;
4581                 close $fd
4582                         or die_error('404 Not Found', "Object does not exist");
4583
4584         # - hash_base and file_name
4585         } elsif ($hash_base && defined $file_name) {
4586                 $file_name =~ s,/+$,,;
4587
4588                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4589                         or die_error('404 Not Found', "Base object does not exist");
4590
4591                 # here errors should not hapen
4592                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4593                         or die_error(undef, "Open git-ls-tree failed");
4594                 my $line = <$fd>;
4595                 close $fd;
4596
4597                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4598                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4599                         die_error('404 Not Found', "File or directory for given base does not exist");
4600                 }
4601                 $type = $2;
4602                 $hash = $3;
4603         } else {
4604                 die_error('404 Not Found', "Not enough information to find object");
4605         }
4606
4607         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4608                                           hash=>$hash, hash_base=>$hash_base,
4609                                           file_name=>$file_name),
4610                              -status => '302 Found');
4611 }
4612
4613 sub git_blobdiff {
4614         my $format = shift || 'html';
4615
4616         my $fd;
4617         my @difftree;
4618         my %diffinfo;
4619         my $expires;
4620
4621         # preparing $fd and %diffinfo for git_patchset_body
4622         # new style URI
4623         if (defined $hash_base && defined $hash_parent_base) {
4624                 if (defined $file_name) {
4625                         # read raw output
4626                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4627                                 $hash_parent_base, $hash_base,
4628                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4629                                 or die_error(undef, "Open git-diff-tree failed");
4630                         @difftree = map { chomp; $_ } <$fd>;
4631                         close $fd
4632                                 or die_error(undef, "Reading git-diff-tree failed");
4633                         @difftree
4634                                 or die_error('404 Not Found', "Blob diff not found");
4635
4636                 } elsif (defined $hash &&
4637                          $hash =~ /[0-9a-fA-F]{40}/) {
4638                         # try to find filename from $hash
4639
4640                         # read filtered raw output
4641                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4642                                 $hash_parent_base, $hash_base, "--"
4643                                 or die_error(undef, "Open git-diff-tree failed");
4644                         @difftree =
4645                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4646                                 # $hash == to_id
4647                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4648                                 map { chomp; $_ } <$fd>;
4649                         close $fd
4650                                 or die_error(undef, "Reading git-diff-tree failed");
4651                         @difftree
4652                                 or die_error('404 Not Found', "Blob diff not found");
4653
4654                 } else {
4655                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4656                 }
4657
4658                 if (@difftree > 1) {
4659                         die_error('404 Not Found', "Ambiguous blob diff specification");
4660                 }
4661
4662                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4663                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4664                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4665
4666                 $hash_parent ||= $diffinfo{'from_id'};
4667                 $hash        ||= $diffinfo{'to_id'};
4668
4669                 # non-textual hash id's can be cached
4670                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4671                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4672                         $expires = '+1d';
4673                 }
4674
4675                 # open patch output
4676                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4677                         '-p', ($format eq 'html' ? "--full-index" : ()),
4678                         $hash_parent_base, $hash_base,
4679                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4680                         or die_error(undef, "Open git-diff-tree failed");
4681         }
4682
4683         # old/legacy style URI
4684         if (!%diffinfo && # if new style URI failed
4685             defined $hash && defined $hash_parent) {
4686                 # fake git-diff-tree raw output
4687                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4688                 $diffinfo{'from_id'} = $hash_parent;
4689                 $diffinfo{'to_id'}   = $hash;
4690                 if (defined $file_name) {
4691                         if (defined $file_parent) {
4692                                 $diffinfo{'status'} = '2';
4693                                 $diffinfo{'from_file'} = $file_parent;
4694                                 $diffinfo{'to_file'}   = $file_name;
4695                         } else { # assume not renamed
4696                                 $diffinfo{'status'} = '1';
4697                                 $diffinfo{'from_file'} = $file_name;
4698                                 $diffinfo{'to_file'}   = $file_name;
4699                         }
4700                 } else { # no filename given
4701                         $diffinfo{'status'} = '2';
