Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64
  65 # URI of GIT logo (72x27 size)
  66 our $logo = "++GITWEB_LOGO++";
  67 # URI of GIT favicon, assumed to be image/png type
  68 our $favicon = "++GITWEB_FAVICON++";
  69
  70 # URI and label (title) of GIT logo link
  71 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  72 #our $logo_label = "git documentation";
  73 our $logo_url = "http://git.or.cz/";
  74 our $logo_label = "git homepage";
  75
  76 # source of projects list
  77 our $projects_list = "++GITWEB_LIST++";
  78
  79 # the width (in characters) of the projects list "Description" column
  80 our $projects_list_description_width = 25;
  81
  82 # default order of projects list
  83 # valid values are none, project, descr, owner, and age
  84 our $default_projects_order = "project";
  85
  86 # show repository only if this file exists
  87 # (only effective if this variable evaluates to true)
  88 our $export_ok = "++GITWEB_EXPORT_OK++";
  89
  90 # only allow viewing of repositories also shown on the overview page
  91 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  92
  93 # list of git base URLs used for URL to where fetch project from,
  94 # i.e. full URL is "$git_base_url/$project"
  95 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  96
  97 # default blob_plain mimetype and default charset for text/plain blob
  98 our $default_blob_plain_mimetype = 'text/plain';
  99 our $default_text_plain_charset  = undef;
 100
 101 # file to use for guessing MIME types before trying /etc/mime.types
 102 # (relative to the current git repository)
 103 our $mimetypes_file = undef;
 104
 105 # assume this charset if line contains non-UTF-8 characters;
 106 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 107 # for which encoding all byte sequences are valid, for example
 108 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 109 # could be even 'utf-8' for the old behavior)
 110 our $fallback_encoding = 'latin1';
 111
 112 # rename detection options for git-diff and git-diff-tree
 113 # - default is '-M', with the cost proportional to
 114 #   (number of removed files) * (number of new files).
 115 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 116 #   (number of changed files + number of removed files) * (number of new files)
 117 # - even more costly is '-C', '--find-copies-harder' with cost
 118 #   (number of files in the original tree) * (number of new files)
 119 # - one might want to include '-B' option, e.g. '-B', '-M'
 120 our @diff_opts = ('-M'); # taken from git_commit
 121
 122 # information about snapshot formats that gitweb is capable of serving
 123 our %known_snapshot_formats = (
 124         # name => {
 125         #       'display' => display name,
 126         #       'type' => mime type,
 127         #       'suffix' => filename suffix,
 128         #       'format' => --format for git-archive,
 129         #       'compressor' => [compressor command and arguments]
 130         #                       (array reference, optional)}
 131         #
 132         'tgz' => {
 133                 'display' => 'tar.gz',
 134                 'type' => 'application/x-gzip',
 135                 'suffix' => '.tar.gz',
 136                 'format' => 'tar',
 137                 'compressor' => ['gzip']},
 138
 139         'tbz2' => {
 140                 'display' => 'tar.bz2',
 141                 'type' => 'application/x-bzip2',
 142                 'suffix' => '.tar.bz2',
 143                 'format' => 'tar',
 144                 'compressor' => ['bzip2']},
 145
 146         'zip' => {
 147                 'display' => 'zip',
 148                 'type' => 'application/x-zip',
 149                 'suffix' => '.zip',
 150                 'format' => 'zip'},
 151 );
 152
 153 # Aliases so we understand old gitweb.snapshot values in repository
 154 # configuration.
 155 our %known_snapshot_format_aliases = (
 156         'gzip'  => 'tgz',
 157         'bzip2' => 'tbz2',
 158
 159         # backward compatibility: legacy gitweb config support
 160         'x-gzip' => undef, 'gz' => undef,
 161         'x-bzip2' => undef, 'bz2' => undef,
 162         'x-zip' => undef, '' => undef,
 163 );
 164
 165 # You define site-wide feature defaults here; override them with
 166 # $GITWEB_CONFIG as necessary.
 167 our %feature = (
 168         # feature => {
 169         #       'sub' => feature-sub (subroutine),
 170         #       'override' => allow-override (boolean),
 171         #       'default' => [ default options...] (array reference)}
 172         #
 173         # if feature is overridable (it means that allow-override has true value),
 174         # then feature-sub will be called with default options as parameters;
 175         # return value of feature-sub indicates if to enable specified feature
 176         #
 177         # if there is no 'sub' key (no feature-sub), then feature cannot be
 178         # overriden
 179         #
 180         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 181
 182         # Enable the 'blame' blob view, showing the last commit that modified
 183         # each line in the file. This can be very CPU-intensive.
 184
 185         # To enable system wide have in $GITWEB_CONFIG
 186         # $feature{'blame'}{'default'} = [1];
 187         # To have project specific config enable override in $GITWEB_CONFIG
 188         # $feature{'blame'}{'override'} = 1;
 189         # and in project config gitweb.blame = 0|1;
 190         'blame' => {
 191                 'sub' => \&feature_blame,
 192                 'override' => 0,
 193                 'default' => [0]},
 194
 195         # Enable the 'snapshot' link, providing a compressed archive of any
 196         # tree. This can potentially generate high traffic if you have large
 197         # project.
 198
 199         # Value is a list of formats defined in %known_snapshot_formats that
 200         # you wish to offer.
 201         # To disable system wide have in $GITWEB_CONFIG
 202         # $feature{'snapshot'}{'default'} = [];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'snapshot'}{'override'} = 1;
 205         # and in project config, a comma-separated list of formats or "none"
 206         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 207         'snapshot' => {
 208                 'sub' => \&feature_snapshot,
 209                 'override' => 0,
 210                 'default' => ['tgz']},
 211
 212         # Enable text search, which will list the commits which match author,
 213         # committer or commit text to a given string.  Enabled by default.
 214         # Project specific override is not supported.
 215         'search' => {
 216                 'override' => 0,
 217                 'default' => [1]},
 218
 219         # Enable grep search, which will list the files in currently selected
 220         # tree containing the given string. Enabled by default. This can be
 221         # potentially CPU-intensive, of course.
 222
 223         # To enable system wide have in $GITWEB_CONFIG
 224         # $feature{'grep'}{'default'} = [1];
 225         # To have project specific config enable override in $GITWEB_CONFIG
 226         # $feature{'grep'}{'override'} = 1;
 227         # and in project config gitweb.grep = 0|1;
 228         'grep' => {
 229                 'override' => 0,
 230                 'default' => [1]},
 231
 232         # Enable the pickaxe search, which will list the commits that modified
 233         # a given string in a file. This can be practical and quite faster
 234         # alternative to 'blame', but still potentially CPU-intensive.
 235
 236         # To enable system wide have in $GITWEB_CONFIG
 237         # $feature{'pickaxe'}{'default'} = [1];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'pickaxe'}{'override'} = 1;
 240         # and in project config gitweb.pickaxe = 0|1;
 241         'pickaxe' => {
 242                 'sub' => \&feature_pickaxe,
 243                 'override' => 0,
 244                 'default' => [1]},
 245
 246         # Make gitweb use an alternative format of the URLs which can be
 247         # more readable and natural-looking: project name is embedded
 248         # directly in the path and the query string contains other
 249         # auxiliary information. All gitweb installations recognize
 250         # URL in either format; this configures in which formats gitweb
 251         # generates links.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pathinfo'}{'default'} = [1];
 255         # Project specific override is not supported.
 256
 257         # Note that you will need to change the default location of CSS,
 258         # favicon, logo and possibly other files to an absolute URL. Also,
 259         # if gitweb.cgi serves as your indexfile, you will need to force
 260         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 261         'pathinfo' => {
 262                 'override' => 0,
 263                 'default' => [0]},
 264
 265         # Make gitweb consider projects in project root subdirectories
 266         # to be forks of existing projects. Given project $projname.git,
 267         # projects matching $projname/*.git will not be shown in the main
 268         # projects list, instead a '+' mark will be added to $projname
 269         # there and a 'forks' view will be enabled for the project, listing
 270         # all the forks. If project list is taken from a file, forks have
 271         # to be listed after the main project.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'forks'}{'default'} = [1];
 275         # Project specific override is not supported.
 276         'forks' => {
 277                 'override' => 0,
 278                 'default' => [0]},
 279 );
 280
 281 sub gitweb_check_feature {
 282         my ($name) = @_;
 283         return unless exists $feature{$name};
 284         my ($sub, $override, @defaults) = (
 285                 $feature{$name}{'sub'},
 286                 $feature{$name}{'override'},
 287                 @{$feature{$name}{'default'}});
 288         if (!$override) { return @defaults; }
 289         if (!defined $sub) {
 290                 warn "feature $name is not overrideable";
 291                 return @defaults;
 292         }
 293         return $sub->(@defaults);
 294 }
 295
 296 sub feature_blame {
 297         my ($val) = git_get_project_config('blame', '--bool');
 298
 299         if ($val eq 'true') {
 300                 return 1;
 301         } elsif ($val eq 'false') {
 302                 return 0;
 303         }
 304
 305         return $_[0];
 306 }
 307
 308 sub feature_snapshot {
 309         my (@fmts) = @_;
 310
 311         my ($val) = git_get_project_config('snapshot');
 312
 313         if ($val) {
 314                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 # process alternate names for backward compatibility
 361 # filter out unsupported (unknown) snapshot formats
 362 sub filter_snapshot_fmts {
 363         my @fmts = @_;
 364
 365         @fmts = map {
 366                 exists $known_snapshot_format_aliases{$_} ?
 367                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 368         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 369
 370 }
 371
 372 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 373 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 374
 375 # version of the core git binary
 376 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 377
 378 $projects_list ||= $projectroot;
 379
 380 # ======================================================================
 381 # input validation and dispatch
 382 our $action = $cgi->param('a');
 383 if (defined $action) {
 384         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 385                 die_error(undef, "Invalid action parameter");
 386         }
 387 }
 388
 389 # parameters which are pathnames
 390 our $project = $cgi->param('p');
 391 if (defined $project) {
 392         if (!validate_pathname($project) ||
 393             !(-d "$projectroot/$project") ||
 394             !check_head_link("$projectroot/$project") ||
 395             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 396             ($strict_export && !project_in_list($project))) {
 397                 undef $project;
 398                 die_error(undef, "No such project");
 399         }
 400 }
 401
 402 our $file_name = $cgi->param('f');
 403 if (defined $file_name) {
 404         if (!validate_pathname($file_name)) {
 405                 die_error(undef, "Invalid file parameter");
 406         }
 407 }
 408
 409 our $file_parent = $cgi->param('fp');
 410 if (defined $file_parent) {
 411         if (!validate_pathname($file_parent)) {
 412                 die_error(undef, "Invalid file parent parameter");
 413         }
 414 }
 415
 416 # parameters which are refnames
 417 our $hash = $cgi->param('h');
 418 if (defined $hash) {
 419         if (!validate_refname($hash)) {
 420                 die_error(undef, "Invalid hash parameter");
 421         }
 422 }
 423
 424 our $hash_parent = $cgi->param('hp');
 425 if (defined $hash_parent) {
 426         if (!validate_refname($hash_parent)) {
 427                 die_error(undef, "Invalid hash parent parameter");
 428         }
 429 }
 430
 431 our $hash_base = $cgi->param('hb');
 432 if (defined $hash_base) {
 433         if (!validate_refname($hash_base)) {
 434                 die_error(undef, "Invalid hash base parameter");
 435         }
 436 }
 437
 438 my %allowed_options = (
 439         "--no-merges" => [ qw(rss atom log shortlog history) ],
 440 );
 441
 442 our @extra_options = $cgi->param('opt');
 443 if (defined @extra_options) {
 444         foreach my $opt (@extra_options) {
 445                 if (not exists $allowed_options{$opt}) {
 446                         die_error(undef, "Invalid option parameter");
 447                 }
 448                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 449                         die_error(undef, "Invalid option parameter for this action");
 450                 }
 451         }
 452 }
 453
 454 our $hash_parent_base = $cgi->param('hpb');
 455 if (defined $hash_parent_base) {
 456         if (!validate_refname($hash_parent_base)) {
 457                 die_error(undef, "Invalid hash parent base parameter");
 458         }
 459 }
 460
 461 # other parameters
 462 our $page = $cgi->param('pg');
 463 if (defined $page) {
 464         if ($page =~ m/[^0-9]/) {
 465                 die_error(undef, "Invalid page parameter");
 466         }
 467 }
 468
 469 our $searchtype = $cgi->param('st');
 470 if (defined $searchtype) {
 471         if ($searchtype =~ m/[^a-z]/) {
 472                 die_error(undef, "Invalid searchtype parameter");
 473         }
 474 }
 475
 476 our $searchtext = $cgi->param('s');
 477 our $search_regexp;
 478 if (defined $searchtext) {
 479         if (length($searchtext) < 2) {
 480                 die_error(undef, "At least two characters are required for search parameter");
 481         }
 482         $search_regexp = quotemeta $searchtext;
 483 }
 484
 485 # now read PATH_INFO and use it as alternative to parameters
 486 sub evaluate_path_info {
 487         return if defined $project;
 488         my $path_info = $ENV{"PATH_INFO"};
 489         return if !$path_info;
 490         $path_info =~ s,^/+,,;
 491         return if !$path_info;
 492         # find which part of PATH_INFO is project
 493         $project = $path_info;
 494         $project =~ s,/+$,,;
 495         while ($project && !check_head_link("$projectroot/$project")) {
 496                 $project =~ s,/*[^/]*$,,;
 497         }
 498         # validate project
 499         $project = validate_pathname($project);
 500         if (!$project ||
 501             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 502             ($strict_export && !project_in_list($project))) {
 503                 undef $project;
 504                 return;
 505         }
 506         # do not change any parameters if an action is given using the query string
 507         return if $action;
 508         $path_info =~ s,^$project/*,,;
 509         my ($refname, $pathname) = split(/:/, $path_info, 2);
 510         if (defined $pathname) {
 511                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 512                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 513                 $pathname =~ s,^/+,,;
 514                 if (!$pathname || substr($pathname, -1) eq "/") {
 515                         $action  ||= "tree";
 516                         $pathname =~ s,/$,,;
 517                 } else {
 518                         $action  ||= "blob_plain";
 519                 }
 520                 $hash_base ||= validate_refname($refname);
 521                 $file_name ||= validate_pathname($pathname);
 522         } elsif (defined $refname) {
 523                 # we got "project.git/branch"
 524                 $action ||= "shortlog";
 525                 $hash   ||= validate_refname($refname);
 526         }
 527 }
 528 evaluate_path_info();
 529
 530 # path to the current git repository
 531 our $git_dir;
 532 $git_dir = "$projectroot/$project" if $project;
 533
 534 # dispatch
 535 my %actions = (
 536         "blame" => \&git_blame2,
 537         "blobdiff" => \&git_blobdiff,
 538         "blobdiff_plain" => \&git_blobdiff_plain,
 539         "blob" => \&git_blob,
 540         "blob_plain" => \&git_blob_plain,
 541         "commitdiff" => \&git_commitdiff,
 542         "commitdiff_plain" => \&git_commitdiff_plain,
 543         "commit" => \&git_commit,
 544         "forks" => \&git_forks,
 545         "heads" => \&git_heads,
 546         "history" => \&git_history,
 547         "log" => \&git_log,
 548         "rss" => \&git_rss,
 549         "atom" => \&git_atom,
 550         "search" => \&git_search,
 551         "search_help" => \&git_search_help,
 552         "shortlog" => \&git_shortlog,
 553         "summary" => \&git_summary,
 554         "tag" => \&git_tag,
 555         "tags" => \&git_tags,
 556         "tree" => \&git_tree,
 557         "snapshot" => \&git_snapshot,
 558         "object" => \&git_object,
 559         # those below don't need $project
 560         "opml" => \&git_opml,
 561         "project_list" => \&git_project_list,
 562         "project_index" => \&git_project_index,
 563 );
 564
 565 if (!defined $action) {
 566         if (defined $hash) {
 567                 $action = git_get_type($hash);
 568         } elsif (defined $hash_base && defined $file_name) {
 569                 $action = git_get_type("$hash_base:$file_name");
 570         } elsif (defined $project) {
 571                 $action = 'summary';
 572         } else {
 573                 $action = 'project_list';
 574         }
 575 }
 576 if (!defined($actions{$action})) {
 577         die_error(undef, "Unknown action");
 578 }
 579 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 580     !$project) {
 581         die_error(undef, "Project needed");
 582 }
 583 $actions{$action}->();
 584 exit;
 585
 586 ## ======================================================================
 587 ## action links
 588
 589 sub href(%) {
 590         my %params = @_;
 591         # default is to use -absolute url() i.e. $my_uri
 592         my $href = $params{-full} ? $my_url : $my_uri;
 593
 594         # XXX: Warning: If you touch this, check the search form for updating,
 595         # too.
 596
 597         my @mapping = (
 598                 project => "p",
 599                 action => "a",
 600                 file_name => "f",
 601                 file_parent => "fp",
 602                 hash => "h",
 603                 hash_parent => "hp",
 604                 hash_base => "hb",
 605                 hash_parent_base => "hpb",
 606                 page => "pg",
 607                 order => "o",
 608                 searchtext => "s",
 609                 searchtype => "st",
 610                 snapshot_format => "sf",
 611                 extra_options => "opt",
 612         );
 613         my %mapping = @mapping;
 614
 615         if ($params{-replay}) {
 616                 while (my ($name, $symbol) = each %mapping) {
 617                         if (!exists $params{$name}) {
 618                                 # to allow for multivalued params we use arrayref form
 619                                 $params{$name} = [ $cgi->param($symbol) ];
 620                         }
 621                 }
 622         }
 623
 624         $params{'project'} = $project unless exists $params{'project'};
 625
 626         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 627         if ($use_pathinfo) {
 628                 # use PATH_INFO for project name
 629                 $href .= "/$params{'project'}" if defined $params{'project'};
 630                 delete $params{'project'};
 631
 632                 # Summary just uses the project path URL
 633                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 634                         delete $params{'action'};
 635                 }
 636         }
 637
 638         # now encode the parameters explicitly
 639         my @result = ();
 640         for (my $i = 0; $i < @mapping; $i += 2) {
 641                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 642                 if (defined $params{$name}) {
 643                         if (ref($params{$name}) eq "ARRAY") {
 644                                 foreach my $par (@{$params{$name}}) {
 645                                         push @result, $symbol . "=" . esc_param($par);
 646                                 }
 647                         } else {
 648                                 push @result, $symbol . "=" . esc_param($params{$name});
 649                         }
 650                 }
 651         }
 652         $href .= "?" . join(';', @result) if scalar @result;
 653
 654         return $href;
 655 }
 656
 657
 658 ## ======================================================================
 659 ## validation, quoting/unquoting and escaping
 660
 661 sub validate_pathname {
 662         my $input = shift || return undef;
 663
 664         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 665         # at the beginning, at the end, and between slashes.
 666         # also this catches doubled slashes
 667         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 668                 return undef;
 669         }
 670         # no null characters
 671         if ($input =~ m!\0!) {
 672                 return undef;
 673         }
 674         return $input;
 675 }
 676
 677 sub validate_refname {
 678         my $input = shift || return undef;
 679
 680         # textual hashes are O.K.
