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 # target of the home link on top of all pages
  39 our $home_link = $my_uri || "/";
  40
  41 # string of the home link on top of all pages
  42 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  43
  44 # name of your site or organization to appear in page titles
  45 # replace this with something more descriptive for clearer bookmarks
  46 our $site_name = "++GITWEB_SITENAME++"
  47                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  48
  49 # filename of html text to include at top of each page
  50 our $site_header = "++GITWEB_SITE_HEADER++";
  51 # html text to include at home page
  52 our $home_text = "++GITWEB_HOMETEXT++";
  53 # filename of html text to include at bottom of each page
  54 our $site_footer = "++GITWEB_SITE_FOOTER++";
  55
  56 # URI of stylesheets
  57 our @stylesheets = ("++GITWEB_CSS++");
  58 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  59 our $stylesheet = undef;
  60
  61 # URI of GIT logo (72x27 size)
  62 our $logo = "++GITWEB_LOGO++";
  63 # URI of GIT favicon, assumed to be image/png type
  64 our $favicon = "++GITWEB_FAVICON++";
  65
  66 # URI and label (title) of GIT logo link
  67 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  68 #our $logo_label = "git documentation";
  69 our $logo_url = "http://git.or.cz/";
  70 our $logo_label = "git homepage";
  71
  72 # source of projects list
  73 our $projects_list = "++GITWEB_LIST++";
  74
  75 # the width (in characters) of the projects list "Description" column
  76 our $projects_list_description_width = 25;
  77
  78 # default order of projects list
  79 # valid values are none, project, descr, owner, and age
  80 our $default_projects_order = "project";
  81
  82 # show repository only if this file exists
  83 # (only effective if this variable evaluates to true)
  84 our $export_ok = "++GITWEB_EXPORT_OK++";
  85
  86 # only allow viewing of repositories also shown on the overview page
  87 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  88
  89 # list of git base URLs used for URL to where fetch project from,
  90 # i.e. full URL is "$git_base_url/$project"
  91 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  92
  93 # default blob_plain mimetype and default charset for text/plain blob
  94 our $default_blob_plain_mimetype = 'text/plain';
  95 our $default_text_plain_charset  = undef;
  96
  97 # file to use for guessing MIME types before trying /etc/mime.types
  98 # (relative to the current git repository)
  99 our $mimetypes_file = undef;
 100
 101 # assume this charset if line contains non-UTF-8 characters;
 102 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 103 # for which encoding all byte sequences are valid, for example
 104 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 105 # could be even 'utf-8' for the old behavior)
 106 our $fallback_encoding = 'latin1';
 107
 108 # rename detection options for git-diff and git-diff-tree
 109 # - default is '-M', with the cost proportional to
 110 #   (number of removed files) * (number of new files).
 111 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 112 #   (number of changed files + number of removed files) * (number of new files)
 113 # - even more costly is '-C', '--find-copies-harder' with cost
 114 #   (number of files in the original tree) * (number of new files)
 115 # - one might want to include '-B' option, e.g. '-B', '-M'
 116 our @diff_opts = ('-M'); # taken from git_commit
 117
 118 # information about snapshot formats that gitweb is capable of serving
 119 our %known_snapshot_formats = (
 120         # name => {
 121         #       'display' => display name,
 122         #       'type' => mime type,
 123         #       'suffix' => filename suffix,
 124         #       'format' => --format for git-archive,
 125         #       'compressor' => [compressor command and arguments]
 126         #                       (array reference, optional)}
 127         #
 128         'tgz' => {
 129                 'display' => 'tar.gz',
 130                 'type' => 'application/x-gzip',
 131                 'suffix' => '.tar.gz',
 132                 'format' => 'tar',
 133                 'compressor' => ['gzip']},
 134
 135         'tbz2' => {
 136                 'display' => 'tar.bz2',
 137                 'type' => 'application/x-bzip2',
 138                 'suffix' => '.tar.bz2',
 139                 'format' => 'tar',
 140                 'compressor' => ['bzip2']},
 141
 142         'zip' => {
 143                 'display' => 'zip',
 144                 'type' => 'application/x-zip',
 145                 'suffix' => '.zip',
 146                 'format' => 'zip'},
 147 );
 148
 149 # Aliases so we understand old gitweb.snapshot values in repository
 150 # configuration.
 151 our %known_snapshot_format_aliases = (
 152         'gzip'  => 'tgz',
 153         'bzip2' => 'tbz2',
 154
 155         # backward compatibility: legacy gitweb config support
 156         'x-gzip' => undef, 'gz' => undef,
 157         'x-bzip2' => undef, 'bz2' => undef,
 158         'x-zip' => undef, '' => undef,
 159 );
 160
 161 # You define site-wide feature defaults here; override them with
 162 # $GITWEB_CONFIG as necessary.
 163 our %feature = (
 164         # feature => {
 165         #       'sub' => feature-sub (subroutine),
 166         #       'override' => allow-override (boolean),
 167         #       'default' => [ default options...] (array reference)}
 168         #
 169         # if feature is overridable (it means that allow-override has true value),
 170         # then feature-sub will be called with default options as parameters;
 171         # return value of feature-sub indicates if to enable specified feature
 172         #
 173         # if there is no 'sub' key (no feature-sub), then feature cannot be
 174         # overriden
 175         #
 176         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 177
 178         # Enable the 'blame' blob view, showing the last commit that modified
 179         # each line in the file. This can be very CPU-intensive.
 180
 181         # To enable system wide have in $GITWEB_CONFIG
 182         # $feature{'blame'}{'default'} = [1];
 183         # To have project specific config enable override in $GITWEB_CONFIG
 184         # $feature{'blame'}{'override'} = 1;
 185         # and in project config gitweb.blame = 0|1;
 186         'blame' => {
 187                 'sub' => \&feature_blame,
 188                 'override' => 0,
 189                 'default' => [0]},
 190
 191         # Enable the 'snapshot' link, providing a compressed archive of any
 192         # tree. This can potentially generate high traffic if you have large
 193         # project.
 194
 195         # Value is a list of formats defined in %known_snapshot_formats that
 196         # you wish to offer.
 197         # To disable system wide have in $GITWEB_CONFIG
 198         # $feature{'snapshot'}{'default'} = [];
 199         # To have project specific config enable override in $GITWEB_CONFIG
 200         # $feature{'snapshot'}{'override'} = 1;
 201         # and in project config, a comma-separated list of formats or "none"
 202         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 203         'snapshot' => {
 204                 'sub' => \&feature_snapshot,
 205                 'override' => 0,
 206                 'default' => ['tgz']},
 207
 208         # Enable text search, which will list the commits which match author,
 209         # committer or commit text to a given string.  Enabled by default.
 210         # Project specific override is not supported.
 211         'search' => {
 212                 'override' => 0,
 213                 'default' => [1]},
 214
 215         # Enable grep search, which will list the files in currently selected
 216         # tree containing the given string. Enabled by default. This can be
 217         # potentially CPU-intensive, of course.
 218
 219         # To enable system wide have in $GITWEB_CONFIG
 220         # $feature{'grep'}{'default'} = [1];
 221         # To have project specific config enable override in $GITWEB_CONFIG
 222         # $feature{'grep'}{'override'} = 1;
 223         # and in project config gitweb.grep = 0|1;
 224         'grep' => {
 225                 'override' => 0,
 226                 'default' => [1]},
 227
 228         # Enable the pickaxe search, which will list the commits that modified
 229         # a given string in a file. This can be practical and quite faster
 230         # alternative to 'blame', but still potentially CPU-intensive.
 231
 232         # To enable system wide have in $GITWEB_CONFIG
 233         # $feature{'pickaxe'}{'default'} = [1];
 234         # To have project specific config enable override in $GITWEB_CONFIG
 235         # $feature{'pickaxe'}{'override'} = 1;
 236         # and in project config gitweb.pickaxe = 0|1;
 237         'pickaxe' => {
 238                 'sub' => \&feature_pickaxe,
 239                 'override' => 0,
 240                 'default' => [1]},
 241
 242         # Make gitweb use an alternative format of the URLs which can be
 243         # more readable and natural-looking: project name is embedded
 244         # directly in the path and the query string contains other
 245         # auxiliary information. All gitweb installations recognize
 246         # URL in either format; this configures in which formats gitweb
 247         # generates links.
 248
 249         # To enable system wide have in $GITWEB_CONFIG
 250         # $feature{'pathinfo'}{'default'} = [1];
 251         # Project specific override is not supported.
 252
 253         # Note that you will need to change the default location of CSS,
 254         # favicon, logo and possibly other files to an absolute URL. Also,
 255         # if gitweb.cgi serves as your indexfile, you will need to force
 256         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 257         'pathinfo' => {
 258                 'override' => 0,
 259                 'default' => [0]},
 260
 261         # Make gitweb consider projects in project root subdirectories
 262         # to be forks of existing projects. Given project $projname.git,
 263         # projects matching $projname/*.git will not be shown in the main
 264         # projects list, instead a '+' mark will be added to $projname
 265         # there and a 'forks' view will be enabled for the project, listing
 266         # all the forks. If project list is taken from a file, forks have
 267         # to be listed after the main project.
 268
 269         # To enable system wide have in $GITWEB_CONFIG
 270         # $feature{'forks'}{'default'} = [1];
 271         # Project specific override is not supported.
 272         'forks' => {
 273                 'override' => 0,
 274                 'default' => [0]},
 275 );
 276
 277 sub gitweb_check_feature {
 278         my ($name) = @_;
 279         return unless exists $feature{$name};
 280         my ($sub, $override, @defaults) = (
 281                 $feature{$name}{'sub'},
 282                 $feature{$name}{'override'},
 283                 @{$feature{$name}{'default'}});
 284         if (!$override) { return @defaults; }
 285         if (!defined $sub) {
 286                 warn "feature $name is not overrideable";
 287                 return @defaults;
 288         }
 289         return $sub->(@defaults);
 290 }
 291
 292 sub feature_blame {
 293         my ($val) = git_get_project_config('blame', '--bool');
 294
 295         if ($val eq 'true') {
 296                 return 1;
 297         } elsif ($val eq 'false') {
 298                 return 0;
 299         }
 300
 301         return $_[0];
 302 }
 303
 304 sub feature_snapshot {
 305         my (@fmts) = @_;
 306
 307         my ($val) = git_get_project_config('snapshot');
 308
 309         if ($val) {
 310                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 311         }
 312
 313         return @fmts;
 314 }
 315
 316 sub feature_grep {
 317         my ($val) = git_get_project_config('grep', '--bool');
 318
 319         if ($val eq 'true') {
 320                 return (1);
 321         } elsif ($val eq 'false') {
 322                 return (0);
 323         }
 324
 325         return ($_[0]);
 326 }
 327
 328 sub feature_pickaxe {
 329         my ($val) = git_get_project_config('pickaxe', '--bool');
 330
 331         if ($val eq 'true') {
 332                 return (1);
 333         } elsif ($val eq 'false') {
 334                 return (0);
 335         }
 336
 337         return ($_[0]);
 338 }
 339
 340 # checking HEAD file with -e is fragile if the repository was
 341 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 342 # and then pruned.
 343 sub check_head_link {
 344         my ($dir) = @_;
 345         my $headfile = "$dir/HEAD";
 346         return ((-e $headfile) ||
 347                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 348 }
 349
 350 sub check_export_ok {
 351         my ($dir) = @_;
 352         return (check_head_link($dir) &&
 353                 (!$export_ok || -e "$dir/$export_ok"));
 354 }
 355
 356 # process alternate names for backward compatibility
 357 # filter out unsupported (unknown) snapshot formats
 358 sub filter_snapshot_fmts {
 359         my @fmts = @_;
 360
 361         @fmts = map {
 362                 exists $known_snapshot_format_aliases{$_} ?
 363                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 364         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 365
 366 }
 367
 368 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 369 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 370
 371 # version of the core git binary
 372 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 373
 374 $projects_list ||= $projectroot;
 375
 376 # ======================================================================
 377 # input validation and dispatch
 378 our $action = $cgi->param('a');
 379 if (defined $action) {
 380         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 381                 die_error(undef, "Invalid action parameter");
 382         }
 383 }
 384
 385 # parameters which are pathnames
 386 our $project = $cgi->param('p');
 387 if (defined $project) {
 388         if (!validate_pathname($project) ||
 389             !(-d "$projectroot/$project") ||
 390             !check_head_link("$projectroot/$project") ||
 391             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 392             ($strict_export && !project_in_list($project))) {
 393                 undef $project;
 394                 die_error(undef, "No such project");
 395         }
 396 }
 397
 398 our $file_name = $cgi->param('f');
 399 if (defined $file_name) {
 400         if (!validate_pathname($file_name)) {
 401                 die_error(undef, "Invalid file parameter");
 402         }
 403 }
 404
 405 our $file_parent = $cgi->param('fp');
 406 if (defined $file_parent) {
 407         if (!validate_pathname($file_parent)) {
 408                 die_error(undef, "Invalid file parent parameter");
 409         }
 410 }
 411
 412 # parameters which are refnames
 413 our $hash = $cgi->param('h');
 414 if (defined $hash) {
 415         if (!validate_refname($hash)) {
 416                 die_error(undef, "Invalid hash parameter");
 417         }
 418 }
 419
 420 our $hash_parent = $cgi->param('hp');
 421 if (defined $hash_parent) {
 422         if (!validate_refname($hash_parent)) {
 423                 die_error(undef, "Invalid hash parent parameter");
 424         }
 425 }
 426
 427 our $hash_base = $cgi->param('hb');
 428 if (defined $hash_base) {
 429         if (!validate_refname($hash_base)) {
 430                 die_error(undef, "Invalid hash base parameter");
 431         }
 432 }
 433
 434 my %allowed_options = (
 435         "--no-merges" => [ qw(rss atom log shortlog history) ],
 436 );
 437
 438 our @extra_options = $cgi->param('opt');
 439 if (defined @extra_options) {
 440         foreach my $opt (@extra_options) {
 441                 if (not exists $allowed_options{$opt}) {
 442                         die_error(undef, "Invalid option parameter");
 443                 }
 444                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 445                         die_error(undef, "Invalid option parameter for this action");
 446                 }
 447         }
 448 }
 449
 450 our $hash_parent_base = $cgi->param('hpb');
 451 if (defined $hash_parent_base) {
 452         if (!validate_refname($hash_parent_base)) {
 453                 die_error(undef, "Invalid hash parent base parameter");
 454         }
 455 }
 456
 457 # other parameters
 458 our $page = $cgi->param('pg');
 459 if (defined $page) {
 460         if ($page =~ m/[^0-9]/) {
 461                 die_error(undef, "Invalid page parameter");
 462         }
 463 }
 464
 465 our $searchtype = $cgi->param('st');
 466 if (defined $searchtype) {
 467         if ($searchtype =~ m/[^a-z]/) {
 468                 die_error(undef, "Invalid searchtype parameter");
 469         }
 470 }
 471
 472 our $searchtext = $cgi->param('s');
 473 our $search_regexp;
 474 if (defined $searchtext) {
 475         if ($searchtype ne 'grep' and $searchtype ne 'pickaxe' and $searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 476                 die_error(undef, "Invalid search parameter");
 477         }
 478         if (length($searchtext) < 2) {
 479                 die_error(undef, "At least two characters are required for search parameter");
 480         }
 481         $search_regexp = quotemeta $searchtext;
 482 }
 483
 484 # now read PATH_INFO and use it as alternative to parameters
 485 sub evaluate_path_info {
 486         return if defined $project;
 487         my $path_info = $ENV{"PATH_INFO"};
 488         return if !$path_info;
 489         $path_info =~ s,^/+,,;
 490         return if !$path_info;
 491         # find which part of PATH_INFO is project
 492         $project = $path_info;
 493         $project =~ s,/+$,,;
 494         while ($project && !check_head_link("$projectroot/$project")) {
 495                 $project =~ s,/*[^/]*$,,;
 496         }
 497         # validate project
 498         $project = validate_pathname($project);
 499         if (!$project ||
 500             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 501             ($strict_export && !project_in_list($project))) {
 502                 undef $project;
 503                 return;
 504         }
 505         # do not change any parameters if an action is given using the query string
 506         return if $action;
 507         $path_info =~ s,^$project/*,,;
 508         my ($refname, $pathname) = split(/:/, $path_info, 2);
 509         if (defined $pathname) {
 510                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 511                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 512                 $pathname =~ s,^/+,,;
 513                 if (!$pathname || substr($pathname, -1) eq "/") {
 514                         $action  ||= "tree";
 515                         $pathname =~ s,/$,,;
 516                 } else {
 517                         $action  ||= "blob_plain";
 518                 }
 519                 $hash_base ||= validate_refname($refname);
 520                 $file_name ||= validate_pathname($pathname);
 521         } elsif (defined $refname) {
 522                 # we got "project.git/branch"
 523                 $action ||= "shortlog";
 524                 $hash   ||= validate_refname($refname);
 525         }
 526 }
 527 evaluate_path_info();
 528
 529 # path to the current git repository
 530 our $git_dir;
 531 $git_dir = "$projectroot/$project" if $project;
 532
 533 # dispatch
 534 my %actions = (
 535         "blame" => \&git_blame2,
 536         "blobdiff" => \&git_blobdiff,
 537         "blobdiff_plain" => \&git_blobdiff_plain,
 538         "blob" => \&git_blob,
 539         "blob_plain" => \&git_blob_plain,
 540         "commitdiff" => \&git_commitdiff,
 541         "commitdiff_plain" => \&git_commitdiff_plain,
 542         "commit" => \&git_commit,
 543         "forks" => \&git_forks,
 544         "heads" => \&git_heads,
 545         "history" => \&git_history,
 546         "log" => \&git_log,
 547         "rss" => \&git_rss,
 548         "atom" => \&git_atom,
 549         "search" => \&git_search,
 550         "search_help" => \&git_search_help,
 551         "shortlog" => \&git_shortlog,
 552         "summary" => \&git_summary,
 553         "tag" => \&git_tag,
 554         "tags" => \&git_tags,
 555         "tree" => \&git_tree,
 556         "snapshot" => \&git_snapshot,
 557         "object" => \&git_object,
 558         # those below don't need $project
 559         "opml" => \&git_opml,
 560         "project_list" => \&git_project_list,
 561         "project_index" => \&git_project_index,
 562 );
 563
 564 if (!defined $action) {
 565         if (defined $hash) {
 566                 $action = git_get_type($hash);
 567         } elsif (defined $hash_base && defined $file_name) {
 568                 $action = git_get_type("$hash_base:$file_name");
 569         } elsif (defined $project) {
 570                 $action = 'summary';
 571         } else {
 572                 $action = 'project_list';
 573         }
 574 }
 575 if (!defined($actions{$action})) {
 576         die_error(undef, "Unknown action");
 577 }
 578 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 579     !$project) {
 580         die_error(undef, "Project needed");
 581 }
 582 $actions{$action}->();
 583 exit;
 584
 585 ## ======================================================================
 586 ## action links
 587
 588 sub href(%) {
 589         my %params = @_;
 590         # default is to use -absolute url() i.e. $my_uri
 591         my $href = $params{-full} ? $my_url : $my_uri;
 592
 593         # XXX: Warning: If you touch this, check the search form for updating,
 594         # too.
 595
 596         my @mapping = (
 597                 project => "p",
 598                 action => "a",
 599                 file_name => "f",
 600                 file_parent => "fp",
 601                 hash => "h",
 602                 hash_parent => "hp",
 603                 hash_base => "hb",
 604                 hash_parent_base => "hpb",
 605                 page => "pg",
 606                 order => "o",
 607                 searchtext => "s",
 608                 searchtype => "st",
 609                 snapshot_format => "sf",
 610                 extra_options => "opt",
 611         );
 612         my %mapping = @mapping;
 613
 614         $params{'project'} = $project unless exists $params{'project'};
 615
 616         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 617         if ($use_pathinfo) {
 618                 # use PATH_INFO for project name
 619                 $href .= "/$params{'project'}" if defined $params{'project'};
 620                 delete $params{'project'};
 621
 622                 # Summary just uses the project path URL
 623                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 624                         delete $params{'action'};
 625                 }
 626         }
 627
 628         # now encode the parameters explicitly
 629         my @result = ();
 630         for (my $i = 0; $i < @mapping; $i += 2) {
 631                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 632                 if (defined $params{$name}) {
 633                         if (ref($params{$name}) eq "ARRAY") {
 634                                 foreach my $par (@{$params{$name}}) {
 635                                         push @result, $symbol . "=" . esc_param($par);
 636                                 }
 637                         } else {
 638                                 push @result, $symbol . "=" . esc_param($params{$name});
 639                         }
 640                 }
 641         }
 642         $href .= "?" . join(';', @result) if scalar @result;
 643
 644         return $href;
 645 }
 646
 647
 648 ## ======================================================================
 649 ## validation, quoting/unquoting and escaping
 650
 651 sub validate_pathname {
 652         my $input = shift || return undef;
 653
 654         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 655         # at the beginning, at the end, and between slashes.
 656         # also this catches doubled slashes
 657         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 658                 return undef;
 659         }
 660         # no null characters
 661         if ($input =~ m!\0!) {
 662                 return undef;
 663         }
 664         return $input;
 665 }
 666
 667 sub validate_refname {
 668         my $input = shift || return undef;
 669
 670         # textual hashes are O.K.
