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         $path_info =~ s,^\Q$project\E/*,,;
 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                 $href .= "/".esc_url($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'} = $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'} = [ split('', $4) ];
2184                 $res{'to_file'} = unquote($5);
2185         }
2186         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2187         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2188                 $res{'commit'} = $1;
2189         }
2190
2191         return wantarray ? %res : \%res;
2192 }
2193
2194 # wrapper: return parsed line of git-diff-tree "raw" output
2195 # (the argument might be raw line, or parsed info)
2196 sub parsed_difftree_line {
2197         my $line_or_ref = shift;
2198
2199         if (ref($line_or_ref) eq "HASH") {
2200                 # pre-parsed (or generated by hand)
2201                 return $line_or_ref;
2202         } else {
2203                 return parse_difftree_raw_line($line_or_ref);
2204         }
2205 }
2206
2207 # parse line of git-ls-tree output
2208 sub parse_ls_tree_line ($;%) {
2209         my $line = shift;
2210         my %opts = @_;
2211         my %res;
2212
2213         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2214         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2215
2216         $res{'mode'} = $1;
2217         $res{'type'} = $2;
2218         $res{'hash'} = $3;
2219         if ($opts{'-z'}) {
2220                 $res{'name'} = $4;
2221         } else {
2222                 $res{'name'} = unquote($4);
2223         }
2224
2225         return wantarray ? %res : \%res;
2226 }
2227
2228 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2229 sub parse_from_to_diffinfo {
2230         my ($diffinfo, $from, $to, @parents) = @_;
2231
2232         if ($diffinfo->{'nparents'}) {
2233                 # combined diff
2234                 $from->{'file'} = [];
2235                 $from->{'href'} = [];
2236                 fill_from_file_info($diffinfo, @parents)
2237                         unless exists $diffinfo->{'from_file'};
2238                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2239                         $from->{'file'}[$i] =
2240                                 defined $diffinfo->{'from_file'}[$i] ?
2241                                         $diffinfo->{'from_file'}[$i] :
2242                                         $diffinfo->{'to_file'};
2243                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2244                                 $from->{'href'}[$i] = href(action=>"blob",
2245                                                            hash_base=>$parents[$i],
2246                                                            hash=>$diffinfo->{'from_id'}[$i],
2247                                                            file_name=>$from->{'file'}[$i]);
2248                         } else {
2249                                 $from->{'href'}[$i] = undef;
2250                         }
2251                 }
2252         } else {
2253                 # ordinary (not combined) diff
2254                 $from->{'file'} = $diffinfo->{'from_file'};
2255                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2256                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2257                                                hash=>$diffinfo->{'from_id'},
2258                                                file_name=>$from->{'file'});
2259                 } else {
2260                         delete $from->{'href'};
2261                 }
2262         }
2263
2264         $to->{'file'} = $diffinfo->{'to_file'};
2265         if (!is_deleted($diffinfo)) { # file exists in result
2266                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2267                                      hash=>$diffinfo->{'to_id'},
2268                                      file_name=>$to->{'file'});
2269         } else {
2270                 delete $to->{'href'};
2271         }
2272 }
2273
2274 ## ......................................................................
2275 ## parse to array of hashes functions
2276
2277 sub git_get_heads_list {
2278         my $limit = shift;
2279         my @headslist;
2280
2281         open my $fd, '-|', git_cmd(), 'for-each-ref',
2282                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2283                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2284                 'refs/heads'
2285                 or return;
2286         while (my $line = <$fd>) {
2287                 my %ref_item;
2288
2289                 chomp $line;
2290                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2291                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2292                 my ($committer, $epoch, $tz) =
2293                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2294                 $ref_item{'fullname'}  = $name;
2295                 $name =~ s!^refs/heads/!!;
2296
2297                 $ref_item{'name'}  = $name;
2298                 $ref_item{'id'}    = $hash;
2299                 $ref_item{'title'} = $title || '(no commit message)';
2300                 $ref_item{'epoch'} = $epoch;
2301                 if ($epoch) {
2302                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2303                 } else {
2304                         $ref_item{'age'} = "unknown";
2305                 }
2306
2307                 push @headslist, \%ref_item;
2308         }
2309         close $fd;
2310
2311         return wantarray ? @headslist : \@headslist;
2312 }
2313
2314 sub git_get_tags_list {
2315         my $limit = shift;
2316         my @tagslist;
2317
2318         open my $fd, '-|', git_cmd(), 'for-each-ref',
2319                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2320                 '--format=%(objectname) %(objecttype) %(refname) '.