 681         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 682                 return $input;
 683         }
 684         # it must be correct pathname
 685         $input = validate_pathname($input)
 686                 or return undef;
 687         # restrictions on ref name according to git-check-ref-format
 688         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 689                 return undef;
 690         }
 691         return $input;
 692 }
 693
 694 # decode sequences of octets in utf8 into Perl's internal form,
 695 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 696 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 697 sub to_utf8 {
 698         my $str = shift;
 699         my $res;
 700         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 701         if (defined $res) {
 702                 return $res;
 703         } else {
 704                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 705         }
 706 }
 707
 708 # quote unsafe chars, but keep the slash, even when it's not
 709 # correct, but quoted slashes look too horrible in bookmarks
 710 sub esc_param {
 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 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 719 sub esc_url {
 720         my $str = shift;
 721         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 722         $str =~ s/\+/%2B/g;
 723         $str =~ s/ /\+/g;
 724         return $str;
 725 }
 726
 727 # replace invalid utf8 character with SUBSTITUTION sequence
 728 sub esc_html ($;%) {
 729         my $str = shift;
 730         my %opts = @_;
 731
 732         $str = to_utf8($str);
 733         $str = $cgi->escapeHTML($str);
 734         if ($opts{'-nbsp'}) {
 735                 $str =~ s/ /&nbsp;/g;
 736         }
 737         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 738         return $str;
 739 }
 740
 741 # quote control characters and escape filename to HTML
 742 sub esc_path {
 743         my $str = shift;
 744         my %opts = @_;
 745
 746         $str = to_utf8($str);
 747         $str = $cgi->escapeHTML($str);
 748         if ($opts{'-nbsp'}) {
 749                 $str =~ s/ /&nbsp;/g;
 750         }
 751         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 752         return $str;
 753 }
 754
 755 # Make control characters "printable", using character escape codes (CEC)
 756 sub quot_cec {
 757         my $cntrl = shift;
 758         my %es = ( # character escape codes, aka escape sequences
 759                    "\t" => '\t',   # tab            (HT)
 760                    "\n" => '\n',   # line feed      (LF)
 761                    "\r" => '\r',   # carrige return (CR)
 762                    "\f" => '\f',   # form feed      (FF)
 763                    "\b" => '\b',   # backspace      (BS)
 764                    "\a" => '\a',   # alarm (bell)   (BEL)
 765                    "\e" => '\e',   # escape         (ESC)
 766                    "\013" => '\v', # vertical tab   (VT)
 767                    "\000" => '\0', # nul character  (NUL)
 768                    );
 769         my $chr = ( (exists $es{$cntrl})
 770                     ? $es{$cntrl}
 771                     : sprintf('\%03o', ord($cntrl)) );
 772         return "<span class=\"cntrl\">$chr</span>";
 773 }
 774
 775 # Alternatively use unicode control pictures codepoints,
 776 # Unicode "printable representation" (PR)
 777 sub quot_upr {
 778         my $cntrl = shift;
 779         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 780         return "<span class=\"cntrl\">$chr</span>";
 781 }
 782
 783 # git may return quoted and escaped filenames
 784 sub unquote {
 785         my $str = shift;
 786
 787         sub unq {
 788                 my $seq = shift;
 789                 my %es = ( # character escape codes, aka escape sequences
 790                         't' => "\t",   # tab            (HT, TAB)
 791                         'n' => "\n",   # newline        (NL)
 792                         'r' => "\r",   # return         (CR)
 793                         'f' => "\f",   # form feed      (FF)
 794                         'b' => "\b",   # backspace      (BS)
 795                         'a' => "\a",   # alarm (bell)   (BEL)
 796                         'e' => "\e",   # escape         (ESC)
 797                         'v' => "\013", # vertical tab   (VT)
 798                 );
 799
 800                 if ($seq =~ m/^[0-7]{1,3}$/) {
 801                         # octal char sequence
 802                         return chr(oct($seq));
 803                 } elsif (exists $es{$seq}) {
 804                         # C escape sequence, aka character escape code
 805                         return $es{$seq}
 806                 }
 807                 # quoted ordinary character
 808                 return $seq;
 809         }
 810
 811         if ($str =~ m/^"(.*)"$/) {
 812                 # needs unquoting
 813                 $str = $1;
 814                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 815         }
 816         return $str;
 817 }
 818
 819 # escape tabs (convert tabs to spaces)
 820 sub untabify {
 821         my $line = shift;
 822
 823         while ((my $pos = index($line, "\t")) != -1) {
 824                 if (my $count = (8 - ($pos % 8))) {
 825                         my $spaces = ' ' x $count;
 826                         $line =~ s/\t/$spaces/;
 827                 }
 828         }
 829
 830         return $line;
 831 }
 832
 833 sub project_in_list {
 834         my $project = shift;
 835         my @list = git_get_projects_list();
 836         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 837 }
 838
 839 ## ----------------------------------------------------------------------
 840 ## HTML aware string manipulation
 841
 842 sub chop_str {
 843         my $str = shift;
 844         my $len = shift;
 845         my $add_len = shift || 10;
 846
 847         # allow only $len chars, but don't cut a word if it would fit in $add_len
 848         # if it doesn't fit, cut it if it's still longer than the dots we would add
 849         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 850         my $body = $1;
 851         my $tail = $2;
 852         if (length($tail) > 4) {
 853                 $tail = " ...";
 854                 $body =~ s/&[^;]*$//; # remove chopped character entities
 855         }
 856         return "$body$tail";
 857 }
 858
 859 # takes the same arguments as chop_str, but also wraps a <span> around the
 860 # result with a title attribute if it does get chopped. Additionally, the
 861 # string is HTML-escaped.
 862 sub chop_and_escape_str {
 863         my $str = shift;
 864         my $len = shift;
 865         my $add_len = shift || 10;
 866
 867         my $chopped = chop_str($str, $len, $add_len);
 868         if ($chopped eq $str) {
 869                 return esc_html($chopped);
 870         } else {
 871                 return qq{<span title="} . esc_html($str) . qq{">} .
 872                         esc_html($chopped) . qq{</span>};
 873         }
 874 }
 875
 876 ## ----------------------------------------------------------------------
 877 ## functions returning short strings
 878
 879 # CSS class for given age value (in seconds)
 880 sub age_class {
 881         my $age = shift;
 882
 883         if (!defined $age) {
 884                 return "noage";
 885         } elsif ($age < 60*60*2) {
 886                 return "age0";
 887         } elsif ($age < 60*60*24*2) {
 888                 return "age1";
 889         } else {
 890                 return "age2";
 891         }
 892 }
 893
 894 # convert age in seconds to "nn units ago" string
 895 sub age_string {
 896         my $age = shift;
 897         my $age_str;
 898
 899         if ($age > 60*60*24*365*2) {
 900                 $age_str = (int $age/60/60/24/365);
 901                 $age_str .= " years ago";
 902         } elsif ($age > 60*60*24*(365/12)*2) {
 903                 $age_str = int $age/60/60/24/(365/12);
 904                 $age_str .= " months ago";
 905         } elsif ($age > 60*60*24*7*2) {
 906                 $age_str = int $age/60/60/24/7;
 907                 $age_str .= " weeks ago";
 908         } elsif ($age > 60*60*24*2) {
 909                 $age_str = int $age/60/60/24;
 910                 $age_str .= " days ago";
 911         } elsif ($age > 60*60*2) {
 912                 $age_str = int $age/60/60;
 913                 $age_str .= " hours ago";
 914         } elsif ($age > 60*2) {
 915                 $age_str = int $age/60;
 916                 $age_str .= " min ago";
 917         } elsif ($age > 2) {
 918                 $age_str = int $age;
 919                 $age_str .= " sec ago";
 920         } else {
 921                 $age_str .= " right now";
 922         }
 923         return $age_str;
 924 }
 925
 926 use constant {
 927         S_IFINVALID => 0030000,
 928         S_IFGITLINK => 0160000,
 929 };
 930
 931 # submodule/subproject, a commit object reference
 932 sub S_ISGITLINK($) {
 933         my $mode = shift;
 934
 935         return (($mode & S_IFMT) == S_IFGITLINK)
 936 }
 937
 938 # convert file mode in octal to symbolic file mode string
 939 sub mode_str {
 940         my $mode = oct shift;
 941
 942         if (S_ISGITLINK($mode)) {
 943                 return 'm---------';
 944         } elsif (S_ISDIR($mode & S_IFMT)) {
 945                 return 'drwxr-xr-x';
 946         } elsif (S_ISLNK($mode)) {
 947                 return 'lrwxrwxrwx';
 948         } elsif (S_ISREG($mode)) {
 949                 # git cares only about the executable bit
 950                 if ($mode & S_IXUSR) {
 951                         return '-rwxr-xr-x';
 952                 } else {
 953                         return '-rw-r--r--';
 954                 };
 955         } else {
 956                 return '----------';
 957         }
 958 }
 959
 960 # convert file mode in octal to file type string
 961 sub file_type {
 962         my $mode = shift;
 963
 964         if ($mode !~ m/^[0-7]+$/) {
 965                 return $mode;
 966         } else {
 967                 $mode = oct $mode;
 968         }
 969
 970         if (S_ISGITLINK($mode)) {
 971                 return "submodule";
 972         } elsif (S_ISDIR($mode & S_IFMT)) {
 973                 return "directory";
 974         } elsif (S_ISLNK($mode)) {
 975                 return "symlink";
 976         } elsif (S_ISREG($mode)) {
 977                 return "file";
 978         } else {
 979                 return "unknown";
 980         }
 981 }
 982
 983 # convert file mode in octal to file type description string
 984 sub file_type_long {
 985         my $mode = shift;
 986
 987         if ($mode !~ m/^[0-7]+$/) {
 988                 return $mode;
 989         } else {
 990                 $mode = oct $mode;
 991         }
 992
 993         if (S_ISGITLINK($mode)) {
 994                 return "submodule";
 995         } elsif (S_ISDIR($mode & S_IFMT)) {
 996                 return "directory";
 997         } elsif (S_ISLNK($mode)) {
 998                 return "symlink";
 999         } elsif (S_ISREG($mode)) {
1000                 if ($mode & S_IXUSR) {
1001                         return "executable";
1002                 } else {
1003                         return "file";
1004                 };
1005         } else {
1006                 return "unknown";
1007         }
1008 }
1009
1010
1011 ## ----------------------------------------------------------------------
1012 ## functions returning short HTML fragments, or transforming HTML fragments
1013 ## which don't belong to other sections
1014
1015 # format line of commit message.
1016 sub format_log_line_html {
1017         my $line = shift;
1018
1019         $line = esc_html($line, -nbsp=>1);
1020         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1021                 my $hash_text = $1;
1022                 my $link =
1023                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1024                                 -class => "text"}, $hash_text);
1025                 $line =~ s/$hash_text/$link/;
1026         }
1027         return $line;
1028 }
1029
1030 # format marker of refs pointing to given object
1031 sub format_ref_marker {
1032         my ($refs, $id) = @_;
1033         my $markers = '';
1034
1035         if (defined $refs->{$id}) {
1036                 foreach my $ref (@{$refs->{$id}}) {
1037                         my ($type, $name) = qw();
1038                         # e.g. tags/v2.6.11 or heads/next
1039                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1040                                 $type = $1;
1041                                 $name = $2;
1042                         } else {
1043                                 $type = "ref";
1044                                 $name = $ref;
1045                         }
1046
1047                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1048                                     esc_html($name) . "</span>";
1049                 }
1050         }
1051
1052         if ($markers) {
1053                 return ' <span class="refs">'. $markers . '</span>';
1054         } else {
1055                 return "";
1056         }
1057 }
1058
1059 # format, perhaps shortened and with markers, title line
1060 sub format_subject_html {
1061         my ($long, $short, $href, $extra) = @_;
1062         $extra = '' unless defined($extra);
1063
1064         if (length($short) < length($long)) {
1065                 return $cgi->a({-href => $href, -class => "list subject",
1066                                 -title => to_utf8($long)},
1067                        esc_html($short) . $extra);
1068         } else {
1069                 return $cgi->a({-href => $href, -class => "list subject"},
1070                        esc_html($long)  . $extra);
1071         }
1072 }
1073
1074 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1075 sub format_git_diff_header_line {
1076         my $line = shift;
1077         my $diffinfo = shift;
1078         my ($from, $to) = @_;
1079
1080         if ($diffinfo->{'nparents'}) {
1081                 # combined diff
1082                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1083                 if ($to->{'href'}) {
1084                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1085                                          esc_path($to->{'file'}));
1086                 } else { # file was deleted (no href)
1087                         $line .= esc_path($to->{'file'});
1088                 }
1089         } else {
1090                 # "ordinary" diff
1091                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1092                 if ($from->{'href'}) {
1093                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1094                                          'a/' . esc_path($from->{'file'}));
1095                 } else { # file was added (no href)
1096                         $line .= 'a/' . esc_path($from->{'file'});
1097                 }
1098                 $line .= ' ';
1099                 if ($to->{'href'}) {
1100                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1101                                          'b/' . esc_path($to->{'file'}));
1102                 } else { # file was deleted
1103                         $line .= 'b/' . esc_path($to->{'file'});
1104                 }
1105         }
1106
1107         return "<div class=\"diff header\">$line</div>\n";
1108 }
1109
1110 # format extended diff header line, before patch itself
1111 sub format_extended_diff_header_line {
1112         my $line = shift;
1113         my $diffinfo = shift;
1114         my ($from, $to) = @_;
1115
1116         # match <path>
1117         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1118                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1119                                        esc_path($from->{'file'}));
1120         }
1121         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1122                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1123                                  esc_path($to->{'file'}));
1124         }
1125         # match single <mode>
1126         if ($line =~ m/\s(\d{6})$/) {
1127                 $line .= '<span class="info"> (' .
1128                          file_type_long($1) .
1129                          ')</span>';
1130         }
1131         # match <hash>
1132         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1133                 # can match only for combined diff
1134                 $line = 'index ';
1135                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1136                         if ($from->{'href'}[$i]) {
1137                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1138                                                   -class=>"hash"},
1139                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1140                         } else {
1141                                 $line .= '0' x 7;
1142                         }
1143                         # separator
1144                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1145                 }
1146                 $line .= '..';
1147                 if ($to->{'href'}) {
1148                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1149                                          substr($diffinfo->{'to_id'},0,7));
1150                 } else {
1151                         $line .= '0' x 7;
1152                 }
1153
1154         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1155                 # can match only for ordinary diff
1156                 my ($from_link, $to_link);
1157                 if ($from->{'href'}) {
1158                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1159                                              substr($diffinfo->{'from_id'},0,7));
1160                 } else {
1161                         $from_link = '0' x 7;
1162                 }
1163                 if ($to->{'href'}) {
1164                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1165                                            substr($diffinfo->{'to_id'},0,7));
1166                 } else {
1167                         $to_link = '0' x 7;
1168                 }
1169                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1170                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1171         }
1172
1173         return $line . "<br/>\n";
1174 }
1175
1176 # format from-file/to-file diff header
1177 sub format_diff_from_to_header {
1178         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1179         my $line;
1180         my $result = '';
1181
1182         $line = $from_line;
1183         #assert($line =~ m/^---/) if DEBUG;
1184         # no extra formatting for "^--- /dev/null"
1185         if (! $diffinfo->{'nparents'}) {
1186                 # ordinary (single parent) diff
1187                 if ($line =~ m!^--- "?a/!) {
1188                         if ($from->{'href'}) {
1189                                 $line = '--- a/' .
1190                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1191                                                 esc_path($from->{'file'}));
1192                         } else {
1193                                 $line = '--- a/' .
1194                                         esc_path($from->{'file'});
1195                         }
1196                 }
1197                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1198
1199         } else {
1200                 # combined diff (merge commit)
1201                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1202                         if ($from->{'href'}[$i]) {
1203                                 $line = '--- ' .
1204                                         $cgi->a({-href=>href(action=>"blobdiff",
1205                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1206                                                              hash_parent_base=>$parents[$i],
1207                                                              file_parent=>$from->{'file'}[$i],
1208                                                              hash=>$diffinfo->{'to_id'},
1209                                                              hash_base=>$hash,
1210                                                              file_name=>$to->{'file'}),
1211                                                  -class=>"path",
1212                                                  -title=>"diff" . ($i+1)},
1213                                                 $i+1) .
1214                                         '/' .
1215                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1216                                                 esc_path($from->{'file'}[$i]));
1217                         } else {
1218                                 $line = '--- /dev/null';
1219                         }
1220                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1221                 }
1222         }
1223
1224         $line = $to_line;
1225         #assert($line =~ m/^\+\+\+/) if DEBUG;
1226         # no extra formatting for "^+++ /dev/null"
1227         if ($line =~ m!^\+\+\+ "?b/!) {
1228                 if ($to->{'href'}) {
1229                         $line = '+++ b/' .
1230                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1231                                         esc_path($to->{'file'}));
1232                 } else {
1233                         $line = '+++ b/' .
1234                                 esc_path($to->{'file'});
1235                 }
1236         }
1237         $result .= qq!<div class="diff to_file">$line</div>\n!;
1238
1239         return $result;
1240 }
1241
1242 # create note for patch simplified by combined diff
1243 sub format_diff_cc_simplified {
1244         my ($diffinfo, @parents) = @_;
1245         my $result = '';
1246
1247         $result .= "<div class=\"diff header\">" .
1248                    "diff --cc ";
1249         if (!is_deleted($diffinfo)) {
1250                 $result .= $cgi->a({-href => href(action=>"blob",
1251                                                   hash_base=>$hash,
1252                                                   hash=>$diffinfo->{'to_id'},
1253                                                   file_name=>$diffinfo->{'to_file'}),
1254                                     -class => "path"},
1255                                    esc_path($diffinfo->{'to_file'}));
1256         } else {
1257                 $result .= esc_path($diffinfo->{'to_file'});
1258         }
1259         $result .= "</div>\n" . # class="diff header"
1260                    "<div class=\"diff nodifferences\">" .
1261                    "Simple merge" .
1262                    "</div>\n"; # class="diff nodifferences"
1263
1264         return $result;
1265 }
1266
1267 # format patch (diff) line (not to be used for diff headers)
1268 sub format_diff_line {
1269         my $line = shift;
1270         my ($from, $to) = @_;
1271         my $diff_class = "";
1272
1273         chomp $line;
1274
1275         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1276                 # combined diff
1277                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1278                 if ($line =~ m/^\@{3}/) {
1279                         $diff_class = " chunk_header";
1280                 } elsif ($line =~ m/^\\/) {
1281                         $diff_class = " incomplete";
1282                 } elsif ($prefix =~ tr/+/+/) {
1283                         $diff_class = " add";
1284                 } elsif ($prefix =~ tr/-/-/) {
1285                         $diff_class = " rem";
1286                 }
1287         } else {
1288                 # assume ordinary diff
1289                 my $char = substr($line, 0, 1);
1290                 if ($char eq '+') {
1291                         $diff_class = " add";
1292                 } elsif ($char eq '-') {
1293                         $diff_class = " rem";
1294                 } elsif ($char eq '@') {
1295                         $diff_class = " chunk_header";
1296                 } elsif ($char eq "\\") {
1297                         $diff_class = " incomplete";
1298                 }
1299         }
1300         $line = untabify($line);
1301         if ($from && $to && $line =~ m/^\@{2} /) {
1302                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1303                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1304
1305                 $from_lines = 0 unless defined $from_lines;
1306                 $to_lines   = 0 unless defined $to_lines;
1307
1308                 if ($from->{'href'}) {
1309                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1310                                              -class=>"list"}, $from_text);
1311                 }
1312                 if ($to->{'href'}) {
1313                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1314                                              -class=>"list"}, $to_text);
1315                 }
1316                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1317                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1318                 return "<div class=\"diff$diff_class\">$line</div>\n";
1319         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1320                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1321                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1322
1323                 @from_text = split(' ', $ranges);
1324                 for (my $i = 0; $i < @from_text; ++$i) {
1325                         ($from_start[$i], $from_nlines[$i]) =
1326                                 (split(',', substr($from_text[$i], 1)), 0);
1327                 }
1328
1329                 $to_text   = pop @from_text;
1330                 $to_start  = pop @from_start;
1331                 $to_nlines = pop @from_nlines;
1332
1333                 $line = "<span class=\"chunk_info\">$prefix ";
1334                 for (my $i = 0; $i < @from_text; ++$i) {
1335                         if ($from->{'href'}[$i]) {
1336                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1337                                                   -class=>"list"}, $from_text[$i]);
1338                         } else {
1339                                 $line .= $from_text[$i];
1340                         }
1341                         $line .= " ";
1342                 }
1343                 if ($to->{'href'}) {
1344                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1345                                           -class=>"list"}, $to_text);
1346                 } else {
1347                         $line .= $to_text;
1348                 }
1349                 $line .= " $prefix</span>" .
1350                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1351                 return "<div class=\"diff$diff_class\">$line</div>\n";
1352         }
1353         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1354 }
1355
1356 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1357 # linked.  Pass the hash of the tree/commit to snapshot.
1358 sub format_snapshot_links {
1359         my ($hash) = @_;
1360         my @snapshot_fmts = gitweb_check_feature('snapshot');
1361         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1362         my $num_fmts = @snapshot_fmts;
1363         if ($num_fmts > 1) {
1364                 # A parenthesized list of links bearing format names.
1365                 # e.g. "snapshot (_tar.gz_ _zip_)"
1366                 return "snapshot (" . join(' ', map
1367                         $cgi->a({
1368                                 -href => href(
1369                                         action=>"snapshot",
1370                                         hash=>$hash,
1371                                         snapshot_format=>$_
1372                                 )
1373                         }, $known_snapshot_formats{$_}{'display'})
1374                 , @snapshot_fmts) . ")";
1375         } elsif ($num_fmts == 1) {
1376                 # A single "snapshot" link whose tooltip bears the format name.
1377                 # i.e. "_snapshot_"
1378                 my ($fmt) = @snapshot_fmts;
1379                 return
1380                         $cgi->a({
1381                                 -href => href(
1382                                         action=>"snapshot",
1383                                         hash=>$hash,
1384                                         snapshot_format=>$fmt
1385                                 ),
1386                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1387                         }, "snapshot");
1388         } else { # $num_fmts == 0
1389                 return undef;
1390         }
1391 }
1392
1393 ## ----------------------------------------------------------------------
1394 ## git utility subroutines, invoking git commands
1395
1396 # returns path to the core git executable and the --git-dir parameter as list
1397 sub git_cmd {
1398         return $GIT, '--git-dir='.$git_dir;
1399 }
1400
1401 # returns path to the core git executable and the --git-dir parameter as string
1402 sub git_cmd_str {
1403         return join(' ', git_cmd());
1404 }
1405
1406 # get HEAD ref of given project as hash
1407 sub git_get_head_hash {
1408         my $project = shift;
1409         my $o_git_dir = $git_dir;
1410         my $retval = undef;
1411         $git_dir = "$projectroot/$project";
1412         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1413                 my $head = <$fd>;
1414                 close $fd;
1415                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1416                         $retval = $1;
1417                 }
1418         }
1419         if (defined $o_git_dir) {
1420                 $git_dir = $o_git_dir;
1421         }
1422         return $retval;
1423 }
1424
1425 # get type of given object
1426 sub git_get_type {
1427         my $hash = shift;
1428
1429         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1430         my $type = <$fd>;
1431         close $fd or return;
1432         chomp $type;
1433         return $type;
1434 }
1435
1436 sub git_get_project_config {
1437         my ($key, $type) = @_;
1438
1439         return unless ($key);
1440         $key =~ s/^gitweb\.//;
1441         return if ($key =~ m/\W/);
1442
1443         my @x = (git_cmd(), 'config');
1444         if (defined $type) { push @x, $type; }
1445         push @x, "--get";
1446         push @x, "gitweb.$key";
1447         my $val = qx(@x);
1448         chomp $val;
1449         return ($val);
1450 }
1451
1452 # get hash of given path at given ref
1453 sub git_get_hash_by_path {
1454         my $base = shift;
1455         my $path = shift || return undef;
1456         my $type = shift;
1457
1458         $path =~ s,/+$,,;
1459
1460         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1461                 or die_error(undef, "Open git-ls-tree failed");
1462         my $line = <$fd>;
1463         close $fd or return undef;
1464
1465         if (!defined $line) {
1466                 # there is no tree or hash given by $path at $base
1467                 return undef;
1468         }
1469
1470         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1471         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1472         if (defined $type && $type ne $2) {
1473                 # type doesn't match
1474                 return undef;
1475         }
1476         return $3;
1477 }
1478
1479 # get path of entry with given hash at given tree-ish (ref)
1480 # used to get 'from' filename for combined diff (merge commit) for renames
1481 sub git_get_path_by_hash {
1482         my $base = shift || return;
1483         my $hash = shift || return;
1484
1485         local $/ = "\0";
1486
1487         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1488                 or return undef;
1489         while (my $line = <$fd>) {
1490                 chomp $line;
1491
1492                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1493                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1494                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1495                         close $fd;
1496                         return $1;
1497                 }
1498         }
1499         close $fd;
1500         return undef;
1501 }
1502
1503 ## ......................................................................