 671         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 672                 return $input;
 673         }
 674         # it must be correct pathname
 675         $input = validate_pathname($input)
 676                 or return undef;
 677         # restrictions on ref name according to git-check-ref-format
 678         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 # decode sequences of octets in utf8 into Perl's internal form,
 685 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 686 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 687 sub to_utf8 {
 688         my $str = shift;
 689         my $res;
 690         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 691         if (defined $res) {
 692                 return $res;
 693         } else {
 694                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 695         }
 696 }
 697
 698 # quote unsafe chars, but keep the slash, even when it's not
 699 # correct, but quoted slashes look too horrible in bookmarks
 700 sub esc_param {
 701         my $str = shift;
 702         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 703         $str =~ s/\+/%2B/g;
 704         $str =~ s/ /\+/g;
 705         return $str;
 706 }
 707
 708 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 709 sub esc_url {
 710         my $str = shift;
 711         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 712         $str =~ s/\+/%2B/g;
 713         $str =~ s/ /\+/g;
 714         return $str;
 715 }
 716
 717 # replace invalid utf8 character with SUBSTITUTION sequence
 718 sub esc_html ($;%) {
 719         my $str = shift;
 720         my %opts = @_;
 721
 722         $str = to_utf8($str);
 723         $str = $cgi->escapeHTML($str);
 724         if ($opts{'-nbsp'}) {
 725                 $str =~ s/ /&nbsp;/g;
 726         }
 727         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 728         return $str;
 729 }
 730
 731 # quote control characters and escape filename to HTML
 732 sub esc_path {
 733         my $str = shift;
 734         my %opts = @_;
 735
 736         $str = to_utf8($str);
 737         $str = $cgi->escapeHTML($str);
 738         if ($opts{'-nbsp'}) {
 739                 $str =~ s/ /&nbsp;/g;
 740         }
 741         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 742         return $str;
 743 }
 744
 745 # Make control characters "printable", using character escape codes (CEC)
 746 sub quot_cec {
 747         my $cntrl = shift;
 748         my %es = ( # character escape codes, aka escape sequences
 749                    "\t" => '\t',   # tab            (HT)
 750                    "\n" => '\n',   # line feed      (LF)
 751                    "\r" => '\r',   # carrige return (CR)
 752                    "\f" => '\f',   # form feed      (FF)
 753                    "\b" => '\b',   # backspace      (BS)
 754                    "\a" => '\a',   # alarm (bell)   (BEL)
 755                    "\e" => '\e',   # escape         (ESC)
 756                    "\013" => '\v', # vertical tab   (VT)
 757                    "\000" => '\0', # nul character  (NUL)
 758                    );
 759         my $chr = ( (exists $es{$cntrl})
 760                     ? $es{$cntrl}
 761                     : sprintf('\%03o', ord($cntrl)) );
 762         return "<span class=\"cntrl\">$chr</span>";
 763 }
 764
 765 # Alternatively use unicode control pictures codepoints,
 766 # Unicode "printable representation" (PR)
 767 sub quot_upr {
 768         my $cntrl = shift;
 769         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 770         return "<span class=\"cntrl\">$chr</span>";
 771 }
 772
 773 # git may return quoted and escaped filenames
 774 sub unquote {
 775         my $str = shift;
 776
 777         sub unq {
 778                 my $seq = shift;
 779                 my %es = ( # character escape codes, aka escape sequences
 780                         't' => "\t",   # tab            (HT, TAB)
 781                         'n' => "\n",   # newline        (NL)
 782                         'r' => "\r",   # return         (CR)
 783                         'f' => "\f",   # form feed      (FF)
 784                         'b' => "\b",   # backspace      (BS)
 785                         'a' => "\a",   # alarm (bell)   (BEL)
 786                         'e' => "\e",   # escape         (ESC)
 787                         'v' => "\013", # vertical tab   (VT)
 788                 );
 789
 790                 if ($seq =~ m/^[0-7]{1,3}$/) {
 791                         # octal char sequence
 792                         return chr(oct($seq));
 793                 } elsif (exists $es{$seq}) {
 794                         # C escape sequence, aka character escape code
 795                         return $es{$seq}
 796                 }
 797                 # quoted ordinary character
 798                 return $seq;
 799         }
 800
 801         if ($str =~ m/^"(.*)"$/) {
 802                 # needs unquoting
 803                 $str = $1;
 804                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 805         }
 806         return $str;
 807 }
 808
 809 # escape tabs (convert tabs to spaces)
 810 sub untabify {
 811         my $line = shift;
 812
 813         while ((my $pos = index($line, "\t")) != -1) {
 814                 if (my $count = (8 - ($pos % 8))) {
 815                         my $spaces = ' ' x $count;
 816                         $line =~ s/\t/$spaces/;
 817                 }
 818         }
 819
 820         return $line;
 821 }
 822
 823 sub project_in_list {
 824         my $project = shift;
 825         my @list = git_get_projects_list();
 826         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 827 }
 828
 829 ## ----------------------------------------------------------------------
 830 ## HTML aware string manipulation
 831
 832 sub chop_str {
 833         my $str = shift;
 834         my $len = shift;
 835         my $add_len = shift || 10;
 836
 837         # allow only $len chars, but don't cut a word if it would fit in $add_len
 838         # if it doesn't fit, cut it if it's still longer than the dots we would add
 839         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 840         my $body = $1;
 841         my $tail = $2;
 842         if (length($tail) > 4) {
 843                 $tail = " ...";
 844                 $body =~ s/&[^;]*$//; # remove chopped character entities
 845         }
 846         return "$body$tail";
 847 }
 848
 849 ## ----------------------------------------------------------------------
 850 ## functions returning short strings
 851
 852 # CSS class for given age value (in seconds)
 853 sub age_class {
 854         my $age = shift;
 855
 856         if (!defined $age) {
 857                 return "noage";
 858         } elsif ($age < 60*60*2) {
 859                 return "age0";
 860         } elsif ($age < 60*60*24*2) {
 861                 return "age1";
 862         } else {
 863                 return "age2";
 864         }
 865 }
 866
 867 # convert age in seconds to "nn units ago" string
 868 sub age_string {
 869         my $age = shift;
 870         my $age_str;
 871
 872         if ($age > 60*60*24*365*2) {
 873                 $age_str = (int $age/60/60/24/365);
 874                 $age_str .= " years ago";
 875         } elsif ($age > 60*60*24*(365/12)*2) {
 876                 $age_str = int $age/60/60/24/(365/12);
 877                 $age_str .= " months ago";
 878         } elsif ($age > 60*60*24*7*2) {
 879                 $age_str = int $age/60/60/24/7;
 880                 $age_str .= " weeks ago";
 881         } elsif ($age > 60*60*24*2) {
 882                 $age_str = int $age/60/60/24;
 883                 $age_str .= " days ago";
 884         } elsif ($age > 60*60*2) {
 885                 $age_str = int $age/60/60;
 886                 $age_str .= " hours ago";
 887         } elsif ($age > 60*2) {
 888                 $age_str = int $age/60;
 889                 $age_str .= " min ago";
 890         } elsif ($age > 2) {
 891                 $age_str = int $age;
 892                 $age_str .= " sec ago";
 893         } else {
 894                 $age_str .= " right now";
 895         }
 896         return $age_str;
 897 }
 898
 899 use constant {
 900         S_IFINVALID => 0030000,
 901         S_IFGITLINK => 0160000,
 902 };
 903
 904 # submodule/subproject, a commit object reference
 905 sub S_ISGITLINK($) {
 906         my $mode = shift;
 907
 908         return (($mode & S_IFMT) == S_IFGITLINK)
 909 }
 910
 911 # convert file mode in octal to symbolic file mode string
 912 sub mode_str {
 913         my $mode = oct shift;
 914
 915         if (S_ISGITLINK($mode)) {
 916                 return 'm---------';
 917         } elsif (S_ISDIR($mode & S_IFMT)) {
 918                 return 'drwxr-xr-x';
 919         } elsif (S_ISLNK($mode)) {
 920                 return 'lrwxrwxrwx';
 921         } elsif (S_ISREG($mode)) {
 922                 # git cares only about the executable bit
 923                 if ($mode & S_IXUSR) {
 924                         return '-rwxr-xr-x';
 925                 } else {
 926                         return '-rw-r--r--';
 927                 };
 928         } else {
 929                 return '----------';
 930         }
 931 }
 932
 933 # convert file mode in octal to file type string
 934 sub file_type {
 935         my $mode = shift;
 936
 937         if ($mode !~ m/^[0-7]+$/) {
 938                 return $mode;
 939         } else {
 940                 $mode = oct $mode;
 941         }
 942
 943         if (S_ISGITLINK($mode)) {
 944                 return "submodule";
 945         } elsif (S_ISDIR($mode & S_IFMT)) {
 946                 return "directory";
 947         } elsif (S_ISLNK($mode)) {
 948                 return "symlink";
 949         } elsif (S_ISREG($mode)) {
 950                 return "file";
 951         } else {
 952                 return "unknown";
 953         }
 954 }
 955
 956 # convert file mode in octal to file type description string
 957 sub file_type_long {
 958         my $mode = shift;
 959
 960         if ($mode !~ m/^[0-7]+$/) {
 961                 return $mode;
 962         } else {
 963                 $mode = oct $mode;
 964         }
 965
 966         if (S_ISGITLINK($mode)) {
 967                 return "submodule";
 968         } elsif (S_ISDIR($mode & S_IFMT)) {
 969                 return "directory";
 970         } elsif (S_ISLNK($mode)) {
 971                 return "symlink";
 972         } elsif (S_ISREG($mode)) {
 973                 if ($mode & S_IXUSR) {
 974                         return "executable";
 975                 } else {
 976                         return "file";
 977                 };
 978         } else {
 979                 return "unknown";
 980         }
 981 }
 982
 983
 984 ## ----------------------------------------------------------------------
 985 ## functions returning short HTML fragments, or transforming HTML fragments
 986 ## which don't belong to other sections
 987
 988 # format line of commit message.
 989 sub format_log_line_html {
 990         my $line = shift;
 991
 992         $line = esc_html($line, -nbsp=>1);
 993         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 994                 my $hash_text = $1;
 995                 my $link =
 996                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 997                                 -class => "text"}, $hash_text);
 998                 $line =~ s/$hash_text/$link/;
 999         }
1000         return $line;
1001 }
1002
1003 # format marker of refs pointing to given object
1004 sub format_ref_marker {
1005         my ($refs, $id) = @_;
1006         my $markers = '';
1007
1008         if (defined $refs->{$id}) {
1009                 foreach my $ref (@{$refs->{$id}}) {
1010                         my ($type, $name) = qw();
1011                         # e.g. tags/v2.6.11 or heads/next
1012                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1013                                 $type = $1;
1014                                 $name = $2;
1015                         } else {
1016                                 $type = "ref";
1017                                 $name = $ref;
1018                         }
1019
1020                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1021                                     esc_html($name) . "</span>";
1022                 }
1023         }
1024
1025         if ($markers) {
1026                 return ' <span class="refs">'. $markers . '</span>';
1027         } else {
1028                 return "";
1029         }
1030 }
1031
1032 # format, perhaps shortened and with markers, title line
1033 sub format_subject_html {
1034         my ($long, $short, $href, $extra) = @_;
1035         $extra = '' unless defined($extra);
1036
1037         if (length($short) < length($long)) {
1038                 return $cgi->a({-href => $href, -class => "list subject",
1039                                 -title => to_utf8($long)},
1040                        esc_html($short) . $extra);
1041         } else {
1042                 return $cgi->a({-href => $href, -class => "list subject"},
1043                        esc_html($long)  . $extra);
1044         }
1045 }
1046
1047 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1048 sub format_git_diff_header_line {
1049         my $line = shift;
1050         my $diffinfo = shift;
1051         my ($from, $to) = @_;
1052
1053         if ($diffinfo->{'nparents'}) {
1054                 # combined diff
1055                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1056                 if ($to->{'href'}) {
1057                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1058                                          esc_path($to->{'file'}));
1059                 } else { # file was deleted (no href)
1060                         $line .= esc_path($to->{'file'});
1061                 }
1062         } else {
1063                 # "ordinary" diff
1064                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1065                 if ($from->{'href'}) {
1066                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1067                                          'a/' . esc_path($from->{'file'}));
1068                 } else { # file was added (no href)
1069                         $line .= 'a/' . esc_path($from->{'file'});
1070                 }
1071                 $line .= ' ';
1072                 if ($to->{'href'}) {
1073                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1074                                          'b/' . esc_path($to->{'file'}));
1075                 } else { # file was deleted
1076                         $line .= 'b/' . esc_path($to->{'file'});
1077                 }
1078         }
1079
1080         return "<div class=\"diff header\">$line</div>\n";
1081 }
1082
1083 # format extended diff header line, before patch itself
1084 sub format_extended_diff_header_line {
1085         my $line = shift;
1086         my $diffinfo = shift;
1087         my ($from, $to) = @_;
1088
1089         # match <path>
1090         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1091                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1092                                        esc_path($from->{'file'}));
1093         }
1094         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1095                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1096                                  esc_path($to->{'file'}));
1097         }
1098         # match single <mode>
1099         if ($line =~ m/\s(\d{6})$/) {
1100                 $line .= '<span class="info"> (' .
1101                          file_type_long($1) .
1102                          ')</span>';
1103         }
1104         # match <hash>
1105         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1106                 # can match only for combined diff
1107                 $line = 'index ';
1108                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1109                         if ($from->{'href'}[$i]) {
1110                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1111                                                   -class=>"hash"},
1112                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1113                         } else {
1114                                 $line .= '0' x 7;
1115                         }
1116                         # separator
1117                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1118                 }
1119                 $line .= '..';
1120                 if ($to->{'href'}) {
1121                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1122                                          substr($diffinfo->{'to_id'},0,7));
1123                 } else {
1124                         $line .= '0' x 7;
1125                 }
1126
1127         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1128                 # can match only for ordinary diff
1129                 my ($from_link, $to_link);
1130                 if ($from->{'href'}) {
1131                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1132                                              substr($diffinfo->{'from_id'},0,7));
1133                 } else {
1134                         $from_link = '0' x 7;
1135                 }
1136                 if ($to->{'href'}) {
1137                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1138                                            substr($diffinfo->{'to_id'},0,7));
1139                 } else {
1140                         $to_link = '0' x 7;
1141                 }
1142                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1143                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1144         }
1145
1146         return $line . "<br/>\n";
1147 }
1148
1149 # format from-file/to-file diff header
1150 sub format_diff_from_to_header {
1151         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1152         my $line;
1153         my $result = '';
1154
1155         $line = $from_line;
1156         #assert($line =~ m/^---/) if DEBUG;
1157         # no extra formatting for "^--- /dev/null"
1158         if (! $diffinfo->{'nparents'}) {
1159                 # ordinary (single parent) diff
1160                 if ($line =~ m!^--- "?a/!) {
1161                         if ($from->{'href'}) {
1162                                 $line = '--- a/' .
1163                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1164                                                 esc_path($from->{'file'}));
1165                         } else {
1166                                 $line = '--- a/' .
1167                                         esc_path($from->{'file'});
1168                         }
1169                 }
1170                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1171
1172         } else {
1173                 # combined diff (merge commit)
1174                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1175                         if ($from->{'href'}[$i]) {
1176                                 $line = '--- ' .
1177                                         $cgi->a({-href=>href(action=>"blobdiff",
1178                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1179                                                              hash_parent_base=>$parents[$i],
1180                                                              file_parent=>$from->{'file'}[$i],
1181                                                              hash=>$diffinfo->{'to_id'},
1182                                                              hash_base=>$hash,
1183                                                              file_name=>$to->{'file'}),
1184                                                  -class=>"path",
1185                                                  -title=>"diff" . ($i+1)},
1186                                                 $i+1) .
1187                                         '/' .
1188                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1189                                                 esc_path($from->{'file'}[$i]));
1190                         } else {
1191                                 $line = '--- /dev/null';
1192                         }
1193                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1194                 }
1195         }
1196
1197         $line = $to_line;
1198         #assert($line =~ m/^\+\+\+/) if DEBUG;
1199         # no extra formatting for "^+++ /dev/null"
1200         if ($line =~ m!^\+\+\+ "?b/!) {
1201                 if ($to->{'href'}) {
1202                         $line = '+++ b/' .
1203                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1204                                         esc_path($to->{'file'}));
1205                 } else {
1206                         $line = '+++ b/' .
1207                                 esc_path($to->{'file'});
1208                 }
1209         }
1210         $result .= qq!<div class="diff to_file">$line</div>\n!;
1211
1212         return $result;
1213 }
1214
1215 # create note for patch simplified by combined diff
1216 sub format_diff_cc_simplified {
1217         my ($diffinfo, @parents) = @_;
1218         my $result = '';
1219
1220         $result .= "<div class=\"diff header\">" .
1221                    "diff --cc ";
1222         if (!is_deleted($diffinfo)) {
1223                 $result .= $cgi->a({-href => href(action=>"blob",
1224                                                   hash_base=>$hash,
1225                                                   hash=>$diffinfo->{'to_id'},
1226                                                   file_name=>$diffinfo->{'to_file'}),
1227                                     -class => "path"},
1228                                    esc_path($diffinfo->{'to_file'}));
1229         } else {
1230                 $result .= esc_path($diffinfo->{'to_file'});
1231         }
1232         $result .= "</div>\n" . # class="diff header"
1233                    "<div class=\"diff nodifferences\">" .
1234                    "Simple merge" .
1235                    "</div>\n"; # class="diff nodifferences"
1236
1237         return $result;
1238 }
1239
1240 # format patch (diff) line (not to be used for diff headers)
1241 sub format_diff_line {
1242         my $line = shift;
1243         my ($from, $to) = @_;
1244         my $diff_class = "";
1245
1246         chomp $line;
1247
1248         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1249                 # combined diff
1250                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1251                 if ($line =~ m/^\@{3}/) {
1252                         $diff_class = " chunk_header";
1253                 } elsif ($line =~ m/^\\/) {
1254                         $diff_class = " incomplete";
1255                 } elsif ($prefix =~ tr/+/+/) {
1256                         $diff_class = " add";
1257                 } elsif ($prefix =~ tr/-/-/) {
1258                         $diff_class = " rem";
1259                 }
1260         } else {
1261                 # assume ordinary diff
1262                 my $char = substr($line, 0, 1);
1263                 if ($char eq '+') {
1264                         $diff_class = " add";
1265                 } elsif ($char eq '-') {
1266                         $diff_class = " rem";
1267                 } elsif ($char eq '@') {
1268                         $diff_class = " chunk_header";
1269                 } elsif ($char eq "\\") {
1270                         $diff_class = " incomplete";
1271                 }
1272         }
1273         $line = untabify($line);
1274         if ($from && $to && $line =~ m/^\@{2} /) {
1275                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1276                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1277
1278                 $from_lines = 0 unless defined $from_lines;
1279                 $to_lines   = 0 unless defined $to_lines;
1280
1281                 if ($from->{'href'}) {
1282                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1283                                              -class=>"list"}, $from_text);
1284                 }
1285                 if ($to->{'href'}) {
1286                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1287                                              -class=>"list"}, $to_text);
1288                 }
1289                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1290                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1291                 return "<div class=\"diff$diff_class\">$line</div>\n";
1292         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1293                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1294                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1295
1296                 @from_text = split(' ', $ranges);
1297                 for (my $i = 0; $i < @from_text; ++$i) {
1298                         ($from_start[$i], $from_nlines[$i]) =
1299                                 (split(',', substr($from_text[$i], 1)), 0);
1300                 }
1301
1302                 $to_text   = pop @from_text;
1303                 $to_start  = pop @from_start;
1304                 $to_nlines = pop @from_nlines;
1305
1306                 $line = "<span class=\"chunk_info\">$prefix ";
1307                 for (my $i = 0; $i < @from_text; ++$i) {
1308                         if ($from->{'href'}[$i]) {
1309                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1310                                                   -class=>"list"}, $from_text[$i]);
1311                         } else {
1312                                 $line .= $from_text[$i];
1313                         }
1314                         $line .= " ";
1315                 }
1316                 if ($to->{'href'}) {
1317                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1318                                           -class=>"list"}, $to_text);
1319                 } else {
1320                         $line .= $to_text;
1321                 }
1322                 $line .= " $prefix</span>" .
1323                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1324                 return "<div class=\"diff$diff_class\">$line</div>\n";
1325         }
1326         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1327 }
1328
1329 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1330 # linked.  Pass the hash of the tree/commit to snapshot.
1331 sub format_snapshot_links {
1332         my ($hash) = @_;
1333         my @snapshot_fmts = gitweb_check_feature('snapshot');
1334         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1335         my $num_fmts = @snapshot_fmts;
1336         if ($num_fmts > 1) {
1337                 # A parenthesized list of links bearing format names.
1338                 # e.g. "snapshot (_tar.gz_ _zip_)"
1339                 return "snapshot (" . join(' ', map
1340                         $cgi->a({
1341                                 -href => href(
1342                                         action=>"snapshot",
1343                                         hash=>$hash,
1344                                         snapshot_format=>$_
1345                                 )
1346                         }, $known_snapshot_formats{$_}{'display'})
1347                 , @snapshot_fmts) . ")";
1348         } elsif ($num_fmts == 1) {
1349                 # A single "snapshot" link whose tooltip bears the format name.