2321                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2322                 'refs/tags'
2323                 or return;
2324         while (my $line = <$fd>) {
2325                 my %ref_item;
2326
2327                 chomp $line;
2328                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2329                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2330                 my ($creator, $epoch, $tz) =
2331                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2332                 $ref_item{'fullname'} = $name;
2333                 $name =~ s!^refs/tags/!!;
2334
2335                 $ref_item{'type'} = $type;
2336                 $ref_item{'id'} = $id;
2337                 $ref_item{'name'} = $name;
2338                 if ($type eq "tag") {
2339                         $ref_item{'subject'} = $title;
2340                         $ref_item{'reftype'} = $reftype;
2341                         $ref_item{'refid'}   = $refid;
2342                 } else {
2343                         $ref_item{'reftype'} = $type;
2344                         $ref_item{'refid'}   = $id;
2345                 }
2346
2347                 if ($type eq "tag" || $type eq "commit") {
2348                         $ref_item{'epoch'} = $epoch;
2349                         if ($epoch) {
2350                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2351                         } else {
2352                                 $ref_item{'age'} = "unknown";
2353                         }
2354                 }
2355
2356                 push @tagslist, \%ref_item;
2357         }
2358         close $fd;
2359
2360         return wantarray ? @tagslist : \@tagslist;
2361 }
2362
2363 ## ----------------------------------------------------------------------
2364 ## filesystem-related functions
2365
2366 sub get_file_owner {
2367         my $path = shift;
2368
2369         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2370         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2371         if (!defined $gcos) {
2372                 return undef;
2373         }
2374         my $owner = $gcos;
2375         $owner =~ s/[,;].*$//;
2376         return to_utf8($owner);
2377 }
2378
2379 ## ......................................................................
2380 ## mimetype related functions
2381
2382 sub mimetype_guess_file {
2383         my $filename = shift;
2384         my $mimemap = shift;
2385         -r $mimemap or return undef;
2386
2387         my %mimemap;
2388         open(MIME, $mimemap) or return undef;
2389         while (<MIME>) {
2390                 next if m/^#/; # skip comments
2391                 my ($mime, $exts) = split(/\t+/);
2392                 if (defined $exts) {
2393                         my @exts = split(/\s+/, $exts);
2394                         foreach my $ext (@exts) {
2395                                 $mimemap{$ext} = $mime;
2396                         }
2397                 }
2398         }
2399         close(MIME);
2400
2401         $filename =~ /\.([^.]*)$/;
2402         return $mimemap{$1};
2403 }
2404
2405 sub mimetype_guess {
2406         my $filename = shift;
2407         my $mime;
2408         $filename =~ /\./ or return undef;
2409
2410         if ($mimetypes_file) {
2411                 my $file = $mimetypes_file;
2412                 if ($file !~ m!^/!) { # if it is relative path
2413                         # it is relative to project
2414                         $file = "$projectroot/$project/$file";
2415                 }
2416                 $mime = mimetype_guess_file($filename, $file);
2417         }
2418         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2419         return $mime;
2420 }
2421
2422 sub blob_mimetype {
2423         my $fd = shift;
2424         my $filename = shift;
2425
2426         if ($filename) {
2427                 my $mime = mimetype_guess($filename);
2428                 $mime and return $mime;
2429         }
2430
2431         # just in case
2432         return $default_blob_plain_mimetype unless $fd;
2433
2434         if (-T $fd) {
2435                 return 'text/plain' .
