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 # repository configuration
1437 our $config_file = '';
1438 our %config;
1439
1440 # store multiple values for single key as anonymous array reference
1441 # single values stored directly in the hash, not as [ <value> ]
1442 sub hash_set_multi {
1443         my ($hash, $key, $value) = @_;
1444
1445         if (!exists $hash->{$key}) {
1446                 $hash->{$key} = $value;
1447         } elsif (!ref $hash->{$key}) {
1448                 $hash->{$key} = [ $hash->{$key}, $value ];
1449         } else {
1450                 push @{$hash->{$key}}, $value;
1451         }
1452 }
1453
1454 # return hash of git project configuration
1455 # optionally limited to some section, e.g. 'gitweb'
1456 sub git_parse_project_config {
1457         my $section_regexp = shift;
1458         my %config;
1459
1460         local $/ = "\0";
1461
1462         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1463                 or return;
1464
1465         while (my $keyval = <$fh>) {
1466                 chomp $keyval;
1467                 my ($key, $value) = split(/\n/, $keyval, 2);
1468
1469                 hash_set_multi(\%config, $key, $value)
1470                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1471         }
1472         close $fh;
1473
1474         return %config;
1475 }
1476
1477 # convert config value to boolean, 'true' or 'false'
1478 # no value, number > 0, 'true' and 'yes' values are true
1479 # rest of values are treated as false (never as error)
1480 sub config_to_bool {
1481         my $val = shift;
1482
1483         # strip leading and trailing whitespace
1484         $val =~ s/^\s+//;
1485         $val =~ s/\s+$//;
1486
1487         return (!defined $val ||               # section.key
1488                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1489                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1490 }
1491
1492 # convert config value to simple decimal number
1493 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1494 # to be multiplied by 1024, 1048576, or 1073741824
1495 sub config_to_int {
1496         my $val = shift;
1497
1498         # strip leading and trailing whitespace
1499         $val =~ s/^\s+//;
1500         $val =~ s/\s+$//;
1501
1502         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1503                 $unit = lc($unit);
1504                 # unknown unit is treated as 1
1505                 return $num * ($unit eq 'g' ? 1073741824 :
1506                                $unit eq 'm' ?    1048576 :
1507                                $unit eq 'k' ?       1024 : 1);
1508         }
1509         return $val;
1510 }
1511
1512 # convert config value to array reference, if needed
1513 sub config_to_multi {
1514         my $val = shift;
1515
1516         return ref($val) ? $val : [ $val ];
1517 }
1518
1519 sub git_get_project_config {
1520         my ($key, $type) = @_;
1521
1522         # key sanity check
1523         return unless ($key);
1524         $key =~ s/^gitweb\.//;
1525         return if ($key =~ m/\W/);
1526
1527         # type sanity check
1528         if (defined $type) {
1529                 $type =~ s/^--//;
1530                 $type = undef
1531                         unless ($type eq 'bool' || $type eq 'int');
1532         }
1533
1534         # get config
1535         if (!defined $config_file ||
1536             $config_file ne "$git_dir/config") {
1537                 %config = git_parse_project_config('gitweb');
1538                 $config_file = "$git_dir/config";
1539         }
1540
1541         # ensure given type
1542         if (!defined $type) {
1543                 return $config{"gitweb.$key"};
1544         } elsif ($type eq 'bool') {
1545                 # backward compatibility: 'git config --bool' returns true/false
1546                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1547         } elsif ($type eq 'int') {
1548                 return config_to_int($config{"gitweb.$key"});
1549         }
1550         return $config{"gitweb.$key"};
1551 }
1552
1553 # get hash of given path at given ref
1554 sub git_get_hash_by_path {
1555         my $base = shift;
1556         my $path = shift || return undef;
1557         my $type = shift;
1558
1559         $path =~ s,/+$,,;
1560
1561         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1562                 or die_error(undef, "Open git-ls-tree failed");
1563         my $line = <$fd>;
1564         close $fd or return undef;
1565
1566         if (!defined $line) {
1567                 # there is no tree or hash given by $path at $base
1568                 return undef;
1569         }
1570
1571         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1572         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1573         if (defined $type && $type ne $2) {
1574                 # type doesn't match
1575                 return undef;
1576         }
1577         return $3;
1578 }
1579
1580 # get path of entry with given hash at given tree-ish (ref)
1581 # used to get 'from' filename for combined diff (merge commit) for renames
1582 sub git_get_path_by_hash {
1583         my $base = shift || return;
1584         my $hash = shift || return;
1585
1586         local $/ = "\0";
1587
1588         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1589                 or return undef;
1590         while (my $line = <$fd>) {
1591                 chomp $line;
1592
1593                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1594                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1595                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1596                         close $fd;
1597                         return $1;
1598                 }
1599         }
1600         close $fd;
1601         return undef;
1602 }
1603
1604 ## ......................................................................
1605 ## git utility functions, directly accessing git repository
1606
1607 sub git_get_project_description {
1608         my $path = shift;
1609
1610         open my $fd, "$projectroot/$path/description" or return undef;
1611         my $descr = <$fd>;
1612         close $fd;
1613         if (defined $descr) {
1614                 chomp $descr;
1615         }
1616         return $descr;
1617 }
1618
1619 sub git_get_project_url_list {
1620         my $path = shift;
1621
1622         open my $fd, "$projectroot/$path/cloneurl" or return;
1623         my @git_project_url_list = map { chomp; $_ } <$fd>;
1624         close $fd;
1625
1626         return wantarray ? @git_project_url_list : \@git_project_url_list;
1627 }
1628
1629 sub git_get_projects_list {
1630         my ($filter) = @_;
1631         my @list;
1632
1633         $filter ||= '';
1634         $filter =~ s/\.git$//;
1635
1636         my ($check_forks) = gitweb_check_feature('forks');
1637
1638         if (-d $projects_list) {
1639                 # search in directory
1640                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1641                 # remove the trailing "/"
1642                 $dir =~ s!/+$!!;
1643                 my $pfxlen = length("$dir");
1644                 my $pfxdepth = ($dir =~ tr!/!!);
1645
1646                 File::Find::find({
1647                         follow_fast => 1, # follow symbolic links
1648                         follow_skip => 2, # ignore duplicates
1649                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1650                         wanted => sub {
1651                                 # skip project-list toplevel, if we get it.
1652                                 return if (m!^[/.]$!);
1653                                 # only directories can be git repositories
1654                                 return unless (-d $_);
1655                                 # don't traverse too deep (Find is super slow on os x)
1656                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1657                                         $File::Find::prune = 1;
1658                                         return;
1659                                 }
1660
1661                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1662                                 # we check related file in $projectroot
1663                                 if ($check_forks and $subdir =~ m#/.#) {
1664                                         $File::Find::prune = 1;
1665                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1666                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1667                                         $File::Find::prune = 1;
1668                                 }
1669                         },
1670                 }, "$dir");
1671
1672         } elsif (-f $projects_list) {
1673                 # read from file(url-encoded):
1674                 # 'git%2Fgit.git Linus+Torvalds'
1675                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1676                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1677                 my %paths;
1678                 open my ($fd), $projects_list or return;
1679         PROJECT:
1680                 while (my $line = <$fd>) {
1681                         chomp $line;
1682                         my ($path, $owner) = split ' ', $line;
1683                         $path = unescape($path);
1684                         $owner = unescape($owner);
1685                         if (!defined $path) {
1686                                 next;
1687                         }
1688                         if ($filter ne '') {
1689                                 # looking for forks;
1690                                 my $pfx = substr($path, 0, length($filter));
1691                                 if ($pfx ne $filter) {
1692                                         next PROJECT;
1693                                 }
1694                                 my $sfx = substr($path, length($filter));
1695                                 if ($sfx !~ /^\/.*\.git$/) {
1696                                         next PROJECT;
1697                                 }
1698                         } elsif ($check_forks) {
1699                         PATH:
1700                                 foreach my $filter (keys %paths) {
1701                                         # looking for forks;
1702                                         my $pfx = substr($path, 0, length($filter));
1703                                         if ($pfx ne $filter) {
1704                                                 next PATH;
1705                                         }
1706                                         my $sfx = substr($path, length($filter));
1707                                         if ($sfx !~ /^\/.*\.git$/) {
1708                                                 next PATH;
1709                                         }
1710                                         # is a fork, don't include it in
1711                                         # the list
1712                                         next PROJECT;
1713                                 }
1714                         }
1715                         if (check_export_ok("$projectroot/$path")) {
1716                                 my $pr = {
1717                                         path => $path,
1718                                         owner => to_utf8($owner),
1719                                 };
1720                                 push @list, $pr;
1721                                 (my $forks_path = $path) =~ s/\.git$//;
1722                                 $paths{$forks_path}++;
1723                         }
1724                 }
1725                 close $fd;
1726         }
1727         return @list;
1728 }
1729
1730 our $gitweb_project_owner = undef;
1731 sub git_get_project_list_from_file {
1732
1733         return if (defined $gitweb_project_owner);
1734
1735         $gitweb_project_owner = {};
1736         # read from file (url-encoded):
1737         # 'git%2Fgit.git Linus+Torvalds'
1738         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1739         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1740         if (-f $projects_list) {
1741                 open (my $fd , $projects_list);
1742                 while (my $line = <$fd>) {
1743                         chomp $line;
1744                         my ($pr, $ow) = split ' ', $line;
1745                         $pr = unescape($pr);
1746                         $ow = unescape($ow);
1747                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1748                 }
1749                 close $fd;
1750         }
1751 }
1752
1753 sub git_get_project_owner {
1754         my $project = shift;
1755         my $owner;
1756
1757         return undef unless $project;
1758
1759         if (!defined $gitweb_project_owner) {
1760                 git_get_project_list_from_file();
1761         }
1762
1763         if (exists $gitweb_project_owner->{$project}) {
1764                 $owner = $gitweb_project_owner->{$project};
1765         }
1766         if (!defined $owner) {
1767                 $owner = get_file_owner("$projectroot/$project");
1768         }
1769
1770         return $owner;
1771 }
1772
1773 sub git_get_last_activity {
1774         my ($path) = @_;
1775         my $fd;
1776
1777         $git_dir = "$projectroot/$path";
1778         open($fd, "-|", git_cmd(), 'for-each-ref',
1779              '--format=%(committer)',
1780              '--sort=-committerdate',
1781              '--count=1',
1782              'refs/heads') or return;
1783         my $most_recent = <$fd>;
1784         close $fd or return;
1785         if (defined $most_recent &&
1786             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1787                 my $timestamp = $1;
1788                 my $age = time - $timestamp;
1789                 return ($age, age_string($age));
1790         }
1791         return (undef, undef);
1792 }
1793
1794 sub git_get_references {
1795         my $type = shift || "";
1796         my %refs;
1797         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1798         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1799         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1800                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1801                 or return;
1802
1803         while (my $line = <$fd>) {
1804                 chomp $line;
1805                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1806                         if (defined $refs{$1}) {
1807                                 push @{$refs{$1}}, $2;
1808                         } else {
1809                                 $refs{$1} = [ $2 ];
1810                         }
1811                 }
1812         }
1813         close $fd or return;
1814         return \%refs;
1815 }
1816
1817 sub git_get_rev_name_tags {
1818         my $hash = shift || return undef;
1819
1820         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1821                 or return;
1822         my $name_rev = <$fd>;
1823         close $fd;
1824
1825         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1826                 return $1;
1827         } else {
1828                 # catches also '$hash undefined' output
1829                 return undef;
1830         }
1831 }
1832
1833 ## ----------------------------------------------------------------------
1834 ## parse to hash functions
1835
1836 sub parse_date {
1837         my $epoch = shift;
1838         my $tz = shift || "-0000";
1839
1840         my %date;
1841         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1842         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1843         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1844         $date{'hour'} = $hour;
1845         $date{'minute'} = $min;
1846         $date{'mday'} = $mday;
1847         $date{'day'} = $days[$wday];
1848         $date{'month'} = $months[$mon];
1849         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1850                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1851         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1852                              $mday, $months[$mon], $hour ,$min;
1853         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1854                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1855
1856         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1857         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1858         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1859         $date{'hour_local'} = $hour;
1860         $date{'minute_local'} = $min;
1861         $date{'tz_local'} = $tz;
1862         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1863                                   1900+$year, $mon+1, $mday,
1864                                   $hour, $min, $sec, $tz);
1865         return %date;
1866 }
1867
1868 sub parse_tag {
1869         my $tag_id = shift;
1870         my %tag;
1871         my @comment;
1872
1873         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1874         $tag{'id'} = $tag_id;
1875         while (my $line = <$fd>) {
1876                 chomp $line;
1877                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1878                         $tag{'object'} = $1;
1879                 } elsif ($line =~ m/^type (.+)$/) {
1880                         $tag{'type'} = $1;
1881                 } elsif ($line =~ m/^tag (.+)$/) {
1882                         $tag{'name'} = $1;
1883                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1884                         $tag{'author'} = $1;
1885                         $tag{'epoch'} = $2;
1886                         $tag{'tz'} = $3;
1887                 } elsif ($line =~ m/--BEGIN/) {
1888                         push @comment, $line;
1889                         last;
1890                 } elsif ($line eq "") {
1891                         last;
1892                 }
1893         }
1894         push @comment, <$fd>;
1895         $tag{'comment'} = \@comment;
1896         close $fd or return;
1897         if (!defined $tag{'name'}) {
1898                 return
1899         };
1900         return %tag
1901 }
1902
1903 sub parse_commit_text {
1904         my ($commit_text, $withparents) = @_;
1905         my @commit_lines = split '\n', $commit_text;
1906         my %co;
1907
1908         pop @commit_lines; # Remove '\0'
1909
1910         if (! @commit_lines) {
1911                 return;
1912         }
1913
1914         my $header = shift @commit_lines;
1915         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1916                 return;
1917         }
1918         ($co{'id'}, my @parents) = split ' ', $header;
1919         while (my $line = shift @commit_lines) {
1920                 last if $line eq "\n";
1921                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1922                         $co{'tree'} = $1;
1923                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1924                         push @parents, $1;
1925                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1926                         $co{'author'} = $1;
1927                         $co{'author_epoch'} = $2;
1928                         $co{'author_tz'} = $3;
1929                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1930                                 $co{'author_name'}  = $1;
1931                                 $co{'author_email'} = $2;
1932                         } else {
1933                                 $co{'author_name'} = $co{'author'};
1934                         }
1935                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1936                         $co{'committer'} = $1;
1937                         $co{'committer_epoch'} = $2;
1938                         $co{'committer_tz'} = $3;
1939                         $co{'committer_name'} = $co{'committer'};
1940                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1941                                 $co{'committer_name'}  = $1;
1942                                 $co{'committer_email'} = $2;
1943                         } else {
1944                                 $co{'committer_name'} = $co{'committer'};
1945                         }
1946                 }
1947         }
1948         if (!defined $co{'tree'}) {
1949                 return;
1950         };
1951         $co{'parents'} = \@parents;
1952         $co{'parent'} = $parents[0];
1953
1954         foreach my $title (@commit_lines) {
1955                 $title =~ s/^    //;
1956                 if ($title ne "") {
1957                         $co{'title'} = chop_str($title, 80, 5);
1958                         # remove leading stuff of merges to make the interesting part visible
1959                         if (length($title) > 50) {
1960                                 $title =~ s/^Automatic //;
1961                                 $title =~ s/^merge (of|with) /Merge ... /i;
1962                                 if (length($title) > 50) {
1963                                         $title =~ s/(http|rsync):\/\///;
1964                                 }
1965                                 if (length($title) > 50) {
1966                                         $title =~ s/(master|www|rsync)\.//;
1967                                 }
1968                                 if (length($title) > 50) {
1969                                         $title =~ s/kernel.org:?//;
1970                                 }
1971                                 if (length($title) > 50) {
1972                                         $title =~ s/\/pub\/scm//;
1973                                 }
1974                         }
1975                         $co{'title_short'} = chop_str($title, 50, 5);
1976                         last;
1977                 }
1978         }
1979         if ($co{'title'} eq "") {
1980                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1981         }
1982         # remove added spaces