1350                 # i.e. "_snapshot_"
1351                 my ($fmt) = @snapshot_fmts;
1352                 return
1353                         $cgi->a({
1354                                 -href => href(
1355                                         action=>"snapshot",
1356                                         hash=>$hash,
1357                                         snapshot_format=>$fmt
1358                                 ),
1359                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1360                         }, "snapshot");
1361         } else { # $num_fmts == 0
1362                 return undef;
1363         }
1364 }
1365
1366 ## ----------------------------------------------------------------------
1367 ## git utility subroutines, invoking git commands
1368
1369 # returns path to the core git executable and the --git-dir parameter as list
1370 sub git_cmd {
1371         return $GIT, '--git-dir='.$git_dir;
1372 }
1373
1374 # returns path to the core git executable and the --git-dir parameter as string
1375 sub git_cmd_str {
1376         return join(' ', git_cmd());
1377 }
1378
1379 # get HEAD ref of given project as hash
1380 sub git_get_head_hash {
1381         my $project = shift;
1382         my $o_git_dir = $git_dir;
1383         my $retval = undef;
1384         $git_dir = "$projectroot/$project";
1385         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1386                 my $head = <$fd>;
1387                 close $fd;
1388                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1389                         $retval = $1;
1390                 }
1391         }
1392         if (defined $o_git_dir) {
1393                 $git_dir = $o_git_dir;
1394         }
1395         return $retval;
1396 }
1397
1398 # get type of given object
1399 sub git_get_type {
1400         my $hash = shift;
1401
1402         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1403         my $type = <$fd>;
1404         close $fd or return;
1405         chomp $type;
1406         return $type;
1407 }
1408
1409 sub git_get_project_config {
1410         my ($key, $type) = @_;
1411
1412         return unless ($key);
1413         $key =~ s/^gitweb\.//;
1414         return if ($key =~ m/\W/);
1415
1416         my @x = (git_cmd(), 'config');
1417         if (defined $type) { push @x, $type; }
1418         push @x, "--get";
1419         push @x, "gitweb.$key";
1420         my $val = qx(@x);
1421         chomp $val;
1422         return ($val);
1423 }
1424
1425 # get hash of given path at given ref
1426 sub git_get_hash_by_path {
1427         my $base = shift;
1428         my $path = shift || return undef;
1429         my $type = shift;
1430
1431         $path =~ s,/+$,,;
1432
1433         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1434                 or die_error(undef, "Open git-ls-tree failed");
1435         my $line = <$fd>;
1436         close $fd or return undef;
1437
1438         if (!defined $line) {
1439                 # there is no tree or hash given by $path at $base
1440                 return undef;
1441         }
1442
1443         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1444         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1445         if (defined $type && $type ne $2) {
1446                 # type doesn't match
1447                 return undef;
1448         }
1449         return $3;
1450 }
1451
1452 # get path of entry with given hash at given tree-ish (ref)
1453 # used to get 'from' filename for combined diff (merge commit) for renames
1454 sub git_get_path_by_hash {
1455         my $base = shift || return;
1456         my $hash = shift || return;
1457
1458         local $/ = "\0";
1459
1460         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1461                 or return undef;
1462         while (my $line = <$fd>) {
1463                 chomp $line;
1464
1465                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1466                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1467                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1468                         close $fd;
1469                         return $1;
1470                 }
1471         }
1472         close $fd;
1473         return undef;
1474 }
1475
1476 ## ......................................................................
1477 ## git utility functions, directly accessing git repository
1478
1479 sub git_get_project_description {
1480         my $path = shift;
1481
1482         open my $fd, "$projectroot/$path/description" or return undef;
1483         my $descr = <$fd>;
1484         close $fd;
1485         if (defined $descr) {
1486                 chomp $descr;
1487         }
1488         return $descr;
1489 }
1490
1491 sub git_get_project_url_list {
1492         my $path = shift;
1493
1494         open my $fd, "$projectroot/$path/cloneurl" or return;
1495         my @git_project_url_list = map { chomp; $_ } <$fd>;
1496         close $fd;
1497
1498         return wantarray ? @git_project_url_list : \@git_project_url_list;
1499 }
1500
1501 sub git_get_projects_list {
1502         my ($filter) = @_;
1503         my @list;
1504
1505         $filter ||= '';
1506         $filter =~ s/\.git$//;
1507
1508         my ($check_forks) = gitweb_check_feature('forks');
1509
1510         if (-d $projects_list) {
1511                 # search in directory
1512                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1513                 # remove the trailing "/"
1514                 $dir =~ s!/+$!!;
1515                 my $pfxlen = length("$dir");
1516
1517                 File::Find::find({
1518                         follow_fast => 1, # follow symbolic links
1519                         follow_skip => 2, # ignore duplicates
1520                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1521                         wanted => sub {
1522                                 # skip project-list toplevel, if we get it.
1523                                 return if (m!^[/.]$!);
1524                                 # only directories can be git repositories
1525                                 return unless (-d $_);
1526
1527                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1528                                 # we check related file in $projectroot
1529                                 if ($check_forks and $subdir =~ m#/.#) {
1530                                         $File::Find::prune = 1;
1531                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1532                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1533                                         $File::Find::prune = 1;
1534                                 }
1535                         },
1536                 }, "$dir");
1537
1538         } elsif (-f $projects_list) {
1539                 # read from file(url-encoded):
1540                 # 'git%2Fgit.git Linus+Torvalds'
1541                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1542                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1543                 my %paths;
1544                 open my ($fd), $projects_list or return;
1545         PROJECT:
1546                 while (my $line = <$fd>) {
1547                         chomp $line;
1548                         my ($path, $owner) = split ' ', $line;
1549                         $path = unescape($path);
1550                         $owner = unescape($owner);
1551                         if (!defined $path) {
1552                                 next;
1553                         }
1554                         if ($filter ne '') {
1555                                 # looking for forks;
1556                                 my $pfx = substr($path, 0, length($filter));
1557                                 if ($pfx ne $filter) {
1558                                         next PROJECT;
1559                                 }
1560                                 my $sfx = substr($path, length($filter));
1561                                 if ($sfx !~ /^\/.*\.git$/) {
1562                                         next PROJECT;
1563                                 }
1564                         } elsif ($check_forks) {
1565                         PATH:
1566                                 foreach my $filter (keys %paths) {
1567                                         # looking for forks;
1568                                         my $pfx = substr($path, 0, length($filter));
1569                                         if ($pfx ne $filter) {
1570                                                 next PATH;
1571                                         }
1572                                         my $sfx = substr($path, length($filter));
1573                                         if ($sfx !~ /^\/.*\.git$/) {
1574                                                 next PATH;
1575                                         }
1576                                         # is a fork, don't include it in
1577                                         # the list
1578                                         next PROJECT;
1579                                 }
1580                         }
1581                         if (check_export_ok("$projectroot/$path")) {
1582                                 my $pr = {
1583                                         path => $path,
1584                                         owner => to_utf8($owner),
1585                                 };
1586                                 push @list, $pr;
1587                                 (my $forks_path = $path) =~ s/\.git$//;
1588                                 $paths{$forks_path}++;
1589                         }
1590                 }
1591                 close $fd;
1592         }
1593         return @list;
1594 }
1595
1596 our $gitweb_project_owner = undef;
1597 sub git_get_project_list_from_file {
1598
1599         return if (defined $gitweb_project_owner);
1600
1601         $gitweb_project_owner = {};
1602         # read from file (url-encoded):
1603         # 'git%2Fgit.git Linus+Torvalds'
1604         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1605         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1606         if (-f $projects_list) {
1607                 open (my $fd , $projects_list);
1608                 while (my $line = <$fd>) {
1609                         chomp $line;
1610                         my ($pr, $ow) = split ' ', $line;
1611                         $pr = unescape($pr);
1612                         $ow = unescape($ow);
1613                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1614                 }
1615                 close $fd;
1616         }
1617 }
1618
1619 sub git_get_project_owner {
1620         my $project = shift;
1621         my $owner;
1622
1623         return undef unless $project;
1624
1625         if (!defined $gitweb_project_owner) {
1626                 git_get_project_list_from_file();
1627         }
1628
1629         if (exists $gitweb_project_owner->{$project}) {
1630                 $owner = $gitweb_project_owner->{$project};
1631         }
1632         if (!defined $owner) {
1633                 $owner = get_file_owner("$projectroot/$project");
1634         }
1635
1636         return $owner;
1637 }
1638
1639 sub git_get_last_activity {
1640         my ($path) = @_;
1641         my $fd;
1642
1643         $git_dir = "$projectroot/$path";
1644         open($fd, "-|", git_cmd(), 'for-each-ref',
1645              '--format=%(committer)',
1646              '--sort=-committerdate',
1647              '--count=1',
1648              'refs/heads') or return;
1649         my $most_recent = <$fd>;
1650         close $fd or return;
1651         if (defined $most_recent &&
1652             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1653                 my $timestamp = $1;
1654                 my $age = time - $timestamp;
1655                 return ($age, age_string($age));
1656         }
1657         return (undef, undef);
1658 }
1659
1660 sub git_get_references {
1661         my $type = shift || "";
1662         my %refs;
1663         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1664         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1665         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1666                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1667                 or return;
1668
1669         while (my $line = <$fd>) {
1670                 chomp $line;
1671                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1672                         if (defined $refs{$1}) {
1673                                 push @{$refs{$1}}, $2;
1674                         } else {
1675                                 $refs{$1} = [ $2 ];
1676                         }
1677                 }
1678         }
1679         close $fd or return;
1680         return \%refs;
1681 }
1682
1683 sub git_get_rev_name_tags {
1684         my $hash = shift || return undef;
1685
1686         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1687                 or return;
1688         my $name_rev = <$fd>;
1689         close $fd;
1690
1691         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1692                 return $1;
1693         } else {
1694                 # catches also '$hash undefined' output
1695                 return undef;
1696         }
1697 }
1698
1699 ## ----------------------------------------------------------------------
1700 ## parse to hash functions
1701
1702 sub parse_date {
1703         my $epoch = shift;
1704         my $tz = shift || "-0000";
1705
1706         my %date;
1707         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1708         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1709         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1710         $date{'hour'} = $hour;
1711         $date{'minute'} = $min;
1712         $date{'mday'} = $mday;
1713         $date{'day'} = $days[$wday];
1714         $date{'month'} = $months[$mon];
1715         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1716                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1717         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1718                              $mday, $months[$mon], $hour ,$min;
1719         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1720                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1721
1722         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1723         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1724         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1725         $date{'hour_local'} = $hour;
1726         $date{'minute_local'} = $min;
1727         $date{'tz_local'} = $tz;
1728         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1729                                   1900+$year, $mon+1, $mday,
1730                                   $hour, $min, $sec, $tz);
1731         return %date;
1732 }
1733
1734 sub parse_tag {
1735         my $tag_id = shift;
1736         my %tag;
1737         my @comment;
1738
1739         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1740         $tag{'id'} = $tag_id;
1741         while (my $line = <$fd>) {
1742                 chomp $line;
1743                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1744                         $tag{'object'} = $1;
1745                 } elsif ($line =~ m/^type (.+)$/) {
1746                         $tag{'type'} = $1;
1747                 } elsif ($line =~ m/^tag (.+)$/) {
1748                         $tag{'name'} = $1;
1749                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1750                         $tag{'author'} = $1;
1751                         $tag{'epoch'} = $2;
1752                         $tag{'tz'} = $3;
1753                 } elsif ($line =~ m/--BEGIN/) {
1754                         push @comment, $line;
1755                         last;
1756                 } elsif ($line eq "") {
1757                         last;
1758                 }
1759         }
1760         push @comment, <$fd>;
1761         $tag{'comment'} = \@comment;
1762         close $fd or return;
1763         if (!defined $tag{'name'}) {
1764                 return
1765         };
1766         return %tag
1767 }
1768
1769 sub parse_commit_text {
1770         my ($commit_text, $withparents) = @_;
1771         my @commit_lines = split '\n', $commit_text;
1772         my %co;
1773
1774         pop @commit_lines; # Remove '\0'
1775
1776         if (! @commit_lines) {
1777                 return;
1778         }
1779
1780         my $header = shift @commit_lines;
1781         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1782                 return;
1783         }
1784         ($co{'id'}, my @parents) = split ' ', $header;
1785         while (my $line = shift @commit_lines) {
1786                 last if $line eq "\n";
1787                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1788                         $co{'tree'} = $1;
1789                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1790                         push @parents, $1;
1791                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1792                         $co{'author'} = $1;
1793                         $co{'author_epoch'} = $2;
1794                         $co{'author_tz'} = $3;
1795                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1796                                 $co{'author_name'}  = $1;
1797                                 $co{'author_email'} = $2;
1798                         } else {
1799                                 $co{'author_name'} = $co{'author'};
1800                         }
1801                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1802                         $co{'committer'} = $1;
1803                         $co{'committer_epoch'} = $2;
1804                         $co{'committer_tz'} = $3;
1805                         $co{'committer_name'} = $co{'committer'};
1806                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1807                                 $co{'committer_name'}  = $1;
1808                                 $co{'committer_email'} = $2;
1809                         } else {
1810                                 $co{'committer_name'} = $co{'committer'};
1811                         }
1812                 }
1813         }
1814         if (!defined $co{'tree'}) {
1815                 return;
1816         };
1817         $co{'parents'} = \@parents;
1818         $co{'parent'} = $parents[0];
1819
1820         foreach my $title (@commit_lines) {
1821                 $title =~ s/^    //;
1822                 if ($title ne "") {
1823                         $co{'title'} = chop_str($title, 80, 5);
1824                         # remove leading stuff of merges to make the interesting part visible
1825                         if (length($title) > 50) {
1826                                 $title =~ s/^Automatic //;
1827                                 $title =~ s/^merge (of|with) /Merge ... /i;
1828                                 if (length($title) > 50) {
1829                                         $title =~ s/(http|rsync):\/\///;
1830                                 }
1831                                 if (length($title) > 50) {
1832                                         $title =~ s/(master|www|rsync)\.//;
1833                                 }
1834                                 if (length($title) > 50) {
1835                                         $title =~ s/kernel.org:?//;
1836                                 }
1837                                 if (length($title) > 50) {
1838                                         $title =~ s/\/pub\/scm//;
1839                                 }
1840                         }
1841                         $co{'title_short'} = chop_str($title, 50, 5);
1842                         last;
1843                 }
1844         }
1845         if ($co{'title'} eq "") {
1846                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1847         }
1848         # remove added spaces
1849         foreach my $line (@commit_lines) {
1850                 $line =~ s/^    //;
1851         }
1852         $co{'comment'} = \@commit_lines;
1853
1854         my $age = time - $co{'committer_epoch'};
1855         $co{'age'} = $age;
1856         $co{'age_string'} = age_string($age);
1857         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1858         if ($age > 60*60*24*7*2) {
1859                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1860                 $co{'age_string_age'} = $co{'age_string'};
1861         } else {
1862                 $co{'age_string_date'} = $co{'age_string'};
1863                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1864         }
1865         return %co;
1866 }
1867
1868 sub parse_commit {
1869         my ($commit_id) = @_;
1870         my %co;
1871
1872         local $/ = "\0";
1873
1874         open my $fd, "-|", git_cmd(), "rev-list",
1875                 "--parents",
1876                 "--header",
1877                 "--max-count=1",
1878                 $commit_id,
1879                 "--",
1880                 or die_error(undef, "Open git-rev-list failed");
1881         %co = parse_commit_text(<$fd>, 1);
1882         close $fd;
1883
1884         return %co;
1885 }
1886
1887 sub parse_commits {
1888         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1889         my @cos;
1890
1891         $maxcount ||= 1;
1892         $skip ||= 0;
1893
1894         local $/ = "\0";
1895
1896         open my $fd, "-|", git_cmd(), "rev-list",
1897                 "--header",
1898                 ($arg ? ($arg) : ()),
1899                 ("--max-count=" . $maxcount),
1900                 ("--skip=" . $skip),
1901                 @extra_options,
1902                 $commit_id,
1903                 "--",
1904                 ($filename ? ($filename) : ())
1905                 or die_error(undef, "Open git-rev-list failed");
1906         while (my $line = <$fd>) {
1907                 my %co = parse_commit_text($line);
1908                 push @cos, \%co;
1909         }
1910         close $fd;
1911
1912         return wantarray ? @cos : \@cos;
1913 }
1914
1915 # parse ref from ref_file, given by ref_id, with given type
1916 sub parse_ref {
1917         my $ref_file = shift;
1918         my $ref_id = shift;
1919         my $type = shift || git_get_type($ref_id);
1920         my %ref_item;
1921
1922         $ref_item{'type'} = $type;
1923         $ref_item{'id'} = $ref_id;
1924         $ref_item{'epoch'} = 0;
1925         $ref_item{'age'} = "unknown";
1926         if ($type eq "tag") {
1927                 my %tag = parse_tag($ref_id);
1928                 $ref_item{'comment'} = $tag{'comment'};
1929                 if ($tag{'type'} eq "commit") {
1930                         my %co = parse_commit($tag{'object'});
1931                         $ref_item{'epoch'} = $co{'committer_epoch'};
1932                         $ref_item{'age'} = $co{'age_string'};
1933                 } elsif (defined($tag{'epoch'})) {
1934                         my $age = time - $tag{'epoch'};
1935                         $ref_item{'epoch'} = $tag{'epoch'};
1936                         $ref_item{'age'} = age_string($age);
1937                 }
1938                 $ref_item{'reftype'} = $tag{'type'};
1939                 $ref_item{'name'} = $tag{'name'};
1940                 $ref_item{'refid'} = $tag{'object'};
1941         } elsif ($type eq "commit"){
1942                 my %co = parse_commit($ref_id);
1943                 $ref_item{'reftype'} = "commit";
1944                 $ref_item{'name'} = $ref_file;
1945                 $ref_item{'title'} = $co{'title'};
1946                 $ref_item{'refid'} = $ref_id;
1947                 $ref_item{'epoch'} = $co{'committer_epoch'};
1948                 $ref_item{'age'} = $co{'age_string'};
1949         } else {
1950                 $ref_item{'reftype'} = $type;
1951                 $ref_item{'name'} = $ref_file;
1952                 $ref_item{'refid'} = $ref_id;
1953         }
1954
1955         return %ref_item;
1956 }
1957
1958 # parse line of git-diff-tree "raw" output
1959 sub parse_difftree_raw_line {
1960         my $line = shift;
1961         my %res;
1962
1963         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1964         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1965         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1966                 $res{'from_mode'} = $1;
1967                 $res{'to_mode'} = $2;
1968                 $res{'from_id'} = $3;
1969                 $res{'to_id'} = $4;
1970                 $res{'status'} = $5;
1971                 $res{'similarity'} = $6;
1972                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1973                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1974                 } else {
1975                         $res{'file'} = unquote($7);
1976                 }
1977         }
1978         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1979         # combined diff (for merge commit)
1980         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1981                 $res{'nparents'}  = length($1);
1982                 $res{'from_mode'} = [ split(' ', $2) ];
1983                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1984                 $res{'from_id'} = [ split(' ', $3) ];
1985                 $res{'to_id'} = pop @{$res{'from_id'}};
1986                 $res{'status'} = [ split('', $4) ];
1987                 $res{'to_file'} = unquote($5);
1988         }
1989         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1990         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1991                 $res{'commit'} = $1;
1992         }
1993
1994         return wantarray ? %res : \%res;
1995 }
1996
1997 # parse line of git-ls-tree output
1998 sub parse_ls_tree_line ($;%) {
1999         my $line = shift;
2000         my %opts = @_;
2001         my %res;
2002
2003         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2004         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2005
2006         $res{'mode'} = $1;
2007         $res{'type'} = $2;
2008         $res{'hash'} = $3;
2009         if ($opts{'-z'}) {
2010                 $res{'name'} = $4;
2011         } else {
2012                 $res{'name'} = unquote($4);
2013         }
2014
2015         return wantarray ? %res : \%res;
2016 }
2017
2018 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2019 sub parse_from_to_diffinfo {
2020         my ($diffinfo, $from, $to, @parents) = @_;
2021
2022         if ($diffinfo->{'nparents'}) {
2023                 # combined diff
2024                 $from->{'file'} = [];
2025                 $from->{'href'} = [];
2026                 fill_from_file_info($diffinfo, @parents)
2027                         unless exists $diffinfo->{'from_file'};
2028                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2029                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2030                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2031                                 $from->{'href'}[$i] = href(action=>"blob",
2032                                                            hash_base=>$parents[$i],
2033                                                            hash=>$diffinfo->{'from_id'}[$i],
2034                                                            file_name=>$from->{'file'}[$i]);
2035                         } else {
2036                                 $from->{'href'}[$i] = undef;
2037                         }
2038                 }
2039         } else {
2040                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2041                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2042                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2043                                                hash=>$diffinfo->{'from_id'},
2044                                                file_name=>$from->{'file'});
2045                 } else {
2046                         delete $from->{'href'};
2047                 }
2048         }
2049
2050         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2051         if (!is_deleted($diffinfo)) { # file exists in result
2052                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2053                                      hash=>$diffinfo->{'to_id'},
2054                                      file_name=>$to->{'file'});
2055         } else {
2056                 delete $to->{'href'};
2057         }
2058 }
2059
2060 ## ......................................................................
2061 ## parse to array of hashes functions
2062
2063 sub git_get_heads_list {
2064         my $limit = shift;
2065         my @headslist;
2066
2067         open my $fd, '-|', git_cmd(), 'for-each-ref',
2068                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2069                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2070                 'refs/heads'
2071                 or return;
2072         while (my $line = <$fd>) {
2073                 my %ref_item;
2074
2075                 chomp $line;
2076                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2077                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2078                 my ($committer, $epoch, $tz) =
2079                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2080                 $name =~ s!^refs/heads/!!;
2081
2082                 $ref_item{'name'}  = $name;
2083                 $ref_item{'id'}    = $hash;
2084                 $ref_item{'title'} = $title || '(no commit message)';
2085                 $ref_item{'epoch'} = $epoch;
2086                 if ($epoch) {
2087                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2088                 } else {
2089                         $ref_item{'age'} = "unknown";
2090                 }
2091
2092                 push @headslist, \%ref_item;
2093         }
2094         close $fd;
2095
2096         return wantarray ? @headslist : \@headslist;
2097 }
2098
2099 sub git_get_tags_list {
2100         my $limit = shift;
2101         my @tagslist;
2102
2103         open my $fd, '-|', git_cmd(), 'for-each-ref',
2104                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2105                 '--format=%(objectname) %(objecttype) %(refname) '.