1504 ## git utility functions, directly accessing git repository
1505
1506 sub git_get_project_description {
1507         my $path = shift;
1508
1509         open my $fd, "$projectroot/$path/description" or return undef;
1510         my $descr = <$fd>;
1511         close $fd;
1512         if (defined $descr) {
1513                 chomp $descr;
1514         }
1515         return $descr;
1516 }
1517
1518 sub git_get_project_url_list {
1519         my $path = shift;
1520
1521         open my $fd, "$projectroot/$path/cloneurl" or return;
1522         my @git_project_url_list = map { chomp; $_ } <$fd>;
1523         close $fd;
1524
1525         return wantarray ? @git_project_url_list : \@git_project_url_list;
1526 }
1527
1528 sub git_get_projects_list {
1529         my ($filter) = @_;
1530         my @list;
1531
1532         $filter ||= '';
1533         $filter =~ s/\.git$//;
1534
1535         my ($check_forks) = gitweb_check_feature('forks');
1536
1537         if (-d $projects_list) {
1538                 # search in directory
1539                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1540                 # remove the trailing "/"
1541                 $dir =~ s!/+$!!;
1542                 my $pfxlen = length("$dir");
1543                 my $pfxdepth = ($dir =~ tr!/!!);
1544
1545                 File::Find::find({
1546                         follow_fast => 1, # follow symbolic links
1547                         follow_skip => 2, # ignore duplicates
1548                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1549                         wanted => sub {
1550                                 # skip project-list toplevel, if we get it.
1551                                 return if (m!^[/.]$!);
1552                                 # only directories can be git repositories
1553                                 return unless (-d $_);
1554                                 # don't traverse too deep (Find is super slow on os x)
1555                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1556                                         $File::Find::prune = 1;
1557                                         return;
1558                                 }
1559
1560                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1561                                 # we check related file in $projectroot
1562                                 if ($check_forks and $subdir =~ m#/.#) {
1563                                         $File::Find::prune = 1;
1564                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1565                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1566                                         $File::Find::prune = 1;
1567                                 }
1568                         },
1569                 }, "$dir");
1570
1571         } elsif (-f $projects_list) {
1572                 # read from file(url-encoded):
1573                 # 'git%2Fgit.git Linus+Torvalds'
1574                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1575                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1576                 my %paths;
1577                 open my ($fd), $projects_list or return;
1578         PROJECT:
1579                 while (my $line = <$fd>) {
1580                         chomp $line;
1581                         my ($path, $owner) = split ' ', $line;
1582                         $path = unescape($path);
1583                         $owner = unescape($owner);
1584                         if (!defined $path) {
1585                                 next;
1586                         }
1587                         if ($filter ne '') {
1588                                 # looking for forks;
1589                                 my $pfx = substr($path, 0, length($filter));
1590                                 if ($pfx ne $filter) {
1591                                         next PROJECT;
1592                                 }
1593                                 my $sfx = substr($path, length($filter));
1594                                 if ($sfx !~ /^\/.*\.git$/) {
1595                                         next PROJECT;
1596                                 }
1597                         } elsif ($check_forks) {
1598                         PATH:
1599                                 foreach my $filter (keys %paths) {
1600                                         # looking for forks;
1601                                         my $pfx = substr($path, 0, length($filter));
1602                                         if ($pfx ne $filter) {
1603                                                 next PATH;
1604                                         }
1605                                         my $sfx = substr($path, length($filter));
1606                                         if ($sfx !~ /^\/.*\.git$/) {
1607                                                 next PATH;
1608                                         }
1609                                         # is a fork, don't include it in
1610                                         # the list
1611                                         next PROJECT;
1612                                 }
1613                         }
1614                         if (check_export_ok("$projectroot/$path")) {
1615                                 my $pr = {
1616                                         path => $path,
1617                                         owner => to_utf8($owner),
1618                                 };
1619                                 push @list, $pr;
1620                                 (my $forks_path = $path) =~ s/\.git$//;
1621                                 $paths{$forks_path}++;
1622                         }
1623                 }
1624                 close $fd;
1625         }
1626         return @list;
1627 }
1628
1629 our $gitweb_project_owner = undef;
1630 sub git_get_project_list_from_file {
1631
1632         return if (defined $gitweb_project_owner);
1633
1634         $gitweb_project_owner = {};
1635         # read from file (url-encoded):
1636         # 'git%2Fgit.git Linus+Torvalds'
1637         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1638         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1639         if (-f $projects_list) {
1640                 open (my $fd , $projects_list);
1641                 while (my $line = <$fd>) {
1642                         chomp $line;
1643                         my ($pr, $ow) = split ' ', $line;
1644                         $pr = unescape($pr);
1645                         $ow = unescape($ow);
1646                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1647                 }
1648                 close $fd;
1649         }
1650 }
1651
1652 sub git_get_project_owner {
1653         my $project = shift;
1654         my $owner;
1655
1656         return undef unless $project;
1657
1658         if (!defined $gitweb_project_owner) {
1659                 git_get_project_list_from_file();
1660         }
1661
1662         if (exists $gitweb_project_owner->{$project}) {
1663                 $owner = $gitweb_project_owner->{$project};
1664         }
1665         if (!defined $owner) {
1666                 $owner = get_file_owner("$projectroot/$project");
1667         }
1668
1669         return $owner;
1670 }
1671
1672 sub git_get_last_activity {
1673         my ($path) = @_;
1674         my $fd;
1675
1676         $git_dir = "$projectroot/$path";
1677         open($fd, "-|", git_cmd(), 'for-each-ref',
1678              '--format=%(committer)',
1679              '--sort=-committerdate',
1680              '--count=1',
1681              'refs/heads') or return;
1682         my $most_recent = <$fd>;
1683         close $fd or return;
1684         if (defined $most_recent &&
1685             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1686                 my $timestamp = $1;
1687                 my $age = time - $timestamp;
1688                 return ($age, age_string($age));
1689         }
1690         return (undef, undef);
1691 }
1692
1693 sub git_get_references {
1694         my $type = shift || "";
1695         my %refs;
1696         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1697         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1698         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1699                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1700                 or return;
1701
1702         while (my $line = <$fd>) {
1703                 chomp $line;
1704                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1705                         if (defined $refs{$1}) {
1706                                 push @{$refs{$1}}, $2;
1707                         } else {
1708                                 $refs{$1} = [ $2 ];
1709                         }
1710                 }
1711         }
1712         close $fd or return;
1713         return \%refs;
1714 }
1715
1716 sub git_get_rev_name_tags {
1717         my $hash = shift || return undef;
1718
1719         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1720                 or return;
1721         my $name_rev = <$fd>;
1722         close $fd;
1723
1724         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1725                 return $1;
1726         } else {
1727                 # catches also '$hash undefined' output
1728                 return undef;
1729         }
1730 }
1731
1732 ## ----------------------------------------------------------------------
1733 ## parse to hash functions
1734
1735 sub parse_date {
1736         my $epoch = shift;
1737         my $tz = shift || "-0000";
1738
1739         my %date;
1740         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1741         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1742         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1743         $date{'hour'} = $hour;
1744         $date{'minute'} = $min;
1745         $date{'mday'} = $mday;
1746         $date{'day'} = $days[$wday];
1747         $date{'month'} = $months[$mon];
1748         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1749                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1750         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1751                              $mday, $months[$mon], $hour ,$min;
1752         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1753                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1754
1755         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1756         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1757         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1758         $date{'hour_local'} = $hour;
1759         $date{'minute_local'} = $min;
1760         $date{'tz_local'} = $tz;
1761         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1762                                   1900+$year, $mon+1, $mday,
1763                                   $hour, $min, $sec, $tz);
1764         return %date;
1765 }
1766
1767 sub parse_tag {
1768         my $tag_id = shift;
1769         my %tag;
1770         my @comment;
1771
1772         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1773         $tag{'id'} = $tag_id;
1774         while (my $line = <$fd>) {
1775                 chomp $line;
1776                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1777                         $tag{'object'} = $1;
1778                 } elsif ($line =~ m/^type (.+)$/) {
1779                         $tag{'type'} = $1;
1780                 } elsif ($line =~ m/^tag (.+)$/) {
1781                         $tag{'name'} = $1;
1782                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1783                         $tag{'author'} = $1;
1784                         $tag{'epoch'} = $2;
1785                         $tag{'tz'} = $3;
1786                 } elsif ($line =~ m/--BEGIN/) {
1787                         push @comment, $line;
1788                         last;
1789                 } elsif ($line eq "") {
1790                         last;
1791                 }
1792         }
1793         push @comment, <$fd>;
1794         $tag{'comment'} = \@comment;
1795         close $fd or return;
1796         if (!defined $tag{'name'}) {
1797                 return
1798         };
1799         return %tag
1800 }
1801
1802 sub parse_commit_text {
1803         my ($commit_text, $withparents) = @_;
1804         my @commit_lines = split '\n', $commit_text;
1805         my %co;
1806
1807         pop @commit_lines; # Remove '\0'
1808
1809         if (! @commit_lines) {
1810                 return;
1811         }
1812
1813         my $header = shift @commit_lines;
1814         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1815                 return;
1816         }
1817         ($co{'id'}, my @parents) = split ' ', $header;
1818         while (my $line = shift @commit_lines) {
1819                 last if $line eq "\n";
1820                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1821                         $co{'tree'} = $1;
1822                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1823                         push @parents, $1;
1824                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1825                         $co{'author'} = $1;
1826                         $co{'author_epoch'} = $2;
1827                         $co{'author_tz'} = $3;
1828                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1829                                 $co{'author_name'}  = $1;
1830                                 $co{'author_email'} = $2;
1831                         } else {
1832                                 $co{'author_name'} = $co{'author'};
1833                         }
1834                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1835                         $co{'committer'} = $1;
1836                         $co{'committer_epoch'} = $2;
1837                         $co{'committer_tz'} = $3;
1838                         $co{'committer_name'} = $co{'committer'};
1839                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1840                                 $co{'committer_name'}  = $1;
1841                                 $co{'committer_email'} = $2;
1842                         } else {
1843                                 $co{'committer_name'} = $co{'committer'};
1844                         }
1845                 }
1846         }
1847         if (!defined $co{'tree'}) {
1848                 return;
1849         };
1850         $co{'parents'} = \@parents;
1851         $co{'parent'} = $parents[0];
1852
1853         foreach my $title (@commit_lines) {
1854                 $title =~ s/^    //;
1855                 if ($title ne "") {
1856                         $co{'title'} = chop_str($title, 80, 5);
1857                         # remove leading stuff of merges to make the interesting part visible
1858                         if (length($title) > 50) {
1859                                 $title =~ s/^Automatic //;
1860                                 $title =~ s/^merge (of|with) /Merge ... /i;
1861                                 if (length($title) > 50) {
1862                                         $title =~ s/(http|rsync):\/\///;
1863                                 }
1864                                 if (length($title) > 50) {
1865                                         $title =~ s/(master|www|rsync)\.//;
1866                                 }
1867                                 if (length($title) > 50) {
1868                                         $title =~ s/kernel.org:?//;
1869                                 }
1870                                 if (length($title) > 50) {
1871                                         $title =~ s/\/pub\/scm//;
1872                                 }
1873                         }
1874                         $co{'title_short'} = chop_str($title, 50, 5);
1875                         last;
1876                 }
1877         }
1878         if ($co{'title'} eq "") {
1879                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1880         }
1881         # remove added spaces
1882         foreach my $line (@commit_lines) {
1883                 $line =~ s/^    //;
1884         }
1885         $co{'comment'} = \@commit_lines;
1886
1887         my $age = time - $co{'committer_epoch'};
1888         $co{'age'} = $age;
1889         $co{'age_string'} = age_string($age);
1890         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1891         if ($age > 60*60*24*7*2) {
1892                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1893                 $co{'age_string_age'} = $co{'age_string'};
1894         } else {
1895                 $co{'age_string_date'} = $co{'age_string'};
1896                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1897         }
1898         return %co;
1899 }
1900
1901 sub parse_commit {
1902         my ($commit_id) = @_;
1903         my %co;
1904
1905         local $/ = "\0";
1906
1907         open my $fd, "-|", git_cmd(), "rev-list",
1908                 "--parents",
1909                 "--header",
1910                 "--max-count=1",
1911                 $commit_id,
1912                 "--",
1913                 or die_error(undef, "Open git-rev-list failed");
1914         %co = parse_commit_text(<$fd>, 1);
1915         close $fd;
1916
1917         return %co;
1918 }
1919
1920 sub parse_commits {
1921         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1922         my @cos;
1923
1924         $maxcount ||= 1;
1925         $skip ||= 0;
1926
1927         local $/ = "\0";
1928
1929         open my $fd, "-|", git_cmd(), "rev-list",
1930                 "--header",
1931                 ($arg ? ($arg) : ()),
1932                 ("--max-count=" . $maxcount),
1933                 ("--skip=" . $skip),
1934                 @extra_options,
1935                 $commit_id,
1936                 "--",
1937                 ($filename ? ($filename) : ())
1938                 or die_error(undef, "Open git-rev-list failed");
1939         while (my $line = <$fd>) {
1940                 my %co = parse_commit_text($line);
1941                 push @cos, \%co;
1942         }
1943         close $fd;
1944
1945         return wantarray ? @cos : \@cos;
1946 }
1947
1948 # parse ref from ref_file, given by ref_id, with given type
1949 sub parse_ref {
1950         my $ref_file = shift;
1951         my $ref_id = shift;
1952         my $type = shift || git_get_type($ref_id);
1953         my %ref_item;
1954
1955         $ref_item{'type'} = $type;
1956         $ref_item{'id'} = $ref_id;
1957         $ref_item{'epoch'} = 0;
1958         $ref_item{'age'} = "unknown";
1959         if ($type eq "tag") {
1960                 my %tag = parse_tag($ref_id);
1961                 $ref_item{'comment'} = $tag{'comment'};
1962                 if ($tag{'type'} eq "commit") {
1963                         my %co = parse_commit($tag{'object'});
1964                         $ref_item{'epoch'} = $co{'committer_epoch'};
1965                         $ref_item{'age'} = $co{'age_string'};
1966                 } elsif (defined($tag{'epoch'})) {
1967                         my $age = time - $tag{'epoch'};
1968                         $ref_item{'epoch'} = $tag{'epoch'};
1969                         $ref_item{'age'} = age_string($age);
1970                 }
1971                 $ref_item{'reftype'} = $tag{'type'};
1972                 $ref_item{'name'} = $tag{'name'};
1973                 $ref_item{'refid'} = $tag{'object'};
1974         } elsif ($type eq "commit"){
1975                 my %co = parse_commit($ref_id);
1976                 $ref_item{'reftype'} = "commit";
1977                 $ref_item{'name'} = $ref_file;
1978                 $ref_item{'title'} = $co{'title'};
1979                 $ref_item{'refid'} = $ref_id;
1980                 $ref_item{'epoch'} = $co{'committer_epoch'};
1981                 $ref_item{'age'} = $co{'age_string'};
1982         } else {
1983                 $ref_item{'reftype'} = $type;
1984                 $ref_item{'name'} = $ref_file;
1985                 $ref_item{'refid'} = $ref_id;
1986         }
1987
1988         return %ref_item;
1989 }
1990
1991 # parse line of git-diff-tree "raw" output
1992 sub parse_difftree_raw_line {
1993         my $line = shift;
1994         my %res;
1995
1996         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1997         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1998         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1999                 $res{'from_mode'} = $1;
2000                 $res{'to_mode'} = $2;
2001                 $res{'from_id'} = $3;
2002                 $res{'to_id'} = $4;
2003                 $res{'status'} = $res{'status_str'} = $5;
2004                 $res{'similarity'} = $6;
2005                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2006                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2007                 } else {
2008                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2009                 }
2010         }
2011         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2012         # combined diff (for merge commit)
2013         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2014                 $res{'nparents'}  = length($1);
2015                 $res{'from_mode'} = [ split(' ', $2) ];
2016                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2017                 $res{'from_id'} = [ split(' ', $3) ];
2018                 $res{'to_id'} = pop @{$res{'from_id'}};
2019                 $res{'status_str'} = $4;
2020                 $res{'status'} = [ split('', $4) ];
2021                 $res{'to_file'} = unquote($5);
2022         }
2023         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2024         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2025                 $res{'commit'} = $1;
2026         }
2027
2028         return wantarray ? %res : \%res;
2029 }
2030
2031 # wrapper: return parsed line of git-diff-tree "raw" output
2032 # (the argument might be raw line, or parsed info)
2033 sub parsed_difftree_line {
2034         my $line_or_ref = shift;
2035
2036         if (ref($line_or_ref) eq "HASH") {
2037                 # pre-parsed (or generated by hand)
2038                 return $line_or_ref;
2039         } else {
2040                 return parse_difftree_raw_line($line_or_ref);
2041         }
2042 }
2043
2044 # parse line of git-ls-tree output
2045 sub parse_ls_tree_line ($;%) {
2046         my $line = shift;
2047         my %opts = @_;
2048         my %res;
2049
2050         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2051         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2052
2053         $res{'mode'} = $1;
2054         $res{'type'} = $2;
2055         $res{'hash'} = $3;
2056         if ($opts{'-z'}) {
2057                 $res{'name'} = $4;
2058         } else {
2059                 $res{'name'} = unquote($4);
2060         }
2061
2062         return wantarray ? %res : \%res;
2063 }
2064
2065 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2066 sub parse_from_to_diffinfo {
2067         my ($diffinfo, $from, $to, @parents) = @_;
2068
2069         if ($diffinfo->{'nparents'}) {
2070                 # combined diff
2071                 $from->{'file'} = [];
2072                 $from->{'href'} = [];
2073                 fill_from_file_info($diffinfo, @parents)
2074                         unless exists $diffinfo->{'from_file'};
2075                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2076                         $from->{'file'}[$i] =
2077                                 defined $diffinfo->{'from_file'}[$i] ?
2078                                         $diffinfo->{'from_file'}[$i] :
2079                                         $diffinfo->{'to_file'};
2080                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2081                                 $from->{'href'}[$i] = href(action=>"blob",
2082                                                            hash_base=>$parents[$i],
2083                                                            hash=>$diffinfo->{'from_id'}[$i],
2084                                                            file_name=>$from->{'file'}[$i]);
2085                         } else {
2086                                 $from->{'href'}[$i] = undef;
2087                         }
2088                 }
2089         } else {
2090                 # ordinary (not combined) diff
2091                 $from->{'file'} = $diffinfo->{'from_file'};
2092                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2093                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2094                                                hash=>$diffinfo->{'from_id'},
2095                                                file_name=>$from->{'file'});
2096                 } else {
2097                         delete $from->{'href'};
2098                 }
2099         }
2100
2101         $to->{'file'} = $diffinfo->{'to_file'};
2102         if (!is_deleted($diffinfo)) { # file exists in result
2103                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2104                                      hash=>$diffinfo->{'to_id'},
2105                                      file_name=>$to->{'file'});
2106         } else {
2107                 delete $to->{'href'};
2108         }
2109 }
2110
2111 ## ......................................................................
2112 ## parse to array of hashes functions
2113
2114 sub git_get_heads_list {
2115         my $limit = shift;
2116         my @headslist;
2117
2118         open my $fd, '-|', git_cmd(), 'for-each-ref',
2119                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2120                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2121                 'refs/heads'
2122                 or return;
2123         while (my $line = <$fd>) {
2124                 my %ref_item;
2125
2126                 chomp $line;
2127                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2128                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2129                 my ($committer, $epoch, $tz) =
2130                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2131                 $name =~ s!^refs/heads/!!;
2132
2133                 $ref_item{'name'}  = $name;
2134                 $ref_item{'id'}    = $hash;
2135                 $ref_item{'title'} = $title || '(no commit message)';
2136                 $ref_item{'epoch'} = $epoch;
2137                 if ($epoch) {
2138                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2139                 } else {
2140                         $ref_item{'age'} = "unknown";
2141                 }
2142
2143                 push @headslist, \%ref_item;
2144         }
2145         close $fd;
2146
2147         return wantarray ? @headslist : \@headslist;
2148 }
2149
2150 sub git_get_tags_list {
2151         my $limit = shift;
2152         my @tagslist;
2153
2154         open my $fd, '-|', git_cmd(), 'for-each-ref',
2155                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2156                 '--format=%(objectname) %(objecttype) %(refname) '.
