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 $search_use_regexp = $cgi->param('sr');
 476
 477 our $searchtext = $cgi->param('s');
 478 our $search_regexp;
 479 if (defined $searchtext) {
 480         if (length($searchtext) < 2) {
 481                 die_error(undef, "At least two characters are required for search parameter");
 482         }
 483         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 484 }
 485
 486 # now read PATH_INFO and use it as alternative to parameters
 487 sub evaluate_path_info {
 488         return if defined $project;
 489         my $path_info = $ENV{"PATH_INFO"};
 490         return if !$path_info;
 491         $path_info =~ s,^/+,,;
 492         return if !$path_info;
 493         # find which part of PATH_INFO is project
 494         $project = $path_info;
 495         $project =~ s,/+$,,;
 496         while ($project && !check_head_link("$projectroot/$project")) {
 497                 $project =~ s,/*[^/]*$,,;
 498         }
 499         # validate project
 500         $project = validate_pathname($project);
 501         if (!$project ||
 502             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 503             ($strict_export && !project_in_list($project))) {
 504                 undef $project;
 505                 return;
 506         }
 507         # do not change any parameters if an action is given using the query string
 508         return if $action;
 509         $path_info =~ s,^$project/*,,;
 510         my ($refname, $pathname) = split(/:/, $path_info, 2);
 511         if (defined $pathname) {
 512                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 513                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 514                 $pathname =~ s,^/+,,;
 515                 if (!$pathname || substr($pathname, -1) eq "/") {
 516                         $action  ||= "tree";
 517                         $pathname =~ s,/$,,;
 518                 } else {
 519                         $action  ||= "blob_plain";
 520                 }
 521                 $hash_base ||= validate_refname($refname);
 522                 $file_name ||= validate_pathname($pathname);
 523         } elsif (defined $refname) {
 524                 # we got "project.git/branch"
 525                 $action ||= "shortlog";
 526                 $hash   ||= validate_refname($refname);
 527         }
 528 }
 529 evaluate_path_info();
 530
 531 # path to the current git repository
 532 our $git_dir;
 533 $git_dir = "$projectroot/$project" if $project;
 534
 535 # dispatch
 536 my %actions = (
 537         "blame" => \&git_blame2,
 538         "blobdiff" => \&git_blobdiff,
 539         "blobdiff_plain" => \&git_blobdiff_plain,
 540         "blob" => \&git_blob,
 541         "blob_plain" => \&git_blob_plain,
 542         "commitdiff" => \&git_commitdiff,
 543         "commitdiff_plain" => \&git_commitdiff_plain,
 544         "commit" => \&git_commit,
 545         "forks" => \&git_forks,
 546         "heads" => \&git_heads,
 547         "history" => \&git_history,
 548         "log" => \&git_log,
 549         "rss" => \&git_rss,
 550         "atom" => \&git_atom,
 551         "search" => \&git_search,
 552         "search_help" => \&git_search_help,
 553         "shortlog" => \&git_shortlog,
 554         "summary" => \&git_summary,
 555         "tag" => \&git_tag,
 556         "tags" => \&git_tags,
 557         "tree" => \&git_tree,
 558         "snapshot" => \&git_snapshot,
 559         "object" => \&git_object,
 560         # those below don't need $project
 561         "opml" => \&git_opml,
 562         "project_list" => \&git_project_list,
 563         "project_index" => \&git_project_index,
 564 );
 565
 566 if (!defined $action) {
 567         if (defined $hash) {
 568                 $action = git_get_type($hash);
 569         } elsif (defined $hash_base && defined $file_name) {
 570                 $action = git_get_type("$hash_base:$file_name");
 571         } elsif (defined $project) {
 572                 $action = 'summary';
 573         } else {
 574                 $action = 'project_list';
 575         }
 576 }
 577 if (!defined($actions{$action})) {
 578         die_error(undef, "Unknown action");
 579 }
 580 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 581     !$project) {
 582         die_error(undef, "Project needed");
 583 }
 584 $actions{$action}->();
 585 exit;
 586
 587 ## ======================================================================
 588 ## action links
 589
 590 sub href(%) {
 591         my %params = @_;
 592         # default is to use -absolute url() i.e. $my_uri
 593         my $href = $params{-full} ? $my_url : $my_uri;
 594
 595         # XXX: Warning: If you touch this, check the search form for updating,
 596         # too.
 597
 598         my @mapping = (
 599                 project => "p",
 600                 action => "a",
 601                 file_name => "f",
 602                 file_parent => "fp",
 603                 hash => "h",
 604                 hash_parent => "hp",
 605                 hash_base => "hb",
 606                 hash_parent_base => "hpb",
 607                 page => "pg",
 608                 order => "o",
 609                 searchtext => "s",
 610                 searchtype => "st",
 611                 snapshot_format => "sf",
 612                 extra_options => "opt",
 613                 search_use_regexp => "sr",
 614         );
 615         my %mapping = @mapping;
 616
 617         $params{'project'} = $project unless exists $params{'project'};
 618
 619         if ($params{-replay}) {
 620                 while (my ($name, $symbol) = each %mapping) {
 621                         if (!exists $params{$name}) {
 622                                 # to allow for multivalued params we use arrayref form
 623                                 $params{$name} = [ $cgi->param($symbol) ];
 624                         }
 625                 }
 626         }
 627
 628         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 629         if ($use_pathinfo) {
 630                 # use PATH_INFO for project name
 631                 $href .= "/$params{'project'}" if defined $params{'project'};
 632                 delete $params{'project'};
 633
 634                 # Summary just uses the project path URL
 635                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 636                         delete $params{'action'};
 637                 }
 638         }
 639
 640         # now encode the parameters explicitly
 641         my @result = ();
 642         for (my $i = 0; $i < @mapping; $i += 2) {
 643                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 644                 if (defined $params{$name}) {
 645                         if (ref($params{$name}) eq "ARRAY") {
 646                                 foreach my $par (@{$params{$name}}) {
 647                                         push @result, $symbol . "=" . esc_param($par);
 648                                 }
 649                         } else {
 650                                 push @result, $symbol . "=" . esc_param($params{$name});
 651                         }
 652                 }
 653         }
 654         $href .= "?" . join(';', @result) if scalar @result;
 655
 656         return $href;
 657 }
 658
 659
 660 ## ======================================================================
 661 ## validation, quoting/unquoting and escaping
 662
 663 sub validate_pathname {
 664         my $input = shift || return undef;
 665
 666         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 667         # at the beginning, at the end, and between slashes.
 668         # also this catches doubled slashes
 669         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 670                 return undef;
 671         }
 672         # no null characters
 673         if ($input =~ m!\0!) {
 674                 return undef;
 675         }
 676         return $input;
 677 }
 678
 679 sub validate_refname {
 680         my $input = shift || return undef;
 681
 682         # textual hashes are O.K.
 683         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 684                 return $input;
 685         }
 686         # it must be correct pathname
 687         $input = validate_pathname($input)
 688                 or return undef;
 689         # restrictions on ref name according to git-check-ref-format
 690         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 691                 return undef;
 692         }
 693         return $input;
 694 }
 695
 696 # decode sequences of octets in utf8 into Perl's internal form,
 697 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 698 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 699 sub to_utf8 {
 700         my $str = shift;
 701         if (utf8::valid($str)) {
 702                 utf8::decode($str);
 703                 return $str;
 704         } else {
 705                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 706         }
 707 }
 708
 709 # quote unsafe chars, but keep the slash, even when it's not
 710 # correct, but quoted slashes look too horrible in bookmarks
 711 sub esc_param {
 712         my $str = shift;
 713         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 714         $str =~ s/\+/%2B/g;
 715         $str =~ s/ /\+/g;
 716         return $str;
 717 }
 718
 719 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 720 sub esc_url {
 721         my $str = shift;
 722         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 723         $str =~ s/\+/%2B/g;
 724         $str =~ s/ /\+/g;
 725         return $str;
 726 }
 727
 728 # replace invalid utf8 character with SUBSTITUTION sequence
 729 sub esc_html ($;%) {
 730         my $str = shift;
 731         my %opts = @_;
 732
 733         $str = to_utf8($str);
 734         $str = $cgi->escapeHTML($str);
 735         if ($opts{'-nbsp'}) {
 736                 $str =~ s/ /&nbsp;/g;
 737         }
 738         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 739         return $str;
 740 }
 741
 742 # quote control characters and escape filename to HTML
 743 sub esc_path {
 744         my $str = shift;
 745         my %opts = @_;
 746
 747         $str = to_utf8($str);
 748         $str = $cgi->escapeHTML($str);
 749         if ($opts{'-nbsp'}) {
 750                 $str =~ s/ /&nbsp;/g;
 751         }
 752         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 753         return $str;
 754 }
 755
 756 # Make control characters "printable", using character escape codes (CEC)
 757 sub quot_cec {
 758         my $cntrl = shift;
 759         my %opts = @_;
 760         my %es = ( # character escape codes, aka escape sequences
 761                 "\t" => '\t',   # tab            (HT)
 762                 "\n" => '\n',   # line feed      (LF)
 763                 "\r" => '\r',   # carrige return (CR)
 764                 "\f" => '\f',   # form feed      (FF)
 765                 "\b" => '\b',   # backspace      (BS)
 766                 "\a" => '\a',   # alarm (bell)   (BEL)
 767                 "\e" => '\e',   # escape         (ESC)
 768                 "\013" => '\v', # vertical tab   (VT)
 769                 "\000" => '\0', # nul character  (NUL)
 770         );
 771         my $chr = ( (exists $es{$cntrl})
 772                     ? $es{$cntrl}
 773                     : sprintf('\%03o', ord($cntrl)) );
 774         if ($opts{-nohtml}) {
 775                 return $chr;
 776         } else {
 777                 return "<span class=\"cntrl\">$chr</span>";
 778         }
 779 }
 780
 781 # Alternatively use unicode control pictures codepoints,
 782 # Unicode "printable representation" (PR)
 783 sub quot_upr {
 784         my $cntrl = shift;
 785         my %opts = @_;
 786
 787         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 788         if ($opts{-nohtml}) {
 789                 return $chr;
 790         } else {
 791                 return "<span class=\"cntrl\">$chr</span>";
 792         }
 793 }
 794
 795 # git may return quoted and escaped filenames
 796 sub unquote {
 797         my $str = shift;
 798
 799         sub unq {
 800                 my $seq = shift;
 801                 my %es = ( # character escape codes, aka escape sequences
 802                         't' => "\t",   # tab            (HT, TAB)
 803                         'n' => "\n",   # newline        (NL)
 804                         'r' => "\r",   # return         (CR)
 805                         'f' => "\f",   # form feed      (FF)
 806                         'b' => "\b",   # backspace      (BS)
 807                         'a' => "\a",   # alarm (bell)   (BEL)
 808                         'e' => "\e",   # escape         (ESC)
 809                         'v' => "\013", # vertical tab   (VT)
 810                 );
 811
 812                 if ($seq =~ m/^[0-7]{1,3}$/) {
 813                         # octal char sequence
 814                         return chr(oct($seq));
 815                 } elsif (exists $es{$seq}) {
 816                         # C escape sequence, aka character escape code
 817                         return $es{$seq};
 818                 }
 819                 # quoted ordinary character
 820                 return $seq;
 821         }
 822
 823         if ($str =~ m/^"(.*)"$/) {
 824                 # needs unquoting
 825                 $str = $1;
 826                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 827         }
 828         return $str;
 829 }
 830
 831 # escape tabs (convert tabs to spaces)
 832 sub untabify {
 833         my $line = shift;
 834
 835         while ((my $pos = index($line, "\t")) != -1) {
 836                 if (my $count = (8 - ($pos % 8))) {
 837                         my $spaces = ' ' x $count;
 838                         $line =~ s/\t/$spaces/;
 839                 }
 840         }
 841
 842         return $line;
 843 }
 844
 845 sub project_in_list {
 846         my $project = shift;
 847         my @list = git_get_projects_list();
 848         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 849 }
 850
 851 ## ----------------------------------------------------------------------
 852 ## HTML aware string manipulation
 853
 854 # Try to chop given string on a word boundary between position
 855 # $len and $len+$add_len. If there is no word boundary there,
 856 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 857 # (marking chopped part) would be longer than given string.
 858 sub chop_str {
 859         my $str = shift;
 860         my $len = shift;
 861         my $add_len = shift || 10;
 862         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 863
 864         # allow only $len chars, but don't cut a word if it would fit in $add_len
 865         # if it doesn't fit, cut it if it's still longer than the dots we would add
 866         # remove chopped character entities entirely
 867
 868         # when chopping in the middle, distribute $len into left and right part
 869         # return early if chopping wouldn't make string shorter
 870         if ($where eq 'center') {
 871                 return $str if ($len + 5 >= length($str)); # filler is length 5
 872                 $len = int($len/2);
 873         } else {
 874                 return $str if ($len + 4 >= length($str)); # filler is length 4
 875         }
 876
 877         # regexps: ending and beginning with word part up to $add_len
 878         my $endre = qr/.{$len}\w{0,$add_len}/;
 879         my $begre = qr/\w{0,$add_len}.{$len}/;
 880
 881         if ($where eq 'left') {
 882                 $str =~ m/^(.*?)($begre)$/;
 883                 my ($lead, $body) = ($1, $2);
 884                 if (length($lead) > 4) {
 885                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 886                         $lead = " ...";
 887                 }
 888                 return "$lead$body";
 889
 890         } elsif ($where eq 'center') {
 891                 $str =~ m/^($endre)(.*)$/;
 892                 my ($left, $str)  = ($1, $2);
 893                 $str =~ m/^(.*?)($begre)$/;
 894                 my ($mid, $right) = ($1, $2);
 895                 if (length($mid) > 5) {
 896                         $left  =~ s/&[^;]*$//;
 897                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 898                         $mid = " ... ";
 899                 }
 900                 return "$left$mid$right";
 901
 902         } else {
 903                 $str =~ m/^($endre)(.*)$/;
 904                 my $body = $1;
 905                 my $tail = $2;
 906                 if (length($tail) > 4) {
 907                         $body =~ s/&[^;]*$//;
 908                         $tail = "... ";
 909                 }
 910                 return "$body$tail";
 911         }
 912 }
 913
 914 # takes the same arguments as chop_str, but also wraps a <span> around the
 915 # result with a title attribute if it does get chopped. Additionally, the
 916 # string is HTML-escaped.
 917 sub chop_and_escape_str {
 918         my ($str) = @_;
 919
 920         my $chopped = chop_str(@_);
 921         if ($chopped eq $str) {
 922                 return esc_html($chopped);
 923         } else {
 924                 $str =~ s/([[:cntrl:]])/?/g;
 925                 return $cgi->span({-title=>$str}, esc_html($chopped));
 926         }
 927 }
 928
 929 ## ----------------------------------------------------------------------
 930 ## functions returning short strings
 931
 932 # CSS class for given age value (in seconds)
 933 sub age_class {
 934         my $age = shift;
 935
 936         if (!defined $age) {
 937                 return "noage";
 938         } elsif ($age < 60*60*2) {
 939                 return "age0";
 940         } elsif ($age < 60*60*24*2) {
 941                 return "age1";
 942         } else {
 943                 return "age2";
 944         }
 945 }
 946
 947 # convert age in seconds to "nn units ago" string
 948 sub age_string {
 949         my $age = shift;
 950         my $age_str;
 951
 952         if ($age > 60*60*24*365*2) {
 953                 $age_str = (int $age/60/60/24/365);
 954                 $age_str .= " years ago";
 955         } elsif ($age > 60*60*24*(365/12)*2) {
 956                 $age_str = int $age/60/60/24/(365/12);
 957                 $age_str .= " months ago";
 958         } elsif ($age > 60*60*24*7*2) {
 959                 $age_str = int $age/60/60/24/7;
 960                 $age_str .= " weeks ago";
 961         } elsif ($age > 60*60*24*2) {
 962                 $age_str = int $age/60/60/24;
 963                 $age_str .= " days ago";
 964         } elsif ($age > 60*60*2) {
 965                 $age_str = int $age/60/60;
 966                 $age_str .= " hours ago";
 967         } elsif ($age > 60*2) {
 968                 $age_str = int $age/60;
 969                 $age_str .= " min ago";
 970         } elsif ($age > 2) {
 971                 $age_str = int $age;
 972                 $age_str .= " sec ago";
 973         } else {
 974                 $age_str .= " right now";
 975         }
 976         return $age_str;
 977 }
 978
 979 use constant {
 980         S_IFINVALID => 0030000,
 981         S_IFGITLINK => 0160000,
 982 };
 983
 984 # submodule/subproject, a commit object reference
 985 sub S_ISGITLINK($) {
 986         my $mode = shift;
 987
 988         return (($mode & S_IFMT) == S_IFGITLINK)
 989 }
 990
 991 # convert file mode in octal to symbolic file mode string
 992 sub mode_str {
 993         my $mode = oct shift;
 994
 995         if (S_ISGITLINK($mode)) {
 996                 return 'm---------';
 997         } elsif (S_ISDIR($mode & S_IFMT)) {
 998                 return 'drwxr-xr-x';
 999         } elsif (S_ISLNK($mode)) {
1000                 return 'lrwxrwxrwx';
1001         } elsif (S_ISREG($mode)) {
1002                 # git cares only about the executable bit
1003                 if ($mode & S_IXUSR) {
1004                         return '-rwxr-xr-x';
1005                 } else {
1006                         return '-rw-r--r--';
1007                 };
1008         } else {
1009                 return '----------';
1010         }
1011 }
1012
1013 # convert file mode in octal to file type string
1014 sub file_type {
1015         my $mode = shift;
1016
1017         if ($mode !~ m/^[0-7]+$/) {
1018                 return $mode;
1019         } else {
1020                 $mode = oct $mode;
1021         }
1022
1023         if (S_ISGITLINK($mode)) {
1024                 return "submodule";
1025         } elsif (S_ISDIR($mode & S_IFMT)) {
1026                 return "directory";
1027         } elsif (S_ISLNK($mode)) {
1028                 return "symlink";
1029         } elsif (S_ISREG($mode)) {
1030                 return "file";
1031         } else {
1032                 return "unknown";
1033         }
1034 }
1035
1036 # convert file mode in octal to file type description string
1037 sub file_type_long {
1038         my $mode = shift;
1039
1040         if ($mode !~ m/^[0-7]+$/) {
1041                 return $mode;
1042         } else {
1043                 $mode = oct $mode;
1044         }
1045
1046         if (S_ISGITLINK($mode)) {
1047                 return "submodule";
1048         } elsif (S_ISDIR($mode & S_IFMT)) {
1049                 return "directory";
1050         } elsif (S_ISLNK($mode)) {
1051                 return "symlink";
1052         } elsif (S_ISREG($mode)) {
1053                 if ($mode & S_IXUSR) {
1054                         return "executable";
1055                 } else {
1056                         return "file";
1057                 };
1058         } else {
1059                 return "unknown";
1060         }
1061 }
1062
1063
1064 ## ----------------------------------------------------------------------
1065 ## functions returning short HTML fragments, or transforming HTML fragments
1066 ## which don't belong to other sections
1067
1068 # format line of commit message.
