gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 373
 374 # version of the core git binary
 375 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 376
 377 $projects_list ||= $projectroot;
 378
 379 # ======================================================================
 380 # input validation and dispatch
 381 our $action = $cgi->param('a');
 382 if (defined $action) {
 383         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 384                 die_error(undef, "Invalid action parameter");
 385         }
 386 }
 387
 388 # parameters which are pathnames
 389 our $project = $cgi->param('p');
 390 if (defined $project) {
 391         if (!validate_pathname($project) ||
 392             !(-d "$projectroot/$project") ||
 393             !check_head_link("$projectroot/$project") ||
 394             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 395             ($strict_export && !project_in_list($project))) {
 396                 undef $project;
 397                 die_error(undef, "No such project");
 398         }
 399 }
 400
 401 our $file_name = $cgi->param('f');
 402 if (defined $file_name) {
 403         if (!validate_pathname($file_name)) {
 404                 die_error(undef, "Invalid file parameter");
 405         }
 406 }
 407
 408 our $file_parent = $cgi->param('fp');
 409 if (defined $file_parent) {
 410         if (!validate_pathname($file_parent)) {
 411                 die_error(undef, "Invalid file parent parameter");
 412         }
 413 }
 414
 415 # parameters which are refnames
 416 our $hash = $cgi->param('h');
 417 if (defined $hash) {
 418         if (!validate_refname($hash)) {
 419                 die_error(undef, "Invalid hash parameter");
 420         }
 421 }
 422
 423 our $hash_parent = $cgi->param('hp');
 424 if (defined $hash_parent) {
 425         if (!validate_refname($hash_parent)) {
 426                 die_error(undef, "Invalid hash parent parameter");
 427         }
 428 }
 429
 430 our $hash_base = $cgi->param('hb');
 431 if (defined $hash_base) {
 432         if (!validate_refname($hash_base)) {
 433                 die_error(undef, "Invalid hash base parameter");
 434         }
 435 }
 436
 437 my %allowed_options = (
 438         "--no-merges" => [ qw(rss atom log shortlog history) ],
 439 );
 440
 441 our @extra_options = $cgi->param('opt');
 442 if (defined @extra_options) {
 443         foreach my $opt (@extra_options) {
 444                 if (not exists $allowed_options{$opt}) {
 445                         die_error(undef, "Invalid option parameter");
 446                 }
 447                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 448                         die_error(undef, "Invalid option parameter for this action");
 449                 }
 450         }
 451 }
 452
 453 our $hash_parent_base = $cgi->param('hpb');
 454 if (defined $hash_parent_base) {
 455         if (!validate_refname($hash_parent_base)) {
 456                 die_error(undef, "Invalid hash parent base parameter");
 457         }
 458 }
 459
 460 # other parameters
 461 our $page = $cgi->param('pg');
 462 if (defined $page) {
 463         if ($page =~ m/[^0-9]/) {
 464                 die_error(undef, "Invalid page parameter");
 465         }
 466 }
 467
 468 our $searchtype = $cgi->param('st');
 469 if (defined $searchtype) {
 470         if ($searchtype =~ m/[^a-z]/) {
 471                 die_error(undef, "Invalid searchtype parameter");
 472         }
 473 }
 474
 475 our $searchtext = $cgi->param('s');
 476 our $search_regexp;
 477 if (defined $searchtext) {
 478         if (length($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                 my $pfxdepth = ($dir =~ tr!/!!);
1517
1518                 File::Find::find({
1519                         follow_fast => 1, # follow symbolic links
1520                         follow_skip => 2, # ignore duplicates
1521                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1522                         wanted => sub {
1523                                 # skip project-list toplevel, if we get it.
1524                                 return if (m!^[/.]$!);
1525                                 # only directories can be git repositories
1526                                 return unless (-d $_);
1527                                 # don't traverse too deep (Find is super slow on os x)
1528                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1529                                         $File::Find::prune = 1;
1530                                         return;
1531                                 }
1532
1533                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1534                                 # we check related file in $projectroot
1535                                 if ($check_forks and $subdir =~ m#/.#) {
1536                                         $File::Find::prune = 1;
1537                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1538                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1539                                         $File::Find::prune = 1;
1540                                 }
1541                         },
1542                 }, "$dir");
1543
1544         } elsif (-f $projects_list) {
1545                 # read from file(url-encoded):
1546                 # 'git%2Fgit.git Linus+Torvalds'
1547                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1548                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1549                 my %paths;
1550                 open my ($fd), $projects_list or return;
1551         PROJECT:
1552                 while (my $line = <$fd>) {
1553                         chomp $line;
1554                         my ($path, $owner) = split ' ', $line;
1555                         $path = unescape($path);
1556                         $owner = unescape($owner);
1557                         if (!defined $path) {
1558                                 next;
1559                         }
1560                         if ($filter ne '') {
1561                                 # looking for forks;
1562                                 my $pfx = substr($path, 0, length($filter));
1563                                 if ($pfx ne $filter) {
1564                                         next PROJECT;
1565                                 }
1566                                 my $sfx = substr($path, length($filter));
1567                                 if ($sfx !~ /^\/.*\.git$/) {
1568                                         next PROJECT;
1569                                 }
1570                         } elsif ($check_forks) {
1571                         PATH:
1572                                 foreach my $filter (keys %paths) {
1573                                         # looking for forks;
1574                                         my $pfx = substr($path, 0, length($filter));
1575                                         if ($pfx ne $filter) {
1576                                                 next PATH;
1577                                         }
1578                                         my $sfx = substr($path, length($filter));
1579                                         if ($sfx !~ /^\/.*\.git$/) {
1580                                                 next PATH;
1581                                         }
1582                                         # is a fork, don't include it in
1583                                         # the list
1584                                         next PROJECT;
1585                                 }
1586                         }
1587                         if (check_export_ok("$projectroot/$path")) {
1588                                 my $pr = {
1589                                         path => $path,
1590                                         owner => to_utf8($owner),
1591                                 };
1592                                 push @list, $pr;
1593                                 (my $forks_path = $path) =~ s/\.git$//;
1594                                 $paths{$forks_path}++;
1595                         }
1596                 }
1597                 close $fd;
1598         }
1599         return @list;
1600 }
1601
1602 our $gitweb_project_owner = undef;
1603 sub git_get_project_list_from_file {
1604
1605         return if (defined $gitweb_project_owner);
1606
1607         $gitweb_project_owner = {};
1608         # read from file (url-encoded):
1609         # 'git%2Fgit.git Linus+Torvalds'
1610         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1611         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1612         if (-f $projects_list) {
1613                 open (my $fd , $projects_list);
1614                 while (my $line = <$fd>) {
1615                         chomp $line;
1616                         my ($pr, $ow) = split ' ', $line;
1617                         $pr = unescape($pr);
1618                         $ow = unescape($ow);
1619                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1620                 }
1621                 close $fd;
1622         }
1623 }
1624
1625 sub git_get_project_owner {
1626         my $project = shift;
1627         my $owner;
1628
1629         return undef unless $project;
1630
1631         if (!defined $gitweb_project_owner) {
1632                 git_get_project_list_from_file();
1633         }
1634
1635         if (exists $gitweb_project_owner->{$project}) {
1636                 $owner = $gitweb_project_owner->{$project};
1637         }
1638         if (!defined $owner) {
1639                 $owner = get_file_owner("$projectroot/$project");
1640         }
1641
1642         return $owner;
1643 }
1644
1645 sub git_get_last_activity {
1646         my ($path) = @_;
1647         my $fd;
1648
1649         $git_dir = "$projectroot/$path";
1650         open($fd, "-|", git_cmd(), 'for-each-ref',
1651              '--format=%(committer)',
1652              '--sort=-committerdate',
1653              '--count=1',
1654              'refs/heads') or return;
1655         my $most_recent = <$fd>;
1656         close $fd or return;
1657         if (defined $most_recent &&
1658             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1659                 my $timestamp = $1;
1660                 my $age = time - $timestamp;
1661                 return ($age, age_string($age));
1662         }
1663         return (undef, undef);
1664 }
1665
1666 sub git_get_references {
1667         my $type = shift || "";
1668         my %refs;
1669         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1670         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1671         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1672                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1673                 or return;
1674
1675         while (my $line = <$fd>) {
1676                 chomp $line;
1677                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1678                         if (defined $refs{$1}) {
1679                                 push @{$refs{$1}}, $2;
1680                         } else {
1681                                 $refs{$1} = [ $2 ];
1682                         }
1683                 }
1684         }
1685         close $fd or return;
1686         return \%refs;
1687 }
1688
1689 sub git_get_rev_name_tags {
1690         my $hash = shift || return undef;
1691
1692         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1693                 or return;
1694         my $name_rev = <$fd>;
1695         close $fd;
1696
1697         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1698                 return $1;
1699         } else {
1700                 # catches also '$hash undefined' output
1701                 return undef;
1702         }
1703 }
1704
1705 ## ----------------------------------------------------------------------
1706 ## parse to hash functions
1707
1708 sub parse_date {
1709         my $epoch = shift;
1710         my $tz = shift || "-0000";
1711
1712         my %date;
1713         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1714         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1715         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1716         $date{'hour'} = $hour;
1717         $date{'minute'} = $min;
1718         $date{'mday'} = $mday;
1719         $date{'day'} = $days[$wday];
1720         $date{'month'} = $months[$mon];
1721         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1722                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1723         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1724                              $mday, $months[$mon], $hour ,$min;
1725         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1726                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1727
1728         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1729         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1730         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1731         $date{'hour_local'} = $hour;
1732         $date{'minute_local'} = $min;
1733         $date{'tz_local'} = $tz;
1734         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1735                                   1900+$year, $mon+1, $mday,
1736                                   $hour, $min, $sec, $tz);
1737         return %date;
1738 }
1739
1740 sub parse_tag {
1741         my $tag_id = shift;
1742         my %tag;
1743         my @comment;
1744
1745         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1746         $tag{'id'} = $tag_id;
1747         while (my $line = <$fd>) {
1748                 chomp $line;
1749                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1750                         $tag{'object'} = $1;
1751                 } elsif ($line =~ m/^type (.+)$/) {
1752                         $tag{'type'} = $1;
1753                 } elsif ($line =~ m/^tag (.+)$/) {
1754                         $tag{'name'} = $1;
1755                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1756                         $tag{'author'} = $1;
1757                         $tag{'epoch'} = $2;
1758                         $tag{'tz'} = $3;
1759                 } elsif ($line =~ m/--BEGIN/) {
1760                         push @comment, $line;
1761                         last;
1762                 } elsif ($line eq "") {
1763                         last;
1764                 }
1765         }
1766         push @comment, <$fd>;
1767         $tag{'comment'} = \@comment;
1768         close $fd or return;
1769         if (!defined $tag{'name'}) {
1770                 return
1771         };
1772         return %tag
1773 }
1774
1775 sub parse_commit_text {
1776         my ($commit_text, $withparents) = @_;
1777         my @commit_lines = split '\n', $commit_text;
1778         my %co;
1779
1780         pop @commit_lines; # Remove '\0'
1781
1782         if (! @commit_lines) {
1783                 return;
1784         }
1785
1786         my $header = shift @commit_lines;
1787         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1788                 return;
1789         }
1790         ($co{'id'}, my @parents) = split ' ', $header;
1791         while (my $line = shift @commit_lines) {
1792                 last if $line eq "\n";
1793                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1794                         $co{'tree'} = $1;
1795                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1796                         push @parents, $1;
1797                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1798                         $co{'author'} = $1;
1799                         $co{'author_epoch'} = $2;
1800                         $co{'author_tz'} = $3;
1801                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1802                                 $co{'author_name'}  = $1;
1803                                 $co{'author_email'} = $2;
1804                         } else {
1805                                 $co{'author_name'} = $co{'author'};
1806                         }
1807                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1808                         $co{'committer'} = $1;
1809                         $co{'committer_epoch'} = $2;
1810                         $co{'committer_tz'} = $3;
1811                         $co{'committer_name'} = $co{'committer'};
1812                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1813                                 $co{'committer_name'}  = $1;
1814                                 $co{'committer_email'} = $2;
1815                         } else {
1816                                 $co{'committer_name'} = $co{'committer'};
1817                         }
1818                 }
1819         }
1820         if (!defined $co{'tree'}) {
1821                 return;
1822         };
1823         $co{'parents'} = \@parents;
1824         $co{'parent'} = $parents[0];
1825
1826         foreach my $title (@commit_lines) {
1827                 $title =~ s/^    //;
1828                 if ($title ne "") {
1829                         $co{'title'} = chop_str($title, 80, 5);
1830                         # remove leading stuff of merges to make the interesting part visible
1831                         if (length($title) > 50) {
1832                                 $title =~ s/^Automatic //;
1833                                 $title =~ s/^merge (of|with) /Merge ... /i;
1834                                 if (length($title) > 50) {
1835                                         $title =~ s/(http|rsync):\/\///;
1836                                 }
1837                                 if (length($title) > 50) {
1838                                         $title =~ s/(master|www|rsync)\.//;
1839                                 }
1840                                 if (length($title) > 50) {
1841                                         $title =~ s/kernel.org:?//;
1842                                 }
1843                                 if (length($title) > 50) {
1844                                         $title =~ s/\/pub\/scm//;
1845                                 }
1846                         }
1847                         $co{'title_short'} = chop_str($title, 50, 5);
1848                         last;
1849                 }
1850         }
1851         if ($co{'title'} eq "") {
1852                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1853         }
1854         # remove added spaces
1855         foreach my $line (@commit_lines) {
1856                 $line =~ s/^    //;
1857         }
1858         $co{'comment'} = \@commit_lines;
1859
1860         my $age = time - $co{'committer_epoch'};
1861         $co{'age'} = $age;
1862         $co{'age_string'} = age_string($age);
1863         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1864         if ($age > 60*60*24*7*2) {
1865                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1866                 $co{'age_string_age'} = $co{'age_string'};
1867         } else {
1868                 $co{'age_string_date'} = $co{'age_string'};
1869                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1870         }
1871         return %co;
1872 }
1873
1874 sub parse_commit {
1875         my ($commit_id) = @_;
1876         my %co;
1877
1878         local $/ = "\0";
1879
1880         open my $fd, "-|", git_cmd(), "rev-list",
1881                 "--parents",
1882                 "--header",
1883                 "--max-count=1",
1884                 $commit_id,
1885                 "--",
1886                 or die_error(undef, "Open git-rev-list failed");
1887         %co = parse_commit_text(<$fd>, 1);
1888         close $fd;
1889
1890         return %co;
1891 }
1892
1893 sub parse_commits {
1894         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1895         my @cos;
1896
1897         $maxcount ||= 1;
1898         $skip ||= 0;
1899
1900         local $/ = "\0";
1901
1902         open my $fd, "-|", git_cmd(), "rev-list",
1903                 "--header",
1904                 ($arg ? ($arg) : ()),
1905                 ("--max-count=" . $maxcount),
1906                 ("--skip=" . $skip),
1907                 @extra_options,
1908                 $commit_id,
1909                 "--",
1910                 ($filename ? ($filename) : ())
1911                 or die_error(undef, "Open git-rev-list failed");
1912         while (my $line = <$fd>) {
1913                 my %co = parse_commit_text($line);
1914                 push @cos, \%co;
1915         }
1916         close $fd;
1917
1918         return wantarray ? @cos : \@cos;
1919 }
1920
1921 # parse ref from ref_file, given by ref_id, with given type
1922 sub parse_ref {
1923         my $ref_file = shift;
1924         my $ref_id = shift;
1925         my $type = shift || git_get_type($ref_id);
1926         my %ref_item;
1927
1928         $ref_item{'type'} = $type;
1929         $ref_item{'id'} = $ref_id;
1930         $ref_item{'epoch'} = 0;
1931         $ref_item{'age'} = "unknown";
1932         if ($type eq "tag") {
1933                 my %tag = parse_tag($ref_id);
1934                 $ref_item{'comment'} = $tag{'comment'};
1935                 if ($tag{'type'} eq "commit") {
1936                         my %co = parse_commit($tag{'object'});
1937                         $ref_item{'epoch'} = $co{'committer_epoch'};
1938                         $ref_item{'age'} = $co{'age_string'};
1939                 } elsif (defined($tag{'epoch'})) {
1940                         my $age = time - $tag{'epoch'};
1941                         $ref_item{'epoch'} = $tag{'epoch'};
1942                         $ref_item{'age'} = age_string($age);
1943                 }
1944                 $ref_item{'reftype'} = $tag{'type'};
1945                 $ref_item{'name'} = $tag{'name'};
1946                 $ref_item{'refid'} = $tag{'object'};
1947         } elsif ($type eq "commit"){
1948                 my %co = parse_commit($ref_id);
1949                 $ref_item{'reftype'} = "commit";
1950                 $ref_item{'name'} = $ref_file;
1951                 $ref_item{'title'} = $co{'title'};
1952                 $ref_item{'refid'} = $ref_id;
1953                 $ref_item{'epoch'} = $co{'committer_epoch'};
1954                 $ref_item{'age'} = $co{'age_string'};
1955         } else {
1956                 $ref_item{'reftype'} = $type;
1957                 $ref_item{'name'} = $ref_file;
1958                 $ref_item{'refid'} = $ref_id;
1959         }
1960
1961         return %ref_item;
1962 }
1963
1964 # parse line of git-diff-tree "raw" output
1965 sub parse_difftree_raw_line {
1966         my $line = shift;
1967         my %res;
1968
1969         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1970         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1971         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1972                 $res{'from_mode'} = $1;
1973                 $res{'to_mode'} = $2;
1974                 $res{'from_id'} = $3;
1975                 $res{'to_id'} = $4;
1976                 $res{'status'} = $5;
1977                 $res{'similarity'} = $6;
1978                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1979                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1980                 } else {
1981                         $res{'file'} = unquote($7);
1982                 }
1983         }
1984         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1985         # combined diff (for merge commit)
1986         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1987                 $res{'nparents'}  = length($1);
1988                 $res{'from_mode'} = [ split(' ', $2) ];
1989                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1990                 $res{'from_id'} = [ split(' ', $3) ];
1991                 $res{'to_id'} = pop @{$res{'from_id'}};
1992                 $res{'status'} = [ split('', $4) ];
1993                 $res{'to_file'} = unquote($5);
1994         }
1995         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1996         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1997                 $res{'commit'} = $1;
1998         }
1999
2000         return wantarray ? %res : \%res;
2001 }
2002
2003 # parse line of git-ls-tree output
2004 sub parse_ls_tree_line ($;%) {
2005         my $line = shift;
2006         my %opts = @_;
2007         my %res;
2008
2009         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2010         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2011
2012         $res{'mode'} = $1;
2013         $res{'type'} = $2;
2014         $res{'hash'} = $3;
2015         if ($opts{'-z'}) {
2016                 $res{'name'} = $4;
2017         } else {
2018                 $res{'name'} = unquote($4);
2019         }
2020
2021         return wantarray ? %res : \%res;
2022 }
2023
2024 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2025 sub parse_from_to_diffinfo {
2026         my ($diffinfo, $from, $to, @parents) = @_;
2027
2028         if ($diffinfo->{'nparents'}) {
2029                 # combined diff
2030                 $from->{'file'} = [];
2031                 $from->{'href'} = [];
2032                 fill_from_file_info($diffinfo, @parents)
2033                         unless exists $diffinfo->{'from_file'};
2034                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2035                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2036                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2037                                 $from->{'href'}[$i] = href(action=>"blob",
2038                                                            hash_base=>$parents[$i],
2039                                                            hash=>$diffinfo->{'from_id'}[$i],
2040                                                            file_name=>$from->{'file'}[$i]);
2041                         } else {
2042                                 $from->{'href'}[$i] = undef;
2043                         }
2044                 }
2045         } else {
2046                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2047                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2048                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2049                                                hash=>$diffinfo->{'from_id'},
2050                                                file_name=>$from->{'file'});
2051                 } else {
2052                         delete $from->{'href'};
2053                 }
2054         }
2055
2056         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2057         if (!is_deleted($diffinfo)) { # file exists in result
2058                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2059                                      hash=>$diffinfo->{'to_id'},
2060                                      file_name=>$to->{'file'});
2061         } else {
2062                 delete $to->{'href'};
2063         }
2064 }
2065
2066 ## ......................................................................