2436                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2437         } elsif (! $filename) {
2438                 return 'application/octet-stream';
2439         } elsif ($filename =~ m/\.png$/i) {
2440                 return 'image/png';
2441         } elsif ($filename =~ m/\.gif$/i) {
2442                 return 'image/gif';
2443         } elsif ($filename =~ m/\.jpe?g$/i) {
2444                 return 'image/jpeg';
2445         } else {
2446                 return 'application/octet-stream';
2447         }
2448 }
2449
2450 ## ======================================================================
2451 ## functions printing HTML: header, footer, error page
2452
2453 sub git_header_html {
2454         my $status = shift || "200 OK";
2455         my $expires = shift;
2456
2457         my $title = "$site_name";
2458         if (defined $project) {
2459                 $title .= " - " . to_utf8($project);
2460                 if (defined $action) {
2461                         $title .= "/$action";
2462                         if (defined $file_name) {
2463                                 $title .= " - " . esc_path($file_name);
2464                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2465                                         $title .= "/";
2466                                 }
2467                         }
2468                 }
2469         }
2470         my $content_type;
2471         # require explicit support from the UA if we are to send the page as
2472         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2473         # we have to do this because MSIE sometimes globs '*/*', pretending to
2474         # support xhtml+xml but choking when it gets what it asked for.
2475         if (defined $cgi->http('HTTP_ACCEPT') &&
2476             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2477             $cgi->Accept('application/xhtml+xml') != 0) {
2478                 $content_type = 'application/xhtml+xml';
2479         } else {
2480                 $content_type = 'text/html';
2481         }
2482         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2483                            -status=> $status, -expires => $expires);
2484         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2485         print <<EOF;
2486 <?xml version="1.0" encoding="utf-8"?>
2487 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2488 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2489 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2490 <!-- git core binaries version $git_version -->
2491 <head>
2492 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2493 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2494 <meta name="robots" content="index, nofollow"/>
2495 <title>$title</title>
2496 EOF
2497 # print out each stylesheet that exist
2498         if (defined $stylesheet) {
2499 #provides backwards capability for those people who define style sheet in a config file
2500                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2501         } else {
2502                 foreach my $stylesheet (@stylesheets) {
2503                         next unless $stylesheet;
2504                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2505                 }
2506         }
2507         if (defined $project) {
2508                 printf('<link rel="alternate" title="%s log RSS feed" '.
2509                        'href="%s" type="application/rss+xml" />'."\n",
2510                        esc_param($project), href(action=>"rss"));
2511                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2512                        'href="%s" type="application/rss+xml" />'."\n",
2513                        esc_param($project), href(action=>"rss",
2514                                                  extra_options=>"--no-merges"));
2515                 printf('<link rel="alternate" title="%s log Atom feed" '.
2516                        'href="%s" type="application/atom+xml" />'."\n",
2517                        esc_param($project), href(action=>"atom"));
2518                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2519                        'href="%s" type="application/atom+xml" />'."\n",
2520                        esc_param($project), href(action=>"atom",
2521                                                  extra_options=>"--no-merges"));
2522         } else {
2523                 printf('<link rel="alternate" title="%s projects list" '.
2524                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2525                        $site_name, href(project=>undef, action=>"project_index"));
2526                 printf('<link rel="alternate" title="%s projects feeds" '.
2527                        'href="%s" type="text/x-opml"/>'."\n",
2528                        $site_name, href(project=>undef, action=>"opml"));
2529         }
2530         if (defined $favicon) {
2531                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2532         }
2533
2534         print "</head>\n" .
2535               "<body>\n";
2536
2537         if (-f $site_header) {
2538                 open (my $fd, $site_header);
2539                 print <$fd>;
2540                 close $fd;
2541         }
2542
2543         print "<div class=\"page_header\">\n" .