2106                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2107                 'refs/tags'
2108                 or return;
2109         while (my $line = <$fd>) {
2110                 my %ref_item;
2111
2112                 chomp $line;
2113                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2114                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2115                 my ($creator, $epoch, $tz) =
2116                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2117                 $name =~ s!^refs/tags/!!;
2118
2119                 $ref_item{'type'} = $type;
2120                 $ref_item{'id'} = $id;
2121                 $ref_item{'name'} = $name;
2122                 if ($type eq "tag") {
2123                         $ref_item{'subject'} = $title;
2124                         $ref_item{'reftype'} = $reftype;
2125                         $ref_item{'refid'}   = $refid;
2126                 } else {
2127                         $ref_item{'reftype'} = $type;
2128                         $ref_item{'refid'}   = $id;
2129                 }
2130
2131                 if ($type eq "tag" || $type eq "commit") {
2132                         $ref_item{'epoch'} = $epoch;
2133                         if ($epoch) {
2134                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2135                         } else {
2136                                 $ref_item{'age'} = "unknown";
2137                         }
2138                 }
2139
2140                 push @tagslist, \%ref_item;
2141         }
2142         close $fd;
2143
2144         return wantarray ? @tagslist : \@tagslist;
2145 }
2146
2147 ## ----------------------------------------------------------------------
2148 ## filesystem-related functions
2149
2150 sub get_file_owner {
2151         my $path = shift;
2152
2153         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2154         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2155         if (!defined $gcos) {
2156                 return undef;
2157         }
2158         my $owner = $gcos;
2159         $owner =~ s/[,;].*$//;
2160         return to_utf8($owner);
2161 }
2162
2163 ## ......................................................................
2164 ## mimetype related functions
2165
2166 sub mimetype_guess_file {
2167         my $filename = shift;
2168         my $mimemap = shift;
2169         -r $mimemap or return undef;
2170
2171         my %mimemap;
2172         open(MIME, $mimemap) or return undef;
2173         while (<MIME>) {
2174                 next if m/^#/; # skip comments
2175                 my ($mime, $exts) = split(/\t+/);
2176                 if (defined $exts) {
2177                         my @exts = split(/\s+/, $exts);
2178                         foreach my $ext (@exts) {
2179                                 $mimemap{$ext} = $mime;
2180                         }
2181                 }
2182         }
2183         close(MIME);
2184
2185         $filename =~ /\.([^.]*)$/;
2186         return $mimemap{$1};
2187 }
2188
2189 sub mimetype_guess {
2190         my $filename = shift;
2191         my $mime;
2192         $filename =~ /\./ or return undef;
2193
2194         if ($mimetypes_file) {
2195                 my $file = $mimetypes_file;
2196                 if ($file !~ m!^/!) { # if it is relative path
2197                         # it is relative to project
2198                         $file = "$projectroot/$project/$file";
2199                 }
2200                 $mime = mimetype_guess_file($filename, $file);
2201         }
2202         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2203         return $mime;
2204 }
2205
2206 sub blob_mimetype {
2207         my $fd = shift;
2208         my $filename = shift;
2209
2210         if ($filename) {
2211                 my $mime = mimetype_guess($filename);
2212                 $mime and return $mime;
2213         }
2214
2215         # just in case
2216         return $default_blob_plain_mimetype unless $fd;
2217
2218         if (-T $fd) {
2219                 return 'text/plain' .
2220                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2221         } elsif (! $filename) {
2222                 return 'application/octet-stream';
2223         } elsif ($filename =~ m/\.png$/i) {
2224                 return 'image/png';
2225         } elsif ($filename =~ m/\.gif$/i) {
2226                 return 'image/gif';
2227         } elsif ($filename =~ m/\.jpe?g$/i) {
2228                 return 'image/jpeg';
2229         } else {
2230                 return 'application/octet-stream';
2231         }
2232 }
2233
2234 ## ======================================================================
2235 ## functions printing HTML: header, footer, error page
2236
2237 sub git_header_html {
2238         my $status = shift || "200 OK";
2239         my $expires = shift;
2240
2241         my $title = "$site_name";
2242         if (defined $project) {
2243                 $title .= " - " . to_utf8($project);
2244                 if (defined $action) {
2245                         $title .= "/$action";
2246                         if (defined $file_name) {
2247                                 $title .= " - " . esc_path($file_name);
2248                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2249                                         $title .= "/";
2250                                 }
2251                         }
2252                 }
2253         }
2254         my $content_type;
2255         # require explicit support from the UA if we are to send the page as
2256         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2257         # we have to do this because MSIE sometimes globs '*/*', pretending to
2258         # support xhtml+xml but choking when it gets what it asked for.
2259         if (defined $cgi->http('HTTP_ACCEPT') &&
2260             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2261             $cgi->Accept('application/xhtml+xml') != 0) {
2262                 $content_type = 'application/xhtml+xml';
2263         } else {
2264                 $content_type = 'text/html';
2265         }
2266         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2267                            -status=> $status, -expires => $expires);
2268         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2269         print <<EOF;
2270 <?xml version="1.0" encoding="utf-8"?>
2271 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2272 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2273 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2274 <!-- git core binaries version $git_version -->
2275 <head>
2276 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2277 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2278 <meta name="robots" content="index, nofollow"/>
2279 <title>$title</title>
2280 EOF
2281 # print out each stylesheet that exist
2282         if (defined $stylesheet) {
2283 #provides backwards capability for those people who define style sheet in a config file
2284                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2285         } else {
2286                 foreach my $stylesheet (@stylesheets) {
2287                         next unless $stylesheet;
2288                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2289                 }
2290         }
2291         if (defined $project) {
2292                 printf('<link rel="alternate" title="%s log RSS feed" '.
2293                        'href="%s" type="application/rss+xml" />'."\n",
2294                        esc_param($project), href(action=>"rss"));
2295                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2296                        'href="%s" type="application/rss+xml" />'."\n",
2297                        esc_param($project), href(action=>"rss",
2298                                                  extra_options=>"--no-merges"));
2299                 printf('<link rel="alternate" title="%s log Atom feed" '.
2300                        'href="%s" type="application/atom+xml" />'."\n",
2301                        esc_param($project), href(action=>"atom"));
2302                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2303                        'href="%s" type="application/atom+xml" />'."\n",
2304                        esc_param($project), href(action=>"atom",
2305                                                  extra_options=>"--no-merges"));
2306         } else {
2307                 printf('<link rel="alternate" title="%s projects list" '.
2308                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2309                        $site_name, href(project=>undef, action=>"project_index"));
2310                 printf('<link rel="alternate" title="%s projects feeds" '.
2311                        'href="%s" type="text/x-opml"/>'."\n",
2312                        $site_name, href(project=>undef, action=>"opml"));
2313         }
2314         if (defined $favicon) {
2315                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2316         }
2317
2318         print "</head>\n" .
2319               "<body>\n";
2320
2321         if (-f $site_header) {
2322                 open (my $fd, $site_header);
2323                 print <$fd>;
2324                 close $fd;
2325         }
2326
2327         print "<div class=\"page_header\">\n" .
2328               $cgi->a({-href => esc_url($logo_url),
2329                        -title => $logo_label},
2330                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2331         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2332         if (defined $project) {
2333                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2334                 if (defined $action) {
2335                         print " / $action";
2336                 }
2337                 print "\n";
2338         }
2339         print "</div>\n";
2340
2341         my ($have_search) = gitweb_check_feature('search');
2342         if ((defined $project) && ($have_search)) {
2343                 if (!defined $searchtext) {
2344                         $searchtext = "";
2345                 }
2346                 my $search_hash;
2347                 if (defined $hash_base) {
2348                         $search_hash = $hash_base;
2349                 } elsif (defined $hash) {
2350                         $search_hash = $hash;
2351                 } else {
2352                         $search_hash = "HEAD";
2353                 }
2354                 my $action = $my_uri;
2355                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2356                 if ($use_pathinfo) {
2357                         $action .= "/$project";
2358                 } else {
2359                         $cgi->param("p", $project);
2360                 }
2361                 $cgi->param("a", "search");
2362                 $cgi->param("h", $search_hash);
2363                 print $cgi->startform(-method => "get", -action => $action) .
2364                       "<div class=\"search\">\n" .
2365                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2366                       $cgi->hidden(-name => "a") . "\n" .
2367                       $cgi->hidden(-name => "h") . "\n" .
2368                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2369                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2370                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2371                       " search:\n",
2372                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2373                       "</div>" .
2374                       $cgi->end_form() . "\n";
2375         }
2376 }
2377
2378 sub git_footer_html {
2379         print "<div class=\"page_footer\">\n";
2380         if (defined $project) {
2381                 my $descr = git_get_project_description($project);
2382                 if (defined $descr) {
2383                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2384                 }
2385                 print $cgi->a({-href => href(action=>"rss"),
2386                               -class => "rss_logo"}, "RSS") . " ";
2387                 print $cgi->a({-href => href(action=>"atom"),
2388                               -class => "rss_logo"}, "Atom") . "\n";
2389         } else {
2390                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2391                               -class => "rss_logo"}, "OPML") . " ";
2392                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2393                               -class => "rss_logo"}, "TXT") . "\n";
2394         }
2395         print "</div>\n" ;
2396
2397         if (-f $site_footer) {
2398                 open (my $fd, $site_footer);
2399                 print <$fd>;
2400                 close $fd;
2401         }
2402
2403         print "</body>\n" .
2404               "</html>";
2405 }
2406
2407 sub die_error {
2408         my $status = shift || "403 Forbidden";
2409         my $error = shift || "Malformed query, file missing or permission denied";
2410
2411         git_header_html($status);
2412         print <<EOF;
2413 <div class="page_body">
2414 <br /><br />
2415 $status - $error
2416 <br />
2417 </div>
2418 EOF
2419         git_footer_html();
2420         exit;
2421 }
2422
2423 ## ----------------------------------------------------------------------
2424 ## functions printing or outputting HTML: navigation
2425
2426 sub git_print_page_nav {
2427         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2428         $extra = '' if !defined $extra; # pager or formats
2429
2430         my @navs = qw(summary shortlog log commit commitdiff tree);
2431         if ($suppress) {
2432                 @navs = grep { $_ ne $suppress } @navs;
2433         }
2434
2435         my %arg = map { $_ => {action=>$_} } @navs;
2436         if (defined $head) {
2437                 for (qw(commit commitdiff)) {
2438                         $arg{$_}{'hash'} = $head;
2439                 }
2440                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2441                         for (qw(shortlog log)) {
2442                                 $arg{$_}{'hash'} = $head;
2443                         }
2444                 }
2445         }
2446         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2447         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2448
2449         print "<div class=\"page_nav\">\n" .
2450                 (join " | ",
2451                  map { $_ eq $current ?
2452                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2453                  } @navs);
2454         print "<br/>\n$extra<br/>\n" .
2455               "</div>\n";
2456 }
2457
2458 sub format_paging_nav {
2459         my ($action, $hash, $head, $page, $nrevs) = @_;
2460         my $paging_nav;
2461
2462
2463         if ($hash ne $head || $page) {
2464                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2465         } else {
2466                 $paging_nav .= "HEAD";
2467         }
2468
2469         if ($page > 0) {
2470                 $paging_nav .= " &sdot; " .
2471                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2472                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2473         } else {
2474                 $paging_nav .= " &sdot; prev";
2475         }
2476
2477         if ($nrevs >= (100 * ($page+1)-1)) {
2478                 $paging_nav .= " &sdot; " .
2479                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2480                                  -accesskey => "n", -title => "Alt-n"}, "next");
2481         } else {
2482                 $paging_nav .= " &sdot; next";
2483         }
2484
2485         return $paging_nav;
2486 }
2487
2488 ## ......................................................................
2489 ## functions printing or outputting HTML: div
2490
2491 sub git_print_header_div {
2492         my ($action, $title, $hash, $hash_base) = @_;
2493         my %args = ();
2494
2495         $args{'action'} = $action;
2496         $args{'hash'} = $hash if $hash;
2497         $args{'hash_base'} = $hash_base if $hash_base;
2498
2499         print "<div class=\"header\">\n" .
2500               $cgi->a({-href => href(%args), -class => "title"},
2501               $title ? $title : $action) .
2502               "\n</div>\n";
2503 }
2504
2505 #sub git_print_authorship (\%) {
2506 sub git_print_authorship {
2507         my $co = shift;
2508
2509         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2510         print "<div class=\"author_date\">" .
2511               esc_html($co->{'author_name'}) .
2512               " [$ad{'rfc2822'}";
2513         if ($ad{'hour_local'} < 6) {
2514                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2515                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2516         } else {
2517                 printf(" (%02d:%02d %s)",
2518                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2519         }
2520         print "]</div>\n";
2521 }
2522
2523 sub git_print_page_path {
2524         my $name = shift;
2525         my $type = shift;
2526         my $hb = shift;
2527
2528
2529         print "<div class=\"page_path\">";
2530         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2531                       -title => 'tree root'}, to_utf8("[$project]"));
2532         print " / ";
2533         if (defined $name) {
2534                 my @dirname = split '/', $name;
2535                 my $basename = pop @dirname;
2536                 my $fullname = '';
2537
2538                 foreach my $dir (@dirname) {
2539                         $fullname .= ($fullname ? '/' : '') . $dir;
2540                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2541                                                      hash_base=>$hb),
2542                                       -title => $fullname}, esc_path($dir));
2543                         print " / ";
2544                 }
2545                 if (defined $type && $type eq 'blob') {
2546                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2547                                                      hash_base=>$hb),
2548                                       -title => $name}, esc_path($basename));
2549                 } elsif (defined $type && $type eq 'tree') {
2550                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2551                                                      hash_base=>$hb),
2552                                       -title => $name}, esc_path($basename));
2553                         print " / ";
2554                 } else {
2555                         print esc_path($basename);
2556                 }
2557         }
2558         print "<br/></div>\n";
2559 }
2560
2561 # sub git_print_log (\@;%) {
2562 sub git_print_log ($;%) {
2563         my $log = shift;
2564         my %opts = @_;
2565
2566         if ($opts{'-remove_title'}) {
2567                 # remove title, i.e. first line of log
2568                 shift @$log;
2569         }
2570         # remove leading empty lines
2571         while (defined $log->[0] && $log->[0] eq "") {
2572                 shift @$log;
2573         }
2574
2575         # print log
2576         my $signoff = 0;
2577         my $empty = 0;
2578         foreach my $line (@$log) {
2579                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2580                         $signoff = 1;
2581                         $empty = 0;
2582                         if (! $opts{'-remove_signoff'}) {
2583                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2584                                 next;
2585                         } else {
2586                                 # remove signoff lines
2587                                 next;
2588                         }
2589                 } else {
2590                         $signoff = 0;
2591                 }
2592
2593                 # print only one empty line
2594                 # do not print empty line after signoff
2595                 if ($line eq "") {
2596                         next if ($empty || $signoff);
2597                         $empty = 1;
2598                 } else {
2599                         $empty = 0;
2600                 }
2601
2602                 print format_log_line_html($line) . "<br/>\n";
2603         }
2604
2605         if ($opts{'-final_empty_line'}) {
2606                 # end with single empty line
2607                 print "<br/>\n" unless $empty;
2608         }
2609 }
2610
2611 # return link target (what link points to)
2612 sub git_get_link_target {
2613         my $hash = shift;
2614         my $link_target;
2615
2616         # read link
2617         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2618                 or return;
2619         {
2620                 local $/;
2621                 $link_target = <$fd>;
2622         }
2623         close $fd
2624                 or return;
2625
2626         return $link_target;
2627 }
2628
2629 # given link target, and the directory (basedir) the link is in,
2630 # return target of link relative to top directory (top tree);
2631 # return undef if it is not possible (including absolute links).
2632 sub normalize_link_target {
2633         my ($link_target, $basedir, $hash_base) = @_;
2634
2635         # we can normalize symlink target only if $hash_base is provided
2636         return unless $hash_base;
2637
2638         # absolute symlinks (beginning with '/') cannot be normalized
2639         return if (substr($link_target, 0, 1) eq '/');
2640
2641         # normalize link target to path from top (root) tree (dir)
2642         my $path;
2643         if ($basedir) {
2644                 $path = $basedir . '/' . $link_target;
2645         } else {
2646                 # we are in top (root) tree (dir)
2647                 $path = $link_target;
2648         }
2649
2650         # remove //, /./, and /../
2651         my @path_parts;
2652         foreach my $part (split('/', $path)) {
2653                 # discard '.' and ''
2654                 next if (!$part || $part eq '.');
2655                 # handle '..'
2656                 if ($part eq '..') {
2657                         if (@path_parts) {
2658                                 pop @path_parts;
2659                         } else {
2660                                 # link leads outside repository (outside top dir)
2661                                 return;
2662                         }
2663                 } else {
2664                         push @path_parts, $part;
2665                 }
2666         }
2667         $path = join('/', @path_parts);
2668
2669         return $path;
2670 }
2671
2672 # print tree entry (row of git_tree), but without encompassing <tr> element
2673 sub git_print_tree_entry {
2674         my ($t, $basedir, $hash_base, $have_blame) = @_;
2675
2676         my %base_key = ();
2677         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2678
2679         # The format of a table row is: mode list link.  Where mode is
2680         # the mode of the entry, list is the name of the entry, an href,
2681         # and link is the action links of the entry.
2682
2683         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2684         if ($t->{'type'} eq "blob") {
2685                 print "<td class=\"list\">" .
2686                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2687                                                file_name=>"$basedir$t->{'name'}", %base_key),
2688                                 -class => "list"}, esc_path($t->{'name'}));
2689                 if (S_ISLNK(oct $t->{'mode'})) {
2690                         my $link_target = git_get_link_target($t->{'hash'});
2691                         if ($link_target) {
2692                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2693                                 if (defined $norm_target) {
2694                                         print " -> " .
2695                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2696                                                                      file_name=>$norm_target),
2697                                                        -title => $norm_target}, esc_path($link_target));
2698                                 } else {
2699                                         print " -> " . esc_path($link_target);
2700                                 }
2701                         }
2702                 }
2703                 print "</td>\n";
2704                 print "<td class=\"link\">";
2705                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2706                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2707                               "blob");
2708                 if ($have_blame) {
2709                         print " | " .
2710                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2711                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2712                                       "blame");
2713                 }
2714                 if (defined $hash_base) {
2715                         print " | " .
2716                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2717                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2718                                       "history");
2719                 }
2720                 print " | " .
2721                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2722                                                file_name=>"$basedir$t->{'name'}")},
2723                                 "raw");
2724                 print "</td>\n";
2725
2726         } elsif ($t->{'type'} eq "tree") {
2727                 print "<td class=\"list\">";
2728                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2729                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2730                               esc_path($t->{'name'}));
2731                 print "</td>\n";
2732                 print "<td class=\"link\">";
2733                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2734                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2735                               "tree");
2736                 if (defined $hash_base) {
2737                         print " | " .
2738                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2739                                                      file_name=>"$basedir$t->{'name'}")},
2740                                       "history");
2741                 }
2742                 print "</td>\n";
2743         } else {
2744                 # unknown object: we can only present history for it
2745                 # (this includes 'commit' object, i.e. submodule support)
2746                 print "<td class=\"list\">" .
2747                       esc_path($t->{'name'}) .
2748                       "</td>\n";
2749                 print "<td class=\"link\">";
2750                 if (defined $hash_base) {
2751                         print $cgi->a({-href => href(action=>"history",
2752                                                      hash_base=>$hash_base,
2753                                                      file_name=>"$basedir$t->{'name'}")},
2754                                       "history");
2755                 }
2756                 print "</td>\n";
2757         }
2758 }
2759
2760 ## ......................................................................
2761 ## functions printing large fragments of HTML
2762
2763 sub fill_from_file_info {
2764         my ($diff, @parents) = @_;
2765
2766         $diff->{'from_file'} = [ ];
2767         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2768         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2769                 if ($diff->{'status'}[$i] eq 'R' ||
2770                     $diff->{'status'}[$i] eq 'C') {
2771                         $diff->{'from_file'}[$i] =
2772                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2773                 }
2774         }
2775
2776         return $diff;
2777 }
2778
2779 # parameters can be strings, or references to arrays of strings
2780 sub from_ids_eq {
2781         my ($a, $b) = @_;
2782
2783         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2784                 for (my $i = 0; $i < @$a; ++$i) {
2785                         return 0 unless ($a->[$i] eq $b->[$i]);
2786                 }
2787                 return 1;
2788         } elsif (!ref($a) && !ref($b)) {
2789                 return $a eq $b;
2790         } else {
2791                 return 0;
2792         }
2793 }
2794
2795 sub is_deleted {
2796         my $diffinfo = shift;
2797
2798         return $diffinfo->{'to_id'} eq ('0' x 40);
2799 }
2800
2801 sub git_difftree_body {
2802         my ($difftree, $hash, @parents) = @_;
2803         my ($parent) = $parents[0];
2804         my ($have_blame) = gitweb_check_feature('blame');
2805         print "<div class=\"list_head\">\n";
2806         if ($#{$difftree} > 10) {
2807                 print(($#{$difftree} + 1) . " files changed:\n");
2808         }
2809         print "</div>\n";
2810
2811         print "<table class=\"" .
2812               (@parents > 1 ? "combined " : "") .
2813               "diff_tree\">\n";
2814
2815         # header only for combined diff in 'commitdiff' view
2816         my $has_header = @parents > 1 && $action eq 'commitdiff';
2817         if ($has_header) {
2818                 # table header
2819                 print "<thead><tr>\n" .
2820                        "<th></th><th></th>\n"; # filename, patchN link
2821                 for (my $i = 0; $i < @parents; $i++) {
2822                         my $par = $parents[$i];
2823                         print "<th>" .