1069 sub format_log_line_html {
1070         my $line = shift;
1071
1072         $line = esc_html($line, -nbsp=>1);
1073         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1074                 my $hash_text = $1;
1075                 my $link =
1076                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1077                                 -class => "text"}, $hash_text);
1078                 $line =~ s/$hash_text/$link/;
1079         }
1080         return $line;
1081 }
1082
1083 # format marker of refs pointing to given object
1084 sub format_ref_marker {
1085         my ($refs, $id) = @_;
1086         my $markers = '';
1087
1088         if (defined $refs->{$id}) {
1089                 foreach my $ref (@{$refs->{$id}}) {
1090                         my ($type, $name) = qw();
1091                         # e.g. tags/v2.6.11 or heads/next
1092                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1093                                 $type = $1;
1094                                 $name = $2;
1095                         } else {
1096                                 $type = "ref";
1097                                 $name = $ref;
1098                         }
1099
1100                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1101                                     esc_html($name) . "</span>";
1102                 }
1103         }
1104
1105         if ($markers) {
1106                 return ' <span class="refs">'. $markers . '</span>';
1107         } else {
1108                 return "";
1109         }
1110 }
1111
1112 # format, perhaps shortened and with markers, title line
1113 sub format_subject_html {
1114         my ($long, $short, $href, $extra) = @_;
1115         $extra = '' unless defined($extra);
1116
1117         if (length($short) < length($long)) {
1118                 return $cgi->a({-href => $href, -class => "list subject",
1119                                 -title => to_utf8($long)},
1120                        esc_html($short) . $extra);
1121         } else {
1122                 return $cgi->a({-href => $href, -class => "list subject"},
1123                        esc_html($long)  . $extra);
1124         }
1125 }
1126
1127 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1128 sub format_git_diff_header_line {
1129         my $line = shift;
1130         my $diffinfo = shift;
1131         my ($from, $to) = @_;
1132
1133         if ($diffinfo->{'nparents'}) {
1134                 # combined diff
1135                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1136                 if ($to->{'href'}) {
1137                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1138                                          esc_path($to->{'file'}));
1139                 } else { # file was deleted (no href)
1140                         $line .= esc_path($to->{'file'});
1141                 }
1142         } else {
1143                 # "ordinary" diff
1144                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1145                 if ($from->{'href'}) {
1146                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1147                                          'a/' . esc_path($from->{'file'}));
1148                 } else { # file was added (no href)
1149                         $line .= 'a/' . esc_path($from->{'file'});
1150                 }
1151                 $line .= ' ';
1152                 if ($to->{'href'}) {
1153                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1154                                          'b/' . esc_path($to->{'file'}));
1155                 } else { # file was deleted
1156                         $line .= 'b/' . esc_path($to->{'file'});
1157                 }
1158         }
1159
1160         return "<div class=\"diff header\">$line</div>\n";
1161 }
1162
1163 # format extended diff header line, before patch itself
1164 sub format_extended_diff_header_line {
1165         my $line = shift;
1166         my $diffinfo = shift;
1167         my ($from, $to) = @_;
1168
1169         # match <path>
1170         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1171                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1172                                        esc_path($from->{'file'}));
1173         }
1174         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1175                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1176                                  esc_path($to->{'file'}));
1177         }
1178         # match single <mode>
1179         if ($line =~ m/\s(\d{6})$/) {
1180                 $line .= '<span class="info"> (' .
1181                          file_type_long($1) .
1182                          ')</span>';
1183         }
1184         # match <hash>
1185         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1186                 # can match only for combined diff
1187                 $line = 'index ';
1188                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1189                         if ($from->{'href'}[$i]) {
1190                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1191                                                   -class=>"hash"},
1192                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1193                         } else {
1194                                 $line .= '0' x 7;
1195                         }
1196                         # separator
1197                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1198                 }
1199                 $line .= '..';
1200                 if ($to->{'href'}) {
1201                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1202                                          substr($diffinfo->{'to_id'},0,7));
1203                 } else {
1204                         $line .= '0' x 7;
1205                 }
1206
1207         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1208                 # can match only for ordinary diff
1209                 my ($from_link, $to_link);
1210                 if ($from->{'href'}) {
1211                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1212                                              substr($diffinfo->{'from_id'},0,7));
1213                 } else {
1214                         $from_link = '0' x 7;
1215                 }
1216                 if ($to->{'href'}) {
1217                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1218                                            substr($diffinfo->{'to_id'},0,7));
1219                 } else {
1220                         $to_link = '0' x 7;
1221                 }
1222                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1223                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1224         }
1225
1226         return $line . "<br/>\n";
1227 }
1228
1229 # format from-file/to-file diff header
1230 sub format_diff_from_to_header {
1231         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1232         my $line;
1233         my $result = '';
1234
1235         $line = $from_line;
1236         #assert($line =~ m/^---/) if DEBUG;
1237         # no extra formatting for "^--- /dev/null"
1238         if (! $diffinfo->{'nparents'}) {
1239                 # ordinary (single parent) diff
1240                 if ($line =~ m!^--- "?a/!) {
1241                         if ($from->{'href'}) {
1242                                 $line = '--- a/' .
1243                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1244                                                 esc_path($from->{'file'}));
1245                         } else {
1246                                 $line = '--- a/' .
1247                                         esc_path($from->{'file'});
1248                         }
1249                 }
1250                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1251
1252         } else {
1253                 # combined diff (merge commit)
1254                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1255                         if ($from->{'href'}[$i]) {
1256                                 $line = '--- ' .
1257                                         $cgi->a({-href=>href(action=>"blobdiff",
1258                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1259                                                              hash_parent_base=>$parents[$i],
1260                                                              file_parent=>$from->{'file'}[$i],
1261                                                              hash=>$diffinfo->{'to_id'},
1262                                                              hash_base=>$hash,
1263                                                              file_name=>$to->{'file'}),
1264                                                  -class=>"path",
1265                                                  -title=>"diff" . ($i+1)},
1266                                                 $i+1) .
1267                                         '/' .
1268                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1269                                                 esc_path($from->{'file'}[$i]));
1270                         } else {
1271                                 $line = '--- /dev/null';
1272                         }
1273                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1274                 }
1275         }
1276
1277         $line = $to_line;
1278         #assert($line =~ m/^\+\+\+/) if DEBUG;
1279         # no extra formatting for "^+++ /dev/null"
1280         if ($line =~ m!^\+\+\+ "?b/!) {
1281                 if ($to->{'href'}) {
1282                         $line = '+++ b/' .
1283                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1284                                         esc_path($to->{'file'}));
1285                 } else {
1286                         $line = '+++ b/' .
1287                                 esc_path($to->{'file'});
1288                 }
1289         }
1290         $result .= qq!<div class="diff to_file">$line</div>\n!;
1291
1292         return $result;
1293 }
1294
1295 # create note for patch simplified by combined diff
1296 sub format_diff_cc_simplified {
1297         my ($diffinfo, @parents) = @_;
1298         my $result = '';
1299
1300         $result .= "<div class=\"diff header\">" .
1301                    "diff --cc ";
1302         if (!is_deleted($diffinfo)) {
1303                 $result .= $cgi->a({-href => href(action=>"blob",
1304                                                   hash_base=>$hash,
1305                                                   hash=>$diffinfo->{'to_id'},
1306                                                   file_name=>$diffinfo->{'to_file'}),
1307                                     -class => "path"},
1308                                    esc_path($diffinfo->{'to_file'}));
1309         } else {
1310                 $result .= esc_path($diffinfo->{'to_file'});
1311         }
1312         $result .= "</div>\n" . # class="diff header"
1313                    "<div class=\"diff nodifferences\">" .
1314                    "Simple merge" .
1315                    "</div>\n"; # class="diff nodifferences"
1316
1317         return $result;
1318 }
1319
1320 # format patch (diff) line (not to be used for diff headers)
1321 sub format_diff_line {
1322         my $line = shift;
1323         my ($from, $to) = @_;
1324         my $diff_class = "";
1325
1326         chomp $line;
1327
1328         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1329                 # combined diff
1330                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1331                 if ($line =~ m/^\@{3}/) {
1332                         $diff_class = " chunk_header";
1333                 } elsif ($line =~ m/^\\/) {
1334                         $diff_class = " incomplete";
1335                 } elsif ($prefix =~ tr/+/+/) {
1336                         $diff_class = " add";
1337                 } elsif ($prefix =~ tr/-/-/) {
1338                         $diff_class = " rem";
1339                 }
1340         } else {
1341                 # assume ordinary diff
1342                 my $char = substr($line, 0, 1);
1343                 if ($char eq '+') {
1344                         $diff_class = " add";
1345                 } elsif ($char eq '-') {
1346                         $diff_class = " rem";
1347                 } elsif ($char eq '@') {
1348                         $diff_class = " chunk_header";
1349                 } elsif ($char eq "\\") {
1350                         $diff_class = " incomplete";
1351                 }
1352         }
1353         $line = untabify($line);
1354         if ($from && $to && $line =~ m/^\@{2} /) {
1355                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1356                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1357
1358                 $from_lines = 0 unless defined $from_lines;
1359                 $to_lines   = 0 unless defined $to_lines;
1360
1361                 if ($from->{'href'}) {
1362                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1363                                              -class=>"list"}, $from_text);
1364                 }
1365                 if ($to->{'href'}) {
1366                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1367                                              -class=>"list"}, $to_text);
1368                 }
1369                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1370                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1371                 return "<div class=\"diff$diff_class\">$line</div>\n";
1372         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1373                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1374                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1375
1376                 @from_text = split(' ', $ranges);
1377                 for (my $i = 0; $i < @from_text; ++$i) {
1378                         ($from_start[$i], $from_nlines[$i]) =
1379                                 (split(',', substr($from_text[$i], 1)), 0);
1380                 }
1381
1382                 $to_text   = pop @from_text;
1383                 $to_start  = pop @from_start;
1384                 $to_nlines = pop @from_nlines;
1385
1386                 $line = "<span class=\"chunk_info\">$prefix ";
1387                 for (my $i = 0; $i < @from_text; ++$i) {
1388                         if ($from->{'href'}[$i]) {
1389                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1390                                                   -class=>"list"}, $from_text[$i]);
1391                         } else {
1392                                 $line .= $from_text[$i];
1393                         }
1394                         $line .= " ";
1395                 }
1396                 if ($to->{'href'}) {
1397                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1398                                           -class=>"list"}, $to_text);
1399                 } else {
1400                         $line .= $to_text;
1401                 }
1402                 $line .= " $prefix</span>" .
1403                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1404                 return "<div class=\"diff$diff_class\">$line</div>\n";
1405         }
1406         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1407 }
1408
1409 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1410 # linked.  Pass the hash of the tree/commit to snapshot.
1411 sub format_snapshot_links {
1412         my ($hash) = @_;
1413         my @snapshot_fmts = gitweb_check_feature('snapshot');
1414         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1415         my $num_fmts = @snapshot_fmts;
1416         if ($num_fmts > 1) {
1417                 # A parenthesized list of links bearing format names.
1418                 # e.g. "snapshot (_tar.gz_ _zip_)"
1419                 return "snapshot (" . join(' ', map
1420                         $cgi->a({
1421                                 -href => href(
1422                                         action=>"snapshot",
1423                                         hash=>$hash,
1424                                         snapshot_format=>$_
1425                                 )
1426                         }, $known_snapshot_formats{$_}{'display'})
1427                 , @snapshot_fmts) . ")";
1428         } elsif ($num_fmts == 1) {
1429                 # A single "snapshot" link whose tooltip bears the format name.
1430                 # i.e. "_snapshot_"
1431                 my ($fmt) = @snapshot_fmts;
1432                 return
1433                         $cgi->a({
1434                                 -href => href(
1435                                         action=>"snapshot",
1436                                         hash=>$hash,
1437                                         snapshot_format=>$fmt
1438                                 ),
1439                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1440                         }, "snapshot");
1441         } else { # $num_fmts == 0
1442                 return undef;
1443         }
1444 }
1445
1446 ## ----------------------------------------------------------------------
1447 ## git utility subroutines, invoking git commands
1448
1449 # returns path to the core git executable and the --git-dir parameter as list
1450 sub git_cmd {
1451         return $GIT, '--git-dir='.$git_dir;
1452 }
1453
1454 # returns path to the core git executable and the --git-dir parameter as string
1455 sub git_cmd_str {
1456         return join(' ', git_cmd());
1457 }
1458
1459 # get HEAD ref of given project as hash
1460 sub git_get_head_hash {
1461         my $project = shift;
1462         my $o_git_dir = $git_dir;
1463         my $retval = undef;
1464         $git_dir = "$projectroot/$project";
1465         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1466                 my $head = <$fd>;
1467                 close $fd;
1468                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1469                         $retval = $1;
1470                 }
1471         }
1472         if (defined $o_git_dir) {
1473                 $git_dir = $o_git_dir;
1474         }
1475         return $retval;
1476 }
1477
1478 # get type of given object
1479 sub git_get_type {
1480         my $hash = shift;
1481
1482         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1483         my $type = <$fd>;
1484         close $fd or return;
1485         chomp $type;
1486         return $type;
1487 }
1488
1489 # repository configuration
1490 our $config_file = '';
1491 our %config;
1492
1493 # store multiple values for single key as anonymous array reference
1494 # single values stored directly in the hash, not as [ <value> ]
1495 sub hash_set_multi {
1496         my ($hash, $key, $value) = @_;
1497
1498         if (!exists $hash->{$key}) {
1499                 $hash->{$key} = $value;
1500         } elsif (!ref $hash->{$key}) {
1501                 $hash->{$key} = [ $hash->{$key}, $value ];
1502         } else {
1503                 push @{$hash->{$key}}, $value;
1504         }
1505 }
1506
1507 # return hash of git project configuration
1508 # optionally limited to some section, e.g. 'gitweb'
1509 sub git_parse_project_config {
1510         my $section_regexp = shift;
1511         my %config;
1512
1513         local $/ = "\0";
1514
1515         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1516                 or return;
1517
1518         while (my $keyval = <$fh>) {
1519                 chomp $keyval;
1520                 my ($key, $value) = split(/\n/, $keyval, 2);
1521
1522                 hash_set_multi(\%config, $key, $value)
1523                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1524         }
1525         close $fh;
1526
1527         return %config;
1528 }
1529
1530 # convert config value to boolean, 'true' or 'false'
1531 # no value, number > 0, 'true' and 'yes' values are true
1532 # rest of values are treated as false (never as error)
1533 sub config_to_bool {
1534         my $val = shift;
1535
1536         # strip leading and trailing whitespace
1537         $val =~ s/^\s+//;
1538         $val =~ s/\s+$//;
1539
1540         return (!defined $val ||               # section.key
1541                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1542                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1543 }
1544
1545 # convert config value to simple decimal number
1546 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1547 # to be multiplied by 1024, 1048576, or 1073741824
1548 sub config_to_int {
1549         my $val = shift;
1550
1551         # strip leading and trailing whitespace
1552         $val =~ s/^\s+//;
1553         $val =~ s/\s+$//;
1554
1555         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1556                 $unit = lc($unit);
1557                 # unknown unit is treated as 1
1558                 return $num * ($unit eq 'g' ? 1073741824 :
1559                                $unit eq 'm' ?    1048576 :
1560                                $unit eq 'k' ?       1024 : 1);
1561         }
1562         return $val;
1563 }
1564
1565 # convert config value to array reference, if needed
1566 sub config_to_multi {
1567         my $val = shift;
1568
1569         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1570 }
1571
1572 sub git_get_project_config {
1573         my ($key, $type) = @_;
1574
1575         # key sanity check
1576         return unless ($key);
1577         $key =~ s/^gitweb\.//;
1578         return if ($key =~ m/\W/);
1579
1580         # type sanity check
1581         if (defined $type) {
1582                 $type =~ s/^--//;
1583                 $type = undef
1584                         unless ($type eq 'bool' || $type eq 'int');
1585         }
1586
1587         # get config
1588         if (!defined $config_file ||
1589             $config_file ne "$git_dir/config") {
1590                 %config = git_parse_project_config('gitweb');
1591                 $config_file = "$git_dir/config";
1592         }
1593
1594         # ensure given type
1595         if (!defined $type) {
1596                 return $config{"gitweb.$key"};
1597         } elsif ($type eq 'bool') {
1598                 # backward compatibility: 'git config --bool' returns true/false
1599                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1600         } elsif ($type eq 'int') {
1601                 return config_to_int($config{"gitweb.$key"});
1602         }
1603         return $config{"gitweb.$key"};
1604 }
1605
1606 # get hash of given path at given ref
1607 sub git_get_hash_by_path {
1608         my $base = shift;
1609         my $path = shift || return undef;
1610         my $type = shift;
1611
1612         $path =~ s,/+$,,;
1613
1614         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1615                 or die_error(undef, "Open git-ls-tree failed");
1616         my $line = <$fd>;
1617         close $fd or return undef;
1618
1619         if (!defined $line) {
1620                 # there is no tree or hash given by $path at $base
1621                 return undef;
1622         }
1623
1624         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1625         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1626         if (defined $type && $type ne $2) {
1627                 # type doesn't match
1628                 return undef;
1629         }
1630         return $3;
1631 }
1632
1633 # get path of entry with given hash at given tree-ish (ref)
1634 # used to get 'from' filename for combined diff (merge commit) for renames
1635 sub git_get_path_by_hash {
1636         my $base = shift || return;
1637         my $hash = shift || return;
1638
1639         local $/ = "\0";
1640
1641         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1642                 or return undef;
1643         while (my $line = <$fd>) {
1644                 chomp $line;
1645
1646                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1647                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1648                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1649                         close $fd;
1650                         return $1;
1651                 }
1652         }
1653         close $fd;
1654         return undef;
1655 }
1656
1657 ## ......................................................................
1658 ## git utility functions, directly accessing git repository
1659
1660 sub git_get_project_description {
1661         my $path = shift;
1662
1663         $git_dir = "$projectroot/$path";
1664         open my $fd, "$git_dir/description"
1665                 or return git_get_project_config('description');
1666         my $descr = <$fd>;
1667         close $fd;
1668         if (defined $descr) {
1669                 chomp $descr;
1670         }
1671         return $descr;
1672 }
1673
1674 sub git_get_project_url_list {
1675         my $path = shift;
1676
1677         $git_dir = "$projectroot/$path";
1678         open my $fd, "$git_dir/cloneurl"
1679                 or return wantarray ?
1680                 @{ config_to_multi(git_get_project_config('url')) } :
1681                    config_to_multi(git_get_project_config('url'));
1682         my @git_project_url_list = map { chomp; $_ } <$fd>;
1683         close $fd;
1684
1685         return wantarray ? @git_project_url_list : \@git_project_url_list;
1686 }
1687
1688 sub git_get_projects_list {
1689         my ($filter) = @_;
1690         my @list;
1691
1692         $filter ||= '';
1693         $filter =~ s/\.git$//;
1694
1695         my ($check_forks) = gitweb_check_feature('forks');
1696
1697         if (-d $projects_list) {
1698                 # search in directory
1699                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1700                 # remove the trailing "/"
1701                 $dir =~ s!/+$!!;
1702                 my $pfxlen = length("$dir");
1703                 my $pfxdepth = ($dir =~ tr!/!!);
1704
1705                 File::Find::find({
1706                         follow_fast => 1, # follow symbolic links
1707                         follow_skip => 2, # ignore duplicates
1708                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1709                         wanted => sub {
1710                                 # skip project-list toplevel, if we get it.