1983         foreach my $line (@commit_lines) {
1984                 $line =~ s/^    //;
1985         }
1986         $co{'comment'} = \@commit_lines;
1987
1988         my $age = time - $co{'committer_epoch'};
1989         $co{'age'} = $age;
1990         $co{'age_string'} = age_string($age);
1991         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1992         if ($age > 60*60*24*7*2) {
1993                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1994                 $co{'age_string_age'} = $co{'age_string'};
1995         } else {
1996                 $co{'age_string_date'} = $co{'age_string'};
1997                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1998         }
1999         return %co;
2000 }
2001
2002 sub parse_commit {
2003         my ($commit_id) = @_;
2004         my %co;
2005
2006         local $/ = "\0";
2007
2008         open my $fd, "-|", git_cmd(), "rev-list",
2009                 "--parents",
2010                 "--header",
2011                 "--max-count=1",
2012                 $commit_id,
2013                 "--",
2014                 or die_error(undef, "Open git-rev-list failed");
2015         %co = parse_commit_text(<$fd>, 1);
2016         close $fd;
2017
2018         return %co;
2019 }
2020
2021 sub parse_commits {
2022         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2023         my @cos;
2024
2025         $maxcount ||= 1;
2026         $skip ||= 0;
2027
2028         local $/ = "\0";
2029
2030         open my $fd, "-|", git_cmd(), "rev-list",
2031                 "--header",
2032                 ($arg ? ($arg) : ()),
2033                 ("--max-count=" . $maxcount),
2034                 ("--skip=" . $skip),
2035                 @extra_options,
2036                 $commit_id,
2037                 "--",
2038                 ($filename ? ($filename) : ())
2039                 or die_error(undef, "Open git-rev-list failed");
2040         while (my $line = <$fd>) {
2041                 my %co = parse_commit_text($line);
2042                 push @cos, \%co;
2043         }
2044         close $fd;
2045
2046         return wantarray ? @cos : \@cos;
2047 }
2048
2049 # parse ref from ref_file, given by ref_id, with given type
2050 sub parse_ref {
2051         my $ref_file = shift;
2052         my $ref_id = shift;
2053         my $type = shift || git_get_type($ref_id);
2054         my %ref_item;
2055
2056         $ref_item{'type'} = $type;
2057         $ref_item{'id'} = $ref_id;
2058         $ref_item{'epoch'} = 0;
2059         $ref_item{'age'} = "unknown";
2060         if ($type eq "tag") {
2061                 my %tag = parse_tag($ref_id);
2062                 $ref_item{'comment'} = $tag{'comment'};
2063                 if ($tag{'type'} eq "commit") {
2064                         my %co = parse_commit($tag{'object'});
2065                         $ref_item{'epoch'} = $co{'committer_epoch'};
2066                         $ref_item{'age'} = $co{'age_string'};
2067                 } elsif (defined($tag{'epoch'})) {
2068                         my $age = time - $tag{'epoch'};
2069                         $ref_item{'epoch'} = $tag{'epoch'};
2070                         $ref_item{'age'} = age_string($age);
2071                 }
2072                 $ref_item{'reftype'} = $tag{'type'};
2073                 $ref_item{'name'} = $tag{'name'};
2074                 $ref_item{'refid'} = $tag{'object'};
2075         } elsif ($type eq "commit"){
2076                 my %co = parse_commit($ref_id);
2077                 $ref_item{'reftype'} = "commit";
2078                 $ref_item{'name'} = $ref_file;
2079                 $ref_item{'title'} = $co{'title'};
2080                 $ref_item{'refid'} = $ref_id;
2081                 $ref_item{'epoch'} = $co{'committer_epoch'};
2082                 $ref_item{'age'} = $co{'age_string'};
2083         } else {
2084                 $ref_item{'reftype'} = $type;
2085                 $ref_item{'name'} = $ref_file;
2086                 $ref_item{'refid'} = $ref_id;
2087         }
2088
2089         return %ref_item;
2090 }
2091
2092 # parse line of git-diff-tree "raw" output
2093 sub parse_difftree_raw_line {
2094         my $line = shift;
2095         my %res;
2096
2097         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2098         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2099         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2100                 $res{'from_mode'} = $1;
2101                 $res{'to_mode'} = $2;
2102                 $res{'from_id'} = $3;
2103                 $res{'to_id'} = $4;
2104                 $res{'status'} = $res{'status_str'} = $5;
2105                 $res{'similarity'} = $6;
2106                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2107                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2108                 } else {
2109                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2110                 }
2111         }
2112         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2113         # combined diff (for merge commit)
2114         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2115                 $res{'nparents'}  = length($1);
2116                 $res{'from_mode'} = [ split(' ', $2) ];
2117                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2118                 $res{'from_id'} = [ split(' ', $3) ];
2119                 $res{'to_id'} = pop @{$res{'from_id'}};
2120                 $res{'status_str'} = $4;
2121                 $res{'status'} = [ split('', $4) ];
2122                 $res{'to_file'} = unquote($5);
2123         }
2124         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2125         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2126                 $res{'commit'} = $1;
2127         }
2128
2129         return wantarray ? %res : \%res;
2130 }
2131
2132 # wrapper: return parsed line of git-diff-tree "raw" output
2133 # (the argument might be raw line, or parsed info)
2134 sub parsed_difftree_line {
2135         my $line_or_ref = shift;
2136
2137         if (ref($line_or_ref) eq "HASH") {
2138                 # pre-parsed (or generated by hand)
2139                 return $line_or_ref;
2140         } else {
2141                 return parse_difftree_raw_line($line_or_ref);
2142         }
2143 }
2144
2145 # parse line of git-ls-tree output
2146 sub parse_ls_tree_line ($;%) {
2147         my $line = shift;
2148         my %opts = @_;
2149         my %res;
2150
2151         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2152         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2153
2154         $res{'mode'} = $1;
2155         $res{'type'} = $2;
2156         $res{'hash'} = $3;
2157         if ($opts{'-z'}) {
2158                 $res{'name'} = $4;
2159         } else {
2160                 $res{'name'} = unquote($4);
2161         }
2162
2163         return wantarray ? %res : \%res;
2164 }
2165
2166 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2167 sub parse_from_to_diffinfo {
2168         my ($diffinfo, $from, $to, @parents) = @_;
2169
2170         if ($diffinfo->{'nparents'}) {
2171                 # combined diff
2172                 $from->{'file'} = [];
2173                 $from->{'href'} = [];
2174                 fill_from_file_info($diffinfo, @parents)
2175                         unless exists $diffinfo->{'from_file'};
2176                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2177                         $from->{'file'}[$i] =
2178                                 defined $diffinfo->{'from_file'}[$i] ?
2179                                         $diffinfo->{'from_file'}[$i] :
2180                                         $diffinfo->{'to_file'};
2181                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2182                                 $from->{'href'}[$i] = href(action=>"blob",
2183                                                            hash_base=>$parents[$i],
2184                                                            hash=>$diffinfo->{'from_id'}[$i],
2185                                                            file_name=>$from->{'file'}[$i]);
2186                         } else {
2187                                 $from->{'href'}[$i] = undef;
2188                         }
2189                 }
2190         } else {
2191                 # ordinary (not combined) diff
2192                 $from->{'file'} = $diffinfo->{'from_file'};
2193                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2194                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2195                                                hash=>$diffinfo->{'from_id'},
2196                                                file_name=>$from->{'file'});
2197                 } else {
2198                         delete $from->{'href'};
2199                 }
2200         }
2201
2202         $to->{'file'} = $diffinfo->{'to_file'};
2203         if (!is_deleted($diffinfo)) { # file exists in result
2204                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2205                                      hash=>$diffinfo->{'to_id'},
2206                                      file_name=>$to->{'file'});
2207         } else {
2208                 delete $to->{'href'};
2209         }
2210 }
2211
2212 ## ......................................................................
2213 ## parse to array of hashes functions
2214
2215 sub git_get_heads_list {
2216         my $limit = shift;
2217         my @headslist;
2218
2219         open my $fd, '-|', git_cmd(), 'for-each-ref',
2220                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2221                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2222                 'refs/heads'
2223                 or return;
2224         while (my $line = <$fd>) {
2225                 my %ref_item;
2226
2227                 chomp $line;
2228                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2229                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2230                 my ($committer, $epoch, $tz) =
2231                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2232                 $name =~ s!^refs/heads/!!;
2233
2234                 $ref_item{'name'}  = $name;
2235                 $ref_item{'id'}    = $hash;
2236                 $ref_item{'title'} = $title || '(no commit message)';
2237                 $ref_item{'epoch'} = $epoch;
2238                 if ($epoch) {
2239                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2240                 } else {
2241                         $ref_item{'age'} = "unknown";
2242                 }
2243
2244                 push @headslist, \%ref_item;
2245         }
2246         close $fd;
2247
2248         return wantarray ? @headslist : \@headslist;
2249 }
2250
2251 sub git_get_tags_list {
2252         my $limit = shift;
2253         my @tagslist;
2254
2255         open my $fd, '-|', git_cmd(), 'for-each-ref',
2256                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2257                 '--format=%(objectname) %(objecttype) %(refname) '.
2258                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2259                 'refs/tags'
2260                 or return;
2261         while (my $line = <$fd>) {
2262                 my %ref_item;
2263
2264                 chomp $line;
2265                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2266                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2267                 my ($creator, $epoch, $tz) =
2268                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2269                 $name =~ s!^refs/tags/!!;
2270
2271                 $ref_item{'type'} = $type;
2272                 $ref_item{'id'} = $id;
2273                 $ref_item{'name'} = $name;
2274                 if ($type eq "tag") {
2275                         $ref_item{'subject'} = $title;
2276                         $ref_item{'reftype'} = $reftype;
2277                         $ref_item{'refid'}   = $refid;
2278                 } else {
2279                         $ref_item{'reftype'} = $type;
2280                         $ref_item{'refid'}   = $id;
2281                 }
2282
2283                 if ($type eq "tag" || $type eq "commit") {
2284                         $ref_item{'epoch'} = $epoch;
2285                         if ($epoch) {
2286                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2287                         } else {
2288                                 $ref_item{'age'} = "unknown";
2289                         }
2290                 }
2291
2292                 push @tagslist, \%ref_item;
2293         }
2294         close $fd;
2295
2296         return wantarray ? @tagslist : \@tagslist;
2297 }
2298
2299 ## ----------------------------------------------------------------------
2300 ## filesystem-related functions
2301
2302 sub get_file_owner {
2303         my $path = shift;
2304
2305         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2306         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2307         if (!defined $gcos) {
2308                 return undef;
2309         }
2310         my $owner = $gcos;
2311         $owner =~ s/[,;].*$//;
2312         return to_utf8($owner);
2313 }
2314
2315 ## ......................................................................
2316 ## mimetype related functions
2317
2318 sub mimetype_guess_file {
2319         my $filename = shift;
2320         my $mimemap = shift;
2321         -r $mimemap or return undef;
2322
2323         my %mimemap;
2324         open(MIME, $mimemap) or return undef;
2325         while (<MIME>) {
2326                 next if m/^#/; # skip comments
2327                 my ($mime, $exts) = split(/\t+/);
2328                 if (defined $exts) {
2329                         my @exts = split(/\s+/, $exts);
2330                         foreach my $ext (@exts) {
2331                                 $mimemap{$ext} = $mime;
2332                         }
2333                 }
2334         }
2335         close(MIME);
2336
2337         $filename =~ /\.([^.]*)$/;
2338         return $mimemap{$1};
2339 }
2340
2341 sub mimetype_guess {
2342         my $filename = shift;
2343         my $mime;
2344         $filename =~ /\./ or return undef;
2345
2346         if ($mimetypes_file) {
2347                 my $file = $mimetypes_file;
2348                 if ($file !~ m!^/!) { # if it is relative path
2349                         # it is relative to project
2350                         $file = "$projectroot/$project/$file";
2351                 }
2352                 $mime = mimetype_guess_file($filename, $file);
2353         }
2354         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2355         return $mime;
2356 }
2357
2358 sub blob_mimetype {
2359         my $fd = shift;
2360         my $filename = shift;
2361
2362         if ($filename) {
2363                 my $mime = mimetype_guess($filename);
2364                 $mime and return $mime;
2365         }
2366
2367         # just in case
2368         return $default_blob_plain_mimetype unless $fd;
2369
2370         if (-T $fd) {
2371                 return 'text/plain' .
2372                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2373         } elsif (! $filename) {
2374                 return 'application/octet-stream';
2375         } elsif ($filename =~ m/\.png$/i) {
2376                 return 'image/png';
2377         } elsif ($filename =~ m/\.gif$/i) {
2378                 return 'image/gif';
2379         } elsif ($filename =~ m/\.jpe?g$/i) {
2380                 return 'image/jpeg';
2381         } else {
2382                 return 'application/octet-stream';
2383         }
2384 }
2385
2386 ## ======================================================================
2387 ## functions printing HTML: header, footer, error page
2388
2389 sub git_header_html {
2390         my $status = shift || "200 OK";
2391         my $expires = shift;
2392
2393         my $title = "$site_name";
2394         if (defined $project) {
2395                 $title .= " - " . to_utf8($project);
2396                 if (defined $action) {
2397                         $title .= "/$action";
2398                         if (defined $file_name) {
2399                                 $title .= " - " . esc_path($file_name);
2400                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2401                                         $title .= "/";
2402                                 }
2403                         }
2404                 }
2405         }
2406         my $content_type;
2407         # require explicit support from the UA if we are to send the page as
2408         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2409         # we have to do this because MSIE sometimes globs '*/*', pretending to
2410         # support xhtml+xml but choking when it gets what it asked for.
2411         if (defined $cgi->http('HTTP_ACCEPT') &&
2412             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2413             $cgi->Accept('application/xhtml+xml') != 0) {
2414                 $content_type = 'application/xhtml+xml';
2415         } else {
2416                 $content_type = 'text/html';
2417         }
2418         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2419                            -status=> $status, -expires => $expires);
2420         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2421         print <<EOF;
2422 <?xml version="1.0" encoding="utf-8"?>
2423 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2424 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2425 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2426 <!-- git core binaries version $git_version -->
2427 <head>
2428 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2429 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2430 <meta name="robots" content="index, nofollow"/>
2431 <title>$title</title>
2432 EOF
2433 # print out each stylesheet that exist
2434         if (defined $stylesheet) {
2435 #provides backwards capability for those people who define style sheet in a config file
2436                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2437         } else {
2438                 foreach my $stylesheet (@stylesheets) {
2439                         next unless $stylesheet;
2440                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2441                 }
2442         }
2443         if (defined $project) {
2444                 printf('<link rel="alternate" title="%s log RSS feed" '.
2445                        'href="%s" type="application/rss+xml" />'."\n",
2446                        esc_param($project), href(action=>"rss"));
2447                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2448                        'href="%s" type="application/rss+xml" />'."\n",
2449                        esc_param($project), href(action=>"rss",
2450                                                  extra_options=>"--no-merges"));
2451                 printf('<link rel="alternate" title="%s log Atom feed" '.
2452                        'href="%s" type="application/atom+xml" />'."\n",
2453                        esc_param($project), href(action=>"atom"));
2454                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2455                        'href="%s" type="application/atom+xml" />'."\n",
2456                        esc_param($project), href(action=>"atom",
2457                                                  extra_options=>"--no-merges"));
2458         } else {
2459                 printf('<link rel="alternate" title="%s projects list" '.
2460                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2461                        $site_name, href(project=>undef, action=>"project_index"));
2462                 printf('<link rel="alternate" title="%s projects feeds" '.
2463                        'href="%s" type="text/x-opml"/>'."\n",
2464                        $site_name, href(project=>undef, action=>"opml"));
2465         }
2466         if (defined $favicon) {
2467                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2468         }
2469
2470         print "</head>\n" .
2471               "<body>\n";
2472
2473         if (-f $site_header) {
2474                 open (my $fd, $site_header);
2475                 print <$fd>;
2476                 close $fd;
2477         }
2478
2479         print "<div class=\"page_header\">\n" .
2480               $cgi->a({-href => esc_url($logo_url),
2481                        -title => $logo_label},
2482                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2483         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2484         if (defined $project) {
2485                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2486                 if (defined $action) {
2487                         print " / $action";
2488                 }
2489                 print "\n";
2490         }
2491         print "</div>\n";
2492
2493         my ($have_search) = gitweb_check_feature('search');
2494         if ((defined $project) && ($have_search)) {
2495                 if (!defined $searchtext) {
2496                         $searchtext = "";
2497                 }
2498                 my $search_hash;
2499                 if (defined $hash_base) {
2500                         $search_hash = $hash_base;
2501                 } elsif (defined $hash) {
2502                         $search_hash = $hash;
2503                 } else {
2504                         $search_hash = "HEAD";
2505                 }
2506                 my $action = $my_uri;
2507                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2508                 if ($use_pathinfo) {
2509                         $action .= "/$project";
2510                 } else {
2511                         $cgi->param("p", $project);
2512                 }
2513                 $cgi->param("a", "search");
2514                 $cgi->param("h", $search_hash);
2515                 print $cgi->startform(-method => "get", -action => $action) .