2157                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2158                 'refs/tags'
2159                 or return;
2160         while (my $line = <$fd>) {
2161                 my %ref_item;
2162
2163                 chomp $line;
2164                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2165                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2166                 my ($creator, $epoch, $tz) =
2167                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2168                 $name =~ s!^refs/tags/!!;
2169
2170                 $ref_item{'type'} = $type;
2171                 $ref_item{'id'} = $id;
2172                 $ref_item{'name'} = $name;
2173                 if ($type eq "tag") {
2174                         $ref_item{'subject'} = $title;
2175                         $ref_item{'reftype'} = $reftype;
2176                         $ref_item{'refid'}   = $refid;
2177                 } else {
2178                         $ref_item{'reftype'} = $type;
2179                         $ref_item{'refid'}   = $id;
2180                 }
2181
2182                 if ($type eq "tag" || $type eq "commit") {
2183                         $ref_item{'epoch'} = $epoch;
2184                         if ($epoch) {
2185                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2186                         } else {
2187                                 $ref_item{'age'} = "unknown";
2188                         }
2189                 }
2190
2191                 push @tagslist, \%ref_item;
2192         }
2193         close $fd;
2194
2195         return wantarray ? @tagslist : \@tagslist;
2196 }
2197
2198 ## ----------------------------------------------------------------------
2199 ## filesystem-related functions
2200
2201 sub get_file_owner {
2202         my $path = shift;
2203
2204         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2205         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2206         if (!defined $gcos) {
2207                 return undef;
2208         }
2209         my $owner = $gcos;
2210         $owner =~ s/[,;].*$//;
2211         return to_utf8($owner);
2212 }
2213
2214 ## ......................................................................
2215 ## mimetype related functions
2216
2217 sub mimetype_guess_file {
2218         my $filename = shift;
2219         my $mimemap = shift;
2220         -r $mimemap or return undef;
2221
2222         my %mimemap;
2223         open(MIME, $mimemap) or return undef;
2224         while (<MIME>) {
2225                 next if m/^#/; # skip comments
2226                 my ($mime, $exts) = split(/\t+/);
2227                 if (defined $exts) {
2228                         my @exts = split(/\s+/, $exts);
2229                         foreach my $ext (@exts) {
2230                                 $mimemap{$ext} = $mime;
2231                         }
2232                 }
2233         }
2234         close(MIME);
2235
2236         $filename =~ /\.([^.]*)$/;
2237         return $mimemap{$1};
2238 }
2239
2240 sub mimetype_guess {
2241         my $filename = shift;
2242         my $mime;
2243         $filename =~ /\./ or return undef;
2244
2245         if ($mimetypes_file) {
2246                 my $file = $mimetypes_file;
2247                 if ($file !~ m!^/!) { # if it is relative path
2248                         # it is relative to project
2249                         $file = "$projectroot/$project/$file";
2250                 }
2251                 $mime = mimetype_guess_file($filename, $file);
2252         }
2253         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2254         return $mime;
2255 }
2256
2257 sub blob_mimetype {
2258         my $fd = shift;
2259         my $filename = shift;
2260
2261         if ($filename) {
2262                 my $mime = mimetype_guess($filename);
2263                 $mime and return $mime;
2264         }
2265
2266         # just in case
2267         return $default_blob_plain_mimetype unless $fd;
2268
2269         if (-T $fd) {
2270                 return 'text/plain' .
2271                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2272         } elsif (! $filename) {
2273                 return 'application/octet-stream';
2274         } elsif ($filename =~ m/\.png$/i) {
2275                 return 'image/png';
2276         } elsif ($filename =~ m/\.gif$/i) {
2277                 return 'image/gif';
2278         } elsif ($filename =~ m/\.jpe?g$/i) {
2279                 return 'image/jpeg';
2280         } else {
2281                 return 'application/octet-stream';
2282         }
2283 }
2284
2285 ## ======================================================================
2286 ## functions printing HTML: header, footer, error page
2287
2288 sub git_header_html {
2289         my $status = shift || "200 OK";
2290         my $expires = shift;
2291
2292         my $title = "$site_name";
2293         if (defined $project) {
2294                 $title .= " - " . to_utf8($project);
2295                 if (defined $action) {
2296                         $title .= "/$action";
2297                         if (defined $file_name) {
2298                                 $title .= " - " . esc_path($file_name);
2299                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2300                                         $title .= "/";
2301                                 }
2302                         }
2303                 }
2304         }
2305         my $content_type;
2306         # require explicit support from the UA if we are to send the page as
2307         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2308         # we have to do this because MSIE sometimes globs '*/*', pretending to
2309         # support xhtml+xml but choking when it gets what it asked for.
2310         if (defined $cgi->http('HTTP_ACCEPT') &&
2311             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2312             $cgi->Accept('application/xhtml+xml') != 0) {
2313                 $content_type = 'application/xhtml+xml';
2314         } else {
2315                 $content_type = 'text/html';
2316         }
2317         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2318                            -status=> $status, -expires => $expires);
2319         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2320         print <<EOF;
2321 <?xml version="1.0" encoding="utf-8"?>
2322 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2323 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2324 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2325 <!-- git core binaries version $git_version -->
2326 <head>
2327 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2328 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2329 <meta name="robots" content="index, nofollow"/>
2330 <title>$title</title>
2331 EOF
2332 # print out each stylesheet that exist
2333         if (defined $stylesheet) {
2334 #provides backwards capability for those people who define style sheet in a config file
2335                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2336         } else {
2337                 foreach my $stylesheet (@stylesheets) {
2338                         next unless $stylesheet;
2339                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2340                 }
2341         }
2342         if (defined $project) {
2343                 printf('<link rel="alternate" title="%s log RSS feed" '.
2344                        'href="%s" type="application/rss+xml" />'."\n",
2345                        esc_param($project), href(action=>"rss"));
2346                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2347                        'href="%s" type="application/rss+xml" />'."\n",
2348                        esc_param($project), href(action=>"rss",
2349                                                  extra_options=>"--no-merges"));
2350                 printf('<link rel="alternate" title="%s log Atom feed" '.
2351                        'href="%s" type="application/atom+xml" />'."\n",
2352                        esc_param($project), href(action=>"atom"));
2353                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2354                        'href="%s" type="application/atom+xml" />'."\n",
2355                        esc_param($project), href(action=>"atom",
2356                                                  extra_options=>"--no-merges"));
2357         } else {
2358                 printf('<link rel="alternate" title="%s projects list" '.
2359                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2360                        $site_name, href(project=>undef, action=>"project_index"));
2361                 printf('<link rel="alternate" title="%s projects feeds" '.
2362                        'href="%s" type="text/x-opml"/>'."\n",
2363                        $site_name, href(project=>undef, action=>"opml"));
2364         }
2365         if (defined $favicon) {
2366                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2367         }
2368
2369         print "</head>\n" .
2370               "<body>\n";
2371
2372         if (-f $site_header) {
2373                 open (my $fd, $site_header);
2374                 print <$fd>;
2375                 close $fd;
2376         }
2377
2378         print "<div class=\"page_header\">\n" .
2379               $cgi->a({-href => esc_url($logo_url),
2380                        -title => $logo_label},
2381                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2382         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2383         if (defined $project) {
2384                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2385                 if (defined $action) {
2386                         print " / $action";
2387                 }
2388                 print "\n";
2389         }
2390         print "</div>\n";
2391
2392         my ($have_search) = gitweb_check_feature('search');
2393         if ((defined $project) && ($have_search)) {
2394                 if (!defined $searchtext) {
2395                         $searchtext = "";
2396                 }
2397                 my $search_hash;
2398                 if (defined $hash_base) {
2399                         $search_hash = $hash_base;
2400                 } elsif (defined $hash) {
2401                         $search_hash = $hash;
2402                 } else {
2403                         $search_hash = "HEAD";
2404                 }
2405                 my $action = $my_uri;
2406                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2407                 if ($use_pathinfo) {
2408                         $action .= "/$project";
2409                 } else {
2410                         $cgi->param("p", $project);
2411                 }
2412                 $cgi->param("a", "search");
2413                 $cgi->param("h", $search_hash);
2414                 print $cgi->startform(-method => "get", -action => $action) .
2415                       "<div class=\"search\">\n" .
2416                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2417                       $cgi->hidden(-name => "a") . "\n" .
2418                       $cgi->hidden(-name => "h") . "\n" .
2419                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2420                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2421                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2422                       " search:\n",
2423                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2424                       "</div>" .
2425                       $cgi->end_form() . "\n";
2426         }
2427 }
2428
2429 sub git_footer_html {
2430         print "<div class=\"page_footer\">\n";
2431         if (defined $project) {
2432                 my $descr = git_get_project_description($project);
2433                 if (defined $descr) {
2434                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2435                 }
2436                 print $cgi->a({-href => href(action=>"rss"),
2437                               -class => "rss_logo"}, "RSS") . " ";
2438                 print $cgi->a({-href => href(action=>"atom"),
2439                               -class => "rss_logo"}, "Atom") . "\n";
2440         } else {
2441                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2442                               -class => "rss_logo"}, "OPML") . " ";
2443                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2444                               -class => "rss_logo"}, "TXT") . "\n";
2445         }
2446         print "</div>\n" ;
2447
2448         if (-f $site_footer) {
2449                 open (my $fd, $site_footer);
2450                 print <$fd>;
2451                 close $fd;
2452         }
2453
2454         print "</body>\n" .
2455               "</html>";
2456 }
2457
2458 sub die_error {
2459         my $status = shift || "403 Forbidden";
2460         my $error = shift || "Malformed query, file missing or permission denied";
2461
2462         git_header_html($status);
2463         print <<EOF;
2464 <div class="page_body">
2465 <br /><br />
2466 $status - $error
2467 <br />
2468 </div>
2469 EOF
2470         git_footer_html();
2471         exit;
2472 }
2473
2474 ## ----------------------------------------------------------------------
2475 ## functions printing or outputting HTML: navigation
2476
2477 sub git_print_page_nav {
2478         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2479         $extra = '' if !defined $extra; # pager or formats
2480
2481         my @navs = qw(summary shortlog log commit commitdiff tree);
2482         if ($suppress) {
2483                 @navs = grep { $_ ne $suppress } @navs;
2484         }
2485
2486         my %arg = map { $_ => {action=>$_} } @navs;
2487         if (defined $head) {
2488                 for (qw(commit commitdiff)) {
2489                         $arg{$_}{'hash'} = $head;
2490                 }
2491                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2492                         for (qw(shortlog log)) {
2493                                 $arg{$_}{'hash'} = $head;
2494                         }
2495                 }
2496         }
2497         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2498         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2499
2500         print "<div class=\"page_nav\">\n" .
2501                 (join " | ",
2502                  map { $_ eq $current ?
2503                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2504                  } @navs);
2505         print "<br/>\n$extra<br/>\n" .
2506               "</div>\n";
2507 }
2508
2509 sub format_paging_nav {
2510         my ($action, $hash, $head, $page, $nrevs) = @_;
2511         my $paging_nav;
2512
2513
2514         if ($hash ne $head || $page) {
2515                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2516         } else {
2517                 $paging_nav .= "HEAD";
2518         }
2519
2520         if ($page > 0) {
2521                 $paging_nav .= " &sdot; " .
2522                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2523                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2524         } else {
2525                 $paging_nav .= " &sdot; prev";
2526         }
2527
2528         if ($nrevs >= (100 * ($page+1)-1)) {
2529                 $paging_nav .= " &sdot; " .
2530                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2531                                  -accesskey => "n", -title => "Alt-n"}, "next");
2532         } else {
2533                 $paging_nav .= " &sdot; next";
2534         }
2535
2536         return $paging_nav;
2537 }
2538
2539 ## ......................................................................
2540 ## functions printing or outputting HTML: div
2541
2542 sub git_print_header_div {
2543         my ($action, $title, $hash, $hash_base) = @_;
2544         my %args = ();
2545
2546         $args{'action'} = $action;
2547         $args{'hash'} = $hash if $hash;
2548         $args{'hash_base'} = $hash_base if $hash_base;
2549
2550         print "<div class=\"header\">\n" .
2551               $cgi->a({-href => href(%args), -class => "title"},
2552               $title ? $title : $action) .
2553               "\n</div>\n";
2554 }
2555
2556 #sub git_print_authorship (\%) {
2557 sub git_print_authorship {
2558         my $co = shift;
2559
2560         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2561         print "<div class=\"author_date\">" .
2562               esc_html($co->{'author_name'}) .
2563               " [$ad{'rfc2822'}";
2564         if ($ad{'hour_local'} < 6) {
2565                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2566                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2567         } else {
2568                 printf(" (%02d:%02d %s)",
2569                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2570         }
2571         print "]</div>\n";
2572 }
2573
2574 sub git_print_page_path {
2575         my $name = shift;
2576         my $type = shift;
2577         my $hb = shift;
2578
2579
2580         print "<div class=\"page_path\">";
2581         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2582                       -title => 'tree root'}, to_utf8("[$project]"));
2583         print " / ";
2584         if (defined $name) {
2585                 my @dirname = split '/', $name;
2586                 my $basename = pop @dirname;
2587                 my $fullname = '';
2588
2589                 foreach my $dir (@dirname) {
2590                         $fullname .= ($fullname ? '/' : '') . $dir;
2591                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2592                                                      hash_base=>$hb),
2593                                       -title => $fullname}, esc_path($dir));
2594                         print " / ";
2595                 }
2596                 if (defined $type && $type eq 'blob') {
2597                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2598                                                      hash_base=>$hb),
2599                                       -title => $name}, esc_path($basename));
2600                 } elsif (defined $type && $type eq 'tree') {
2601                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2602                                                      hash_base=>$hb),
2603                                       -title => $name}, esc_path($basename));
2604                         print " / ";
2605                 } else {
2606                         print esc_path($basename);
2607                 }
2608         }
2609         print "<br/></div>\n";
2610 }
2611
2612 # sub git_print_log (\@;%) {
2613 sub git_print_log ($;%) {
2614         my $log = shift;
2615         my %opts = @_;
2616
2617         if ($opts{'-remove_title'}) {
2618                 # remove title, i.e. first line of log
2619                 shift @$log;
2620         }
2621         # remove leading empty lines
2622         while (defined $log->[0] && $log->[0] eq "") {
2623                 shift @$log;
2624         }
2625
2626         # print log
2627         my $signoff = 0;
2628         my $empty = 0;
2629         foreach my $line (@$log) {
2630                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2631                         $signoff = 1;
2632                         $empty = 0;
2633                         if (! $opts{'-remove_signoff'}) {
2634                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2635                                 next;
2636                         } else {
2637                                 # remove signoff lines
2638                                 next;
2639                         }
2640                 } else {
2641                         $signoff = 0;
2642                 }
2643
2644                 # print only one empty line
2645                 # do not print empty line after signoff
2646                 if ($line eq "") {
2647                         next if ($empty || $signoff);
2648                         $empty = 1;
2649                 } else {
2650                         $empty = 0;
2651                 }
2652
2653                 print format_log_line_html($line) . "<br/>\n";
2654         }
2655
2656         if ($opts{'-final_empty_line'}) {
2657                 # end with single empty line
2658                 print "<br/>\n" unless $empty;
2659         }
2660 }
2661
2662 # return link target (what link points to)
2663 sub git_get_link_target {
2664         my $hash = shift;
2665         my $link_target;
2666
2667         # read link
2668         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2669                 or return;
2670         {
2671                 local $/;
2672                 $link_target = <$fd>;
2673         }
2674         close $fd
2675                 or return;
2676
2677         return $link_target;
2678 }
2679
2680 # given link target, and the directory (basedir) the link is in,
2681 # return target of link relative to top directory (top tree);
2682 # return undef if it is not possible (including absolute links).
2683 sub normalize_link_target {
2684         my ($link_target, $basedir, $hash_base) = @_;
2685
2686         # we can normalize symlink target only if $hash_base is provided
2687         return unless $hash_base;
2688
2689         # absolute symlinks (beginning with '/') cannot be normalized
2690         return if (substr($link_target, 0, 1) eq '/');
2691
2692         # normalize link target to path from top (root) tree (dir)
2693         my $path;
2694         if ($basedir) {
2695                 $path = $basedir . '/' . $link_target;
2696         } else {
2697                 # we are in top (root) tree (dir)
2698                 $path = $link_target;
2699         }
2700
2701         # remove //, /./, and /../
2702         my @path_parts;
2703         foreach my $part (split('/', $path)) {
2704                 # discard '.' and ''
2705                 next if (!$part || $part eq '.');
2706                 # handle '..'
2707                 if ($part eq '..') {
2708                         if (@path_parts) {
2709                                 pop @path_parts;
2710                         } else {
2711                                 # link leads outside repository (outside top dir)
2712                                 return;
2713                         }
2714                 } else {
2715                         push @path_parts, $part;
2716                 }
2717         }
2718         $path = join('/', @path_parts);
2719
2720         return $path;
2721 }
2722
2723 # print tree entry (row of git_tree), but without encompassing <tr> element
2724 sub git_print_tree_entry {
2725         my ($t, $basedir, $hash_base, $have_blame) = @_;
2726
2727         my %base_key = ();
2728         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2729
2730         # The format of a table row is: mode list link.  Where mode is
2731         # the mode of the entry, list is the name of the entry, an href,
2732         # and link is the action links of the entry.
2733
2734         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2735         if ($t->{'type'} eq "blob") {
2736                 print "<td class=\"list\">" .
2737                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2738                                                file_name=>"$basedir$t->{'name'}", %base_key),
2739                                 -class => "list"}, esc_path($t->{'name'}));
2740                 if (S_ISLNK(oct $t->{'mode'})) {
2741                         my $link_target = git_get_link_target($t->{'hash'});
2742                         if ($link_target) {
2743                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2744                                 if (defined $norm_target) {
2745                                         print " -> " .
2746                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2747                                                                      file_name=>$norm_target),
2748                                                        -title => $norm_target}, esc_path($link_target));
2749                                 } else {
2750                                         print " -> " . esc_path($link_target);
2751                                 }
2752                         }
2753                 }
2754                 print "</td>\n";
2755                 print "<td class=\"link\">";
2756                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2757                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2758                               "blob");
2759                 if ($have_blame) {
2760                         print " | " .
2761                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2762                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2763                                       "blame");
2764                 }
2765                 if (defined $hash_base) {
2766                         print " | " .
2767                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2768                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2769                                       "history");
2770                 }
2771                 print " | " .
2772                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2773                                                file_name=>"$basedir$t->{'name'}")},
2774                                 "raw");
2775                 print "</td>\n";
2776
2777         } elsif ($t->{'type'} eq "tree") {
2778                 print "<td class=\"list\">";
2779                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2780                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2781                               esc_path($t->{'name'}));
2782                 print "</td>\n";
2783                 print "<td class=\"link\">";
2784                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2785                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2786                               "tree");
2787                 if (defined $hash_base) {
2788                         print " | " .
2789                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2790                                                      file_name=>"$basedir$t->{'name'}")},
2791                                       "history");
2792                 }
2793                 print "</td>\n";
2794         } else {
2795                 # unknown object: we can only present history for it
2796                 # (this includes 'commit' object, i.e. submodule support)
2797                 print "<td class=\"list\">" .
2798                       esc_path($t->{'name'}) .
2799                       "</td>\n";
2800                 print "<td class=\"link\">";
2801                 if (defined $hash_base) {
2802                         print $cgi->a({-href => href(action=>"history",
2803                                                      hash_base=>$hash_base,
2804                                                      file_name=>"$basedir$t->{'name'}")},
2805                                       "history");
2806                 }
2807                 print "</td>\n";
2808         }
2809 }
2810
2811 ## ......................................................................
2812 ## functions printing large fragments of HTML
2813
2814 # get pre-image filenames for merge (combined) diff
2815 sub fill_from_file_info {
2816         my ($diff, @parents) = @_;
2817
2818         $diff->{'from_file'} = [ ];
2819         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2820         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2821                 if ($diff->{'status'}[$i] eq 'R' ||
2822                     $diff->{'status'}[$i] eq 'C') {
2823                         $diff->{'from_file'}[$i] =
2824                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2825                 }
2826         }
2827
2828         return $diff;
2829 }
2830
2831 # is current raw difftree line of file deletion
2832 sub is_deleted {
2833         my $diffinfo = shift;
2834
2835         return $diffinfo->{'status_str'} =~ /D/;
2836 }
2837
2838 # does patch correspond to [previous] difftree raw line
2839 # $diffinfo  - hashref of parsed raw diff format
2840 # $patchinfo - hashref of parsed patch diff format
2841 #              (the same keys as in $diffinfo)
2842 sub is_patch_split {
2843         my ($diffinfo, $patchinfo) = @_;
2844
2845         return defined $diffinfo && defined $patchinfo
2846                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2847 }
2848
2849
2850 sub git_difftree_body {
2851         my ($difftree, $hash, @parents) = @_;
2852         my ($parent) = $parents[0];
2853         my ($have_blame) = gitweb_check_feature('blame');
2854         print "<div class=\"list_head\">\n";
2855         if ($#{$difftree} > 10) {
2856                 print(($#{$difftree} + 1) . " files changed:\n");
2857         }
2858         print "</div>\n";
2859
2860         print "<table class=\"" .