4702                         $diffinfo{'from_file'} = $hash_parent;
4703                         $diffinfo{'to_file'}   = $hash;
4704                 }
4705
4706                 # non-textual hash id's can be cached
4707                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4708                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4709                         $expires = '+1d';
4710                 }
4711
4712                 # open patch output
4713                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4714                         '-p', ($format eq 'html' ? "--full-index" : ()),
4715                         $hash_parent, $hash, "--"
4716                         or die_error(undef, "Open git-diff failed");
4717         } else  {
4718                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4719                         unless %diffinfo;
4720         }
4721
4722         # header
4723         if ($format eq 'html') {
4724                 my $formats_nav =
4725                         $cgi->a({-href => href(action=>"blobdiff_plain",
4726                                                hash=>$hash, hash_parent=>$hash_parent,
4727                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4728                                                file_name=>$file_name, file_parent=>$file_parent)},
4729                                 "raw");
4730                 git_header_html(undef, $expires);
4731                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4732                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4733                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4734                 } else {
4735                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4736                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4737                 }
4738                 if (defined $file_name) {
4739                         git_print_page_path($file_name, "blob", $hash_base);
4740                 } else {
4741                         print "<div class=\"page_path\"></div>\n";
4742                 }
4743
4744         } elsif ($format eq 'plain') {
4745                 print $cgi->header(
4746                         -type => 'text/plain',
4747                         -charset => 'utf-8',
4748                         -expires => $expires,
4749                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4750
4751                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4752
4753         } else {
4754                 die_error(undef, "Unknown blobdiff format");
4755         }
4756
4757         # patch
4758         if ($format eq 'html') {
4759                 print "<div class=\"page_body\">\n";
4760
4761                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4762                 close $fd;
4763
4764                 print "</div>\n"; # class="page_body"
4765                 git_footer_html();
4766
4767         } else {
4768                 while (my $line = <$fd>) {
4769                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4770                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4771
4772                         print $line;
4773
4774                         last if $line =~ m!^\+\+\+!;
4775                 }
4776                 local $/ = undef;
4777                 print <$fd>;
4778                 close $fd;
4779         }
4780 }
4781
4782 sub git_blobdiff_plain {
4783         git_blobdiff('plain');
4784 }
4785
4786 sub git_commitdiff {
4787         my $format = shift || 'html';
4788         $hash ||= $hash_base || "HEAD";
4789         my %co = parse_commit($hash);
4790         if (!%co) {
4791                 die_error(undef, "Unknown commit object");
4792         }
4793
4794         # choose format for commitdiff for merge
4795         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4796                 $hash_parent = '--cc';
4797         }
4798         # we need to prepare $formats_nav before almost any parameter munging
4799         my $formats_nav;
4800         if ($format eq 'html') {
4801                 $formats_nav =
4802                         $cgi->a({-href => href(action=>"commitdiff_plain",
4803                                                hash=>$hash, hash_parent=>$hash_parent)},
4804                                 "raw");
4805
4806                 if (defined $hash_parent &&
4807                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4808                         # commitdiff with two commits given
4809                         my $hash_parent_short = $hash_parent;
4810                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4811                                 $hash_parent_short = substr($hash_parent, 0, 7);
4812                         }
4813                         $formats_nav .=
4814                                 ' (from';
4815                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4816                                 if ($co{'parents'}[$i] eq $hash_parent) {
4817                                         $formats_nav .= ' parent ' . ($i+1);
4818                                         last;
4819                                 }
4820                         }
4821                         $formats_nav .= ': ' .
4822                                 $cgi->a({-href => href(action=>"commitdiff",
4823                                                        hash=>$hash_parent)},
4824                                         esc_html($hash_parent_short)) .
4825                                 ')';
4826                 } elsif (!$co{'parent'}) {
4827                         # --root commitdiff
4828                         $formats_nav .= ' (initial)';
4829                 } elsif (scalar @{$co{'parents'}} == 1) {
4830                         # single parent commit
4831                         $formats_nav .=
4832                                 ' (parent: ' .