2516                       "<div class=\"search\">\n" .
2517                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2518                       $cgi->hidden(-name => "a") . "\n" .
2519                       $cgi->hidden(-name => "h") . "\n" .
2520                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2521                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2522                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2523                       " search:\n",
2524                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2525                       "</div>" .
2526                       $cgi->end_form() . "\n";
2527         }
2528 }
2529
2530 sub git_footer_html {
2531         print "<div class=\"page_footer\">\n";
2532         if (defined $project) {
2533                 my $descr = git_get_project_description($project);
2534                 if (defined $descr) {
2535                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2536                 }
2537                 print $cgi->a({-href => href(action=>"rss"),
2538                               -class => "rss_logo"}, "RSS") . " ";
2539                 print $cgi->a({-href => href(action=>"atom"),
2540                               -class => "rss_logo"}, "Atom") . "\n";
2541         } else {
2542                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2543                               -class => "rss_logo"}, "OPML") . " ";
2544                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2545                               -class => "rss_logo"}, "TXT") . "\n";
2546         }
2547         print "</div>\n" ;
2548
2549         if (-f $site_footer) {
2550                 open (my $fd, $site_footer);
2551                 print <$fd>;
2552                 close $fd;
2553         }
2554
2555         print "</body>\n" .
2556               "</html>";
2557 }
2558
2559 sub die_error {
2560         my $status = shift || "403 Forbidden";
2561         my $error = shift || "Malformed query, file missing or permission denied";
2562
2563         git_header_html($status);
2564         print <<EOF;
2565 <div class="page_body">
2566 <br /><br />
2567 $status - $error
2568 <br />
2569 </div>
2570 EOF
2571         git_footer_html();
2572         exit;
2573 }
2574
2575 ## ----------------------------------------------------------------------
2576 ## functions printing or outputting HTML: navigation
2577
2578 sub git_print_page_nav {
2579         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2580         $extra = '' if !defined $extra; # pager or formats
2581
2582         my @navs = qw(summary shortlog log commit commitdiff tree);
2583         if ($suppress) {
2584                 @navs = grep { $_ ne $suppress } @navs;
2585         }
2586
2587         my %arg = map { $_ => {action=>$_} } @navs;
2588         if (defined $head) {
2589                 for (qw(commit commitdiff)) {
2590                         $arg{$_}{'hash'} = $head;
2591                 }
2592                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2593                         for (qw(shortlog log)) {
2594                                 $arg{$_}{'hash'} = $head;
2595                         }
2596                 }
2597         }
2598         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2599         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2600
2601         print "<div class=\"page_nav\">\n" .
2602                 (join " | ",
2603                  map { $_ eq $current ?
2604                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2605                  } @navs);
2606         print "<br/>\n$extra<br/>\n" .
2607               "</div>\n";
2608 }
2609
2610 sub format_paging_nav {
2611         my ($action, $hash, $head, $page, $nrevs) = @_;
2612         my $paging_nav;
2613
2614
2615         if ($hash ne $head || $page) {
2616                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2617         } else {
2618                 $paging_nav .= "HEAD";
2619         }
2620
2621         if ($page > 0) {
2622                 $paging_nav .= " &sdot; " .
2623                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2624                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2625         } else {
2626                 $paging_nav .= " &sdot; prev";
2627         }
2628
2629         if ($nrevs >= (100 * ($page+1)-1)) {
2630                 $paging_nav .= " &sdot; " .
2631                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2632                                  -accesskey => "n", -title => "Alt-n"}, "next");
2633         } else {
2634                 $paging_nav .= " &sdot; next";
2635         }
2636
2637         return $paging_nav;
2638 }
2639
2640 ## ......................................................................
2641 ## functions printing or outputting HTML: div
2642
2643 sub git_print_header_div {
2644         my ($action, $title, $hash, $hash_base) = @_;
2645         my %args = ();
2646
2647         $args{'action'} = $action;
2648         $args{'hash'} = $hash if $hash;
2649         $args{'hash_base'} = $hash_base if $hash_base;
2650
2651         print "<div class=\"header\">\n" .
2652               $cgi->a({-href => href(%args), -class => "title"},
2653               $title ? $title : $action) .
2654               "\n</div>\n";
2655 }
2656
2657 #sub git_print_authorship (\%) {
2658 sub git_print_authorship {
2659         my $co = shift;
2660
2661         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2662         print "<div class=\"author_date\">" .
2663               esc_html($co->{'author_name'}) .
2664               " [$ad{'rfc2822'}";
2665         if ($ad{'hour_local'} < 6) {
2666                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2667                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2668         } else {
2669                 printf(" (%02d:%02d %s)",
2670                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2671         }
2672         print "]</div>\n";
2673 }
2674
2675 sub git_print_page_path {
2676         my $name = shift;
2677         my $type = shift;
2678         my $hb = shift;
2679
2680
2681         print "<div class=\"page_path\">";
2682         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2683                       -title => 'tree root'}, to_utf8("[$project]"));
2684         print " / ";
2685         if (defined $name) {
2686                 my @dirname = split '/', $name;
2687                 my $basename = pop @dirname;
2688                 my $fullname = '';
2689
2690                 foreach my $dir (@dirname) {
2691                         $fullname .= ($fullname ? '/' : '') . $dir;
2692                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2693                                                      hash_base=>$hb),
2694                                       -title => $fullname}, esc_path($dir));
2695                         print " / ";
2696                 }
2697                 if (defined $type && $type eq 'blob') {
2698                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2699                                                      hash_base=>$hb),
2700                                       -title => $name}, esc_path($basename));
2701                 } elsif (defined $type && $type eq 'tree') {
2702                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2703                                                      hash_base=>$hb),
2704                                       -title => $name}, esc_path($basename));
2705                         print " / ";
2706                 } else {
2707                         print esc_path($basename);
2708                 }
2709         }
2710         print "<br/></div>\n";
2711 }
2712
2713 # sub git_print_log (\@;%) {
2714 sub git_print_log ($;%) {
2715         my $log = shift;
2716         my %opts = @_;
2717
2718         if ($opts{'-remove_title'}) {
2719                 # remove title, i.e. first line of log
2720                 shift @$log;
2721         }
2722         # remove leading empty lines
2723         while (defined $log->[0] && $log->[0] eq "") {
2724                 shift @$log;
2725         }
2726
2727         # print log
2728         my $signoff = 0;
2729         my $empty = 0;
2730         foreach my $line (@$log) {
2731                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2732                         $signoff = 1;
2733                         $empty = 0;
2734                         if (! $opts{'-remove_signoff'}) {
2735                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2736                                 next;
2737                         } else {
2738                                 # remove signoff lines
2739                                 next;
2740                         }
2741                 } else {
2742                         $signoff = 0;
2743                 }
2744
2745                 # print only one empty line
2746                 # do not print empty line after signoff
2747                 if ($line eq "") {
2748                         next if ($empty || $signoff);
2749                         $empty = 1;
2750                 } else {
2751                         $empty = 0;
2752                 }
2753
2754                 print format_log_line_html($line) . "<br/>\n";
2755         }
2756
2757         if ($opts{'-final_empty_line'}) {
2758                 # end with single empty line
2759                 print "<br/>\n" unless $empty;
2760         }
2761 }
2762
2763 # return link target (what link points to)
2764 sub git_get_link_target {
2765         my $hash = shift;
2766         my $link_target;
2767
2768         # read link
2769         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2770                 or return;
2771         {
2772                 local $/;
2773                 $link_target = <$fd>;
2774         }
2775         close $fd
2776                 or return;
2777
2778         return $link_target;
2779 }
2780
2781 # given link target, and the directory (basedir) the link is in,
2782 # return target of link relative to top directory (top tree);
2783 # return undef if it is not possible (including absolute links).
2784 sub normalize_link_target {
2785         my ($link_target, $basedir, $hash_base) = @_;
2786
2787         # we can normalize symlink target only if $hash_base is provided
2788         return unless $hash_base;
2789
2790         # absolute symlinks (beginning with '/') cannot be normalized
2791         return if (substr($link_target, 0, 1) eq '/');
2792
2793         # normalize link target to path from top (root) tree (dir)
2794         my $path;
2795         if ($basedir) {
2796                 $path = $basedir . '/' . $link_target;
2797         } else {
2798                 # we are in top (root) tree (dir)
2799                 $path = $link_target;
2800         }
2801
2802         # remove //, /./, and /../
2803         my @path_parts;
2804         foreach my $part (split('/', $path)) {
2805                 # discard '.' and ''
2806                 next if (!$part || $part eq '.');
2807                 # handle '..'
2808                 if ($part eq '..') {
2809                         if (@path_parts) {
2810                                 pop @path_parts;
2811                         } else {
2812                                 # link leads outside repository (outside top dir)
2813                                 return;
2814                         }
2815                 } else {
2816                         push @path_parts, $part;
2817                 }
2818         }
2819         $path = join('/', @path_parts);
2820
2821         return $path;
2822 }
2823
2824 # print tree entry (row of git_tree), but without encompassing <tr> element
2825 sub git_print_tree_entry {
2826         my ($t, $basedir, $hash_base, $have_blame) = @_;
2827
2828         my %base_key = ();
2829         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2830
2831         # The format of a table row is: mode list link.  Where mode is
2832         # the mode of the entry, list is the name of the entry, an href,
2833         # and link is the action links of the entry.
2834
2835         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2836         if ($t->{'type'} eq "blob") {
2837                 print "<td class=\"list\">" .
2838                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2839                                                file_name=>"$basedir$t->{'name'}", %base_key),
2840                                 -class => "list"}, esc_path($t->{'name'}));
2841                 if (S_ISLNK(oct $t->{'mode'})) {
2842                         my $link_target = git_get_link_target($t->{'hash'});
2843                         if ($link_target) {
2844                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2845                                 if (defined $norm_target) {
2846                                         print " -> " .
2847                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2848                                                                      file_name=>$norm_target),
2849                                                        -title => $norm_target}, esc_path($link_target));
2850                                 } else {
2851                                         print " -> " . esc_path($link_target);
2852                                 }
2853                         }
2854                 }
2855                 print "</td>\n";
2856                 print "<td class=\"link\">";
2857                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2858                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2859                               "blob");
2860                 if ($have_blame) {
2861                         print " | " .
2862                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2863                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2864                                       "blame");
2865                 }
2866                 if (defined $hash_base) {
2867                         print " | " .
2868                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2869                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2870                                       "history");
2871                 }
2872                 print " | " .
2873                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2874                                                file_name=>"$basedir$t->{'name'}")},
2875                                 "raw");
2876                 print "</td>\n";
2877
2878         } elsif ($t->{'type'} eq "tree") {
2879                 print "<td class=\"list\">";
2880                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2881                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2882                               esc_path($t->{'name'}));
2883                 print "</td>\n";
2884                 print "<td class=\"link\">";
2885                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2886                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2887                               "tree");
2888                 if (defined $hash_base) {
2889                         print " | " .
2890                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2891                                                      file_name=>"$basedir$t->{'name'}")},
2892                                       "history");
2893                 }
2894                 print "</td>\n";
2895         } else {
2896                 # unknown object: we can only present history for it
2897                 # (this includes 'commit' object, i.e. submodule support)
2898                 print "<td class=\"list\">" .
2899                       esc_path($t->{'name'}) .
2900                       "</td>\n";
2901                 print "<td class=\"link\">";
2902                 if (defined $hash_base) {
2903                         print $cgi->a({-href => href(action=>"history",
2904                                                      hash_base=>$hash_base,
2905                                                      file_name=>"$basedir$t->{'name'}")},
2906                                       "history");
2907                 }
2908                 print "</td>\n";
2909         }
2910 }
2911
2912 ## ......................................................................
2913 ## functions printing large fragments of HTML
2914
2915 # get pre-image filenames for merge (combined) diff
2916 sub fill_from_file_info {
2917         my ($diff, @parents) = @_;
2918
2919         $diff->{'from_file'} = [ ];
2920         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2921         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2922                 if ($diff->{'status'}[$i] eq 'R' ||
2923                     $diff->{'status'}[$i] eq 'C') {
2924                         $diff->{'from_file'}[$i] =
2925                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2926                 }
2927         }
2928
2929         return $diff;
2930 }
2931
2932 # is current raw difftree line of file deletion
2933 sub is_deleted {
2934         my $diffinfo = shift;
2935
2936         return $diffinfo->{'status_str'} =~ /D/;
2937 }
2938
2939 # does patch correspond to [previous] difftree raw line
2940 # $diffinfo  - hashref of parsed raw diff format
2941 # $patchinfo - hashref of parsed patch diff format
2942 #              (the same keys as in $diffinfo)
2943 sub is_patch_split {
2944         my ($diffinfo, $patchinfo) = @_;
2945
2946         return defined $diffinfo && defined $patchinfo
2947                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2948 }
2949
2950
2951 sub git_difftree_body {
2952         my ($difftree, $hash, @parents) = @_;
2953         my ($parent) = $parents[0];
2954         my ($have_blame) = gitweb_check_feature('blame');
2955         print "<div class=\"list_head\">\n";
2956         if ($#{$difftree} > 10) {
2957                 print(($#{$difftree} + 1) . " files changed:\n");
2958         }
2959         print "</div>\n";
2960
2961         print "<table class=\"" .
2962               (@parents > 1 ? "combined " : "") .
2963               "diff_tree\">\n";
2964
2965         # header only for combined diff in 'commitdiff' view
2966         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2967         if ($has_header) {
2968                 # table header
2969                 print "<thead><tr>\n" .
2970                        "<th></th><th></th>\n"; # filename, patchN link
2971                 for (my $i = 0; $i < @parents; $i++) {
2972                         my $par = $parents[$i];
2973                         print "<th>" .
2974                               $cgi->a({-href => href(action=>"commitdiff",
2975                                                      hash=>$hash, hash_parent=>$par),
2976                                        -title => 'commitdiff to parent number ' .
2977                                                   ($i+1) . ': ' . substr($par,0,7)},
2978                                       $i+1) .
2979                               "&nbsp;</th>\n";
2980                 }
2981                 print "</tr></thead>\n<tbody>\n";
2982         }
2983
2984         my $alternate = 1;
2985         my $patchno = 0;
2986         foreach my $line (@{$difftree}) {
2987                 my $diff = parsed_difftree_line($line);
2988
2989                 if ($alternate) {
2990                         print "<tr class=\"dark\">\n";
2991                 } else {
2992                         print "<tr class=\"light\">\n";
2993                 }
2994                 $alternate ^= 1;
2995
2996                 if (exists $diff->{'nparents'}) { # combined diff
2997
2998                         fill_from_file_info($diff, @parents)
2999                                 unless exists $diff->{'from_file'};
3000
3001                         if (!is_deleted($diff)) {
3002                                 # file exists in the result (child) commit
3003                                 print "<td>" .
3004                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3005                                                              file_name=>$diff->{'to_file'},
3006                                                              hash_base=>$hash),
3007                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3008                                       "</td>\n";
3009                         } else {
3010                                 print "<td>" .
3011                                       esc_path($diff->{'to_file'}) .
3012                                       "</td>\n";
3013                         }
3014
3015                         if ($action eq 'commitdiff') {
3016                                 # link to patch
3017                                 $patchno++;
3018                                 print "<td class=\"link\">" .
3019                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3020                                       " | " .
3021                                       "</td>\n";
3022                         }
3023
3024                         my $has_history = 0;
3025                         my $not_deleted = 0;
3026                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3027                                 my $hash_parent = $parents[$i];
3028                                 my $from_hash = $diff->{'from_id'}[$i];
3029                                 my $from_path = $diff->{'from_file'}[$i];
3030                                 my $status = $diff->{'status'}[$i];
3031
3032                                 $has_history ||= ($status ne 'A');
3033                                 $not_deleted ||= ($status ne 'D');
3034
3035                                 if ($status eq 'A') {
3036                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3037                                 } elsif ($status eq 'D') {
3038                                         print "<td class=\"link\">" .