2861               (@parents > 1 ? "combined " : "") .
2862               "diff_tree\">\n";
2863
2864         # header only for combined diff in 'commitdiff' view
2865         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2866         if ($has_header) {
2867                 # table header
2868                 print "<thead><tr>\n" .
2869                        "<th></th><th></th>\n"; # filename, patchN link
2870                 for (my $i = 0; $i < @parents; $i++) {
2871                         my $par = $parents[$i];
2872                         print "<th>" .
2873                               $cgi->a({-href => href(action=>"commitdiff",
2874                                                      hash=>$hash, hash_parent=>$par),
2875                                        -title => 'commitdiff to parent number ' .
2876                                                   ($i+1) . ': ' . substr($par,0,7)},
2877                                       $i+1) .
2878                               "&nbsp;</th>\n";
2879                 }
2880                 print "</tr></thead>\n<tbody>\n";
2881         }
2882
2883         my $alternate = 1;
2884         my $patchno = 0;
2885         foreach my $line (@{$difftree}) {
2886                 my $diff = parsed_difftree_line($line);
2887
2888                 if ($alternate) {
2889                         print "<tr class=\"dark\">\n";
2890                 } else {
2891                         print "<tr class=\"light\">\n";
2892                 }
2893                 $alternate ^= 1;
2894
2895                 if (exists $diff->{'nparents'}) { # combined diff
2896
2897                         fill_from_file_info($diff, @parents)
2898                                 unless exists $diff->{'from_file'};
2899
2900                         if (!is_deleted($diff)) {
2901                                 # file exists in the result (child) commit
2902                                 print "<td>" .
2903                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2904                                                              file_name=>$diff->{'to_file'},
2905                                                              hash_base=>$hash),
2906                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2907                                       "</td>\n";
2908                         } else {
2909                                 print "<td>" .
2910                                       esc_path($diff->{'to_file'}) .
2911                                       "</td>\n";
2912                         }
2913
2914                         if ($action eq 'commitdiff') {
2915                                 # link to patch
2916                                 $patchno++;
2917                                 print "<td class=\"link\">" .
2918                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2919                                       " | " .
2920                                       "</td>\n";
2921                         }
2922
2923                         my $has_history = 0;
2924                         my $not_deleted = 0;
2925                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2926                                 my $hash_parent = $parents[$i];
2927                                 my $from_hash = $diff->{'from_id'}[$i];
2928                                 my $from_path = $diff->{'from_file'}[$i];
2929                                 my $status = $diff->{'status'}[$i];
2930
2931                                 $has_history ||= ($status ne 'A');
2932                                 $not_deleted ||= ($status ne 'D');
2933
2934                                 if ($status eq 'A') {
2935                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2936                                 } elsif ($status eq 'D') {
2937                                         print "<td class=\"link\">" .
2938                                               $cgi->a({-href => href(action=>"blob",
2939                                                                      hash_base=>$hash,
2940                                                                      hash=>$from_hash,
2941                                                                      file_name=>$from_path)},
2942                                                       "blob" . ($i+1)) .
2943                                               " | </td>\n";
2944                                 } else {
2945                                         if ($diff->{'to_id'} eq $from_hash) {
2946                                                 print "<td class=\"link nochange\">";
2947                                         } else {
2948                                                 print "<td class=\"link\">";
2949                                         }
2950                                         print $cgi->a({-href => href(action=>"blobdiff",
2951                                                                      hash=>$diff->{'to_id'},
2952                                                                      hash_parent=>$from_hash,
2953                                                                      hash_base=>$hash,
2954                                                                      hash_parent_base=>$hash_parent,
2955                                                                      file_name=>$diff->{'to_file'},
2956                                                                      file_parent=>$from_path)},
2957                                                       "diff" . ($i+1)) .
2958                                               " | </td>\n";
2959                                 }
2960                         }
2961
2962                         print "<td class=\"link\">";
2963                         if ($not_deleted) {
2964                                 print $cgi->a({-href => href(action=>"blob",
2965                                                              hash=>$diff->{'to_id'},
2966                                                              file_name=>$diff->{'to_file'},
2967                                                              hash_base=>$hash)},
2968                                               "blob");
2969                                 print " | " if ($has_history);
2970                         }
2971                         if ($has_history) {
2972                                 print $cgi->a({-href => href(action=>"history",
2973                                                              file_name=>$diff->{'to_file'},
2974                                                              hash_base=>$hash)},
2975                                               "history");
2976                         }
2977                         print "</td>\n";
2978
2979                         print "</tr>\n";
2980                         next; # instead of 'else' clause, to avoid extra indent
2981                 }
2982                 # else ordinary diff
2983
2984                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2985                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2986                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2987                         $to_mode_oct = oct $diff->{'to_mode'};
2988                         if (S_ISREG($to_mode_oct)) { # only for regular file
2989                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2990                         }
2991                         $to_file_type = file_type($diff->{'to_mode'});
2992                 }
2993                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2994                         $from_mode_oct = oct $diff->{'from_mode'};
2995                         if (S_ISREG($to_mode_oct)) { # only for regular file
2996                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2997                         }
2998                         $from_file_type = file_type($diff->{'from_mode'});
2999                 }
3000
3001                 if ($diff->{'status'} eq "A") { # created
3002                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3003                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3004                         $mode_chng   .= "]</span>";
3005                         print "<td>";
3006                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3007                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3008                                       -class => "list"}, esc_path($diff->{'file'}));
3009                         print "</td>\n";
3010                         print "<td>$mode_chng</td>\n";
3011                         print "<td class=\"link\">";
3012                         if ($action eq 'commitdiff') {
3013                                 # link to patch
3014                                 $patchno++;
3015                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3016                                 print " | ";
3017                         }
3018                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3019                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3020                                       "blob");
3021                         print "</td>\n";
3022
3023                 } elsif ($diff->{'status'} eq "D") { # deleted
3024                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3025                         print "<td>";
3026                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3027                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3028                                        -class => "list"}, esc_path($diff->{'file'}));
3029                         print "</td>\n";
3030                         print "<td>$mode_chng</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                                 print " | ";
3037                         }
3038                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3039                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3040                                       "blob") . " | ";
3041                         if ($have_blame) {
3042                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3043                                                              file_name=>$diff->{'file'})},
3044                                               "blame") . " | ";
3045                         }
3046                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3047                                                      file_name=>$diff->{'file'})},
3048                                       "history");
3049                         print "</td>\n";
3050
3051                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3052                         my $mode_chnge = "";
3053                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3054                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3055                                 if ($from_file_type ne $to_file_type) {
3056                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3057                                 }
3058                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3059                                         if ($from_mode_str && $to_mode_str) {
3060                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3061                                         } elsif ($to_mode_str) {
3062                                                 $mode_chnge .= " mode: $to_mode_str";
3063                                         }
3064                                 }
3065                                 $mode_chnge .= "]</span>\n";
3066                         }
3067                         print "<td>";
3068                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3069                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3070                                       -class => "list"}, esc_path($diff->{'file'}));
3071                         print "</td>\n";
3072                         print "<td>$mode_chnge</td>\n";
3073                         print "<td class=\"link\">";
3074                         if ($action eq 'commitdiff') {
3075                                 # link to patch
3076                                 $patchno++;
3077                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3078                                       " | ";
3079                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3080                                 # "commit" view and modified file (not onlu mode changed)
3081                                 print $cgi->a({-href => href(action=>"blobdiff",
3082                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3083                                                              hash_base=>$hash, hash_parent_base=>$parent,
3084                                                              file_name=>$diff->{'file'})},
3085                                               "diff") .
3086                                       " | ";
3087                         }
3088                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3089                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3090                                        "blob") . " | ";
3091                         if ($have_blame) {
3092                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3093                                                              file_name=>$diff->{'file'})},
3094                                               "blame") . " | ";
3095                         }
3096                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3097                                                      file_name=>$diff->{'file'})},
3098                                       "history");
3099                         print "</td>\n";
3100
3101                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3102                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3103                         my $nstatus = $status_name{$diff->{'status'}};
3104                         my $mode_chng = "";
3105                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3106                                 # mode also for directories, so we cannot use $to_mode_str
3107                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3108                         }
3109                         print "<td>" .
3110                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3111                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3112                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3113                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3114                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3115                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3116                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3117                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3118                               "<td class=\"link\">";
3119                         if ($action eq 'commitdiff') {
3120                                 # link to patch
3121                                 $patchno++;
3122                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3123                                       " | ";
3124                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3125                                 # "commit" view and modified file (not only pure rename or copy)
3126                                 print $cgi->a({-href => href(action=>"blobdiff",
3127                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3128                                                              hash_base=>$hash, hash_parent_base=>$parent,
3129                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3130                                               "diff") .
3131                                       " | ";
3132                         }
3133                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3134                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3135                                       "blob") . " | ";
3136                         if ($have_blame) {
3137                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3138                                                              file_name=>$diff->{'to_file'})},
3139                                               "blame") . " | ";
3140                         }
3141                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3142                                                     file_name=>$diff->{'to_file'})},
3143                                       "history");
3144                         print "</td>\n";
3145
3146                 } # we should not encounter Unmerged (U) or Unknown (X) status
3147                 print "</tr>\n";
3148         }
3149         print "</tbody>" if $has_header;
3150         print "</table>\n";
3151 }
3152
3153 sub git_patchset_body {
3154         my ($fd, $difftree, $hash, @hash_parents) = @_;
3155         my ($hash_parent) = $hash_parents[0];
3156
3157         my $is_combined = (@hash_parents > 1);
3158         my $patch_idx = 0;
3159         my $patch_number = 0;
3160         my $patch_line;
3161         my $diffinfo;
3162         my $to_name;
3163         my (%from, %to);
3164
3165         print "<div class=\"patchset\">\n";
3166
3167         # skip to first patch
3168         while ($patch_line = <$fd>) {
3169                 chomp $patch_line;
3170
3171                 last if ($patch_line =~ m/^diff /);
3172         }
3173
3174  PATCH:
3175         while ($patch_line) {
3176
3177                 # parse "git diff" header line
3178                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3179                         # $1 is from_name, which we do not use
3180                         $to_name = unquote($2);
3181                         $to_name =~ s!^b/!!;
3182                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3183                         # $1 is 'cc' or 'combined', which we do not use
3184                         $to_name = unquote($2);
3185                 } else {
3186                         $to_name = undef;
3187                 }
3188
3189                 # check if current patch belong to current raw line
3190                 # and parse raw git-diff line if needed
3191                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3192                         # this is continuation of a split patch
3193                         print "<div class=\"patch cont\">\n";
3194                 } else {
3195                         # advance raw git-diff output if needed
3196                         $patch_idx++ if defined $diffinfo;
3197
3198                         # read and prepare patch information
3199                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3200
3201                         # compact combined diff output can have some patches skipped
3202                         # find which patch (using pathname of result) we are at now;
3203                         if ($is_combined) {
3204                                 while ($to_name ne $diffinfo->{'to_file'}) {
3205                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3206                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3207                                               "</div>\n";  # class="patch"
3208
3209                                         $patch_idx++;
3210                                         $patch_number++;
3211
3212                                         last if $patch_idx > $#$difftree;
3213                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3214                                 }
3215                         }
3216
3217                         # modifies %from, %to hashes
3218                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3219
3220                         # this is first patch for raw difftree line with $patch_idx index
3221                         # we index @$difftree array from 0, but number patches from 1
3222                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3223                 }
3224
3225                 # git diff header
3226                 #assert($patch_line =~ m/^diff /) if DEBUG;
3227                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3228                 $patch_number++;
3229                 # print "git diff" header
3230                 print format_git_diff_header_line($patch_line, $diffinfo,
3231                                                   \%from, \%to);
3232
3233                 # print extended diff header
3234                 print "<div class=\"diff extended_header\">\n";
3235         EXTENDED_HEADER:
3236                 while ($patch_line = <$fd>) {
3237                         chomp $patch_line;
3238
3239                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3240
3241                         print format_extended_diff_header_line($patch_line, $diffinfo,
3242                                                                \%from, \%to);
3243                 }
3244                 print "</div>\n"; # class="diff extended_header"
3245
3246                 # from-file/to-file diff header
3247                 if (! $patch_line) {
3248                         print "</div>\n"; # class="patch"
3249                         last PATCH;
3250                 }
3251                 next PATCH if ($patch_line =~ m/^diff /);
3252                 #assert($patch_line =~ m/^---/) if DEBUG;
3253
3254                 my $last_patch_line = $patch_line;
3255                 $patch_line = <$fd>;
3256                 chomp $patch_line;
3257                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3258
3259                 print format_diff_from_to_header($last_patch_line, $patch_line,
3260                                                  $diffinfo, \%from, \%to,
3261                                                  @hash_parents);
3262
3263                 # the patch itself
3264         LINE:
3265                 while ($patch_line = <$fd>) {
3266                         chomp $patch_line;
3267
3268                         next PATCH if ($patch_line =~ m/^diff /);
3269
3270                         print format_diff_line($patch_line, \%from, \%to);
3271                 }
3272
3273         } continue {
3274                 print "</div>\n"; # class="patch"
3275         }
3276
3277         # for compact combined (--cc) format, with chunk and patch simpliciaction
3278         # patchset might be empty, but there might be unprocessed raw lines
3279         for (++$patch_idx if $patch_number > 0;
3280              $patch_idx < @$difftree;
3281              ++$patch_idx) {
3282                 # read and prepare patch information
3283                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3284
3285                 # generate anchor for "patch" links in difftree / whatchanged part
3286                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3287                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3288                       "</div>\n";  # class="patch"
3289
3290                 $patch_number++;
3291         }
3292
3293         if ($patch_number == 0) {
3294                 if (@hash_parents > 1) {
3295                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3296                 } else {
3297                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3298                 }
3299         }
3300
3301         print "</div>\n"; # class="patchset"
3302 }
3303
3304 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3305
3306 sub git_project_list_body {
3307         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3308
3309         my ($check_forks) = gitweb_check_feature('forks');
3310
3311         my @projects;
3312         foreach my $pr (@$projlist) {
3313                 my (@aa) = git_get_last_activity($pr->{'path'});
3314                 unless (@aa) {
3315                         next;
3316                 }
3317                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3318                 if (!defined $pr->{'descr'}) {
3319                         my $descr = git_get_project_description($pr->{'path'}) || "";
3320                         $pr->{'descr_long'} = to_utf8($descr);
3321                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3322                 }
3323                 if (!defined $pr->{'owner'}) {
3324                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3325                 }
3326                 if ($check_forks) {
3327                         my $pname = $pr->{'path'};
3328                         if (($pname =~ s/\.git$//) &&
3329                             ($pname !~ /\/$/) &&
3330                             (-d "$projectroot/$pname")) {
3331                                 $pr->{'forks'} = "-d $projectroot/$pname";
3332                         }
3333                         else {
3334                                 $pr->{'forks'} = 0;
3335                         }
3336                 }
3337                 push @projects, $pr;
3338         }
3339
3340         $order ||= $default_projects_order;
3341         $from = 0 unless defined $from;
3342         $to = $#projects if (!defined $to || $#projects < $to);
3343
3344         print "<table class=\"project_list\">\n";
3345         unless ($no_header) {
3346                 print "<tr>\n";
3347                 if ($check_forks) {
3348                         print "<th></th>\n";
3349                 }
3350                 if ($order eq "project") {
3351                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3352                         print "<th>Project</th>\n";
3353                 } else {
3354                         print "<th>" .
3355                               $cgi->a({-href => href(project=>undef, order=>'project'),
3356                                        -class => "header"}, "Project") .
3357                               "</th>\n";
3358                 }
3359                 if ($order eq "descr") {
3360                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3361                         print "<th>Description</th>\n";
3362                 } else {
3363                         print "<th>" .
3364                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3365                                        -class => "header"}, "Description") .
3366                               "</th>\n";
3367                 }
3368                 if ($order eq "owner") {
3369                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3370                         print "<th>Owner</th>\n";
3371                 } else {
3372                         print "<th>" .
3373                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3374                                        -class => "header"}, "Owner") .
3375                               "</th>\n";
3376                 }
3377                 if ($order eq "age") {
3378                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3379                         print "<th>Last Change</th>\n";
3380                 } else {
3381                         print "<th>" .
3382                               $cgi->a({-href => href(project=>undef, order=>'age'),
3383                                        -class => "header"}, "Last Change") .
3384                               "</th>\n";
3385                 }
3386                 print "<th></th>\n" .
3387                       "</tr>\n";
3388         }
3389         my $alternate = 1;
3390         for (my $i = $from; $i <= $to; $i++) {
3391                 my $pr = $projects[$i];
3392                 if ($alternate) {
3393                         print "<tr class=\"dark\">\n";
3394                 } else {
3395                         print "<tr class=\"light\">\n";
3396                 }
3397                 $alternate ^= 1;
3398                 if ($check_forks) {
3399                         print "<td>";
3400                         if ($pr->{'forks'}) {
3401                                 print "<!-- $pr->{'forks'} -->\n";
3402                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3403                         }
3404                         print "</td>\n";
3405                 }
3406                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3407                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3408                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3409                                         -class => "list", -title => $pr->{'descr_long'}},
3410                                         esc_html($pr->{'descr'})) . "</td>\n" .
3411                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3412                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3413                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3414                       "<td class=\"link\">" .
3415                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3416                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3417                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3418                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3419                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3420                       "</td>\n" .
3421                       "</tr>\n";
3422         }
3423         if (defined $extra) {
3424                 print "<tr>\n";
3425                 if ($check_forks) {
3426                         print "<td></td>\n";
3427                 }
3428                 print "<td colspan=\"5\">$extra</td>\n" .
3429                       "</tr>\n";
3430         }
3431         print "</table>\n";
3432 }
3433
3434 sub git_shortlog_body {
3435         # uses global variable $project
3436         my ($commitlist, $from, $to, $refs, $extra) = @_;
3437
3438         $from = 0 unless defined $from;
3439         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3440
3441         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3442         my $alternate = 1;
3443         for (my $i = $from; $i <= $to; $i++) {
3444                 my %co = %{$commitlist->[$i]};
3445                 my $commit = $co{'id'};
3446                 my $ref = format_ref_marker($refs, $commit);
3447                 if ($alternate) {
3448                         print "<tr class=\"dark\">\n";
3449                 } else {
3450                         print "<tr class=\"light\">\n";
3451                 }
3452                 $alternate ^= 1;
3453                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3454                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3455                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3456                       "<td><i>" . $author . "</i></td>\n" .
3457                       "<td>";
3458                 print format_subject_html($co{'title'}, $co{'title_short'},
3459                                           href(action=>"commit", hash=>$commit), $ref);
3460                 print "</td>\n" .
3461                       "<td class=\"link\">" .
3462                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3463                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3464                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3465                 my $snapshot_links = format_snapshot_links($commit);
3466                 if (defined $snapshot_links) {
3467                         print " | " . $snapshot_links;
3468                 }
3469                 print "</td>\n" .
3470                       "</tr>\n";
3471         }
3472         if (defined $extra) {
3473                 print "<tr>\n" .
3474                       "<td colspan=\"4\">$extra</td>\n" .
3475                       "</tr>\n";
3476         }
3477         print "</table>\n";
3478 }
3479
3480 sub git_history_body {
3481         # Warning: assumes constant type (blob or tree) during history
3482         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3483
3484         $from = 0 unless defined $from;
3485         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3486
3487         print "<table class=\"history\" cellspacing=\"0\">\n";
3488         my $alternate = 1;
3489         for (my $i = $from; $i <= $to; $i++) {
3490                 my %co = %{$commitlist->[$i]};
3491                 if (!%co) {
3492                         next;
3493                 }
3494                 my $commit = $co{'id'};
3495
3496                 my $ref = format_ref_marker($refs, $commit);
3497
3498                 if ($alternate) {
3499                         print "<tr class=\"dark\">\n";
3500                 } else {
3501                         print "<tr class=\"light\">\n";
3502                 }
3503                 $alternate ^= 1;
3504         # shortlog uses      chop_str($co{'author_name'}, 10)
3505                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3506                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3507                       "<td><i>" . $author . "</i></td>\n" .
3508                       "<td>";
3509                 # originally git_history used chop_str($co{'title'}, 50)
3510                 print format_subject_html($co{'title'}, $co{'title_short'},
3511                                           href(action=>"commit", hash=>$commit), $ref);
3512                 print "</td>\n" .
3513                       "<td class=\"link\">" .
3514                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3515                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3516
3517                 if ($ftype eq 'blob') {
3518                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3519                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3520                         if (defined $blob_current && defined $blob_parent &&
3521                                         $blob_current ne $blob_parent) {
3522                                 print " | " .
3523                                         $cgi->a({-href => href(action=>"blobdiff",
3524                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3525                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3526                                                                file_name=>$file_name)},
3527                                                 "diff to current");
3528                         }
3529                 }
3530                 print "</td>\n" .
3531                       "</tr>\n";
3532         }
3533         if (defined $extra) {
3534                 print "<tr>\n" .
3535                       "<td colspan=\"4\">$extra</td>\n" .