1711                                 return if (m!^[/.]$!);
1712                                 # only directories can be git repositories
1713                                 return unless (-d $_);
1714                                 # don't traverse too deep (Find is super slow on os x)
1715                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1716                                         $File::Find::prune = 1;
1717                                         return;
1718                                 }
1719
1720                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1721                                 # we check related file in $projectroot
1722                                 if ($check_forks and $subdir =~ m#/.#) {
1723                                         $File::Find::prune = 1;
1724                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1725                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1726                                         $File::Find::prune = 1;
1727                                 }
1728                         },
1729                 }, "$dir");
1730
1731         } elsif (-f $projects_list) {
1732                 # read from file(url-encoded):
1733                 # 'git%2Fgit.git Linus+Torvalds'
1734                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1735                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1736                 my %paths;
1737                 open my ($fd), $projects_list or return;
1738         PROJECT:
1739                 while (my $line = <$fd>) {
1740                         chomp $line;
1741                         my ($path, $owner) = split ' ', $line;
1742                         $path = unescape($path);
1743                         $owner = unescape($owner);
1744                         if (!defined $path) {
1745                                 next;
1746                         }
1747                         if ($filter ne '') {
1748                                 # looking for forks;
1749                                 my $pfx = substr($path, 0, length($filter));
1750                                 if ($pfx ne $filter) {
1751                                         next PROJECT;
1752                                 }
1753                                 my $sfx = substr($path, length($filter));
1754                                 if ($sfx !~ /^\/.*\.git$/) {
1755                                         next PROJECT;
1756                                 }
1757                         } elsif ($check_forks) {
1758                         PATH:
1759                                 foreach my $filter (keys %paths) {
1760                                         # looking for forks;
1761                                         my $pfx = substr($path, 0, length($filter));
1762                                         if ($pfx ne $filter) {
1763                                                 next PATH;
1764                                         }
1765                                         my $sfx = substr($path, length($filter));
1766                                         if ($sfx !~ /^\/.*\.git$/) {
1767                                                 next PATH;
1768                                         }
1769                                         # is a fork, don't include it in
1770                                         # the list
1771                                         next PROJECT;
1772                                 }
1773                         }
1774                         if (check_export_ok("$projectroot/$path")) {
1775                                 my $pr = {
1776                                         path => $path,
1777                                         owner => to_utf8($owner),
1778                                 };
1779                                 push @list, $pr;
1780                                 (my $forks_path = $path) =~ s/\.git$//;
1781                                 $paths{$forks_path}++;
1782                         }
1783                 }
1784                 close $fd;
1785         }
1786         return @list;
1787 }
1788
1789 our $gitweb_project_owner = undef;
1790 sub git_get_project_list_from_file {
1791
1792         return if (defined $gitweb_project_owner);
1793
1794         $gitweb_project_owner = {};
1795         # read from file (url-encoded):
1796         # 'git%2Fgit.git Linus+Torvalds'
1797         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1798         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1799         if (-f $projects_list) {
1800                 open (my $fd , $projects_list);
1801                 while (my $line = <$fd>) {
1802                         chomp $line;
1803                         my ($pr, $ow) = split ' ', $line;
1804                         $pr = unescape($pr);
1805                         $ow = unescape($ow);
1806                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1807                 }
1808                 close $fd;
1809         }
1810 }
1811
1812 sub git_get_project_owner {
1813         my $project = shift;
1814         my $owner;
1815
1816         return undef unless $project;
1817         $git_dir = "$projectroot/$project";
1818
1819         if (!defined $gitweb_project_owner) {
1820                 git_get_project_list_from_file();
1821         }
1822
1823         if (exists $gitweb_project_owner->{$project}) {
1824                 $owner = $gitweb_project_owner->{$project};
1825         }
1826         if (!defined $owner){
1827                 $owner = git_get_project_config('owner');
1828         }
1829         if (!defined $owner) {
1830                 $owner = get_file_owner("$git_dir");
1831         }
1832
1833         return $owner;
1834 }
1835
1836 sub git_get_last_activity {
1837         my ($path) = @_;
1838         my $fd;
1839
1840         $git_dir = "$projectroot/$path";
1841         open($fd, "-|", git_cmd(), 'for-each-ref',
1842              '--format=%(committer)',
1843              '--sort=-committerdate',
1844              '--count=1',
1845              'refs/heads') or return;
1846         my $most_recent = <$fd>;
1847         close $fd or return;
1848         if (defined $most_recent &&
1849             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1850                 my $timestamp = $1;
1851                 my $age = time - $timestamp;
1852                 return ($age, age_string($age));
1853         }
1854         return (undef, undef);
1855 }
1856
1857 sub git_get_references {
1858         my $type = shift || "";
1859         my %refs;
1860         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1861         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1862         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1863                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1864                 or return;
1865
1866         while (my $line = <$fd>) {
1867                 chomp $line;
1868                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1869                         if (defined $refs{$1}) {
1870                                 push @{$refs{$1}}, $2;
1871                         } else {
1872                                 $refs{$1} = [ $2 ];
1873                         }
1874                 }
1875         }
1876         close $fd or return;
1877         return \%refs;
1878 }
1879
1880 sub git_get_rev_name_tags {
1881         my $hash = shift || return undef;
1882
1883         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1884                 or return;
1885         my $name_rev = <$fd>;
1886         close $fd;
1887
1888         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1889                 return $1;
1890         } else {
1891                 # catches also '$hash undefined' output
1892                 return undef;
1893         }
1894 }
1895
1896 ## ----------------------------------------------------------------------
1897 ## parse to hash functions
1898
1899 sub parse_date {
1900         my $epoch = shift;
1901         my $tz = shift || "-0000";
1902
1903         my %date;
1904         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1905         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1906         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1907         $date{'hour'} = $hour;
1908         $date{'minute'} = $min;
1909         $date{'mday'} = $mday;
1910         $date{'day'} = $days[$wday];
1911         $date{'month'} = $months[$mon];
1912         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1913                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1914         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1915                              $mday, $months[$mon], $hour ,$min;
1916         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1917                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1918
1919         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1920         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1921         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1922         $date{'hour_local'} = $hour;
1923         $date{'minute_local'} = $min;
1924         $date{'tz_local'} = $tz;
1925         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1926                                   1900+$year, $mon+1, $mday,
1927                                   $hour, $min, $sec, $tz);
1928         return %date;
1929 }
1930
1931 sub parse_tag {
1932         my $tag_id = shift;
1933         my %tag;
1934         my @comment;
1935
1936         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1937         $tag{'id'} = $tag_id;
1938         while (my $line = <$fd>) {
1939                 chomp $line;
1940                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1941                         $tag{'object'} = $1;
1942                 } elsif ($line =~ m/^type (.+)$/) {
1943                         $tag{'type'} = $1;
1944                 } elsif ($line =~ m/^tag (.+)$/) {
1945                         $tag{'name'} = $1;
1946                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1947                         $tag{'author'} = $1;
1948                         $tag{'epoch'} = $2;
1949                         $tag{'tz'} = $3;
1950                 } elsif ($line =~ m/--BEGIN/) {
1951                         push @comment, $line;
1952                         last;
1953                 } elsif ($line eq "") {
1954                         last;
1955                 }
1956         }
1957         push @comment, <$fd>;
1958         $tag{'comment'} = \@comment;
1959         close $fd or return;
1960         if (!defined $tag{'name'}) {
1961                 return
1962         };
1963         return %tag
1964 }
1965
1966 sub parse_commit_text {
1967         my ($commit_text, $withparents) = @_;
1968         my @commit_lines = split '\n', $commit_text;
1969         my %co;
1970
1971         pop @commit_lines; # Remove '\0'
1972
1973         if (! @commit_lines) {
1974                 return;
1975         }
1976
1977         my $header = shift @commit_lines;
1978         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1979                 return;
1980         }
1981         ($co{'id'}, my @parents) = split ' ', $header;
1982         while (my $line = shift @commit_lines) {
1983                 last if $line eq "\n";
1984                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1985                         $co{'tree'} = $1;
1986                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1987                         push @parents, $1;
1988                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1989                         $co{'author'} = $1;
1990                         $co{'author_epoch'} = $2;
1991                         $co{'author_tz'} = $3;
1992                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1993                                 $co{'author_name'}  = $1;
1994                                 $co{'author_email'} = $2;
1995                         } else {
1996                                 $co{'author_name'} = $co{'author'};
1997                         }
1998                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1999                         $co{'committer'} = $1;
2000                         $co{'committer_epoch'} = $2;
2001                         $co{'committer_tz'} = $3;
2002                         $co{'committer_name'} = $co{'committer'};
2003                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2004                                 $co{'committer_name'}  = $1;
2005                                 $co{'committer_email'} = $2;
2006                         } else {
2007                                 $co{'committer_name'} = $co{'committer'};
2008                         }
2009                 }
2010         }
2011         if (!defined $co{'tree'}) {
2012                 return;
2013         };
2014         $co{'parents'} = \@parents;
2015         $co{'parent'} = $parents[0];
2016
2017         foreach my $title (@commit_lines) {
2018                 $title =~ s/^    //;
2019                 if ($title ne "") {
2020                         $co{'title'} = chop_str($title, 80, 5);
2021                         # remove leading stuff of merges to make the interesting part visible
2022                         if (length($title) > 50) {
2023                                 $title =~ s/^Automatic //;
2024                                 $title =~ s/^merge (of|with) /Merge ... /i;
2025                                 if (length($title) > 50) {
2026                                         $title =~ s/(http|rsync):\/\///;
2027                                 }
2028                                 if (length($title) > 50) {
2029                                         $title =~ s/(master|www|rsync)\.//;
2030                                 }
2031                                 if (length($title) > 50) {
2032                                         $title =~ s/kernel.org:?//;
2033                                 }
2034                                 if (length($title) > 50) {
2035                                         $title =~ s/\/pub\/scm//;
2036                                 }
2037                         }
2038                         $co{'title_short'} = chop_str($title, 50, 5);
2039                         last;
2040                 }
2041         }
2042         if ($co{'title'} eq "") {
2043                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2044         }
2045         # remove added spaces
2046         foreach my $line (@commit_lines) {
2047                 $line =~ s/^    //;
2048         }
2049         $co{'comment'} = \@commit_lines;
2050
2051         my $age = time - $co{'committer_epoch'};
2052         $co{'age'} = $age;
2053         $co{'age_string'} = age_string($age);
2054         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2055         if ($age > 60*60*24*7*2) {
2056                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2057                 $co{'age_string_age'} = $co{'age_string'};
2058         } else {
2059                 $co{'age_string_date'} = $co{'age_string'};
2060                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2061         }
2062         return %co;
2063 }
2064
2065 sub parse_commit {
2066         my ($commit_id) = @_;
2067         my %co;
2068
2069         local $/ = "\0";
2070
2071         open my $fd, "-|", git_cmd(), "rev-list",
2072                 "--parents",
2073                 "--header",
2074                 "--max-count=1",
2075                 $commit_id,
2076                 "--",
2077                 or die_error(undef, "Open git-rev-list failed");
2078         %co = parse_commit_text(<$fd>, 1);
2079         close $fd;
2080
2081         return %co;
2082 }
2083
2084 sub parse_commits {
2085         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2086         my @cos;
2087
2088         $maxcount ||= 1;
2089         $skip ||= 0;
2090
2091         local $/ = "\0";
2092
2093         open my $fd, "-|", git_cmd(), "rev-list",
2094                 "--header",
2095                 @args,
2096                 ("--max-count=" . $maxcount),
2097                 ("--skip=" . $skip),
2098                 @extra_options,
2099                 $commit_id,
2100                 "--",
2101                 ($filename ? ($filename) : ())
2102                 or die_error(undef, "Open git-rev-list failed");
2103         while (my $line = <$fd>) {
2104                 my %co = parse_commit_text($line);
2105                 push @cos, \%co;
2106         }
2107         close $fd;
2108
2109         return wantarray ? @cos : \@cos;
2110 }
2111
2112 # parse ref from ref_file, given by ref_id, with given type
2113 sub parse_ref {
2114         my $ref_file = shift;
2115         my $ref_id = shift;
2116         my $type = shift || git_get_type($ref_id);
2117         my %ref_item;
2118
2119         $ref_item{'type'} = $type;
2120         $ref_item{'id'} = $ref_id;
2121         $ref_item{'epoch'} = 0;
2122         $ref_item{'age'} = "unknown";
2123         if ($type eq "tag") {
2124                 my %tag = parse_tag($ref_id);
2125                 $ref_item{'comment'} = $tag{'comment'};
2126                 if ($tag{'type'} eq "commit") {
2127                         my %co = parse_commit($tag{'object'});
2128                         $ref_item{'epoch'} = $co{'committer_epoch'};
2129                         $ref_item{'age'} = $co{'age_string'};
2130                 } elsif (defined($tag{'epoch'})) {
2131                         my $age = time - $tag{'epoch'};
2132                         $ref_item{'epoch'} = $tag{'epoch'};
2133                         $ref_item{'age'} = age_string($age);
2134                 }
2135                 $ref_item{'reftype'} = $tag{'type'};
2136                 $ref_item{'name'} = $tag{'name'};
2137                 $ref_item{'refid'} = $tag{'object'};
2138         } elsif ($type eq "commit"){
2139                 my %co = parse_commit($ref_id);
2140                 $ref_item{'reftype'} = "commit";
2141                 $ref_item{'name'} = $ref_file;
2142                 $ref_item{'title'} = $co{'title'};
2143                 $ref_item{'refid'} = $ref_id;
2144                 $ref_item{'epoch'} = $co{'committer_epoch'};
2145                 $ref_item{'age'} = $co{'age_string'};
2146         } else {
2147                 $ref_item{'reftype'} = $type;
2148                 $ref_item{'name'} = $ref_file;
2149                 $ref_item{'refid'} = $ref_id;
2150         }
2151
2152         return %ref_item;
2153 }
2154
2155 # parse line of git-diff-tree "raw" output
2156 sub parse_difftree_raw_line {
2157         my $line = shift;
2158         my %res;
2159
2160         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2161         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2162         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2163                 $res{'from_mode'} = $1;
2164                 $res{'to_mode'} = $2;
2165                 $res{'from_id'} = $3;
2166                 $res{'to_id'} = $4;
2167                 $res{'status'} = $res{'status_str'} = $5;
2168                 $res{'similarity'} = $6;
2169                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2170                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2171                 } else {
2172                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2173                 }
2174         }
2175         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2176         # combined diff (for merge commit)
2177         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2178                 $res{'nparents'}  = length($1);
2179                 $res{'from_mode'} = [ split(' ', $2) ];
2180                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2181                 $res{'from_id'} = [ split(' ', $3) ];
2182                 $res{'to_id'} = pop @{$res{'from_id'}};
2183                 $res{'status_str'} = $4;
2184                 $res{'status'} = [ split('', $4) ];
2185                 $res{'to_file'} = unquote($5);
2186         }
2187         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2188         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2189                 $res{'commit'} = $1;
2190         }
2191
2192         return wantarray ? %res : \%res;
2193 }
2194
2195 # wrapper: return parsed line of git-diff-tree "raw" output
2196 # (the argument might be raw line, or parsed info)
2197 sub parsed_difftree_line {
2198         my $line_or_ref = shift;
2199
2200         if (ref($line_or_ref) eq "HASH") {
2201                 # pre-parsed (or generated by hand)
2202                 return $line_or_ref;
2203         } else {
2204                 return parse_difftree_raw_line($line_or_ref);
2205         }
2206 }
2207
2208 # parse line of git-ls-tree output
2209 sub parse_ls_tree_line ($;%) {
2210         my $line = shift;
2211         my %opts = @_;
2212         my %res;
2213
2214         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2215         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2216
2217         $res{'mode'} = $1;
2218         $res{'type'} = $2;
2219         $res{'hash'} = $3;
2220         if ($opts{'-z'}) {
2221                 $res{'name'} = $4;
2222         } else {
2223                 $res{'name'} = unquote($4);
2224         }
2225
2226         return wantarray ? %res : \%res;
2227 }
2228
2229 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2230 sub parse_from_to_diffinfo {
2231         my ($diffinfo, $from, $to, @parents) = @_;
2232
2233         if ($diffinfo->{'nparents'}) {
2234                 # combined diff
2235                 $from->{'file'} = [];
2236                 $from->{'href'} = [];
2237                 fill_from_file_info($diffinfo, @parents)
2238                         unless exists $diffinfo->{'from_file'};
2239                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2240                         $from->{'file'}[$i] =
2241                                 defined $diffinfo->{'from_file'}[$i] ?
2242                                         $diffinfo->{'from_file'}[$i] :
2243                                         $diffinfo->{'to_file'};
2244                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2245                                 $from->{'href'}[$i] = href(action=>"blob",
2246                                                            hash_base=>$parents[$i],
2247                                                            hash=>$diffinfo->{'from_id'}[$i],
2248                                                            file_name=>$from->{'file'}[$i]);
2249                         } else {
2250                                 $from->{'href'}[$i] = undef;
2251                         }
2252                 }
2253         } else {
2254                 # ordinary (not combined) diff
2255                 $from->{'file'} = $diffinfo->{'from_file'};
2256                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2257                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2258                                                hash=>$diffinfo->{'from_id'},
2259                                                file_name=>$from->{'file'});
2260                 } else {
2261                         delete $from->{'href'};
2262                 }
2263         }
2264
2265         $to->{'file'} = $diffinfo->{'to_file'};
2266         if (!is_deleted($diffinfo)) { # file exists in result
2267                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2268                                      hash=>$diffinfo->{'to_id'},
2269                                      file_name=>$to->{'file'});
2270         } else {
2271                 delete $to->{'href'};
2272         }
2273 }
2274
2275 ## ......................................................................
2276 ## parse to array of hashes functions
2277
2278 sub git_get_heads_list {
2279         my $limit = shift;
2280         my @headslist;
2281
2282         open my $fd, '-|', git_cmd(), 'for-each-ref',
2283                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2284                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2285                 'refs/heads'
2286                 or return;
2287         while (my $line = <$fd>) {
2288                 my %ref_item;
2289
2290                 chomp $line;
2291                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2292                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2293                 my ($committer, $epoch, $tz) =
2294                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2295                 $ref_item{'fullname'}  = $name;
2296                 $name =~ s!^refs/heads/!!;
2297
2298                 $ref_item{'name'}  = $name;
2299                 $ref_item{'id'}    = $hash;
2300                 $ref_item{'title'} = $title || '(no commit message)';
2301                 $ref_item{'epoch'} = $epoch;
2302                 if ($epoch) {
2303                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2304                 } else {
2305                         $ref_item{'age'} = "unknown";
2306                 }
2307
2308                 push @headslist, \%ref_item;
2309         }
2310         close $fd;
2311
2312         return wantarray ? @headslist : \@headslist;
2313 }
2314
2315 sub git_get_tags_list {
2316         my $limit = shift;
2317         my @tagslist;
2318
2319         open my $fd, '-|', git_cmd(), 'for-each-ref',
2320                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2321                 '--format=%(objectname) %(objecttype) %(refname) '.
2322                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2323                 'refs/tags'
2324                 or return;
2325         while (my $line = <$fd>) {
2326                 my %ref_item;
2327
2328                 chomp $line;
2329                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2330                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2331                 my ($creator, $epoch, $tz) =
2332                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2333                 $ref_item{'fullname'} = $name;
2334                 $name =~ s!^refs/tags/!!;
2335
2336                 $ref_item{'type'} = $type;
2337                 $ref_item{'id'} = $id;
2338                 $ref_item{'name'} = $name;
2339                 if ($type eq "tag") {
2340                         $ref_item{'subject'} = $title;
2341                         $ref_item{'reftype'} = $reftype;
2342                         $ref_item{'refid'}   = $refid;
2343                 } else {
2344                         $ref_item{'reftype'} = $type;
2345                         $ref_item{'refid'}   = $id;
2346                 }
2347
2348                 if ($type eq "tag" || $type eq "commit") {
2349                         $ref_item{'epoch'} = $epoch;
2350                         if ($epoch) {
2351                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2352                         } else {
2353                                 $ref_item{'age'} = "unknown";
2354                         }
2355                 }
2356
2357                 push @tagslist, \%ref_item;
2358         }
2359         close $fd;
2360
2361         return wantarray ? @tagslist : \@tagslist;
2362 }
2363
2364 ## ----------------------------------------------------------------------
2365 ## filesystem-related functions
2366
2367 sub get_file_owner {
2368         my $path = shift;
2369
2370         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2371         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2372         if (!defined $gcos) {
2373                 return undef;
2374         }
2375         my $owner = $gcos;
2376         $owner =~ s/[,;].*$//;
2377         return to_utf8($owner);
2378 }
2379
2380 ## ......................................................................
2381 ## mimetype related functions
2382
2383 sub mimetype_guess_file {
2384         my $filename = shift;
2385         my $mimemap = shift;
2386         -r $mimemap or return undef;
2387
2388         my %mimemap;
2389         open(MIME, $mimemap) or return undef;
2390         while (<MIME>) {
2391                 next if m/^#/; # skip comments
2392                 my ($mime, $exts) = split(/\t+/);
2393                 if (defined $exts) {
2394                         my @exts = split(/\s+/, $exts);
2395                         foreach my $ext (@exts) {
2396                                 $mimemap{$ext} = $mime;
2397                         }
2398                 }
2399         }
2400         close(MIME);
2401
2402         $filename =~ /\.([^.]*)$/;
2403         return $mimemap{$1};
2404 }
2405
2406 sub mimetype_guess {
2407         my $filename = shift;
2408         my $mime;
2409         $filename =~ /\./ or return undef;
2410
2411         if ($mimetypes_file) {
2412                 my $file = $mimetypes_file;
2413                 if ($file !~ m!^/!) { # if it is relative path
2414                         # it is relative to project
2415                         $file = "$projectroot/$project/$file";
2416                 }
2417                 $mime = mimetype_guess_file($filename, $file);
2418         }
2419         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2420         return $mime;
2421 }
2422
2423 sub blob_mimetype {
2424         my $fd = shift;
2425         my $filename = shift;
2426
2427         if ($filename) {
2428                 my $mime = mimetype_guess($filename);
2429                 $mime and return $mime;
2430         }
2431
2432         # just in case
2433         return $default_blob_plain_mimetype unless $fd;
2434
2435         if (-T $fd) {
2436                 return 'text/plain' .