2824                               $cgi->a({-href => href(action=>"commitdiff",
2825                                                      hash=>$hash, hash_parent=>$par),
2826                                        -title => 'commitdiff to parent number ' .
2827                                                   ($i+1) . ': ' . substr($par,0,7)},
2828                                       $i+1) .
2829                               "&nbsp;</th>\n";
2830                 }
2831                 print "</tr></thead>\n<tbody>\n";
2832         }
2833
2834         my $alternate = 1;
2835         my $patchno = 0;
2836         foreach my $line (@{$difftree}) {
2837                 my $diff;
2838                 if (ref($line) eq "HASH") {
2839                         # pre-parsed (or generated by hand)
2840                         $diff = $line;
2841                 } else {
2842                         $diff = parse_difftree_raw_line($line);
2843                 }
2844
2845                 if ($alternate) {
2846                         print "<tr class=\"dark\">\n";
2847                 } else {
2848                         print "<tr class=\"light\">\n";
2849                 }
2850                 $alternate ^= 1;
2851
2852                 if (exists $diff->{'nparents'}) { # combined diff
2853
2854                         fill_from_file_info($diff, @parents)
2855                                 unless exists $diff->{'from_file'};
2856
2857                         if (!is_deleted($diff)) {
2858                                 # file exists in the result (child) commit
2859                                 print "<td>" .
2860                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2861                                                              file_name=>$diff->{'to_file'},
2862                                                              hash_base=>$hash),
2863                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2864                                       "</td>\n";
2865                         } else {
2866                                 print "<td>" .
2867                                       esc_path($diff->{'to_file'}) .
2868                                       "</td>\n";
2869                         }
2870
2871                         if ($action eq 'commitdiff') {
2872                                 # link to patch
2873                                 $patchno++;
2874                                 print "<td class=\"link\">" .
2875                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2876                                       " | " .
2877                                       "</td>\n";
2878                         }
2879
2880                         my $has_history = 0;
2881                         my $not_deleted = 0;
2882                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2883                                 my $hash_parent = $parents[$i];
2884                                 my $from_hash = $diff->{'from_id'}[$i];
2885                                 my $from_path = $diff->{'from_file'}[$i];
2886                                 my $status = $diff->{'status'}[$i];
2887
2888                                 $has_history ||= ($status ne 'A');
2889                                 $not_deleted ||= ($status ne 'D');
2890
2891                                 if ($status eq 'A') {
2892                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2893                                 } elsif ($status eq 'D') {
2894                                         print "<td class=\"link\">" .
2895                                               $cgi->a({-href => href(action=>"blob",
2896                                                                      hash_base=>$hash,
2897                                                                      hash=>$from_hash,
2898                                                                      file_name=>$from_path)},
2899                                                       "blob" . ($i+1)) .
2900                                               " | </td>\n";
2901                                 } else {
2902                                         if ($diff->{'to_id'} eq $from_hash) {
2903                                                 print "<td class=\"link nochange\">";
2904                                         } else {
2905                                                 print "<td class=\"link\">";
2906                                         }
2907                                         print $cgi->a({-href => href(action=>"blobdiff",
2908                                                                      hash=>$diff->{'to_id'},
2909                                                                      hash_parent=>$from_hash,
2910                                                                      hash_base=>$hash,
2911                                                                      hash_parent_base=>$hash_parent,
2912                                                                      file_name=>$diff->{'to_file'},
2913                                                                      file_parent=>$from_path)},
2914                                                       "diff" . ($i+1)) .
2915                                               " | </td>\n";
2916                                 }
2917                         }
2918
2919                         print "<td class=\"link\">";
2920                         if ($not_deleted) {
2921                                 print $cgi->a({-href => href(action=>"blob",
2922                                                              hash=>$diff->{'to_id'},
2923                                                              file_name=>$diff->{'to_file'},
2924                                                              hash_base=>$hash)},
2925                                               "blob");
2926                                 print " | " if ($has_history);
2927                         }
2928                         if ($has_history) {
2929                                 print $cgi->a({-href => href(action=>"history",
2930                                                              file_name=>$diff->{'to_file'},
2931                                                              hash_base=>$hash)},
2932                                               "history");
2933                         }
2934                         print "</td>\n";
2935
2936                         print "</tr>\n";
2937                         next; # instead of 'else' clause, to avoid extra indent
2938                 }
2939                 # else ordinary diff
2940
2941                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2942                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2943                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2944                         $to_mode_oct = oct $diff->{'to_mode'};
2945                         if (S_ISREG($to_mode_oct)) { # only for regular file
2946                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2947                         }
2948                         $to_file_type = file_type($diff->{'to_mode'});
2949                 }
2950                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2951                         $from_mode_oct = oct $diff->{'from_mode'};
2952                         if (S_ISREG($to_mode_oct)) { # only for regular file
2953                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2954                         }
2955                         $from_file_type = file_type($diff->{'from_mode'});
2956                 }
2957
2958                 if ($diff->{'status'} eq "A") { # created
2959                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2960                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2961                         $mode_chng   .= "]</span>";
2962                         print "<td>";
2963                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2964                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2965                                       -class => "list"}, esc_path($diff->{'file'}));
2966                         print "</td>\n";
2967                         print "<td>$mode_chng</td>\n";
2968                         print "<td class=\"link\">";
2969                         if ($action eq 'commitdiff') {
2970                                 # link to patch
2971                                 $patchno++;
2972                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2973                                 print " | ";
2974                         }
2975                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2976                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2977                                       "blob");
2978                         print "</td>\n";
2979
2980                 } elsif ($diff->{'status'} eq "D") { # deleted
2981                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2982                         print "<td>";
2983                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2984                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2985                                        -class => "list"}, esc_path($diff->{'file'}));
2986                         print "</td>\n";
2987                         print "<td>$mode_chng</td>\n";
2988                         print "<td class=\"link\">";
2989                         if ($action eq 'commitdiff') {
2990                                 # link to patch
2991                                 $patchno++;
2992                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2993                                 print " | ";
2994                         }
2995                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2996                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2997                                       "blob") . " | ";
2998                         if ($have_blame) {
2999                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3000                                                              file_name=>$diff->{'file'})},
3001                                               "blame") . " | ";
3002                         }
3003                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3004                                                      file_name=>$diff->{'file'})},
3005                                       "history");
3006                         print "</td>\n";
3007
3008                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3009                         my $mode_chnge = "";
3010                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3011                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3012                                 if ($from_file_type ne $to_file_type) {
3013                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3014                                 }
3015                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3016                                         if ($from_mode_str && $to_mode_str) {
3017                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3018                                         } elsif ($to_mode_str) {
3019                                                 $mode_chnge .= " mode: $to_mode_str";
3020                                         }
3021                                 }
3022                                 $mode_chnge .= "]</span>\n";
3023                         }
3024                         print "<td>";
3025                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3026                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3027                                       -class => "list"}, esc_path($diff->{'file'}));
3028                         print "</td>\n";
3029                         print "<td>$mode_chnge</td>\n";
3030                         print "<td class=\"link\">";
3031                         if ($action eq 'commitdiff') {
3032                                 # link to patch
3033                                 $patchno++;
3034                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3035                                       " | ";
3036                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3037                                 # "commit" view and modified file (not onlu mode changed)
3038                                 print $cgi->a({-href => href(action=>"blobdiff",
3039                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3040                                                              hash_base=>$hash, hash_parent_base=>$parent,
3041                                                              file_name=>$diff->{'file'})},
3042                                               "diff") .
3043                                       " | ";
3044                         }
3045                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3046                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3047                                        "blob") . " | ";
3048                         if ($have_blame) {
3049                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3050                                                              file_name=>$diff->{'file'})},
3051                                               "blame") . " | ";
3052                         }
3053                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3054                                                      file_name=>$diff->{'file'})},
3055                                       "history");
3056                         print "</td>\n";
3057
3058                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3059                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3060                         my $nstatus = $status_name{$diff->{'status'}};
3061                         my $mode_chng = "";
3062                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3063                                 # mode also for directories, so we cannot use $to_mode_str
3064                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3065                         }
3066                         print "<td>" .
3067                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3068                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3069                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3070                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3071                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3072                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3073                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3074                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3075                               "<td class=\"link\">";
3076                         if ($action eq 'commitdiff') {
3077                                 # link to patch
3078                                 $patchno++;
3079                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3080                                       " | ";
3081                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3082                                 # "commit" view and modified file (not only pure rename or copy)
3083                                 print $cgi->a({-href => href(action=>"blobdiff",
3084                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3085                                                              hash_base=>$hash, hash_parent_base=>$parent,
3086                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3087                                               "diff") .
3088                                       " | ";
3089                         }
3090                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3091                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3092                                       "blob") . " | ";
3093                         if ($have_blame) {
3094                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3095                                                              file_name=>$diff->{'to_file'})},
3096                                               "blame") . " | ";
3097                         }
3098                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3099                                                     file_name=>$diff->{'to_file'})},
3100                                       "history");
3101                         print "</td>\n";
3102
3103                 } # we should not encounter Unmerged (U) or Unknown (X) status
3104                 print "</tr>\n";
3105         }
3106         print "</tbody>" if $has_header;
3107         print "</table>\n";
3108 }
3109
3110 sub git_patchset_body {
3111         my ($fd, $difftree, $hash, @hash_parents) = @_;
3112         my ($hash_parent) = $hash_parents[0];
3113
3114         my $patch_idx = 0;
3115         my $patch_number = 0;
3116         my $patch_line;
3117         my $diffinfo;
3118         my (%from, %to);
3119
3120         print "<div class=\"patchset\">\n";
3121
3122         # skip to first patch
3123         while ($patch_line = <$fd>) {
3124                 chomp $patch_line;
3125
3126                 last if ($patch_line =~ m/^diff /);
3127         }
3128
3129  PATCH:
3130         while ($patch_line) {
3131                 my @diff_header;
3132                 my ($from_id, $to_id);
3133
3134                 # git diff header
3135                 #assert($patch_line =~ m/^diff /) if DEBUG;
3136                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3137                 $patch_number++;
3138                 push @diff_header, $patch_line;
3139
3140                 # extended diff header
3141         EXTENDED_HEADER:
3142                 while ($patch_line = <$fd>) {
3143                         chomp $patch_line;
3144
3145                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3146
3147                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3148                                 $from_id = $1;
3149                                 $to_id   = $2;
3150                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3151                                 $from_id = [ split(',', $1) ];
3152                                 $to_id   = $2;
3153                         }
3154
3155                         push @diff_header, $patch_line;
3156                 }
3157                 my $last_patch_line = $patch_line;
3158
3159                 # check if current patch belong to current raw line
3160                 # and parse raw git-diff line if needed
3161                 if (defined $diffinfo &&
3162                     defined $from_id && defined $to_id &&
3163                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3164                     $diffinfo->{'to_id'} eq $to_id) {
3165                         # this is continuation of a split patch
3166                         print "<div class=\"patch cont\">\n";
3167                 } else {
3168                         # advance raw git-diff output if needed
3169                         $patch_idx++ if defined $diffinfo;
3170
3171                         # compact combined diff output can have some patches skipped
3172                         # find which patch (using pathname of result) we are at now
3173                         my $to_name;
3174                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3175                                 $to_name = $1;
3176                         }
3177
3178                         do {
3179                                 # read and prepare patch information
3180                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3181                                         # pre-parsed (or generated by hand)
3182                                         $diffinfo = $difftree->[$patch_idx];
3183                                 } else {
3184                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3185                                 }
3186
3187                                 # check if current raw line has no patch (it got simplified)
3188                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3189                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3190                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3191                                               "</div>\n";  # class="patch"
3192
3193                                         $patch_idx++;
3194                                         $patch_number++;
3195                                 }
3196                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3197                                  $patch_idx > $#$difftree);
3198                         # modifies %from, %to hashes
3199                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3200                         if ($diffinfo->{'nparents'}) {
3201                                 # combined diff
3202                                 $from{'file'} = [];
3203                                 $from{'href'} = [];
3204                                 fill_from_file_info($diffinfo, @hash_parents)
3205                                         unless exists $diffinfo->{'from_file'};
3206                                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3207                                         $from{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
3208                                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3209                                                 $from{'href'}[$i] = href(action=>"blob",
3210                                                                          hash_base=>$hash_parents[$i],
3211                                                                          hash=>$diffinfo->{'from_id'}[$i],
3212                                                                          file_name=>$from{'file'}[$i]);
3213                                         } else {
3214                                                 $from{'href'}[$i] = undef;
3215                                         }
3216                                 }
3217                         } else {
3218                                 $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
3219                                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3220                                         $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3221                                                              hash=>$diffinfo->{'from_id'},
3222                                                              file_name=>$from{'file'});
3223                                 } else {
3224                                         delete $from{'href'};
3225                                 }
3226                         }
3227
3228                         $to{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
3229                         if (!is_deleted($diffinfo)) { # file exists in result
3230                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
3231                                                    hash=>$diffinfo->{'to_id'},
3232                                                    file_name=>$to{'file'});
3233                         } else {
3234                                 delete $to{'href'};
3235                         }
3236                         # this is first patch for raw difftree line with $patch_idx index
3237                         # we index @$difftree array from 0, but number patches from 1
3238                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3239                 }
3240
3241                 # print "git diff" header
3242                 $patch_line = shift @diff_header;
3243                 print format_git_diff_header_line($patch_line, $diffinfo,
3244                                                   \%from, \%to);
3245
3246                 # print extended diff header
3247                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3248         EXTENDED_HEADER:
3249                 foreach $patch_line (@diff_header) {
3250                         print format_extended_diff_header_line($patch_line, $diffinfo,
3251                                                                \%from, \%to);
3252                 }
3253                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3254
3255                 # from-file/to-file diff header
3256                 $patch_line = $last_patch_line;
3257                 if (! $patch_line) {
3258                         print "</div>\n"; # class="patch"
3259                         last PATCH;
3260                 }
3261                 next PATCH if ($patch_line =~ m/^diff /);
3262                 #assert($patch_line =~ m/^---/) if DEBUG;
3263                 #assert($patch_line eq $last_patch_line) if DEBUG;
3264
3265                 $patch_line = <$fd>;
3266                 chomp $patch_line;
3267                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3268
3269                 print format_diff_from_to_header($last_patch_line, $patch_line,
3270                                                  $diffinfo, \%from, \%to,
3271                                                  @hash_parents);
3272
3273                 # the patch itself
3274         LINE:
3275                 while ($patch_line = <$fd>) {
3276                         chomp $patch_line;
3277
3278                         next PATCH if ($patch_line =~ m/^diff /);
3279
3280                         print format_diff_line($patch_line, \%from, \%to);
3281                 }
3282
3283         } continue {
3284                 print "</div>\n"; # class="patch"
3285         }
3286
3287         # for compact combined (--cc) format, with chunk and patch simpliciaction
3288         # patchset might be empty, but there might be unprocessed raw lines
3289         for ($patch_idx++ if $patch_number > 0;
3290              $patch_idx < @$difftree;
3291              $patch_idx++) {
3292                 # read and prepare patch information
3293                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3294                         # pre-parsed (or generated by hand)
3295                         $diffinfo = $difftree->[$patch_idx];
3296                 } else {
3297                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3298                 }
3299
3300                 # generate anchor for "patch" links in difftree / whatchanged part
3301                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3302                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3303                       "</div>\n";  # class="patch"
3304
3305                 $patch_number++;
3306         }
3307
3308         if ($patch_number == 0) {
3309                 if (@hash_parents > 1) {
3310                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3311                 } else {
3312                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3313                 }
3314         }
3315
3316         print "</div>\n"; # class="patchset"
3317 }
3318
3319 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3320
3321 sub git_project_list_body {
3322         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3323
3324         my ($check_forks) = gitweb_check_feature('forks');
3325
3326         my @projects;
3327         foreach my $pr (@$projlist) {
3328                 my (@aa) = git_get_last_activity($pr->{'path'});
3329                 unless (@aa) {
3330                         next;
3331                 }
3332                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3333                 if (!defined $pr->{'descr'}) {
3334                         my $descr = git_get_project_description($pr->{'path'}) || "";
3335                         $pr->{'descr_long'} = to_utf8($descr);
3336                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3337                 }
3338                 if (!defined $pr->{'owner'}) {
3339                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3340                 }
3341                 if ($check_forks) {
3342                         my $pname = $pr->{'path'};
3343                         if (($pname =~ s/\.git$//) &&
3344                             ($pname !~ /\/$/) &&
3345                             (-d "$projectroot/$pname")) {
3346                                 $pr->{'forks'} = "-d $projectroot/$pname";
3347                         }
3348                         else {
3349                                 $pr->{'forks'} = 0;
3350                         }
3351                 }
3352                 push @projects, $pr;
3353         }
3354
3355         $order ||= $default_projects_order;
3356         $from = 0 unless defined $from;
3357         $to = $#projects if (!defined $to || $#projects < $to);
3358
3359         print "<table class=\"project_list\">\n";
3360         unless ($no_header) {
3361                 print "<tr>\n";
3362                 if ($check_forks) {
3363                         print "<th></th>\n";
3364                 }
3365                 if ($order eq "project") {
3366                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3367                         print "<th>Project</th>\n";
3368                 } else {
3369                         print "<th>" .
3370                               $cgi->a({-href => href(project=>undef, order=>'project'),
3371                                        -class => "header"}, "Project") .
3372                               "</th>\n";
3373                 }
3374                 if ($order eq "descr") {
3375                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3376                         print "<th>Description</th>\n";
3377                 } else {
3378                         print "<th>" .
3379                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3380                                        -class => "header"}, "Description") .
3381                               "</th>\n";
3382                 }
3383                 if ($order eq "owner") {
3384                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3385                         print "<th>Owner</th>\n";
3386                 } else {
3387                         print "<th>" .
3388                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3389                                        -class => "header"}, "Owner") .
3390                               "</th>\n";
3391                 }
3392                 if ($order eq "age") {
3393                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3394                         print "<th>Last Change</th>\n";
3395                 } else {
3396                         print "<th>" .
3397                               $cgi->a({-href => href(project=>undef, order=>'age'),
3398                                        -class => "header"}, "Last Change") .
3399                               "</th>\n";
3400                 }
3401                 print "<th></th>\n" .
3402                       "</tr>\n";
3403         }
3404         my $alternate = 1;
3405         for (my $i = $from; $i <= $to; $i++) {
3406                 my $pr = $projects[$i];
3407                 if ($alternate) {
3408                         print "<tr class=\"dark\">\n";
3409                 } else {
3410                         print "<tr class=\"light\">\n";
3411                 }
3412                 $alternate ^= 1;
3413                 if ($check_forks) {
3414                         print "<td>";
3415                         if ($pr->{'forks'}) {
3416                                 print "<!-- $pr->{'forks'} -->\n";
3417                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3418                         }
3419                         print "</td>\n";
3420                 }
3421                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3422                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3423                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3424                                         -class => "list", -title => $pr->{'descr_long'}},
3425                                         esc_html($pr->{'descr'})) . "</td>\n" .
3426                       "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
3427                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3428                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3429                       "<td class=\"link\">" .
3430                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3431                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3432                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3433                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3434                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3435                       "</td>\n" .
3436                       "</tr>\n";
3437         }
3438         if (defined $extra) {
3439                 print "<tr>\n";
3440                 if ($check_forks) {
3441                         print "<td></td>\n";
3442                 }
3443                 print "<td colspan=\"5\">$extra</td>\n" .
3444                       "</tr>\n";
3445         }
3446         print "</table>\n";
3447 }
3448
3449 sub git_shortlog_body {
3450         # uses global variable $project
3451         my ($commitlist, $from, $to, $refs, $extra) = @_;
3452
3453         $from = 0 unless defined $from;
3454         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3455
3456         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3457         my $alternate = 1;
3458         for (my $i = $from; $i <= $to; $i++) {
3459                 my %co = %{$commitlist->[$i]};
3460                 my $commit = $co{'id'};
3461                 my $ref = format_ref_marker($refs, $commit);
3462                 if ($alternate) {
3463                         print "<tr class=\"dark\">\n";
3464                 } else {
3465                         print "<tr class=\"light\">\n";
3466                 }
3467                 $alternate ^= 1;
3468                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3469                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3470                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3471                       "<td>";
3472                 print format_subject_html($co{'title'}, $co{'title_short'},
3473                                           href(action=>"commit", hash=>$commit), $ref);
3474                 print "</td>\n" .
3475                       "<td class=\"link\">" .
3476                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3477                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3478                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3479                 my $snapshot_links = format_snapshot_links($commit);
3480                 if (defined $snapshot_links) {
3481                         print " | " . $snapshot_links;
3482                 }
3483                 print "</td>\n" .
3484                       "</tr>\n";
3485         }
3486         if (defined $extra) {
3487                 print "<tr>\n" .
3488                       "<td colspan=\"4\">$extra</td>\n" .
3489                       "</tr>\n";
3490         }
3491         print "</table>\n";
3492 }
3493
3494 sub git_history_body {
3495         # Warning: assumes constant type (blob or tree) during history
3496         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3497
3498         $from = 0 unless defined $from;
3499         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3500
3501         print "<table class=\"history\" cellspacing=\"0\">\n";
3502         my $alternate = 1;
3503         for (my $i = $from; $i <= $to; $i++) {
3504                 my %co = %{$commitlist->[$i]};
3505                 if (!%co) {
3506                         next;
3507                 }
3508                 my $commit = $co{'id'};
3509
3510                 my $ref = format_ref_marker($refs, $commit);
3511
3512                 if ($alternate) {
3513                         print "<tr class=\"dark\">\n";
3514                 } else {
3515                         print "<tr class=\"light\">\n";
3516                 }
3517                 $alternate ^= 1;
3518                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3519                       # shortlog uses      chop_str($co{'author_name'}, 10)
3520                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3521                       "<td>";
3522                 # originally git_history used chop_str($co{'title'}, 50)
3523                 print format_subject_html($co{'title'}, $co{'title_short'},
3524                                           href(action=>"commit", hash=>$commit), $ref);
3525                 print "</td>\n" .