2067 ## parse to array of hashes functions
2068
2069 sub git_get_heads_list {
2070         my $limit = shift;
2071         my @headslist;
2072
2073         open my $fd, '-|', git_cmd(), 'for-each-ref',
2074                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2075                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2076                 'refs/heads'
2077                 or return;
2078         while (my $line = <$fd>) {
2079                 my %ref_item;
2080
2081                 chomp $line;
2082                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2083                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2084                 my ($committer, $epoch, $tz) =
2085                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2086                 $name =~ s!^refs/heads/!!;
2087
2088                 $ref_item{'name'}  = $name;
2089                 $ref_item{'id'}    = $hash;
2090                 $ref_item{'title'} = $title || '(no commit message)';
2091                 $ref_item{'epoch'} = $epoch;
2092                 if ($epoch) {
2093                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2094                 } else {
2095                         $ref_item{'age'} = "unknown";
2096                 }
2097
2098                 push @headslist, \%ref_item;
2099         }
2100         close $fd;
2101
2102         return wantarray ? @headslist : \@headslist;
2103 }
2104
2105 sub git_get_tags_list {
2106         my $limit = shift;
2107         my @tagslist;
2108
2109         open my $fd, '-|', git_cmd(), 'for-each-ref',
2110                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2111                 '--format=%(objectname) %(objecttype) %(refname) '.
2112                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2113                 'refs/tags'
2114                 or return;
2115         while (my $line = <$fd>) {
2116                 my %ref_item;
2117
2118                 chomp $line;
2119                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2120                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2121                 my ($creator, $epoch, $tz) =
2122                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2123                 $name =~ s!^refs/tags/!!;
2124
2125                 $ref_item{'type'} = $type;
2126                 $ref_item{'id'} = $id;
2127                 $ref_item{'name'} = $name;
2128                 if ($type eq "tag") {
2129                         $ref_item{'subject'} = $title;
2130                         $ref_item{'reftype'} = $reftype;
2131                         $ref_item{'refid'}   = $refid;
2132                 } else {
2133                         $ref_item{'reftype'} = $type;
2134                         $ref_item{'refid'}   = $id;
2135                 }
2136
2137                 if ($type eq "tag" || $type eq "commit") {
2138                         $ref_item{'epoch'} = $epoch;
2139                         if ($epoch) {
2140                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2141                         } else {
2142                                 $ref_item{'age'} = "unknown";
2143                         }
2144                 }
2145
2146                 push @tagslist, \%ref_item;
2147         }
2148         close $fd;
2149
2150         return wantarray ? @tagslist : \@tagslist;
2151 }
2152
2153 ## ----------------------------------------------------------------------
2154 ## filesystem-related functions
2155
2156 sub get_file_owner {
2157         my $path = shift;
2158
2159         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2160         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2161         if (!defined $gcos) {
2162                 return undef;
2163         }
2164         my $owner = $gcos;
2165         $owner =~ s/[,;].*$//;
2166         return to_utf8($owner);
2167 }
2168
2169 ## ......................................................................
2170 ## mimetype related functions
2171
2172 sub mimetype_guess_file {
2173         my $filename = shift;
2174         my $mimemap = shift;
2175         -r $mimemap or return undef;
2176
2177         my %mimemap;
2178         open(MIME, $mimemap) or return undef;
2179         while (<MIME>) {
2180                 next if m/^#/; # skip comments
2181                 my ($mime, $exts) = split(/\t+/);
2182                 if (defined $exts) {
2183                         my @exts = split(/\s+/, $exts);
2184                         foreach my $ext (@exts) {
2185                                 $mimemap{$ext} = $mime;
2186                         }
2187                 }
2188         }
2189         close(MIME);
2190
2191         $filename =~ /\.([^.]*)$/;
2192         return $mimemap{$1};
2193 }
2194
2195 sub mimetype_guess {
2196         my $filename = shift;
2197         my $mime;
2198         $filename =~ /\./ or return undef;
2199
2200         if ($mimetypes_file) {
2201                 my $file = $mimetypes_file;
2202                 if ($file !~ m!^/!) { # if it is relative path
2203                         # it is relative to project
2204                         $file = "$projectroot/$project/$file";
2205                 }
2206                 $mime = mimetype_guess_file($filename, $file);
2207         }
2208         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2209         return $mime;
2210 }
2211
2212 sub blob_mimetype {
2213         my $fd = shift;
2214         my $filename = shift;
2215
2216         if ($filename) {
2217                 my $mime = mimetype_guess($filename);
2218                 $mime and return $mime;
2219         }
2220
2221         # just in case
2222         return $default_blob_plain_mimetype unless $fd;
2223
2224         if (-T $fd) {
2225                 return 'text/plain' .
2226                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2227         } elsif (! $filename) {
2228                 return 'application/octet-stream';
2229         } elsif ($filename =~ m/\.png$/i) {
2230                 return 'image/png';
2231         } elsif ($filename =~ m/\.gif$/i) {
2232                 return 'image/gif';
2233         } elsif ($filename =~ m/\.jpe?g$/i) {
2234                 return 'image/jpeg';
2235         } else {
2236                 return 'application/octet-stream';
2237         }
2238 }
2239
2240 ## ======================================================================
2241 ## functions printing HTML: header, footer, error page
2242
2243 sub git_header_html {
2244         my $status = shift || "200 OK";
2245         my $expires = shift;
2246
2247         my $title = "$site_name";
2248         if (defined $project) {
2249                 $title .= " - " . to_utf8($project);
2250                 if (defined $action) {
2251                         $title .= "/$action";
2252                         if (defined $file_name) {
2253                                 $title .= " - " . esc_path($file_name);
2254                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2255                                         $title .= "/";
2256                                 }
2257                         }
2258                 }
2259         }
2260         my $content_type;
2261         # require explicit support from the UA if we are to send the page as
2262         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2263         # we have to do this because MSIE sometimes globs '*/*', pretending to
2264         # support xhtml+xml but choking when it gets what it asked for.
2265         if (defined $cgi->http('HTTP_ACCEPT') &&
2266             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2267             $cgi->Accept('application/xhtml+xml') != 0) {
2268                 $content_type = 'application/xhtml+xml';
2269         } else {
2270                 $content_type = 'text/html';
2271         }
2272         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2273                            -status=> $status, -expires => $expires);
2274         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2275         print <<EOF;
2276 <?xml version="1.0" encoding="utf-8"?>
2277 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2278 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2279 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2280 <!-- git core binaries version $git_version -->
2281 <head>
2282 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2283 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2284 <meta name="robots" content="index, nofollow"/>
2285 <title>$title</title>
2286 EOF
2287 # print out each stylesheet that exist
2288         if (defined $stylesheet) {
2289 #provides backwards capability for those people who define style sheet in a config file
2290                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2291         } else {
2292                 foreach my $stylesheet (@stylesheets) {
2293                         next unless $stylesheet;
2294                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2295                 }
2296         }
2297         if (defined $project) {
2298                 printf('<link rel="alternate" title="%s log RSS feed" '.
2299                        'href="%s" type="application/rss+xml" />'."\n",
2300                        esc_param($project), href(action=>"rss"));
2301                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2302                        'href="%s" type="application/rss+xml" />'."\n",
2303                        esc_param($project), href(action=>"rss",
2304                                                  extra_options=>"--no-merges"));
2305                 printf('<link rel="alternate" title="%s log Atom feed" '.
2306                        'href="%s" type="application/atom+xml" />'."\n",
2307                        esc_param($project), href(action=>"atom"));
2308                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2309                        'href="%s" type="application/atom+xml" />'."\n",
2310                        esc_param($project), href(action=>"atom",
2311                                                  extra_options=>"--no-merges"));
2312         } else {
2313                 printf('<link rel="alternate" title="%s projects list" '.
2314                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2315                        $site_name, href(project=>undef, action=>"project_index"));
2316                 printf('<link rel="alternate" title="%s projects feeds" '.
2317                        'href="%s" type="text/x-opml"/>'."\n",
2318                        $site_name, href(project=>undef, action=>"opml"));
2319         }
2320         if (defined $favicon) {
2321                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2322         }
2323
2324         print "</head>\n" .
2325               "<body>\n";
2326
2327         if (-f $site_header) {
2328                 open (my $fd, $site_header);
2329                 print <$fd>;
2330                 close $fd;
2331         }
2332
2333         print "<div class=\"page_header\">\n" .
2334               $cgi->a({-href => esc_url($logo_url),
2335                        -title => $logo_label},
2336                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2337         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2338         if (defined $project) {
2339                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2340                 if (defined $action) {
2341                         print " / $action";
2342                 }
2343                 print "\n";
2344         }
2345         print "</div>\n";
2346
2347         my ($have_search) = gitweb_check_feature('search');
2348         if ((defined $project) && ($have_search)) {
2349                 if (!defined $searchtext) {
2350                         $searchtext = "";
2351                 }
2352                 my $search_hash;
2353                 if (defined $hash_base) {
2354                         $search_hash = $hash_base;
2355                 } elsif (defined $hash) {
2356                         $search_hash = $hash;
2357                 } else {
2358                         $search_hash = "HEAD";
2359                 }
2360                 my $action = $my_uri;
2361                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2362                 if ($use_pathinfo) {
2363                         $action .= "/$project";
2364                 } else {
2365                         $cgi->param("p", $project);
2366                 }
2367                 $cgi->param("a", "search");
2368                 $cgi->param("h", $search_hash);
2369                 print $cgi->startform(-method => "get", -action => $action) .
2370                       "<div class=\"search\">\n" .
2371                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2372                       $cgi->hidden(-name => "a") . "\n" .
2373                       $cgi->hidden(-name => "h") . "\n" .
2374                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2375                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2376                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2377                       " search:\n",
2378                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2379                       "</div>" .
2380                       $cgi->end_form() . "\n";
2381         }
2382 }
2383
2384 sub git_footer_html {
2385         print "<div class=\"page_footer\">\n";
2386         if (defined $project) {
2387                 my $descr = git_get_project_description($project);
2388                 if (defined $descr) {
2389                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2390                 }
2391                 print $cgi->a({-href => href(action=>"rss"),
2392                               -class => "rss_logo"}, "RSS") . " ";
2393                 print $cgi->a({-href => href(action=>"atom"),
2394                               -class => "rss_logo"}, "Atom") . "\n";
2395         } else {
2396                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2397                               -class => "rss_logo"}, "OPML") . " ";
2398                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2399                               -class => "rss_logo"}, "TXT") . "\n";
2400         }
2401         print "</div>\n" ;
2402
2403         if (-f $site_footer) {
2404                 open (my $fd, $site_footer);
2405                 print <$fd>;
2406                 close $fd;
2407         }
2408
2409         print "</body>\n" .
2410               "</html>";
2411 }
2412
2413 sub die_error {
2414         my $status = shift || "403 Forbidden";
2415         my $error = shift || "Malformed query, file missing or permission denied";
2416
2417         git_header_html($status);
2418         print <<EOF;
2419 <div class="page_body">
2420 <br /><br />
2421 $status - $error
2422 <br />
2423 </div>
2424 EOF
2425         git_footer_html();
2426         exit;
2427 }
2428
2429 ## ----------------------------------------------------------------------
2430 ## functions printing or outputting HTML: navigation
2431
2432 sub git_print_page_nav {
2433         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2434         $extra = '' if !defined $extra; # pager or formats
2435
2436         my @navs = qw(summary shortlog log commit commitdiff tree);
2437         if ($suppress) {
2438                 @navs = grep { $_ ne $suppress } @navs;
2439         }
2440
2441         my %arg = map { $_ => {action=>$_} } @navs;
2442         if (defined $head) {
2443                 for (qw(commit commitdiff)) {
2444                         $arg{$_}{'hash'} = $head;
2445                 }
2446                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2447                         for (qw(shortlog log)) {
2448                                 $arg{$_}{'hash'} = $head;
2449                         }
2450                 }
2451         }
2452         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2453         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2454
2455         print "<div class=\"page_nav\">\n" .
2456                 (join " | ",
2457                  map { $_ eq $current ?
2458                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2459                  } @navs);
2460         print "<br/>\n$extra<br/>\n" .
2461               "</div>\n";
2462 }
2463
2464 sub format_paging_nav {
2465         my ($action, $hash, $head, $page, $nrevs) = @_;
2466         my $paging_nav;
2467
2468
2469         if ($hash ne $head || $page) {
2470                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2471         } else {
2472                 $paging_nav .= "HEAD";
2473         }
2474
2475         if ($page > 0) {
2476                 $paging_nav .= " &sdot; " .