2437                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2438         } elsif (! $filename) {
2439                 return 'application/octet-stream';
2440         } elsif ($filename =~ m/\.png$/i) {
2441                 return 'image/png';
2442         } elsif ($filename =~ m/\.gif$/i) {
2443                 return 'image/gif';
2444         } elsif ($filename =~ m/\.jpe?g$/i) {
2445                 return 'image/jpeg';
2446         } else {
2447                 return 'application/octet-stream';
2448         }
2449 }
2450
2451 ## ======================================================================
2452 ## functions printing HTML: header, footer, error page
2453
2454 sub git_header_html {
2455         my $status = shift || "200 OK";
2456         my $expires = shift;
2457
2458         my $title = "$site_name";
2459         if (defined $project) {
2460                 $title .= " - " . to_utf8($project);
2461                 if (defined $action) {
2462                         $title .= "/$action";
2463                         if (defined $file_name) {
2464                                 $title .= " - " . esc_path($file_name);
2465                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2466                                         $title .= "/";
2467                                 }
2468                         }
2469                 }
2470         }
2471         my $content_type;
2472         # require explicit support from the UA if we are to send the page as
2473         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2474         # we have to do this because MSIE sometimes globs '*/*', pretending to
2475         # support xhtml+xml but choking when it gets what it asked for.
2476         if (defined $cgi->http('HTTP_ACCEPT') &&
2477             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2478             $cgi->Accept('application/xhtml+xml') != 0) {
2479                 $content_type = 'application/xhtml+xml';
2480         } else {
2481                 $content_type = 'text/html';
2482         }
2483         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2484                            -status=> $status, -expires => $expires);
2485         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2486         print <<EOF;
2487 <?xml version="1.0" encoding="utf-8"?>
2488 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2489 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2490 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2491 <!-- git core binaries version $git_version -->
2492 <head>
2493 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2494 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2495 <meta name="robots" content="index, nofollow"/>
2496 <title>$title</title>
2497 EOF
2498 # print out each stylesheet that exist
2499         if (defined $stylesheet) {
2500 #provides backwards capability for those people who define style sheet in a config file
2501                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2502         } else {
2503                 foreach my $stylesheet (@stylesheets) {
2504                         next unless $stylesheet;
2505                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2506                 }
2507         }
2508         if (defined $project) {
2509                 printf('<link rel="alternate" title="%s log RSS feed" '.
2510                        'href="%s" type="application/rss+xml" />'."\n",
2511                        esc_param($project), href(action=>"rss"));
2512                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2513                        'href="%s" type="application/rss+xml" />'."\n",
2514                        esc_param($project), href(action=>"rss",
2515                                                  extra_options=>"--no-merges"));
2516                 printf('<link rel="alternate" title="%s log Atom feed" '.
2517                        'href="%s" type="application/atom+xml" />'."\n",
2518                        esc_param($project), href(action=>"atom"));
2519                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2520                        'href="%s" type="application/atom+xml" />'."\n",
2521                        esc_param($project), href(action=>"atom",
2522                                                  extra_options=>"--no-merges"));
2523         } else {
2524                 printf('<link rel="alternate" title="%s projects list" '.
2525                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2526                        $site_name, href(project=>undef, action=>"project_index"));
2527                 printf('<link rel="alternate" title="%s projects feeds" '.
2528                        'href="%s" type="text/x-opml"/>'."\n",
2529                        $site_name, href(project=>undef, action=>"opml"));
2530         }
2531         if (defined $favicon) {
2532                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2533         }
2534
2535         print "</head>\n" .
2536               "<body>\n";
2537
2538         if (-f $site_header) {
2539                 open (my $fd, $site_header);
2540                 print <$fd>;
2541                 close $fd;
2542         }
2543
2544         print "<div class=\"page_header\">\n" .
2545               $cgi->a({-href => esc_url($logo_url),
2546                        -title => $logo_label},
2547                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2548         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2549         if (defined $project) {
2550                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2551                 if (defined $action) {
2552                         print " / $action";
2553                 }
2554                 print "\n";
2555         }
2556         print "</div>\n";
2557
2558         my ($have_search) = gitweb_check_feature('search');
2559         if ((defined $project) && ($have_search)) {
2560                 if (!defined $searchtext) {
2561                         $searchtext = "";
2562                 }
2563                 my $search_hash;
2564                 if (defined $hash_base) {
2565                         $search_hash = $hash_base;
2566                 } elsif (defined $hash) {
2567                         $search_hash = $hash;
2568                 } else {
2569                         $search_hash = "HEAD";
2570                 }
2571                 my $action = $my_uri;
2572                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2573                 if ($use_pathinfo) {
2574                         $action .= "/$project";
2575                 } else {
2576                         $cgi->param("p", $project);
2577                 }
2578                 $cgi->param("a", "search");
2579                 $cgi->param("h", $search_hash);
2580                 print $cgi->startform(-method => "get", -action => $action) .
2581                       "<div class=\"search\">\n" .
2582                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2583                       $cgi->hidden(-name => "a") . "\n" .
2584                       $cgi->hidden(-name => "h") . "\n" .
2585                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2586                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2587                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2588                       " search:\n",
2589                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2590                       "<span title=\"Extended regular expression\">" .
2591                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2592                                      -checked => $search_use_regexp) .
2593                       "</span>" .
2594                       "</div>" .
2595                       $cgi->end_form() . "\n";
2596         }
2597 }
2598
2599 sub git_footer_html {
2600         print "<div class=\"page_footer\">\n";
2601         if (defined $project) {
2602                 my $descr = git_get_project_description($project);
2603                 if (defined $descr) {
2604                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2605                 }
2606                 print $cgi->a({-href => href(action=>"rss"),
2607                               -class => "rss_logo"}, "RSS") . " ";
2608                 print $cgi->a({-href => href(action=>"atom"),
2609                               -class => "rss_logo"}, "Atom") . "\n";
2610         } else {
2611                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2612                               -class => "rss_logo"}, "OPML") . " ";
2613                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2614                               -class => "rss_logo"}, "TXT") . "\n";
2615         }
2616         print "</div>\n" ;
2617
2618         if (-f $site_footer) {
2619                 open (my $fd, $site_footer);
2620                 print <$fd>;
2621                 close $fd;
2622         }
2623
2624         print "</body>\n" .
2625               "</html>";
2626 }
2627
2628 sub die_error {
2629         my $status = shift || "403 Forbidden";
2630         my $error = shift || "Malformed query, file missing or permission denied";
2631
2632         git_header_html($status);
2633         print <<EOF;
2634 <div class="page_body">
2635 <br /><br />
2636 $status - $error
2637 <br />
2638 </div>
2639 EOF
2640         git_footer_html();
2641         exit;
2642 }
2643
2644 ## ----------------------------------------------------------------------
2645 ## functions printing or outputting HTML: navigation
2646
2647 sub git_print_page_nav {
2648         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2649         $extra = '' if !defined $extra; # pager or formats
2650
2651         my @navs = qw(summary shortlog log commit commitdiff tree);
2652         if ($suppress) {
2653                 @navs = grep { $_ ne $suppress } @navs;
2654         }
2655
2656         my %arg = map { $_ => {action=>$_} } @navs;
2657         if (defined $head) {
2658                 for (qw(commit commitdiff)) {
2659                         $arg{$_}{'hash'} = $head;
2660                 }
2661                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2662                         for (qw(shortlog log)) {
2663                                 $arg{$_}{'hash'} = $head;
2664                         }
2665                 }
2666         }
2667         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2668         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2669
2670         print "<div class=\"page_nav\">\n" .
2671                 (join " | ",
2672                  map { $_ eq $current ?
2673                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2674                  } @navs);
2675         print "<br/>\n$extra<br/>\n" .
2676               "</div>\n";
2677 }
2678
2679 sub format_paging_nav {
2680         my ($action, $hash, $head, $page, $nrevs) = @_;
2681         my $paging_nav;
2682
2683
2684         if ($hash ne $head || $page) {
2685                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2686         } else {
2687                 $paging_nav .= "HEAD";
2688         }
2689
2690         if ($page > 0) {
2691                 $paging_nav .= " &sdot; " .
2692                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2693                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2694         } else {
2695                 $paging_nav .= " &sdot; prev";
2696         }
2697
2698         if ($nrevs >= (100 * ($page+1)-1)) {
2699                 $paging_nav .= " &sdot; " .
2700                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2701                                  -accesskey => "n", -title => "Alt-n"}, "next");
2702         } else {
2703                 $paging_nav .= " &sdot; next";
2704         }
2705
2706         return $paging_nav;
2707 }
2708
2709 ## ......................................................................
2710 ## functions printing or outputting HTML: div
2711
2712 sub git_print_header_div {
2713         my ($action, $title, $hash, $hash_base) = @_;
2714         my %args = ();
2715
2716         $args{'action'} = $action;
2717         $args{'hash'} = $hash if $hash;
2718         $args{'hash_base'} = $hash_base if $hash_base;
2719
2720         print "<div class=\"header\">\n" .
2721               $cgi->a({-href => href(%args), -class => "title"},
2722               $title ? $title : $action) .
2723               "\n</div>\n";
2724 }
2725
2726 #sub git_print_authorship (\%) {
2727 sub git_print_authorship {
2728         my $co = shift;
2729
2730         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2731         print "<div class=\"author_date\">" .
2732               esc_html($co->{'author_name'}) .
2733               " [$ad{'rfc2822'}";
2734         if ($ad{'hour_local'} < 6) {
2735                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2736                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2737         } else {
2738                 printf(" (%02d:%02d %s)",
2739                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2740         }
2741         print "]</div>\n";
2742 }
2743
2744 sub git_print_page_path {
2745         my $name = shift;
2746         my $type = shift;
2747         my $hb = shift;
2748
2749
2750         print "<div class=\"page_path\">";
2751         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2752                       -title => 'tree root'}, to_utf8("[$project]"));
2753         print " / ";
2754         if (defined $name) {
2755                 my @dirname = split '/', $name;
2756                 my $basename = pop @dirname;
2757                 my $fullname = '';
2758
2759                 foreach my $dir (@dirname) {
2760                         $fullname .= ($fullname ? '/' : '') . $dir;
2761                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2762                                                      hash_base=>$hb),
2763                                       -title => $fullname}, esc_path($dir));
2764                         print " / ";
2765                 }
2766                 if (defined $type && $type eq 'blob') {
2767                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2768                                                      hash_base=>$hb),
2769                                       -title => $name}, esc_path($basename));
2770                 } elsif (defined $type && $type eq 'tree') {
2771                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2772                                                      hash_base=>$hb),
2773                                       -title => $name}, esc_path($basename));
2774                         print " / ";
2775                 } else {
2776                         print esc_path($basename);
2777                 }
2778         }
2779         print "<br/></div>\n";
2780 }
2781
2782 # sub git_print_log (\@;%) {
2783 sub git_print_log ($;%) {
2784         my $log = shift;
2785         my %opts = @_;
2786
2787         if ($opts{'-remove_title'}) {
2788                 # remove title, i.e. first line of log
2789                 shift @$log;
2790         }
2791         # remove leading empty lines
2792         while (defined $log->[0] && $log->[0] eq "") {
2793                 shift @$log;
2794         }
2795
2796         # print log
2797         my $signoff = 0;
2798         my $empty = 0;
2799         foreach my $line (@$log) {
2800                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2801                         $signoff = 1;
2802                         $empty = 0;
2803                         if (! $opts{'-remove_signoff'}) {
2804                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2805                                 next;
2806                         } else {
2807                                 # remove signoff lines
2808                                 next;
2809                         }
2810                 } else {
2811                         $signoff = 0;
2812                 }
2813
2814                 # print only one empty line
2815                 # do not print empty line after signoff
2816                 if ($line eq "") {
2817                         next if ($empty || $signoff);
2818                         $empty = 1;
2819                 } else {
2820                         $empty = 0;
2821                 }
2822
2823                 print format_log_line_html($line) . "<br/>\n";
2824         }
2825
2826         if ($opts{'-final_empty_line'}) {
2827                 # end with single empty line
2828                 print "<br/>\n" unless $empty;
2829         }
2830 }
2831
2832 # return link target (what link points to)
2833 sub git_get_link_target {
2834         my $hash = shift;
2835         my $link_target;
2836
2837         # read link
2838         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2839                 or return;
2840         {
2841                 local $/;
2842                 $link_target = <$fd>;
2843         }
2844         close $fd
2845                 or return;
2846
2847         return $link_target;
2848 }
2849
2850 # given link target, and the directory (basedir) the link is in,
2851 # return target of link relative to top directory (top tree);
2852 # return undef if it is not possible (including absolute links).
2853 sub normalize_link_target {
2854         my ($link_target, $basedir, $hash_base) = @_;
2855
2856         # we can normalize symlink target only if $hash_base is provided
2857         return unless $hash_base;
2858
2859         # absolute symlinks (beginning with '/') cannot be normalized
2860         return if (substr($link_target, 0, 1) eq '/');
2861
2862         # normalize link target to path from top (root) tree (dir)
2863         my $path;
2864         if ($basedir) {
2865                 $path = $basedir . '/' . $link_target;
2866         } else {
2867                 # we are in top (root) tree (dir)
2868                 $path = $link_target;
2869         }
2870
2871         # remove //, /./, and /../
2872         my @path_parts;
2873         foreach my $part (split('/', $path)) {
2874                 # discard '.' and ''
2875                 next if (!$part || $part eq '.');
2876                 # handle '..'
2877                 if ($part eq '..') {
2878                         if (@path_parts) {
2879                                 pop @path_parts;
2880                         } else {
2881                                 # link leads outside repository (outside top dir)
2882                                 return;
2883                         }
2884                 } else {
2885                         push @path_parts, $part;
2886                 }
2887         }
2888         $path = join('/', @path_parts);
2889
2890         return $path;
2891 }
2892
2893 # print tree entry (row of git_tree), but without encompassing <tr> element
2894 sub git_print_tree_entry {
2895         my ($t, $basedir, $hash_base, $have_blame) = @_;
2896
2897         my %base_key = ();
2898         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2899
2900         # The format of a table row is: mode list link.  Where mode is
2901         # the mode of the entry, list is the name of the entry, an href,
2902         # and link is the action links of the entry.
2903
2904         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2905         if ($t->{'type'} eq "blob") {
2906                 print "<td class=\"list\">" .
2907                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2908                                                file_name=>"$basedir$t->{'name'}", %base_key),
2909                                 -class => "list"}, esc_path($t->{'name'}));
2910                 if (S_ISLNK(oct $t->{'mode'})) {
2911                         my $link_target = git_get_link_target($t->{'hash'});
2912                         if ($link_target) {
2913                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2914                                 if (defined $norm_target) {
2915                                         print " -> " .
2916                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2917                                                                      file_name=>$norm_target),
2918                                                        -title => $norm_target}, esc_path($link_target));
2919                                 } else {
2920                                         print " -> " . esc_path($link_target);
2921                                 }
2922                         }
2923                 }
2924                 print "</td>\n";
2925                 print "<td class=\"link\">";
2926                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2927                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2928                               "blob");
2929                 if ($have_blame) {
2930                         print " | " .
2931                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2932                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2933                                       "blame");
2934                 }
2935                 if (defined $hash_base) {
2936                         print " | " .
2937                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2938                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2939                                       "history");
2940                 }
2941                 print " | " .
2942                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2943                                                file_name=>"$basedir$t->{'name'}")},
2944                                 "raw");
2945                 print "</td>\n";
2946
2947         } elsif ($t->{'type'} eq "tree") {
2948                 print "<td class=\"list\">";
2949                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2950                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2951                               esc_path($t->{'name'}));
2952                 print "</td>\n";
2953                 print "<td class=\"link\">";
2954                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2955                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2956                               "tree");
2957                 if (defined $hash_base) {
2958                         print " | " .
2959                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2960                                                      file_name=>"$basedir$t->{'name'}")},
2961                                       "history");
2962                 }
2963                 print "</td>\n";
2964         } else {
2965                 # unknown object: we can only present history for it
2966                 # (this includes 'commit' object, i.e. submodule support)
2967                 print "<td class=\"list\">" .
2968                       esc_path($t->{'name'}) .
2969                       "</td>\n";
2970                 print "<td class=\"link\">";
2971                 if (defined $hash_base) {
2972                         print $cgi->a({-href => href(action=>"history",
2973                                                      hash_base=>$hash_base,
2974                                                      file_name=>"$basedir$t->{'name'}")},
2975                                       "history");
2976                 }
2977                 print "</td>\n";
2978         }
2979 }
2980
2981 ## ......................................................................
2982 ## functions printing large fragments of HTML
2983
2984 # get pre-image filenames for merge (combined) diff
2985 sub fill_from_file_info {
2986         my ($diff, @parents) = @_;
2987
2988         $diff->{'from_file'} = [ ];
2989         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2990         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2991                 if ($diff->{'status'}[$i] eq 'R' ||
2992                     $diff->{'status'}[$i] eq 'C') {
2993                         $diff->{'from_file'}[$i] =
2994                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2995                 }
2996         }
2997
2998         return $diff;
2999 }
3000
3001 # is current raw difftree line of file deletion
3002 sub is_deleted {
3003         my $diffinfo = shift;
3004
3005         return $diffinfo->{'status_str'} =~ /D/;
3006 }
3007
3008 # does patch correspond to [previous] difftree raw line
3009 # $diffinfo  - hashref of parsed raw diff format
3010 # $patchinfo - hashref of parsed patch diff format
3011 #              (the same keys as in $diffinfo)
3012 sub is_patch_split {
3013         my ($diffinfo, $patchinfo) = @_;
3014
3015         return defined $diffinfo && defined $patchinfo
3016                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3017 }
3018
3019
3020 sub git_difftree_body {
3021         my ($difftree, $hash, @parents) = @_;
3022         my ($parent) = $parents[0];
3023         my ($have_blame) = gitweb_check_feature('blame');
3024         print "<div class=\"list_head\">\n";
3025         if ($#{$difftree} > 10) {
3026                 print(($#{$difftree} + 1) . " files changed:\n");
3027         }
3028         print "</div>\n";
3029
3030         print "<table class=\"" .
3031               (@parents > 1 ? "combined " : "") .
3032               "diff_tree\">\n";
3033
3034         # header only for combined diff in 'commitdiff' view
3035         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3036         if ($has_header) {
3037                 # table header
3038                 print "<thead><tr>\n" .
3039                        "<th></th><th></th>\n"; # filename, patchN link
3040                 for (my $i = 0; $i < @parents; $i++) {
3041                         my $par = $parents[$i];
3042                         print "<th>" .
3043                               $cgi->a({-href => href(action=>"commitdiff",
3044                                                      hash=>$hash, hash_parent=>$par),
3045                                        -title => 'commitdiff to parent number ' .
3046                                                   ($i+1) . ': ' . substr($par,0,7)},
3047                                       $i+1) .
3048                               "&nbsp;</th>\n";
3049                 }
3050                 print "</tr></thead>\n<tbody>\n";
3051         }
3052
3053         my $alternate = 1;
3054         my $patchno = 0;
3055         foreach my $line (@{$difftree}) {
3056                 my $diff = parsed_difftree_line($line);
3057
3058                 if ($alternate) {
3059                         print "<tr class=\"dark\">\n";
3060                 } else {
3061                         print "<tr class=\"light\">\n";
3062                 }
3063                 $alternate ^= 1;
3064
3065                 if (exists $diff->{'nparents'}) { # combined diff
3066
3067                         fill_from_file_info($diff, @parents)
3068                                 unless exists $diff->{'from_file'};
3069
3070                         if (!is_deleted($diff)) {
3071                                 # file exists in the result (child) commit
3072                                 print "<td>" .
3073                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3074                                                              file_name=>$diff->{'to_file'},
3075                                                              hash_base=>$hash),
3076                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3077                                       "</td>\n";
3078                         } else {
3079                                 print "<td>" .
3080                                       esc_path($diff->{'to_file'}) .
3081                                       "</td>\n";
3082                         }
3083
3084                         if ($action eq 'commitdiff') {
3085                                 # link to patch
3086                                 $patchno++;
3087                                 print "<td class=\"link\">" .
3088                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3089                                       " | " .
3090                                       "</td>\n";
3091                         }
3092
3093                         my $has_history = 0;
3094                         my $not_deleted = 0;
3095                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3096                                 my $hash_parent = $parents[$i];
3097                                 my $from_hash = $diff->{'from_id'}[$i];
3098                                 my $from_path = $diff->{'from_file'}[$i];
3099                                 my $status = $diff->{'status'}[$i];
3100
3101                                 $has_history ||= ($status ne 'A');
3102                                 $not_deleted ||= ($status ne 'D');
3103
3104                                 if ($status eq 'A') {
3105                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3106                                 } elsif ($status eq 'D') {
3107                                         print "<td class=\"link\">" .
3108                                               $cgi->a({-href => href(action=>"blob",
3109                                                                      hash_base=>$hash,
3110                                                                      hash=>$from_hash,
3111                                                                      file_name=>$from_path)},
3112                                                       "blob" . ($i+1)) .