3526                       "<td class=\"link\">" .
3527                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3528                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3529
3530                 if ($ftype eq 'blob') {
3531                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3532                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3533                         if (defined $blob_current && defined $blob_parent &&
3534                                         $blob_current ne $blob_parent) {
3535                                 print " | " .
3536                                         $cgi->a({-href => href(action=>"blobdiff",
3537                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3538                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3539                                                                file_name=>$file_name)},
3540                                                 "diff to current");
3541                         }
3542                 }
3543                 print "</td>\n" .
3544                       "</tr>\n";
3545         }
3546         if (defined $extra) {
3547                 print "<tr>\n" .
3548                       "<td colspan=\"4\">$extra</td>\n" .
3549                       "</tr>\n";
3550         }
3551         print "</table>\n";
3552 }
3553
3554 sub git_tags_body {
3555         # uses global variable $project
3556         my ($taglist, $from, $to, $extra) = @_;
3557         $from = 0 unless defined $from;
3558         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3559
3560         print "<table class=\"tags\" cellspacing=\"0\">\n";
3561         my $alternate = 1;
3562         for (my $i = $from; $i <= $to; $i++) {
3563                 my $entry = $taglist->[$i];
3564                 my %tag = %$entry;
3565                 my $comment = $tag{'subject'};
3566                 my $comment_short;
3567                 if (defined $comment) {
3568                         $comment_short = chop_str($comment, 30, 5);
3569                 }
3570                 if ($alternate) {
3571                         print "<tr class=\"dark\">\n";
3572                 } else {
3573                         print "<tr class=\"light\">\n";
3574                 }
3575                 $alternate ^= 1;
3576                 if (defined $tag{'age'}) {
3577                         print "<td><i>$tag{'age'}</i></td>\n";
3578                 } else {
3579                         print "<td></td>\n";
3580                 }
3581                 print "<td>" .
3582                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3583                                -class => "list name"}, esc_html($tag{'name'})) .
3584                       "</td>\n" .
3585                       "<td>";
3586                 if (defined $comment) {
3587                         print format_subject_html($comment, $comment_short,
3588                                                   href(action=>"tag", hash=>$tag{'id'}));
3589                 }
3590                 print "</td>\n" .
3591                       "<td class=\"selflink\">";
3592                 if ($tag{'type'} eq "tag") {
3593                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3594                 } else {
3595                         print "&nbsp;";
3596                 }
3597                 print "</td>\n" .
3598                       "<td class=\"link\">" . " | " .
3599                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3600                 if ($tag{'reftype'} eq "commit") {
3601                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3602                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3603                 } elsif ($tag{'reftype'} eq "blob") {
3604                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3605                 }
3606                 print "</td>\n" .
3607                       "</tr>";
3608         }
3609         if (defined $extra) {
3610                 print "<tr>\n" .
3611                       "<td colspan=\"5\">$extra</td>\n" .
3612                       "</tr>\n";
3613         }
3614         print "</table>\n";
3615 }
3616
3617 sub git_heads_body {
3618         # uses global variable $project
3619         my ($headlist, $head, $from, $to, $extra) = @_;
3620         $from = 0 unless defined $from;
3621         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3622
3623         print "<table class=\"heads\" cellspacing=\"0\">\n";
3624         my $alternate = 1;
3625         for (my $i = $from; $i <= $to; $i++) {
3626                 my $entry = $headlist->[$i];
3627                 my %ref = %$entry;
3628                 my $curr = $ref{'id'} eq $head;
3629                 if ($alternate) {
3630                         print "<tr class=\"dark\">\n";
3631                 } else {
3632                         print "<tr class=\"light\">\n";
3633                 }
3634                 $alternate ^= 1;
3635                 print "<td><i>$ref{'age'}</i></td>\n" .
3636                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3637                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3638                                -class => "list name"},esc_html($ref{'name'})) .
3639                       "</td>\n" .
3640                       "<td class=\"link\">" .
3641                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3642                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3643                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3644                       "</td>\n" .
3645                       "</tr>";
3646         }
3647         if (defined $extra) {
3648                 print "<tr>\n" .
3649                       "<td colspan=\"3\">$extra</td>\n" .
3650                       "</tr>\n";
3651         }
3652         print "</table>\n";
3653 }
3654
3655 sub git_search_grep_body {
3656         my ($commitlist, $from, $to, $extra) = @_;
3657         $from = 0 unless defined $from;
3658         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3659
3660         print "<table class=\"grep\" cellspacing=\"0\">\n";
3661         my $alternate = 1;
3662         for (my $i = $from; $i <= $to; $i++) {
3663                 my %co = %{$commitlist->[$i]};
3664                 if (!%co) {
3665                         next;
3666                 }
3667                 my $commit = $co{'id'};
3668                 if ($alternate) {
3669                         print "<tr class=\"dark\">\n";
3670                 } else {
3671                         print "<tr class=\"light\">\n";
3672                 }
3673                 $alternate ^= 1;
3674                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3675                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3676                       "<td>" .
3677                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3678                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3679                 my $comment = $co{'comment'};
3680                 foreach my $line (@$comment) {
3681                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3682                                 my $lead = esc_html($1) || "";
3683                                 $lead = chop_str($lead, 30, 10);
3684                                 my $match = esc_html($2) || "";
3685                                 my $trail = esc_html($3) || "";
3686                                 $trail = chop_str($trail, 30, 10);
3687                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3688                                 print chop_str($text, 80, 5) . "<br/>\n";
3689                         }
3690                 }
3691                 print "</td>\n" .
3692                       "<td class=\"link\">" .
3693                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3694                       " | " .
3695                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3696                 print "</td>\n" .
3697                       "</tr>\n";
3698         }
3699         if (defined $extra) {
3700                 print "<tr>\n" .
3701                       "<td colspan=\"3\">$extra</td>\n" .
3702                       "</tr>\n";
3703         }
3704         print "</table>\n";
3705 }
3706
3707 ## ======================================================================
3708 ## ======================================================================
3709 ## actions
3710
3711 sub git_project_list {
3712         my $order = $cgi->param('o');
3713         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3714                 die_error(undef, "Unknown order parameter");
3715         }
3716
3717         my @list = git_get_projects_list();
3718         if (!@list) {
3719                 die_error(undef, "No projects found");
3720         }
3721
3722         git_header_html();
3723         if (-f $home_text) {
3724                 print "<div class=\"index_include\">\n";
3725                 open (my $fd, $home_text);
3726                 print <$fd>;
3727                 close $fd;
3728                 print "</div>\n";
3729         }
3730         git_project_list_body(\@list, $order);
3731         git_footer_html();
3732 }
3733
3734 sub git_forks {
3735         my $order = $cgi->param('o');
3736         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3737                 die_error(undef, "Unknown order parameter");
3738         }
3739
3740         my @list = git_get_projects_list($project);
3741         if (!@list) {
3742                 die_error(undef, "No forks found");
3743         }
3744
3745         git_header_html();
3746         git_print_page_nav('','');
3747         git_print_header_div('summary', "$project forks");
3748         git_project_list_body(\@list, $order);
3749         git_footer_html();
3750 }
3751
3752 sub git_project_index {
3753         my @projects = git_get_projects_list($project);
3754
3755         print $cgi->header(
3756                 -type => 'text/plain',
3757                 -charset => 'utf-8',
3758                 -content_disposition => 'inline; filename="index.aux"');
3759
3760         foreach my $pr (@projects) {
3761                 if (!exists $pr->{'owner'}) {
3762                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3763                 }
3764
3765                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3766                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3767                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3768                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3769                 $path  =~ s/ /\+/g;
3770                 $owner =~ s/ /\+/g;
3771
3772                 print "$path $owner\n";
3773         }
3774 }
3775
3776 sub git_summary {
3777         my $descr = git_get_project_description($project) || "none";
3778         my %co = parse_commit("HEAD");
3779         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3780         my $head = $co{'id'};
3781
3782         my $owner = git_get_project_owner($project);
3783
3784         my $refs = git_get_references();
3785         # These get_*_list functions return one more to allow us to see if
3786         # there are more ...
3787         my @taglist  = git_get_tags_list(16);
3788         my @headlist = git_get_heads_list(16);
3789         my @forklist;
3790         my ($check_forks) = gitweb_check_feature('forks');
3791
3792         if ($check_forks) {
3793                 @forklist = git_get_projects_list($project);
3794         }
3795
3796         git_header_html();
3797         git_print_page_nav('summary','', $head);
3798
3799         print "<div class=\"title\">&nbsp;</div>\n";
3800         print "<table cellspacing=\"0\">\n" .
3801               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3802               "<tr><td>owner</td><td>$owner</td></tr>\n";
3803         if (defined $cd{'rfc2822'}) {
3804                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3805         }
3806
3807         # use per project git URL list in $projectroot/$project/cloneurl
3808         # or make project git URL from git base URL and project name
3809         my $url_tag = "URL";
3810         my @url_list = git_get_project_url_list($project);
3811         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3812         foreach my $git_url (@url_list) {
3813                 next unless $git_url;
3814                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3815                 $url_tag = "";
3816         }
3817         print "</table>\n";
3818
3819         if (-s "$projectroot/$project/README.html") {
3820                 if (open my $fd, "$projectroot/$project/README.html") {
3821                         print "<div class=\"title\">readme</div>\n";
3822                         print $_ while (<$fd>);
3823                         close $fd;
3824                 }
3825         }
3826
3827         # we need to request one more than 16 (0..15) to check if
3828         # those 16 are all
3829         my @commitlist = $head ? parse_commits($head, 17) : ();
3830         if (@commitlist) {
3831                 git_print_header_div('shortlog');
3832                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3833                                   $#commitlist <=  15 ? undef :
3834                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3835         }
3836
3837         if (@taglist) {
3838                 git_print_header_div('tags');
3839                 git_tags_body(\@taglist, 0, 15,
3840                               $#taglist <=  15 ? undef :
3841                               $cgi->a({-href => href(action=>"tags")}, "..."));
3842         }
3843
3844         if (@headlist) {
3845                 git_print_header_div('heads');
3846                 git_heads_body(\@headlist, $head, 0, 15,
3847                                $#headlist <= 15 ? undef :
3848                                $cgi->a({-href => href(action=>"heads")}, "..."));
3849         }
3850
3851         if (@forklist) {
3852                 git_print_header_div('forks');
3853                 git_project_list_body(\@forklist, undef, 0, 15,
3854                                       $#forklist <= 15 ? undef :
3855                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3856                                       'noheader');
3857         }
3858
3859         git_footer_html();
3860 }
3861
3862 sub git_tag {
3863         my $head = git_get_head_hash($project);
3864         git_header_html();
3865         git_print_page_nav('','', $head,undef,$head);
3866         my %tag = parse_tag($hash);
3867
3868         if (! %tag) {
3869                 die_error(undef, "Unknown tag object");
3870         }
3871
3872         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3873         print "<div class=\"title_text\">\n" .
3874               "<table cellspacing=\"0\">\n" .
3875               "<tr>\n" .
3876               "<td>object</td>\n" .
3877               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3878                                $tag{'object'}) . "</td>\n" .
3879               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3880                                               $tag{'type'}) . "</td>\n" .
3881               "</tr>\n";
3882         if (defined($tag{'author'})) {
3883                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3884                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3885                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3886                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3887                         "</td></tr>\n";
3888         }
3889         print "</table>\n\n" .
3890               "</div>\n";
3891         print "<div class=\"page_body\">";
3892         my $comment = $tag{'comment'};
3893         foreach my $line (@$comment) {
3894                 chomp $line;
3895                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3896         }
3897         print "</div>\n";
3898         git_footer_html();
3899 }
3900
3901 sub git_blame2 {
3902         my $fd;
3903         my $ftype;
3904
3905         my ($have_blame) = gitweb_check_feature('blame');
3906         if (!$have_blame) {
3907                 die_error('403 Permission denied', "Permission denied");
3908         }
3909         die_error('404 Not Found', "File name not defined") if (!$file_name);
3910         $hash_base ||= git_get_head_hash($project);
3911         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3912         my %co = parse_commit($hash_base)
3913                 or die_error(undef, "Reading commit failed");
3914         if (!defined $hash) {
3915                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3916                         or die_error(undef, "Error looking up file");
3917         }
3918         $ftype = git_get_type($hash);
3919         if ($ftype !~ "blob") {
3920                 die_error('400 Bad Request', "Object is not a blob");
3921         }
3922         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3923               $file_name, $hash_base)
3924                 or die_error(undef, "Open git-blame failed");
3925         git_header_html();
3926         my $formats_nav =
3927                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3928                         "blob") .
3929                 " | " .
3930                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3931                         "history") .
3932                 " | " .
3933                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3934                         "HEAD");
3935         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3936         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3937         git_print_page_path($file_name, $ftype, $hash_base);
3938         my @rev_color = (qw(light2 dark2));
3939         my $num_colors = scalar(@rev_color);
3940         my $current_color = 0;
3941         my $last_rev;
3942         print <<HTML;
3943 <div class="page_body">
3944 <table class="blame">
3945 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3946 HTML
3947         my %metainfo = ();
3948         while (1) {
3949                 $_ = <$fd>;
3950                 last unless defined $_;
3951                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3952                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3953                 if (!exists $metainfo{$full_rev}) {
3954                         $metainfo{$full_rev} = {};
3955                 }
3956                 my $meta = $metainfo{$full_rev};
3957                 while (<$fd>) {
3958                         last if (s/^\t//);
3959                         if (/^(\S+) (.*)$/) {
3960                                 $meta->{$1} = $2;
3961                         }
3962                 }
3963                 my $data = $_;
3964                 chomp $data;
3965                 my $rev = substr($full_rev, 0, 8);
3966                 my $author = $meta->{'author'};
3967                 my %date = parse_date($meta->{'author-time'},
3968                                       $meta->{'author-tz'});
3969                 my $date = $date{'iso-tz'};
3970                 if ($group_size) {
3971                         $current_color = ++$current_color % $num_colors;
3972                 }
3973                 print "<tr class=\"$rev_color[$current_color]\">\n";
3974                 if ($group_size) {
3975                         print "<td class=\"sha1\"";
3976                         print " title=\"". esc_html($author) . ", $date\"";
3977                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3978                         print ">";
3979                         print $cgi->a({-href => href(action=>"commit",
3980                                                      hash=>$full_rev,
3981                                                      file_name=>$file_name)},
3982                                       esc_html($rev));
3983                         print "</td>\n";
3984                 }
3985                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3986                         or die_error(undef, "Open git-rev-parse failed");
3987                 my $parent_commit = <$dd>;
3988                 close $dd;
3989                 chomp($parent_commit);
3990                 my $blamed = href(action => 'blame',
3991                                   file_name => $meta->{'filename'},
3992                                   hash_base => $parent_commit);
3993                 print "<td class=\"linenr\">";
3994                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3995                                 -id => "l$lineno",
3996                                 -class => "linenr" },
3997                               esc_html($lineno));
3998                 print "</td>";
3999                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4000                 print "</tr>\n";
4001         }
4002         print "</table>\n";
4003         print "</div>";
4004         close $fd
4005                 or print "Reading blob failed\n";
4006         git_footer_html();
4007 }
4008
4009 sub git_blame {
4010         my $fd;
4011
4012         my ($have_blame) = gitweb_check_feature('blame');
4013         if (!$have_blame) {
4014                 die_error('403 Permission denied', "Permission denied");
4015         }
4016         die_error('404 Not Found', "File name not defined") if (!$file_name);
4017         $hash_base ||= git_get_head_hash($project);
4018         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4019         my %co = parse_commit($hash_base)
4020                 or die_error(undef, "Reading commit failed");
4021         if (!defined $hash) {
4022                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4023                         or die_error(undef, "Error lookup file");
4024         }
4025         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4026                 or die_error(undef, "Open git-annotate failed");
4027         git_header_html();
4028         my $formats_nav =
4029                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4030                         "blob") .
4031                 " | " .
4032                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4033                         "history") .
4034                 " | " .
4035                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4036                         "HEAD");
4037         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4038         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4039         git_print_page_path($file_name, 'blob', $hash_base);
4040         print "<div class=\"page_body\">\n";
4041         print <<HTML;
4042 <table class="blame">
4043   <tr>
4044     <th>Commit</th>
4045     <th>Age</th>
4046     <th>Author</th>
4047     <th>Line</th>
4048     <th>Data</th>
4049   </tr>
4050 HTML
4051         my @line_class = (qw(light dark));
4052         my $line_class_len = scalar (@line_class);
4053         my $line_class_num = $#line_class;
4054         while (my $line = <$fd>) {
4055                 my $long_rev;
4056                 my $short_rev;
4057                 my $author;
4058                 my $time;
4059                 my $lineno;
4060                 my $data;
4061                 my $age;
4062                 my $age_str;
4063                 my $age_class;
4064
4065                 chomp $line;
4066                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4067
4068                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4069                         $long_rev = $1;
4070                         $author   = $2;
4071                         $time     = $3;
4072                         $lineno   = $4;
4073                         $data     = $5;
4074                 } else {
4075                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4076                         next;
4077                 }
4078                 $short_rev  = substr ($long_rev, 0, 8);
4079                 $age        = time () - $time;
4080                 $age_str    = age_string ($age);
4081                 $age_str    =~ s/ /&nbsp;/g;
4082                 $age_class  = age_class($age);
4083                 $author     = esc_html ($author);
4084                 $author     =~ s/ /&nbsp;/g;
4085
4086                 $data = untabify($data);
4087                 $data = esc_html ($data);
4088
4089                 print <<HTML;
4090   <tr class="$line_class[$line_class_num]">
4091     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4092     <td class="$age_class">$age_str</td>
4093     <td>$author</td>
4094     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4095     <td class="pre">$data</td>
4096   </tr>
4097 HTML
4098         } # while (my $line = <$fd>)
4099         print "</table>\n\n";
4100         close $fd
4101                 or print "Reading blob failed.\n";
4102         print "</div>";
4103         git_footer_html();
4104 }
4105
4106 sub git_tags {
4107         my $head = git_get_head_hash($project);
4108         git_header_html();
4109         git_print_page_nav('','', $head,undef,$head);
4110         git_print_header_div('summary', $project);
4111
4112         my @tagslist = git_get_tags_list();
4113         if (@tagslist) {
4114                 git_tags_body(\@tagslist);
4115         }
4116         git_footer_html();
4117 }
4118
4119 sub git_heads {
4120         my $head = git_get_head_hash($project);
4121         git_header_html();
4122         git_print_page_nav('','', $head,undef,$head);
4123         git_print_header_div('summary', $project);
4124
4125         my @headslist = git_get_heads_list();
4126         if (@headslist) {
4127                 git_heads_body(\@headslist, $head);
4128         }
4129         git_footer_html();
4130 }
4131
4132 sub git_blob_plain {
4133         my $expires;
4134
4135         if (!defined $hash) {
4136                 if (defined $file_name) {
4137                         my $base = $hash_base || git_get_head_hash($project);
4138                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4139                                 or die_error(undef, "Error lookup file");
4140                 } else {
4141                         die_error(undef, "No file name defined");
4142                 }
4143         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4144                 # blobs defined by non-textual hash id's can be cached
4145                 $expires = "+1d";
4146         }
4147
4148         my $type = shift;
4149         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4150                 or die_error(undef, "Couldn't cat $file_name, $hash");
4151
4152         $type ||= blob_mimetype($fd, $file_name);
4153
4154         # save as filename, even when no $file_name is given
4155         my $save_as = "$hash";
4156         if (defined $file_name) {
4157                 $save_as = $file_name;
4158         } elsif ($type =~ m/^text\//) {
4159                 $save_as .= '.txt';
4160         }
4161
4162         print $cgi->header(
4163                 -type => "$type",
4164                 -expires=>$expires,
4165                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4166         undef $/;
4167         binmode STDOUT, ':raw';
4168         print <$fd>;
4169         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4170         $/ = "\n";
4171         close $fd;
4172 }
4173
4174 sub git_blob {
4175         my $expires;
4176
4177         if (!defined $hash) {
4178                 if (defined $file_name) {
4179                         my $base = $hash_base || git_get_head_hash($project);
4180                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4181                                 or die_error(undef, "Error lookup file");
4182                 } else {
4183                         die_error(undef, "No file name defined");
4184                 }
4185         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4186                 # blobs defined by non-textual hash id's can be cached
4187                 $expires = "+1d";
4188         }
4189
4190         my ($have_blame) = gitweb_check_feature('blame');
4191         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4192                 or die_error(undef, "Couldn't cat $file_name, $hash");
4193         my $mimetype = blob_mimetype($fd, $file_name);
4194         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4195                 close $fd;
4196                 return git_blob_plain($mimetype);
4197         }
4198         # we can have blame only for text/* mimetype
4199         $have_blame &&= ($mimetype =~ m!^text/!);
4200
4201         git_header_html(undef, $expires);
4202         my $formats_nav = '';
4203         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4204                 if (defined $file_name) {
4205                         if ($have_blame) {
4206                                 $formats_nav .=
4207                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4208                                                                hash=>$hash, file_name=>$file_name)},
4209                                                 "blame") .
4210                                         " | ";
4211                         }
4212                         $formats_nav .=
4213                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4214                                                        hash=>$hash, file_name=>$file_name)},
4215                                         "history") .
4216                                 " | " .
4217                                 $cgi->a({-href => href(action=>"blob_plain",
4218                                                        hash=>$hash, file_name=>$file_name)},
4219                                         "raw") .
4220                                 " | " .