3536                       "</tr>\n";
3537         }
3538         print "</table>\n";
3539 }
3540
3541 sub git_tags_body {
3542         # uses global variable $project
3543         my ($taglist, $from, $to, $extra) = @_;
3544         $from = 0 unless defined $from;
3545         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3546
3547         print "<table class=\"tags\" cellspacing=\"0\">\n";
3548         my $alternate = 1;
3549         for (my $i = $from; $i <= $to; $i++) {
3550                 my $entry = $taglist->[$i];
3551                 my %tag = %$entry;
3552                 my $comment = $tag{'subject'};
3553                 my $comment_short;
3554                 if (defined $comment) {
3555                         $comment_short = chop_str($comment, 30, 5);
3556                 }
3557                 if ($alternate) {
3558                         print "<tr class=\"dark\">\n";
3559                 } else {
3560                         print "<tr class=\"light\">\n";
3561                 }
3562                 $alternate ^= 1;
3563                 if (defined $tag{'age'}) {
3564                         print "<td><i>$tag{'age'}</i></td>\n";
3565                 } else {
3566                         print "<td></td>\n";
3567                 }
3568                 print "<td>" .
3569                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3570                                -class => "list name"}, esc_html($tag{'name'})) .
3571                       "</td>\n" .
3572                       "<td>";
3573                 if (defined $comment) {
3574                         print format_subject_html($comment, $comment_short,
3575                                                   href(action=>"tag", hash=>$tag{'id'}));
3576                 }
3577                 print "</td>\n" .
3578                       "<td class=\"selflink\">";
3579                 if ($tag{'type'} eq "tag") {
3580                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3581                 } else {
3582                         print "&nbsp;";
3583                 }
3584                 print "</td>\n" .
3585                       "<td class=\"link\">" . " | " .
3586                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3587                 if ($tag{'reftype'} eq "commit") {
3588                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3589                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3590                 } elsif ($tag{'reftype'} eq "blob") {
3591                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3592                 }
3593                 print "</td>\n" .
3594                       "</tr>";
3595         }
3596         if (defined $extra) {
3597                 print "<tr>\n" .
3598                       "<td colspan=\"5\">$extra</td>\n" .
3599                       "</tr>\n";
3600         }
3601         print "</table>\n";
3602 }
3603
3604 sub git_heads_body {
3605         # uses global variable $project
3606         my ($headlist, $head, $from, $to, $extra) = @_;
3607         $from = 0 unless defined $from;
3608         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3609
3610         print "<table class=\"heads\" cellspacing=\"0\">\n";
3611         my $alternate = 1;
3612         for (my $i = $from; $i <= $to; $i++) {
3613                 my $entry = $headlist->[$i];
3614                 my %ref = %$entry;
3615                 my $curr = $ref{'id'} eq $head;
3616                 if ($alternate) {
3617                         print "<tr class=\"dark\">\n";
3618                 } else {
3619                         print "<tr class=\"light\">\n";
3620                 }
3621                 $alternate ^= 1;
3622                 print "<td><i>$ref{'age'}</i></td>\n" .
3623                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3624                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3625                                -class => "list name"},esc_html($ref{'name'})) .
3626                       "</td>\n" .
3627                       "<td class=\"link\">" .
3628                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3629                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3630                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3631                       "</td>\n" .
3632                       "</tr>";
3633         }
3634         if (defined $extra) {
3635                 print "<tr>\n" .
3636                       "<td colspan=\"3\">$extra</td>\n" .
3637                       "</tr>\n";
3638         }
3639         print "</table>\n";
3640 }
3641
3642 sub git_search_grep_body {
3643         my ($commitlist, $from, $to, $extra) = @_;
3644         $from = 0 unless defined $from;
3645         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3646
3647         print "<table class=\"grep\" cellspacing=\"0\">\n";
3648         my $alternate = 1;
3649         for (my $i = $from; $i <= $to; $i++) {
3650                 my %co = %{$commitlist->[$i]};
3651                 if (!%co) {
3652                         next;
3653                 }
3654                 my $commit = $co{'id'};
3655                 if ($alternate) {
3656                         print "<tr class=\"dark\">\n";
3657                 } else {
3658                         print "<tr class=\"light\">\n";
3659                 }
3660                 $alternate ^= 1;
3661                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3662                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3663                       "<td><i>" . $author . "</i></td>\n" .
3664                       "<td>" .
3665                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3666                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3667                 my $comment = $co{'comment'};
3668                 foreach my $line (@$comment) {
3669                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3670                                 my $lead = esc_html($1) || "";
3671                                 $lead = chop_str($lead, 30, 10);
3672                                 my $match = esc_html($2) || "";
3673                                 my $trail = esc_html($3) || "";
3674                                 $trail = chop_str($trail, 30, 10);
3675                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3676                                 print chop_str($text, 80, 5) . "<br/>\n";
3677                         }
3678                 }
3679                 print "</td>\n" .
3680                       "<td class=\"link\">" .
3681                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3682                       " | " .
3683                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3684                 print "</td>\n" .
3685                       "</tr>\n";
3686         }
3687         if (defined $extra) {
3688                 print "<tr>\n" .
3689                       "<td colspan=\"3\">$extra</td>\n" .
3690                       "</tr>\n";
3691         }
3692         print "</table>\n";
3693 }
3694
3695 ## ======================================================================
3696 ## ======================================================================
3697 ## actions
3698
3699 sub git_project_list {
3700         my $order = $cgi->param('o');
3701         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3702                 die_error(undef, "Unknown order parameter");
3703         }
3704
3705         my @list = git_get_projects_list();
3706         if (!@list) {
3707                 die_error(undef, "No projects found");
3708         }
3709
3710         git_header_html();
3711         if (-f $home_text) {
3712                 print "<div class=\"index_include\">\n";
3713                 open (my $fd, $home_text);
3714                 print <$fd>;
3715                 close $fd;
3716                 print "</div>\n";
3717         }
3718         git_project_list_body(\@list, $order);
3719         git_footer_html();
3720 }
3721
3722 sub git_forks {
3723         my $order = $cgi->param('o');
3724         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3725                 die_error(undef, "Unknown order parameter");
3726         }
3727
3728         my @list = git_get_projects_list($project);
3729         if (!@list) {
3730                 die_error(undef, "No forks found");
3731         }
3732
3733         git_header_html();
3734         git_print_page_nav('','');
3735         git_print_header_div('summary', "$project forks");
3736         git_project_list_body(\@list, $order);
3737         git_footer_html();
3738 }
3739
3740 sub git_project_index {
3741         my @projects = git_get_projects_list($project);
3742
3743         print $cgi->header(
3744                 -type => 'text/plain',
3745                 -charset => 'utf-8',
3746                 -content_disposition => 'inline; filename="index.aux"');
3747
3748         foreach my $pr (@projects) {
3749                 if (!exists $pr->{'owner'}) {
3750                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3751                 }
3752
3753                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3754                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3755                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3756                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3757                 $path  =~ s/ /\+/g;
3758                 $owner =~ s/ /\+/g;
3759
3760                 print "$path $owner\n";
3761         }
3762 }
3763
3764 sub git_summary {
3765         my $descr = git_get_project_description($project) || "none";
3766         my %co = parse_commit("HEAD");
3767         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3768         my $head = $co{'id'};
3769
3770         my $owner = git_get_project_owner($project);
3771
3772         my $refs = git_get_references();
3773         # These get_*_list functions return one more to allow us to see if
3774         # there are more ...
3775         my @taglist  = git_get_tags_list(16);
3776         my @headlist = git_get_heads_list(16);
3777         my @forklist;
3778         my ($check_forks) = gitweb_check_feature('forks');
3779
3780         if ($check_forks) {
3781                 @forklist = git_get_projects_list($project);
3782         }
3783
3784         git_header_html();
3785         git_print_page_nav('summary','', $head);
3786
3787         print "<div class=\"title\">&nbsp;</div>\n";
3788         print "<table cellspacing=\"0\">\n" .
3789               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3790               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3791         if (defined $cd{'rfc2822'}) {
3792                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3793         }
3794
3795         # use per project git URL list in $projectroot/$project/cloneurl
3796         # or make project git URL from git base URL and project name
3797         my $url_tag = "URL";
3798         my @url_list = git_get_project_url_list($project);
3799         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3800         foreach my $git_url (@url_list) {
3801                 next unless $git_url;
3802                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3803                 $url_tag = "";
3804         }
3805         print "</table>\n";
3806
3807         if (-s "$projectroot/$project/README.html") {
3808                 if (open my $fd, "$projectroot/$project/README.html") {
3809                         print "<div class=\"title\">readme</div>\n";
3810                         print $_ while (<$fd>);
3811                         close $fd;
3812                 }
3813         }
3814
3815         # we need to request one more than 16 (0..15) to check if
3816         # those 16 are all
3817         my @commitlist = $head ? parse_commits($head, 17) : ();
3818         if (@commitlist) {
3819                 git_print_header_div('shortlog');
3820                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3821                                   $#commitlist <=  15 ? undef :
3822                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3823         }
3824
3825         if (@taglist) {
3826                 git_print_header_div('tags');
3827                 git_tags_body(\@taglist, 0, 15,
3828                               $#taglist <=  15 ? undef :
3829                               $cgi->a({-href => href(action=>"tags")}, "..."));
3830         }
3831
3832         if (@headlist) {
3833                 git_print_header_div('heads');
3834                 git_heads_body(\@headlist, $head, 0, 15,
3835                                $#headlist <= 15 ? undef :
3836                                $cgi->a({-href => href(action=>"heads")}, "..."));
3837         }
3838
3839         if (@forklist) {
3840                 git_print_header_div('forks');
3841                 git_project_list_body(\@forklist, undef, 0, 15,
3842                                       $#forklist <= 15 ? undef :
3843                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3844                                       'noheader');
3845         }
3846
3847         git_footer_html();
3848 }
3849
3850 sub git_tag {
3851         my $head = git_get_head_hash($project);
3852         git_header_html();
3853         git_print_page_nav('','', $head,undef,$head);
3854         my %tag = parse_tag($hash);
3855
3856         if (! %tag) {
3857                 die_error(undef, "Unknown tag object");
3858         }
3859
3860         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3861         print "<div class=\"title_text\">\n" .
3862               "<table cellspacing=\"0\">\n" .
3863               "<tr>\n" .
3864               "<td>object</td>\n" .
3865               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3866                                $tag{'object'}) . "</td>\n" .
3867               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3868                                               $tag{'type'}) . "</td>\n" .
3869               "</tr>\n";
3870         if (defined($tag{'author'})) {
3871                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3872                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3873                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3874                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3875                         "</td></tr>\n";
3876         }
3877         print "</table>\n\n" .
3878               "</div>\n";
3879         print "<div class=\"page_body\">";
3880         my $comment = $tag{'comment'};
3881         foreach my $line (@$comment) {
3882                 chomp $line;
3883                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3884         }
3885         print "</div>\n";
3886         git_footer_html();
3887 }
3888
3889 sub git_blame2 {
3890         my $fd;
3891         my $ftype;
3892
3893         my ($have_blame) = gitweb_check_feature('blame');
3894         if (!$have_blame) {
3895                 die_error('403 Permission denied', "Permission denied");
3896         }
3897         die_error('404 Not Found', "File name not defined") if (!$file_name);
3898         $hash_base ||= git_get_head_hash($project);
3899         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3900         my %co = parse_commit($hash_base)
3901                 or die_error(undef, "Reading commit failed");
3902         if (!defined $hash) {
3903                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3904                         or die_error(undef, "Error looking up file");
3905         }
3906         $ftype = git_get_type($hash);
3907         if ($ftype !~ "blob") {
3908                 die_error('400 Bad Request', "Object is not a blob");
3909         }
3910         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3911               $file_name, $hash_base)
3912                 or die_error(undef, "Open git-blame failed");
3913         git_header_html();
3914         my $formats_nav =
3915                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3916                         "blob") .
3917                 " | " .
3918                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3919                         "history") .
3920                 " | " .
3921                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3922                         "HEAD");
3923         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3924         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3925         git_print_page_path($file_name, $ftype, $hash_base);
3926         my @rev_color = (qw(light2 dark2));
3927         my $num_colors = scalar(@rev_color);
3928         my $current_color = 0;
3929         my $last_rev;
3930         print <<HTML;
3931 <div class="page_body">
3932 <table class="blame">
3933 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3934 HTML
3935         my %metainfo = ();
3936         while (1) {
3937                 $_ = <$fd>;
3938                 last unless defined $_;
3939                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3940                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3941                 if (!exists $metainfo{$full_rev}) {
3942                         $metainfo{$full_rev} = {};
3943                 }
3944                 my $meta = $metainfo{$full_rev};
3945                 while (<$fd>) {
3946                         last if (s/^\t//);
3947                         if (/^(\S+) (.*)$/) {
3948                                 $meta->{$1} = $2;
3949                         }
3950                 }
3951                 my $data = $_;
3952                 chomp $data;
3953                 my $rev = substr($full_rev, 0, 8);
3954                 my $author = $meta->{'author'};
3955                 my %date = parse_date($meta->{'author-time'},
3956                                       $meta->{'author-tz'});
3957                 my $date = $date{'iso-tz'};
3958                 if ($group_size) {
3959                         $current_color = ++$current_color % $num_colors;
3960                 }
3961                 print "<tr class=\"$rev_color[$current_color]\">\n";
3962                 if ($group_size) {
3963                         print "<td class=\"sha1\"";
3964                         print " title=\"". esc_html($author) . ", $date\"";
3965                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3966                         print ">";
3967                         print $cgi->a({-href => href(action=>"commit",
3968                                                      hash=>$full_rev,
3969                                                      file_name=>$file_name)},
3970                                       esc_html($rev));
3971                         print "</td>\n";
3972                 }
3973                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3974                         or die_error(undef, "Open git-rev-parse failed");
3975                 my $parent_commit = <$dd>;
3976                 close $dd;
3977                 chomp($parent_commit);
3978                 my $blamed = href(action => 'blame',
3979                                   file_name => $meta->{'filename'},
3980                                   hash_base => $parent_commit);
3981                 print "<td class=\"linenr\">";
3982                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3983                                 -id => "l$lineno",
3984                                 -class => "linenr" },
3985                               esc_html($lineno));
3986                 print "</td>";
3987                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3988                 print "</tr>\n";
3989         }
3990         print "</table>\n";
3991         print "</div>";
3992         close $fd
3993                 or print "Reading blob failed\n";
3994         git_footer_html();
3995 }
3996
3997 sub git_blame {
3998         my $fd;
3999
4000         my ($have_blame) = gitweb_check_feature('blame');
4001         if (!$have_blame) {
4002                 die_error('403 Permission denied', "Permission denied");
4003         }
4004         die_error('404 Not Found', "File name not defined") if (!$file_name);
4005         $hash_base ||= git_get_head_hash($project);
4006         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4007         my %co = parse_commit($hash_base)
4008                 or die_error(undef, "Reading commit failed");
4009         if (!defined $hash) {
4010                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4011                         or die_error(undef, "Error lookup file");
4012         }
4013         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4014                 or die_error(undef, "Open git-annotate failed");
4015         git_header_html();
4016         my $formats_nav =
4017                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4018                         "blob") .
4019                 " | " .
4020                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4021                         "history") .
4022                 " | " .
4023                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4024                         "HEAD");
4025         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4026         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4027         git_print_page_path($file_name, 'blob', $hash_base);
4028         print "<div class=\"page_body\">\n";
4029         print <<HTML;
4030 <table class="blame">
4031   <tr>
4032     <th>Commit</th>
4033     <th>Age</th>
4034     <th>Author</th>
4035     <th>Line</th>
4036     <th>Data</th>
4037   </tr>
4038 HTML
4039         my @line_class = (qw(light dark));
4040         my $line_class_len = scalar (@line_class);
4041         my $line_class_num = $#line_class;
4042         while (my $line = <$fd>) {
4043                 my $long_rev;
4044                 my $short_rev;
4045                 my $author;
4046                 my $time;
4047                 my $lineno;
4048                 my $data;
4049                 my $age;
4050                 my $age_str;
4051                 my $age_class;
4052
4053                 chomp $line;
4054                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4055
4056                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4057                         $long_rev = $1;
4058                         $author   = $2;
4059                         $time     = $3;
4060                         $lineno   = $4;
4061                         $data     = $5;
4062                 } else {
4063                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4064                         next;
4065                 }
4066                 $short_rev  = substr ($long_rev, 0, 8);
4067                 $age        = time () - $time;
4068                 $age_str    = age_string ($age);
4069                 $age_str    =~ s/ /&nbsp;/g;
4070                 $age_class  = age_class($age);
4071                 $author     = esc_html ($author);
4072                 $author     =~ s/ /&nbsp;/g;
4073
4074                 $data = untabify($data);
4075                 $data = esc_html ($data);
4076
4077                 print <<HTML;
4078   <tr class="$line_class[$line_class_num]">
4079     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4080     <td class="$age_class">$age_str</td>
4081     <td>$author</td>
4082     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4083     <td class="pre">$data</td>
4084   </tr>
4085 HTML
4086         } # while (my $line = <$fd>)
4087         print "</table>\n\n";
4088         close $fd
4089                 or print "Reading blob failed.\n";
4090         print "</div>";
4091         git_footer_html();
4092 }
4093
4094 sub git_tags {
4095         my $head = git_get_head_hash($project);
4096         git_header_html();
4097         git_print_page_nav('','', $head,undef,$head);
4098         git_print_header_div('summary', $project);
4099
4100         my @tagslist = git_get_tags_list();
4101         if (@tagslist) {
4102                 git_tags_body(\@tagslist);
4103         }
4104         git_footer_html();
4105 }
4106
4107 sub git_heads {
4108         my $head = git_get_head_hash($project);
4109         git_header_html();
4110         git_print_page_nav('','', $head,undef,$head);
4111         git_print_header_div('summary', $project);
4112
4113         my @headslist = git_get_heads_list();
4114         if (@headslist) {
4115                 git_heads_body(\@headslist, $head);
4116         }
4117         git_footer_html();
4118 }
4119
4120 sub git_blob_plain {
4121         my $expires;
4122
4123         if (!defined $hash) {
4124                 if (defined $file_name) {
4125                         my $base = $hash_base || git_get_head_hash($project);
4126                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4127                                 or die_error(undef, "Error lookup file");
4128                 } else {
4129                         die_error(undef, "No file name defined");
4130                 }
4131         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4132                 # blobs defined by non-textual hash id's can be cached
4133                 $expires = "+1d";
4134         }
4135
4136         my $type = shift;
4137         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4138                 or die_error(undef, "Couldn't cat $file_name, $hash");
4139
4140         $type ||= blob_mimetype($fd, $file_name);
4141
4142         # save as filename, even when no $file_name is given
4143         my $save_as = "$hash";
4144         if (defined $file_name) {
4145                 $save_as = $file_name;
4146         } elsif ($type =~ m/^text\//) {
4147                 $save_as .= '.txt';
4148         }
4149
4150         print $cgi->header(
4151                 -type => "$type",
4152                 -expires=>$expires,
4153                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4154         undef $/;
4155         binmode STDOUT, ':raw';
4156         print <$fd>;
4157         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4158         $/ = "\n";
4159         close $fd;
4160 }
4161
4162 sub git_blob {
4163         my $expires;
4164
4165         if (!defined $hash) {
4166                 if (defined $file_name) {
4167                         my $base = $hash_base || git_get_head_hash($project);
4168                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4169                                 or die_error(undef, "Error lookup file");
4170                 } else {
4171                         die_error(undef, "No file name defined");
4172                 }
4173         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4174                 # blobs defined by non-textual hash id's can be cached
4175                 $expires = "+1d";
4176         }
4177
4178         my ($have_blame) = gitweb_check_feature('blame');
4179         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4180                 or die_error(undef, "Couldn't cat $file_name, $hash");
4181         my $mimetype = blob_mimetype($fd, $file_name);
4182         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4183                 close $fd;
4184                 return git_blob_plain($mimetype);
4185         }
4186         # we can have blame only for text/* mimetype
4187         $have_blame &&= ($mimetype =~ m!^text/!);
4188
4189         git_header_html(undef, $expires);
4190         my $formats_nav = '';
4191         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4192                 if (defined $file_name) {
4193                         if ($have_blame) {
4194                                 $formats_nav .=
4195                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4196                                                                hash=>$hash, file_name=>$file_name)},
4197                                                 "blame") .
4198                                         " | ";
4199                         }
4200                         $formats_nav .=
4201                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4202                                                        hash=>$hash, file_name=>$file_name)},
4203                                         "history") .
4204                                 " | " .
4205                                 $cgi->a({-href => href(action=>"blob_plain",
4206                                                        hash=>$hash, file_name=>$file_name)},
4207                                         "raw") .
4208                                 " | " .
4209                                 $cgi->a({-href => href(action=>"blob",
4210                                                        hash_base=>"HEAD", file_name=>$file_name)},
4211                                         "HEAD");
4212                 } else {
4213                         $formats_nav .=
4214                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4215                 }
4216                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4217                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4218         } else {
4219                 print "<div class=\"page_nav\">\n" .
4220                       "<br/><br/></div>\n" .
4221                       "<div class=\"title\">$hash</div>\n";
4222         }
4223         git_print_page_path($file_name, "blob", $hash_base);
4224         print "<div class=\"page_body\">\n";
4225         if ($mimetype =~ m!^text/!) {
4226                 my $nr;
4227                 while (my $line = <$fd>) {
4228                         chomp $line;
4229                         $nr++;
4230                         $line = untabify($line);
4231                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4232                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4233                 }
4234         } elsif ($mimetype =~ m!^image/!) {
4235                 print qq!<img type="$mimetype"!;
4236                 if ($file_name) {
4237                         print qq! alt="$file_name" title="$file_name"!;
4238                 }
4239                 print qq! src="! .