3113                                               " | </td>\n";
3114                                 } else {
3115                                         if ($diff->{'to_id'} eq $from_hash) {
3116                                                 print "<td class=\"link nochange\">";
3117                                         } else {
3118                                                 print "<td class=\"link\">";
3119                                         }
3120                                         print $cgi->a({-href => href(action=>"blobdiff",
3121                                                                      hash=>$diff->{'to_id'},
3122                                                                      hash_parent=>$from_hash,
3123                                                                      hash_base=>$hash,
3124                                                                      hash_parent_base=>$hash_parent,
3125                                                                      file_name=>$diff->{'to_file'},
3126                                                                      file_parent=>$from_path)},
3127                                                       "diff" . ($i+1)) .
3128                                               " | </td>\n";
3129                                 }
3130                         }
3131
3132                         print "<td class=\"link\">";
3133                         if ($not_deleted) {
3134                                 print $cgi->a({-href => href(action=>"blob",
3135                                                              hash=>$diff->{'to_id'},
3136                                                              file_name=>$diff->{'to_file'},
3137                                                              hash_base=>$hash)},
3138                                               "blob");
3139                                 print " | " if ($has_history);
3140                         }
3141                         if ($has_history) {
3142                                 print $cgi->a({-href => href(action=>"history",
3143                                                              file_name=>$diff->{'to_file'},
3144                                                              hash_base=>$hash)},
3145                                               "history");
3146                         }
3147                         print "</td>\n";
3148
3149                         print "</tr>\n";
3150                         next; # instead of 'else' clause, to avoid extra indent
3151                 }
3152                 # else ordinary diff
3153
3154                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3155                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3156                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3157                         $to_mode_oct = oct $diff->{'to_mode'};
3158                         if (S_ISREG($to_mode_oct)) { # only for regular file
3159                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3160                         }
3161                         $to_file_type = file_type($diff->{'to_mode'});
3162                 }
3163                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3164                         $from_mode_oct = oct $diff->{'from_mode'};
3165                         if (S_ISREG($to_mode_oct)) { # only for regular file
3166                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3167                         }
3168                         $from_file_type = file_type($diff->{'from_mode'});
3169                 }
3170
3171                 if ($diff->{'status'} eq "A") { # created
3172                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3173                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3174                         $mode_chng   .= "]</span>";
3175                         print "<td>";
3176                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3177                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3178                                       -class => "list"}, esc_path($diff->{'file'}));
3179                         print "</td>\n";
3180                         print "<td>$mode_chng</td>\n";
3181                         print "<td class=\"link\">";
3182                         if ($action eq 'commitdiff') {
3183                                 # link to patch
3184                                 $patchno++;
3185                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3186                                 print " | ";
3187                         }
3188                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3189                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3190                                       "blob");
3191                         print "</td>\n";
3192
3193                 } elsif ($diff->{'status'} eq "D") { # deleted
3194                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3195                         print "<td>";
3196                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3197                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3198                                        -class => "list"}, esc_path($diff->{'file'}));
3199                         print "</td>\n";
3200                         print "<td>$mode_chng</td>\n";
3201                         print "<td class=\"link\">";
3202                         if ($action eq 'commitdiff') {
3203                                 # link to patch
3204                                 $patchno++;
3205                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3206                                 print " | ";
3207                         }
3208                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3209                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3210                                       "blob") . " | ";
3211                         if ($have_blame) {
3212                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3213                                                              file_name=>$diff->{'file'})},
3214                                               "blame") . " | ";
3215                         }
3216                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3217                                                      file_name=>$diff->{'file'})},
3218                                       "history");
3219                         print "</td>\n";
3220
3221                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3222                         my $mode_chnge = "";
3223                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3224                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3225                                 if ($from_file_type ne $to_file_type) {
3226                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3227                                 }
3228                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3229                                         if ($from_mode_str && $to_mode_str) {
3230                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3231                                         } elsif ($to_mode_str) {
3232                                                 $mode_chnge .= " mode: $to_mode_str";
3233                                         }
3234                                 }
3235                                 $mode_chnge .= "]</span>\n";
3236                         }
3237                         print "<td>";
3238                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3239                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3240                                       -class => "list"}, esc_path($diff->{'file'}));
3241                         print "</td>\n";
3242                         print "<td>$mode_chnge</td>\n";
3243                         print "<td class=\"link\">";
3244                         if ($action eq 'commitdiff') {
3245                                 # link to patch
3246                                 $patchno++;
3247                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3248                                       " | ";
3249                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3250                                 # "commit" view and modified file (not onlu mode changed)
3251                                 print $cgi->a({-href => href(action=>"blobdiff",
3252                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3253                                                              hash_base=>$hash, hash_parent_base=>$parent,
3254                                                              file_name=>$diff->{'file'})},
3255                                               "diff") .
3256                                       " | ";
3257                         }
3258                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3259                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3260                                        "blob") . " | ";
3261                         if ($have_blame) {
3262                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3263                                                              file_name=>$diff->{'file'})},
3264                                               "blame") . " | ";
3265                         }
3266                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3267                                                      file_name=>$diff->{'file'})},
3268                                       "history");
3269                         print "</td>\n";
3270
3271                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3272                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3273                         my $nstatus = $status_name{$diff->{'status'}};
3274                         my $mode_chng = "";
3275                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3276                                 # mode also for directories, so we cannot use $to_mode_str
3277                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3278                         }
3279                         print "<td>" .
3280                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3281                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3282                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3283                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3284                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3285                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3286                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3287                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3288                               "<td class=\"link\">";
3289                         if ($action eq 'commitdiff') {
3290                                 # link to patch
3291                                 $patchno++;
3292                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3293                                       " | ";
3294                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3295                                 # "commit" view and modified file (not only pure rename or copy)
3296                                 print $cgi->a({-href => href(action=>"blobdiff",
3297                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3298                                                              hash_base=>$hash, hash_parent_base=>$parent,
3299                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3300                                               "diff") .
3301                                       " | ";
3302                         }
3303                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3304                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3305                                       "blob") . " | ";
3306                         if ($have_blame) {
3307                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3308                                                              file_name=>$diff->{'to_file'})},
3309                                               "blame") . " | ";
3310                         }
3311                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3312                                                     file_name=>$diff->{'to_file'})},
3313                                       "history");
3314                         print "</td>\n";
3315
3316                 } # we should not encounter Unmerged (U) or Unknown (X) status
3317                 print "</tr>\n";
3318         }
3319         print "</tbody>" if $has_header;
3320         print "</table>\n";
3321 }
3322
3323 sub git_patchset_body {
3324         my ($fd, $difftree, $hash, @hash_parents) = @_;
3325         my ($hash_parent) = $hash_parents[0];
3326
3327         my $is_combined = (@hash_parents > 1);
3328         my $patch_idx = 0;
3329         my $patch_number = 0;
3330         my $patch_line;
3331         my $diffinfo;
3332         my $to_name;
3333         my (%from, %to);
3334
3335         print "<div class=\"patchset\">\n";
3336
3337         # skip to first patch
3338         while ($patch_line = <$fd>) {
3339                 chomp $patch_line;
3340
3341                 last if ($patch_line =~ m/^diff /);
3342         }
3343
3344  PATCH:
3345         while ($patch_line) {
3346
3347                 # parse "git diff" header line
3348                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3349                         # $1 is from_name, which we do not use
3350                         $to_name = unquote($2);
3351                         $to_name =~ s!^b/!!;
3352                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3353                         # $1 is 'cc' or 'combined', which we do not use
3354                         $to_name = unquote($2);
3355                 } else {
3356                         $to_name = undef;
3357                 }
3358
3359                 # check if current patch belong to current raw line
3360                 # and parse raw git-diff line if needed
3361                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3362                         # this is continuation of a split patch
3363                         print "<div class=\"patch cont\">\n";
3364                 } else {
3365                         # advance raw git-diff output if needed
3366                         $patch_idx++ if defined $diffinfo;
3367
3368                         # read and prepare patch information
3369                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3370
3371                         # compact combined diff output can have some patches skipped
3372                         # find which patch (using pathname of result) we are at now;
3373                         if ($is_combined) {
3374                                 while ($to_name ne $diffinfo->{'to_file'}) {
3375                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3376                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3377                                               "</div>\n";  # class="patch"
3378
3379                                         $patch_idx++;
3380                                         $patch_number++;
3381
3382                                         last if $patch_idx > $#$difftree;
3383                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3384                                 }
3385                         }
3386
3387                         # modifies %from, %to hashes
3388                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3389
3390                         # this is first patch for raw difftree line with $patch_idx index
3391                         # we index @$difftree array from 0, but number patches from 1
3392                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3393                 }
3394
3395                 # git diff header
3396                 #assert($patch_line =~ m/^diff /) if DEBUG;
3397                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3398                 $patch_number++;
3399                 # print "git diff" header
3400                 print format_git_diff_header_line($patch_line, $diffinfo,
3401                                                   \%from, \%to);
3402
3403                 # print extended diff header
3404                 print "<div class=\"diff extended_header\">\n";
3405         EXTENDED_HEADER:
3406                 while ($patch_line = <$fd>) {
3407                         chomp $patch_line;
3408
3409                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3410
3411                         print format_extended_diff_header_line($patch_line, $diffinfo,
3412                                                                \%from, \%to);
3413                 }
3414                 print "</div>\n"; # class="diff extended_header"
3415
3416                 # from-file/to-file diff header
3417                 if (! $patch_line) {
3418                         print "</div>\n"; # class="patch"
3419                         last PATCH;
3420                 }
3421                 next PATCH if ($patch_line =~ m/^diff /);
3422                 #assert($patch_line =~ m/^---/) if DEBUG;
3423
3424                 my $last_patch_line = $patch_line;
3425                 $patch_line = <$fd>;
3426                 chomp $patch_line;
3427                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3428
3429                 print format_diff_from_to_header($last_patch_line, $patch_line,
3430                                                  $diffinfo, \%from, \%to,
3431                                                  @hash_parents);
3432
3433                 # the patch itself
3434         LINE:
3435                 while ($patch_line = <$fd>) {
3436                         chomp $patch_line;
3437
3438                         next PATCH if ($patch_line =~ m/^diff /);
3439
3440                         print format_diff_line($patch_line, \%from, \%to);
3441                 }
3442
3443         } continue {
3444                 print "</div>\n"; # class="patch"
3445         }
3446
3447         # for compact combined (--cc) format, with chunk and patch simpliciaction
3448         # patchset might be empty, but there might be unprocessed raw lines
3449         for (++$patch_idx if $patch_number > 0;
3450              $patch_idx < @$difftree;
3451              ++$patch_idx) {
3452                 # read and prepare patch information
3453                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3454
3455                 # generate anchor for "patch" links in difftree / whatchanged part
3456                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3457                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3458                       "</div>\n";  # class="patch"
3459
3460                 $patch_number++;
3461         }
3462
3463         if ($patch_number == 0) {
3464                 if (@hash_parents > 1) {
3465                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3466                 } else {
3467                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3468                 }
3469         }
3470
3471         print "</div>\n"; # class="patchset"
3472 }
3473
3474 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3475
3476 sub git_project_list_body {
3477         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3478
3479         my ($check_forks) = gitweb_check_feature('forks');
3480
3481         my @projects;
3482         foreach my $pr (@$projlist) {
3483                 my (@aa) = git_get_last_activity($pr->{'path'});
3484                 unless (@aa) {
3485                         next;
3486                 }
3487                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3488                 if (!defined $pr->{'descr'}) {
3489                         my $descr = git_get_project_description($pr->{'path'}) || "";
3490                         $pr->{'descr_long'} = to_utf8($descr);
3491                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3492                 }
3493                 if (!defined $pr->{'owner'}) {
3494                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3495                 }
3496                 if ($check_forks) {
3497                         my $pname = $pr->{'path'};
3498                         if (($pname =~ s/\.git$//) &&
3499                             ($pname !~ /\/$/) &&
3500                             (-d "$projectroot/$pname")) {
3501                                 $pr->{'forks'} = "-d $projectroot/$pname";
3502                         }
3503                         else {
3504                                 $pr->{'forks'} = 0;
3505                         }
3506                 }
3507                 push @projects, $pr;
3508         }
3509
3510         $order ||= $default_projects_order;
3511         $from = 0 unless defined $from;
3512         $to = $#projects if (!defined $to || $#projects < $to);
3513
3514         print "<table class=\"project_list\">\n";
3515         unless ($no_header) {
3516                 print "<tr>\n";
3517                 if ($check_forks) {
3518                         print "<th></th>\n";
3519                 }
3520                 if ($order eq "project") {
3521                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3522                         print "<th>Project</th>\n";
3523                 } else {
3524                         print "<th>" .
3525                               $cgi->a({-href => href(project=>undef, order=>'project'),
3526                                        -class => "header"}, "Project") .
3527                               "</th>\n";
3528                 }
3529                 if ($order eq "descr") {
3530                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3531                         print "<th>Description</th>\n";
3532                 } else {
3533                         print "<th>" .
3534                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3535                                        -class => "header"}, "Description") .
3536                               "</th>\n";
3537                 }
3538                 if ($order eq "owner") {
3539                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3540                         print "<th>Owner</th>\n";
3541                 } else {
3542                         print "<th>" .
3543                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3544                                        -class => "header"}, "Owner") .
3545                               "</th>\n";
3546                 }
3547                 if ($order eq "age") {
3548                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3549                         print "<th>Last Change</th>\n";
3550                 } else {
3551                         print "<th>" .
3552                               $cgi->a({-href => href(project=>undef, order=>'age'),
3553                                        -class => "header"}, "Last Change") .
3554                               "</th>\n";
3555                 }
3556                 print "<th></th>\n" .
3557                       "</tr>\n";
3558         }
3559         my $alternate = 1;
3560         for (my $i = $from; $i <= $to; $i++) {
3561                 my $pr = $projects[$i];
3562                 if ($alternate) {
3563                         print "<tr class=\"dark\">\n";
3564                 } else {
3565                         print "<tr class=\"light\">\n";
3566                 }
3567                 $alternate ^= 1;
3568                 if ($check_forks) {
3569                         print "<td>";
3570                         if ($pr->{'forks'}) {
3571                                 print "<!-- $pr->{'forks'} -->\n";
3572                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3573                         }
3574                         print "</td>\n";
3575                 }
3576                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3577                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3578                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3579                                         -class => "list", -title => $pr->{'descr_long'}},
3580                                         esc_html($pr->{'descr'})) . "</td>\n" .
3581                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3582                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3583                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3584                       "<td class=\"link\">" .
3585                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3586                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3587                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3588                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3589                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3590                       "</td>\n" .
3591                       "</tr>\n";
3592         }
3593         if (defined $extra) {
3594                 print "<tr>\n";
3595                 if ($check_forks) {
3596                         print "<td></td>\n";
3597                 }
3598                 print "<td colspan=\"5\">$extra</td>\n" .
3599                       "</tr>\n";
3600         }
3601         print "</table>\n";
3602 }
3603
3604 sub git_shortlog_body {
3605         # uses global variable $project
3606         my ($commitlist, $from, $to, $refs, $extra) = @_;
3607
3608         $from = 0 unless defined $from;
3609         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3610
3611         print "<table class=\"shortlog\">\n";
3612         my $alternate = 1;
3613         for (my $i = $from; $i <= $to; $i++) {
3614                 my %co = %{$commitlist->[$i]};
3615                 my $commit = $co{'id'};
3616                 my $ref = format_ref_marker($refs, $commit);
3617                 if ($alternate) {
3618                         print "<tr class=\"dark\">\n";
3619                 } else {
3620                         print "<tr class=\"light\">\n";
3621                 }
3622                 $alternate ^= 1;
3623                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3624                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3625                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3626                       "<td><i>" . $author . "</i></td>\n" .
3627                       "<td>";
3628                 print format_subject_html($co{'title'}, $co{'title_short'},
3629                                           href(action=>"commit", hash=>$commit), $ref);
3630                 print "</td>\n" .
3631                       "<td class=\"link\">" .
3632                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3633                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3634                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3635                 my $snapshot_links = format_snapshot_links($commit);
3636                 if (defined $snapshot_links) {
3637                         print " | " . $snapshot_links;
3638                 }
3639                 print "</td>\n" .
3640                       "</tr>\n";
3641         }
3642         if (defined $extra) {
3643                 print "<tr>\n" .
3644                       "<td colspan=\"4\">$extra</td>\n" .
3645                       "</tr>\n";
3646         }
3647         print "</table>\n";
3648 }
3649
3650 sub git_history_body {
3651         # Warning: assumes constant type (blob or tree) during history
3652         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3653
3654         $from = 0 unless defined $from;
3655         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3656
3657         print "<table class=\"history\">\n";
3658         my $alternate = 1;
3659         for (my $i = $from; $i <= $to; $i++) {
3660                 my %co = %{$commitlist->[$i]};
3661                 if (!%co) {
3662                         next;
3663                 }
3664                 my $commit = $co{'id'};
3665
3666                 my $ref = format_ref_marker($refs, $commit);
3667
3668                 if ($alternate) {
3669                         print "<tr class=\"dark\">\n";
3670                 } else {
3671                         print "<tr class=\"light\">\n";
3672                 }
3673                 $alternate ^= 1;
3674         # shortlog uses      chop_str($co{'author_name'}, 10)
3675                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3676                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3677                       "<td><i>" . $author . "</i></td>\n" .
3678                       "<td>";
3679                 # originally git_history used chop_str($co{'title'}, 50)
3680                 print format_subject_html($co{'title'}, $co{'title_short'},
3681                                           href(action=>"commit", hash=>$commit), $ref);
3682                 print "</td>\n" .
3683                       "<td class=\"link\">" .
3684                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3685                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3686
3687                 if ($ftype eq 'blob') {
3688                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3689                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3690                         if (defined $blob_current && defined $blob_parent &&
3691                                         $blob_current ne $blob_parent) {
3692                                 print " | " .
3693                                         $cgi->a({-href => href(action=>"blobdiff",
3694                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3695                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3696                                                                file_name=>$file_name)},
3697                                                 "diff to current");
3698                         }
3699                 }
3700                 print "</td>\n" .
3701                       "</tr>\n";
3702         }
3703         if (defined $extra) {
3704                 print "<tr>\n" .
3705                       "<td colspan=\"4\">$extra</td>\n" .
3706                       "</tr>\n";
3707         }
3708         print "</table>\n";
3709 }
3710
3711 sub git_tags_body {
3712         # uses global variable $project
3713         my ($taglist, $from, $to, $extra) = @_;
3714         $from = 0 unless defined $from;
3715         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3716
3717         print "<table class=\"tags\">\n";
3718         my $alternate = 1;
3719         for (my $i = $from; $i <= $to; $i++) {
3720                 my $entry = $taglist->[$i];
3721                 my %tag = %$entry;
3722                 my $comment = $tag{'subject'};
3723                 my $comment_short;
3724                 if (defined $comment) {
3725                         $comment_short = chop_str($comment, 30, 5);
3726                 }
3727                 if ($alternate) {
3728                         print "<tr class=\"dark\">\n";
3729                 } else {
3730                         print "<tr class=\"light\">\n";
3731                 }
3732                 $alternate ^= 1;
3733                 if (defined $tag{'age'}) {
3734                         print "<td><i>$tag{'age'}</i></td>\n";
3735                 } else {
3736                         print "<td></td>\n";
3737                 }
3738                 print "<td>" .
3739                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3740                                -class => "list name"}, esc_html($tag{'name'})) .
3741                       "</td>\n" .
3742                       "<td>";
3743                 if (defined $comment) {
3744                         print format_subject_html($comment, $comment_short,
3745                                                   href(action=>"tag", hash=>$tag{'id'}));
3746                 }
3747                 print "</td>\n" .
3748                       "<td class=\"selflink\">";
3749                 if ($tag{'type'} eq "tag") {
3750                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3751                 } else {
3752                         print "&nbsp;";
3753                 }
3754                 print "</td>\n" .
3755                       "<td class=\"link\">" . " | " .
3756                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3757                 if ($tag{'reftype'} eq "commit") {
3758                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3759                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3760                 } elsif ($tag{'reftype'} eq "blob") {
3761                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3762                 }
3763                 print "</td>\n" .
3764                       "</tr>";
3765         }
3766         if (defined $extra) {
3767                 print "<tr>\n" .
3768                       "<td colspan=\"5\">$extra</td>\n" .