3039                                               $cgi->a({-href => href(action=>"blob",
3040                                                                      hash_base=>$hash,
3041                                                                      hash=>$from_hash,
3042                                                                      file_name=>$from_path)},
3043                                                       "blob" . ($i+1)) .
3044                                               " | </td>\n";
3045                                 } else {
3046                                         if ($diff->{'to_id'} eq $from_hash) {
3047                                                 print "<td class=\"link nochange\">";
3048                                         } else {
3049                                                 print "<td class=\"link\">";
3050                                         }
3051                                         print $cgi->a({-href => href(action=>"blobdiff",
3052                                                                      hash=>$diff->{'to_id'},
3053                                                                      hash_parent=>$from_hash,
3054                                                                      hash_base=>$hash,
3055                                                                      hash_parent_base=>$hash_parent,
3056                                                                      file_name=>$diff->{'to_file'},
3057                                                                      file_parent=>$from_path)},
3058                                                       "diff" . ($i+1)) .
3059                                               " | </td>\n";
3060                                 }
3061                         }
3062
3063                         print "<td class=\"link\">";
3064                         if ($not_deleted) {
3065                                 print $cgi->a({-href => href(action=>"blob",
3066                                                              hash=>$diff->{'to_id'},
3067                                                              file_name=>$diff->{'to_file'},
3068                                                              hash_base=>$hash)},
3069                                               "blob");
3070                                 print " | " if ($has_history);
3071                         }
3072                         if ($has_history) {
3073                                 print $cgi->a({-href => href(action=>"history",
3074                                                              file_name=>$diff->{'to_file'},
3075                                                              hash_base=>$hash)},
3076                                               "history");
3077                         }
3078                         print "</td>\n";
3079
3080                         print "</tr>\n";
3081                         next; # instead of 'else' clause, to avoid extra indent
3082                 }
3083                 # else ordinary diff
3084
3085                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3086                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3087                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3088                         $to_mode_oct = oct $diff->{'to_mode'};
3089                         if (S_ISREG($to_mode_oct)) { # only for regular file
3090                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3091                         }
3092                         $to_file_type = file_type($diff->{'to_mode'});
3093                 }
3094                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3095                         $from_mode_oct = oct $diff->{'from_mode'};
3096                         if (S_ISREG($to_mode_oct)) { # only for regular file
3097                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3098                         }
3099                         $from_file_type = file_type($diff->{'from_mode'});
3100                 }
3101
3102                 if ($diff->{'status'} eq "A") { # created
3103                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3104                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3105                         $mode_chng   .= "]</span>";
3106                         print "<td>";
3107                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3108                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3109                                       -class => "list"}, esc_path($diff->{'file'}));
3110                         print "</td>\n";
3111                         print "<td>$mode_chng</td>\n";
3112                         print "<td class=\"link\">";
3113                         if ($action eq 'commitdiff') {
3114                                 # link to patch
3115                                 $patchno++;
3116                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3117                                 print " | ";
3118                         }
3119                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3120                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3121                                       "blob");
3122                         print "</td>\n";
3123
3124                 } elsif ($diff->{'status'} eq "D") { # deleted
3125                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3126                         print "<td>";
3127                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3128                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3129                                        -class => "list"}, esc_path($diff->{'file'}));
3130                         print "</td>\n";
3131                         print "<td>$mode_chng</td>\n";
3132                         print "<td class=\"link\">";
3133                         if ($action eq 'commitdiff') {
3134                                 # link to patch
3135                                 $patchno++;
3136                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3137                                 print " | ";
3138                         }
3139                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3140                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3141                                       "blob") . " | ";
3142                         if ($have_blame) {
3143                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3144                                                              file_name=>$diff->{'file'})},
3145                                               "blame") . " | ";
3146                         }
3147                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3148                                                      file_name=>$diff->{'file'})},
3149                                       "history");
3150                         print "</td>\n";
3151
3152                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3153                         my $mode_chnge = "";
3154                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3155                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3156                                 if ($from_file_type ne $to_file_type) {
3157                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3158                                 }
3159                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3160                                         if ($from_mode_str && $to_mode_str) {
3161                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3162                                         } elsif ($to_mode_str) {
3163                                                 $mode_chnge .= " mode: $to_mode_str";
3164                                         }
3165                                 }
3166                                 $mode_chnge .= "]</span>\n";
3167                         }
3168                         print "<td>";
3169                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3170                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3171                                       -class => "list"}, esc_path($diff->{'file'}));
3172                         print "</td>\n";
3173                         print "<td>$mode_chnge</td>\n";
3174                         print "<td class=\"link\">";
3175                         if ($action eq 'commitdiff') {
3176                                 # link to patch
3177                                 $patchno++;
3178                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3179                                       " | ";
3180                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3181                                 # "commit" view and modified file (not onlu mode changed)
3182                                 print $cgi->a({-href => href(action=>"blobdiff",
3183                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3184                                                              hash_base=>$hash, hash_parent_base=>$parent,
3185                                                              file_name=>$diff->{'file'})},
3186                                               "diff") .
3187                                       " | ";
3188                         }
3189                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3190                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3191                                        "blob") . " | ";
3192                         if ($have_blame) {
3193                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3194                                                              file_name=>$diff->{'file'})},
3195                                               "blame") . " | ";
3196                         }
3197                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3198                                                      file_name=>$diff->{'file'})},
3199                                       "history");
3200                         print "</td>\n";
3201
3202                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3203                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3204                         my $nstatus = $status_name{$diff->{'status'}};
3205                         my $mode_chng = "";
3206                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3207                                 # mode also for directories, so we cannot use $to_mode_str
3208                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3209                         }
3210                         print "<td>" .
3211                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3212                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3213                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3214                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3215                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3216                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3217                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3218                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3219                               "<td class=\"link\">";
3220                         if ($action eq 'commitdiff') {
3221                                 # link to patch
3222                                 $patchno++;
3223                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3224                                       " | ";
3225                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3226                                 # "commit" view and modified file (not only pure rename or copy)
3227                                 print $cgi->a({-href => href(action=>"blobdiff",
3228                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3229                                                              hash_base=>$hash, hash_parent_base=>$parent,
3230                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3231                                               "diff") .
3232                                       " | ";
3233                         }
3234                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3235                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3236                                       "blob") . " | ";
3237                         if ($have_blame) {
3238                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3239                                                              file_name=>$diff->{'to_file'})},
3240                                               "blame") . " | ";
3241                         }
3242                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3243                                                     file_name=>$diff->{'to_file'})},
3244                                       "history");
3245                         print "</td>\n";
3246
3247                 } # we should not encounter Unmerged (U) or Unknown (X) status
3248                 print "</tr>\n";
3249         }
3250         print "</tbody>" if $has_header;
3251         print "</table>\n";
3252 }
3253
3254 sub git_patchset_body {
3255         my ($fd, $difftree, $hash, @hash_parents) = @_;
3256         my ($hash_parent) = $hash_parents[0];
3257
3258         my $is_combined = (@hash_parents > 1);
3259         my $patch_idx = 0;
3260         my $patch_number = 0;
3261         my $patch_line;
3262         my $diffinfo;
3263         my $to_name;
3264         my (%from, %to);
3265
3266         print "<div class=\"patchset\">\n";
3267
3268         # skip to first patch
3269         while ($patch_line = <$fd>) {
3270                 chomp $patch_line;
3271
3272                 last if ($patch_line =~ m/^diff /);
3273         }
3274
3275  PATCH:
3276         while ($patch_line) {
3277
3278                 # parse "git diff" header line
3279                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3280                         # $1 is from_name, which we do not use
3281                         $to_name = unquote($2);
3282                         $to_name =~ s!^b/!!;
3283                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3284                         # $1 is 'cc' or 'combined', which we do not use
3285                         $to_name = unquote($2);
3286                 } else {
3287                         $to_name = undef;
3288                 }
3289
3290                 # check if current patch belong to current raw line
3291                 # and parse raw git-diff line if needed
3292                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3293                         # this is continuation of a split patch
3294                         print "<div class=\"patch cont\">\n";
3295                 } else {
3296                         # advance raw git-diff output if needed
3297                         $patch_idx++ if defined $diffinfo;
3298
3299                         # read and prepare patch information
3300                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3301
3302                         # compact combined diff output can have some patches skipped
3303                         # find which patch (using pathname of result) we are at now;
3304                         if ($is_combined) {
3305                                 while ($to_name ne $diffinfo->{'to_file'}) {
3306                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3307                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3308                                               "</div>\n";  # class="patch"
3309
3310                                         $patch_idx++;
3311                                         $patch_number++;
3312
3313                                         last if $patch_idx > $#$difftree;
3314                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3315                                 }
3316                         }
3317
3318                         # modifies %from, %to hashes
3319                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3320
3321                         # this is first patch for raw difftree line with $patch_idx index
3322                         # we index @$difftree array from 0, but number patches from 1
3323                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3324                 }
3325
3326                 # git diff header
3327                 #assert($patch_line =~ m/^diff /) if DEBUG;
3328                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3329                 $patch_number++;
3330                 # print "git diff" header
3331                 print format_git_diff_header_line($patch_line, $diffinfo,
3332                                                   \%from, \%to);
3333
3334                 # print extended diff header
3335                 print "<div class=\"diff extended_header\">\n";
3336         EXTENDED_HEADER:
3337                 while ($patch_line = <$fd>) {
3338                         chomp $patch_line;
3339
3340                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3341
3342                         print format_extended_diff_header_line($patch_line, $diffinfo,
3343                                                                \%from, \%to);
3344                 }
3345                 print "</div>\n"; # class="diff extended_header"
3346
3347                 # from-file/to-file diff header
3348                 if (! $patch_line) {
3349                         print "</div>\n"; # class="patch"
3350                         last PATCH;
3351                 }
3352                 next PATCH if ($patch_line =~ m/^diff /);
3353                 #assert($patch_line =~ m/^---/) if DEBUG;
3354
3355                 my $last_patch_line = $patch_line;
3356                 $patch_line = <$fd>;
3357                 chomp $patch_line;
3358                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3359
3360                 print format_diff_from_to_header($last_patch_line, $patch_line,
3361                                                  $diffinfo, \%from, \%to,
3362                                                  @hash_parents);
3363
3364                 # the patch itself
3365         LINE:
3366                 while ($patch_line = <$fd>) {
3367                         chomp $patch_line;
3368
3369                         next PATCH if ($patch_line =~ m/^diff /);
3370
3371                         print format_diff_line($patch_line, \%from, \%to);
3372                 }
3373
3374         } continue {
3375                 print "</div>\n"; # class="patch"
3376         }
3377
3378         # for compact combined (--cc) format, with chunk and patch simpliciaction
3379         # patchset might be empty, but there might be unprocessed raw lines
3380         for (++$patch_idx if $patch_number > 0;
3381              $patch_idx < @$difftree;
3382              ++$patch_idx) {
3383                 # read and prepare patch information
3384                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3385
3386                 # generate anchor for "patch" links in difftree / whatchanged part
3387                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3388                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3389                       "</div>\n";  # class="patch"
3390
3391                 $patch_number++;
3392         }
3393
3394         if ($patch_number == 0) {
3395                 if (@hash_parents > 1) {
3396                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3397                 } else {
3398                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3399                 }
3400         }
3401
3402         print "</div>\n"; # class="patchset"
3403 }
3404
3405 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3406
3407 sub git_project_list_body {
3408         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3409
3410         my ($check_forks) = gitweb_check_feature('forks');
3411
3412         my @projects;
3413         foreach my $pr (@$projlist) {
3414                 my (@aa) = git_get_last_activity($pr->{'path'});
3415                 unless (@aa) {
3416                         next;
3417                 }
3418                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3419                 if (!defined $pr->{'descr'}) {
3420                         my $descr = git_get_project_description($pr->{'path'}) || "";
3421                         $pr->{'descr_long'} = to_utf8($descr);
3422                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3423                 }
3424                 if (!defined $pr->{'owner'}) {
3425                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3426                 }
3427                 if ($check_forks) {
3428                         my $pname = $pr->{'path'};
3429                         if (($pname =~ s/\.git$//) &&
3430                             ($pname !~ /\/$/) &&
3431                             (-d "$projectroot/$pname")) {
3432                                 $pr->{'forks'} = "-d $projectroot/$pname";
3433                         }
3434                         else {
3435                                 $pr->{'forks'} = 0;
3436                         }
3437                 }
3438                 push @projects, $pr;
3439         }
3440
3441         $order ||= $default_projects_order;
3442         $from = 0 unless defined $from;
3443         $to = $#projects if (!defined $to || $#projects < $to);
3444
3445         print "<table class=\"project_list\">\n";
3446         unless ($no_header) {
3447                 print "<tr>\n";
3448                 if ($check_forks) {
3449                         print "<th></th>\n";
3450                 }
3451                 if ($order eq "project") {
3452                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3453                         print "<th>Project</th>\n";
3454                 } else {
3455                         print "<th>" .
3456                               $cgi->a({-href => href(project=>undef, order=>'project'),
3457                                        -class => "header"}, "Project") .
3458                               "</th>\n";
3459                 }
3460                 if ($order eq "descr") {
3461                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3462                         print "<th>Description</th>\n";
3463                 } else {
3464                         print "<th>" .
3465                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3466                                        -class => "header"}, "Description") .
3467                               "</th>\n";
3468                 }
3469                 if ($order eq "owner") {
3470                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3471                         print "<th>Owner</th>\n";
3472                 } else {
3473                         print "<th>" .
3474                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3475                                        -class => "header"}, "Owner") .
3476                               "</th>\n";
3477                 }
3478                 if ($order eq "age") {
3479                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3480                         print "<th>Last Change</th>\n";
3481                 } else {
3482                         print "<th>" .
3483                               $cgi->a({-href => href(project=>undef, order=>'age'),
3484                                        -class => "header"}, "Last Change") .
3485                               "</th>\n";
3486                 }
3487                 print "<th></th>\n" .
3488                       "</tr>\n";
3489         }
3490         my $alternate = 1;
3491         for (my $i = $from; $i <= $to; $i++) {
3492                 my $pr = $projects[$i];
3493                 if ($alternate) {
3494                         print "<tr class=\"dark\">\n";
3495                 } else {
3496                         print "<tr class=\"light\">\n";
3497                 }
3498                 $alternate ^= 1;
3499                 if ($check_forks) {
3500                         print "<td>";
3501                         if ($pr->{'forks'}) {
3502                                 print "<!-- $pr->{'forks'} -->\n";
3503                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3504                         }
3505                         print "</td>\n";
3506                 }
3507                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3508                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3509                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3510                                         -class => "list", -title => $pr->{'descr_long'}},
3511                                         esc_html($pr->{'descr'})) . "</td>\n" .
3512                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3513                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3514                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3515                       "<td class=\"link\">" .
3516                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3517                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3518                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3519                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3520                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3521                       "</td>\n" .
3522                       "</tr>\n";
3523         }
3524         if (defined $extra) {
3525                 print "<tr>\n";
3526                 if ($check_forks) {
3527                         print "<td></td>\n";
3528                 }
3529                 print "<td colspan=\"5\">$extra</td>\n" .
3530                       "</tr>\n";
3531         }
3532         print "</table>\n";
3533 }
3534
3535 sub git_shortlog_body {
3536         # uses global variable $project
3537         my ($commitlist, $from, $to, $refs, $extra) = @_;
3538
3539         $from = 0 unless defined $from;
3540         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3541
3542         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3543         my $alternate = 1;
3544         for (my $i = $from; $i <= $to; $i++) {
3545                 my %co = %{$commitlist->[$i]};
3546                 my $commit = $co{'id'};
3547                 my $ref = format_ref_marker($refs, $commit);
3548                 if ($alternate) {
3549                         print "<tr class=\"dark\">\n";
3550                 } else {
3551                         print "<tr class=\"light\">\n";
3552                 }
3553                 $alternate ^= 1;
3554                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3555                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3556                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3557                       "<td><i>" . $author . "</i></td>\n" .
3558                       "<td>";
3559                 print format_subject_html($co{'title'}, $co{'title_short'},
3560                                           href(action=>"commit", hash=>$commit), $ref);
3561                 print "</td>\n" .
3562                       "<td class=\"link\">" .
3563                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3564                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3565                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3566                 my $snapshot_links = format_snapshot_links($commit);
3567                 if (defined $snapshot_links) {
3568                         print " | " . $snapshot_links;
3569                 }
3570                 print "</td>\n" .
3571                       "</tr>\n";
3572         }
3573         if (defined $extra) {
3574                 print "<tr>\n" .