2477                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2478                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2479         } else {
2480                 $paging_nav .= " &sdot; prev";
2481         }
2482
2483         if ($nrevs >= (100 * ($page+1)-1)) {
2484                 $paging_nav .= " &sdot; " .
2485                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2486                                  -accesskey => "n", -title => "Alt-n"}, "next");
2487         } else {
2488                 $paging_nav .= " &sdot; next";
2489         }
2490
2491         return $paging_nav;
2492 }
2493
2494 ## ......................................................................
2495 ## functions printing or outputting HTML: div
2496
2497 sub git_print_header_div {
2498         my ($action, $title, $hash, $hash_base) = @_;
2499         my %args = ();
2500
2501         $args{'action'} = $action;
2502         $args{'hash'} = $hash if $hash;
2503         $args{'hash_base'} = $hash_base if $hash_base;
2504
2505         print "<div class=\"header\">\n" .
2506               $cgi->a({-href => href(%args), -class => "title"},
2507               $title ? $title : $action) .
2508               "\n</div>\n";
2509 }
2510
2511 #sub git_print_authorship (\%) {
2512 sub git_print_authorship {
2513         my $co = shift;
2514
2515         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2516         print "<div class=\"author_date\">" .
2517               esc_html($co->{'author_name'}) .
2518               " [$ad{'rfc2822'}";
2519         if ($ad{'hour_local'} < 6) {
2520                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2521                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2522         } else {
2523                 printf(" (%02d:%02d %s)",
2524                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2525         }
2526         print "]</div>\n";
2527 }
2528
2529 sub git_print_page_path {
2530         my $name = shift;
2531         my $type = shift;
2532         my $hb = shift;
2533
2534
2535         print "<div class=\"page_path\">";
2536         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2537                       -title => 'tree root'}, to_utf8("[$project]"));
2538         print " / ";
2539         if (defined $name) {
2540                 my @dirname = split '/', $name;
2541                 my $basename = pop @dirname;
2542                 my $fullname = '';
2543
2544                 foreach my $dir (@dirname) {
2545                         $fullname .= ($fullname ? '/' : '') . $dir;
2546                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2547                                                      hash_base=>$hb),
2548                                       -title => $fullname}, esc_path($dir));
2549                         print " / ";
2550                 }
2551                 if (defined $type && $type eq 'blob') {
2552                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2553                                                      hash_base=>$hb),
2554                                       -title => $name}, esc_path($basename));
2555                 } elsif (defined $type && $type eq 'tree') {
2556                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2557                                                      hash_base=>$hb),
2558                                       -title => $name}, esc_path($basename));
2559                         print " / ";
2560                 } else {
2561                         print esc_path($basename);
2562                 }
2563         }
2564         print "<br/></div>\n";
2565 }
2566
2567 # sub git_print_log (\@;%) {
2568 sub git_print_log ($;%) {
2569         my $log = shift;
2570         my %opts = @_;
2571
2572         if ($opts{'-remove_title'}) {
2573                 # remove title, i.e. first line of log
2574                 shift @$log;
2575         }
2576         # remove leading empty lines
2577         while (defined $log->[0] && $log->[0] eq "") {
2578                 shift @$log;
2579         }
2580
2581         # print log
2582         my $signoff = 0;
2583         my $empty = 0;
2584         foreach my $line (@$log) {
2585                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2586                         $signoff = 1;
2587                         $empty = 0;
2588                         if (! $opts{'-remove_signoff'}) {
2589                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2590                                 next;
2591                         } else {
2592                                 # remove signoff lines
2593                                 next;
2594                         }
2595                 } else {
2596                         $signoff = 0;
2597                 }
2598
2599                 # print only one empty line
2600                 # do not print empty line after signoff
2601                 if ($line eq "") {
2602                         next if ($empty || $signoff);
2603                         $empty = 1;
2604                 } else {
2605                         $empty = 0;
2606                 }
2607
2608                 print format_log_line_html($line) . "<br/>\n";
2609         }
2610
2611         if ($opts{'-final_empty_line'}) {
2612                 # end with single empty line
2613                 print "<br/>\n" unless $empty;
2614         }
2615 }
2616
2617 # return link target (what link points to)
2618 sub git_get_link_target {
2619         my $hash = shift;
2620         my $link_target;
2621
2622         # read link
2623         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2624                 or return;
2625         {
2626                 local $/;
2627                 $link_target = <$fd>;
2628         }
2629         close $fd
2630                 or return;
2631
2632         return $link_target;
2633 }
2634
2635 # given link target, and the directory (basedir) the link is in,
2636 # return target of link relative to top directory (top tree);
2637 # return undef if it is not possible (including absolute links).
2638 sub normalize_link_target {
2639         my ($link_target, $basedir, $hash_base) = @_;
2640
2641         # we can normalize symlink target only if $hash_base is provided
2642         return unless $hash_base;
2643
2644         # absolute symlinks (beginning with '/') cannot be normalized
2645         return if (substr($link_target, 0, 1) eq '/');
2646
2647         # normalize link target to path from top (root) tree (dir)
2648         my $path;
2649         if ($basedir) {
2650                 $path = $basedir . '/' . $link_target;
2651         } else {
2652                 # we are in top (root) tree (dir)
2653                 $path = $link_target;
2654         }
2655
2656         # remove //, /./, and /../
2657         my @path_parts;
2658         foreach my $part (split('/', $path)) {
2659                 # discard '.' and ''
2660                 next if (!$part || $part eq '.');
2661                 # handle '..'
2662                 if ($part eq '..') {
2663                         if (@path_parts) {
2664                                 pop @path_parts;
2665                         } else {
2666                                 # link leads outside repository (outside top dir)
2667                                 return;
2668                         }
2669                 } else {
2670                         push @path_parts, $part;
2671                 }
2672         }
2673         $path = join('/', @path_parts);
2674
2675         return $path;
2676 }
2677
2678 # print tree entry (row of git_tree), but without encompassing <tr> element
2679 sub git_print_tree_entry {
2680         my ($t, $basedir, $hash_base, $have_blame) = @_;
2681
2682         my %base_key = ();
2683         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2684
2685         # The format of a table row is: mode list link.  Where mode is
2686         # the mode of the entry, list is the name of the entry, an href,
2687         # and link is the action links of the entry.
2688
2689         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2690         if ($t->{'type'} eq "blob") {
2691                 print "<td class=\"list\">" .
2692                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2693                                                file_name=>"$basedir$t->{'name'}", %base_key),
2694                                 -class => "list"}, esc_path($t->{'name'}));
2695                 if (S_ISLNK(oct $t->{'mode'})) {
2696                         my $link_target = git_get_link_target($t->{'hash'});
2697                         if ($link_target) {
2698                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2699                                 if (defined $norm_target) {
2700                                         print " -> " .
2701                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2702                                                                      file_name=>$norm_target),
2703                                                        -title => $norm_target}, esc_path($link_target));
2704                                 } else {
2705                                         print " -> " . esc_path($link_target);
2706                                 }
2707                         }
2708                 }
2709                 print "</td>\n";
2710                 print "<td class=\"link\">";
2711                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2712                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2713                               "blob");
2714                 if ($have_blame) {
2715                         print " | " .
2716                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2717                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2718                                       "blame");
2719                 }
2720                 if (defined $hash_base) {
2721                         print " | " .
2722                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2723                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2724                                       "history");
2725                 }
2726                 print " | " .
2727                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2728                                                file_name=>"$basedir$t->{'name'}")},
2729                                 "raw");
2730                 print "</td>\n";
2731
2732         } elsif ($t->{'type'} eq "tree") {
2733                 print "<td class=\"list\">";
2734                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2735                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2736                               esc_path($t->{'name'}));
2737                 print "</td>\n";
2738                 print "<td class=\"link\">";
2739                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2740                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2741                               "tree");
2742                 if (defined $hash_base) {
2743                         print " | " .
2744                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2745                                                      file_name=>"$basedir$t->{'name'}")},
2746                                       "history");
2747                 }
2748                 print "</td>\n";
2749         } else {
2750                 # unknown object: we can only present history for it
2751                 # (this includes 'commit' object, i.e. submodule support)
2752                 print "<td class=\"list\">" .
2753                       esc_path($t->{'name'}) .
2754                       "</td>\n";
2755                 print "<td class=\"link\">";
2756                 if (defined $hash_base) {
2757                         print $cgi->a({-href => href(action=>"history",
2758                                                      hash_base=>$hash_base,
2759                                                      file_name=>"$basedir$t->{'name'}")},
2760                                       "history");
2761                 }
2762                 print "</td>\n";
2763         }
2764 }
2765
2766 ## ......................................................................
2767 ## functions printing large fragments of HTML
2768
2769 sub fill_from_file_info {
2770         my ($diff, @parents) = @_;
2771
2772         $diff->{'from_file'} = [ ];
2773         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2774         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2775                 if ($diff->{'status'}[$i] eq 'R' ||
2776                     $diff->{'status'}[$i] eq 'C') {
2777                         $diff->{'from_file'}[$i] =
2778                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2779                 }
2780         }
2781
2782         return $diff;
2783 }
2784
2785 # parameters can be strings, or references to arrays of strings
2786 sub from_ids_eq {
2787         my ($a, $b) = @_;
2788
2789         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2790                 for (my $i = 0; $i < @$a; ++$i) {
2791                         return 0 unless ($a->[$i] eq $b->[$i]);
2792                 }
2793                 return 1;
2794         } elsif (!ref($a) && !ref($b)) {
2795                 return $a eq $b;
2796         } else {
2797                 return 0;
2798         }
2799 }
2800
2801 sub is_deleted {
2802         my $diffinfo = shift;
2803
2804         return $diffinfo->{'to_id'} eq ('0' x 40);
2805 }
2806
2807 sub git_difftree_body {
2808         my ($difftree, $hash, @parents) = @_;
2809         my ($parent) = $parents[0];
2810         my ($have_blame) = gitweb_check_feature('blame');
2811         print "<div class=\"list_head\">\n";
2812         if ($#{$difftree} > 10) {
2813                 print(($#{$difftree} + 1) . " files changed:\n");
2814         }
2815         print "</div>\n";
2816
2817         print "<table class=\"" .
2818               (@parents > 1 ? "combined " : "") .
2819               "diff_tree\">\n";
2820
2821         # header only for combined diff in 'commitdiff' view
2822         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2823         if ($has_header) {
2824                 # table header
2825                 print "<thead><tr>\n" .
2826                        "<th></th><th></th>\n"; # filename, patchN link
2827                 for (my $i = 0; $i < @parents; $i++) {
2828                         my $par = $parents[$i];
2829                         print "<th>" .
2830                               $cgi->a({-href => href(action=>"commitdiff",
2831                                                      hash=>$hash, hash_parent=>$par),
2832                                        -title => 'commitdiff to parent number ' .
2833                                                   ($i+1) . ': ' . substr($par,0,7)},
2834                                       $i+1) .
2835                               "&nbsp;</th>\n";
2836                 }
2837                 print "</tr></thead>\n<tbody>\n";
2838         }
2839
2840         my $alternate = 1;
2841         my $patchno = 0;
2842         foreach my $line (@{$difftree}) {
2843                 my $diff;
2844                 if (ref($line) eq "HASH") {
2845                         # pre-parsed (or generated by hand)
2846                         $diff = $line;
2847                 } else {
2848                         $diff = parse_difftree_raw_line($line);
2849                 }
2850
2851                 if ($alternate) {
2852                         print "<tr class=\"dark\">\n";
2853                 } else {
2854                         print "<tr class=\"light\">\n";
2855                 }
2856                 $alternate ^= 1;
2857
2858                 if (exists $diff->{'nparents'}) { # combined diff
2859
2860                         fill_from_file_info($diff, @parents)
2861                                 unless exists $diff->{'from_file'};
2862
2863                         if (!is_deleted($diff)) {
2864                                 # file exists in the result (child) commit
2865                                 print "<td>" .
2866                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2867                                                              file_name=>$diff->{'to_file'},
2868                                                              hash_base=>$hash),
2869                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2870                                       "</td>\n";
2871                         } else {
2872                                 print "<td>" .
2873                                       esc_path($diff->{'to_file'}) .
2874                                       "</td>\n";
2875                         }
2876
2877                         if ($action eq 'commitdiff') {
2878                                 # link to patch
2879                                 $patchno++;
2880                                 print "<td class=\"link\">" .
2881                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2882                                       " | " .
2883                                       "</td>\n";
2884                         }
2885
2886                         my $has_history = 0;
2887                         my $not_deleted = 0;
2888                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2889                                 my $hash_parent = $parents[$i];
2890                                 my $from_hash = $diff->{'from_id'}[$i];
2891                                 my $from_path = $diff->{'from_file'}[$i];
2892                                 my $status = $diff->{'status'}[$i];
2893
2894                                 $has_history ||= ($status ne 'A');
2895                                 $not_deleted ||= ($status ne 'D');
2896
2897                                 if ($status eq 'A') {
2898                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2899                                 } elsif ($status eq 'D') {
2900                                         print "<td class=\"link\">" .
2901                                               $cgi->a({-href => href(action=>"blob",
2902                                                                      hash_base=>$hash,
2903                                                                      hash=>$from_hash,
2904                                                                      file_name=>$from_path)},
2905                                                       "blob" . ($i+1)) .
2906                                               " | </td>\n";
2907                                 } else {
2908                                         if ($diff->{'to_id'} eq $from_hash) {
2909                                                 print "<td class=\"link nochange\">";
2910                                         } else {
2911                                                 print "<td class=\"link\">";
2912                                         }
2913                                         print $cgi->a({-href => href(action=>"blobdiff",
2914                                                                      hash=>$diff->{'to_id'},
2915                                                                      hash_parent=>$from_hash,
2916                                                                      hash_base=>$hash,
2917                                                                      hash_parent_base=>$hash_parent,
2918                                                                      file_name=>$diff->{'to_file'},
2919                                                                      file_parent=>$from_path)},
2920                                                       "diff" . ($i+1)) .
2921                                               " | </td>\n";
2922                                 }
2923                         }
2924
2925                         print "<td class=\"link\">";
2926                         if ($not_deleted) {
2927                                 print $cgi->a({-href => href(action=>"blob",
2928                                                              hash=>$diff->{'to_id'},
2929                                                              file_name=>$diff->{'to_file'},
2930                                                              hash_base=>$hash)},
2931                                               "blob");
2932                                 print " | " if ($has_history);
2933                         }
2934                         if ($has_history) {
2935                                 print $cgi->a({-href => href(action=>"history",
2936                                                              file_name=>$diff->{'to_file'},
2937                                                              hash_base=>$hash)},
2938                                               "history");
2939                         }
2940                         print "</td>\n";
2941
2942                         print "</tr>\n";
2943                         next; # instead of 'else' clause, to avoid extra indent
2944                 }
2945                 # else ordinary diff
2946
2947                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2948                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2949                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2950                         $to_mode_oct = oct $diff->{'to_mode'};
2951                         if (S_ISREG($to_mode_oct)) { # only for regular file
2952                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2953                         }
2954                         $to_file_type = file_type($diff->{'to_mode'});
2955                 }
2956                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2957                         $from_mode_oct = oct $diff->{'from_mode'};
2958                         if (S_ISREG($to_mode_oct)) { # only for regular file
2959                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2960                         }
2961                         $from_file_type = file_type($diff->{'from_mode'});
2962                 }
2963
2964                 if ($diff->{'status'} eq "A") { # created
2965                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2966                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2967                         $mode_chng   .= "]</span>";
2968                         print "<td>";
2969                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2970                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2971                                       -class => "list"}, esc_path($diff->{'file'}));
2972                         print "</td>\n";
2973                         print "<td>$mode_chng</td>\n";
2974                         print "<td class=\"link\">";
2975                         if ($action eq 'commitdiff') {
2976                                 # link to patch
2977                                 $patchno++;
2978                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2979                                 print " | ";
2980                         }
2981                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2982                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2983                                       "blob");
2984                         print "</td>\n";
2985
2986                 } elsif ($diff->{'status'} eq "D") { # deleted
2987                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2988                         print "<td>";
2989                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2990                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2991                                        -class => "list"}, esc_path($diff->{'file'}));
2992                         print "</td>\n";
2993                         print "<td>$mode_chng</td>\n";
2994                         print "<td class=\"link\">";
2995                         if ($action eq 'commitdiff') {
2996                                 # link to patch
2997                                 $patchno++;
2998                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2999                                 print " | ";
3000                         }
3001                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3002                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3003                                       "blob") . " | ";
3004                         if ($have_blame) {
3005                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3006                                                              file_name=>$diff->{'file'})},
3007                                               "blame") . " | ";
3008                         }
3009                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3010                                                      file_name=>$diff->{'file'})},
3011                                       "history");
3012                         print "</td>\n";
3013
3014                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3015                         my $mode_chnge = "";
3016                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3017                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3018                                 if ($from_file_type ne $to_file_type) {
3019                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3020                                 }
3021                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3022                                         if ($from_mode_str && $to_mode_str) {
3023                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3024                                         } elsif ($to_mode_str) {
3025                                                 $mode_chnge .= " mode: $to_mode_str";
3026                                         }
3027                                 }
3028                                 $mode_chnge .= "]</span>\n";
3029                         }
3030                         print "<td>";
3031                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3032                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3033                                       -class => "list"}, esc_path($diff->{'file'}));
3034                         print "</td>\n";
3035                         print "<td>$mode_chnge</td>\n";
3036                         print "<td class=\"link\">";
3037                         if ($action eq 'commitdiff') {
3038                                 # link to patch
3039                                 $patchno++;
3040                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3041                                       " | ";
3042                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3043                                 # "commit" view and modified file (not onlu mode changed)
3044                                 print $cgi->a({-href => href(action=>"blobdiff",
3045                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3046                                                              hash_base=>$hash, hash_parent_base=>$parent,
3047                                                              file_name=>$diff->{'file'})},
3048                                               "diff") .