3769                       "</tr>\n";
3770         }
3771         print "</table>\n";
3772 }
3773
3774 sub git_heads_body {
3775         # uses global variable $project
3776         my ($headlist, $head, $from, $to, $extra) = @_;
3777         $from = 0 unless defined $from;
3778         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3779
3780         print "<table class=\"heads\">\n";
3781         my $alternate = 1;
3782         for (my $i = $from; $i <= $to; $i++) {
3783                 my $entry = $headlist->[$i];
3784                 my %ref = %$entry;
3785                 my $curr = $ref{'id'} eq $head;
3786                 if ($alternate) {
3787                         print "<tr class=\"dark\">\n";
3788                 } else {
3789                         print "<tr class=\"light\">\n";
3790                 }
3791                 $alternate ^= 1;
3792                 print "<td><i>$ref{'age'}</i></td>\n" .
3793                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3794                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3795                                -class => "list name"},esc_html($ref{'name'})) .
3796                       "</td>\n" .
3797                       "<td class=\"link\">" .
3798                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3799                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3800                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3801                       "</td>\n" .
3802                       "</tr>";
3803         }
3804         if (defined $extra) {
3805                 print "<tr>\n" .
3806                       "<td colspan=\"3\">$extra</td>\n" .
3807                       "</tr>\n";
3808         }
3809         print "</table>\n";
3810 }
3811
3812 sub git_search_grep_body {
3813         my ($commitlist, $from, $to, $extra) = @_;
3814         $from = 0 unless defined $from;
3815         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3816
3817         print "<table class=\"commit_search\">\n";
3818         my $alternate = 1;
3819         for (my $i = $from; $i <= $to; $i++) {
3820                 my %co = %{$commitlist->[$i]};
3821                 if (!%co) {
3822                         next;
3823                 }
3824                 my $commit = $co{'id'};
3825                 if ($alternate) {
3826                         print "<tr class=\"dark\">\n";
3827                 } else {
3828                         print "<tr class=\"light\">\n";
3829                 }
3830                 $alternate ^= 1;
3831                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3832                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3833                       "<td><i>" . $author . "</i></td>\n" .
3834                       "<td>" .
3835                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3836                                -class => "list subject"},
3837                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3838                 my $comment = $co{'comment'};
3839                 foreach my $line (@$comment) {
3840                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3841                                 my ($lead, $match, $trail) = ($1, $2, $3);
3842                                 $match = chop_str($match, 70, 5, 'center');
3843                                 my $contextlen = int((80 - length($match))/2);
3844                                 $contextlen = 30 if ($contextlen > 30);
3845                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3846                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3847
3848                                 $lead  = esc_html($lead);
3849                                 $match = esc_html($match);
3850                                 $trail = esc_html($trail);
3851
3852                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3853                         }
3854                 }
3855                 print "</td>\n" .
3856                       "<td class=\"link\">" .
3857                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3858                       " | " .
3859                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3860                       " | " .
3861                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3862                 print "</td>\n" .
3863                       "</tr>\n";
3864         }
3865         if (defined $extra) {
3866                 print "<tr>\n" .
3867                       "<td colspan=\"3\">$extra</td>\n" .
3868                       "</tr>\n";
3869         }
3870         print "</table>\n";
3871 }
3872
3873 ## ======================================================================
3874 ## ======================================================================
3875 ## actions
3876
3877 sub git_project_list {
3878         my $order = $cgi->param('o');
3879         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3880                 die_error(undef, "Unknown order parameter");
3881         }
3882
3883         my @list = git_get_projects_list();
3884         if (!@list) {
3885                 die_error(undef, "No projects found");
3886         }
3887
3888         git_header_html();
3889         if (-f $home_text) {
3890                 print "<div class=\"index_include\">\n";
3891                 open (my $fd, $home_text);
3892                 print <$fd>;
3893                 close $fd;
3894                 print "</div>\n";
3895         }
3896         git_project_list_body(\@list, $order);
3897         git_footer_html();
3898 }
3899
3900 sub git_forks {
3901         my $order = $cgi->param('o');
3902         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3903                 die_error(undef, "Unknown order parameter");
3904         }
3905
3906         my @list = git_get_projects_list($project);
3907         if (!@list) {
3908                 die_error(undef, "No forks found");
3909         }
3910
3911         git_header_html();
3912         git_print_page_nav('','');
3913         git_print_header_div('summary', "$project forks");
3914         git_project_list_body(\@list, $order);
3915         git_footer_html();
3916 }
3917
3918 sub git_project_index {
3919         my @projects = git_get_projects_list($project);
3920
3921         print $cgi->header(
3922                 -type => 'text/plain',
3923                 -charset => 'utf-8',
3924                 -content_disposition => 'inline; filename="index.aux"');
3925
3926         foreach my $pr (@projects) {
3927                 if (!exists $pr->{'owner'}) {
3928                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3929                 }
3930
3931                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3932                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3933                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3934                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3935                 $path  =~ s/ /\+/g;
3936                 $owner =~ s/ /\+/g;
3937
3938                 print "$path $owner\n";
3939         }
3940 }
3941
3942 sub git_summary {
3943         my $descr = git_get_project_description($project) || "none";
3944         my %co = parse_commit("HEAD");
3945         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3946         my $head = $co{'id'};
3947
3948         my $owner = git_get_project_owner($project);
3949
3950         my $refs = git_get_references();
3951         # These get_*_list functions return one more to allow us to see if
3952         # there are more ...
3953         my @taglist  = git_get_tags_list(16);
3954         my @headlist = git_get_heads_list(16);
3955         my @forklist;
3956         my ($check_forks) = gitweb_check_feature('forks');
3957
3958         if ($check_forks) {
3959                 @forklist = git_get_projects_list($project);
3960         }
3961
3962         git_header_html();
3963         git_print_page_nav('summary','', $head);
3964
3965         print "<div class=\"title\">&nbsp;</div>\n";
3966         print "<table class=\"projects_list\">\n" .
3967               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3968               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3969         if (defined $cd{'rfc2822'}) {
3970                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3971         }
3972
3973         # use per project git URL list in $projectroot/$project/cloneurl
3974         # or make project git URL from git base URL and project name
3975         my $url_tag = "URL";
3976         my @url_list = git_get_project_url_list($project);
3977         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3978         foreach my $git_url (@url_list) {
3979                 next unless $git_url;
3980                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3981                 $url_tag = "";
3982         }
3983         print "</table>\n";
3984
3985         if (-s "$projectroot/$project/README.html") {
3986                 if (open my $fd, "$projectroot/$project/README.html") {
3987                         print "<div class=\"title\">readme</div>\n" .
3988                               "<div class=\"readme\">\n";
3989                         print $_ while (<$fd>);
3990                         print "\n</div>\n"; # class="readme"
3991                         close $fd;
3992                 }
3993         }
3994
3995         # we need to request one more than 16 (0..15) to check if
3996         # those 16 are all
3997         my @commitlist = $head ? parse_commits($head, 17) : ();
3998         if (@commitlist) {
3999                 git_print_header_div('shortlog');
4000                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4001                                   $#commitlist <=  15 ? undef :
4002                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4003         }
4004
4005         if (@taglist) {
4006                 git_print_header_div('tags');
4007                 git_tags_body(\@taglist, 0, 15,
4008                               $#taglist <=  15 ? undef :
4009                               $cgi->a({-href => href(action=>"tags")}, "..."));
4010         }
4011
4012         if (@headlist) {
4013                 git_print_header_div('heads');
4014                 git_heads_body(\@headlist, $head, 0, 15,
4015                                $#headlist <= 15 ? undef :
4016                                $cgi->a({-href => href(action=>"heads")}, "..."));
4017         }
4018
4019         if (@forklist) {
4020                 git_print_header_div('forks');
4021                 git_project_list_body(\@forklist, undef, 0, 15,
4022                                       $#forklist <= 15 ? undef :
4023                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4024                                       'noheader');
4025         }
4026
4027         git_footer_html();
4028 }
4029
4030 sub git_tag {
4031         my $head = git_get_head_hash($project);
4032         git_header_html();
4033         git_print_page_nav('','', $head,undef,$head);
4034         my %tag = parse_tag($hash);
4035
4036         if (! %tag) {
4037                 die_error(undef, "Unknown tag object");
4038         }
4039
4040         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4041         print "<div class=\"title_text\">\n" .
4042               "<table class=\"object_header\">\n" .
4043               "<tr>\n" .
4044               "<td>object</td>\n" .
4045               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4046                                $tag{'object'}) . "</td>\n" .
4047               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4048                                               $tag{'type'}) . "</td>\n" .
4049               "</tr>\n";
4050         if (defined($tag{'author'})) {
4051                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4052                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4053                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4054                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4055                         "</td></tr>\n";
4056         }
4057         print "</table>\n\n" .
4058               "</div>\n";
4059         print "<div class=\"page_body\">";
4060         my $comment = $tag{'comment'};
4061         foreach my $line (@$comment) {
4062                 chomp $line;
4063                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4064         }
4065         print "</div>\n";
4066         git_footer_html();
4067 }
4068
4069 sub git_blame2 {
4070         my $fd;
4071         my $ftype;
4072
4073         my ($have_blame) = gitweb_check_feature('blame');
4074         if (!$have_blame) {
4075                 die_error('403 Permission denied', "Permission denied");
4076         }
4077         die_error('404 Not Found', "File name not defined") if (!$file_name);
4078         $hash_base ||= git_get_head_hash($project);
4079         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4080         my %co = parse_commit($hash_base)
4081                 or die_error(undef, "Reading commit failed");
4082         if (!defined $hash) {
4083                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4084                         or die_error(undef, "Error looking up file");
4085         }
4086         $ftype = git_get_type($hash);
4087         if ($ftype !~ "blob") {
4088                 die_error('400 Bad Request', "Object is not a blob");
4089         }
4090         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4091               $file_name, $hash_base)
4092                 or die_error(undef, "Open git-blame failed");
4093         git_header_html();
4094         my $formats_nav =
4095                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4096                         "blob") .
4097                 " | " .
4098                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4099                         "history") .
4100                 " | " .
4101                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4102                         "HEAD");
4103         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4104         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4105         git_print_page_path($file_name, $ftype, $hash_base);
4106         my @rev_color = (qw(light2 dark2));
4107         my $num_colors = scalar(@rev_color);
4108         my $current_color = 0;
4109         my $last_rev;
4110         print <<HTML;
4111 <div class="page_body">
4112 <table class="blame">
4113 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4114 HTML
4115         my %metainfo = ();
4116         while (1) {
4117                 $_ = <$fd>;
4118                 last unless defined $_;
4119                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4120                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4121                 if (!exists $metainfo{$full_rev}) {
4122                         $metainfo{$full_rev} = {};
4123                 }
4124                 my $meta = $metainfo{$full_rev};
4125                 while (<$fd>) {
4126                         last if (s/^\t//);
4127                         if (/^(\S+) (.*)$/) {
4128                                 $meta->{$1} = $2;
4129                         }
4130                 }
4131                 my $data = $_;
4132                 chomp $data;
4133                 my $rev = substr($full_rev, 0, 8);
4134                 my $author = $meta->{'author'};
4135                 my %date = parse_date($meta->{'author-time'},
4136                                       $meta->{'author-tz'});
4137                 my $date = $date{'iso-tz'};
4138                 if ($group_size) {
4139                         $current_color = ++$current_color % $num_colors;
4140                 }
4141                 print "<tr class=\"$rev_color[$current_color]\">\n";
4142                 if ($group_size) {
4143                         print "<td class=\"sha1\"";
4144                         print " title=\"". esc_html($author) . ", $date\"";
4145                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4146                         print ">";
4147                         print $cgi->a({-href => href(action=>"commit",
4148                                                      hash=>$full_rev,
4149                                                      file_name=>$file_name)},
4150                                       esc_html($rev));
4151                         print "</td>\n";
4152                 }
4153                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4154                         or die_error(undef, "Open git-rev-parse failed");
4155                 my $parent_commit = <$dd>;
4156                 close $dd;
4157                 chomp($parent_commit);
4158                 my $blamed = href(action => 'blame',
4159                                   file_name => $meta->{'filename'},
4160                                   hash_base => $parent_commit);
4161                 print "<td class=\"linenr\">";
4162                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4163                                 -id => "l$lineno",
4164                                 -class => "linenr" },
4165                               esc_html($lineno));
4166                 print "</td>";
4167                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4168                 print "</tr>\n";
4169         }
4170         print "</table>\n";
4171         print "</div>";
4172         close $fd
4173                 or print "Reading blob failed\n";
4174         git_footer_html();
4175 }
4176
4177 sub git_blame {
4178         my $fd;
4179
4180         my ($have_blame) = gitweb_check_feature('blame');
4181         if (!$have_blame) {
4182                 die_error('403 Permission denied', "Permission denied");
4183         }
4184         die_error('404 Not Found', "File name not defined") if (!$file_name);
4185         $hash_base ||= git_get_head_hash($project);
4186         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4187         my %co = parse_commit($hash_base)
4188                 or die_error(undef, "Reading commit failed");
4189         if (!defined $hash) {
4190                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4191                         or die_error(undef, "Error lookup file");
4192         }
4193         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4194                 or die_error(undef, "Open git-annotate failed");
4195         git_header_html();
4196         my $formats_nav =
4197                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4198                         "blob") .
4199                 " | " .
4200                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4201                         "history") .
4202                 " | " .
4203                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4204                         "HEAD");
4205         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4206         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4207         git_print_page_path($file_name, 'blob', $hash_base);
4208         print "<div class=\"page_body\">\n";
4209         print <<HTML;
4210 <table class="blame">
4211   <tr>
4212     <th>Commit</th>
4213     <th>Age</th>
4214     <th>Author</th>
4215     <th>Line</th>
4216     <th>Data</th>
4217   </tr>
4218 HTML
4219         my @line_class = (qw(light dark));
4220         my $line_class_len = scalar (@line_class);
4221         my $line_class_num = $#line_class;
4222         while (my $line = <$fd>) {
4223                 my $long_rev;
4224                 my $short_rev;
4225                 my $author;
4226                 my $time;
4227                 my $lineno;
4228                 my $data;
4229                 my $age;
4230                 my $age_str;
4231                 my $age_class;
4232
4233                 chomp $line;
4234                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4235
4236                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4237                         $long_rev = $1;
4238                         $author   = $2;
4239                         $time     = $3;
4240                         $lineno   = $4;
4241                         $data     = $5;
4242                 } else {
4243                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4244                         next;
4245                 }
4246                 $short_rev  = substr ($long_rev, 0, 8);
4247                 $age        = time () - $time;
4248                 $age_str    = age_string ($age);
4249                 $age_str    =~ s/ /&nbsp;/g;
4250                 $age_class  = age_class($age);
4251                 $author     = esc_html ($author);
4252                 $author     =~ s/ /&nbsp;/g;
4253
4254                 $data = untabify($data);
4255                 $data = esc_html ($data);
4256
4257                 print <<HTML;
4258   <tr class="$line_class[$line_class_num]">
4259     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4260     <td class="$age_class">$age_str</td>
4261     <td>$author</td>
4262     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4263     <td class="pre">$data</td>
4264   </tr>
4265 HTML
4266         } # while (my $line = <$fd>)
4267         print "</table>\n\n";
4268         close $fd
4269                 or print "Reading blob failed.\n";
4270         print "</div>";
4271         git_footer_html();
4272 }
4273
4274 sub git_tags {
4275         my $head = git_get_head_hash($project);
4276         git_header_html();
4277         git_print_page_nav('','', $head,undef,$head);
4278         git_print_header_div('summary', $project);
4279
4280         my @tagslist = git_get_tags_list();
4281         if (@tagslist) {
4282                 git_tags_body(\@tagslist);
4283         }
4284         git_footer_html();
4285 }
4286
4287 sub git_heads {
4288         my $head = git_get_head_hash($project);
4289         git_header_html();
4290         git_print_page_nav('','', $head,undef,$head);
4291         git_print_header_div('summary', $project);
4292
4293         my @headslist = git_get_heads_list();
4294         if (@headslist) {
4295                 git_heads_body(\@headslist, $head);
4296         }
4297         git_footer_html();
4298 }
4299
4300 sub git_blob_plain {
4301         my $expires;
4302
4303         if (!defined $hash) {
4304                 if (defined $file_name) {
4305                         my $base = $hash_base || git_get_head_hash($project);
4306                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4307                                 or die_error(undef, "Error lookup file");
4308                 } else {
4309                         die_error(undef, "No file name defined");
4310                 }
4311         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4312                 # blobs defined by non-textual hash id's can be cached
4313                 $expires = "+1d";
4314         }
4315
4316         my $type = shift;
4317         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4318                 or die_error(undef, "Couldn't cat $file_name, $hash");
4319
4320         $type ||= blob_mimetype($fd, $file_name);
4321
4322         # save as filename, even when no $file_name is given
4323         my $save_as = "$hash";
4324         if (defined $file_name) {
4325                 $save_as = $file_name;
4326         } elsif ($type =~ m/^text\//) {
4327                 $save_as .= '.txt';
4328         }
4329
4330         print $cgi->header(
4331                 -type => "$type",
4332                 -expires=>$expires,
4333                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4334         undef $/;
4335         binmode STDOUT, ':raw';
4336         print <$fd>;
4337         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4338         $/ = "\n";
4339         close $fd;
4340 }
4341
4342 sub git_blob {
4343         my $expires;
4344
4345         if (!defined $hash) {
4346                 if (defined $file_name) {
4347                         my $base = $hash_base || git_get_head_hash($project);
4348                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4349                                 or die_error(undef, "Error lookup file");
4350                 } else {
4351                         die_error(undef, "No file name defined");
4352                 }
4353         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4354                 # blobs defined by non-textual hash id's can be cached
4355                 $expires = "+1d";
4356         }
4357
4358         my ($have_blame) = gitweb_check_feature('blame');
4359         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4360                 or die_error(undef, "Couldn't cat $file_name, $hash");
4361         my $mimetype = blob_mimetype($fd, $file_name);
4362         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4363                 close $fd;
4364                 return git_blob_plain($mimetype);
4365         }
4366         # we can have blame only for text/* mimetype
4367         $have_blame &&= ($mimetype =~ m!^text/!);
4368
4369         git_header_html(undef, $expires);
4370         my $formats_nav = '';
4371         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4372                 if (defined $file_name) {
4373                         if ($have_blame) {
4374                                 $formats_nav .=
4375                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4376                                                 "blame") .
4377                                         " | ";
4378                         }
4379                         $formats_nav .=
4380                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4381                                         "history") .
4382                                 " | " .
4383                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4384                                         "raw") .
4385                                 " | " .
4386                                 $cgi->a({-href => href(action=>"blob",
4387                                                        hash_base=>"HEAD", file_name=>$file_name)},
4388                                         "HEAD");
4389                 } else {
4390                         $formats_nav .=
4391                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4392                                         "raw");
4393                 }
4394                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4395                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4396         } else {
4397                 print "<div class=\"page_nav\">\n" .
4398                       "<br/><br/></div>\n" .
4399                       "<div class=\"title\">$hash</div>\n";
4400         }
4401         git_print_page_path($file_name, "blob", $hash_base);
4402         print "<div class=\"page_body\">\n";
4403         if ($mimetype =~ m!^image/!) {
4404                 print qq!<img type="$mimetype"!;
4405                 if ($file_name) {
4406                         print qq! alt="$file_name" title="$file_name"!;
4407                 }
4408                 print qq! src="! .
4409                       href(action=>"blob_plain", hash=>$hash,
4410                            hash_base=>$hash_base, file_name=>$file_name) .
4411                       qq!" />\n!;
4412         } else {
4413                 my $nr;
4414                 while (my $line = <$fd>) {
4415                         chomp $line;
4416                         $nr++;
4417                         $line = untabify($line);
4418                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4419                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4420                 }
4421         }
4422         close $fd
4423                 or print "Reading blob failed.\n";
4424         print "</div>";
4425         git_footer_html();
4426 }
4427
4428 sub git_tree {
4429         if (!defined $hash_base) {
4430                 $hash_base = "HEAD";
4431         }
4432         if (!defined $hash) {
4433                 if (defined $file_name) {
4434                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4435                 } else {
4436                         $hash = $hash_base;
4437                 }
4438         }
4439         $/ = "\0";
4440         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4441                 or die_error(undef, "Open git-ls-tree failed");
4442         my @entries = map { chomp; $_ } <$fd>;
4443         close $fd or die_error(undef, "Reading tree failed");
4444         $/ = "\n";
4445
4446         my $refs = git_get_references();
4447         my $ref = format_ref_marker($refs, $hash_base);
4448         git_header_html();
4449         my $basedir = '';
4450         my ($have_blame) = gitweb_check_feature('blame');
4451         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4452                 my @views_nav = ();
4453                 if (defined $file_name) {
4454                         push @views_nav,
4455                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4456                                         "history"),
4457                                 $cgi->a({-href => href(action=>"tree",
4458                                                        hash_base=>"HEAD", file_name=>$file_name)},
4459                                         "HEAD"),
4460                 }
4461                 my $snapshot_links = format_snapshot_links($hash);
4462                 if (defined $snapshot_links) {
4463                         # FIXME: Should be available when we have no hash base as well.