4833                                 $cgi->a({-href => href(action=>"commitdiff",
4834                                                        hash=>$co{'parent'})},
4835                                         esc_html(substr($co{'parent'}, 0, 7))) .
4836                                 ')';
4837                 } else {
4838                         # merge commit
4839                         if ($hash_parent eq '--cc') {
4840                                 $formats_nav .= ' | ' .
4841                                         $cgi->a({-href => href(action=>"commitdiff",
4842                                                                hash=>$hash, hash_parent=>'-c')},
4843                                                 'combined');
4844                         } else { # $hash_parent eq '-c'
4845                                 $formats_nav .= ' | ' .
4846                                         $cgi->a({-href => href(action=>"commitdiff",
4847                                                                hash=>$hash, hash_parent=>'--cc')},
4848                                                 'compact');
4849                         }
4850                         $formats_nav .=
4851                                 ' (merge: ' .
4852                                 join(' ', map {
4853                                         $cgi->a({-href => href(action=>"commitdiff",
4854                                                                hash=>$_)},
4855                                                 esc_html(substr($_, 0, 7)));
4856                                 } @{$co{'parents'}} ) .
4857                                 ')';
4858                 }
4859         }
4860
4861         my $hash_parent_param = $hash_parent;
4862         if (!defined $hash_parent_param) {
4863                 # --cc for multiple parents, --root for parentless
4864                 $hash_parent_param =
4865                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4866         }
4867
4868         # read commitdiff
4869         my $fd;
4870         my @difftree;
4871         if ($format eq 'html') {
4872                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4873                         "--no-commit-id", "--patch-with-raw", "--full-index",
4874                         $hash_parent_param, $hash, "--"
4875                         or die_error(undef, "Open git-diff-tree failed");
4876
4877                 while (my $line = <$fd>) {
4878                         chomp $line;
4879                         # empty line ends raw part of diff-tree output
4880                         last unless $line;
4881                         push @difftree, scalar parse_difftree_raw_line($line);
4882                 }
4883
4884         } elsif ($format eq 'plain') {
4885                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4886                         '-p', $hash_parent_param, $hash, "--"
4887                         or die_error(undef, "Open git-diff-tree failed");
4888
4889         } else {
4890                 die_error(undef, "Unknown commitdiff format");
4891         }
4892
4893         # non-textual hash id's can be cached
4894         my $expires;
4895         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4896                 $expires = "+1d";
4897         }
4898
4899         # write commit message
4900         if ($format eq 'html') {
4901                 my $refs = git_get_references();
4902                 my $ref = format_ref_marker($refs, $co{'id'});
4903
4904                 git_header_html(undef, $expires);
4905                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4906                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4907                 git_print_authorship(\%co);
4908                 print "<div class=\"page_body\">\n";
4909                 if (@{$co{'comment'}} > 1) {
4910                         print "<div class=\"log\">\n";
4911                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4912                         print "</div>\n"; # class="log"
4913                 }
4914
4915         } elsif ($format eq 'plain') {
4916                 my $refs = git_get_references("tags");
4917                 my $tagname = git_get_rev_name_tags($hash);
4918                 my $filename = basename($project) . "-$hash.patch";
4919
4920                 print $cgi->header(
4921                         -type => 'text/plain',
4922                         -charset => 'utf-8',
4923                         -expires => $expires,
4924                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4925                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4926                 print <<TEXT;
4927 From: $co{'author'}
4928 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4929 Subject: $co{'title'}
4930 TEXT
4931                 print "X-Git-Tag: $tagname\n" if $tagname;
4932                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4933
4934                 foreach my $line (@{$co{'comment'}}) {
4935                         print "$line\n";
4936                 }
4937                 print "---\n\n";
4938         }
4939
4940         # write patch
4941         if ($format eq 'html') {
4942                 my $use_parents = !defined $hash_parent ||
4943                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4944                 git_difftree_body(\@difftree, $hash,
4945                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4946                 print "<br/>\n";
4947
4948                 git_patchset_body($fd, \@difftree, $hash,
4949                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4950                 close $fd;