4221                                 $cgi->a({-href => href(action=>"blob",
4222                                                        hash_base=>"HEAD", file_name=>$file_name)},
4223                                         "HEAD");
4224                 } else {
4225                         $formats_nav .=
4226                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4227                 }
4228                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4229                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4230         } else {
4231                 print "<div class=\"page_nav\">\n" .
4232                       "<br/><br/></div>\n" .
4233                       "<div class=\"title\">$hash</div>\n";
4234         }
4235         git_print_page_path($file_name, "blob", $hash_base);
4236         print "<div class=\"page_body\">\n";
4237         if ($mimetype =~ m!^text/!) {
4238                 my $nr;
4239                 while (my $line = <$fd>) {
4240                         chomp $line;
4241                         $nr++;
4242                         $line = untabify($line);
4243                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4244                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4245                 }
4246         } elsif ($mimetype =~ m!^image/!) {
4247                 print qq!<img type="$mimetype"!;
4248                 if ($file_name) {
4249                         print qq! alt="$file_name" title="$file_name"!;
4250                 }
4251                 print qq! src="! .
4252                       href(action=>"blob_plain", hash=>$hash,
4253                            hash_base=>$hash_base, file_name=>$file_name) .
4254                       qq!" />\n!;
4255         }
4256         close $fd
4257                 or print "Reading blob failed.\n";
4258         print "</div>";
4259         git_footer_html();
4260 }
4261
4262 sub git_tree {
4263         if (!defined $hash_base) {
4264                 $hash_base = "HEAD";
4265         }
4266         if (!defined $hash) {
4267                 if (defined $file_name) {
4268                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4269                 } else {
4270                         $hash = $hash_base;
4271                 }
4272         }
4273         $/ = "\0";
4274         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4275                 or die_error(undef, "Open git-ls-tree failed");
4276         my @entries = map { chomp; $_ } <$fd>;
4277         close $fd or die_error(undef, "Reading tree failed");
4278         $/ = "\n";
4279
4280         my $refs = git_get_references();
4281         my $ref = format_ref_marker($refs, $hash_base);
4282         git_header_html();
4283         my $basedir = '';
4284         my ($have_blame) = gitweb_check_feature('blame');
4285         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4286                 my @views_nav = ();
4287                 if (defined $file_name) {
4288                         push @views_nav,
4289                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4290                                                        hash=>$hash, file_name=>$file_name)},
4291                                         "history"),
4292                                 $cgi->a({-href => href(action=>"tree",
4293                                                        hash_base=>"HEAD", file_name=>$file_name)},
4294                                         "HEAD"),
4295                 }
4296                 my $snapshot_links = format_snapshot_links($hash);
4297                 if (defined $snapshot_links) {
4298                         # FIXME: Should be available when we have no hash base as well.
4299                         push @views_nav, $snapshot_links;
4300                 }
4301                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4302                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4303         } else {
4304                 undef $hash_base;
4305                 print "<div class=\"page_nav\">\n";
4306                 print "<br/><br/></div>\n";
4307                 print "<div class=\"title\">$hash</div>\n";
4308         }
4309         if (defined $file_name) {
4310                 $basedir = $file_name;
4311                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4312                         $basedir .= '/';
4313                 }
4314         }
4315         git_print_page_path($file_name, 'tree', $hash_base);
4316         print "<div class=\"page_body\">\n";
4317         print "<table cellspacing=\"0\">\n";
4318         my $alternate = 1;
4319         # '..' (top directory) link if possible
4320         if (defined $hash_base &&
4321             defined $file_name && $file_name =~ m![^/]+$!) {
4322                 if ($alternate) {
4323                         print "<tr class=\"dark\">\n";
4324                 } else {
4325                         print "<tr class=\"light\">\n";
4326                 }
4327                 $alternate ^= 1;
4328
4329                 my $up = $file_name;
4330                 $up =~ s!/?[^/]+$!!;
4331                 undef $up unless $up;
4332                 # based on git_print_tree_entry
4333                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4334                 print '<td class="list">';
4335                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4336                                              file_name=>$up)},
4337                               "..");
4338                 print "</td>\n";
4339                 print "<td class=\"link\"></td>\n";
4340
4341                 print "</tr>\n";
4342         }
4343         foreach my $line (@entries) {
4344                 my %t = parse_ls_tree_line($line, -z => 1);
4345
4346                 if ($alternate) {
4347                         print "<tr class=\"dark\">\n";
4348                 } else {
4349                         print "<tr class=\"light\">\n";
4350                 }
4351                 $alternate ^= 1;
4352
4353                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4354
4355                 print "</tr>\n";
4356         }
4357         print "</table>\n" .
4358               "</div>";
4359         git_footer_html();
4360 }
4361
4362 sub git_snapshot {
4363         my @supported_fmts = gitweb_check_feature('snapshot');
4364         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4365
4366         my $format = $cgi->param('sf');
4367         if (!@supported_fmts) {
4368                 die_error('403 Permission denied', "Permission denied");
4369         }
4370         # default to first supported snapshot format
4371         $format ||= $supported_fmts[0];
4372         if ($format !~ m/^[a-z0-9]+$/) {
4373                 die_error(undef, "Invalid snapshot format parameter");
4374         } elsif (!exists($known_snapshot_formats{$format})) {
4375                 die_error(undef, "Unknown snapshot format");
4376         } elsif (!grep($_ eq $format, @supported_fmts)) {
4377                 die_error(undef, "Unsupported snapshot format");
4378         }
4379
4380         if (!defined $hash) {
4381                 $hash = git_get_head_hash($project);
4382         }
4383
4384         my $git_command = git_cmd_str();
4385         my $name = $project;
4386         $name =~ s,([^/])/*\.git$,$1,;
4387         $name = basename($name);
4388         my $filename = to_utf8($name);
4389         $name =~ s/\047/\047\\\047\047/g;
4390         my $cmd;
4391         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4392         $cmd = "$git_command archive " .
4393                 "--format=$known_snapshot_formats{$format}{'format'} " .
4394                 "--prefix=\'$name\'/ $hash";
4395         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4396                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4397         }
4398
4399         print $cgi->header(
4400                 -type => $known_snapshot_formats{$format}{'type'},
4401                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4402                 -status => '200 OK');
4403
4404         open my $fd, "-|", $cmd
4405                 or die_error(undef, "Execute git-archive failed");
4406         binmode STDOUT, ':raw';
4407         print <$fd>;
4408         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4409         close $fd;
4410 }
4411
4412 sub git_log {
4413         my $head = git_get_head_hash($project);
4414         if (!defined $hash) {
4415                 $hash = $head;
4416         }
4417         if (!defined $page) {
4418                 $page = 0;
4419         }
4420         my $refs = git_get_references();
4421
4422         my @commitlist = parse_commits($hash, 101, (100 * $page));
4423
4424         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4425
4426         git_header_html();
4427         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4428
4429         if (!@commitlist) {
4430                 my %co = parse_commit($hash);
4431
4432                 git_print_header_div('summary', $project);
4433                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4434         }
4435         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4436         for (my $i = 0; $i <= $to; $i++) {
4437                 my %co = %{$commitlist[$i]};
4438                 next if !%co;
4439                 my $commit = $co{'id'};
4440                 my $ref = format_ref_marker($refs, $commit);
4441                 my %ad = parse_date($co{'author_epoch'});
4442                 git_print_header_div('commit',
4443                                "<span class=\"age\">$co{'age_string'}</span>" .
4444                                esc_html($co{'title'}) . $ref,
4445                                $commit);
4446                 print "<div class=\"title_text\">\n" .
4447                       "<div class=\"log_link\">\n" .
4448                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4449                       " | " .
4450                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4451                       " | " .
4452                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4453                       "<br/>\n" .
4454                       "</div>\n" .
4455                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4456                       "</div>\n";
4457
4458                 print "<div class=\"log_body\">\n";
4459                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4460                 print "</div>\n";
4461         }
4462         if ($#commitlist >= 100) {
4463                 print "<div class=\"page_nav\">\n";
4464                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4465                                -accesskey => "n", -title => "Alt-n"}, "next");
4466                 print "</div>\n";
4467         }
4468         git_footer_html();
4469 }
4470
4471 sub git_commit {
4472         $hash ||= $hash_base || "HEAD";
4473         my %co = parse_commit($hash);
4474         if (!%co) {
4475                 die_error(undef, "Unknown commit object");
4476         }
4477         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4478         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4479
4480         my $parent  = $co{'parent'};
4481         my $parents = $co{'parents'}; # listref
4482
4483         # we need to prepare $formats_nav before any parameter munging
4484         my $formats_nav;
4485         if (!defined $parent) {
4486                 # --root commitdiff
4487                 $formats_nav .= '(initial)';
4488         } elsif (@$parents == 1) {
4489                 # single parent commit
4490                 $formats_nav .=
4491                         '(parent: ' .
4492                         $cgi->a({-href => href(action=>"commit",
4493                                                hash=>$parent)},
4494                                 esc_html(substr($parent, 0, 7))) .
4495                         ')';
4496         } else {
4497                 # merge commit
4498                 $formats_nav .=
4499                         '(merge: ' .
4500                         join(' ', map {
4501                                 $cgi->a({-href => href(action=>"commit",
4502                                                        hash=>$_)},
4503                                         esc_html(substr($_, 0, 7)));
4504                         } @$parents ) .
4505                         ')';
4506         }
4507
4508         if (!defined $parent) {
4509                 $parent = "--root";
4510         }
4511         my @difftree;
4512         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4513                 @diff_opts,
4514                 (@$parents <= 1 ? $parent : '-c'),
4515                 $hash, "--"
4516                 or die_error(undef, "Open git-diff-tree failed");
4517         @difftree = map { chomp; $_ } <$fd>;
4518         close $fd or die_error(undef, "Reading git-diff-tree failed");
4519
4520         # non-textual hash id's can be cached
4521         my $expires;
4522         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4523                 $expires = "+1d";
4524         }
4525         my $refs = git_get_references();
4526         my $ref = format_ref_marker($refs, $co{'id'});
4527
4528         git_header_html(undef, $expires);
4529         git_print_page_nav('commit', '',
4530                            $hash, $co{'tree'}, $hash,
4531                            $formats_nav);
4532
4533         if (defined $co{'parent'}) {
4534                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4535         } else {
4536                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4537         }
4538         print "<div class=\"title_text\">\n" .
4539               "<table cellspacing=\"0\">\n";
4540         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4541               "<tr>" .
4542               "<td></td><td> $ad{'rfc2822'}";
4543         if ($ad{'hour_local'} < 6) {
4544                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4545                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4546         } else {
4547                 printf(" (%02d:%02d %s)",
4548                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4549         }
4550         print "</td>" .
4551               "</tr>\n";
4552         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4553         print "<tr><td></td><td> $cd{'rfc2822'}" .
4554               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4555               "</td></tr>\n";
4556         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4557         print "<tr>" .
4558               "<td>tree</td>" .
4559               "<td class=\"sha1\">" .
4560               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4561                        class => "list"}, $co{'tree'}) .
4562               "</td>" .
4563               "<td class=\"link\">" .
4564               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4565                       "tree");
4566         my $snapshot_links = format_snapshot_links($hash);
4567         if (defined $snapshot_links) {
4568                 print " | " . $snapshot_links;
4569         }
4570         print "</td>" .
4571               "</tr>\n";
4572
4573         foreach my $par (@$parents) {
4574                 print "<tr>" .
4575                       "<td>parent</td>" .
4576                       "<td class=\"sha1\">" .
4577                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4578                                class => "list"}, $par) .
4579                       "</td>" .
4580                       "<td class=\"link\">" .
4581                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4582                       " | " .
4583                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4584                       "</td>" .
4585                       "</tr>\n";
4586         }
4587         print "</table>".
4588               "</div>\n";
4589
4590         print "<div class=\"page_body\">\n";
4591         git_print_log($co{'comment'});
4592         print "</div>\n";
4593
4594         git_difftree_body(\@difftree, $hash, @$parents);
4595
4596         git_footer_html();
4597 }
4598
4599 sub git_object {
4600         # object is defined by:
4601         # - hash or hash_base alone
4602         # - hash_base and file_name
4603         my $type;
4604
4605         # - hash or hash_base alone
4606         if ($hash || ($hash_base && !defined $file_name)) {
4607                 my $object_id = $hash || $hash_base;
4608
4609                 my $git_command = git_cmd_str();
4610                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4611                         or die_error('404 Not Found', "Object does not exist");
4612                 $type = <$fd>;
4613                 chomp $type;
4614                 close $fd
4615                         or die_error('404 Not Found', "Object does not exist");
4616
4617         # - hash_base and file_name
4618         } elsif ($hash_base && defined $file_name) {
4619                 $file_name =~ s,/+$,,;
4620
4621                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4622                         or die_error('404 Not Found', "Base object does not exist");
4623
4624                 # here errors should not hapen
4625                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4626                         or die_error(undef, "Open git-ls-tree failed");
4627                 my $line = <$fd>;
4628                 close $fd;
4629
4630                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4631                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4632                         die_error('404 Not Found', "File or directory for given base does not exist");
4633                 }
4634                 $type = $2;
4635                 $hash = $3;
4636         } else {
4637                 die_error('404 Not Found', "Not enough information to find object");
4638         }
4639
4640         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4641                                           hash=>$hash, hash_base=>$hash_base,
4642                                           file_name=>$file_name),
4643                              -status => '302 Found');
4644 }
4645
4646 sub git_blobdiff {
4647         my $format = shift || 'html';
4648
4649         my $fd;
4650         my @difftree;
4651         my %diffinfo;
4652         my $expires;
4653
4654         # preparing $fd and %diffinfo for git_patchset_body
4655         # new style URI
4656         if (defined $hash_base && defined $hash_parent_base) {
4657                 if (defined $file_name) {
4658                         # read raw output
4659                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4660                                 $hash_parent_base, $hash_base,
4661                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4662                                 or die_error(undef, "Open git-diff-tree failed");
4663                         @difftree = map { chomp; $_ } <$fd>;
4664                         close $fd
4665                                 or die_error(undef, "Reading git-diff-tree failed");
4666                         @difftree
4667                                 or die_error('404 Not Found', "Blob diff not found");
4668
4669                 } elsif (defined $hash &&
4670                          $hash =~ /[0-9a-fA-F]{40}/) {
4671                         # try to find filename from $hash
4672
4673                         # read filtered raw output
4674                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4675                                 $hash_parent_base, $hash_base, "--"
4676                                 or die_error(undef, "Open git-diff-tree failed");
4677                         @difftree =
4678                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4679                                 # $hash == to_id
4680                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4681                                 map { chomp; $_ } <$fd>;
4682                         close $fd
4683                                 or die_error(undef, "Reading git-diff-tree failed");
4684                         @difftree
4685                                 or die_error('404 Not Found', "Blob diff not found");
4686
4687                 } else {
4688                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4689                 }
4690
4691                 if (@difftree > 1) {
4692                         die_error('404 Not Found', "Ambiguous blob diff specification");
4693                 }
4694
4695                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4696                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4697                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4698
4699                 $hash_parent ||= $diffinfo{'from_id'};
4700                 $hash        ||= $diffinfo{'to_id'};
4701
4702                 # non-textual hash id's can be cached
4703                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4704                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4705                         $expires = '+1d';
4706                 }
4707
4708                 # open patch output
4709                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4710                         '-p', ($format eq 'html' ? "--full-index" : ()),
4711                         $hash_parent_base, $hash_base,
4712                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4713                         or die_error(undef, "Open git-diff-tree failed");
4714         }
4715
4716         # old/legacy style URI
4717         if (!%diffinfo && # if new style URI failed
4718             defined $hash && defined $hash_parent) {
4719                 # fake git-diff-tree raw output
4720                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4721                 $diffinfo{'from_id'} = $hash_parent;
4722                 $diffinfo{'to_id'}   = $hash;
4723                 if (defined $file_name) {
4724                         if (defined $file_parent) {
4725                                 $diffinfo{'status'} = '2';
4726                                 $diffinfo{'from_file'} = $file_parent;
4727                                 $diffinfo{'to_file'}   = $file_name;
4728                         } else { # assume not renamed
4729                                 $diffinfo{'status'} = '1';
4730                                 $diffinfo{'from_file'} = $file_name;
4731                                 $diffinfo{'to_file'}   = $file_name;
4732                         }
4733                 } else { # no filename given
4734                         $diffinfo{'status'} = '2';
4735                         $diffinfo{'from_file'} = $hash_parent;
4736                         $diffinfo{'to_file'}   = $hash;
4737                 }
4738
4739                 # non-textual hash id's can be cached
4740                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4741                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4742                         $expires = '+1d';
4743                 }
4744
4745                 # open patch output
4746                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4747                         '-p', ($format eq 'html' ? "--full-index" : ()),
4748                         $hash_parent, $hash, "--"
4749                         or die_error(undef, "Open git-diff failed");
4750         } else  {
4751                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4752                         unless %diffinfo;
4753         }
4754
4755         # header
4756         if ($format eq 'html') {
4757                 my $formats_nav =
4758                         $cgi->a({-href => href(action=>"blobdiff_plain",
4759                                                hash=>$hash, hash_parent=>$hash_parent,
4760                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4761                                                file_name=>$file_name, file_parent=>$file_parent)},
4762                                 "raw");
4763                 git_header_html(undef, $expires);
4764                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4765                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4766                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4767                 } else {
4768                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4769                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4770                 }
4771                 if (defined $file_name) {
4772                         git_print_page_path($file_name, "blob", $hash_base);
4773                 } else {
4774                         print "<div class=\"page_path\"></div>\n";
4775                 }
4776
4777         } elsif ($format eq 'plain') {
4778                 print $cgi->header(
4779                         -type => 'text/plain',
4780                         -charset => 'utf-8',
4781                         -expires => $expires,
4782                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4783
4784                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4785
4786         } else {
4787                 die_error(undef, "Unknown blobdiff format");
4788         }
4789
4790         # patch
4791         if ($format eq 'html') {
4792                 print "<div class=\"page_body\">\n";
4793
4794                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4795                 close $fd;
4796
4797                 print "</div>\n"; # class="page_body"
4798                 git_footer_html();
4799
4800         } else {
4801                 while (my $line = <$fd>) {
4802                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4803                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4804
4805                         print $line;
4806
4807                         last if $line =~ m!^\+\+\+!;
4808                 }
4809                 local $/ = undef;
4810                 print <$fd>;
4811                 close $fd;
4812         }
4813 }
4814
4815 sub git_blobdiff_plain {
4816         git_blobdiff('plain');
4817 }
4818
4819 sub git_commitdiff {
4820         my $format = shift || 'html';
4821         $hash ||= $hash_base || "HEAD";
4822         my %co = parse_commit($hash);
4823         if (!%co) {
4824                 die_error(undef, "Unknown commit object");
4825         }
4826
4827         # choose format for commitdiff for merge
4828         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4829                 $hash_parent = '--cc';
4830         }
4831         # we need to prepare $formats_nav before almost any parameter munging
4832         my $formats_nav;
4833         if ($format eq 'html') {
4834                 $formats_nav =
4835                         $cgi->a({-href => href(action=>"commitdiff_plain",
4836                                                hash=>$hash, hash_parent=>$hash_parent)},
4837                                 "raw");
4838
4839                 if (defined $hash_parent &&
4840                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4841                         # commitdiff with two commits given
4842                         my $hash_parent_short = $hash_parent;
4843                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4844                                 $hash_parent_short = substr($hash_parent, 0, 7);
4845                         }
4846                         $formats_nav .=
4847                                 ' (from';
4848                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4849                                 if ($co{'parents'}[$i] eq $hash_parent) {
4850                                         $formats_nav .= ' parent ' . ($i+1);
4851                                         last;
4852                                 }
4853                         }
4854                         $formats_nav .= ': ' .
4855                                 $cgi->a({-href => href(action=>"commitdiff",
4856                                                        hash=>$hash_parent)},
4857                                         esc_html($hash_parent_short)) .
4858                                 ')';
4859                 } elsif (!$co{'parent'}) {
4860                         # --root commitdiff
4861                         $formats_nav .= ' (initial)';
4862                 } elsif (scalar @{$co{'parents'}} == 1) {
4863                         # single parent commit
4864                         $formats_nav .=
4865                                 ' (parent: ' .
4866                                 $cgi->a({-href => href(action=>"commitdiff",
4867                                                        hash=>$co{'parent'})},
4868                                         esc_html(substr($co{'parent'}, 0, 7))) .
4869                                 ')';
4870                 } else {
4871                         # merge commit
4872                         if ($hash_parent eq '--cc') {
4873                                 $formats_nav .= ' | ' .
4874                                         $cgi->a({-href => href(action=>"commitdiff",
4875                                                                hash=>$hash, hash_parent=>'-c')},
4876                                                 'combined');
4877                         } else { # $hash_parent eq '-c'
4878                                 $formats_nav .= ' | ' .
4879                                         $cgi->a({-href => href(action=>"commitdiff",
4880                                                                hash=>$hash, hash_parent=>'--cc')},
4881                                                 'compact');
4882                         }
4883                         $formats_nav .=
4884                                 ' (merge: ' .
4885                                 join(' ', map {
4886                                         $cgi->a({-href => href(action=>"commitdiff",
4887                                                                hash=>$_)},
4888                                                 esc_html(substr($_, 0, 7)));
4889                                 } @{$co{'parents'}} ) .