3575                       "<td colspan=\"4\">$extra</td>\n" .
3576                       "</tr>\n";
3577         }
3578         print "</table>\n";
3579 }
3580
3581 sub git_history_body {
3582         # Warning: assumes constant type (blob or tree) during history
3583         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3584
3585         $from = 0 unless defined $from;
3586         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3587
3588         print "<table class=\"history\" cellspacing=\"0\">\n";
3589         my $alternate = 1;
3590         for (my $i = $from; $i <= $to; $i++) {
3591                 my %co = %{$commitlist->[$i]};
3592                 if (!%co) {
3593                         next;
3594                 }
3595                 my $commit = $co{'id'};
3596
3597                 my $ref = format_ref_marker($refs, $commit);
3598
3599                 if ($alternate) {
3600                         print "<tr class=\"dark\">\n";
3601                 } else {
3602                         print "<tr class=\"light\">\n";
3603                 }
3604                 $alternate ^= 1;
3605         # shortlog uses      chop_str($co{'author_name'}, 10)
3606                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3607                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3608                       "<td><i>" . $author . "</i></td>\n" .
3609                       "<td>";
3610                 # originally git_history used chop_str($co{'title'}, 50)
3611                 print format_subject_html($co{'title'}, $co{'title_short'},
3612                                           href(action=>"commit", hash=>$commit), $ref);
3613                 print "</td>\n" .
3614                       "<td class=\"link\">" .
3615                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3616                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3617
3618                 if ($ftype eq 'blob') {
3619                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3620                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3621                         if (defined $blob_current && defined $blob_parent &&
3622                                         $blob_current ne $blob_parent) {
3623                                 print " | " .
3624                                         $cgi->a({-href => href(action=>"blobdiff",
3625                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3626                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3627                                                                file_name=>$file_name)},
3628                                                 "diff to current");
3629                         }
3630                 }
3631                 print "</td>\n" .
3632                       "</tr>\n";
3633         }
3634         if (defined $extra) {
3635                 print "<tr>\n" .
3636                       "<td colspan=\"4\">$extra</td>\n" .
3637                       "</tr>\n";
3638         }
3639         print "</table>\n";
3640 }
3641
3642 sub git_tags_body {
3643         # uses global variable $project
3644         my ($taglist, $from, $to, $extra) = @_;
3645         $from = 0 unless defined $from;
3646         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3647
3648         print "<table class=\"tags\" cellspacing=\"0\">\n";
3649         my $alternate = 1;
3650         for (my $i = $from; $i <= $to; $i++) {
3651                 my $entry = $taglist->[$i];
3652                 my %tag = %$entry;
3653                 my $comment = $tag{'subject'};
3654                 my $comment_short;
3655                 if (defined $comment) {
3656                         $comment_short = chop_str($comment, 30, 5);
3657                 }
3658                 if ($alternate) {
3659                         print "<tr class=\"dark\">\n";
3660                 } else {
3661                         print "<tr class=\"light\">\n";
3662                 }
3663                 $alternate ^= 1;
3664                 if (defined $tag{'age'}) {
3665                         print "<td><i>$tag{'age'}</i></td>\n";
3666                 } else {
3667                         print "<td></td>\n";
3668                 }
3669                 print "<td>" .
3670                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3671                                -class => "list name"}, esc_html($tag{'name'})) .
3672                       "</td>\n" .
3673                       "<td>";
3674                 if (defined $comment) {
3675                         print format_subject_html($comment, $comment_short,
3676                                                   href(action=>"tag", hash=>$tag{'id'}));
3677                 }
3678                 print "</td>\n" .
3679                       "<td class=\"selflink\">";
3680                 if ($tag{'type'} eq "tag") {
3681                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3682                 } else {
3683                         print "&nbsp;";
3684                 }
3685                 print "</td>\n" .
3686                       "<td class=\"link\">" . " | " .
3687                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3688                 if ($tag{'reftype'} eq "commit") {
3689                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3690                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3691                 } elsif ($tag{'reftype'} eq "blob") {
3692                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3693                 }
3694                 print "</td>\n" .
3695                       "</tr>";
3696         }
3697         if (defined $extra) {
3698                 print "<tr>\n" .
3699                       "<td colspan=\"5\">$extra</td>\n" .
3700                       "</tr>\n";
3701         }
3702         print "</table>\n";
3703 }
3704
3705 sub git_heads_body {
3706         # uses global variable $project
3707         my ($headlist, $head, $from, $to, $extra) = @_;
3708         $from = 0 unless defined $from;
3709         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3710
3711         print "<table class=\"heads\" cellspacing=\"0\">\n";
3712         my $alternate = 1;
3713         for (my $i = $from; $i <= $to; $i++) {
3714                 my $entry = $headlist->[$i];
3715                 my %ref = %$entry;
3716                 my $curr = $ref{'id'} eq $head;
3717                 if ($alternate) {
3718                         print "<tr class=\"dark\">\n";
3719                 } else {
3720                         print "<tr class=\"light\">\n";
3721                 }
3722                 $alternate ^= 1;
3723                 print "<td><i>$ref{'age'}</i></td>\n" .
3724                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3725                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3726                                -class => "list name"},esc_html($ref{'name'})) .
3727                       "</td>\n" .
3728                       "<td class=\"link\">" .
3729                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3730                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3731                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3732                       "</td>\n" .
3733                       "</tr>";
3734         }
3735         if (defined $extra) {
3736                 print "<tr>\n" .
3737                       "<td colspan=\"3\">$extra</td>\n" .
3738                       "</tr>\n";
3739         }
3740         print "</table>\n";
3741 }
3742
3743 sub git_search_grep_body {
3744         my ($commitlist, $from, $to, $extra) = @_;
3745         $from = 0 unless defined $from;
3746         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3747
3748         print "<table class=\"grep\" cellspacing=\"0\">\n";
3749         my $alternate = 1;
3750         for (my $i = $from; $i <= $to; $i++) {
3751                 my %co = %{$commitlist->[$i]};
3752                 if (!%co) {
3753                         next;
3754                 }
3755                 my $commit = $co{'id'};
3756                 if ($alternate) {
3757                         print "<tr class=\"dark\">\n";
3758                 } else {
3759                         print "<tr class=\"light\">\n";
3760                 }
3761                 $alternate ^= 1;
3762                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3763                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3764                       "<td><i>" . $author . "</i></td>\n" .
3765                       "<td>" .
3766                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3767                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3768                 my $comment = $co{'comment'};
3769                 foreach my $line (@$comment) {
3770                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3771                                 my $lead = esc_html($1) || "";
3772                                 $lead = chop_str($lead, 30, 10);
3773                                 my $match = esc_html($2) || "";
3774                                 my $trail = esc_html($3) || "";
3775                                 $trail = chop_str($trail, 30, 10);
3776                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3777                                 print chop_str($text, 80, 5) . "<br/>\n";
3778                         }
3779                 }
3780                 print "</td>\n" .
3781                       "<td class=\"link\">" .
3782                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3783                       " | " .
3784                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3785                 print "</td>\n" .
3786                       "</tr>\n";
3787         }
3788         if (defined $extra) {
3789                 print "<tr>\n" .
3790                       "<td colspan=\"3\">$extra</td>\n" .
3791                       "</tr>\n";
3792         }
3793         print "</table>\n";
3794 }
3795
3796 ## ======================================================================
3797 ## ======================================================================
3798 ## actions
3799
3800 sub git_project_list {
3801         my $order = $cgi->param('o');
3802         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3803                 die_error(undef, "Unknown order parameter");
3804         }
3805
3806         my @list = git_get_projects_list();
3807         if (!@list) {
3808                 die_error(undef, "No projects found");
3809         }
3810
3811         git_header_html();
3812         if (-f $home_text) {
3813                 print "<div class=\"index_include\">\n";
3814                 open (my $fd, $home_text);
3815                 print <$fd>;
3816                 close $fd;
3817                 print "</div>\n";
3818         }
3819         git_project_list_body(\@list, $order);
3820         git_footer_html();
3821 }
3822
3823 sub git_forks {
3824         my $order = $cgi->param('o');
3825         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3826                 die_error(undef, "Unknown order parameter");
3827         }
3828
3829         my @list = git_get_projects_list($project);
3830         if (!@list) {
3831                 die_error(undef, "No forks found");
3832         }
3833
3834         git_header_html();
3835         git_print_page_nav('','');
3836         git_print_header_div('summary', "$project forks");
3837         git_project_list_body(\@list, $order);
3838         git_footer_html();
3839 }
3840
3841 sub git_project_index {
3842         my @projects = git_get_projects_list($project);
3843
3844         print $cgi->header(
3845                 -type => 'text/plain',
3846                 -charset => 'utf-8',
3847                 -content_disposition => 'inline; filename="index.aux"');
3848
3849         foreach my $pr (@projects) {
3850                 if (!exists $pr->{'owner'}) {
3851                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3852                 }
3853
3854                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3855                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3856                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3857                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3858                 $path  =~ s/ /\+/g;
3859                 $owner =~ s/ /\+/g;
3860
3861                 print "$path $owner\n";
3862         }
3863 }
3864
3865 sub git_summary {
3866         my $descr = git_get_project_description($project) || "none";
3867         my %co = parse_commit("HEAD");
3868         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3869         my $head = $co{'id'};
3870
3871         my $owner = git_get_project_owner($project);
3872
3873         my $refs = git_get_references();
3874         # These get_*_list functions return one more to allow us to see if
3875         # there are more ...
3876         my @taglist  = git_get_tags_list(16);
3877         my @headlist = git_get_heads_list(16);
3878         my @forklist;
3879         my ($check_forks) = gitweb_check_feature('forks');
3880
3881         if ($check_forks) {
3882                 @forklist = git_get_projects_list($project);
3883         }
3884
3885         git_header_html();
3886         git_print_page_nav('summary','', $head);
3887
3888         print "<div class=\"title\">&nbsp;</div>\n";
3889         print "<table cellspacing=\"0\">\n" .
3890               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3891               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3892         if (defined $cd{'rfc2822'}) {
3893                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3894         }
3895
3896         # use per project git URL list in $projectroot/$project/cloneurl
3897         # or make project git URL from git base URL and project name
3898         my $url_tag = "URL";
3899         my @url_list = git_get_project_url_list($project);
3900         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3901         foreach my $git_url (@url_list) {
3902                 next unless $git_url;
3903                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3904                 $url_tag = "";
3905         }
3906         print "</table>\n";
3907
3908         if (-s "$projectroot/$project/README.html") {
3909                 if (open my $fd, "$projectroot/$project/README.html") {
3910                         print "<div class=\"title\">readme</div>\n";
3911                         print $_ while (<$fd>);
3912                         close $fd;
3913                 }
3914         }
3915
3916         # we need to request one more than 16 (0..15) to check if
3917         # those 16 are all
3918         my @commitlist = $head ? parse_commits($head, 17) : ();
3919         if (@commitlist) {
3920                 git_print_header_div('shortlog');
3921                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3922                                   $#commitlist <=  15 ? undef :
3923                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3924         }
3925
3926         if (@taglist) {
3927                 git_print_header_div('tags');
3928                 git_tags_body(\@taglist, 0, 15,
3929                               $#taglist <=  15 ? undef :
3930                               $cgi->a({-href => href(action=>"tags")}, "..."));
3931         }
3932
3933         if (@headlist) {
3934                 git_print_header_div('heads');
3935                 git_heads_body(\@headlist, $head, 0, 15,
3936                                $#headlist <= 15 ? undef :
3937                                $cgi->a({-href => href(action=>"heads")}, "..."));
3938         }
3939
3940         if (@forklist) {
3941                 git_print_header_div('forks');
3942                 git_project_list_body(\@forklist, undef, 0, 15,
3943                                       $#forklist <= 15 ? undef :
3944                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3945                                       'noheader');
3946         }
3947
3948         git_footer_html();
3949 }
3950
3951 sub git_tag {
3952         my $head = git_get_head_hash($project);
3953         git_header_html();
3954         git_print_page_nav('','', $head,undef,$head);
3955         my %tag = parse_tag($hash);
3956
3957         if (! %tag) {
3958                 die_error(undef, "Unknown tag object");
3959         }
3960
3961         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3962         print "<div class=\"title_text\">\n" .
3963               "<table cellspacing=\"0\">\n" .
3964               "<tr>\n" .
3965               "<td>object</td>\n" .
3966               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3967                                $tag{'object'}) . "</td>\n" .
3968               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3969                                               $tag{'type'}) . "</td>\n" .
3970               "</tr>\n";
3971         if (defined($tag{'author'})) {
3972                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3973                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3974                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3975                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3976                         "</td></tr>\n";
3977         }
3978         print "</table>\n\n" .
3979               "</div>\n";
3980         print "<div class=\"page_body\">";
3981         my $comment = $tag{'comment'};
3982         foreach my $line (@$comment) {
3983                 chomp $line;
3984                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3985         }
3986         print "</div>\n";
3987         git_footer_html();
3988 }
3989
3990 sub git_blame2 {
3991         my $fd;
3992         my $ftype;
3993
3994         my ($have_blame) = gitweb_check_feature('blame');
3995         if (!$have_blame) {
3996                 die_error('403 Permission denied', "Permission denied");
3997         }
3998         die_error('404 Not Found', "File name not defined") if (!$file_name);
3999         $hash_base ||= git_get_head_hash($project);
4000         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4001         my %co = parse_commit($hash_base)
4002                 or die_error(undef, "Reading commit failed");
4003         if (!defined $hash) {
4004                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4005                         or die_error(undef, "Error looking up file");
4006         }
4007         $ftype = git_get_type($hash);
4008         if ($ftype !~ "blob") {
4009                 die_error('400 Bad Request', "Object is not a blob");
4010         }
4011         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4012               $file_name, $hash_base)
4013                 or die_error(undef, "Open git-blame failed");
4014         git_header_html();
4015         my $formats_nav =
4016                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4017                         "blob") .
4018                 " | " .
4019                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4020                         "history") .
4021                 " | " .
4022                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4023                         "HEAD");
4024         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4025         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4026         git_print_page_path($file_name, $ftype, $hash_base);
4027         my @rev_color = (qw(light2 dark2));
4028         my $num_colors = scalar(@rev_color);
4029         my $current_color = 0;
4030         my $last_rev;
4031         print <<HTML;
4032 <div class="page_body">
4033 <table class="blame">
4034 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4035 HTML
4036         my %metainfo = ();
4037         while (1) {
4038                 $_ = <$fd>;
4039                 last unless defined $_;
4040                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4041                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4042                 if (!exists $metainfo{$full_rev}) {
4043                         $metainfo{$full_rev} = {};
4044                 }
4045                 my $meta = $metainfo{$full_rev};
4046                 while (<$fd>) {
4047                         last if (s/^\t//);
4048                         if (/^(\S+) (.*)$/) {
4049                                 $meta->{$1} = $2;
4050                         }
4051                 }
4052                 my $data = $_;
4053                 chomp $data;
4054                 my $rev = substr($full_rev, 0, 8);
4055                 my $author = $meta->{'author'};
4056                 my %date = parse_date($meta->{'author-time'},
4057                                       $meta->{'author-tz'});
4058                 my $date = $date{'iso-tz'};
4059                 if ($group_size) {
4060                         $current_color = ++$current_color % $num_colors;
4061                 }
4062                 print "<tr class=\"$rev_color[$current_color]\">\n";
4063                 if ($group_size) {
4064                         print "<td class=\"sha1\"";
4065                         print " title=\"". esc_html($author) . ", $date\"";
4066                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4067                         print ">";
4068                         print $cgi->a({-href => href(action=>"commit",
4069                                                      hash=>$full_rev,
4070                                                      file_name=>$file_name)},
4071                                       esc_html($rev));
4072                         print "</td>\n";
4073                 }
4074                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4075                         or die_error(undef, "Open git-rev-parse failed");
4076                 my $parent_commit = <$dd>;
4077                 close $dd;
4078                 chomp($parent_commit);
4079                 my $blamed = href(action => 'blame',
4080                                   file_name => $meta->{'filename'},
4081                                   hash_base => $parent_commit);
4082                 print "<td class=\"linenr\">";
4083                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4084                                 -id => "l$lineno",
4085                                 -class => "linenr" },
4086                               esc_html($lineno));
4087                 print "</td>";
4088                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4089                 print "</tr>\n";
4090         }
4091         print "</table>\n";
4092         print "</div>";
4093         close $fd
4094                 or print "Reading blob failed\n";
4095         git_footer_html();
4096 }
4097
4098 sub git_blame {
4099         my $fd;
4100
4101         my ($have_blame) = gitweb_check_feature('blame');
4102         if (!$have_blame) {
4103                 die_error('403 Permission denied', "Permission denied");
4104         }
4105         die_error('404 Not Found', "File name not defined") if (!$file_name);
4106         $hash_base ||= git_get_head_hash($project);
4107         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4108         my %co = parse_commit($hash_base)
4109                 or die_error(undef, "Reading commit failed");
4110         if (!defined $hash) {
4111                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4112                         or die_error(undef, "Error lookup file");
4113         }
4114         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4115                 or die_error(undef, "Open git-annotate failed");
4116         git_header_html();
4117         my $formats_nav =
4118                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4119                         "blob") .