3049                                       " | ";
3050                         }
3051                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3052                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3053                                        "blob") . " | ";
3054                         if ($have_blame) {
3055                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3056                                                              file_name=>$diff->{'file'})},
3057                                               "blame") . " | ";
3058                         }
3059                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3060                                                      file_name=>$diff->{'file'})},
3061                                       "history");
3062                         print "</td>\n";
3063
3064                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3065                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3066                         my $nstatus = $status_name{$diff->{'status'}};
3067                         my $mode_chng = "";
3068                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3069                                 # mode also for directories, so we cannot use $to_mode_str
3070                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3071                         }
3072                         print "<td>" .
3073                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3074                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3075                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3076                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3077                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3078                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3079                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3080                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3081                               "<td class=\"link\">";
3082                         if ($action eq 'commitdiff') {
3083                                 # link to patch
3084                                 $patchno++;
3085                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3086                                       " | ";
3087                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3088                                 # "commit" view and modified file (not only pure rename or copy)
3089                                 print $cgi->a({-href => href(action=>"blobdiff",
3090                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3091                                                              hash_base=>$hash, hash_parent_base=>$parent,
3092                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3093                                               "diff") .
3094                                       " | ";
3095                         }
3096                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3097                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3098                                       "blob") . " | ";
3099                         if ($have_blame) {
3100                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3101                                                              file_name=>$diff->{'to_file'})},
3102                                               "blame") . " | ";
3103                         }
3104                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3105                                                     file_name=>$diff->{'to_file'})},
3106                                       "history");
3107                         print "</td>\n";
3108
3109                 } # we should not encounter Unmerged (U) or Unknown (X) status
3110                 print "</tr>\n";
3111         }
3112         print "</tbody>" if $has_header;
3113         print "</table>\n";
3114 }
3115
3116 sub git_patchset_body {
3117         my ($fd, $difftree, $hash, @hash_parents) = @_;
3118         my ($hash_parent) = $hash_parents[0];
3119
3120         my $patch_idx = 0;
3121         my $patch_number = 0;
3122         my $patch_line;
3123         my $diffinfo;
3124         my (%from, %to);
3125
3126         print "<div class=\"patchset\">\n";
3127
3128         # skip to first patch
3129         while ($patch_line = <$fd>) {
3130                 chomp $patch_line;
3131
3132                 last if ($patch_line =~ m/^diff /);
3133         }
3134
3135  PATCH:
3136         while ($patch_line) {
3137                 my @diff_header;
3138                 my ($from_id, $to_id);
3139
3140                 # git diff header
3141                 #assert($patch_line =~ m/^diff /) if DEBUG;
3142                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3143                 $patch_number++;
3144                 push @diff_header, $patch_line;
3145
3146                 # extended diff header
3147         EXTENDED_HEADER:
3148                 while ($patch_line = <$fd>) {
3149                         chomp $patch_line;
3150
3151                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3152
3153                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3154                                 $from_id = $1;
3155                                 $to_id   = $2;
3156                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3157                                 $from_id = [ split(',', $1) ];
3158                                 $to_id   = $2;
3159                         }
3160
3161                         push @diff_header, $patch_line;
3162                 }
3163                 my $last_patch_line = $patch_line;
3164
3165                 # check if current patch belong to current raw line
3166                 # and parse raw git-diff line if needed
3167                 if (defined $diffinfo &&
3168                     defined $from_id && defined $to_id &&
3169                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3170                     $diffinfo->{'to_id'} eq $to_id) {
3171                         # this is continuation of a split patch
3172                         print "<div class=\"patch cont\">\n";
3173                 } else {
3174                         # advance raw git-diff output if needed
3175                         $patch_idx++ if defined $diffinfo;
3176
3177                         # compact combined diff output can have some patches skipped
3178                         # find which patch (using pathname of result) we are at now
3179                         my $to_name;
3180                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3181                                 $to_name = $1;
3182                         }
3183
3184                         do {
3185                                 # read and prepare patch information
3186                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3187                                         # pre-parsed (or generated by hand)
3188                                         $diffinfo = $difftree->[$patch_idx];
3189                                 } else {
3190                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3191                                 }
3192
3193                                 # check if current raw line has no patch (it got simplified)
3194                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3195                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3196                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3197                                               "</div>\n";  # class="patch"
3198
3199                                         $patch_idx++;
3200                                         $patch_number++;
3201                                 }
3202                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3203                                  $patch_idx > $#$difftree);
3204
3205                         # modifies %from, %to hashes
3206                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3207
3208                         # this is first patch for raw difftree line with $patch_idx index
3209                         # we index @$difftree array from 0, but number patches from 1
3210                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3211                 }
3212
3213                 # print "git diff" header
3214                 $patch_line = shift @diff_header;
3215                 print format_git_diff_header_line($patch_line, $diffinfo,
3216                                                   \%from, \%to);
3217
3218                 # print extended diff header
3219                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3220         EXTENDED_HEADER:
3221                 foreach $patch_line (@diff_header) {
3222                         print format_extended_diff_header_line($patch_line, $diffinfo,
3223                                                                \%from, \%to);
3224                 }
3225                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3226
3227                 # from-file/to-file diff header
3228                 $patch_line = $last_patch_line;
3229                 if (! $patch_line) {
3230                         print "</div>\n"; # class="patch"
3231                         last PATCH;
3232                 }
3233                 next PATCH if ($patch_line =~ m/^diff /);
3234                 #assert($patch_line =~ m/^---/) if DEBUG;
3235                 #assert($patch_line eq $last_patch_line) if DEBUG;
3236
3237                 $patch_line = <$fd>;
3238                 chomp $patch_line;
3239                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3240
3241                 print format_diff_from_to_header($last_patch_line, $patch_line,
3242                                                  $diffinfo, \%from, \%to,
3243                                                  @hash_parents);
3244
3245                 # the patch itself
3246         LINE:
3247                 while ($patch_line = <$fd>) {
3248                         chomp $patch_line;
3249
3250                         next PATCH if ($patch_line =~ m/^diff /);
3251
3252                         print format_diff_line($patch_line, \%from, \%to);
3253                 }
3254
3255         } continue {
3256                 print "</div>\n"; # class="patch"
3257         }
3258
3259         # for compact combined (--cc) format, with chunk and patch simpliciaction
3260         # patchset might be empty, but there might be unprocessed raw lines
3261         for ($patch_idx++ if $patch_number > 0;
3262              $patch_idx < @$difftree;
3263              $patch_idx++) {
3264                 # read and prepare patch information
3265                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3266                         # pre-parsed (or generated by hand)
3267                         $diffinfo = $difftree->[$patch_idx];
3268                 } else {
3269                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3270                 }
3271
3272                 # generate anchor for "patch" links in difftree / whatchanged part
3273                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3274                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3275                       "</div>\n";  # class="patch"
3276
3277                 $patch_number++;
3278         }
3279
3280         if ($patch_number == 0) {
3281                 if (@hash_parents > 1) {
3282                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3283                 } else {
3284                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3285                 }
3286         }
3287
3288         print "</div>\n"; # class="patchset"
3289 }
3290
3291 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3292
3293 sub git_project_list_body {
3294         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3295
3296         my ($check_forks) = gitweb_check_feature('forks');
3297
3298         my @projects;
3299         foreach my $pr (@$projlist) {
3300                 my (@aa) = git_get_last_activity($pr->{'path'});
3301                 unless (@aa) {
3302                         next;
3303                 }
3304                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3305                 if (!defined $pr->{'descr'}) {
3306                         my $descr = git_get_project_description($pr->{'path'}) || "";
3307                         $pr->{'descr_long'} = to_utf8($descr);
3308                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3309                 }
3310                 if (!defined $pr->{'owner'}) {
3311                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3312                 }
3313                 if ($check_forks) {
3314                         my $pname = $pr->{'path'};
3315                         if (($pname =~ s/\.git$//) &&
3316                             ($pname !~ /\/$/) &&
3317                             (-d "$projectroot/$pname")) {
3318                                 $pr->{'forks'} = "-d $projectroot/$pname";
3319                         }
3320                         else {
3321                                 $pr->{'forks'} = 0;
3322                         }
3323                 }
3324                 push @projects, $pr;
3325         }
3326
3327         $order ||= $default_projects_order;
3328         $from = 0 unless defined $from;
3329         $to = $#projects if (!defined $to || $#projects < $to);
3330
3331         print "<table class=\"project_list\">\n";
3332         unless ($no_header) {
3333                 print "<tr>\n";
3334                 if ($check_forks) {
3335                         print "<th></th>\n";
3336                 }
3337                 if ($order eq "project") {
3338                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3339                         print "<th>Project</th>\n";
3340                 } else {
3341                         print "<th>" .
3342                               $cgi->a({-href => href(project=>undef, order=>'project'),
3343                                        -class => "header"}, "Project") .
3344                               "</th>\n";
3345                 }
3346                 if ($order eq "descr") {
3347                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3348                         print "<th>Description</th>\n";
3349                 } else {
3350                         print "<th>" .
3351                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3352                                        -class => "header"}, "Description") .
3353                               "</th>\n";
3354                 }
3355                 if ($order eq "owner") {
3356                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3357                         print "<th>Owner</th>\n";
3358                 } else {
3359                         print "<th>" .
3360                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3361                                        -class => "header"}, "Owner") .
3362                               "</th>\n";
3363                 }
3364                 if ($order eq "age") {
3365                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3366                         print "<th>Last Change</th>\n";
3367                 } else {
3368                         print "<th>" .
3369                               $cgi->a({-href => href(project=>undef, order=>'age'),
3370                                        -class => "header"}, "Last Change") .
3371                               "</th>\n";
3372                 }
3373                 print "<th></th>\n" .
3374                       "</tr>\n";
3375         }
3376         my $alternate = 1;
3377         for (my $i = $from; $i <= $to; $i++) {
3378                 my $pr = $projects[$i];
3379                 if ($alternate) {
3380                         print "<tr class=\"dark\">\n";
3381                 } else {
3382                         print "<tr class=\"light\">\n";
3383                 }
3384                 $alternate ^= 1;
3385                 if ($check_forks) {
3386                         print "<td>";
3387                         if ($pr->{'forks'}) {
3388                                 print "<!-- $pr->{'forks'} -->\n";
3389                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3390                         }
3391                         print "</td>\n";
3392                 }
3393                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3394                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3395                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3396                                         -class => "list", -title => $pr->{'descr_long'}},
3397                                         esc_html($pr->{'descr'})) . "</td>\n" .
3398                       "<td><i>" . esc_html(chop_str($pr->{'owner'}, 15)) . "</i></td>\n";
3399                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3400                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3401                       "<td class=\"link\">" .
3402                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3403                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3404                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3405                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3406                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3407                       "</td>\n" .
3408                       "</tr>\n";
3409         }
3410         if (defined $extra) {
3411                 print "<tr>\n";
3412                 if ($check_forks) {
3413                         print "<td></td>\n";
3414                 }
3415                 print "<td colspan=\"5\">$extra</td>\n" .
3416                       "</tr>\n";
3417         }
3418         print "</table>\n";
3419 }
3420
3421 sub git_shortlog_body {
3422         # uses global variable $project
3423         my ($commitlist, $from, $to, $refs, $extra) = @_;
3424
3425         $from = 0 unless defined $from;
3426         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3427
3428         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3429         my $alternate = 1;
3430         for (my $i = $from; $i <= $to; $i++) {
3431                 my %co = %{$commitlist->[$i]};
3432                 my $commit = $co{'id'};
3433                 my $ref = format_ref_marker($refs, $commit);
3434                 if ($alternate) {
3435                         print "<tr class=\"dark\">\n";
3436                 } else {
3437                         print "<tr class=\"light\">\n";
3438                 }
3439                 $alternate ^= 1;
3440                 my $author = chop_str($co{'author_name'}, 10);
3441                 if ($author ne $co{'author_name'}) {
3442                         $author = "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
3443                 } else {
3444                         $author = esc_html($author);
3445                 }
3446                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3447                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3448                       "<td><i>" . $author . "</i></td>\n" .
3449                       "<td>";
3450                 print format_subject_html($co{'title'}, $co{'title_short'},
3451                                           href(action=>"commit", hash=>$commit), $ref);
3452                 print "</td>\n" .
3453                       "<td class=\"link\">" .
3454                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3455                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3456                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3457                 my $snapshot_links = format_snapshot_links($commit);
3458                 if (defined $snapshot_links) {
3459                         print " | " . $snapshot_links;
3460                 }
3461                 print "</td>\n" .
3462                       "</tr>\n";
3463         }
3464         if (defined $extra) {
3465                 print "<tr>\n" .
3466                       "<td colspan=\"4\">$extra</td>\n" .
3467                       "</tr>\n";
3468         }
3469         print "</table>\n";
3470 }
3471
3472 sub git_history_body {
3473         # Warning: assumes constant type (blob or tree) during history
3474         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3475
3476         $from = 0 unless defined $from;
3477         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3478
3479         print "<table class=\"history\" cellspacing=\"0\">\n";
3480         my $alternate = 1;
3481         for (my $i = $from; $i <= $to; $i++) {
3482                 my %co = %{$commitlist->[$i]};
3483                 if (!%co) {
3484                         next;
3485                 }
3486                 my $commit = $co{'id'};
3487
3488                 my $ref = format_ref_marker($refs, $commit);
3489
3490                 if ($alternate) {
3491                         print "<tr class=\"dark\">\n";
3492                 } else {
3493                         print "<tr class=\"light\">\n";
3494                 }
3495                 $alternate ^= 1;
3496         # shortlog uses      chop_str($co{'author_name'}, 10)
3497                 my $author = chop_str($co{'author_name'}, 15, 3);
3498                 if ($author ne $co{'author_name'}) {
3499                         "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
3500                 } else {
3501                         $author = esc_html($author);
3502                 }
3503                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3504                       "<td><i>" . $author . "</i></td>\n" .
3505                       "<td>";
3506                 # originally git_history used chop_str($co{'title'}, 50)
3507                 print format_subject_html($co{'title'}, $co{'title_short'},
3508                                           href(action=>"commit", hash=>$commit), $ref);
3509                 print "</td>\n" .
3510                       "<td class=\"link\">" .
3511                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3512                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3513
3514                 if ($ftype eq 'blob') {
3515                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3516                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3517                         if (defined $blob_current && defined $blob_parent &&
3518                                         $blob_current ne $blob_parent) {
3519                                 print " | " .
3520                                         $cgi->a({-href => href(action=>"blobdiff",
3521                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3522                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3523                                                                file_name=>$file_name)},
3524                                                 "diff to current");
3525                         }
3526                 }
3527                 print "</td>\n" .