2544               $cgi->a({-href => esc_url($logo_url),
2545                        -title => $logo_label},
2546                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2547         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2548         if (defined $project) {
2549                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2550                 if (defined $action) {
2551                         print " / $action";
2552                 }
2553                 print "\n";
2554         }
2555         print "</div>\n";
2556
2557         my ($have_search) = gitweb_check_feature('search');
2558         if ((defined $project) && ($have_search)) {
2559                 if (!defined $searchtext) {
2560                         $searchtext = "";
2561                 }
2562                 my $search_hash;
2563                 if (defined $hash_base) {
2564                         $search_hash = $hash_base;
2565                 } elsif (defined $hash) {
2566                         $search_hash = $hash;
2567                 } else {
2568                         $search_hash = "HEAD";
2569                 }
2570                 my $action = $my_uri;
2571                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2572                 if ($use_pathinfo) {
2573                         $action .= "/".esc_url($project);
2574                 } else {
2575                         $cgi->param("p", $project);
2576                 }
2577                 $cgi->param("a", "search");
2578                 $cgi->param("h", $search_hash);
2579                 print $cgi->startform(-method => "get", -action => $action) .
2580                       "<div class=\"search\">\n" .
2581                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2582                       $cgi->hidden(-name => "a") . "\n" .
2583                       $cgi->hidden(-name => "h") . "\n" .
2584                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2585                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2586                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2587                       " search:\n",
2588                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2589                       "<span title=\"Extended regular expression\">" .
2590                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2591                                      -checked => $search_use_regexp) .
2592                       "</span>" .
2593                       "</div>" .
2594                       $cgi->end_form() . "\n";
2595         }
2596 }
2597
2598 sub git_footer_html {
2599         print "<div class=\"page_footer\">\n";
2600         if (defined $project) {
2601                 my $descr = git_get_project_description($project);
2602                 if (defined $descr) {
2603                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2604                 }
2605                 print $cgi->a({-href => href(action=>"rss"),
2606                               -class => "rss_logo"}, "RSS") . " ";
2607                 print $cgi->a({-href => href(action=>"atom"),
2608                               -class => "rss_logo"}, "Atom") . "\n";
2609         } else {
2610                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2611                               -class => "rss_logo"}, "OPML") . " ";
2612                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2613                               -class => "rss_logo"}, "TXT") . "\n";
2614         }
2615         print "</div>\n" ;
2616
2617         if (-f $site_footer) {
2618                 open (my $fd, $site_footer);
2619                 print <$fd>;
2620                 close $fd;
2621         }
2622
2623         print "</body>\n" .
2624               "</html>";
2625 }
2626
2627 sub die_error {
2628         my $status = shift || "403 Forbidden";
2629         my $error = shift || "Malformed query, file missing or permission denied";
2630
2631         git_header_html($status);
2632         print <<EOF;
2633 <div class="page_body">
2634 <br /><br />
2635 $status - $error
2636 <br />
2637 </div>
2638 EOF
2639         git_footer_html();
2640         exit;
2641 }
2642
2643 ## ----------------------------------------------------------------------
2644 ## functions printing or outputting HTML: navigation
2645
2646 sub git_print_page_nav {
2647         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2648         $extra = '' if !defined $extra; # pager or formats
2649
2650         my @navs = qw(summary shortlog log commit commitdiff tree);
2651         if ($suppress) {
2652                 @navs = grep { $_ ne $suppress } @navs;
2653         }
2654
2655         my %arg = map { $_ => {action=>$_} } @navs;
2656         if (defined $head) {
2657                 for (qw(commit commitdiff)) {
2658                         $arg{$_}{'hash'} = $head;
2659                 }
2660                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2661                         for (qw(shortlog log)) {
2662                                 $arg{$_}{'hash'} = $head;
2663                         }
2664                 }
2665         }
2666         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2667         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2668
2669         print "<div class=\"page_nav\">\n" .
2670                 (join " | ",
2671                  map { $_ eq $current ?
2672                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2673                  } @navs);
2674         print "<br/>\n$extra<br/>\n" .
2675               "</div>\n";
2676 }
2677
2678 sub format_paging_nav {
2679         my ($action, $hash, $head, $page, $has_next_link) = @_;
2680         my $paging_nav;
2681
2682
2683         if ($hash ne $head || $page) {
2684                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2685         } else {
2686                 $paging_nav .= "HEAD";
2687         }
2688
2689         if ($page > 0) {
2690                 $paging_nav .= " &sdot; " .