4951                 print "</div>\n"; # class="page_body"
4952                 git_footer_html();
4953
4954         } elsif ($format eq 'plain') {
4955                 local $/ = undef;
4956                 print <$fd>;
4957                 close $fd
4958                         or print "Reading git-diff-tree failed\n";
4959         }
4960 }
4961
4962 sub git_commitdiff_plain {
4963         git_commitdiff('plain');
4964 }
4965
4966 sub git_history {
4967         if (!defined $hash_base) {
4968                 $hash_base = git_get_head_hash($project);
4969         }
4970         if (!defined $page) {
4971                 $page = 0;
4972         }
4973         my $ftype;
4974         my %co = parse_commit($hash_base);
4975         if (!%co) {
4976                 die_error(undef, "Unknown commit object");
4977         }
4978
4979         my $refs = git_get_references();
4980         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4981
4982         if (!defined $hash && defined $file_name) {
4983                 $hash = git_get_hash_by_path($hash_base, $file_name);
4984         }
4985         if (defined $hash) {
4986                 $ftype = git_get_type($hash);
4987         }
4988
4989         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
4990
4991         my $paging_nav = '';
4992         if ($page > 0) {
4993                 $paging_nav .=
4994                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4995                                                file_name=>$file_name)},
4996                                 "first");
4997                 $paging_nav .= " &sdot; " .
4998                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4999                                                file_name=>$file_name, page=>$page-1),
5000                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5001         } else {
5002                 $paging_nav .= "first";
5003                 $paging_nav .= " &sdot; prev";
5004         }
5005         if ($#commitlist >= 100) {
5006                 $paging_nav .= " &sdot; " .
5007                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5008                                                file_name=>$file_name, page=>$page+1),
5009                                  -accesskey => "n", -title => "Alt-n"}, "next");
5010         } else {
5011                 $paging_nav .= " &sdot; next";
5012         }
5013         my $next_link = '';
5014         if ($#commitlist >= 100) {
5015                 $next_link =
5016                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5017                                                file_name=>$file_name, page=>$page+1),
5018                                  -accesskey => "n", -title => "Alt-n"}, "next");
5019         }
5020
5021         git_header_html();
5022         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5023         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5024         git_print_page_path($file_name, $ftype, $hash_base);
5025
5026         git_history_body(\@commitlist, 0, 99,
5027                          $refs, $hash_base, $ftype, $next_link);
5028
5029         git_footer_html();
5030 }
5031
5032 sub git_search {
5033         my ($have_search) = gitweb_check_feature('search');
5034         if (!$have_search) {
5035                 die_error('403 Permission denied', "Permission denied");
5036         }
5037         if (!defined $searchtext) {
5038                 die_error(undef, "Text field empty");
5039         }
5040         if (!defined $hash) {
5041                 $hash = git_get_head_hash($project);
5042         }
5043         my %co = parse_commit($hash);
5044         if (!%co) {
5045                 die_error(undef, "Unknown commit object");
5046         }
5047         if (!defined $page) {
5048                 $page = 0;
5049         }
5050
5051         $searchtype ||= 'commit';
5052         if ($searchtype eq 'pickaxe') {
5053                 # pickaxe may take all resources of your box and run for several minutes
5054                 # with every query - so decide by yourself how public you make this feature
5055                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5056                 if (!$have_pickaxe) {
5057                         die_error('403 Permission denied', "Permission denied");
5058                 }
5059         }
5060         if ($searchtype eq 'grep') {
5061                 my ($have_grep) = gitweb_check_feature('grep');
5062                 if (!$have_grep) {
5063                         die_error('403 Permission denied', "Permission denied");
5064                 }
5065         }
5066
5067         git_header_html();
5068
5069         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5070                 my $greptype;
5071                 if ($searchtype eq 'commit') {
5072                         $greptype = "--grep=";
5073                 } elsif ($searchtype eq 'author') {
5074                         $greptype = "--author=";
5075                 } elsif ($searchtype eq 'committer') {
5076                         $greptype = "--committer=";
5077                 }
5078                 $greptype .= $search_regexp;
5079                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5080
5081                 my $paging_nav = '';
5082                 if ($page > 0) {
5083                         $paging_nav .=
5084                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5085                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5086                                         "first");
5087                         $paging_nav .= " &sdot; " .