4240                       href(action=>"blob_plain", hash=>$hash,
4241                            hash_base=>$hash_base, file_name=>$file_name) .
4242                       qq!" />\n!;
4243         }
4244         close $fd
4245                 or print "Reading blob failed.\n";
4246         print "</div>";
4247         git_footer_html();
4248 }
4249
4250 sub git_tree {
4251         if (!defined $hash_base) {
4252                 $hash_base = "HEAD";
4253         }
4254         if (!defined $hash) {
4255                 if (defined $file_name) {
4256                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4257                 } else {
4258                         $hash = $hash_base;
4259                 }
4260         }
4261         $/ = "\0";
4262         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4263                 or die_error(undef, "Open git-ls-tree failed");
4264         my @entries = map { chomp; $_ } <$fd>;
4265         close $fd or die_error(undef, "Reading tree failed");
4266         $/ = "\n";
4267
4268         my $refs = git_get_references();
4269         my $ref = format_ref_marker($refs, $hash_base);
4270         git_header_html();
4271         my $basedir = '';
4272         my ($have_blame) = gitweb_check_feature('blame');
4273         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4274                 my @views_nav = ();
4275                 if (defined $file_name) {
4276                         push @views_nav,
4277                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4278                                                        hash=>$hash, file_name=>$file_name)},
4279                                         "history"),
4280                                 $cgi->a({-href => href(action=>"tree",
4281                                                        hash_base=>"HEAD", file_name=>$file_name)},
4282                                         "HEAD"),
4283                 }
4284                 my $snapshot_links = format_snapshot_links($hash);
4285                 if (defined $snapshot_links) {
4286                         # FIXME: Should be available when we have no hash base as well.
4287                         push @views_nav, $snapshot_links;
4288                 }
4289                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4290                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4291         } else {
4292                 undef $hash_base;
4293                 print "<div class=\"page_nav\">\n";
4294                 print "<br/><br/></div>\n";
4295                 print "<div class=\"title\">$hash</div>\n";
4296         }
4297         if (defined $file_name) {
4298                 $basedir = $file_name;
4299                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4300                         $basedir .= '/';
4301                 }
4302         }
4303         git_print_page_path($file_name, 'tree', $hash_base);
4304         print "<div class=\"page_body\">\n";
4305         print "<table cellspacing=\"0\">\n";
4306         my $alternate = 1;
4307         # '..' (top directory) link if possible
4308         if (defined $hash_base &&
4309             defined $file_name && $file_name =~ m![^/]+$!) {
4310                 if ($alternate) {
4311                         print "<tr class=\"dark\">\n";
4312                 } else {
4313                         print "<tr class=\"light\">\n";
4314                 }
4315                 $alternate ^= 1;
4316
4317                 my $up = $file_name;
4318                 $up =~ s!/?[^/]+$!!;
4319                 undef $up unless $up;
4320                 # based on git_print_tree_entry
4321                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4322                 print '<td class="list">';
4323                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4324                                              file_name=>$up)},
4325                               "..");
4326                 print "</td>\n";
4327                 print "<td class=\"link\"></td>\n";
4328
4329                 print "</tr>\n";
4330         }
4331         foreach my $line (@entries) {
4332                 my %t = parse_ls_tree_line($line, -z => 1);
4333
4334                 if ($alternate) {
4335                         print "<tr class=\"dark\">\n";
4336                 } else {
4337                         print "<tr class=\"light\">\n";
4338                 }
4339                 $alternate ^= 1;
4340
4341                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4342
4343                 print "</tr>\n";
4344         }
4345         print "</table>\n" .
4346               "</div>";
4347         git_footer_html();
4348 }
4349
4350 sub git_snapshot {
4351         my @supported_fmts = gitweb_check_feature('snapshot');
4352         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4353
4354         my $format = $cgi->param('sf');
4355         if (!@supported_fmts) {
4356                 die_error('403 Permission denied', "Permission denied");
4357         }
4358         # default to first supported snapshot format
4359         $format ||= $supported_fmts[0];
4360         if ($format !~ m/^[a-z0-9]+$/) {
4361                 die_error(undef, "Invalid snapshot format parameter");
4362         } elsif (!exists($known_snapshot_formats{$format})) {
4363                 die_error(undef, "Unknown snapshot format");
4364         } elsif (!grep($_ eq $format, @supported_fmts)) {
4365                 die_error(undef, "Unsupported snapshot format");
4366         }
4367
4368         if (!defined $hash) {
4369                 $hash = git_get_head_hash($project);
4370         }
4371
4372         my $git_command = git_cmd_str();
4373         my $name = $project;
4374         $name =~ s,([^/])/*\.git$,$1,;
4375         $name = basename($name);
4376         my $filename = to_utf8($name);
4377         $name =~ s/\047/\047\\\047\047/g;
4378         my $cmd;
4379         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4380         $cmd = "$git_command archive " .
4381                 "--format=$known_snapshot_formats{$format}{'format'} " .
4382                 "--prefix=\'$name\'/ $hash";
4383         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4384                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4385         }
4386
4387         print $cgi->header(
4388                 -type => $known_snapshot_formats{$format}{'type'},
4389                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4390                 -status => '200 OK');
4391
4392         open my $fd, "-|", $cmd
4393                 or die_error(undef, "Execute git-archive failed");
4394         binmode STDOUT, ':raw';
4395         print <$fd>;
4396         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4397         close $fd;
4398 }
4399
4400 sub git_log {
4401         my $head = git_get_head_hash($project);
4402         if (!defined $hash) {
4403                 $hash = $head;
4404         }
4405         if (!defined $page) {
4406                 $page = 0;
4407         }
4408         my $refs = git_get_references();
4409
4410         my @commitlist = parse_commits($hash, 101, (100 * $page));
4411
4412         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4413
4414         git_header_html();
4415         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4416
4417         if (!@commitlist) {
4418                 my %co = parse_commit($hash);
4419
4420                 git_print_header_div('summary', $project);
4421                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4422         }
4423         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4424         for (my $i = 0; $i <= $to; $i++) {
4425                 my %co = %{$commitlist[$i]};
4426                 next if !%co;
4427                 my $commit = $co{'id'};
4428                 my $ref = format_ref_marker($refs, $commit);
4429                 my %ad = parse_date($co{'author_epoch'});
4430                 git_print_header_div('commit',
4431                                "<span class=\"age\">$co{'age_string'}</span>" .
4432                                esc_html($co{'title'}) . $ref,
4433                                $commit);
4434                 print "<div class=\"title_text\">\n" .
4435                       "<div class=\"log_link\">\n" .
4436                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4437                       " | " .
4438                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4439                       " | " .
4440                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4441                       "<br/>\n" .
4442                       "</div>\n" .
4443                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4444                       "</div>\n";
4445
4446                 print "<div class=\"log_body\">\n";
4447                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4448                 print "</div>\n";
4449         }
4450         if ($#commitlist >= 100) {
4451                 print "<div class=\"page_nav\">\n";
4452                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4453                                -accesskey => "n", -title => "Alt-n"}, "next");
4454                 print "</div>\n";
4455         }
4456         git_footer_html();
4457 }
4458
4459 sub git_commit {
4460         $hash ||= $hash_base || "HEAD";
4461         my %co = parse_commit($hash);
4462         if (!%co) {
4463                 die_error(undef, "Unknown commit object");
4464         }
4465         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4466         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4467
4468         my $parent  = $co{'parent'};
4469         my $parents = $co{'parents'}; # listref
4470
4471         # we need to prepare $formats_nav before any parameter munging
4472         my $formats_nav;
4473         if (!defined $parent) {
4474                 # --root commitdiff
4475                 $formats_nav .= '(initial)';
4476         } elsif (@$parents == 1) {
4477                 # single parent commit
4478                 $formats_nav .=
4479                         '(parent: ' .
4480                         $cgi->a({-href => href(action=>"commit",
4481                                                hash=>$parent)},
4482                                 esc_html(substr($parent, 0, 7))) .
4483                         ')';
4484         } else {
4485                 # merge commit
4486                 $formats_nav .=
4487                         '(merge: ' .
4488                         join(' ', map {
4489                                 $cgi->a({-href => href(action=>"commit",
4490                                                        hash=>$_)},
4491                                         esc_html(substr($_, 0, 7)));
4492                         } @$parents ) .
4493                         ')';
4494         }
4495
4496         if (!defined $parent) {
4497                 $parent = "--root";
4498         }
4499         my @difftree;
4500         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4501                 @diff_opts,
4502                 (@$parents <= 1 ? $parent : '-c'),
4503                 $hash, "--"
4504                 or die_error(undef, "Open git-diff-tree failed");
4505         @difftree = map { chomp; $_ } <$fd>;
4506         close $fd or die_error(undef, "Reading git-diff-tree failed");
4507
4508         # non-textual hash id's can be cached
4509         my $expires;
4510         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4511                 $expires = "+1d";
4512         }
4513         my $refs = git_get_references();
4514         my $ref = format_ref_marker($refs, $co{'id'});
4515
4516         git_header_html(undef, $expires);
4517         git_print_page_nav('commit', '',
4518                            $hash, $co{'tree'}, $hash,
4519                            $formats_nav);
4520
4521         if (defined $co{'parent'}) {
4522                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4523         } else {
4524                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4525         }
4526         print "<div class=\"title_text\">\n" .
4527               "<table cellspacing=\"0\">\n";
4528         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4529               "<tr>" .
4530               "<td></td><td> $ad{'rfc2822'}";
4531         if ($ad{'hour_local'} < 6) {
4532                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4533                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4534         } else {
4535                 printf(" (%02d:%02d %s)",
4536                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4537         }
4538         print "</td>" .
4539               "</tr>\n";
4540         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4541         print "<tr><td></td><td> $cd{'rfc2822'}" .
4542               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4543               "</td></tr>\n";
4544         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4545         print "<tr>" .
4546               "<td>tree</td>" .
4547               "<td class=\"sha1\">" .
4548               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4549                        class => "list"}, $co{'tree'}) .
4550               "</td>" .
4551               "<td class=\"link\">" .
4552               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4553                       "tree");
4554         my $snapshot_links = format_snapshot_links($hash);
4555         if (defined $snapshot_links) {
4556                 print " | " . $snapshot_links;
4557         }
4558         print "</td>" .
4559               "</tr>\n";
4560
4561         foreach my $par (@$parents) {
4562                 print "<tr>" .
4563                       "<td>parent</td>" .
4564                       "<td class=\"sha1\">" .
4565                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4566                                class => "list"}, $par) .
4567                       "</td>" .
4568                       "<td class=\"link\">" .
4569                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4570                       " | " .
4571                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4572                       "</td>" .
4573                       "</tr>\n";
4574         }
4575         print "</table>".
4576               "</div>\n";
4577
4578         print "<div class=\"page_body\">\n";
4579         git_print_log($co{'comment'});
4580         print "</div>\n";
4581
4582         git_difftree_body(\@difftree, $hash, @$parents);
4583
4584         git_footer_html();
4585 }
4586
4587 sub git_object {
4588         # object is defined by:
4589         # - hash or hash_base alone
4590         # - hash_base and file_name
4591         my $type;
4592
4593         # - hash or hash_base alone
4594         if ($hash || ($hash_base && !defined $file_name)) {
4595                 my $object_id = $hash || $hash_base;
4596
4597                 my $git_command = git_cmd_str();
4598                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4599                         or die_error('404 Not Found', "Object does not exist");
4600                 $type = <$fd>;
4601                 chomp $type;
4602                 close $fd
4603                         or die_error('404 Not Found', "Object does not exist");
4604
4605         # - hash_base and file_name
4606         } elsif ($hash_base && defined $file_name) {
4607                 $file_name =~ s,/+$,,;
4608
4609                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4610                         or die_error('404 Not Found', "Base object does not exist");
4611
4612                 # here errors should not hapen
4613                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4614                         or die_error(undef, "Open git-ls-tree failed");
4615                 my $line = <$fd>;
4616                 close $fd;
4617
4618                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4619                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4620                         die_error('404 Not Found', "File or directory for given base does not exist");
4621                 }
4622                 $type = $2;
4623                 $hash = $3;
4624         } else {
4625                 die_error('404 Not Found', "Not enough information to find object");
4626         }
4627
4628         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4629                                           hash=>$hash, hash_base=>$hash_base,
4630                                           file_name=>$file_name),
4631                              -status => '302 Found');
4632 }
4633
4634 sub git_blobdiff {
4635         my $format = shift || 'html';
4636
4637         my $fd;
4638         my @difftree;
4639         my %diffinfo;
4640         my $expires;
4641
4642         # preparing $fd and %diffinfo for git_patchset_body
4643         # new style URI
4644         if (defined $hash_base && defined $hash_parent_base) {
4645                 if (defined $file_name) {
4646                         # read raw output
4647                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4648                                 $hash_parent_base, $hash_base,
4649                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4650                                 or die_error(undef, "Open git-diff-tree failed");
4651                         @difftree = map { chomp; $_ } <$fd>;
4652                         close $fd
4653                                 or die_error(undef, "Reading git-diff-tree failed");
4654                         @difftree
4655                                 or die_error('404 Not Found', "Blob diff not found");
4656
4657                 } elsif (defined $hash &&
4658                          $hash =~ /[0-9a-fA-F]{40}/) {
4659                         # try to find filename from $hash
4660
4661                         # read filtered raw output
4662                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4663                                 $hash_parent_base, $hash_base, "--"
4664                                 or die_error(undef, "Open git-diff-tree failed");
4665                         @difftree =
4666                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4667                                 # $hash == to_id
4668                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4669                                 map { chomp; $_ } <$fd>;
4670                         close $fd
4671                                 or die_error(undef, "Reading git-diff-tree failed");
4672                         @difftree
4673                                 or die_error('404 Not Found', "Blob diff not found");
4674
4675                 } else {
4676                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4677                 }
4678
4679                 if (@difftree > 1) {
4680                         die_error('404 Not Found', "Ambiguous blob diff specification");
4681                 }
4682
4683                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4684                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4685                 $file_name   ||= $diffinfo{'to_file'};
4686
4687                 $hash_parent ||= $diffinfo{'from_id'};
4688                 $hash        ||= $diffinfo{'to_id'};
4689
4690                 # non-textual hash id's can be cached
4691                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4692                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4693                         $expires = '+1d';
4694                 }
4695
4696                 # open patch output
4697                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4698                         '-p', ($format eq 'html' ? "--full-index" : ()),
4699                         $hash_parent_base, $hash_base,
4700                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4701                         or die_error(undef, "Open git-diff-tree failed");
4702         }
4703
4704         # old/legacy style URI
4705         if (!%diffinfo && # if new style URI failed
4706             defined $hash && defined $hash_parent) {
4707                 # fake git-diff-tree raw output
4708                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4709                 $diffinfo{'from_id'} = $hash_parent;
4710                 $diffinfo{'to_id'}   = $hash;
4711                 if (defined $file_name) {
4712                         if (defined $file_parent) {
4713                                 $diffinfo{'status'} = '2';
4714                                 $diffinfo{'from_file'} = $file_parent;
4715                                 $diffinfo{'to_file'}   = $file_name;
4716                         } else { # assume not renamed
4717                                 $diffinfo{'status'} = '1';
4718                                 $diffinfo{'from_file'} = $file_name;
4719                                 $diffinfo{'to_file'}   = $file_name;
4720                         }
4721                 } else { # no filename given
4722                         $diffinfo{'status'} = '2';
4723                         $diffinfo{'from_file'} = $hash_parent;
4724                         $diffinfo{'to_file'}   = $hash;
4725                 }
4726
4727                 # non-textual hash id's can be cached
4728                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4729                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4730                         $expires = '+1d';
4731                 }
4732
4733                 # open patch output
4734                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4735                         '-p', ($format eq 'html' ? "--full-index" : ()),
4736                         $hash_parent, $hash, "--"
4737                         or die_error(undef, "Open git-diff failed");
4738         } else  {
4739                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4740                         unless %diffinfo;
4741         }
4742
4743         # header
4744         if ($format eq 'html') {
4745                 my $formats_nav =
4746                         $cgi->a({-href => href(action=>"blobdiff_plain",
4747                                                hash=>$hash, hash_parent=>$hash_parent,
4748                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4749                                                file_name=>$file_name, file_parent=>$file_parent)},
4750                                 "raw");
4751                 git_header_html(undef, $expires);
4752                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4753                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4754                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4755                 } else {
4756                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4757                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4758                 }
4759                 if (defined $file_name) {
4760                         git_print_page_path($file_name, "blob", $hash_base);
4761                 } else {
4762                         print "<div class=\"page_path\"></div>\n";
4763                 }
4764
4765         } elsif ($format eq 'plain') {
4766                 print $cgi->header(
4767                         -type => 'text/plain',
4768                         -charset => 'utf-8',
4769                         -expires => $expires,
4770                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4771
4772                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4773
4774         } else {
4775                 die_error(undef, "Unknown blobdiff format");
4776         }
4777
4778         # patch
4779         if ($format eq 'html') {
4780                 print "<div class=\"page_body\">\n";
4781
4782                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4783                 close $fd;
4784
4785                 print "</div>\n"; # class="page_body"
4786                 git_footer_html();
4787
4788         } else {
4789                 while (my $line = <$fd>) {
4790                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4791                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4792
4793                         print $line;
4794
4795                         last if $line =~ m!^\+\+\+!;
4796                 }
4797                 local $/ = undef;
4798                 print <$fd>;
4799                 close $fd;
4800         }
4801 }
4802
4803 sub git_blobdiff_plain {
4804         git_blobdiff('plain');
4805 }
4806
4807 sub git_commitdiff {
4808         my $format = shift || 'html';
4809         $hash ||= $hash_base || "HEAD";
4810         my %co = parse_commit($hash);
4811         if (!%co) {
4812                 die_error(undef, "Unknown commit object");
4813         }
4814
4815         # choose format for commitdiff for merge
4816         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4817                 $hash_parent = '--cc';
4818         }
4819         # we need to prepare $formats_nav before almost any parameter munging
4820         my $formats_nav;
4821         if ($format eq 'html') {
4822                 $formats_nav =
4823                         $cgi->a({-href => href(action=>"commitdiff_plain",
4824                                                hash=>$hash, hash_parent=>$hash_parent)},
4825                                 "raw");
4826
4827                 if (defined $hash_parent &&
4828                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4829                         # commitdiff with two commits given
4830                         my $hash_parent_short = $hash_parent;
4831                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4832                                 $hash_parent_short = substr($hash_parent, 0, 7);
4833                         }
4834                         $formats_nav .=
4835                                 ' (from';
4836                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4837                                 if ($co{'parents'}[$i] eq $hash_parent) {
4838                                         $formats_nav .= ' parent ' . ($i+1);
4839                                         last;
4840                                 }
4841                         }
4842                         $formats_nav .= ': ' .
4843                                 $cgi->a({-href => href(action=>"commitdiff",
4844                                                        hash=>$hash_parent)},
4845                                         esc_html($hash_parent_short)) .
4846                                 ')';
4847                 } elsif (!$co{'parent'}) {
4848                         # --root commitdiff
4849                         $formats_nav .= ' (initial)';
4850                 } elsif (scalar @{$co{'parents'}} == 1) {
4851                         # single parent commit
4852                         $formats_nav .=
4853                                 ' (parent: ' .
4854                                 $cgi->a({-href => href(action=>"commitdiff",
4855                                                        hash=>$co{'parent'})},
4856                                         esc_html(substr($co{'parent'}, 0, 7))) .
4857                                 ')';
4858                 } else {
4859                         # merge commit
4860                         if ($hash_parent eq '--cc') {
4861                                 $formats_nav .= ' | ' .
4862                                         $cgi->a({-href => href(action=>"commitdiff",
4863                                                                hash=>$hash, hash_parent=>'-c')},
4864                                                 'combined');
4865                         } else { # $hash_parent eq '-c'
4866                                 $formats_nav .= ' | ' .
4867                                         $cgi->a({-href => href(action=>"commitdiff",
4868                                                                hash=>$hash, hash_parent=>'--cc')},
4869                                                 'compact');
4870                         }
4871                         $formats_nav .=
4872                                 ' (merge: ' .
4873                                 join(' ', map {
4874                                         $cgi->a({-href => href(action=>"commitdiff",
4875                                                                hash=>$_)},
4876                                                 esc_html(substr($_, 0, 7)));
4877                                 } @{$co{'parents'}} ) .