4120                 " | " .
4121                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4122                         "history") .
4123                 " | " .
4124                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4125                         "HEAD");
4126         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4127         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4128         git_print_page_path($file_name, 'blob', $hash_base);
4129         print "<div class=\"page_body\">\n";
4130         print <<HTML;
4131 <table class="blame">
4132   <tr>
4133     <th>Commit</th>
4134     <th>Age</th>
4135     <th>Author</th>
4136     <th>Line</th>
4137     <th>Data</th>
4138   </tr>
4139 HTML
4140         my @line_class = (qw(light dark));
4141         my $line_class_len = scalar (@line_class);
4142         my $line_class_num = $#line_class;
4143         while (my $line = <$fd>) {
4144                 my $long_rev;
4145                 my $short_rev;
4146                 my $author;
4147                 my $time;
4148                 my $lineno;
4149                 my $data;
4150                 my $age;
4151                 my $age_str;
4152                 my $age_class;
4153
4154                 chomp $line;
4155                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4156
4157                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4158                         $long_rev = $1;
4159                         $author   = $2;
4160                         $time     = $3;
4161                         $lineno   = $4;
4162                         $data     = $5;
4163                 } else {
4164                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4165                         next;
4166                 }
4167                 $short_rev  = substr ($long_rev, 0, 8);
4168                 $age        = time () - $time;
4169                 $age_str    = age_string ($age);
4170                 $age_str    =~ s/ /&nbsp;/g;
4171                 $age_class  = age_class($age);
4172                 $author     = esc_html ($author);
4173                 $author     =~ s/ /&nbsp;/g;
4174
4175                 $data = untabify($data);
4176                 $data = esc_html ($data);
4177
4178                 print <<HTML;
4179   <tr class="$line_class[$line_class_num]">
4180     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4181     <td class="$age_class">$age_str</td>
4182     <td>$author</td>
4183     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4184     <td class="pre">$data</td>
4185   </tr>
4186 HTML
4187         } # while (my $line = <$fd>)
4188         print "</table>\n\n";
4189         close $fd
4190                 or print "Reading blob failed.\n";
4191         print "</div>";
4192         git_footer_html();
4193 }
4194
4195 sub git_tags {
4196         my $head = git_get_head_hash($project);
4197         git_header_html();
4198         git_print_page_nav('','', $head,undef,$head);
4199         git_print_header_div('summary', $project);
4200
4201         my @tagslist = git_get_tags_list();
4202         if (@tagslist) {
4203                 git_tags_body(\@tagslist);
4204         }
4205         git_footer_html();
4206 }
4207
4208 sub git_heads {
4209         my $head = git_get_head_hash($project);
4210         git_header_html();
4211         git_print_page_nav('','', $head,undef,$head);
4212         git_print_header_div('summary', $project);
4213
4214         my @headslist = git_get_heads_list();
4215         if (@headslist) {
4216                 git_heads_body(\@headslist, $head);
4217         }
4218         git_footer_html();
4219 }
4220
4221 sub git_blob_plain {
4222         my $expires;
4223
4224         if (!defined $hash) {
4225                 if (defined $file_name) {
4226                         my $base = $hash_base || git_get_head_hash($project);
4227                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4228                                 or die_error(undef, "Error lookup file");
4229                 } else {
4230                         die_error(undef, "No file name defined");
4231                 }
4232         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4233                 # blobs defined by non-textual hash id's can be cached
4234                 $expires = "+1d";
4235         }
4236
4237         my $type = shift;
4238         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4239                 or die_error(undef, "Couldn't cat $file_name, $hash");
4240
4241         $type ||= blob_mimetype($fd, $file_name);
4242
4243         # save as filename, even when no $file_name is given
4244         my $save_as = "$hash";
4245         if (defined $file_name) {
4246                 $save_as = $file_name;
4247         } elsif ($type =~ m/^text\//) {
4248                 $save_as .= '.txt';
4249         }
4250
4251         print $cgi->header(
4252                 -type => "$type",
4253                 -expires=>$expires,
4254                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4255         undef $/;
4256         binmode STDOUT, ':raw';
4257         print <$fd>;
4258         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4259         $/ = "\n";
4260         close $fd;
4261 }
4262
4263 sub git_blob {
4264         my $expires;
4265
4266         if (!defined $hash) {
4267                 if (defined $file_name) {
4268                         my $base = $hash_base || git_get_head_hash($project);
4269                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4270                                 or die_error(undef, "Error lookup file");
4271                 } else {
4272                         die_error(undef, "No file name defined");
4273                 }
4274         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4275                 # blobs defined by non-textual hash id's can be cached
4276                 $expires = "+1d";
4277         }
4278
4279         my ($have_blame) = gitweb_check_feature('blame');
4280         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4281                 or die_error(undef, "Couldn't cat $file_name, $hash");
4282         my $mimetype = blob_mimetype($fd, $file_name);
4283         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4284                 close $fd;
4285                 return git_blob_plain($mimetype);
4286         }
4287         # we can have blame only for text/* mimetype
4288         $have_blame &&= ($mimetype =~ m!^text/!);
4289
4290         git_header_html(undef, $expires);
4291         my $formats_nav = '';
4292         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4293                 if (defined $file_name) {
4294                         if ($have_blame) {
4295                                 $formats_nav .=
4296                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4297                                                 "blame") .
4298                                         " | ";
4299                         }
4300                         $formats_nav .=
4301                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4302                                         "history") .
4303                                 " | " .
4304                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4305                                         "raw") .
4306                                 " | " .
4307                                 $cgi->a({-href => href(action=>"blob",
4308                                                        hash_base=>"HEAD", file_name=>$file_name)},
4309                                         "HEAD");
4310                 } else {
4311                         $formats_nav .=
4312                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4313                                         "raw");
4314                 }
4315                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4316                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4317         } else {
4318                 print "<div class=\"page_nav\">\n" .
4319                       "<br/><br/></div>\n" .
4320                       "<div class=\"title\">$hash</div>\n";
4321         }
4322         git_print_page_path($file_name, "blob", $hash_base);
4323         print "<div class=\"page_body\">\n";
4324         if ($mimetype =~ m!^text/!) {
4325                 my $nr;
4326                 while (my $line = <$fd>) {
4327                         chomp $line;
4328                         $nr++;
4329                         $line = untabify($line);
4330                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4331                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4332                 }
4333         } elsif ($mimetype =~ m!^image/!) {
4334                 print qq!<img type="$mimetype"!;
4335                 if ($file_name) {
4336                         print qq! alt="$file_name" title="$file_name"!;
4337                 }
4338                 print qq! src="! .
4339                       href(action=>"blob_plain", hash=>$hash,
4340                            hash_base=>$hash_base, file_name=>$file_name) .
4341                       qq!" />\n!;
4342         }
4343         close $fd
4344                 or print "Reading blob failed.\n";
4345         print "</div>";
4346         git_footer_html();
4347 }
4348
4349 sub git_tree {
4350         if (!defined $hash_base) {
4351                 $hash_base = "HEAD";
4352         }
4353         if (!defined $hash) {
4354                 if (defined $file_name) {
4355                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4356                 } else {
4357                         $hash = $hash_base;
4358                 }
4359         }
4360         $/ = "\0";
4361         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4362                 or die_error(undef, "Open git-ls-tree failed");
4363         my @entries = map { chomp; $_ } <$fd>;
4364         close $fd or die_error(undef, "Reading tree failed");
4365         $/ = "\n";
4366
4367         my $refs = git_get_references();
4368         my $ref = format_ref_marker($refs, $hash_base);
4369         git_header_html();
4370         my $basedir = '';
4371         my ($have_blame) = gitweb_check_feature('blame');
4372         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4373                 my @views_nav = ();
4374                 if (defined $file_name) {
4375                         push @views_nav,
4376                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4377                                         "history"),
4378                                 $cgi->a({-href => href(action=>"tree",
4379                                                        hash_base=>"HEAD", file_name=>$file_name)},
4380                                         "HEAD"),
4381                 }
4382                 my $snapshot_links = format_snapshot_links($hash);
4383                 if (defined $snapshot_links) {
4384                         # FIXME: Should be available when we have no hash base as well.
4385                         push @views_nav, $snapshot_links;
4386                 }
4387                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4388                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4389         } else {
4390                 undef $hash_base;
4391                 print "<div class=\"page_nav\">\n";
4392                 print "<br/><br/></div>\n";
4393                 print "<div class=\"title\">$hash</div>\n";
4394         }
4395         if (defined $file_name) {
4396                 $basedir = $file_name;
4397                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4398                         $basedir .= '/';
4399                 }
4400         }
4401         git_print_page_path($file_name, 'tree', $hash_base);
4402         print "<div class=\"page_body\">\n";
4403         print "<table cellspacing=\"0\">\n";
4404         my $alternate = 1;
4405         # '..' (top directory) link if possible
4406         if (defined $hash_base &&
4407             defined $file_name && $file_name =~ m![^/]+$!) {
4408                 if ($alternate) {
4409                         print "<tr class=\"dark\">\n";
4410                 } else {
4411                         print "<tr class=\"light\">\n";
4412                 }
4413                 $alternate ^= 1;
4414
4415                 my $up = $file_name;
4416                 $up =~ s!/?[^/]+$!!;
4417                 undef $up unless $up;
4418                 # based on git_print_tree_entry
4419                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4420                 print '<td class="list">';
4421                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4422                                              file_name=>$up)},
4423                               "..");
4424                 print "</td>\n";
4425                 print "<td class=\"link\"></td>\n";
4426
4427                 print "</tr>\n";
4428         }
4429         foreach my $line (@entries) {
4430                 my %t = parse_ls_tree_line($line, -z => 1);
4431
4432                 if ($alternate) {
4433                         print "<tr class=\"dark\">\n";
4434                 } else {
4435                         print "<tr class=\"light\">\n";
4436                 }
4437                 $alternate ^= 1;
4438
4439                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4440
4441                 print "</tr>\n";
4442         }
4443         print "</table>\n" .
4444               "</div>";
4445         git_footer_html();
4446 }
4447
4448 sub git_snapshot {
4449         my @supported_fmts = gitweb_check_feature('snapshot');
4450         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4451
4452         my $format = $cgi->param('sf');
4453         if (!@supported_fmts) {
4454                 die_error('403 Permission denied', "Permission denied");
4455         }
4456         # default to first supported snapshot format
4457         $format ||= $supported_fmts[0];
4458         if ($format !~ m/^[a-z0-9]+$/) {
4459                 die_error(undef, "Invalid snapshot format parameter");
4460         } elsif (!exists($known_snapshot_formats{$format})) {
4461                 die_error(undef, "Unknown snapshot format");
4462         } elsif (!grep($_ eq $format, @supported_fmts)) {
4463                 die_error(undef, "Unsupported snapshot format");
4464         }
4465
4466         if (!defined $hash) {
4467                 $hash = git_get_head_hash($project);
4468         }
4469
4470         my $git_command = git_cmd_str();
4471         my $name = $project;
4472         $name =~ s,([^/])/*\.git$,$1,;
4473         $name = basename($name);
4474         my $filename = to_utf8($name);
4475         $name =~ s/\047/\047\\\047\047/g;
4476         my $cmd;
4477         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4478         $cmd = "$git_command archive " .
4479                 "--format=$known_snapshot_formats{$format}{'format'} " .
4480                 "--prefix=\'$name\'/ $hash";
4481         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4482                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4483         }
4484
4485         print $cgi->header(
4486                 -type => $known_snapshot_formats{$format}{'type'},
4487                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4488                 -status => '200 OK');
4489
4490         open my $fd, "-|", $cmd
4491                 or die_error(undef, "Execute git-archive failed");
4492         binmode STDOUT, ':raw';
4493         print <$fd>;
4494         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4495         close $fd;
4496 }
4497
4498 sub git_log {
4499         my $head = git_get_head_hash($project);
4500         if (!defined $hash) {
4501                 $hash = $head;
4502         }
4503         if (!defined $page) {
4504                 $page = 0;
4505         }
4506         my $refs = git_get_references();
4507
4508         my @commitlist = parse_commits($hash, 101, (100 * $page));
4509
4510         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4511
4512         git_header_html();
4513         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4514
4515         if (!@commitlist) {
4516                 my %co = parse_commit($hash);
4517
4518                 git_print_header_div('summary', $project);
4519                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4520         }
4521         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4522         for (my $i = 0; $i <= $to; $i++) {
4523                 my %co = %{$commitlist[$i]};
4524                 next if !%co;
4525                 my $commit = $co{'id'};
4526                 my $ref = format_ref_marker($refs, $commit);
4527                 my %ad = parse_date($co{'author_epoch'});
4528                 git_print_header_div('commit',
4529                                "<span class=\"age\">$co{'age_string'}</span>" .
4530                                esc_html($co{'title'}) . $ref,
4531                                $commit);
4532                 print "<div class=\"title_text\">\n" .
4533                       "<div class=\"log_link\">\n" .
4534                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4535                       " | " .
4536                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4537                       " | " .
4538                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4539                       "<br/>\n" .
4540                       "</div>\n" .
4541                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4542                       "</div>\n";
4543
4544                 print "<div class=\"log_body\">\n";
4545                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4546                 print "</div>\n";
4547         }
4548         if ($#commitlist >= 100) {
4549                 print "<div class=\"page_nav\">\n";
4550                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4551                                -accesskey => "n", -title => "Alt-n"}, "next");
4552                 print "</div>\n";
4553         }
4554         git_footer_html();
4555 }
4556
4557 sub git_commit {
4558         $hash ||= $hash_base || "HEAD";
4559         my %co = parse_commit($hash);
4560         if (!%co) {
4561                 die_error(undef, "Unknown commit object");
4562         }
4563         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4564         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4565
4566         my $parent  = $co{'parent'};
4567         my $parents = $co{'parents'}; # listref
4568
4569         # we need to prepare $formats_nav before any parameter munging
4570         my $formats_nav;
4571         if (!defined $parent) {
4572                 # --root commitdiff
4573                 $formats_nav .= '(initial)';
4574         } elsif (@$parents == 1) {
4575                 # single parent commit
4576                 $formats_nav .=
4577                         '(parent: ' .
4578                         $cgi->a({-href => href(action=>"commit",
4579                                                hash=>$parent)},
4580                                 esc_html(substr($parent, 0, 7))) .
4581                         ')';
4582         } else {
4583                 # merge commit
4584                 $formats_nav .=
4585                         '(merge: ' .
4586                         join(' ', map {
4587                                 $cgi->a({-href => href(action=>"commit",
4588                                                        hash=>$_)},
4589                                         esc_html(substr($_, 0, 7)));
4590                         } @$parents ) .
4591                         ')';
4592         }
4593
4594         if (!defined $parent) {
4595                 $parent = "--root";
4596         }
4597         my @difftree;
4598         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4599                 @diff_opts,
4600                 (@$parents <= 1 ? $parent : '-c'),
4601                 $hash, "--"
4602                 or die_error(undef, "Open git-diff-tree failed");
4603         @difftree = map { chomp; $_ } <$fd>;
4604         close $fd or die_error(undef, "Reading git-diff-tree failed");
4605
4606         # non-textual hash id's can be cached
4607         my $expires;
4608         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4609                 $expires = "+1d";
4610         }
4611         my $refs = git_get_references();
4612         my $ref = format_ref_marker($refs, $co{'id'});
4613
4614         git_header_html(undef, $expires);
4615         git_print_page_nav('commit', '',
4616                            $hash, $co{'tree'}, $hash,
4617                            $formats_nav);
4618
4619         if (defined $co{'parent'}) {
4620                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4621         } else {
4622                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4623         }
4624         print "<div class=\"title_text\">\n" .