3528                       "</tr>\n";
3529         }
3530         if (defined $extra) {
3531                 print "<tr>\n" .
3532                       "<td colspan=\"4\">$extra</td>\n" .
3533                       "</tr>\n";
3534         }
3535         print "</table>\n";
3536 }
3537
3538 sub git_tags_body {
3539         # uses global variable $project
3540         my ($taglist, $from, $to, $extra) = @_;
3541         $from = 0 unless defined $from;
3542         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3543
3544         print "<table class=\"tags\" cellspacing=\"0\">\n";
3545         my $alternate = 1;
3546         for (my $i = $from; $i <= $to; $i++) {
3547                 my $entry = $taglist->[$i];
3548                 my %tag = %$entry;
3549                 my $comment = $tag{'subject'};
3550                 my $comment_short;
3551                 if (defined $comment) {
3552                         $comment_short = chop_str($comment, 30, 5);
3553                 }
3554                 if ($alternate) {
3555                         print "<tr class=\"dark\">\n";
3556                 } else {
3557                         print "<tr class=\"light\">\n";
3558                 }
3559                 $alternate ^= 1;
3560                 if (defined $tag{'age'}) {
3561                         print "<td><i>$tag{'age'}</i></td>\n";
3562                 } else {
3563                         print "<td></td>\n";
3564                 }
3565                 print "<td>" .
3566                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3567                                -class => "list name"}, esc_html($tag{'name'})) .
3568                       "</td>\n" .
3569                       "<td>";
3570                 if (defined $comment) {
3571                         print format_subject_html($comment, $comment_short,
3572                                                   href(action=>"tag", hash=>$tag{'id'}));
3573                 }
3574                 print "</td>\n" .
3575                       "<td class=\"selflink\">";
3576                 if ($tag{'type'} eq "tag") {
3577                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3578                 } else {
3579                         print "&nbsp;";
3580                 }
3581                 print "</td>\n" .
3582                       "<td class=\"link\">" . " | " .
3583                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3584                 if ($tag{'reftype'} eq "commit") {
3585                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3586                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3587                 } elsif ($tag{'reftype'} eq "blob") {
3588                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3589                 }
3590                 print "</td>\n" .
3591                       "</tr>";
3592         }
3593         if (defined $extra) {
3594                 print "<tr>\n" .
3595                       "<td colspan=\"5\">$extra</td>\n" .
3596                       "</tr>\n";
3597         }
3598         print "</table>\n";
3599 }
3600
3601 sub git_heads_body {
3602         # uses global variable $project
3603         my ($headlist, $head, $from, $to, $extra) = @_;
3604         $from = 0 unless defined $from;
3605         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3606
3607         print "<table class=\"heads\" cellspacing=\"0\">\n";
3608         my $alternate = 1;
3609         for (my $i = $from; $i <= $to; $i++) {
3610                 my $entry = $headlist->[$i];
3611                 my %ref = %$entry;
3612                 my $curr = $ref{'id'} eq $head;
3613                 if ($alternate) {
3614                         print "<tr class=\"dark\">\n";
3615                 } else {
3616                         print "<tr class=\"light\">\n";
3617                 }
3618                 $alternate ^= 1;
3619                 print "<td><i>$ref{'age'}</i></td>\n" .
3620                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3621                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3622                                -class => "list name"},esc_html($ref{'name'})) .
3623                       "</td>\n" .
3624                       "<td class=\"link\">" .
3625                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3626                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3627                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3628                       "</td>\n" .
3629                       "</tr>";
3630         }
3631         if (defined $extra) {
3632                 print "<tr>\n" .
3633                       "<td colspan=\"3\">$extra</td>\n" .
3634                       "</tr>\n";
3635         }
3636         print "</table>\n";
3637 }
3638
3639 sub git_search_grep_body {
3640         my ($commitlist, $from, $to, $extra) = @_;
3641         $from = 0 unless defined $from;
3642         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3643
3644         print "<table class=\"grep\" cellspacing=\"0\">\n";
3645         my $alternate = 1;
3646         for (my $i = $from; $i <= $to; $i++) {
3647                 my %co = %{$commitlist->[$i]};
3648                 if (!%co) {
3649                         next;
3650                 }
3651                 my $commit = $co{'id'};
3652                 if ($alternate) {
3653                         print "<tr class=\"dark\">\n";
3654                 } else {
3655                         print "<tr class=\"light\">\n";
3656                 }
3657                 $alternate ^= 1;
3658                 my $author = chop_str($co{'author_name'}, 15, 5);
3659                 if ($author ne $co{'author_name'}) {
3660                         $author = "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
3661                 } else {
3662                         $author = esc_html($author);
3663                 }
3664                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3665                       "<td><i>" . $author . "</i></td>\n" .
3666                       "<td>" .
3667                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3668                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3669                 my $comment = $co{'comment'};
3670                 foreach my $line (@$comment) {
3671                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3672                                 my $lead = esc_html($1) || "";
3673                                 $lead = chop_str($lead, 30, 10);
3674                                 my $match = esc_html($2) || "";
3675                                 my $trail = esc_html($3) || "";
3676                                 $trail = chop_str($trail, 30, 10);
3677                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3678                                 print chop_str($text, 80, 5) . "<br/>\n";
3679                         }
3680                 }
3681                 print "</td>\n" .
3682                       "<td class=\"link\">" .
3683                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3684                       " | " .
3685                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3686                 print "</td>\n" .
3687                       "</tr>\n";
3688         }
3689         if (defined $extra) {
3690                 print "<tr>\n" .
3691                       "<td colspan=\"3\">$extra</td>\n" .
3692                       "</tr>\n";
3693         }
3694         print "</table>\n";
3695 }
3696
3697 ## ======================================================================
3698 ## ======================================================================
3699 ## actions
3700
3701 sub git_project_list {
3702         my $order = $cgi->param('o');
3703         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3704                 die_error(undef, "Unknown order parameter");
3705         }
3706
3707         my @list = git_get_projects_list();
3708         if (!@list) {
3709                 die_error(undef, "No projects found");
3710         }
3711
3712         git_header_html();
3713         if (-f $home_text) {
3714                 print "<div class=\"index_include\">\n";
3715                 open (my $fd, $home_text);
3716                 print <$fd>;
3717                 close $fd;
3718                 print "</div>\n";
3719         }
3720         git_project_list_body(\@list, $order);
3721         git_footer_html();
3722 }
3723
3724 sub git_forks {
3725         my $order = $cgi->param('o');
3726         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3727                 die_error(undef, "Unknown order parameter");
3728         }
3729
3730         my @list = git_get_projects_list($project);
3731         if (!@list) {
3732                 die_error(undef, "No forks found");
3733         }
3734
3735         git_header_html();
3736         git_print_page_nav('','');
3737         git_print_header_div('summary', "$project forks");
3738         git_project_list_body(\@list, $order);
3739         git_footer_html();
3740 }
3741
3742 sub git_project_index {
3743         my @projects = git_get_projects_list($project);
3744
3745         print $cgi->header(
3746                 -type => 'text/plain',
3747                 -charset => 'utf-8',
3748                 -content_disposition => 'inline; filename="index.aux"');
3749
3750         foreach my $pr (@projects) {
3751                 if (!exists $pr->{'owner'}) {
3752                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3753                 }
3754
3755                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3756                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3757                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3758                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3759                 $path  =~ s/ /\+/g;
3760                 $owner =~ s/ /\+/g;
3761
3762                 print "$path $owner\n";
3763         }
3764 }
3765
3766 sub git_summary {
3767         my $descr = git_get_project_description($project) || "none";
3768         my %co = parse_commit("HEAD");
3769         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3770         my $head = $co{'id'};
3771
3772         my $owner = git_get_project_owner($project);
3773
3774         my $refs = git_get_references();
3775         # These get_*_list functions return one more to allow us to see if
3776         # there are more ...
3777         my @taglist  = git_get_tags_list(16);
3778         my @headlist = git_get_heads_list(16);
3779         my @forklist;
3780         my ($check_forks) = gitweb_check_feature('forks');
3781
3782         if ($check_forks) {
3783                 @forklist = git_get_projects_list($project);
3784         }
3785
3786         git_header_html();
3787         git_print_page_nav('summary','', $head);
3788
3789         print "<div class=\"title\">&nbsp;</div>\n";
3790         print "<table cellspacing=\"0\">\n" .
3791               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3792               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3793         if (defined $cd{'rfc2822'}) {
3794                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3795         }
3796
3797         # use per project git URL list in $projectroot/$project/cloneurl
3798         # or make project git URL from git base URL and project name
3799         my $url_tag = "URL";
3800         my @url_list = git_get_project_url_list($project);
3801         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3802         foreach my $git_url (@url_list) {
3803                 next unless $git_url;
3804                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3805                 $url_tag = "";
3806         }
3807         print "</table>\n";
3808
3809         if (-s "$projectroot/$project/README.html") {
3810                 if (open my $fd, "$projectroot/$project/README.html") {
3811                         print "<div class=\"title\">readme</div>\n";
3812                         print $_ while (<$fd>);
3813                         close $fd;
3814                 }
3815         }
3816
3817         # we need to request one more than 16 (0..15) to check if
3818         # those 16 are all
3819         my @commitlist = $head ? parse_commits($head, 17) : ();
3820         if (@commitlist) {
3821                 git_print_header_div('shortlog');
3822                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3823                                   $#commitlist <=  15 ? undef :
3824                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3825         }
3826
3827         if (@taglist) {
3828                 git_print_header_div('tags');
3829                 git_tags_body(\@taglist, 0, 15,
3830                               $#taglist <=  15 ? undef :
3831                               $cgi->a({-href => href(action=>"tags")}, "..."));
3832         }
3833
3834         if (@headlist) {
3835                 git_print_header_div('heads');
3836                 git_heads_body(\@headlist, $head, 0, 15,
3837                                $#headlist <= 15 ? undef :
3838                                $cgi->a({-href => href(action=>"heads")}, "..."));
3839         }
3840
3841         if (@forklist) {
3842                 git_print_header_div('forks');
3843                 git_project_list_body(\@forklist, undef, 0, 15,
3844                                       $#forklist <= 15 ? undef :
3845                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3846                                       'noheader');
3847         }
3848
3849         git_footer_html();
3850 }
3851
3852 sub git_tag {
3853         my $head = git_get_head_hash($project);
3854         git_header_html();
3855         git_print_page_nav('','', $head,undef,$head);
3856         my %tag = parse_tag($hash);
3857
3858         if (! %tag) {
3859                 die_error(undef, "Unknown tag object");
3860         }
3861
3862         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3863         print "<div class=\"title_text\">\n" .
3864               "<table cellspacing=\"0\">\n" .
3865               "<tr>\n" .
3866               "<td>object</td>\n" .
3867               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3868                                $tag{'object'}) . "</td>\n" .
3869               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3870                                               $tag{'type'}) . "</td>\n" .
3871               "</tr>\n";
3872         if (defined($tag{'author'})) {
3873                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3874                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3875                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3876                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3877                         "</td></tr>\n";
3878         }
3879         print "</table>\n\n" .
3880               "</div>\n";
3881         print "<div class=\"page_body\">";
3882         my $comment = $tag{'comment'};
3883         foreach my $line (@$comment) {
3884                 chomp $line;
3885                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3886         }
3887         print "</div>\n";
3888         git_footer_html();
3889 }
3890
3891 sub git_blame2 {
3892         my $fd;
3893         my $ftype;
3894
3895         my ($have_blame) = gitweb_check_feature('blame');
3896         if (!$have_blame) {
3897                 die_error('403 Permission denied', "Permission denied");
3898         }
3899         die_error('404 Not Found', "File name not defined") if (!$file_name);
3900         $hash_base ||= git_get_head_hash($project);
3901         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3902         my %co = parse_commit($hash_base)
3903                 or die_error(undef, "Reading commit failed");
3904         if (!defined $hash) {
3905                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3906                         or die_error(undef, "Error looking up file");
3907         }
3908         $ftype = git_get_type($hash);
3909         if ($ftype !~ "blob") {
3910                 die_error('400 Bad Request', "Object is not a blob");
3911         }
3912         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3913               $file_name, $hash_base)
3914                 or die_error(undef, "Open git-blame failed");
3915         git_header_html();
3916         my $formats_nav =
3917                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3918                         "blob") .
3919                 " | " .
3920                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3921                         "history") .
3922                 " | " .
3923                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3924                         "HEAD");
3925         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3926         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3927         git_print_page_path($file_name, $ftype, $hash_base);
3928         my @rev_color = (qw(light2 dark2));
3929         my $num_colors = scalar(@rev_color);
3930         my $current_color = 0;
3931         my $last_rev;
3932         print <<HTML;
3933 <div class="page_body">
3934 <table class="blame">
3935 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3936 HTML
3937         my %metainfo = ();
3938         while (1) {
3939                 $_ = <$fd>;
3940                 last unless defined $_;
3941                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3942                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3943                 if (!exists $metainfo{$full_rev}) {
3944                         $metainfo{$full_rev} = {};
3945                 }
3946                 my $meta = $metainfo{$full_rev};
3947                 while (<$fd>) {
3948                         last if (s/^\t//);
3949                         if (/^(\S+) (.*)$/) {
3950                                 $meta->{$1} = $2;
3951                         }
3952                 }
3953                 my $data = $_;
3954                 chomp $data;
3955                 my $rev = substr($full_rev, 0, 8);
3956                 my $author = $meta->{'author'};
3957                 my %date = parse_date($meta->{'author-time'},
3958                                       $meta->{'author-tz'});
3959                 my $date = $date{'iso-tz'};
3960                 if ($group_size) {
3961                         $current_color = ++$current_color % $num_colors;
3962                 }
3963                 print "<tr class=\"$rev_color[$current_color]\">\n";
3964                 if ($group_size) {
3965                         print "<td class=\"sha1\"";
3966                         print " title=\"". esc_html($author) . ", $date\"";
3967                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3968                         print ">";
3969                         print $cgi->a({-href => href(action=>"commit",
3970                                                      hash=>$full_rev,
3971                                                      file_name=>$file_name)},
3972                                       esc_html($rev));
3973                         print "</td>\n";
3974                 }
3975                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3976                         or die_error(undef, "Open git-rev-parse failed");
3977                 my $parent_commit = <$dd>;
3978                 close $dd;
3979                 chomp($parent_commit);
3980                 my $blamed = href(action => 'blame',
3981                                   file_name => $meta->{'filename'},
3982                                   hash_base => $parent_commit);
3983                 print "<td class=\"linenr\">";
3984                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3985                                 -id => "l$lineno",
3986                                 -class => "linenr" },
3987                               esc_html($lineno));
3988                 print "</td>";
3989                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3990                 print "</tr>\n";
3991         }
3992         print "</table>\n";
3993         print "</div>";
3994         close $fd
3995                 or print "Reading blob failed\n";
3996         git_footer_html();
3997 }
3998
3999 sub git_blame {
4000         my $fd;
4001
4002         my ($have_blame) = gitweb_check_feature('blame');
4003         if (!$have_blame) {
4004                 die_error('403 Permission denied', "Permission denied");
4005         }
4006         die_error('404 Not Found', "File name not defined") if (!$file_name);
4007         $hash_base ||= git_get_head_hash($project);
4008         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4009         my %co = parse_commit($hash_base)
4010                 or die_error(undef, "Reading commit failed");
4011         if (!defined $hash) {
4012                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4013                         or die_error(undef, "Error lookup file");
4014         }
4015         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4016                 or die_error(undef, "Open git-annotate failed");
4017         git_header_html();
4018         my $formats_nav =
4019                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4020                         "blob") .
4021                 " | " .
4022                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4023                         "history") .
4024                 " | " .