5088                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5089                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5090                                                        page=>$page-1),
5091                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5092                 } else {
5093                         $paging_nav .= "first";
5094                         $paging_nav .= " &sdot; prev";
5095                 }
5096                 if ($#commitlist >= 100) {
5097                         $paging_nav .= " &sdot; " .
5098                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5099                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5100                                                        page=>$page+1),
5101                                          -accesskey => "n", -title => "Alt-n"}, "next");
5102                 } else {
5103                         $paging_nav .= " &sdot; next";
5104                 }
5105                 my $next_link = '';
5106                 if ($#commitlist >= 100) {
5107                         $next_link =
5108                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5109                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5110                                                        page=>$page+1),
5111                                          -accesskey => "n", -title => "Alt-n"}, "next");
5112                 }
5113
5114                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5115                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5116                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5117         }
5118
5119         if ($searchtype eq 'pickaxe') {
5120                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5121                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5122
5123                 print "<table cellspacing=\"0\">\n";
5124                 my $alternate = 1;
5125                 $/ = "\n";
5126                 my $git_command = git_cmd_str();
5127                 my $searchqtext = $searchtext;
5128                 $searchqtext =~ s/'/'\\''/;
5129                 open my $fd, "-|", "$git_command rev-list $hash | " .
5130                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5131                 undef %co;
5132                 my @files;
5133                 while (my $line = <$fd>) {
5134                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5135                                 my %set;
5136                                 $set{'file'} = $6;
5137                                 $set{'from_id'} = $3;
5138                                 $set{'to_id'} = $4;
5139                                 $set{'id'} = $set{'to_id'};
5140                                 if ($set{'id'} =~ m/0{40}/) {
5141                                         $set{'id'} = $set{'from_id'};
5142                                 }
5143                                 if ($set{'id'} =~ m/0{40}/) {
5144                                         next;
5145                                 }
5146                                 push @files, \%set;
5147                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5148                                 if (%co) {
5149                                         if ($alternate) {
5150                                                 print "<tr class=\"dark\">\n";
5151                                         } else {
5152                                                 print "<tr class=\"light\">\n";
5153                                         }
5154                                         $alternate ^= 1;
5155                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5156                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5157                                               "<td>" .
5158                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5159                                                       -class => "list subject"},
5160                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5161                                         while (my $setref = shift @files) {
5162                                                 my %set = %$setref;
5163                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5164                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5165                                                               -class => "list"},
5166                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5167                                                       "<br/>\n";
5168                                         }
5169                                         print "</td>\n" .
5170                                               "<td class=\"link\">" .
5171                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5172                                               " | " .
5173                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5174                                         print "</td>\n" .
5175                                               "</tr>\n";
5176                                 }
5177                                 %co = parse_commit($1);
5178                         }
5179                 }
5180                 close $fd;
5181
5182                 print "</table>\n";
5183         }
5184
5185         if ($searchtype eq 'grep') {
5186                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5187                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5188
5189                 print "<table cellspacing=\"0\">\n";
5190                 my $alternate = 1;
5191                 my $matches = 0;
5192                 $/ = "\n";
5193                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5194                 my $lastfile = '';
5195                 while (my $line = <$fd>) {
5196                         chomp $line;
5197                         my ($file, $lno, $ltext, $binary);
5198                         last if ($matches++ > 1000);
5199                         if ($line =~ /^Binary file (.+) matches$/) {
5200                                 $file = $1;
5201                                 $binary = 1;
5202                         } else {
5203                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5204                         }
5205                         if ($file ne $lastfile) {
5206                                 $lastfile and print "</td></tr>\n";
5207                                 if ($alternate++) {
5208                                         print "<tr class=\"dark\">\n";
5209                                 } else {
5210                                         print "<tr class=\"light\">\n";
5211                                 }
5212                                 print "<td class=\"list\">".