4464                         push @views_nav, $snapshot_links;
4465                 }
4466                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4467                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4468         } else {
4469                 undef $hash_base;
4470                 print "<div class=\"page_nav\">\n";
4471                 print "<br/><br/></div>\n";
4472                 print "<div class=\"title\">$hash</div>\n";
4473         }
4474         if (defined $file_name) {
4475                 $basedir = $file_name;
4476                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4477                         $basedir .= '/';
4478                 }
4479         }
4480         git_print_page_path($file_name, 'tree', $hash_base);
4481         print "<div class=\"page_body\">\n";
4482         print "<table class=\"tree\">\n";
4483         my $alternate = 1;
4484         # '..' (top directory) link if possible
4485         if (defined $hash_base &&
4486             defined $file_name && $file_name =~ m![^/]+$!) {
4487                 if ($alternate) {
4488                         print "<tr class=\"dark\">\n";
4489                 } else {
4490                         print "<tr class=\"light\">\n";
4491                 }
4492                 $alternate ^= 1;
4493
4494                 my $up = $file_name;
4495                 $up =~ s!/?[^/]+$!!;
4496                 undef $up unless $up;
4497                 # based on git_print_tree_entry
4498                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4499                 print '<td class="list">';
4500                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4501                                              file_name=>$up)},
4502                               "..");
4503                 print "</td>\n";
4504                 print "<td class=\"link\"></td>\n";
4505
4506                 print "</tr>\n";
4507         }
4508         foreach my $line (@entries) {
4509                 my %t = parse_ls_tree_line($line, -z => 1);
4510
4511                 if ($alternate) {
4512                         print "<tr class=\"dark\">\n";
4513                 } else {
4514                         print "<tr class=\"light\">\n";
4515                 }
4516                 $alternate ^= 1;
4517
4518                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4519
4520                 print "</tr>\n";
4521         }
4522         print "</table>\n" .
4523               "</div>";
4524         git_footer_html();
4525 }
4526
4527 sub git_snapshot {
4528         my @supported_fmts = gitweb_check_feature('snapshot');
4529         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4530
4531         my $format = $cgi->param('sf');
4532         if (!@supported_fmts) {
4533                 die_error('403 Permission denied', "Permission denied");
4534         }
4535         # default to first supported snapshot format
4536         $format ||= $supported_fmts[0];
4537         if ($format !~ m/^[a-z0-9]+$/) {
4538                 die_error(undef, "Invalid snapshot format parameter");
4539         } elsif (!exists($known_snapshot_formats{$format})) {
4540                 die_error(undef, "Unknown snapshot format");
4541         } elsif (!grep($_ eq $format, @supported_fmts)) {
4542                 die_error(undef, "Unsupported snapshot format");
4543         }
4544
4545         if (!defined $hash) {
4546                 $hash = git_get_head_hash($project);
4547         }
4548
4549         my $git_command = git_cmd_str();
4550         my $name = $project;
4551         $name =~ s,([^/])/*\.git$,$1,;
4552         $name = basename($name);
4553         my $filename = to_utf8($name);
4554         $name =~ s/\047/\047\\\047\047/g;
4555         my $cmd;
4556         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4557         $cmd = "$git_command archive " .
4558                 "--format=$known_snapshot_formats{$format}{'format'} " .
4559                 "--prefix=\'$name\'/ $hash";
4560         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4561                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4562         }
4563
4564         print $cgi->header(
4565                 -type => $known_snapshot_formats{$format}{'type'},
4566                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4567                 -status => '200 OK');
4568
4569         open my $fd, "-|", $cmd
4570                 or die_error(undef, "Execute git-archive failed");
4571         binmode STDOUT, ':raw';
4572         print <$fd>;
4573         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4574         close $fd;
4575 }
4576
4577 sub git_log {
4578         my $head = git_get_head_hash($project);
4579         if (!defined $hash) {
4580                 $hash = $head;
4581         }
4582         if (!defined $page) {
4583                 $page = 0;
4584         }
4585         my $refs = git_get_references();
4586
4587         my @commitlist = parse_commits($hash, 101, (100 * $page));
4588
4589         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4590
4591         git_header_html();
4592         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4593
4594         if (!@commitlist) {
4595                 my %co = parse_commit($hash);
4596
4597                 git_print_header_div('summary', $project);
4598                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4599         }
4600         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4601         for (my $i = 0; $i <= $to; $i++) {
4602                 my %co = %{$commitlist[$i]};
4603                 next if !%co;
4604                 my $commit = $co{'id'};
4605                 my $ref = format_ref_marker($refs, $commit);
4606                 my %ad = parse_date($co{'author_epoch'});
4607                 git_print_header_div('commit',
4608                                "<span class=\"age\">$co{'age_string'}</span>" .
4609                                esc_html($co{'title'}) . $ref,
4610                                $commit);
4611                 print "<div class=\"title_text\">\n" .
4612                       "<div class=\"log_link\">\n" .
4613                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4614                       " | " .
4615                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4616                       " | " .
4617                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4618                       "<br/>\n" .
4619                       "</div>\n" .
4620                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4621                       "</div>\n";
4622
4623                 print "<div class=\"log_body\">\n";
4624                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4625                 print "</div>\n";
4626         }
4627         if ($#commitlist >= 100) {
4628                 print "<div class=\"page_nav\">\n";
4629                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4630                                -accesskey => "n", -title => "Alt-n"}, "next");
4631                 print "</div>\n";
4632         }
4633         git_footer_html();
4634 }
4635
4636 sub git_commit {
4637         $hash ||= $hash_base || "HEAD";
4638         my %co = parse_commit($hash);
4639         if (!%co) {
4640                 die_error(undef, "Unknown commit object");
4641         }
4642         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4643         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4644
4645         my $parent  = $co{'parent'};
4646         my $parents = $co{'parents'}; # listref
4647
4648         # we need to prepare $formats_nav before any parameter munging
4649         my $formats_nav;
4650         if (!defined $parent) {
4651                 # --root commitdiff
4652                 $formats_nav .= '(initial)';
4653         } elsif (@$parents == 1) {
4654                 # single parent commit
4655                 $formats_nav .=
4656                         '(parent: ' .
4657                         $cgi->a({-href => href(action=>"commit",
4658                                                hash=>$parent)},
4659                                 esc_html(substr($parent, 0, 7))) .
4660                         ')';
4661         } else {
4662                 # merge commit
4663                 $formats_nav .=
4664                         '(merge: ' .
4665                         join(' ', map {
4666                                 $cgi->a({-href => href(action=>"commit",
4667                                                        hash=>$_)},
4668                                         esc_html(substr($_, 0, 7)));
4669                         } @$parents ) .
4670                         ')';
4671         }
4672
4673         if (!defined $parent) {
4674                 $parent = "--root";
4675         }
4676         my @difftree;
4677         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4678                 @diff_opts,
4679                 (@$parents <= 1 ? $parent : '-c'),
4680                 $hash, "--"
4681                 or die_error(undef, "Open git-diff-tree failed");
4682         @difftree = map { chomp; $_ } <$fd>;
4683         close $fd or die_error(undef, "Reading git-diff-tree failed");
4684
4685         # non-textual hash id's can be cached
4686         my $expires;
4687         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4688                 $expires = "+1d";
4689         }
4690         my $refs = git_get_references();
4691         my $ref = format_ref_marker($refs, $co{'id'});
4692
4693         git_header_html(undef, $expires);
4694         git_print_page_nav('commit', '',
4695                            $hash, $co{'tree'}, $hash,
4696                            $formats_nav);
4697
4698         if (defined $co{'parent'}) {
4699                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4700         } else {
4701                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4702         }
4703         print "<div class=\"title_text\">\n" .
4704               "<table class=\"object_header\">\n";
4705         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4706               "<tr>" .
4707               "<td></td><td> $ad{'rfc2822'}";
4708         if ($ad{'hour_local'} < 6) {
4709                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4710                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4711         } else {
4712                 printf(" (%02d:%02d %s)",
4713                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4714         }
4715         print "</td>" .
4716               "</tr>\n";
4717         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4718         print "<tr><td></td><td> $cd{'rfc2822'}" .
4719               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4720               "</td></tr>\n";
4721         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4722         print "<tr>" .
4723               "<td>tree</td>" .
4724               "<td class=\"sha1\">" .
4725               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4726                        class => "list"}, $co{'tree'}) .
4727               "</td>" .
4728               "<td class=\"link\">" .
4729               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4730                       "tree");
4731         my $snapshot_links = format_snapshot_links($hash);
4732         if (defined $snapshot_links) {
4733                 print " | " . $snapshot_links;
4734         }
4735         print "</td>" .
4736               "</tr>\n";
4737
4738         foreach my $par (@$parents) {
4739                 print "<tr>" .
4740                       "<td>parent</td>" .
4741                       "<td class=\"sha1\">" .
4742                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4743                                class => "list"}, $par) .
4744                       "</td>" .
4745                       "<td class=\"link\">" .
4746                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4747                       " | " .
4748                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4749                       "</td>" .
4750                       "</tr>\n";
4751         }
4752         print "</table>".
4753               "</div>\n";
4754
4755         print "<div class=\"page_body\">\n";
4756         git_print_log($co{'comment'});
4757         print "</div>\n";
4758
4759         git_difftree_body(\@difftree, $hash, @$parents);
4760
4761         git_footer_html();
4762 }
4763
4764 sub git_object {
4765         # object is defined by:
4766         # - hash or hash_base alone
4767         # - hash_base and file_name
4768         my $type;
4769
4770         # - hash or hash_base alone
4771         if ($hash || ($hash_base && !defined $file_name)) {
4772                 my $object_id = $hash || $hash_base;
4773
4774                 my $git_command = git_cmd_str();
4775                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4776                         or die_error('404 Not Found', "Object does not exist");
4777                 $type = <$fd>;
4778                 chomp $type;
4779                 close $fd
4780                         or die_error('404 Not Found', "Object does not exist");
4781
4782         # - hash_base and file_name
4783         } elsif ($hash_base && defined $file_name) {
4784                 $file_name =~ s,/+$,,;
4785
4786                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4787                         or die_error('404 Not Found', "Base object does not exist");
4788
4789                 # here errors should not hapen
4790                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4791                         or die_error(undef, "Open git-ls-tree failed");
4792                 my $line = <$fd>;
4793                 close $fd;
4794
4795                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4796                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4797                         die_error('404 Not Found', "File or directory for given base does not exist");
4798                 }
4799                 $type = $2;
4800                 $hash = $3;
4801         } else {
4802                 die_error('404 Not Found', "Not enough information to find object");
4803         }
4804
4805         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4806                                           hash=>$hash, hash_base=>$hash_base,
4807                                           file_name=>$file_name),
4808                              -status => '302 Found');
4809 }
4810
4811 sub git_blobdiff {
4812         my $format = shift || 'html';
4813
4814         my $fd;
4815         my @difftree;
4816         my %diffinfo;
4817         my $expires;
4818
4819         # preparing $fd and %diffinfo for git_patchset_body
4820         # new style URI
4821         if (defined $hash_base && defined $hash_parent_base) {
4822                 if (defined $file_name) {
4823                         # read raw output
4824                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4825                                 $hash_parent_base, $hash_base,
4826                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4827                                 or die_error(undef, "Open git-diff-tree failed");
4828                         @difftree = map { chomp; $_ } <$fd>;
4829                         close $fd
4830                                 or die_error(undef, "Reading git-diff-tree failed");
4831                         @difftree
4832                                 or die_error('404 Not Found', "Blob diff not found");
4833
4834                 } elsif (defined $hash &&
4835                          $hash =~ /[0-9a-fA-F]{40}/) {
4836                         # try to find filename from $hash
4837
4838                         # read filtered raw output
4839                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4840                                 $hash_parent_base, $hash_base, "--"
4841                                 or die_error(undef, "Open git-diff-tree failed");
4842                         @difftree =
4843                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4844                                 # $hash == to_id
4845                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4846                                 map { chomp; $_ } <$fd>;
4847                         close $fd
4848                                 or die_error(undef, "Reading git-diff-tree failed");
4849                         @difftree
4850                                 or die_error('404 Not Found', "Blob diff not found");
4851
4852                 } else {
4853                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4854                 }
4855
4856                 if (@difftree > 1) {
4857                         die_error('404 Not Found', "Ambiguous blob diff specification");
4858                 }
4859
4860                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4861                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4862                 $file_name   ||= $diffinfo{'to_file'};
4863
4864                 $hash_parent ||= $diffinfo{'from_id'};
4865                 $hash        ||= $diffinfo{'to_id'};
4866
4867                 # non-textual hash id's can be cached
4868                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4869                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4870                         $expires = '+1d';
4871                 }
4872
4873                 # open patch output
4874                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4875                         '-p', ($format eq 'html' ? "--full-index" : ()),
4876                         $hash_parent_base, $hash_base,
4877                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4878                         or die_error(undef, "Open git-diff-tree failed");
4879         }
4880
4881         # old/legacy style URI
4882         if (!%diffinfo && # if new style URI failed
4883             defined $hash && defined $hash_parent) {
4884                 # fake git-diff-tree raw output
4885                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4886                 $diffinfo{'from_id'} = $hash_parent;
4887                 $diffinfo{'to_id'}   = $hash;
4888                 if (defined $file_name) {
4889                         if (defined $file_parent) {
4890                                 $diffinfo{'status'} = '2';
4891                                 $diffinfo{'from_file'} = $file_parent;
4892                                 $diffinfo{'to_file'}   = $file_name;
4893                         } else { # assume not renamed
4894                                 $diffinfo{'status'} = '1';
4895                                 $diffinfo{'from_file'} = $file_name;
4896                                 $diffinfo{'to_file'}   = $file_name;
4897                         }
4898                 } else { # no filename given
4899                         $diffinfo{'status'} = '2';
4900                         $diffinfo{'from_file'} = $hash_parent;
4901                         $diffinfo{'to_file'}   = $hash;
4902                 }
4903
4904                 # non-textual hash id's can be cached
4905                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4906                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4907                         $expires = '+1d';
4908                 }
4909
4910                 # open patch output
4911                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4912                         '-p', ($format eq 'html' ? "--full-index" : ()),
4913                         $hash_parent, $hash, "--"
4914                         or die_error(undef, "Open git-diff failed");
4915         } else  {
4916                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4917                         unless %diffinfo;
4918         }
4919
4920         # header
4921         if ($format eq 'html') {
4922                 my $formats_nav =
4923                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4924                                 "raw");
4925                 git_header_html(undef, $expires);
4926                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4927                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4928                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4929                 } else {
4930                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4931                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4932                 }
4933                 if (defined $file_name) {
4934                         git_print_page_path($file_name, "blob", $hash_base);
4935                 } else {
4936                         print "<div class=\"page_path\"></div>\n";
4937                 }
4938
4939         } elsif ($format eq 'plain') {
4940                 print $cgi->header(
4941                         -type => 'text/plain',
4942                         -charset => 'utf-8',
4943                         -expires => $expires,
4944                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4945
4946                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4947
4948         } else {
4949                 die_error(undef, "Unknown blobdiff format");
4950         }
4951
4952         # patch
4953         if ($format eq 'html') {
4954                 print "<div class=\"page_body\">\n";
4955
4956                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4957                 close $fd;
4958
4959                 print "</div>\n"; # class="page_body"
4960                 git_footer_html();
4961
4962         } else {
4963                 while (my $line = <$fd>) {
4964                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4965                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4966
4967                         print $line;
4968
4969                         last if $line =~ m!^\+\+\+!;
4970                 }
4971                 local $/ = undef;
4972                 print <$fd>;
4973                 close $fd;
4974         }
4975 }
4976
4977 sub git_blobdiff_plain {
4978         git_blobdiff('plain');
4979 }
4980
4981 sub git_commitdiff {
4982         my $format = shift || 'html';
4983         $hash ||= $hash_base || "HEAD";
4984         my %co = parse_commit($hash);
4985         if (!%co) {
4986                 die_error(undef, "Unknown commit object");
4987         }
4988
4989         # choose format for commitdiff for merge
4990         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4991                 $hash_parent = '--cc';
4992         }
4993         # we need to prepare $formats_nav before almost any parameter munging
4994         my $formats_nav;
4995         if ($format eq 'html') {
4996                 $formats_nav =
4997                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4998                                 "raw");
4999
5000                 if (defined $hash_parent &&
5001                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5002                         # commitdiff with two commits given
5003                         my $hash_parent_short = $hash_parent;
5004                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5005                                 $hash_parent_short = substr($hash_parent, 0, 7);
5006                         }
5007                         $formats_nav .=
5008                                 ' (from';
5009                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5010                                 if ($co{'parents'}[$i] eq $hash_parent) {
5011                                         $formats_nav .= ' parent ' . ($i+1);
5012                                         last;
5013                                 }
5014                         }
5015                         $formats_nav .= ': ' .
5016                                 $cgi->a({-href => href(action=>"commitdiff",
5017                                                        hash=>$hash_parent)},
5018                                         esc_html($hash_parent_short)) .
5019                                 ')';
5020                 } elsif (!$co{'parent'}) {
5021                         # --root commitdiff
5022                         $formats_nav .= ' (initial)';
5023                 } elsif (scalar @{$co{'parents'}} == 1) {
5024                         # single parent commit
5025                         $formats_nav .=
5026                                 ' (parent: ' .
5027                                 $cgi->a({-href => href(action=>"commitdiff",
5028                                                        hash=>$co{'parent'})},
5029                                         esc_html(substr($co{'parent'}, 0, 7))) .
5030                                 ')';
5031                 } else {
5032                         # merge commit
5033                         if ($hash_parent eq '--cc') {
5034                                 $formats_nav .= ' | ' .
5035                                         $cgi->a({-href => href(action=>"commitdiff",
5036                                                                hash=>$hash, hash_parent=>'-c')},
5037                                                 'combined');
5038                         } else { # $hash_parent eq '-c'
5039                                 $formats_nav .= ' | ' .
5040                                         $cgi->a({-href => href(action=>"commitdiff",
5041                                                                hash=>$hash, hash_parent=>'--cc')},
5042                                                 'compact');
5043                         }
5044                         $formats_nav .=
5045                                 ' (merge: ' .
5046                                 join(' ', map {
5047                                         $cgi->a({-href => href(action=>"commitdiff",
5048                                                                hash=>$_)},
5049                                                 esc_html(substr($_, 0, 7)));
5050                                 } @{$co{'parents'}} ) .