4025                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4026                         "HEAD");
4027         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4028         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4029         git_print_page_path($file_name, 'blob', $hash_base);
4030         print "<div class=\"page_body\">\n";
4031         print <<HTML;
4032 <table class="blame">
4033   <tr>
4034     <th>Commit</th>
4035     <th>Age</th>
4036     <th>Author</th>
4037     <th>Line</th>
4038     <th>Data</th>
4039   </tr>
4040 HTML
4041         my @line_class = (qw(light dark));
4042         my $line_class_len = scalar (@line_class);
4043         my $line_class_num = $#line_class;
4044         while (my $line = <$fd>) {
4045                 my $long_rev;
4046                 my $short_rev;
4047                 my $author;
4048                 my $time;
4049                 my $lineno;
4050                 my $data;
4051                 my $age;
4052                 my $age_str;
4053                 my $age_class;
4054
4055                 chomp $line;
4056                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4057
4058                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4059                         $long_rev = $1;
4060                         $author   = $2;
4061                         $time     = $3;
4062                         $lineno   = $4;
4063                         $data     = $5;
4064                 } else {
4065                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4066                         next;
4067                 }
4068                 $short_rev  = substr ($long_rev, 0, 8);
4069                 $age        = time () - $time;
4070                 $age_str    = age_string ($age);
4071                 $age_str    =~ s/ /&nbsp;/g;
4072                 $age_class  = age_class($age);
4073                 $author     = esc_html ($author);
4074                 $author     =~ s/ /&nbsp;/g;
4075
4076                 $data = untabify($data);
4077                 $data = esc_html ($data);
4078
4079                 print <<HTML;
4080   <tr class="$line_class[$line_class_num]">
4081     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4082     <td class="$age_class">$age_str</td>
4083     <td>$author</td>
4084     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4085     <td class="pre">$data</td>
4086   </tr>
4087 HTML
4088         } # while (my $line = <$fd>)
4089         print "</table>\n\n";
4090         close $fd
4091                 or print "Reading blob failed.\n";
4092         print "</div>";
4093         git_footer_html();
4094 }
4095
4096 sub git_tags {
4097         my $head = git_get_head_hash($project);
4098         git_header_html();
4099         git_print_page_nav('','', $head,undef,$head);
4100         git_print_header_div('summary', $project);
4101
4102         my @tagslist = git_get_tags_list();
4103         if (@tagslist) {
4104                 git_tags_body(\@tagslist);
4105         }
4106         git_footer_html();
4107 }
4108
4109 sub git_heads {
4110         my $head = git_get_head_hash($project);
4111         git_header_html();
4112         git_print_page_nav('','', $head,undef,$head);
4113         git_print_header_div('summary', $project);
4114
4115         my @headslist = git_get_heads_list();
4116         if (@headslist) {
4117                 git_heads_body(\@headslist, $head);
4118         }
4119         git_footer_html();
4120 }
4121
4122 sub git_blob_plain {
4123         my $expires;
4124
4125         if (!defined $hash) {
4126                 if (defined $file_name) {
4127                         my $base = $hash_base || git_get_head_hash($project);
4128                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4129                                 or die_error(undef, "Error lookup file");
4130                 } else {
4131                         die_error(undef, "No file name defined");
4132                 }
4133         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4134                 # blobs defined by non-textual hash id's can be cached
4135                 $expires = "+1d";
4136         }
4137
4138         my $type = shift;
4139         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4140                 or die_error(undef, "Couldn't cat $file_name, $hash");
4141
4142         $type ||= blob_mimetype($fd, $file_name);
4143
4144         # save as filename, even when no $file_name is given
4145         my $save_as = "$hash";
4146         if (defined $file_name) {
4147                 $save_as = $file_name;
4148         } elsif ($type =~ m/^text\//) {
4149                 $save_as .= '.txt';
4150         }
4151
4152         print $cgi->header(
4153                 -type => "$type",
4154                 -expires=>$expires,
4155                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4156         undef $/;
4157         binmode STDOUT, ':raw';
4158         print <$fd>;
4159         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4160         $/ = "\n";
4161         close $fd;
4162 }
4163
4164 sub git_blob {
4165         my $expires;
4166
4167         if (!defined $hash) {
4168                 if (defined $file_name) {
4169                         my $base = $hash_base || git_get_head_hash($project);
4170                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4171                                 or die_error(undef, "Error lookup file");
4172                 } else {
4173                         die_error(undef, "No file name defined");
4174                 }
4175         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4176                 # blobs defined by non-textual hash id's can be cached
4177                 $expires = "+1d";
4178         }
4179
4180         my ($have_blame) = gitweb_check_feature('blame');
4181         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4182                 or die_error(undef, "Couldn't cat $file_name, $hash");
4183         my $mimetype = blob_mimetype($fd, $file_name);
4184         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4185                 close $fd;
4186                 return git_blob_plain($mimetype);
4187         }
4188         # we can have blame only for text/* mimetype
4189         $have_blame &&= ($mimetype =~ m!^text/!);
4190
4191         git_header_html(undef, $expires);
4192         my $formats_nav = '';
4193         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4194                 if (defined $file_name) {
4195                         if ($have_blame) {
4196                                 $formats_nav .=
4197                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4198                                                                hash=>$hash, file_name=>$file_name)},
4199                                                 "blame") .
4200                                         " | ";
4201                         }
4202                         $formats_nav .=
4203                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4204                                                        hash=>$hash, file_name=>$file_name)},
4205                                         "history") .
4206                                 " | " .
4207                                 $cgi->a({-href => href(action=>"blob_plain",
4208                                                        hash=>$hash, file_name=>$file_name)},
4209                                         "raw") .
4210                                 " | " .
4211                                 $cgi->a({-href => href(action=>"blob",
4212                                                        hash_base=>"HEAD", file_name=>$file_name)},
4213                                         "HEAD");
4214                 } else {
4215                         $formats_nav .=
4216                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4217                 }
4218                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4219                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4220         } else {
4221                 print "<div class=\"page_nav\">\n" .
4222                       "<br/><br/></div>\n" .
4223                       "<div class=\"title\">$hash</div>\n";
4224         }
4225         git_print_page_path($file_name, "blob", $hash_base);
4226         print "<div class=\"page_body\">\n";
4227         if ($mimetype =~ m!^text/!) {
4228                 my $nr;
4229                 while (my $line = <$fd>) {
4230                         chomp $line;
4231                         $nr++;
4232                         $line = untabify($line);
4233                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4234                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4235                 }
4236         } elsif ($mimetype =~ m!^image/!) {
4237                 print qq!<img type="$mimetype"!;
4238                 if ($file_name) {
4239                         print qq! alt="$file_name" title="$file_name"!;
4240                 }
4241                 print qq! src="! .
4242                       href(action=>"blob_plain", hash=>$hash,
4243                            hash_base=>$hash_base, file_name=>$file_name) .
4244                       qq!" />\n!;
4245         }
4246         close $fd
4247                 or print "Reading blob failed.\n";
4248         print "</div>";
4249         git_footer_html();
4250 }
4251
4252 sub git_tree {
4253         if (!defined $hash_base) {
4254                 $hash_base = "HEAD";
4255         }
4256         if (!defined $hash) {
4257                 if (defined $file_name) {
4258                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4259                 } else {
4260                         $hash = $hash_base;
4261                 }
4262         }
4263         $/ = "\0";
4264         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4265                 or die_error(undef, "Open git-ls-tree failed");
4266         my @entries = map { chomp; $_ } <$fd>;
4267         close $fd or die_error(undef, "Reading tree failed");
4268         $/ = "\n";
4269
4270         my $refs = git_get_references();
4271         my $ref = format_ref_marker($refs, $hash_base);
4272         git_header_html();
4273         my $basedir = '';
4274         my ($have_blame) = gitweb_check_feature('blame');
4275         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4276                 my @views_nav = ();
4277                 if (defined $file_name) {
4278                         push @views_nav,
4279                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4280                                                        hash=>$hash, file_name=>$file_name)},
4281                                         "history"),
4282                                 $cgi->a({-href => href(action=>"tree",
4283                                                        hash_base=>"HEAD", file_name=>$file_name)},
4284                                         "HEAD"),
4285                 }
4286                 my $snapshot_links = format_snapshot_links($hash);
4287                 if (defined $snapshot_links) {
4288                         # FIXME: Should be available when we have no hash base as well.
4289                         push @views_nav, $snapshot_links;
4290                 }
4291                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4292                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4293         } else {
4294                 undef $hash_base;
4295                 print "<div class=\"page_nav\">\n";
4296                 print "<br/><br/></div>\n";
4297                 print "<div class=\"title\">$hash</div>\n";
4298         }
4299         if (defined $file_name) {
4300                 $basedir = $file_name;
4301                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4302                         $basedir .= '/';
4303                 }
4304         }
4305         git_print_page_path($file_name, 'tree', $hash_base);
4306         print "<div class=\"page_body\">\n";
4307         print "<table cellspacing=\"0\">\n";
4308         my $alternate = 1;
4309         # '..' (top directory) link if possible
4310         if (defined $hash_base &&
4311             defined $file_name && $file_name =~ m![^/]+$!) {
4312                 if ($alternate) {
4313                         print "<tr class=\"dark\">\n";
4314                 } else {
4315                         print "<tr class=\"light\">\n";
4316                 }
4317                 $alternate ^= 1;
4318
4319                 my $up = $file_name;
4320                 $up =~ s!/?[^/]+$!!;
4321                 undef $up unless $up;
4322                 # based on git_print_tree_entry
4323                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4324                 print '<td class="list">';
4325                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4326                                              file_name=>$up)},
4327                               "..");
4328                 print "</td>\n";
4329                 print "<td class=\"link\"></td>\n";
4330
4331                 print "</tr>\n";
4332         }
4333         foreach my $line (@entries) {
4334                 my %t = parse_ls_tree_line($line, -z => 1);
4335
4336                 if ($alternate) {
4337                         print "<tr class=\"dark\">\n";
4338                 } else {
4339                         print "<tr class=\"light\">\n";
4340                 }
4341                 $alternate ^= 1;
4342
4343                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4344
4345                 print "</tr>\n";
4346         }
4347         print "</table>\n" .
4348               "</div>";
4349         git_footer_html();
4350 }
4351
4352 sub git_snapshot {
4353         my @supported_fmts = gitweb_check_feature('snapshot');
4354         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4355
4356         my $format = $cgi->param('sf');
4357         if (!@supported_fmts) {
4358                 die_error('403 Permission denied', "Permission denied");
4359         }
4360         # default to first supported snapshot format
4361         $format ||= $supported_fmts[0];
4362         if ($format !~ m/^[a-z0-9]+$/) {
4363                 die_error(undef, "Invalid snapshot format parameter");
4364         } elsif (!exists($known_snapshot_formats{$format})) {
4365                 die_error(undef, "Unknown snapshot format");
4366         } elsif (!grep($_ eq $format, @supported_fmts)) {
4367                 die_error(undef, "Unsupported snapshot format");
4368         }
4369
4370         if (!defined $hash) {
4371                 $hash = git_get_head_hash($project);
4372         }
4373
4374         my $git_command = git_cmd_str();
4375         my $name = $project;
4376         $name =~ s,([^/])/*\.git$,$1,;
4377         $name = basename($name);
4378         my $filename = to_utf8($name);
4379         $name =~ s/\047/\047\\\047\047/g;
4380         my $cmd;
4381         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4382         $cmd = "$git_command archive " .
4383                 "--format=$known_snapshot_formats{$format}{'format'} " .
4384                 "--prefix=\'$name\'/ $hash";
4385         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4386                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4387         }
4388
4389         print $cgi->header(
4390                 -type => $known_snapshot_formats{$format}{'type'},
4391                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4392                 -status => '200 OK');
4393
4394         open my $fd, "-|", $cmd
4395                 or die_error(undef, "Execute git-archive failed");
4396         binmode STDOUT, ':raw';
4397         print <$fd>;
4398         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4399         close $fd;
4400 }
4401
4402 sub git_log {
4403         my $head = git_get_head_hash($project);
4404         if (!defined $hash) {
4405                 $hash = $head;
4406         }
4407         if (!defined $page) {
4408                 $page = 0;
4409         }
4410         my $refs = git_get_references();
4411
4412         my @commitlist = parse_commits($hash, 101, (100 * $page));
4413
4414         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4415
4416         git_header_html();
4417         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4418
4419         if (!@commitlist) {
4420                 my %co = parse_commit($hash);
4421
4422                 git_print_header_div('summary', $project);
4423                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4424         }
4425         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4426         for (my $i = 0; $i <= $to; $i++) {
4427                 my %co = %{$commitlist[$i]};
4428                 next if !%co;
4429                 my $commit = $co{'id'};
4430                 my $ref = format_ref_marker($refs, $commit);
4431                 my %ad = parse_date($co{'author_epoch'});
4432                 git_print_header_div('commit',
4433                                "<span class=\"age\">$co{'age_string'}</span>" .
4434                                esc_html($co{'title'}) . $ref,
4435                                $commit);
4436                 print "<div class=\"title_text\">\n" .
4437                       "<div class=\"log_link\">\n" .
4438                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4439                       " | " .
4440                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4441                       " | " .
4442                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4443                       "<br/>\n" .
4444                       "</div>\n" .
4445                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4446                       "</div>\n";
4447
4448                 print "<div class=\"log_body\">\n";
4449                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4450                 print "</div>\n";
4451         }
4452         if ($#commitlist >= 100) {
4453                 print "<div class=\"page_nav\">\n";
4454                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4455                                -accesskey => "n", -title => "Alt-n"}, "next");
4456                 print "</div>\n";
4457         }
4458         git_footer_html();
4459 }
4460
4461 sub git_commit {
4462         $hash ||= $hash_base || "HEAD";
4463         my %co = parse_commit($hash);
4464         if (!%co) {
4465                 die_error(undef, "Unknown commit object");
4466         }
4467         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4468         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4469
4470         my $parent  = $co{'parent'};
4471         my $parents = $co{'parents'}; # listref
4472
4473         # we need to prepare $formats_nav before any parameter munging
4474         my $formats_nav;
4475         if (!defined $parent) {
4476                 # --root commitdiff
4477                 $formats_nav .= '(initial)';
4478         } elsif (@$parents == 1) {
4479                 # single parent commit
4480                 $formats_nav .=
4481                         '(parent: ' .
4482                         $cgi->a({-href => href(action=>"commit",
4483                                                hash=>$parent)},
4484                                 esc_html(substr($parent, 0, 7))) .
4485                         ')';
4486         } else {
4487                 # merge commit
4488                 $formats_nav .=
4489                         '(merge: ' .
4490                         join(' ', map {
4491                                 $cgi->a({-href => href(action=>"commit",
4492                                                        hash=>$_)},
4493                                         esc_html(substr($_, 0, 7)));
4494                         } @$parents ) .
4495                         ')';
4496         }
4497
4498         if (!defined $parent) {
4499                 $parent = "--root";
4500         }
4501         my @difftree;
4502         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4503                 @diff_opts,
4504                 (@$parents <= 1 ? $parent : '-c'),
4505                 $hash, "--"
4506                 or die_error(undef, "Open git-diff-tree failed");
4507         @difftree = map { chomp; $_ } <$fd>;
4508         close $fd or die_error(undef, "Reading git-diff-tree failed");
4509
4510         # non-textual hash id's can be cached
4511         my $expires;
4512         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4513                 $expires = "+1d";
4514         }
4515         my $refs = git_get_references();
4516         my $ref = format_ref_marker($refs, $co{'id'});
4517
4518         git_header_html(undef, $expires);
4519         git_print_page_nav('commit', '',
4520                            $hash, $co{'tree'}, $hash,
4521                            $formats_nav);
4522
4523         if (defined $co{'parent'}) {
4524                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4525         } else {
4526                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4527         }
4528         print "<div class=\"title_text\">\n" .
4529               "<table cellspacing=\"0\">\n";
4530         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4531               "<tr>" .
4532               "<td></td><td> $ad{'rfc2822'}";
4533         if ($ad{'hour_local'} < 6) {
4534                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4535                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4536         } else {
4537                 printf(" (%02d:%02d %s)",
4538                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4539         }
4540         print "</td>" .
4541               "</tr>\n";
4542         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4543         print "<tr><td></td><td> $cd{'rfc2822'}" .
4544               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4545               "</td></tr>\n";
4546         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4547         print "<tr>" .
4548               "<td>tree</td>" .
4549               "<td class=\"sha1\">" .
4550               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4551                        class => "list"}, $co{'tree'}) .
4552               "</td>" .
4553               "<td class=\"link\">" .
4554               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4555                       "tree");
4556         my $snapshot_links = format_snapshot_links($hash);
4557         if (defined $snapshot_links) {
4558                 print " | " . $snapshot_links;
4559         }
4560         print "</td>" .
4561               "</tr>\n";
4562
4563         foreach my $par (@$parents) {
4564                 print "<tr>" .