4625               "<table cellspacing=\"0\">\n";
4626         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4627               "<tr>" .
4628               "<td></td><td> $ad{'rfc2822'}";
4629         if ($ad{'hour_local'} < 6) {
4630                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4631                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4632         } else {
4633                 printf(" (%02d:%02d %s)",
4634                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4635         }
4636         print "</td>" .
4637               "</tr>\n";
4638         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4639         print "<tr><td></td><td> $cd{'rfc2822'}" .
4640               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4641               "</td></tr>\n";
4642         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4643         print "<tr>" .
4644               "<td>tree</td>" .
4645               "<td class=\"sha1\">" .
4646               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4647                        class => "list"}, $co{'tree'}) .
4648               "</td>" .
4649               "<td class=\"link\">" .
4650               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4651                       "tree");
4652         my $snapshot_links = format_snapshot_links($hash);
4653         if (defined $snapshot_links) {
4654                 print " | " . $snapshot_links;
4655         }
4656         print "</td>" .
4657               "</tr>\n";
4658
4659         foreach my $par (@$parents) {
4660                 print "<tr>" .
4661                       "<td>parent</td>" .
4662                       "<td class=\"sha1\">" .
4663                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4664                                class => "list"}, $par) .
4665                       "</td>" .
4666                       "<td class=\"link\">" .
4667                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4668                       " | " .
4669                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4670                       "</td>" .
4671                       "</tr>\n";
4672         }
4673         print "</table>".
4674               "</div>\n";
4675
4676         print "<div class=\"page_body\">\n";
4677         git_print_log($co{'comment'});
4678         print "</div>\n";
4679
4680         git_difftree_body(\@difftree, $hash, @$parents);
4681
4682         git_footer_html();
4683 }
4684
4685 sub git_object {
4686         # object is defined by:
4687         # - hash or hash_base alone
4688         # - hash_base and file_name
4689         my $type;
4690
4691         # - hash or hash_base alone
4692         if ($hash || ($hash_base && !defined $file_name)) {
4693                 my $object_id = $hash || $hash_base;
4694
4695                 my $git_command = git_cmd_str();
4696                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4697                         or die_error('404 Not Found', "Object does not exist");
4698                 $type = <$fd>;
4699                 chomp $type;
4700                 close $fd
4701                         or die_error('404 Not Found', "Object does not exist");
4702
4703         # - hash_base and file_name
4704         } elsif ($hash_base && defined $file_name) {
4705                 $file_name =~ s,/+$,,;
4706
4707                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4708                         or die_error('404 Not Found', "Base object does not exist");
4709
4710                 # here errors should not hapen
4711                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4712                         or die_error(undef, "Open git-ls-tree failed");
4713                 my $line = <$fd>;
4714                 close $fd;
4715
4716                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4717                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4718                         die_error('404 Not Found', "File or directory for given base does not exist");
4719                 }
4720                 $type = $2;
4721                 $hash = $3;
4722         } else {
4723                 die_error('404 Not Found', "Not enough information to find object");
4724         }
4725
4726         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4727                                           hash=>$hash, hash_base=>$hash_base,
4728                                           file_name=>$file_name),
4729                              -status => '302 Found');
4730 }
4731
4732 sub git_blobdiff {
4733         my $format = shift || 'html';
4734
4735         my $fd;
4736         my @difftree;
4737         my %diffinfo;
4738         my $expires;
4739
4740         # preparing $fd and %diffinfo for git_patchset_body
4741         # new style URI
4742         if (defined $hash_base && defined $hash_parent_base) {
4743                 if (defined $file_name) {
4744                         # read raw output
4745                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4746                                 $hash_parent_base, $hash_base,
4747                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4748                                 or die_error(undef, "Open git-diff-tree failed");
4749                         @difftree = map { chomp; $_ } <$fd>;
4750                         close $fd
4751                                 or die_error(undef, "Reading git-diff-tree failed");
4752                         @difftree
4753                                 or die_error('404 Not Found', "Blob diff not found");
4754
4755                 } elsif (defined $hash &&
4756                          $hash =~ /[0-9a-fA-F]{40}/) {
4757                         # try to find filename from $hash
4758
4759                         # read filtered raw output
4760                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4761                                 $hash_parent_base, $hash_base, "--"
4762                                 or die_error(undef, "Open git-diff-tree failed");
4763                         @difftree =
4764                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4765                                 # $hash == to_id
4766                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4767                                 map { chomp; $_ } <$fd>;
4768                         close $fd
4769                                 or die_error(undef, "Reading git-diff-tree failed");
4770                         @difftree
4771                                 or die_error('404 Not Found', "Blob diff not found");
4772
4773                 } else {
4774                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4775                 }
4776
4777                 if (@difftree > 1) {
4778                         die_error('404 Not Found', "Ambiguous blob diff specification");
4779                 }
4780
4781                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4782                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4783                 $file_name   ||= $diffinfo{'to_file'};
4784
4785                 $hash_parent ||= $diffinfo{'from_id'};
4786                 $hash        ||= $diffinfo{'to_id'};
4787
4788                 # non-textual hash id's can be cached
4789                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4790                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4791                         $expires = '+1d';
4792                 }
4793
4794                 # open patch output
4795                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4796                         '-p', ($format eq 'html' ? "--full-index" : ()),
4797                         $hash_parent_base, $hash_base,
4798                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4799                         or die_error(undef, "Open git-diff-tree failed");
4800         }
4801
4802         # old/legacy style URI
4803         if (!%diffinfo && # if new style URI failed
4804             defined $hash && defined $hash_parent) {
4805                 # fake git-diff-tree raw output
4806                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4807                 $diffinfo{'from_id'} = $hash_parent;
4808                 $diffinfo{'to_id'}   = $hash;
4809                 if (defined $file_name) {
4810                         if (defined $file_parent) {
4811                                 $diffinfo{'status'} = '2';
4812                                 $diffinfo{'from_file'} = $file_parent;
4813                                 $diffinfo{'to_file'}   = $file_name;
4814                         } else { # assume not renamed
4815                                 $diffinfo{'status'} = '1';
4816                                 $diffinfo{'from_file'} = $file_name;
4817                                 $diffinfo{'to_file'}   = $file_name;
4818                         }
4819                 } else { # no filename given
4820                         $diffinfo{'status'} = '2';
4821                         $diffinfo{'from_file'} = $hash_parent;
4822                         $diffinfo{'to_file'}   = $hash;
4823                 }
4824
4825                 # non-textual hash id's can be cached
4826                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4827                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4828                         $expires = '+1d';
4829                 }
4830
4831                 # open patch output
4832                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4833                         '-p', ($format eq 'html' ? "--full-index" : ()),
4834                         $hash_parent, $hash, "--"
4835                         or die_error(undef, "Open git-diff failed");
4836         } else  {
4837                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4838                         unless %diffinfo;
4839         }
4840
4841         # header
4842         if ($format eq 'html') {
4843                 my $formats_nav =
4844                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4845                                 "raw");
4846                 git_header_html(undef, $expires);
4847                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4848                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4849                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4850                 } else {
4851                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4852                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4853                 }
4854                 if (defined $file_name) {
4855                         git_print_page_path($file_name, "blob", $hash_base);
4856                 } else {
4857                         print "<div class=\"page_path\"></div>\n";
4858                 }
4859
4860         } elsif ($format eq 'plain') {
4861                 print $cgi->header(
4862                         -type => 'text/plain',
4863                         -charset => 'utf-8',
4864                         -expires => $expires,
4865                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4866
4867                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4868
4869         } else {
4870                 die_error(undef, "Unknown blobdiff format");
4871         }
4872
4873         # patch
4874         if ($format eq 'html') {
4875                 print "<div class=\"page_body\">\n";
4876
4877                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4878                 close $fd;
4879
4880                 print "</div>\n"; # class="page_body"
4881                 git_footer_html();
4882
4883         } else {
4884                 while (my $line = <$fd>) {
4885                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4886                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4887
4888                         print $line;
4889
4890                         last if $line =~ m!^\+\+\+!;
4891                 }
4892                 local $/ = undef;
4893                 print <$fd>;
4894                 close $fd;
4895         }
4896 }
4897
4898 sub git_blobdiff_plain {
4899         git_blobdiff('plain');
4900 }
4901
4902 sub git_commitdiff {
4903         my $format = shift || 'html';
4904         $hash ||= $hash_base || "HEAD";
4905         my %co = parse_commit($hash);
4906         if (!%co) {
4907                 die_error(undef, "Unknown commit object");
4908         }
4909
4910         # choose format for commitdiff for merge
4911         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4912                 $hash_parent = '--cc';
4913         }
4914         # we need to prepare $formats_nav before almost any parameter munging
4915         my $formats_nav;
4916         if ($format eq 'html') {
4917                 $formats_nav =
4918                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4919                                 "raw");
4920
4921                 if (defined $hash_parent &&
4922                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4923                         # commitdiff with two commits given
4924                         my $hash_parent_short = $hash_parent;
4925                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4926                                 $hash_parent_short = substr($hash_parent, 0, 7);
4927                         }
4928                         $formats_nav .=
4929                                 ' (from';
4930                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4931                                 if ($co{'parents'}[$i] eq $hash_parent) {
4932                                         $formats_nav .= ' parent ' . ($i+1);
4933                                         last;
4934                                 }
4935                         }
4936                         $formats_nav .= ': ' .
4937                                 $cgi->a({-href => href(action=>"commitdiff",
4938                                                        hash=>$hash_parent)},
4939                                         esc_html($hash_parent_short)) .
4940                                 ')';
4941                 } elsif (!$co{'parent'}) {
4942                         # --root commitdiff
4943                         $formats_nav .= ' (initial)';
4944                 } elsif (scalar @{$co{'parents'}} == 1) {
4945                         # single parent commit
4946                         $formats_nav .=
4947                                 ' (parent: ' .
4948                                 $cgi->a({-href => href(action=>"commitdiff",
4949                                                        hash=>$co{'parent'})},
4950                                         esc_html(substr($co{'parent'}, 0, 7))) .
4951                                 ')';
4952                 } else {
4953                         # merge commit
4954                         if ($hash_parent eq '--cc') {
4955                                 $formats_nav .= ' | ' .
4956                                         $cgi->a({-href => href(action=>"commitdiff",
4957                                                                hash=>$hash, hash_parent=>'-c')},
4958                                                 'combined');
4959                         } else { # $hash_parent eq '-c'
4960                                 $formats_nav .= ' | ' .
4961                                         $cgi->a({-href => href(action=>"commitdiff",
4962                                                                hash=>$hash, hash_parent=>'--cc')},
4963                                                 'compact');
4964                         }
4965                         $formats_nav .=
4966                                 ' (merge: ' .
4967                                 join(' ', map {
4968                                         $cgi->a({-href => href(action=>"commitdiff",
4969                                                                hash=>$_)},
4970                                                 esc_html(substr($_, 0, 7)));
4971                                 } @{$co{'parents'}} ) .
4972                                 ')';
4973                 }
4974         }
4975
4976         my $hash_parent_param = $hash_parent;
4977         if (!defined $hash_parent_param) {
4978                 # --cc for multiple parents, --root for parentless
4979                 $hash_parent_param =
4980                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4981         }
4982
4983         # read commitdiff
4984         my $fd;
4985         my @difftree;
4986         if ($format eq 'html') {
4987                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4988                         "--no-commit-id", "--patch-with-raw", "--full-index",
4989                         $hash_parent_param, $hash, "--"
4990                         or die_error(undef, "Open git-diff-tree failed");
4991
4992                 while (my $line = <$fd>) {
4993                         chomp $line;
4994                         # empty line ends raw part of diff-tree output
4995                         last unless $line;
4996                         push @difftree, scalar parse_difftree_raw_line($line);
4997                 }
4998
4999         } elsif ($format eq 'plain') {
5000                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5001                         '-p', $hash_parent_param, $hash, "--"
5002                         or die_error(undef, "Open git-diff-tree failed");
5003
5004         } else {
5005                 die_error(undef, "Unknown commitdiff format");
5006         }
5007
5008         # non-textual hash id's can be cached
5009         my $expires;
5010         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5011                 $expires = "+1d";
5012         }
5013
5014         # write commit message
5015         if ($format eq 'html') {
5016                 my $refs = git_get_references();
5017                 my $ref = format_ref_marker($refs, $co{'id'});
5018
5019                 git_header_html(undef, $expires);
5020                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5021                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5022                 git_print_authorship(\%co);
5023                 print "<div class=\"page_body\">\n";
5024                 if (@{$co{'comment'}} > 1) {
5025                         print "<div class=\"log\">\n";
5026                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5027                         print "</div>\n"; # class="log"
5028                 }
5029
5030         } elsif ($format eq 'plain') {
5031                 my $refs = git_get_references("tags");
5032                 my $tagname = git_get_rev_name_tags($hash);
5033                 my $filename = basename($project) . "-$hash.patch";
5034
5035                 print $cgi->header(
5036                         -type => 'text/plain',
5037                         -charset => 'utf-8',
5038                         -expires => $expires,
5039                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5040                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5041                 print <<TEXT;
5042 From: $co{'author'}
5043 Date: $ad{'rfc2822'} ($ad{'tz_local'})
5044 Subject: $co{'title'}
5045 TEXT
5046                 print "X-Git-Tag: $tagname\n" if $tagname;
5047                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5048
5049                 foreach my $line (@{$co{'comment'}}) {
5050                         print "$line\n";
5051                 }
5052                 print "---\n\n";
5053         }
5054
5055         # write patch
5056         if ($format eq 'html') {
5057                 my $use_parents = !defined $hash_parent ||
5058                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5059                 git_difftree_body(\@difftree, $hash,
5060                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5061                 print "<br/>\n";
5062
5063                 git_patchset_body($fd, \@difftree, $hash,
5064                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5065                 close $fd;
5066                 print "</div>\n"; # class="page_body"
5067                 git_footer_html();
5068
5069         } elsif ($format eq 'plain') {
5070                 local $/ = undef;
5071                 print <$fd>;
5072                 close $fd
5073                         or print "Reading git-diff-tree failed\n";
5074         }
5075 }
5076
5077 sub git_commitdiff_plain {
5078         git_commitdiff('plain');
5079 }
5080
5081 sub git_history {
5082         if (!defined $hash_base) {
5083                 $hash_base = git_get_head_hash($project);
5084         }
5085         if (!defined $page) {
5086                 $page = 0;
5087         }
5088         my $ftype;
5089         my %co = parse_commit($hash_base);
5090         if (!%co) {
5091                 die_error(undef, "Unknown commit object");
5092         }
5093
5094         my $refs = git_get_references();
5095         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5096
5097         if (!defined $hash && defined $file_name) {
5098                 $hash = git_get_hash_by_path($hash_base, $file_name);
5099         }
5100         if (defined $hash) {
5101                 $ftype = git_get_type($hash);
5102         }
5103
5104         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5105
5106         my $paging_nav = '';
5107         if ($page > 0) {
5108                 $paging_nav .=
5109                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5110                                                file_name=>$file_name)},
5111                                 "first");
5112                 $paging_nav .= " &sdot; " .