5051                                 ')';
5052                 }
5053         }
5054
5055         my $hash_parent_param = $hash_parent;
5056         if (!defined $hash_parent_param) {
5057                 # --cc for multiple parents, --root for parentless
5058                 $hash_parent_param =
5059                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5060         }
5061
5062         # read commitdiff
5063         my $fd;
5064         my @difftree;
5065         if ($format eq 'html') {
5066                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5067                         "--no-commit-id", "--patch-with-raw", "--full-index",
5068                         $hash_parent_param, $hash, "--"
5069                         or die_error(undef, "Open git-diff-tree failed");
5070
5071                 while (my $line = <$fd>) {
5072                         chomp $line;
5073                         # empty line ends raw part of diff-tree output
5074                         last unless $line;
5075                         push @difftree, scalar parse_difftree_raw_line($line);
5076                 }
5077
5078         } elsif ($format eq 'plain') {
5079                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5080                         '-p', $hash_parent_param, $hash, "--"
5081                         or die_error(undef, "Open git-diff-tree failed");
5082
5083         } else {
5084                 die_error(undef, "Unknown commitdiff format");
5085         }
5086
5087         # non-textual hash id's can be cached
5088         my $expires;
5089         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5090                 $expires = "+1d";
5091         }
5092
5093         # write commit message
5094         if ($format eq 'html') {
5095                 my $refs = git_get_references();
5096                 my $ref = format_ref_marker($refs, $co{'id'});
5097
5098                 git_header_html(undef, $expires);
5099                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5100                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5101                 git_print_authorship(\%co);
5102                 print "<div class=\"page_body\">\n";
5103                 if (@{$co{'comment'}} > 1) {
5104                         print "<div class=\"log\">\n";
5105                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5106                         print "</div>\n"; # class="log"
5107                 }
5108
5109         } elsif ($format eq 'plain') {
5110                 my $refs = git_get_references("tags");
5111                 my $tagname = git_get_rev_name_tags($hash);
5112                 my $filename = basename($project) . "-$hash.patch";
5113
5114                 print $cgi->header(
5115                         -type => 'text/plain',
5116                         -charset => 'utf-8',
5117                         -expires => $expires,
5118                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5119                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5120                 print "From: " . to_utf8($co{'author'}) . "\n";
5121                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5122                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5123
5124                 print "X-Git-Tag: $tagname\n" if $tagname;
5125                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5126
5127                 foreach my $line (@{$co{'comment'}}) {
5128                         print to_utf8($line) . "\n";
5129                 }
5130                 print "---\n\n";
5131         }
5132
5133         # write patch
5134         if ($format eq 'html') {
5135                 my $use_parents = !defined $hash_parent ||
5136                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5137                 git_difftree_body(\@difftree, $hash,
5138                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5139                 print "<br/>\n";
5140
5141                 git_patchset_body($fd, \@difftree, $hash,
5142                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5143                 close $fd;
5144                 print "</div>\n"; # class="page_body"
5145                 git_footer_html();
5146
5147         } elsif ($format eq 'plain') {
5148                 local $/ = undef;
5149                 print <$fd>;
5150                 close $fd
5151                         or print "Reading git-diff-tree failed\n";
5152         }
5153 }
5154
5155 sub git_commitdiff_plain {
5156         git_commitdiff('plain');
5157 }
5158
5159 sub git_history {
5160         if (!defined $hash_base) {
5161                 $hash_base = git_get_head_hash($project);
5162         }
5163         if (!defined $page) {
5164                 $page = 0;
5165         }
5166         my $ftype;
5167         my %co = parse_commit($hash_base);
5168         if (!%co) {
5169                 die_error(undef, "Unknown commit object");
5170         }
5171
5172         my $refs = git_get_references();
5173         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5174
5175         if (!defined $hash && defined $file_name) {
5176                 $hash = git_get_hash_by_path($hash_base, $file_name);
5177         }
5178         if (defined $hash) {
5179                 $ftype = git_get_type($hash);
5180         }
5181
5182         my @commitlist = parse_commits($hash_base, 101, (100 * $page), $file_name, "--full-history");
5183
5184         my $paging_nav = '';
5185         if ($page > 0) {
5186                 $paging_nav .=
5187                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5188                                                file_name=>$file_name)},
5189                                 "first");
5190                 $paging_nav .= " &sdot; " .
5191                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5192                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5193         } else {
5194                 $paging_nav .= "first";
5195                 $paging_nav .= " &sdot; prev";
5196         }
5197         my $next_link = '';
5198         if ($#commitlist >= 100) {
5199                 $next_link =
5200                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5201                                  -accesskey => "n", -title => "Alt-n"}, "next");
5202                 $paging_nav .= " &sdot; $next_link";
5203         } else {
5204                 $paging_nav .= " &sdot; next";
5205         }
5206
5207         git_header_html();
5208         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5209         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5210         git_print_page_path($file_name, $ftype, $hash_base);
5211
5212         git_history_body(\@commitlist, 0, 99,
5213                          $refs, $hash_base, $ftype, $next_link);
5214
5215         git_footer_html();
5216 }
5217
5218 sub git_search {
5219         my ($have_search) = gitweb_check_feature('search');
5220         if (!$have_search) {
5221                 die_error('403 Permission denied', "Permission denied");
5222         }
5223         if (!defined $searchtext) {
5224                 die_error(undef, "Text field empty");
5225         }
5226         if (!defined $hash) {
5227                 $hash = git_get_head_hash($project);
5228         }
5229         my %co = parse_commit($hash);
5230         if (!%co) {
5231                 die_error(undef, "Unknown commit object");
5232         }
5233         if (!defined $page) {
5234                 $page = 0;
5235         }
5236
5237         $searchtype ||= 'commit';
5238         if ($searchtype eq 'pickaxe') {
5239                 # pickaxe may take all resources of your box and run for several minutes
5240                 # with every query - so decide by yourself how public you make this feature
5241                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5242                 if (!$have_pickaxe) {
5243                         die_error('403 Permission denied', "Permission denied");
5244                 }
5245         }
5246         if ($searchtype eq 'grep') {
5247                 my ($have_grep) = gitweb_check_feature('grep');
5248                 if (!$have_grep) {
5249                         die_error('403 Permission denied', "Permission denied");
5250                 }
5251         }
5252
5253         git_header_html();
5254
5255         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5256                 my $greptype;
5257                 if ($searchtype eq 'commit') {
5258                         $greptype = "--grep=";
5259                 } elsif ($searchtype eq 'author') {
5260                         $greptype = "--author=";
5261                 } elsif ($searchtype eq 'committer') {
5262                         $greptype = "--committer=";
5263                 }
5264                 $greptype .= $searchtext;
5265                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5266                                                $greptype, '--regexp-ignore-case',
5267                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5268
5269                 my $paging_nav = '';
5270                 if ($page > 0) {
5271                         $paging_nav .=
5272                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5273                                                        searchtext=>$searchtext,
5274                                                        searchtype=>$searchtype)},
5275                                         "first");
5276                         $paging_nav .= " &sdot; " .
5277                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5278                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5279                 } else {
5280                         $paging_nav .= "first";
5281                         $paging_nav .= " &sdot; prev";
5282                 }
5283                 my $next_link = '';
5284                 if ($#commitlist >= 100) {
5285                         $next_link =
5286                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5287                                          -accesskey => "n", -title => "Alt-n"}, "next");
5288                         $paging_nav .= " &sdot; $next_link";
5289                 } else {
5290                         $paging_nav .= " &sdot; next";
5291                 }
5292
5293                 if ($#commitlist >= 100) {
5294                 }
5295
5296                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5297                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5298                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5299         }
5300
5301         if ($searchtype eq 'pickaxe') {
5302                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5303                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5304
5305                 print "<table class=\"pickaxe search\">\n";
5306                 my $alternate = 1;
5307                 $/ = "\n";
5308                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5309                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5310                         ($search_use_regexp ? '--pickaxe-regex' : ());
5311                 undef %co;
5312                 my @files;
5313                 while (my $line = <$fd>) {
5314                         chomp $line;
5315                         next unless $line;
5316
5317                         my %set = parse_difftree_raw_line($line);
5318                         if (defined $set{'commit'}) {
5319                                 # finish previous commit
5320                                 if (%co) {
5321                                         print "</td>\n" .
5322                                               "<td class=\"link\">" .
5323                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5324                                               " | " .
5325                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5326                                         print "</td>\n" .
5327                                               "</tr>\n";
5328                                 }
5329
5330                                 if ($alternate) {
5331                                         print "<tr class=\"dark\">\n";
5332                                 } else {
5333                                         print "<tr class=\"light\">\n";
5334                                 }
5335                                 $alternate ^= 1;
5336                                 %co = parse_commit($set{'commit'});
5337                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5338                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5339                                       "<td><i>$author</i></td>\n" .
5340                                       "<td>" .
5341                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5342                                               -class => "list subject"},
5343                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5344                         } elsif (defined $set{'to_id'}) {
5345                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5346
5347                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5348                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5349                                               -class => "list"},
5350                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5351                                       "<br/>\n";
5352                         }
5353                 }
5354                 close $fd;
5355
5356                 # finish last commit (warning: repetition!)
5357                 if (%co) {
5358                         print "</td>\n" .
5359                               "<td class=\"link\">" .
5360                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5361                               " | " .
5362                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5363                         print "</td>\n" .
5364                               "</tr>\n";
5365                 }
5366
5367                 print "</table>\n";
5368         }
5369
5370         if ($searchtype eq 'grep') {
5371                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5372                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5373
5374                 print "<table class=\"grep_search\">\n";
5375                 my $alternate = 1;
5376                 my $matches = 0;
5377                 $/ = "\n";
5378                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5379                         $search_use_regexp ? ('-E', '-i') : '-F',
5380                         $searchtext, $co{'tree'};
5381                 my $lastfile = '';
5382                 while (my $line = <$fd>) {
5383                         chomp $line;
5384                         my ($file, $lno, $ltext, $binary);
5385                         last if ($matches++ > 1000);
5386                         if ($line =~ /^Binary file (.+) matches$/) {
5387                                 $file = $1;
5388                                 $binary = 1;
5389                         } else {
5390                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5391                         }
5392                         if ($file ne $lastfile) {
5393                                 $lastfile and print "</td></tr>\n";
5394                                 if ($alternate++) {
5395                                         print "<tr class=\"dark\">\n";
5396                                 } else {
5397                                         print "<tr class=\"light\">\n";
5398                                 }
5399                                 print "<td class=\"list\">".
5400                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5401                                                                file_name=>"$file"),
5402                                                 -class => "list"}, esc_path($file));
5403                                 print "</td><td>\n";
5404                                 $lastfile = $file;
5405                         }
5406                         if ($binary) {
5407                                 print "<div class=\"binary\">Binary file</div>\n";
5408                         } else {
5409                                 $ltext = untabify($ltext);
5410                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5411                                         $ltext = esc_html($1, -nbsp=>1);
5412                                         $ltext .= '<span class="match">';
5413                                         $ltext .= esc_html($2, -nbsp=>1);
5414                                         $ltext .= '</span>';
5415                                         $ltext .= esc_html($3, -nbsp=>1);
5416                                 } else {
5417                                         $ltext = esc_html($ltext, -nbsp=>1);
5418                                 }
5419                                 print "<div class=\"pre\">" .
5420                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5421                                                                file_name=>"$file").'#l'.$lno,
5422                                                 -class => "linenr"}, sprintf('%4i', $lno))
5423                                         . ' ' .  $ltext . "</div>\n";
5424                         }
5425                 }
5426                 if ($lastfile) {
5427                         print "</td></tr>\n";
5428                         if ($matches > 1000) {
5429                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5430                         }
5431                 } else {
5432                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5433                 }
5434                 close $fd;
5435
5436                 print "</table>\n";
5437         }
5438         git_footer_html();
5439 }
5440
5441 sub git_search_help {
5442         git_header_html();
5443         git_print_page_nav('','', $hash,$hash,$hash);
5444         print <<EOT;
5445 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5446 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5447 the pattern entered is recognized as the POSIX extended
5448 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5449 insensitive).</p>
5450 <dl>
5451 <dt><b>commit</b></dt>
5452 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5453 EOT
5454         my ($have_grep) = gitweb_check_feature('grep');
5455         if ($have_grep) {
5456                 print <<EOT;
5457 <dt><b>grep</b></dt>
5458 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5459     a different one) are searched for the given pattern. On large trees, this search can take
5460 a while and put some strain on the server, so please use it with some consideration. Note that
5461 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5462 case-sensitive.</dd>
5463 EOT
5464         }
5465         print <<EOT;
5466 <dt><b>author</b></dt>
5467 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5468 <dt><b>committer</b></dt>
5469 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5470 EOT
5471         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5472         if ($have_pickaxe) {
5473                 print <<EOT;
5474 <dt><b>pickaxe</b></dt>
5475 <dd>All commits that caused the string to appear or disappear from any file (changes that
5476 added, removed or "modified" the string) will be listed. This search can take a while and
5477 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5478 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5479 EOT
5480         }
5481         print "</dl>\n";
5482         git_footer_html();
5483 }
5484
5485 sub git_shortlog {
5486         my $head = git_get_head_hash($project);
5487         if (!defined $hash) {
5488                 $hash = $head;
5489         }
5490         if (!defined $page) {
5491                 $page = 0;
5492         }
5493         my $refs = git_get_references();
5494
5495         my @commitlist = parse_commits($hash, 101, (100 * $page));
5496
5497         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5498         my $next_link = '';
5499         if ($#commitlist >= 100) {
5500                 $next_link =
5501                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5502                                  -accesskey => "n", -title => "Alt-n"}, "next");
5503         }
5504
5505         git_header_html();
5506         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5507         git_print_header_div('summary', $project);
5508
5509         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5510
5511         git_footer_html();
5512 }
5513
5514 ## ......................................................................
5515 ## feeds (RSS, Atom; OPML)
5516
5517 sub git_feed {
5518         my $format = shift || 'atom';
5519         my ($have_blame) = gitweb_check_feature('blame');
5520
5521         # Atom: http://www.atomenabled.org/developers/syndication/
5522         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5523         if ($format ne 'rss' && $format ne 'atom') {
5524                 die_error(undef, "Unknown web feed format");
5525         }
5526
5527         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5528         my $head = $hash || 'HEAD';
5529         my @commitlist = parse_commits($head, 150, 0, $file_name);
5530
5531         my %latest_commit;
5532         my %latest_date;
5533         my $content_type = "application/$format+xml";
5534         if (defined $cgi->http('HTTP_ACCEPT') &&
5535                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5536                 # browser (feed reader) prefers text/xml
5537                 $content_type = 'text/xml';
5538         }
5539         if (defined($commitlist[0])) {
5540                 %latest_commit = %{$commitlist[0]};
5541                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5542                 print $cgi->header(
5543                         -type => $content_type,
5544                         -charset => 'utf-8',
5545                         -last_modified => $latest_date{'rfc2822'});
5546         } else {
5547                 print $cgi->header(
5548                         -type => $content_type,
5549                         -charset => 'utf-8');
5550         }
5551
5552         # Optimization: skip generating the body if client asks only
5553         # for Last-Modified date.
5554         return if ($cgi->request_method() eq 'HEAD');
5555
5556         # header variables
5557         my $title = "$site_name - $project/$action";
5558         my $feed_type = 'log';
5559         if (defined $hash) {
5560                 $title .= " - '$hash'";
5561                 $feed_type = 'branch log';
5562                 if (defined $file_name) {
5563                         $title .= " :: $file_name";
5564                         $feed_type = 'history';
5565                 }
5566         } elsif (defined $file_name) {
5567                 $title .= " - $file_name";
5568                 $feed_type = 'history';
5569         }
5570         $title .= " $feed_type";
5571         my $descr = git_get_project_description($project);
5572         if (defined $descr) {
5573                 $descr = esc_html($descr);
5574         } else {
5575                 $descr = "$project " .
5576                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5577                          " feed";
5578         }
5579         my $owner = git_get_project_owner($project);
5580         $owner = esc_html($owner);
5581
5582         #header
5583         my $alt_url;
5584         if (defined $file_name) {
5585                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5586         } elsif (defined $hash) {
5587                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5588         } else {
5589                 $alt_url = href(-full=>1, action=>"summary");
5590         }
5591         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5592         if ($format eq 'rss') {
5593                 print <<XML;
5594 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5595 <channel>
5596 XML
5597                 print "<title>$title</title>\n" .
5598                       "<link>$alt_url</link>\n" .
5599                       "<description>$descr</description>\n" .
5600                       "<language>en</language>\n";
5601         } elsif ($format eq 'atom') {
5602                 print <<XML;
5603 <feed xmlns="http://www.w3.org/2005/Atom">
5604 XML
5605                 print "<title>$title</title>\n" .
5606                       "<subtitle>$descr</subtitle>\n" .
5607                       '<link rel="alternate" type="text/html" href="' .
5608                       $alt_url . '" />' . "\n" .
5609                       '<link rel="self" type="' . $content_type . '" href="' .
5610                       $cgi->self_url() . '" />' . "\n" .
5611                       "<id>" . href(-full=>1) . "</id>\n" .
5612                       # use project owner for feed author
5613                       "<author><name>$owner</name></author>\n";
5614                 if (defined $favicon) {
5615                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5616                 }
5617                 if (defined $logo_url) {
5618                         # not twice as wide as tall: 72 x 27 pixels
5619                         print "<logo>" . esc_url($logo) . "</logo>\n";
5620                 }
5621                 if (! %latest_date) {
5622                         # dummy date to keep the feed valid until commits trickle in:
5623                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5624                 } else {
5625                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5626                 }
5627         }
5628
5629         # contents
5630         for (my $i = 0; $i <= $#commitlist; $i++) {
5631                 my %co = %{$commitlist[$i]};
5632                 my $commit = $co{'id'};
5633                 # we read 150, we always show 30 and the ones more recent than 48 hours
5634                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5635                         last;
5636                 }
5637                 my %cd = parse_date($co{'author_epoch'});
5638
5639                 # get list of changed files
5640                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5641                         $co{'parent'} || "--root",
5642                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5643                         or next;
5644                 my @difftree = map { chomp; $_ } <$fd>;
5645                 close $fd
5646                         or next;
5647
5648                 # print element (entry, item)
5649                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5650                 if ($format eq 'rss') {
5651                         print "<item>\n" .
5652                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5653                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5654                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5655                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5656                               "<link>$co_url</link>\n" .
5657                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5658                               "<content:encoded>" .
5659                               "<![CDATA[\n";
5660                 } elsif ($format eq 'atom') {
5661                         print "<entry>\n" .
5662                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5663                               "<updated>$cd{'iso-8601'}</updated>\n" .
5664                               "<author>\n" .
5665                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5666                         if ($co{'author_email'}) {
5667                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5668                         }
5669                         print "</author>\n" .
5670                               # use committer for contributor
5671                               "<contributor>\n" .
5672                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5673                         if ($co{'committer_email'}) {
5674                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5675                         }
5676                         print "</contributor>\n" .
5677                               "<published>$cd{'iso-8601'}</published>\n" .
5678                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5679                               "<id>$co_url</id>\n" .
5680                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5681                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5682                 }
5683                 my $comment = $co{'comment'};
5684                 print "<pre>\n";
5685                 foreach my $line (@$comment) {
5686                         $line = esc_html($line);
5687                         print "$line\n";
5688                 }
5689                 print "</pre><ul>\n";
5690                 foreach my $difftree_line (@difftree) {
5691                         my %difftree = parse_difftree_raw_line($difftree_line);
5692                         next if !$difftree{'from_id'};
5693
5694                         my $file = $difftree{'file'} || $difftree{'to_file'};
5695
5696                         print "<li>" .
5697                               "[" .
5698                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5699                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5700                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5701                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5702                                       -title => "diff"}, 'D');
5703                         if ($have_blame) {
5704                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5705                                                              file_name=>$file, hash_base=>$commit),
5706                                               -title => "blame"}, 'B');
5707                         }
5708                         # if this is not a feed of a file history
5709                         if (!defined $file_name || $file_name ne $file) {
5710                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5711                                                              file_name=>$file, hash=>$commit),
5712                                               -title => "history"}, 'H');
5713                         }
5714                         $file = esc_path($file);
5715                         print "] ".
5716                               "$file</li>\n";
5717                 }
5718                 if ($format eq 'rss') {
5719                         print "</ul>]]>\n" .
5720                               "</content:encoded>\n" .
5721                               "</item>\n";
5722                 } elsif ($format eq 'atom') {
5723                         print "</ul>\n</div>\n" .
5724                               "</content>\n" .
5725                               "</entry>\n";
5726                 }
5727         }
5728
5729         # end of feed
5730         if ($format eq 'rss') {
5731                 print "</channel>\n</rss>\n";
5732         }       elsif ($format eq 'atom') {
5733                 print "</feed>\n";
5734         }
5735 }
5736
5737 sub git_rss {
5738         git_feed('rss');
5739 }
5740
5741 sub git_atom {
5742         git_feed('atom');
5743 }
5744
5745 sub git_opml {
5746         my @list = git_get_projects_list();
5747
5748         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5749         print <<XML;
5750 <?xml version="1.0" encoding="utf-8"?>
5751 <opml version="1.0">
5752 <head>
5753   <title>$site_name OPML Export</title>
5754 </head>
5755 <body>
5756 <outline text="git RSS feeds">
5757 XML
5758
5759         foreach my $pr (@list) {
5760                 my %proj = %$pr;
5761                 my $head = git_get_head_hash($proj{'path'});
5762                 if (!defined $head) {
5763                         next;
5764                 }
5765                 $git_dir = "$projectroot/$proj{'path'}";
5766                 my %co = parse_commit($head);
5767                 if (!%co) {
5768                         next;
5769                 }
5770
5771                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5772                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5773                 my $html = "$my_url?p=$proj{'path'};a=summary";
5774                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5775         }
5776         print <<XML;
5777 </outline>
5778 </body>
5779 </opml>
5780 XML
5781 }