5213                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5214                                                                file_name=>"$file"),
5215                                                 -class => "list"}, esc_path($file));
5216                                 print "</td><td>\n";
5217                                 $lastfile = $file;
5218                         }
5219                         if ($binary) {
5220                                 print "<div class=\"binary\">Binary file</div>\n";
5221                         } else {
5222                                 $ltext = untabify($ltext);
5223                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5224                                         $ltext = esc_html($1, -nbsp=>1);
5225                                         $ltext .= '<span class="match">';
5226                                         $ltext .= esc_html($2, -nbsp=>1);
5227                                         $ltext .= '</span>';
5228                                         $ltext .= esc_html($3, -nbsp=>1);
5229                                 } else {
5230                                         $ltext = esc_html($ltext, -nbsp=>1);
5231                                 }
5232                                 print "<div class=\"pre\">" .
5233                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5234                                                                file_name=>"$file").'#l'.$lno,
5235                                                 -class => "linenr"}, sprintf('%4i', $lno))
5236                                         . ' ' .  $ltext . "</div>\n";
5237                         }
5238                 }
5239                 if ($lastfile) {
5240                         print "</td></tr>\n";
5241                         if ($matches > 1000) {
5242                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5243                         }
5244                 } else {
5245                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5246                 }
5247                 close $fd;
5248
5249                 print "</table>\n";
5250         }
5251         git_footer_html();
5252 }
5253
5254 sub git_search_help {
5255         git_header_html();
5256         git_print_page_nav('','', $hash,$hash,$hash);
5257         print <<EOT;
5258 <dl>
5259 <dt><b>commit</b></dt>
5260 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5261 EOT
5262         my ($have_grep) = gitweb_check_feature('grep');
5263         if ($have_grep) {
5264                 print <<EOT;
5265 <dt><b>grep</b></dt>
5266 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5267     a different one) are searched for the given
5268 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5269 (POSIX extended) and the matches are listed. On large
5270 trees, this search can take a while and put some strain on the server, so please use it with
5271 some consideration.</dd>
5272 EOT
5273         }
5274         print <<EOT;
5275 <dt><b>author</b></dt>
5276 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5277 <dt><b>committer</b></dt>
5278 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5279 EOT
5280         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5281         if ($have_pickaxe) {
5282                 print <<EOT;
5283 <dt><b>pickaxe</b></dt>
5284 <dd>All commits that caused the string to appear or disappear from any file (changes that
5285 added, removed or "modified" the string) will be listed. This search can take a while and
5286 takes a lot of strain on the server, so please use it wisely.</dd>
5287 EOT
5288         }
5289         print "</dl>\n";
5290         git_footer_html();
5291 }
5292
5293 sub git_shortlog {
5294         my $head = git_get_head_hash($project);
5295         if (!defined $hash) {
5296                 $hash = $head;
5297         }
5298         if (!defined $page) {
5299                 $page = 0;
5300         }
5301         my $refs = git_get_references();
5302
5303         my @commitlist = parse_commits($hash, 101, (100 * $page));
5304
5305         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5306         my $next_link = '';
5307         if ($#commitlist >= 100) {
5308                 $next_link =
5309                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5310                                  -accesskey => "n", -title => "Alt-n"}, "next");
5311         }
5312
5313         git_header_html();
5314         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5315         git_print_header_div('summary', $project);
5316
5317         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5318
5319         git_footer_html();
5320 }
5321
5322 ## ......................................................................