5113                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5114                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5115         } else {
5116                 $paging_nav .= "first";
5117                 $paging_nav .= " &sdot; prev";
5118         }
5119         my $next_link = '';
5120         if ($#commitlist >= 100) {
5121                 $next_link =
5122                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5123                                  -accesskey => "n", -title => "Alt-n"}, "next");
5124                 $paging_nav .= " &sdot; $next_link";
5125         } else {
5126                 $paging_nav .= " &sdot; next";
5127         }
5128
5129         git_header_html();
5130         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5131         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5132         git_print_page_path($file_name, $ftype, $hash_base);
5133
5134         git_history_body(\@commitlist, 0, 99,
5135                          $refs, $hash_base, $ftype, $next_link);
5136
5137         git_footer_html();
5138 }
5139
5140 sub git_search {
5141         my ($have_search) = gitweb_check_feature('search');
5142         if (!$have_search) {
5143                 die_error('403 Permission denied', "Permission denied");
5144         }
5145         if (!defined $searchtext) {
5146                 die_error(undef, "Text field empty");
5147         }
5148         if (!defined $hash) {
5149                 $hash = git_get_head_hash($project);
5150         }
5151         my %co = parse_commit($hash);
5152         if (!%co) {
5153                 die_error(undef, "Unknown commit object");
5154         }
5155         if (!defined $page) {
5156                 $page = 0;
5157         }
5158
5159         $searchtype ||= 'commit';
5160         if ($searchtype eq 'pickaxe') {
5161                 # pickaxe may take all resources of your box and run for several minutes
5162                 # with every query - so decide by yourself how public you make this feature
5163                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5164                 if (!$have_pickaxe) {
5165                         die_error('403 Permission denied', "Permission denied");
5166                 }
5167         }
5168         if ($searchtype eq 'grep') {
5169                 my ($have_grep) = gitweb_check_feature('grep');
5170                 if (!$have_grep) {
5171                         die_error('403 Permission denied', "Permission denied");
5172                 }
5173         }
5174
5175         git_header_html();
5176
5177         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5178                 my $greptype;
5179                 if ($searchtype eq 'commit') {
5180                         $greptype = "--grep=";
5181                 } elsif ($searchtype eq 'author') {
5182                         $greptype = "--author=";
5183                 } elsif ($searchtype eq 'committer') {
5184                         $greptype = "--committer=";
5185                 }
5186                 $greptype .= $search_regexp;
5187                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5188
5189                 my $paging_nav = '';
5190                 if ($page > 0) {
5191                         $paging_nav .=
5192                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5193                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5194                                         "first");
5195                         $paging_nav .= " &sdot; " .
5196                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5197                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5198                 } else {
5199                         $paging_nav .= "first";
5200                         $paging_nav .= " &sdot; prev";
5201                 }
5202                 my $next_link = '';
5203                 if ($#commitlist >= 100) {
5204                         $next_link =
5205                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5206                                          -accesskey => "n", -title => "Alt-n"}, "next");
5207                         $paging_nav .= " &sdot; $next_link";
5208                 } else {
5209                         $paging_nav .= " &sdot; next";
5210                 }
5211
5212                 if ($#commitlist >= 100) {
5213                 }
5214
5215                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5216                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5217                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5218         }
5219
5220         if ($searchtype eq 'pickaxe') {
5221                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5222                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5223
5224                 print "<table cellspacing=\"0\">\n";
5225                 my $alternate = 1;
5226                 $/ = "\n";
5227                 my $git_command = git_cmd_str();
5228                 my $searchqtext = $searchtext;
5229                 $searchqtext =~ s/'/'\\''/;
5230                 open my $fd, "-|", "$git_command rev-list $hash | " .
5231                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5232                 undef %co;
5233                 my @files;
5234                 while (my $line = <$fd>) {
5235                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5236                                 my %set;
5237                                 $set{'file'} = $6;
5238                                 $set{'from_id'} = $3;
5239                                 $set{'to_id'} = $4;
5240                                 $set{'id'} = $set{'to_id'};
5241                                 if ($set{'id'} =~ m/0{40}/) {
5242                                         $set{'id'} = $set{'from_id'};
5243                                 }
5244                                 if ($set{'id'} =~ m/0{40}/) {
5245                                         next;
5246                                 }
5247                                 push @files, \%set;
5248                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5249                                 if (%co) {
5250                                         if ($alternate) {
5251                                                 print "<tr class=\"dark\">\n";
5252                                         } else {
5253                                                 print "<tr class=\"light\">\n";
5254                                         }
5255                                         $alternate ^= 1;
5256                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5257                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5258                                               "<td><i>" . $author . "</i></td>\n" .
5259                                               "<td>" .
5260                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5261                                                       -class => "list subject"},
5262                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5263                                         while (my $setref = shift @files) {
5264                                                 my %set = %$setref;
5265                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5266                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5267                                                               -class => "list"},
5268                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5269                                                       "<br/>\n";
5270                                         }
5271                                         print "</td>\n" .
5272                                               "<td class=\"link\">" .
5273                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5274                                               " | " .
5275                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5276                                         print "</td>\n" .
5277                                               "</tr>\n";
5278                                 }
5279                                 %co = parse_commit($1);
5280                         }
5281                 }
5282                 close $fd;
5283
5284                 print "</table>\n";
5285         }
5286
5287         if ($searchtype eq 'grep') {
5288                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5289                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5290
5291                 print "<table cellspacing=\"0\">\n";
5292                 my $alternate = 1;
5293                 my $matches = 0;
5294                 $/ = "\n";
5295                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5296                 my $lastfile = '';
5297                 while (my $line = <$fd>) {
5298                         chomp $line;
5299                         my ($file, $lno, $ltext, $binary);
5300                         last if ($matches++ > 1000);
5301                         if ($line =~ /^Binary file (.+) matches$/) {
5302                                 $file = $1;
5303                                 $binary = 1;
5304                         } else {
5305                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5306                         }
5307                         if ($file ne $lastfile) {
5308                                 $lastfile and print "</td></tr>\n";
5309                                 if ($alternate++) {
5310                                         print "<tr class=\"dark\">\n";
5311                                 } else {
5312                                         print "<tr class=\"light\">\n";
5313                                 }
5314                                 print "<td class=\"list\">".
5315                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5316                                                                file_name=>"$file"),
5317                                                 -class => "list"}, esc_path($file));
5318                                 print "</td><td>\n";
5319                                 $lastfile = $file;
5320                         }
5321                         if ($binary) {
5322                                 print "<div class=\"binary\">Binary file</div>\n";
5323                         } else {
5324                                 $ltext = untabify($ltext);
5325                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5326                                         $ltext = esc_html($1, -nbsp=>1);
5327                                         $ltext .= '<span class="match">';
5328                                         $ltext .= esc_html($2, -nbsp=>1);
5329                                         $ltext .= '</span>';
5330                                         $ltext .= esc_html($3, -nbsp=>1);
5331                                 } else {
5332                                         $ltext = esc_html($ltext, -nbsp=>1);
5333                                 }
5334                                 print "<div class=\"pre\">" .
5335                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5336                                                                file_name=>"$file").'#l'.$lno,
5337                                                 -class => "linenr"}, sprintf('%4i', $lno))
5338                                         . ' ' .  $ltext . "</div>\n";
5339                         }
5340                 }
5341                 if ($lastfile) {
5342                         print "</td></tr>\n";
5343                         if ($matches > 1000) {
5344                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5345                         }
5346                 } else {
5347                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5348                 }
5349                 close $fd;
5350
5351                 print "</table>\n";
5352         }
5353         git_footer_html();
5354 }
5355
5356 sub git_search_help {
5357         git_header_html();
5358         git_print_page_nav('','', $hash,$hash,$hash);
5359         print <<EOT;
5360 <dl>
5361 <dt><b>commit</b></dt>
5362 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5363 EOT
5364         my ($have_grep) = gitweb_check_feature('grep');
5365         if ($have_grep) {
5366                 print <<EOT;
5367 <dt><b>grep</b></dt>
5368 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5369     a different one) are searched for the given
5370 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5371 (POSIX extended) and the matches are listed. On large
5372 trees, this search can take a while and put some strain on the server, so please use it with
5373 some consideration.</dd>
5374 EOT
5375         }
5376         print <<EOT;
5377 <dt><b>author</b></dt>
5378 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5379 <dt><b>committer</b></dt>
5380 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5381 EOT
5382         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5383         if ($have_pickaxe) {
5384                 print <<EOT;
5385 <dt><b>pickaxe</b></dt>
5386 <dd>All commits that caused the string to appear or disappear from any file (changes that
5387 added, removed or "modified" the string) will be listed. This search can take a while and
5388 takes a lot of strain on the server, so please use it wisely.</dd>
5389 EOT
5390         }
5391         print "</dl>\n";
5392         git_footer_html();
5393 }
5394
5395 sub git_shortlog {
5396         my $head = git_get_head_hash($project);
5397         if (!defined $hash) {
5398                 $hash = $head;
5399         }
5400         if (!defined $page) {
5401                 $page = 0;
5402         }
5403         my $refs = git_get_references();
5404
5405         my @commitlist = parse_commits($hash, 101, (100 * $page));
5406
5407         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5408         my $next_link = '';
5409         if ($#commitlist >= 100) {
5410                 $next_link =
5411                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5412                                  -accesskey => "n", -title => "Alt-n"}, "next");
5413         }
5414
5415         git_header_html();
5416         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5417         git_print_header_div('summary', $project);
5418
5419         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5420
5421         git_footer_html();
5422 }
5423
5424 ## ......................................................................
5425 ## feeds (RSS, Atom; OPML)
5426
5427 sub git_feed {
5428         my $format = shift || 'atom';
5429         my ($have_blame) = gitweb_check_feature('blame');
5430
5431         # Atom: http://www.atomenabled.org/developers/syndication/
5432         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5433         if ($format ne 'rss' && $format ne 'atom') {
5434                 die_error(undef, "Unknown web feed format");
5435         }
5436
5437         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5438         my $head = $hash || 'HEAD';
5439         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5440
5441         my %latest_commit;
5442         my %latest_date;
5443         my $content_type = "application/$format+xml";
5444         if (defined $cgi->http('HTTP_ACCEPT') &&
5445                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5446                 # browser (feed reader) prefers text/xml
5447                 $content_type = 'text/xml';
5448         }
5449         if (defined($commitlist[0])) {
5450                 %latest_commit = %{$commitlist[0]};
5451                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5452                 print $cgi->header(
5453                         -type => $content_type,
5454                         -charset => 'utf-8',
5455                         -last_modified => $latest_date{'rfc2822'});
5456         } else {
5457                 print $cgi->header(
5458                         -type => $content_type,
5459                         -charset => 'utf-8');
5460         }
5461
5462         # Optimization: skip generating the body if client asks only
5463         # for Last-Modified date.
5464         return if ($cgi->request_method() eq 'HEAD');
5465
5466         # header variables
5467         my $title = "$site_name - $project/$action";
5468         my $feed_type = 'log';
5469         if (defined $hash) {
5470                 $title .= " - '$hash'";
5471                 $feed_type = 'branch log';
5472                 if (defined $file_name) {
5473                         $title .= " :: $file_name";
5474                         $feed_type = 'history';
5475                 }
5476         } elsif (defined $file_name) {
5477                 $title .= " - $file_name";
5478                 $feed_type = 'history';
5479         }
5480         $title .= " $feed_type";
5481         my $descr = git_get_project_description($project);
5482         if (defined $descr) {
5483                 $descr = esc_html($descr);
5484         } else {
5485                 $descr = "$project " .
5486                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5487                          " feed";
5488         }
5489         my $owner = git_get_project_owner($project);
5490         $owner = esc_html($owner);
5491
5492         #header
5493         my $alt_url;
5494         if (defined $file_name) {
5495                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5496         } elsif (defined $hash) {
5497                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5498         } else {
5499                 $alt_url = href(-full=>1, action=>"summary");
5500         }
5501         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5502         if ($format eq 'rss') {
5503                 print <<XML;
5504 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5505 <channel>
5506 XML
5507                 print "<title>$title</title>\n" .
5508                       "<link>$alt_url</link>\n" .
5509                       "<description>$descr</description>\n" .
5510                       "<language>en</language>\n";
5511         } elsif ($format eq 'atom') {
5512                 print <<XML;
5513 <feed xmlns="http://www.w3.org/2005/Atom">
5514 XML
5515                 print "<title>$title</title>\n" .
5516                       "<subtitle>$descr</subtitle>\n" .
5517                       '<link rel="alternate" type="text/html" href="' .
5518                       $alt_url . '" />' . "\n" .
5519                       '<link rel="self" type="' . $content_type . '" href="' .
5520                       $cgi->self_url() . '" />' . "\n" .
5521                       "<id>" . href(-full=>1) . "</id>\n" .
5522                       # use project owner for feed author
5523                       "<author><name>$owner</name></author>\n";
5524                 if (defined $favicon) {
5525                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5526                 }
5527                 if (defined $logo_url) {
5528                         # not twice as wide as tall: 72 x 27 pixels
5529                         print "<logo>" . esc_url($logo) . "</logo>\n";
5530                 }
5531                 if (! %latest_date) {
5532                         # dummy date to keep the feed valid until commits trickle in:
5533                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5534                 } else {
5535                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5536                 }
5537         }
5538
5539         # contents
5540         for (my $i = 0; $i <= $#commitlist; $i++) {
5541                 my %co = %{$commitlist[$i]};
5542                 my $commit = $co{'id'};
5543                 # we read 150, we always show 30 and the ones more recent than 48 hours
5544                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5545                         last;
5546                 }
5547                 my %cd = parse_date($co{'author_epoch'});
5548
5549                 # get list of changed files
5550                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5551                         $co{'parent'} || "--root",
5552                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5553                         or next;
5554                 my @difftree = map { chomp; $_ } <$fd>;
5555                 close $fd
5556                         or next;
5557
5558                 # print element (entry, item)
5559                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5560                 if ($format eq 'rss') {
5561                         print "<item>\n" .
5562                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5563                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5564                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5565                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5566                               "<link>$co_url</link>\n" .
5567                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5568                               "<content:encoded>" .
5569                               "<![CDATA[\n";
5570                 } elsif ($format eq 'atom') {
5571                         print "<entry>\n" .
5572                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5573                               "<updated>$cd{'iso-8601'}</updated>\n" .
5574                               "<author>\n" .
5575                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5576                         if ($co{'author_email'}) {
5577                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5578                         }
5579                         print "</author>\n" .
5580                               # use committer for contributor
5581                               "<contributor>\n" .
5582                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5583                         if ($co{'committer_email'}) {
5584                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5585                         }
5586                         print "</contributor>\n" .
5587                               "<published>$cd{'iso-8601'}</published>\n" .
5588                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5589                               "<id>$co_url</id>\n" .
5590                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5591                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5592                 }
5593                 my $comment = $co{'comment'};
5594                 print "<pre>\n";
5595                 foreach my $line (@$comment) {
5596                         $line = esc_html($line);
5597                         print "$line\n";
5598                 }
5599                 print "</pre><ul>\n";
5600                 foreach my $difftree_line (@difftree) {
5601                         my %difftree = parse_difftree_raw_line($difftree_line);
5602                         next if !$difftree{'from_id'};
5603
5604                         my $file = $difftree{'file'} || $difftree{'to_file'};
5605
5606                         print "<li>" .
5607                               "[" .
5608                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5609                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5610                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5611                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5612                                       -title => "diff"}, 'D');
5613                         if ($have_blame) {
5614                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5615                                                              file_name=>$file, hash_base=>$commit),
5616                                               -title => "blame"}, 'B');
5617                         }
5618                         # if this is not a feed of a file history
5619                         if (!defined $file_name || $file_name ne $file) {
5620                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5621                                                              file_name=>$file, hash=>$commit),
5622                                               -title => "history"}, 'H');
5623                         }
5624                         $file = esc_path($file);
5625                         print "] ".
5626                               "$file</li>\n";
5627                 }
5628                 if ($format eq 'rss') {
5629                         print "</ul>]]>\n" .
5630                               "</content:encoded>\n" .
5631                               "</item>\n";
5632                 } elsif ($format eq 'atom') {
5633                         print "</ul>\n</div>\n" .
5634                               "</content>\n" .
5635                               "</entry>\n";
5636                 }
5637         }
5638
5639         # end of feed
5640         if ($format eq 'rss') {
5641                 print "</channel>\n</rss>\n";
5642         }       elsif ($format eq 'atom') {
5643                 print "</feed>\n";
5644         }
5645 }
5646
5647 sub git_rss {
5648         git_feed('rss');
5649 }
5650
5651 sub git_atom {
5652         git_feed('atom');
5653 }
5654
5655 sub git_opml {
5656         my @list = git_get_projects_list();
5657
5658         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5659         print <<XML;
5660 <?xml version="1.0" encoding="utf-8"?>
5661 <opml version="1.0">
5662 <head>
5663   <title>$site_name OPML Export</title>
5664 </head>
5665 <body>
5666 <outline text="git RSS feeds">
5667 XML
5668
5669         foreach my $pr (@list) {
5670                 my %proj = %$pr;
5671                 my $head = git_get_head_hash($proj{'path'});
5672                 if (!defined $head) {
5673                         next;
5674                 }
5675                 $git_dir = "$projectroot/$proj{'path'}";
5676                 my %co = parse_commit($head);
5677                 if (!%co) {
5678                         next;
5679                 }
5680
5681                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5682                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5683                 my $html = "$my_url?p=$proj{'path'};a=summary";
5684                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5685         }
5686         print <<XML;
5687 </outline>
5688 </body>
5689 </opml>
5690 XML
5691 }