4878                                 ')';
4879                 }
4880         }
4881
4882         my $hash_parent_param = $hash_parent;
4883         if (!defined $hash_parent_param) {
4884                 # --cc for multiple parents, --root for parentless
4885                 $hash_parent_param =
4886                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4887         }
4888
4889         # read commitdiff
4890         my $fd;
4891         my @difftree;
4892         if ($format eq 'html') {
4893                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4894                         "--no-commit-id", "--patch-with-raw", "--full-index",
4895                         $hash_parent_param, $hash, "--"
4896                         or die_error(undef, "Open git-diff-tree failed");
4897
4898                 while (my $line = <$fd>) {
4899                         chomp $line;
4900                         # empty line ends raw part of diff-tree output
4901                         last unless $line;
4902                         push @difftree, scalar parse_difftree_raw_line($line);
4903                 }
4904
4905         } elsif ($format eq 'plain') {
4906                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4907                         '-p', $hash_parent_param, $hash, "--"
4908                         or die_error(undef, "Open git-diff-tree failed");
4909
4910         } else {
4911                 die_error(undef, "Unknown commitdiff format");
4912         }
4913
4914         # non-textual hash id's can be cached
4915         my $expires;
4916         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4917                 $expires = "+1d";
4918         }
4919
4920         # write commit message
4921         if ($format eq 'html') {
4922                 my $refs = git_get_references();
4923                 my $ref = format_ref_marker($refs, $co{'id'});
4924
4925                 git_header_html(undef, $expires);
4926                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4927                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4928                 git_print_authorship(\%co);
4929                 print "<div class=\"page_body\">\n";
4930                 if (@{$co{'comment'}} > 1) {
4931                         print "<div class=\"log\">\n";
4932                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4933                         print "</div>\n"; # class="log"
4934                 }
4935
4936         } elsif ($format eq 'plain') {
4937                 my $refs = git_get_references("tags");
4938                 my $tagname = git_get_rev_name_tags($hash);
4939                 my $filename = basename($project) . "-$hash.patch";
4940
4941                 print $cgi->header(
4942                         -type => 'text/plain',
4943                         -charset => 'utf-8',
4944                         -expires => $expires,
4945                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4946                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4947                 print <<TEXT;
4948 From: $co{'author'}
4949 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4950 Subject: $co{'title'}
4951 TEXT
4952                 print "X-Git-Tag: $tagname\n" if $tagname;
4953                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4954
4955                 foreach my $line (@{$co{'comment'}}) {
4956                         print "$line\n";
4957                 }
4958                 print "---\n\n";
4959         }
4960
4961         # write patch
4962         if ($format eq 'html') {
4963                 my $use_parents = !defined $hash_parent ||
4964                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4965                 git_difftree_body(\@difftree, $hash,
4966                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4967                 print "<br/>\n";
4968
4969                 git_patchset_body($fd, \@difftree, $hash,
4970                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4971                 close $fd;
4972                 print "</div>\n"; # class="page_body"
4973                 git_footer_html();
4974
4975         } elsif ($format eq 'plain') {
4976                 local $/ = undef;
4977                 print <$fd>;
4978                 close $fd
4979                         or print "Reading git-diff-tree failed\n";
4980         }
4981 }
4982
4983 sub git_commitdiff_plain {
4984         git_commitdiff('plain');
4985 }
4986
4987 sub git_history {
4988         if (!defined $hash_base) {
4989                 $hash_base = git_get_head_hash($project);
4990         }
4991         if (!defined $page) {
4992                 $page = 0;
4993         }
4994         my $ftype;
4995         my %co = parse_commit($hash_base);
4996         if (!%co) {
4997                 die_error(undef, "Unknown commit object");
4998         }
4999
5000         my $refs = git_get_references();
5001         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5002
5003         if (!defined $hash && defined $file_name) {
5004                 $hash = git_get_hash_by_path($hash_base, $file_name);
5005         }
5006         if (defined $hash) {
5007                 $ftype = git_get_type($hash);
5008         }
5009
5010         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5011
5012         my $paging_nav = '';
5013         if ($page > 0) {
5014                 $paging_nav .=
5015                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5016                                                file_name=>$file_name)},
5017                                 "first");
5018                 $paging_nav .= " &sdot; " .
5019                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5020                                                file_name=>$file_name, page=>$page-1),
5021                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5022         } else {
5023                 $paging_nav .= "first";
5024                 $paging_nav .= " &sdot; prev";
5025         }
5026         if ($#commitlist >= 100) {
5027                 $paging_nav .= " &sdot; " .
5028                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5029                                                file_name=>$file_name, page=>$page+1),
5030                                  -accesskey => "n", -title => "Alt-n"}, "next");
5031         } else {
5032                 $paging_nav .= " &sdot; next";
5033         }
5034         my $next_link = '';
5035         if ($#commitlist >= 100) {
5036                 $next_link =
5037                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5038                                                file_name=>$file_name, page=>$page+1),
5039                                  -accesskey => "n", -title => "Alt-n"}, "next");
5040         }
5041
5042         git_header_html();
5043         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5044         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5045         git_print_page_path($file_name, $ftype, $hash_base);
5046
5047         git_history_body(\@commitlist, 0, 99,
5048                          $refs, $hash_base, $ftype, $next_link);
5049
5050         git_footer_html();
5051 }
5052
5053 sub git_search {
5054         my ($have_search) = gitweb_check_feature('search');
5055         if (!$have_search) {
5056                 die_error('403 Permission denied', "Permission denied");
5057         }
5058         if (!defined $searchtext) {
5059                 die_error(undef, "Text field empty");
5060         }
5061         if (!defined $hash) {
5062                 $hash = git_get_head_hash($project);
5063         }
5064         my %co = parse_commit($hash);
5065         if (!%co) {
5066                 die_error(undef, "Unknown commit object");
5067         }
5068         if (!defined $page) {
5069                 $page = 0;
5070         }
5071
5072         $searchtype ||= 'commit';
5073         if ($searchtype eq 'pickaxe') {
5074                 # pickaxe may take all resources of your box and run for several minutes
5075                 # with every query - so decide by yourself how public you make this feature
5076                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5077                 if (!$have_pickaxe) {
5078                         die_error('403 Permission denied', "Permission denied");
5079                 }
5080         }
5081         if ($searchtype eq 'grep') {
5082                 my ($have_grep) = gitweb_check_feature('grep');
5083                 if (!$have_grep) {
5084                         die_error('403 Permission denied', "Permission denied");
5085                 }
5086         }
5087
5088         git_header_html();
5089
5090         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5091                 my $greptype;
5092                 if ($searchtype eq 'commit') {
5093                         $greptype = "--grep=";
5094                 } elsif ($searchtype eq 'author') {
5095                         $greptype = "--author=";
5096                 } elsif ($searchtype eq 'committer') {
5097                         $greptype = "--committer=";
5098                 }
5099                 $greptype .= $search_regexp;
5100                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5101
5102                 my $paging_nav = '';
5103                 if ($page > 0) {
5104                         $paging_nav .=
5105                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5106                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5107                                         "first");
5108                         $paging_nav .= " &sdot; " .
5109                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5110                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5111                                                        page=>$page-1),
5112                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5113                 } else {
5114                         $paging_nav .= "first";
5115                         $paging_nav .= " &sdot; prev";
5116                 }
5117                 if ($#commitlist >= 100) {
5118                         $paging_nav .= " &sdot; " .
5119                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5120                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5121                                                        page=>$page+1),
5122                                          -accesskey => "n", -title => "Alt-n"}, "next");
5123                 } else {
5124                         $paging_nav .= " &sdot; next";
5125                 }
5126                 my $next_link = '';
5127                 if ($#commitlist >= 100) {
5128                         $next_link =
5129                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5130                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5131                                                        page=>$page+1),
5132                                          -accesskey => "n", -title => "Alt-n"}, "next");
5133                 }
5134
5135                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5136                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5137                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5138         }
5139
5140         if ($searchtype eq 'pickaxe') {
5141                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5142                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5143
5144                 print "<table cellspacing=\"0\">\n";
5145                 my $alternate = 1;
5146                 $/ = "\n";
5147                 my $git_command = git_cmd_str();
5148                 my $searchqtext = $searchtext;
5149                 $searchqtext =~ s/'/'\\''/;
5150                 open my $fd, "-|", "$git_command rev-list $hash | " .
5151                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5152                 undef %co;
5153                 my @files;
5154                 while (my $line = <$fd>) {
5155                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5156                                 my %set;
5157                                 $set{'file'} = $6;
5158                                 $set{'from_id'} = $3;
5159                                 $set{'to_id'} = $4;
5160                                 $set{'id'} = $set{'to_id'};
5161                                 if ($set{'id'} =~ m/0{40}/) {
5162                                         $set{'id'} = $set{'from_id'};
5163                                 }
5164                                 if ($set{'id'} =~ m/0{40}/) {
5165                                         next;
5166                                 }
5167                                 push @files, \%set;
5168                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5169                                 if (%co) {
5170                                         if ($alternate) {
5171                                                 print "<tr class=\"dark\">\n";
5172                                         } else {
5173                                                 print "<tr class=\"light\">\n";
5174                                         }
5175                                         $alternate ^= 1;
5176                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5177                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5178                                               "<td><i>" . $author . "</i></td>\n" .
5179                                               "<td>" .
5180                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5181                                                       -class => "list subject"},
5182                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5183                                         while (my $setref = shift @files) {
5184                                                 my %set = %$setref;
5185                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5186                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5187                                                               -class => "list"},
5188                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5189                                                       "<br/>\n";
5190                                         }
5191                                         print "</td>\n" .
5192                                               "<td class=\"link\">" .
5193                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5194                                               " | " .
5195                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5196                                         print "</td>\n" .
5197                                               "</tr>\n";
5198                                 }
5199                                 %co = parse_commit($1);
5200                         }
5201                 }
5202                 close $fd;
5203
5204                 print "</table>\n";
5205         }
5206
5207         if ($searchtype eq 'grep') {
5208                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5209                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5210
5211                 print "<table cellspacing=\"0\">\n";
5212                 my $alternate = 1;
5213                 my $matches = 0;
5214                 $/ = "\n";
5215                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5216                 my $lastfile = '';
5217                 while (my $line = <$fd>) {
5218                         chomp $line;
5219                         my ($file, $lno, $ltext, $binary);
5220                         last if ($matches++ > 1000);
5221                         if ($line =~ /^Binary file (.+) matches$/) {
5222                                 $file = $1;
5223                                 $binary = 1;
5224                         } else {
5225                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5226                         }
5227                         if ($file ne $lastfile) {
5228                                 $lastfile and print "</td></tr>\n";
5229                                 if ($alternate++) {
5230                                         print "<tr class=\"dark\">\n";
5231                                 } else {
5232                                         print "<tr class=\"light\">\n";
5233                                 }
5234                                 print "<td class=\"list\">".
5235                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5236                                                                file_name=>"$file"),
5237                                                 -class => "list"}, esc_path($file));
5238                                 print "</td><td>\n";
5239                                 $lastfile = $file;
5240                         }
5241                         if ($binary) {
5242                                 print "<div class=\"binary\">Binary file</div>\n";
5243                         } else {
5244                                 $ltext = untabify($ltext);
5245                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5246                                         $ltext = esc_html($1, -nbsp=>1);
5247                                         $ltext .= '<span class="match">';
5248                                         $ltext .= esc_html($2, -nbsp=>1);
5249                                         $ltext .= '</span>';
5250                                         $ltext .= esc_html($3, -nbsp=>1);
5251                                 } else {
5252                                         $ltext = esc_html($ltext, -nbsp=>1);
5253                                 }
5254                                 print "<div class=\"pre\">" .
5255                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5256                                                                file_name=>"$file").'#l'.$lno,
5257                                                 -class => "linenr"}, sprintf('%4i', $lno))
5258                                         . ' ' .  $ltext . "</div>\n";
5259                         }
5260                 }
5261                 if ($lastfile) {
5262                         print "</td></tr>\n";
5263                         if ($matches > 1000) {
5264                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5265                         }
5266                 } else {
5267                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5268                 }
5269                 close $fd;
5270
5271                 print "</table>\n";
5272         }
5273         git_footer_html();
5274 }
5275
5276 sub git_search_help {
5277         git_header_html();
5278         git_print_page_nav('','', $hash,$hash,$hash);
5279         print <<EOT;
5280 <dl>
5281 <dt><b>commit</b></dt>
5282 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5283 EOT
5284         my ($have_grep) = gitweb_check_feature('grep');
5285         if ($have_grep) {
5286                 print <<EOT;
5287 <dt><b>grep</b></dt>
5288 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5289     a different one) are searched for the given
5290 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5291 (POSIX extended) and the matches are listed. On large
5292 trees, this search can take a while and put some strain on the server, so please use it with
5293 some consideration.</dd>
5294 EOT
5295         }
5296         print <<EOT;
5297 <dt><b>author</b></dt>
5298 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5299 <dt><b>committer</b></dt>
5300 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5301 EOT
5302         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5303         if ($have_pickaxe) {
5304                 print <<EOT;
5305 <dt><b>pickaxe</b></dt>
5306 <dd>All commits that caused the string to appear or disappear from any file (changes that
5307 added, removed or "modified" the string) will be listed. This search can take a while and
5308 takes a lot of strain on the server, so please use it wisely.</dd>
5309 EOT
5310         }
5311         print "</dl>\n";
5312         git_footer_html();
5313 }
5314
5315 sub git_shortlog {
5316         my $head = git_get_head_hash($project);
5317         if (!defined $hash) {
5318                 $hash = $head;
5319         }
5320         if (!defined $page) {
5321                 $page = 0;
5322         }
5323         my $refs = git_get_references();
5324
5325         my @commitlist = parse_commits($hash, 101, (100 * $page));
5326
5327         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5328         my $next_link = '';
5329         if ($#commitlist >= 100) {
5330                 $next_link =
5331                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5332                                  -accesskey => "n", -title => "Alt-n"}, "next");
5333         }
5334
5335         git_header_html();
5336         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5337         git_print_header_div('summary', $project);
5338
5339         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5340
5341         git_footer_html();
5342 }
5343
5344 ## ......................................................................
5345 ## feeds (RSS, Atom; OPML)
5346
5347 sub git_feed {
5348         my $format = shift || 'atom';
5349         my ($have_blame) = gitweb_check_feature('blame');
5350
5351         # Atom: http://www.atomenabled.org/developers/syndication/
5352         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5353         if ($format ne 'rss' && $format ne 'atom') {
5354                 die_error(undef, "Unknown web feed format");
5355         }
5356
5357         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5358         my $head = $hash || 'HEAD';
5359         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5360
5361         my %latest_commit;
5362         my %latest_date;
5363         my $content_type = "application/$format+xml";
5364         if (defined $cgi->http('HTTP_ACCEPT') &&
5365                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5366                 # browser (feed reader) prefers text/xml
5367                 $content_type = 'text/xml';
5368         }
5369         if (defined($commitlist[0])) {
5370                 %latest_commit = %{$commitlist[0]};
5371                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5372                 print $cgi->header(
5373                         -type => $content_type,
5374                         -charset => 'utf-8',
5375                         -last_modified => $latest_date{'rfc2822'});
5376         } else {
5377                 print $cgi->header(
5378                         -type => $content_type,
5379                         -charset => 'utf-8');
5380         }
5381
5382         # Optimization: skip generating the body if client asks only
5383         # for Last-Modified date.
5384         return if ($cgi->request_method() eq 'HEAD');
5385
5386         # header variables
5387         my $title = "$site_name - $project/$action";
5388         my $feed_type = 'log';
5389         if (defined $hash) {
5390                 $title .= " - '$hash'";
5391                 $feed_type = 'branch log';
5392                 if (defined $file_name) {
5393                         $title .= " :: $file_name";
5394                         $feed_type = 'history';
5395                 }
5396         } elsif (defined $file_name) {
5397                 $title .= " - $file_name";
5398                 $feed_type = 'history';
5399         }
5400         $title .= " $feed_type";
5401         my $descr = git_get_project_description($project);
5402         if (defined $descr) {
5403                 $descr = esc_html($descr);
5404         } else {
5405                 $descr = "$project " .
5406                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5407                          " feed";
5408         }
5409         my $owner = git_get_project_owner($project);
5410         $owner = esc_html($owner);
5411
5412         #header
5413         my $alt_url;
5414         if (defined $file_name) {
5415                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5416         } elsif (defined $hash) {
5417                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5418         } else {
5419                 $alt_url = href(-full=>1, action=>"summary");
5420         }
5421         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5422         if ($format eq 'rss') {
5423                 print <<XML;
5424 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5425 <channel>
5426 XML
5427                 print "<title>$title</title>\n" .
5428                       "<link>$alt_url</link>\n" .
5429                       "<description>$descr</description>\n" .
5430                       "<language>en</language>\n";
5431         } elsif ($format eq 'atom') {
5432                 print <<XML;
5433 <feed xmlns="http://www.w3.org/2005/Atom">
5434 XML
5435                 print "<title>$title</title>\n" .
5436                       "<subtitle>$descr</subtitle>\n" .
5437                       '<link rel="alternate" type="text/html" href="' .
5438                       $alt_url . '" />' . "\n" .
5439                       '<link rel="self" type="' . $content_type . '" href="' .
5440                       $cgi->self_url() . '" />' . "\n" .
5441                       "<id>" . href(-full=>1) . "</id>\n" .
5442                       # use project owner for feed author
5443                       "<author><name>$owner</name></author>\n";
5444                 if (defined $favicon) {
5445                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5446                 }
5447                 if (defined $logo_url) {
5448                         # not twice as wide as tall: 72 x 27 pixels
5449                         print "<logo>" . esc_url($logo) . "</logo>\n";
5450                 }
5451                 if (! %latest_date) {
5452                         # dummy date to keep the feed valid until commits trickle in:
5453                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5454                 } else {
5455                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5456                 }
5457         }
5458
5459         # contents
5460         for (my $i = 0; $i <= $#commitlist; $i++) {
5461                 my %co = %{$commitlist[$i]};
5462                 my $commit = $co{'id'};
5463                 # we read 150, we always show 30 and the ones more recent than 48 hours
5464                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5465                         last;
5466                 }
5467                 my %cd = parse_date($co{'author_epoch'});
5468
5469                 # get list of changed files
5470                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5471                         $co{'parent'} || "--root",
5472                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5473                         or next;
5474                 my @difftree = map { chomp; $_ } <$fd>;
5475                 close $fd
5476                         or next;
5477
5478                 # print element (entry, item)
5479                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5480                 if ($format eq 'rss') {
5481                         print "<item>\n" .
5482                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5483                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5484                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5485                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5486                               "<link>$co_url</link>\n" .
5487                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5488                               "<content:encoded>" .
5489                               "<![CDATA[\n";
5490                 } elsif ($format eq 'atom') {
5491                         print "<entry>\n" .
5492                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5493                               "<updated>$cd{'iso-8601'}</updated>\n" .
5494                               "<author>\n" .
5495                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5496                         if ($co{'author_email'}) {
5497                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5498                         }
5499                         print "</author>\n" .
5500                               # use committer for contributor
5501                               "<contributor>\n" .
5502                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5503                         if ($co{'committer_email'}) {
5504                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5505                         }
5506                         print "</contributor>\n" .
5507                               "<published>$cd{'iso-8601'}</published>\n" .
5508                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5509                               "<id>$co_url</id>\n" .
5510                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5511                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5512                 }
5513                 my $comment = $co{'comment'};
5514                 print "<pre>\n";
5515                 foreach my $line (@$comment) {
5516                         $line = esc_html($line);
5517                         print "$line\n";
5518                 }
5519                 print "</pre><ul>\n";
5520                 foreach my $difftree_line (@difftree) {
5521                         my %difftree = parse_difftree_raw_line($difftree_line);
5522                         next if !$difftree{'from_id'};
5523
5524                         my $file = $difftree{'file'} || $difftree{'to_file'};
5525
5526                         print "<li>" .
5527                               "[" .
5528                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5529                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5530                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5531                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5532                                       -title => "diff"}, 'D');
5533                         if ($have_blame) {
5534                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5535                                                              file_name=>$file, hash_base=>$commit),
5536                                               -title => "blame"}, 'B');
5537                         }
5538                         # if this is not a feed of a file history
5539                         if (!defined $file_name || $file_name ne $file) {
5540                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5541                                                              file_name=>$file, hash=>$commit),
5542                                               -title => "history"}, 'H');
5543                         }
5544                         $file = esc_path($file);
5545                         print "] ".
5546                               "$file</li>\n";
5547                 }
5548                 if ($format eq 'rss') {
5549                         print "</ul>]]>\n" .
5550                               "</content:encoded>\n" .
5551                               "</item>\n";
5552                 } elsif ($format eq 'atom') {
5553                         print "</ul>\n</div>\n" .
5554                               "</content>\n" .
5555                               "</entry>\n";
5556                 }
5557         }
5558
5559         # end of feed
5560         if ($format eq 'rss') {
5561                 print "</channel>\n</rss>\n";
5562         }       elsif ($format eq 'atom') {
5563                 print "</feed>\n";
5564         }
5565 }
5566
5567 sub git_rss {
5568         git_feed('rss');
5569 }
5570
5571 sub git_atom {
5572         git_feed('atom');
5573 }
5574
5575 sub git_opml {
5576         my @list = git_get_projects_list();
5577
5578         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5579         print <<XML;
5580 <?xml version="1.0" encoding="utf-8"?>
5581 <opml version="1.0">
5582 <head>
5583   <title>$site_name OPML Export</title>
5584 </head>
5585 <body>
5586 <outline text="git RSS feeds">
5587 XML
5588
5589         foreach my $pr (@list) {
5590                 my %proj = %$pr;
5591                 my $head = git_get_head_hash($proj{'path'});
5592                 if (!defined $head) {
5593                         next;
5594                 }
5595                 $git_dir = "$projectroot/$proj{'path'}";
5596                 my %co = parse_commit($head);
5597                 if (!%co) {
5598                         next;
5599                 }
5600
5601                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5602                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5603                 my $html = "$my_url?p=$proj{'path'};a=summary";
5604                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5605         }
5606         print <<XML;
5607 </outline>
5608 </body>
5609 </opml>
5610 XML
5611 }