5323 ## feeds (RSS, Atom; OPML)
5324
5325 sub git_feed {
5326         my $format = shift || 'atom';
5327         my ($have_blame) = gitweb_check_feature('blame');
5328
5329         # Atom: http://www.atomenabled.org/developers/syndication/
5330         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5331         if ($format ne 'rss' && $format ne 'atom') {
5332                 die_error(undef, "Unknown web feed format");
5333         }
5334
5335         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5336         my $head = $hash || 'HEAD';
5337         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5338
5339         my %latest_commit;
5340         my %latest_date;
5341         my $content_type = "application/$format+xml";
5342         if (defined $cgi->http('HTTP_ACCEPT') &&
5343                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5344                 # browser (feed reader) prefers text/xml
5345                 $content_type = 'text/xml';
5346         }
5347         if (defined($commitlist[0])) {
5348                 %latest_commit = %{$commitlist[0]};
5349                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5350                 print $cgi->header(
5351                         -type => $content_type,
5352                         -charset => 'utf-8',
5353                         -last_modified => $latest_date{'rfc2822'});
5354         } else {
5355                 print $cgi->header(
5356                         -type => $content_type,
5357                         -charset => 'utf-8');
5358         }
5359
5360         # Optimization: skip generating the body if client asks only
5361         # for Last-Modified date.
5362         return if ($cgi->request_method() eq 'HEAD');
5363
5364         # header variables
5365         my $title = "$site_name - $project/$action";
5366         my $feed_type = 'log';
5367         if (defined $hash) {
5368                 $title .= " - '$hash'";
5369                 $feed_type = 'branch log';
5370                 if (defined $file_name) {
5371                         $title .= " :: $file_name";
5372                         $feed_type = 'history';
5373                 }
5374         } elsif (defined $file_name) {
5375                 $title .= " - $file_name";
5376                 $feed_type = 'history';
5377         }
5378         $title .= " $feed_type";
5379         my $descr = git_get_project_description($project);
5380         if (defined $descr) {
5381                 $descr = esc_html($descr);
5382         } else {
5383                 $descr = "$project " .
5384                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5385                          " feed";
5386         }
5387         my $owner = git_get_project_owner($project);
5388         $owner = esc_html($owner);
5389
5390         #header
5391         my $alt_url;
5392         if (defined $file_name) {
5393                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5394         } elsif (defined $hash) {
5395                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5396         } else {
5397                 $alt_url = href(-full=>1, action=>"summary");
5398         }
5399         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5400         if ($format eq 'rss') {
5401                 print <<XML;
5402 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5403 <channel>
5404 XML
5405                 print "<title>$title</title>\n" .
5406                       "<link>$alt_url</link>\n" .
5407                       "<description>$descr</description>\n" .
5408                       "<language>en</language>\n";
5409         } elsif ($format eq 'atom') {
5410                 print <<XML;
5411 <feed xmlns="http://www.w3.org/2005/Atom">
5412 XML
5413                 print "<title>$title</title>\n" .
5414                       "<subtitle>$descr</subtitle>\n" .
5415                       '<link rel="alternate" type="text/html" href="' .
5416                       $alt_url . '" />' . "\n" .
5417                       '<link rel="self" type="' . $content_type . '" href="' .
5418                       $cgi->self_url() . '" />' . "\n" .
5419                       "<id>" . href(-full=>1) . "</id>\n" .
5420                       # use project owner for feed author
5421                       "<author><name>$owner</name></author>\n";
5422                 if (defined $favicon) {
5423                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5424                 }
5425                 if (defined $logo_url) {
5426                         # not twice as wide as tall: 72 x 27 pixels
5427                         print "<logo>" . esc_url($logo) . "</logo>\n";
5428                 }
5429                 if (! %latest_date) {
5430                         # dummy date to keep the feed valid until commits trickle in:
5431                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5432                 } else {
5433                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5434                 }
5435         }
5436
5437         # contents
5438         for (my $i = 0; $i <= $#commitlist; $i++) {
5439                 my %co = %{$commitlist[$i]};
5440                 my $commit = $co{'id'};
5441                 # we read 150, we always show 30 and the ones more recent than 48 hours
5442                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5443                         last;
5444                 }
5445                 my %cd = parse_date($co{'author_epoch'});
5446
5447                 # get list of changed files
5448                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5449                         $co{'parent'} || "--root",
5450                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5451                         or next;
5452                 my @difftree = map { chomp; $_ } <$fd>;
5453                 close $fd
5454                         or next;
5455
5456                 # print element (entry, item)
5457                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5458                 if ($format eq 'rss') {
5459                         print "<item>\n" .