4890                                 ')';
4891                 }
4892         }
4893
4894         my $hash_parent_param = $hash_parent;
4895         if (!defined $hash_parent_param) {
4896                 # --cc for multiple parents, --root for parentless
4897                 $hash_parent_param =
4898                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4899         }
4900
4901         # read commitdiff
4902         my $fd;
4903         my @difftree;
4904         if ($format eq 'html') {
4905                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4906                         "--no-commit-id", "--patch-with-raw", "--full-index",
4907                         $hash_parent_param, $hash, "--"
4908                         or die_error(undef, "Open git-diff-tree failed");
4909
4910                 while (my $line = <$fd>) {
4911                         chomp $line;
4912                         # empty line ends raw part of diff-tree output
4913                         last unless $line;
4914                         push @difftree, scalar parse_difftree_raw_line($line);
4915                 }
4916
4917         } elsif ($format eq 'plain') {
4918                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4919                         '-p', $hash_parent_param, $hash, "--"
4920                         or die_error(undef, "Open git-diff-tree failed");
4921
4922         } else {
4923                 die_error(undef, "Unknown commitdiff format");
4924         }
4925
4926         # non-textual hash id's can be cached
4927         my $expires;
4928         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4929                 $expires = "+1d";
4930         }
4931
4932         # write commit message
4933         if ($format eq 'html') {
4934                 my $refs = git_get_references();
4935                 my $ref = format_ref_marker($refs, $co{'id'});
4936
4937                 git_header_html(undef, $expires);
4938                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4939                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4940                 git_print_authorship(\%co);
4941                 print "<div class=\"page_body\">\n";
4942                 if (@{$co{'comment'}} > 1) {
4943                         print "<div class=\"log\">\n";
4944                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4945                         print "</div>\n"; # class="log"
4946                 }
4947
4948         } elsif ($format eq 'plain') {
4949                 my $refs = git_get_references("tags");
4950                 my $tagname = git_get_rev_name_tags($hash);
4951                 my $filename = basename($project) . "-$hash.patch";
4952
4953                 print $cgi->header(
4954                         -type => 'text/plain',
4955                         -charset => 'utf-8',
4956                         -expires => $expires,
4957                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4958                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4959                 print <<TEXT;
4960 From: $co{'author'}
4961 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4962 Subject: $co{'title'}
4963 TEXT
4964                 print "X-Git-Tag: $tagname\n" if $tagname;
4965                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4966
4967                 foreach my $line (@{$co{'comment'}}) {
4968                         print "$line\n";
4969                 }
4970                 print "---\n\n";
4971         }
4972
4973         # write patch
4974         if ($format eq 'html') {
4975                 my $use_parents = !defined $hash_parent ||
4976                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4977                 git_difftree_body(\@difftree, $hash,
4978                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4979                 print "<br/>\n";
4980
4981                 git_patchset_body($fd, \@difftree, $hash,
4982                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4983                 close $fd;
4984                 print "</div>\n"; # class="page_body"
4985                 git_footer_html();
4986
4987         } elsif ($format eq 'plain') {
4988                 local $/ = undef;
4989                 print <$fd>;
4990                 close $fd
4991                         or print "Reading git-diff-tree failed\n";
4992         }
4993 }
4994
4995 sub git_commitdiff_plain {
4996         git_commitdiff('plain');
4997 }
4998
4999 sub git_history {
5000         if (!defined $hash_base) {
5001                 $hash_base = git_get_head_hash($project);
5002         }
5003         if (!defined $page) {
5004                 $page = 0;
5005         }
5006         my $ftype;
5007         my %co = parse_commit($hash_base);
5008         if (!%co) {
5009                 die_error(undef, "Unknown commit object");
5010         }
5011
5012         my $refs = git_get_references();
5013         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5014
5015         if (!defined $hash && defined $file_name) {
5016                 $hash = git_get_hash_by_path($hash_base, $file_name);
5017         }
5018         if (defined $hash) {
5019                 $ftype = git_get_type($hash);
5020         }
5021
5022         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5023
5024         my $paging_nav = '';
5025         if ($page > 0) {
5026                 $paging_nav .=
5027                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5028                                                file_name=>$file_name)},
5029                                 "first");
5030                 $paging_nav .= " &sdot; " .
5031                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5032                                                file_name=>$file_name, page=>$page-1),
5033                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5034         } else {
5035                 $paging_nav .= "first";
5036                 $paging_nav .= " &sdot; prev";
5037         }
5038         if ($#commitlist >= 100) {
5039                 $paging_nav .= " &sdot; " .
5040                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5041                                                file_name=>$file_name, page=>$page+1),
5042                                  -accesskey => "n", -title => "Alt-n"}, "next");
5043         } else {
5044                 $paging_nav .= " &sdot; next";
5045         }
5046         my $next_link = '';
5047         if ($#commitlist >= 100) {
5048                 $next_link =
5049                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5050                                                file_name=>$file_name, page=>$page+1),
5051                                  -accesskey => "n", -title => "Alt-n"}, "next");
5052         }
5053
5054         git_header_html();
5055         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5056         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5057         git_print_page_path($file_name, $ftype, $hash_base);
5058
5059         git_history_body(\@commitlist, 0, 99,
5060                          $refs, $hash_base, $ftype, $next_link);
5061
5062         git_footer_html();
5063 }
5064
5065 sub git_search {
5066         my ($have_search) = gitweb_check_feature('search');
5067         if (!$have_search) {
5068                 die_error('403 Permission denied', "Permission denied");
5069         }
5070         if (!defined $searchtext) {
5071                 die_error(undef, "Text field empty");
5072         }
5073         if (!defined $hash) {
5074                 $hash = git_get_head_hash($project);
5075         }
5076         my %co = parse_commit($hash);
5077         if (!%co) {
5078                 die_error(undef, "Unknown commit object");
5079         }
5080         if (!defined $page) {
5081                 $page = 0;
5082         }
5083
5084         $searchtype ||= 'commit';
5085         if ($searchtype eq 'pickaxe') {
5086                 # pickaxe may take all resources of your box and run for several minutes
5087                 # with every query - so decide by yourself how public you make this feature
5088                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5089                 if (!$have_pickaxe) {
5090                         die_error('403 Permission denied', "Permission denied");
5091                 }
5092         }
5093         if ($searchtype eq 'grep') {
5094                 my ($have_grep) = gitweb_check_feature('grep');
5095                 if (!$have_grep) {
5096                         die_error('403 Permission denied', "Permission denied");
5097                 }
5098         }
5099
5100         git_header_html();
5101
5102         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5103                 my $greptype;
5104                 if ($searchtype eq 'commit') {
5105                         $greptype = "--grep=";
5106                 } elsif ($searchtype eq 'author') {
5107                         $greptype = "--author=";
5108                 } elsif ($searchtype eq 'committer') {
5109                         $greptype = "--committer=";
5110                 }
5111                 $greptype .= $search_regexp;
5112                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5113
5114                 my $paging_nav = '';
5115                 if ($page > 0) {
5116                         $paging_nav .=
5117                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5118                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5119                                         "first");
5120                         $paging_nav .= " &sdot; " .
5121                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5122                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5123                                                        page=>$page-1),
5124                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5125                 } else {
5126                         $paging_nav .= "first";
5127                         $paging_nav .= " &sdot; prev";
5128                 }
5129                 if ($#commitlist >= 100) {
5130                         $paging_nav .= " &sdot; " .
5131                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5132                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5133                                                        page=>$page+1),
5134                                          -accesskey => "n", -title => "Alt-n"}, "next");
5135                 } else {
5136                         $paging_nav .= " &sdot; next";
5137                 }
5138                 my $next_link = '';
5139                 if ($#commitlist >= 100) {
5140                         $next_link =
5141                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5142                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5143                                                        page=>$page+1),
5144                                          -accesskey => "n", -title => "Alt-n"}, "next");
5145                 }
5146
5147                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5148                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5149                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5150         }
5151
5152         if ($searchtype eq 'pickaxe') {
5153                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5154                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5155
5156                 print "<table cellspacing=\"0\">\n";
5157                 my $alternate = 1;
5158                 $/ = "\n";
5159                 my $git_command = git_cmd_str();
5160                 my $searchqtext = $searchtext;
5161                 $searchqtext =~ s/'/'\\''/;
5162                 open my $fd, "-|", "$git_command rev-list $hash | " .
5163                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5164                 undef %co;
5165                 my @files;
5166                 while (my $line = <$fd>) {
5167                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5168                                 my %set;
5169                                 $set{'file'} = $6;
5170                                 $set{'from_id'} = $3;
5171                                 $set{'to_id'} = $4;
5172                                 $set{'id'} = $set{'to_id'};
5173                                 if ($set{'id'} =~ m/0{40}/) {
5174                                         $set{'id'} = $set{'from_id'};
5175                                 }
5176                                 if ($set{'id'} =~ m/0{40}/) {
5177                                         next;
5178                                 }
5179                                 push @files, \%set;
5180                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5181                                 if (%co) {
5182                                         if ($alternate) {
5183                                                 print "<tr class=\"dark\">\n";
5184                                         } else {
5185                                                 print "<tr class=\"light\">\n";
5186                                         }
5187                                         $alternate ^= 1;
5188                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5189                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5190                                               "<td>" .
5191                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5192                                                       -class => "list subject"},
5193                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5194                                         while (my $setref = shift @files) {
5195                                                 my %set = %$setref;
5196                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5197                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5198                                                               -class => "list"},
5199                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5200                                                       "<br/>\n";
5201                                         }
5202                                         print "</td>\n" .
5203                                               "<td class=\"link\">" .
5204                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5205                                               " | " .
5206                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5207                                         print "</td>\n" .
5208                                               "</tr>\n";
5209                                 }
5210                                 %co = parse_commit($1);
5211                         }
5212                 }
5213                 close $fd;
5214
5215                 print "</table>\n";
5216         }
5217
5218         if ($searchtype eq 'grep') {
5219                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5220                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5221
5222                 print "<table cellspacing=\"0\">\n";
5223                 my $alternate = 1;
5224                 my $matches = 0;
5225                 $/ = "\n";
5226                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5227                 my $lastfile = '';
5228                 while (my $line = <$fd>) {
5229                         chomp $line;
5230                         my ($file, $lno, $ltext, $binary);
5231                         last if ($matches++ > 1000);
5232                         if ($line =~ /^Binary file (.+) matches$/) {
5233                                 $file = $1;
5234                                 $binary = 1;
5235                         } else {
5236                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5237                         }
5238                         if ($file ne $lastfile) {
5239                                 $lastfile and print "</td></tr>\n";
5240                                 if ($alternate++) {
5241                                         print "<tr class=\"dark\">\n";
5242                                 } else {
5243                                         print "<tr class=\"light\">\n";
5244                                 }
5245                                 print "<td class=\"list\">".
5246                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5247                                                                file_name=>"$file"),
5248                                                 -class => "list"}, esc_path($file));
5249                                 print "</td><td>\n";
5250                                 $lastfile = $file;
5251                         }
5252                         if ($binary) {
5253                                 print "<div class=\"binary\">Binary file</div>\n";
5254                         } else {
5255                                 $ltext = untabify($ltext);
5256                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5257                                         $ltext = esc_html($1, -nbsp=>1);
5258                                         $ltext .= '<span class="match">';
5259                                         $ltext .= esc_html($2, -nbsp=>1);
5260                                         $ltext .= '</span>';
5261                                         $ltext .= esc_html($3, -nbsp=>1);
5262                                 } else {
5263                                         $ltext = esc_html($ltext, -nbsp=>1);
5264                                 }
5265                                 print "<div class=\"pre\">" .
5266                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5267                                                                file_name=>"$file").'#l'.$lno,
5268                                                 -class => "linenr"}, sprintf('%4i', $lno))
5269                                         . ' ' .  $ltext . "</div>\n";
5270                         }
5271                 }
5272                 if ($lastfile) {
5273                         print "</td></tr>\n";
5274                         if ($matches > 1000) {
5275                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5276                         }
5277                 } else {
5278                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5279                 }
5280                 close $fd;
5281
5282                 print "</table>\n";
5283         }
5284         git_footer_html();
5285 }
5286
5287 sub git_search_help {
5288         git_header_html();
5289         git_print_page_nav('','', $hash,$hash,$hash);
5290         print <<EOT;
5291 <dl>
5292 <dt><b>commit</b></dt>
5293 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5294 EOT
5295         my ($have_grep) = gitweb_check_feature('grep');
5296         if ($have_grep) {
5297                 print <<EOT;
5298 <dt><b>grep</b></dt>
5299 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5300     a different one) are searched for the given
5301 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5302 (POSIX extended) and the matches are listed. On large
5303 trees, this search can take a while and put some strain on the server, so please use it with
5304 some consideration.</dd>
5305 EOT
5306         }
5307         print <<EOT;
5308 <dt><b>author</b></dt>
5309 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5310 <dt><b>committer</b></dt>
5311 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5312 EOT
5313         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5314         if ($have_pickaxe) {
5315                 print <<EOT;
5316 <dt><b>pickaxe</b></dt>
5317 <dd>All commits that caused the string to appear or disappear from any file (changes that
5318 added, removed or "modified" the string) will be listed. This search can take a while and
5319 takes a lot of strain on the server, so please use it wisely.</dd>
5320 EOT
5321         }
5322         print "</dl>\n";
5323         git_footer_html();
5324 }
5325
5326 sub git_shortlog {
5327         my $head = git_get_head_hash($project);
5328         if (!defined $hash) {
5329                 $hash = $head;
5330         }
5331         if (!defined $page) {
5332                 $page = 0;
5333         }
5334         my $refs = git_get_references();
5335
5336         my @commitlist = parse_commits($hash, 101, (100 * $page));
5337
5338         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5339         my $next_link = '';
5340         if ($#commitlist >= 100) {
5341                 $next_link =
5342                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5343                                  -accesskey => "n", -title => "Alt-n"}, "next");
5344         }
5345
5346         git_header_html();
5347         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5348         git_print_header_div('summary', $project);
5349
5350         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5351
5352         git_footer_html();
5353 }
5354
5355 ## ......................................................................
5356 ## feeds (RSS, Atom; OPML)
5357
5358 sub git_feed {
5359         my $format = shift || 'atom';
5360         my ($have_blame) = gitweb_check_feature('blame');
5361
5362         # Atom: http://www.atomenabled.org/developers/syndication/
5363         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5364         if ($format ne 'rss' && $format ne 'atom') {
5365                 die_error(undef, "Unknown web feed format");
5366         }
5367
5368         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5369         my $head = $hash || 'HEAD';
5370         my @commitlist = parse_commits($head, 150);
5371
5372         my %latest_commit;
5373         my %latest_date;
5374         my $content_type = "application/$format+xml";
5375         if (defined $cgi->http('HTTP_ACCEPT') &&
5376                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5377                 # browser (feed reader) prefers text/xml
5378                 $content_type = 'text/xml';
5379         }
5380         if (defined($commitlist[0])) {
5381                 %latest_commit = %{$commitlist[0]};
5382                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5383                 print $cgi->header(
5384                         -type => $content_type,
5385                         -charset => 'utf-8',
5386                         -last_modified => $latest_date{'rfc2822'});
5387         } else {
5388                 print $cgi->header(
5389                         -type => $content_type,
5390                         -charset => 'utf-8');
5391         }
5392
5393         # Optimization: skip generating the body if client asks only
5394         # for Last-Modified date.
5395         return if ($cgi->request_method() eq 'HEAD');
5396
5397         # header variables
5398         my $title = "$site_name - $project/$action";
5399         my $feed_type = 'log';
5400         if (defined $hash) {
5401                 $title .= " - '$hash'";
5402                 $feed_type = 'branch log';
5403                 if (defined $file_name) {
5404                         $title .= " :: $file_name";
5405                         $feed_type = 'history';
5406                 }
5407         } elsif (defined $file_name) {
5408                 $title .= " - $file_name";
5409                 $feed_type = 'history';
5410         }
5411         $title .= " $feed_type";
5412         my $descr = git_get_project_description($project);
5413         if (defined $descr) {
5414                 $descr = esc_html($descr);
5415         } else {
5416                 $descr = "$project " .
5417                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5418                          " feed";
5419         }
5420         my $owner = git_get_project_owner($project);
5421         $owner = esc_html($owner);
5422
5423         #header
5424         my $alt_url;
5425         if (defined $file_name) {
5426                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5427         } elsif (defined $hash) {
5428                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5429         } else {
5430                 $alt_url = href(-full=>1, action=>"summary");
5431         }
5432         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5433         if ($format eq 'rss') {
5434                 print <<XML;
5435 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5436 <channel>
5437 XML
5438                 print "<title>$title</title>\n" .
5439                       "<link>$alt_url</link>\n" .
5440                       "<description>$descr</description>\n" .
5441                       "<language>en</language>\n";
5442         } elsif ($format eq 'atom') {
5443                 print <<XML;
5444 <feed xmlns="http://www.w3.org/2005/Atom">
5445 XML
5446                 print "<title>$title</title>\n" .
5447                       "<subtitle>$descr</subtitle>\n" .
5448                       '<link rel="alternate" type="text/html" href="' .
5449                       $alt_url . '" />' . "\n" .
5450                       '<link rel="self" type="' . $content_type . '" href="' .
5451                       $cgi->self_url() . '" />' . "\n" .
5452                       "<id>" . href(-full=>1) . "</id>\n" .
5453                       # use project owner for feed author
5454                       "<author><name>$owner</name></author>\n";
5455                 if (defined $favicon) {
5456                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5457                 }
5458                 if (defined $logo_url) {
5459                         # not twice as wide as tall: 72 x 27 pixels
5460                         print "<logo>" . esc_url($logo) . "</logo>\n";
5461                 }
5462                 if (! %latest_date) {
5463                         # dummy date to keep the feed valid until commits trickle in:
5464                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5465                 } else {
5466                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5467                 }
5468         }
5469
5470         # contents
5471         for (my $i = 0; $i <= $#commitlist; $i++) {
5472                 my %co = %{$commitlist[$i]};
5473                 my $commit = $co{'id'};
5474                 # we read 150, we always show 30 and the ones more recent than 48 hours
5475                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5476                         last;
5477                 }
5478                 my %cd = parse_date($co{'author_epoch'});
5479
5480                 # get list of changed files
5481                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5482                         $co{'parent'} || "--root",
5483                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5484                         or next;
5485                 my @difftree = map { chomp; $_ } <$fd>;
5486                 close $fd
5487                         or next;
5488
5489                 # print element (entry, item)
5490                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5491                 if ($format eq 'rss') {
5492                         print "<item>\n" .
5493                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5494                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5495                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5496                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5497                               "<link>$co_url</link>\n" .
5498                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5499                               "<content:encoded>" .
5500                               "<![CDATA[\n";
5501                 } elsif ($format eq 'atom') {
5502                         print "<entry>\n" .
5503                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5504                               "<updated>$cd{'iso-8601'}</updated>\n" .
5505                               "<author>\n" .
5506                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5507                         if ($co{'author_email'}) {
5508                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5509                         }
5510                         print "</author>\n" .
5511                               # use committer for contributor
5512                               "<contributor>\n" .
5513                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5514                         if ($co{'committer_email'}) {
5515                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5516                         }
5517                         print "</contributor>\n" .
5518                               "<published>$cd{'iso-8601'}</published>\n" .
5519                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5520                               "<id>$co_url</id>\n" .
5521                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5522                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5523                 }
5524                 my $comment = $co{'comment'};
5525                 print "<pre>\n";
5526                 foreach my $line (@$comment) {
5527                         $line = esc_html($line);
5528                         print "$line\n";
5529                 }
5530                 print "</pre><ul>\n";
5531                 foreach my $difftree_line (@difftree) {
5532                         my %difftree = parse_difftree_raw_line($difftree_line);
5533                         next if !$difftree{'from_id'};
5534
5535                         my $file = $difftree{'file'} || $difftree{'to_file'};
5536
5537                         print "<li>" .
5538                               "[" .
5539                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5540                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5541                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5542                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5543                                       -title => "diff"}, 'D');
5544                         if ($have_blame) {
5545                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5546                                                              file_name=>$file, hash_base=>$commit),
5547                                               -title => "blame"}, 'B');
5548                         }
5549                         # if this is not a feed of a file history
5550                         if (!defined $file_name || $file_name ne $file) {
5551                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5552                                                              file_name=>$file, hash=>$commit),
5553                                               -title => "history"}, 'H');
5554                         }
5555                         $file = esc_path($file);
5556                         print "] ".
5557                               "$file</li>\n";
5558                 }
5559                 if ($format eq 'rss') {
5560                         print "</ul>]]>\n" .
5561                               "</content:encoded>\n" .
5562                               "</item>\n";
5563                 } elsif ($format eq 'atom') {
5564                         print "</ul>\n</div>\n" .
5565                               "</content>\n" .
5566                               "</entry>\n";
5567                 }
5568         }
5569
5570         # end of feed
5571         if ($format eq 'rss') {
5572                 print "</channel>\n</rss>\n";
5573         }       elsif ($format eq 'atom') {
5574                 print "</feed>\n";
5575         }
5576 }
5577
5578 sub git_rss {
5579         git_feed('rss');
5580 }
5581
5582 sub git_atom {
5583         git_feed('atom');
5584 }
5585
5586 sub git_opml {
5587         my @list = git_get_projects_list();
5588
5589         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5590         print <<XML;
5591 <?xml version="1.0" encoding="utf-8"?>
5592 <opml version="1.0">
5593 <head>
5594   <title>$site_name OPML Export</title>
5595 </head>
5596 <body>
5597 <outline text="git RSS feeds">
5598 XML
5599
5600         foreach my $pr (@list) {
5601                 my %proj = %$pr;
5602                 my $head = git_get_head_hash($proj{'path'});
5603                 if (!defined $head) {
5604                         next;
5605                 }
5606                 $git_dir = "$projectroot/$proj{'path'}";
5607                 my %co = parse_commit($head);
5608                 if (!%co) {
5609                         next;
5610                 }
5611
5612                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5613                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5614                 my $html = "$my_url?p=$proj{'path'};a=summary";
5615                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5616         }
5617         print <<XML;
5618 </outline>
5619 </body>
5620 </opml>
5621 XML
5622 }