4565                       "<td>parent</td>" .
4566                       "<td class=\"sha1\">" .
4567                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4568                                class => "list"}, $par) .
4569                       "</td>" .
4570                       "<td class=\"link\">" .
4571                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4572                       " | " .
4573                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4574                       "</td>" .
4575                       "</tr>\n";
4576         }
4577         print "</table>".
4578               "</div>\n";
4579
4580         print "<div class=\"page_body\">\n";
4581         git_print_log($co{'comment'});
4582         print "</div>\n";
4583
4584         git_difftree_body(\@difftree, $hash, @$parents);
4585
4586         git_footer_html();
4587 }
4588
4589 sub git_object {
4590         # object is defined by:
4591         # - hash or hash_base alone
4592         # - hash_base and file_name
4593         my $type;
4594
4595         # - hash or hash_base alone
4596         if ($hash || ($hash_base && !defined $file_name)) {
4597                 my $object_id = $hash || $hash_base;
4598
4599                 my $git_command = git_cmd_str();
4600                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4601                         or die_error('404 Not Found', "Object does not exist");
4602                 $type = <$fd>;
4603                 chomp $type;
4604                 close $fd
4605                         or die_error('404 Not Found', "Object does not exist");
4606
4607         # - hash_base and file_name
4608         } elsif ($hash_base && defined $file_name) {
4609                 $file_name =~ s,/+$,,;
4610
4611                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4612                         or die_error('404 Not Found', "Base object does not exist");
4613
4614                 # here errors should not hapen
4615                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4616                         or die_error(undef, "Open git-ls-tree failed");
4617                 my $line = <$fd>;
4618                 close $fd;
4619
4620                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4621                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4622                         die_error('404 Not Found', "File or directory for given base does not exist");
4623                 }
4624                 $type = $2;
4625                 $hash = $3;
4626         } else {
4627                 die_error('404 Not Found', "Not enough information to find object");
4628         }
4629
4630         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4631                                           hash=>$hash, hash_base=>$hash_base,
4632                                           file_name=>$file_name),
4633                              -status => '302 Found');
4634 }
4635
4636 sub git_blobdiff {
4637         my $format = shift || 'html';
4638
4639         my $fd;
4640         my @difftree;
4641         my %diffinfo;
4642         my $expires;
4643
4644         # preparing $fd and %diffinfo for git_patchset_body
4645         # new style URI
4646         if (defined $hash_base && defined $hash_parent_base) {
4647                 if (defined $file_name) {
4648                         # read raw output
4649                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4650                                 $hash_parent_base, $hash_base,
4651                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4652                                 or die_error(undef, "Open git-diff-tree failed");
4653                         @difftree = map { chomp; $_ } <$fd>;
4654                         close $fd
4655                                 or die_error(undef, "Reading git-diff-tree failed");
4656                         @difftree
4657                                 or die_error('404 Not Found', "Blob diff not found");
4658
4659                 } elsif (defined $hash &&
4660                          $hash =~ /[0-9a-fA-F]{40}/) {
4661                         # try to find filename from $hash
4662
4663                         # read filtered raw output
4664                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4665                                 $hash_parent_base, $hash_base, "--"
4666                                 or die_error(undef, "Open git-diff-tree failed");
4667                         @difftree =
4668                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4669                                 # $hash == to_id
4670                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4671                                 map { chomp; $_ } <$fd>;
4672                         close $fd
4673                                 or die_error(undef, "Reading git-diff-tree failed");
4674                         @difftree
4675                                 or die_error('404 Not Found', "Blob diff not found");
4676
4677                 } else {
4678                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4679                 }
4680
4681                 if (@difftree > 1) {
4682                         die_error('404 Not Found', "Ambiguous blob diff specification");
4683                 }
4684
4685                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4686                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4687                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4688
4689                 $hash_parent ||= $diffinfo{'from_id'};
4690                 $hash        ||= $diffinfo{'to_id'};
4691
4692                 # non-textual hash id's can be cached
4693                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4694                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4695                         $expires = '+1d';
4696                 }
4697
4698                 # open patch output
4699                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4700                         '-p', ($format eq 'html' ? "--full-index" : ()),
4701                         $hash_parent_base, $hash_base,
4702                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4703                         or die_error(undef, "Open git-diff-tree failed");
4704         }
4705
4706         # old/legacy style URI
4707         if (!%diffinfo && # if new style URI failed
4708             defined $hash && defined $hash_parent) {
4709                 # fake git-diff-tree raw output
4710                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4711                 $diffinfo{'from_id'} = $hash_parent;
4712                 $diffinfo{'to_id'}   = $hash;
4713                 if (defined $file_name) {
4714                         if (defined $file_parent) {
4715                                 $diffinfo{'status'} = '2';
4716                                 $diffinfo{'from_file'} = $file_parent;
4717                                 $diffinfo{'to_file'}   = $file_name;
4718                         } else { # assume not renamed
4719                                 $diffinfo{'status'} = '1';
4720                                 $diffinfo{'from_file'} = $file_name;
4721                                 $diffinfo{'to_file'}   = $file_name;
4722                         }
4723                 } else { # no filename given
4724                         $diffinfo{'status'} = '2';
4725                         $diffinfo{'from_file'} = $hash_parent;
4726                         $diffinfo{'to_file'}   = $hash;
4727                 }
4728
4729                 # non-textual hash id's can be cached
4730                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4731                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4732                         $expires = '+1d';
4733                 }
4734
4735                 # open patch output
4736                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4737                         '-p', ($format eq 'html' ? "--full-index" : ()),
4738                         $hash_parent, $hash, "--"
4739                         or die_error(undef, "Open git-diff failed");
4740         } else  {
4741                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4742                         unless %diffinfo;
4743         }
4744
4745         # header
4746         if ($format eq 'html') {
4747                 my $formats_nav =
4748                         $cgi->a({-href => href(action=>"blobdiff_plain",
4749                                                hash=>$hash, hash_parent=>$hash_parent,
4750                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4751                                                file_name=>$file_name, file_parent=>$file_parent)},
4752                                 "raw");
4753                 git_header_html(undef, $expires);
4754                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4755                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4756                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4757                 } else {
4758                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4759                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4760                 }
4761                 if (defined $file_name) {
4762                         git_print_page_path($file_name, "blob", $hash_base);
4763                 } else {
4764                         print "<div class=\"page_path\"></div>\n";
4765                 }
4766
4767         } elsif ($format eq 'plain') {
4768                 print $cgi->header(
4769                         -type => 'text/plain',
4770                         -charset => 'utf-8',
4771                         -expires => $expires,
4772                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4773
4774                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4775
4776         } else {
4777                 die_error(undef, "Unknown blobdiff format");
4778         }
4779
4780         # patch
4781         if ($format eq 'html') {
4782                 print "<div class=\"page_body\">\n";
4783
4784                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4785                 close $fd;
4786
4787                 print "</div>\n"; # class="page_body"
4788                 git_footer_html();
4789
4790         } else {
4791                 while (my $line = <$fd>) {
4792                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4793                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4794
4795                         print $line;
4796
4797                         last if $line =~ m!^\+\+\+!;
4798                 }
4799                 local $/ = undef;
4800                 print <$fd>;
4801                 close $fd;
4802         }
4803 }
4804
4805 sub git_blobdiff_plain {
4806         git_blobdiff('plain');
4807 }
4808
4809 sub git_commitdiff {
4810         my $format = shift || 'html';
4811         $hash ||= $hash_base || "HEAD";
4812         my %co = parse_commit($hash);
4813         if (!%co) {
4814                 die_error(undef, "Unknown commit object");
4815         }
4816
4817         # choose format for commitdiff for merge
4818         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4819                 $hash_parent = '--cc';
4820         }
4821         # we need to prepare $formats_nav before almost any parameter munging
4822         my $formats_nav;
4823         if ($format eq 'html') {
4824                 $formats_nav =
4825                         $cgi->a({-href => href(action=>"commitdiff_plain",
4826                                                hash=>$hash, hash_parent=>$hash_parent)},
4827                                 "raw");
4828
4829                 if (defined $hash_parent &&
4830                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4831                         # commitdiff with two commits given
4832                         my $hash_parent_short = $hash_parent;
4833                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4834                                 $hash_parent_short = substr($hash_parent, 0, 7);
4835                         }
4836                         $formats_nav .=
4837                                 ' (from';
4838                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4839                                 if ($co{'parents'}[$i] eq $hash_parent) {
4840                                         $formats_nav .= ' parent ' . ($i+1);
4841                                         last;
4842                                 }
4843                         }
4844                         $formats_nav .= ': ' .
4845                                 $cgi->a({-href => href(action=>"commitdiff",
4846                                                        hash=>$hash_parent)},
4847                                         esc_html($hash_parent_short)) .
4848                                 ')';
4849                 } elsif (!$co{'parent'}) {
4850                         # --root commitdiff
4851                         $formats_nav .= ' (initial)';
4852                 } elsif (scalar @{$co{'parents'}} == 1) {
4853                         # single parent commit
4854                         $formats_nav .=
4855                                 ' (parent: ' .
4856                                 $cgi->a({-href => href(action=>"commitdiff",
4857                                                        hash=>$co{'parent'})},
4858                                         esc_html(substr($co{'parent'}, 0, 7))) .
4859                                 ')';
4860                 } else {
4861                         # merge commit
4862                         if ($hash_parent eq '--cc') {
4863                                 $formats_nav .= ' | ' .
4864                                         $cgi->a({-href => href(action=>"commitdiff",
4865                                                                hash=>$hash, hash_parent=>'-c')},
4866                                                 'combined');
4867                         } else { # $hash_parent eq '-c'
4868                                 $formats_nav .= ' | ' .
4869                                         $cgi->a({-href => href(action=>"commitdiff",
4870                                                                hash=>$hash, hash_parent=>'--cc')},
4871                                                 'compact');
4872                         }
4873                         $formats_nav .=
4874                                 ' (merge: ' .
4875                                 join(' ', map {
4876                                         $cgi->a({-href => href(action=>"commitdiff",
4877                                                                hash=>$_)},
4878                                                 esc_html(substr($_, 0, 7)));
4879                                 } @{$co{'parents'}} ) .
4880                                 ')';
4881                 }
4882         }
4883
4884         my $hash_parent_param = $hash_parent;
4885         if (!defined $hash_parent_param) {
4886                 # --cc for multiple parents, --root for parentless
4887                 $hash_parent_param =
4888                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4889         }
4890
4891         # read commitdiff
4892         my $fd;
4893         my @difftree;
4894         if ($format eq 'html') {
4895                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4896                         "--no-commit-id", "--patch-with-raw", "--full-index",
4897                         $hash_parent_param, $hash, "--"
4898                         or die_error(undef, "Open git-diff-tree failed");
4899
4900                 while (my $line = <$fd>) {
4901                         chomp $line;
4902                         # empty line ends raw part of diff-tree output
4903                         last unless $line;
4904                         push @difftree, scalar parse_difftree_raw_line($line);
4905                 }
4906
4907         } elsif ($format eq 'plain') {
4908                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4909                         '-p', $hash_parent_param, $hash, "--"
4910                         or die_error(undef, "Open git-diff-tree failed");
4911
4912         } else {
4913                 die_error(undef, "Unknown commitdiff format");
4914         }
4915
4916         # non-textual hash id's can be cached
4917         my $expires;
4918         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4919                 $expires = "+1d";
4920         }
4921
4922         # write commit message
4923         if ($format eq 'html') {
4924                 my $refs = git_get_references();
4925                 my $ref = format_ref_marker($refs, $co{'id'});
4926
4927                 git_header_html(undef, $expires);
4928                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4929                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4930                 git_print_authorship(\%co);
4931                 print "<div class=\"page_body\">\n";
4932                 if (@{$co{'comment'}} > 1) {
4933                         print "<div class=\"log\">\n";
4934                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4935                         print "</div>\n"; # class="log"
4936                 }
4937
4938         } elsif ($format eq 'plain') {
4939                 my $refs = git_get_references("tags");
4940                 my $tagname = git_get_rev_name_tags($hash);
4941                 my $filename = basename($project) . "-$hash.patch";
4942
4943                 print $cgi->header(
4944                         -type => 'text/plain',
4945                         -charset => 'utf-8',
4946                         -expires => $expires,
4947                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4948                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4949                 print <<TEXT;
4950 From: $co{'author'}
4951 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4952 Subject: $co{'title'}
4953 TEXT
4954                 print "X-Git-Tag: $tagname\n" if $tagname;
4955                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4956
4957                 foreach my $line (@{$co{'comment'}}) {
4958                         print "$line\n";
4959                 }
4960                 print "---\n\n";
4961         }
4962
4963         # write patch
4964         if ($format eq 'html') {
4965                 my $use_parents = !defined $hash_parent ||
4966                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4967                 git_difftree_body(\@difftree, $hash,
4968                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4969                 print "<br/>\n";
4970
4971                 git_patchset_body($fd, \@difftree, $hash,
4972                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4973                 close $fd;
4974                 print "</div>\n"; # class="page_body"
4975                 git_footer_html();
4976
4977         } elsif ($format eq 'plain') {
4978                 local $/ = undef;
4979                 print <$fd>;
4980                 close $fd
4981                         or print "Reading git-diff-tree failed\n";
4982         }
4983 }
4984
4985 sub git_commitdiff_plain {
4986         git_commitdiff('plain');
4987 }
4988
4989 sub git_history {
4990         if (!defined $hash_base) {
4991                 $hash_base = git_get_head_hash($project);
4992         }
4993         if (!defined $page) {
4994                 $page = 0;
4995         }
4996         my $ftype;
4997         my %co = parse_commit($hash_base);
4998         if (!%co) {
4999                 die_error(undef, "Unknown commit object");
5000         }
5001
5002         my $refs = git_get_references();
5003         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5004
5005         if (!defined $hash && defined $file_name) {
5006                 $hash = git_get_hash_by_path($hash_base, $file_name);
5007         }
5008         if (defined $hash) {
5009                 $ftype = git_get_type($hash);
5010         }
5011
5012         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5013
5014         my $paging_nav = '';
5015         if ($page > 0) {
5016                 $paging_nav .=
5017                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5018                                                file_name=>$file_name)},
5019                                 "first");
5020                 $paging_nav .= " &sdot; " .
5021                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5022                                                file_name=>$file_name, page=>$page-1),
5023                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5024         } else {
5025                 $paging_nav .= "first";
5026                 $paging_nav .= " &sdot; prev";
5027         }
5028         if ($#commitlist >= 100) {
5029                 $paging_nav .= " &sdot; " .
5030                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5031                                                file_name=>$file_name, page=>$page+1),
5032                                  -accesskey => "n", -title => "Alt-n"}, "next");
5033         } else {
5034                 $paging_nav .= " &sdot; next";
5035         }
5036         my $next_link = '';
5037         if ($#commitlist >= 100) {
5038                 $next_link =
5039                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5040                                                file_name=>$file_name, page=>$page+1),
5041                                  -accesskey => "n", -title => "Alt-n"}, "next");
5042         }
5043
5044         git_header_html();
5045         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5046         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5047         git_print_page_path($file_name, $ftype, $hash_base);
5048
5049         git_history_body(\@commitlist, 0, 99,
5050                          $refs, $hash_base, $ftype, $next_link);
5051
5052         git_footer_html();
5053 }
5054
5055 sub git_search {
5056         my ($have_search) = gitweb_check_feature('search');
5057         if (!$have_search) {
5058                 die_error('403 Permission denied', "Permission denied");
5059         }
5060         if (!defined $searchtext) {
5061                 die_error(undef, "Text field empty");
5062         }
5063         if (!defined $hash) {
5064                 $hash = git_get_head_hash($project);
5065         }
5066         my %co = parse_commit($hash);
5067         if (!%co) {
5068                 die_error(undef, "Unknown commit object");
5069         }
5070         if (!defined $page) {
5071                 $page = 0;
5072         }
5073
5074         $searchtype ||= 'commit';
5075         if ($searchtype eq 'pickaxe') {
5076                 # pickaxe may take all resources of your box and run for several minutes
5077                 # with every query - so decide by yourself how public you make this feature
5078                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5079                 if (!$have_pickaxe) {
5080                         die_error('403 Permission denied', "Permission denied");
5081                 }
5082         }
5083         if ($searchtype eq 'grep') {
5084                 my ($have_grep) = gitweb_check_feature('grep');
5085                 if (!$have_grep) {
5086                         die_error('403 Permission denied', "Permission denied");
5087                 }
5088         }
5089
5090         git_header_html();
5091
5092         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5093                 my $greptype;
5094                 if ($searchtype eq 'commit') {
5095                         $greptype = "--grep=";
5096                 } elsif ($searchtype eq 'author') {
5097                         $greptype = "--author=";
5098                 } elsif ($searchtype eq 'committer') {
5099                         $greptype = "--committer=";
5100                 }
5101                 $greptype .= $search_regexp;
5102                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5103
5104                 my $paging_nav = '';
5105                 if ($page > 0) {
5106                         $paging_nav .=
5107                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5108                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5109                                         "first");
5110                         $paging_nav .= " &sdot; " .