5460                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5461                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5462                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5463                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5464                               "<link>$co_url</link>\n" .
5465                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5466                               "<content:encoded>" .
5467                               "<![CDATA[\n";
5468                 } elsif ($format eq 'atom') {
5469                         print "<entry>\n" .
5470                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5471                               "<updated>$cd{'iso-8601'}</updated>\n" .
5472                               "<author>\n" .
5473                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5474                         if ($co{'author_email'}) {
5475                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5476                         }
5477                         print "</author>\n" .
5478                               # use committer for contributor
5479                               "<contributor>\n" .
5480                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5481                         if ($co{'committer_email'}) {
5482                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5483                         }
5484                         print "</contributor>\n" .
5485                               "<published>$cd{'iso-8601'}</published>\n" .
5486                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5487                               "<id>$co_url</id>\n" .
5488                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5489                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5490                 }
5491                 my $comment = $co{'comment'};
5492                 print "<pre>\n";
5493                 foreach my $line (@$comment) {
5494                         $line = esc_html($line);
5495                         print "$line\n";
5496                 }
5497                 print "</pre><ul>\n";
5498                 foreach my $difftree_line (@difftree) {
5499                         my %difftree = parse_difftree_raw_line($difftree_line);
5500                         next if !$difftree{'from_id'};
5501
5502                         my $file = $difftree{'file'} || $difftree{'to_file'};
5503
5504                         print "<li>" .
5505                               "[" .
5506                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5507                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5508                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5509                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5510                                       -title => "diff"}, 'D');
5511                         if ($have_blame) {
5512                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5513                                                              file_name=>$file, hash_base=>$commit),
5514                                               -title => "blame"}, 'B');
5515                         }
5516                         # if this is not a feed of a file history
5517                         if (!defined $file_name || $file_name ne $file) {
5518                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5519                                                              file_name=>$file, hash=>$commit),
5520                                               -title => "history"}, 'H');
5521                         }
5522                         $file = esc_path($file);
5523                         print "] ".
5524                               "$file</li>\n";
5525                 }
5526                 if ($format eq 'rss') {
5527                         print "</ul>]]>\n" .
5528                               "</content:encoded>\n" .
5529                               "</item>\n";
5530                 } elsif ($format eq 'atom') {
5531                         print "</ul>\n</div>\n" .
5532                               "</content>\n" .
5533                               "</entry>\n";
5534                 }
5535         }
5536
5537         # end of feed
5538         if ($format eq 'rss') {
5539                 print "</channel>\n</rss>\n";
5540         }       elsif ($format eq 'atom') {
5541                 print "</feed>\n";
5542         }
5543 }
5544
5545 sub git_rss {
5546         git_feed('rss');
5547 }
5548
5549 sub git_atom {
5550         git_feed('atom');
5551 }
5552
5553 sub git_opml {
5554         my @list = git_get_projects_list();
5555
5556         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5557         print <<XML;
5558 <?xml version="1.0" encoding="utf-8"?>
5559 <opml version="1.0">
5560 <head>
5561   <title>$site_name OPML Export</title>
5562 </head>
5563 <body>
5564 <outline text="git RSS feeds">
5565 XML
5566
5567         foreach my $pr (@list) {
5568                 my %proj = %$pr;
5569                 my $head = git_get_head_hash($proj{'path'});
5570                 if (!defined $head) {
5571                         next;
5572                 }
5573                 $git_dir = "$projectroot/$proj{'path'}";
5574                 my %co = parse_commit($head);
5575                 if (!%co) {
5576                         next;
5577                 }
5578
5579                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5580                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5581                 my $html = "$my_url?p=$proj{'path'};a=summary";
5582                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5583         }
5584         print <<XML;
5585 </outline>
5586 </body>
5587 </opml>
5588 XML
5589 }