5111                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5112                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5113                                                        page=>$page-1),
5114                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5115                 } else {
5116                         $paging_nav .= "first";
5117                         $paging_nav .= " &sdot; prev";
5118                 }
5119                 if ($#commitlist >= 100) {
5120                         $paging_nav .= " &sdot; " .
5121                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5122                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5123                                                        page=>$page+1),
5124                                          -accesskey => "n", -title => "Alt-n"}, "next");
5125                 } else {
5126                         $paging_nav .= " &sdot; next";
5127                 }
5128                 my $next_link = '';
5129                 if ($#commitlist >= 100) {
5130                         $next_link =
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                 }
5136
5137                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5138                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5139                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5140         }
5141
5142         if ($searchtype eq 'pickaxe') {
5143                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5144                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5145
5146                 print "<table cellspacing=\"0\">\n";
5147                 my $alternate = 1;
5148                 $/ = "\n";
5149                 my $git_command = git_cmd_str();
5150                 my $searchqtext = $searchtext;
5151                 $searchqtext =~ s/'/'\\''/;
5152                 open my $fd, "-|", "$git_command rev-list $hash | " .
5153                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5154                 undef %co;
5155                 my @files;
5156                 while (my $line = <$fd>) {
5157                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5158                                 my %set;
5159                                 $set{'file'} = $6;
5160                                 $set{'from_id'} = $3;
5161                                 $set{'to_id'} = $4;
5162                                 $set{'id'} = $set{'to_id'};
5163                                 if ($set{'id'} =~ m/0{40}/) {
5164                                         $set{'id'} = $set{'from_id'};
5165                                 }
5166                                 if ($set{'id'} =~ m/0{40}/) {
5167                                         next;
5168                                 }
5169                                 push @files, \%set;
5170                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5171                                 if (%co) {
5172                                         if ($alternate) {
5173                                                 print "<tr class=\"dark\">\n";
5174                                         } else {
5175                                                 print "<tr class=\"light\">\n";
5176                                         }
5177                                         $alternate ^= 1;
5178                                         my $author = chop_str($co{'author_name'}, 15, 5);
5179                                         if ($author ne $co{'author_name'}) {
5180                                                 $author = "<span title=\"" . esc_html($co{'author_name'}) . "\">" . esc_html($author) . "</span>";
5181                                         } else {
5182                                                 $author = esc_html($author);
5183                                         }
5184                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5185                                               "<td><i>" . $author . "</i></td>\n" .
5186                                               "<td>" .
5187                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5188                                                       -class => "list subject"},
5189                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5190                                         while (my $setref = shift @files) {
5191                                                 my %set = %$setref;
5192                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5193                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5194                                                               -class => "list"},
5195                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5196                                                       "<br/>\n";
5197                                         }
5198                                         print "</td>\n" .
5199                                               "<td class=\"link\">" .
5200                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5201                                               " | " .
5202                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5203                                         print "</td>\n" .
5204                                               "</tr>\n";
5205                                 }
5206                                 %co = parse_commit($1);
5207                         }
5208                 }
5209                 close $fd;
5210
5211                 print "</table>\n";
5212         }
5213
5214         if ($searchtype eq 'grep') {
5215                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5216                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5217
5218                 print "<table cellspacing=\"0\">\n";
5219                 my $alternate = 1;
5220                 my $matches = 0;
5221                 $/ = "\n";
5222                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5223                 my $lastfile = '';
5224                 while (my $line = <$fd>) {
5225                         chomp $line;
5226                         my ($file, $lno, $ltext, $binary);
5227                         last if ($matches++ > 1000);
5228                         if ($line =~ /^Binary file (.+) matches$/) {
5229                                 $file = $1;
5230                                 $binary = 1;
5231                         } else {
5232                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5233                         }
5234                         if ($file ne $lastfile) {
5235                                 $lastfile and print "</td></tr>\n";
5236                                 if ($alternate++) {
5237                                         print "<tr class=\"dark\">\n";
5238                                 } else {
5239                                         print "<tr class=\"light\">\n";
5240                                 }
5241                                 print "<td class=\"list\">".
5242                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5243                                                                file_name=>"$file"),
5244                                                 -class => "list"}, esc_path($file));
5245                                 print "</td><td>\n";
5246                                 $lastfile = $file;
5247                         }
5248                         if ($binary) {
5249                                 print "<div class=\"binary\">Binary file</div>\n";
5250                         } else {
5251                                 $ltext = untabify($ltext);
5252                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5253                                         $ltext = esc_html($1, -nbsp=>1);
5254                                         $ltext .= '<span class="match">';
5255                                         $ltext .= esc_html($2, -nbsp=>1);
5256                                         $ltext .= '</span>';
5257                                         $ltext .= esc_html($3, -nbsp=>1);
5258                                 } else {
5259                                         $ltext = esc_html($ltext, -nbsp=>1);
5260                                 }
5261                                 print "<div class=\"pre\">" .
5262                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5263                                                                file_name=>"$file").'#l'.$lno,
5264                                                 -class => "linenr"}, sprintf('%4i', $lno))
5265                                         . ' ' .  $ltext . "</div>\n";
5266                         }
5267                 }
5268                 if ($lastfile) {
5269                         print "</td></tr>\n";
5270                         if ($matches > 1000) {
5271                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5272                         }
5273                 } else {
5274                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5275                 }
5276                 close $fd;
5277
5278                 print "</table>\n";
5279         }
5280         git_footer_html();
5281 }
5282
5283 sub git_search_help {
5284         git_header_html();
5285         git_print_page_nav('','', $hash,$hash,$hash);
5286         print <<EOT;
5287 <dl>
5288 <dt><b>commit</b></dt>
5289 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5290 EOT
5291         my ($have_grep) = gitweb_check_feature('grep');
5292         if ($have_grep) {
5293                 print <<EOT;
5294 <dt><b>grep</b></dt>
5295 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5296     a different one) are searched for the given
5297 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5298 (POSIX extended) and the matches are listed. On large
5299 trees, this search can take a while and put some strain on the server, so please use it with
5300 some consideration.</dd>
5301 EOT
5302         }
5303         print <<EOT;
5304 <dt><b>author</b></dt>
5305 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5306 <dt><b>committer</b></dt>
5307 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5308 EOT
5309         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5310         if ($have_pickaxe) {
5311                 print <<EOT;
5312 <dt><b>pickaxe</b></dt>
5313 <dd>All commits that caused the string to appear or disappear from any file (changes that
5314 added, removed or "modified" the string) will be listed. This search can take a while and
5315 takes a lot of strain on the server, so please use it wisely.</dd>
5316 EOT
5317         }
5318         print "</dl>\n";
5319         git_footer_html();
5320 }
5321
5322 sub git_shortlog {
5323         my $head = git_get_head_hash($project);
5324         if (!defined $hash) {
5325                 $hash = $head;
5326         }
5327         if (!defined $page) {
5328                 $page = 0;
5329         }
5330         my $refs = git_get_references();
5331
5332         my @commitlist = parse_commits($hash, 101, (100 * $page));
5333
5334         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5335         my $next_link = '';
5336         if ($#commitlist >= 100) {
5337                 $next_link =
5338                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5339                                  -accesskey => "n", -title => "Alt-n"}, "next");
5340         }
5341
5342         git_header_html();
5343         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5344         git_print_header_div('summary', $project);
5345
5346         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5347
5348         git_footer_html();
5349 }
5350
5351 ## ......................................................................
5352 ## feeds (RSS, Atom; OPML)
5353
5354 sub git_feed {
5355         my $format = shift || 'atom';
5356         my ($have_blame) = gitweb_check_feature('blame');
5357
5358         # Atom: http://www.atomenabled.org/developers/syndication/
5359         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5360         if ($format ne 'rss' && $format ne 'atom') {
5361                 die_error(undef, "Unknown web feed format");
5362         }
5363
5364         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5365         my $head = $hash || 'HEAD';
5366         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5367
5368         my %latest_commit;
5369         my %latest_date;
5370         my $content_type = "application/$format+xml";
5371         if (defined $cgi->http('HTTP_ACCEPT') &&
5372                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5373                 # browser (feed reader) prefers text/xml
5374                 $content_type = 'text/xml';
5375         }
5376         if (defined($commitlist[0])) {
5377                 %latest_commit = %{$commitlist[0]};
5378                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5379                 print $cgi->header(
5380                         -type => $content_type,
5381                         -charset => 'utf-8',
5382                         -last_modified => $latest_date{'rfc2822'});
5383         } else {
5384                 print $cgi->header(
5385                         -type => $content_type,
5386                         -charset => 'utf-8');
5387         }
5388
5389         # Optimization: skip generating the body if client asks only
5390         # for Last-Modified date.
5391         return if ($cgi->request_method() eq 'HEAD');
5392
5393         # header variables
5394         my $title = "$site_name - $project/$action";
5395         my $feed_type = 'log';
5396         if (defined $hash) {
5397                 $title .= " - '$hash'";
5398                 $feed_type = 'branch log';
5399                 if (defined $file_name) {
5400                         $title .= " :: $file_name";
5401                         $feed_type = 'history';
5402                 }
5403         } elsif (defined $file_name) {
5404                 $title .= " - $file_name";
5405                 $feed_type = 'history';
5406         }
5407         $title .= " $feed_type";
5408         my $descr = git_get_project_description($project);
5409         if (defined $descr) {
5410                 $descr = esc_html($descr);
5411         } else {
5412                 $descr = "$project " .
5413                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5414                          " feed";
5415         }
5416         my $owner = git_get_project_owner($project);
5417         $owner = esc_html($owner);
5418
5419         #header
5420         my $alt_url;
5421         if (defined $file_name) {
5422                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5423         } elsif (defined $hash) {
5424                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5425         } else {
5426                 $alt_url = href(-full=>1, action=>"summary");
5427         }
5428         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5429         if ($format eq 'rss') {
5430                 print <<XML;
5431 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5432 <channel>
5433 XML
5434                 print "<title>$title</title>\n" .
5435                       "<link>$alt_url</link>\n" .
5436                       "<description>$descr</description>\n" .
5437                       "<language>en</language>\n";
5438         } elsif ($format eq 'atom') {
5439                 print <<XML;
5440 <feed xmlns="http://www.w3.org/2005/Atom">
5441 XML
5442                 print "<title>$title</title>\n" .
5443                       "<subtitle>$descr</subtitle>\n" .
5444                       '<link rel="alternate" type="text/html" href="' .
5445                       $alt_url . '" />' . "\n" .
5446                       '<link rel="self" type="' . $content_type . '" href="' .
5447                       $cgi->self_url() . '" />' . "\n" .
5448                       "<id>" . href(-full=>1) . "</id>\n" .
5449                       # use project owner for feed author
5450                       "<author><name>$owner</name></author>\n";
5451                 if (defined $favicon) {
5452                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5453                 }
5454                 if (defined $logo_url) {
5455                         # not twice as wide as tall: 72 x 27 pixels
5456                         print "<logo>" . esc_url($logo) . "</logo>\n";
5457                 }
5458                 if (! %latest_date) {
5459                         # dummy date to keep the feed valid until commits trickle in:
5460                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5461                 } else {
5462                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5463                 }
5464         }
5465
5466         # contents
5467         for (my $i = 0; $i <= $#commitlist; $i++) {
5468                 my %co = %{$commitlist[$i]};
5469                 my $commit = $co{'id'};
5470                 # we read 150, we always show 30 and the ones more recent than 48 hours
5471                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5472                         last;
5473                 }
5474                 my %cd = parse_date($co{'author_epoch'});
5475
5476                 # get list of changed files
5477                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5478                         $co{'parent'} || "--root",
5479                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5480                         or next;
5481                 my @difftree = map { chomp; $_ } <$fd>;
5482                 close $fd
5483                         or next;
5484
5485                 # print element (entry, item)
5486                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5487                 if ($format eq 'rss') {
5488                         print "<item>\n" .
5489                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5490                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5491                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5492                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5493                               "<link>$co_url</link>\n" .
5494                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5495                               "<content:encoded>" .
5496                               "<![CDATA[\n";
5497                 } elsif ($format eq 'atom') {
5498                         print "<entry>\n" .
5499                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5500                               "<updated>$cd{'iso-8601'}</updated>\n" .
5501                               "<author>\n" .
5502                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5503                         if ($co{'author_email'}) {
5504                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5505                         }
5506                         print "</author>\n" .
5507                               # use committer for contributor
5508                               "<contributor>\n" .
5509                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5510                         if ($co{'committer_email'}) {
5511                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5512                         }
5513                         print "</contributor>\n" .
5514                               "<published>$cd{'iso-8601'}</published>\n" .
5515                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5516                               "<id>$co_url</id>\n" .
5517                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5518                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5519                 }
5520                 my $comment = $co{'comment'};
5521                 print "<pre>\n";
5522                 foreach my $line (@$comment) {
5523                         $line = esc_html($line);
5524                         print "$line\n";
5525                 }
5526                 print "</pre><ul>\n";
5527                 foreach my $difftree_line (@difftree) {
5528                         my %difftree = parse_difftree_raw_line($difftree_line);
5529                         next if !$difftree{'from_id'};
5530
5531                         my $file = $difftree{'file'} || $difftree{'to_file'};
5532
5533                         print "<li>" .
5534                               "[" .
5535                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5536                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5537                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5538                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5539                                       -title => "diff"}, 'D');
5540                         if ($have_blame) {
5541                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5542                                                              file_name=>$file, hash_base=>$commit),
5543                                               -title => "blame"}, 'B');
5544                         }
5545                         # if this is not a feed of a file history
5546                         if (!defined $file_name || $file_name ne $file) {
5547                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5548                                                              file_name=>$file, hash=>$commit),
5549                                               -title => "history"}, 'H');
5550                         }
5551                         $file = esc_path($file);
5552                         print "] ".
5553                               "$file</li>\n";
5554                 }
5555                 if ($format eq 'rss') {
5556                         print "</ul>]]>\n" .
5557                               "</content:encoded>\n" .
5558                               "</item>\n";
5559                 } elsif ($format eq 'atom') {
5560                         print "</ul>\n</div>\n" .
5561                               "</content>\n" .
5562                               "</entry>\n";
5563                 }
5564         }
5565
5566         # end of feed
5567         if ($format eq 'rss') {
5568                 print "</channel>\n</rss>\n";
5569         }       elsif ($format eq 'atom') {
5570                 print "</feed>\n";
5571         }
5572 }
5573
5574 sub git_rss {
5575         git_feed('rss');
5576 }
5577
5578 sub git_atom {
5579         git_feed('atom');
5580 }
5581
5582 sub git_opml {
5583         my @list = git_get_projects_list();
5584
5585         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5586         print <<XML;
5587 <?xml version="1.0" encoding="utf-8"?>
5588 <opml version="1.0">
5589 <head>
5590   <title>$site_name OPML Export</title>
5591 </head>
5592 <body>
5593 <outline text="git RSS feeds">
5594 XML
5595
5596         foreach my $pr (@list) {
5597                 my %proj = %$pr;
5598                 my $head = git_get_head_hash($proj{'path'});
5599                 if (!defined $head) {
5600                         next;
5601                 }
5602                 $git_dir = "$projectroot/$proj{'path'}";
5603                 my %co = parse_commit($head);
5604                 if (!%co) {
5605                         next;
5606                 }
5607
5608                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5609                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5610                 my $html = "$my_url?p=$proj{'path'};a=summary";
5611                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5612         }
5613         print <<XML;
5614 </outline>
5615 </body>
5616 </opml>
5617 XML
5618 }