2691                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2692                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2693         } else {
2694                 $paging_nav .= " &sdot; prev";
2695         }
2696
2697         if ($has_next_link) {
2698                 $paging_nav .= " &sdot; " .
2699                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2700                                  -accesskey => "n", -title => "Alt-n"}, "next");
2701         } else {
2702                 $paging_nav .= " &sdot; next";
2703         }
2704
2705         return $paging_nav;
2706 }
2707
2708 ## ......................................................................
2709 ## functions printing or outputting HTML: div
2710
2711 sub git_print_header_div {
2712         my ($action, $title, $hash, $hash_base) = @_;
2713         my %args = ();
2714
2715         $args{'action'} = $action;
2716         $args{'hash'} = $hash if $hash;
2717         $args{'hash_base'} = $hash_base if $hash_base;
2718
2719         print "<div class=\"header\">\n" .
2720               $cgi->a({-href => href(%args), -class => "title"},
2721               $title ? $title : $action) .
2722               "\n</div>\n";
2723 }
2724
2725 #sub git_print_authorship (\%) {
2726 sub git_print_authorship {
2727         my $co = shift;
2728
2729         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2730         print "<div class=\"author_date\">" .
2731               esc_html($co->{'author_name'}) .
2732               " [$ad{'rfc2822'}";
2733         if ($ad{'hour_local'} < 6) {
2734                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2735                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2736         } else {
2737                 printf(" (%02d:%02d %s)",
2738                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2739         }
2740         print "]</div>\n";
2741 }
2742
2743 sub git_print_page_path {
2744         my $name = shift;
2745         my $type = shift;
2746         my $hb = shift;
2747
2748
2749         print "<div class=\"page_path\">";
2750         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2751                       -title => 'tree root'}, to_utf8("[$project]"));
2752         print " / ";
2753         if (defined $name) {
2754                 my @dirname = split '/', $name;
2755                 my $basename = pop @dirname;
2756                 my $fullname = '';
2757
2758                 foreach my $dir (@dirname) {
2759                         $fullname .= ($fullname ? '/' : '') . $dir;
2760                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2761                                                      hash_base=>$hb),
2762                                       -title => $fullname}, esc_path($dir));
2763                         print " / ";
2764                 }
2765                 if (defined $type && $type eq 'blob') {
2766                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2767                                                      hash_base=>$hb),
2768                                       -title => $name}, esc_path($basename));
2769                 } elsif (defined $type && $type eq 'tree') {
2770                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2771                                                      hash_base=>$hb),
2772                                       -title => $name}, esc_path($basename));
2773                         print " / ";
2774                 } else {
2775                         print esc_path($basename);
2776                 }
2777         }
2778         print "<br/></div>\n";
2779 }
2780
2781 # sub git_print_log (\@;%) {
2782 sub git_print_log ($;%) {
2783         my $log = shift;
2784         my %opts = @_;
2785
2786         if ($opts{'-remove_title'}) {
2787                 # remove title, i.e. first line of log
2788                 shift @$log;
2789         }
2790         # remove leading empty lines
2791         while (defined $log->[0] && $log->[0] eq "") {
2792                 shift @$log;
2793         }
2794
2795         # print log
2796         my $signoff = 0;
2797         my $empty = 0;
2798         foreach my $line (@$log) {
2799                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2800                         $signoff = 1;
2801                         $empty = 0;
2802                         if (! $opts{'-remove_signoff'}) {
2803                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2804                                 next;
2805                         } else {
2806                                 # remove signoff lines
2807                                 next;
2808                         }
2809                 } else {
2810                         $signoff = 0;
2811                 }
2812
2813                 # print only one empty line
2814                 # do not print empty line after signoff
2815                 if ($line eq "") {
2816                         next if ($empty || $signoff);
2817                         $empty = 1;
2818                 } else {
2819                         $empty = 0;
2820                 }
2821
2822                 print format_log_line_html($line) . "<br/>\n";
2823         }
2824
2825         if ($opts{'-final_empty_line'}) {
2826                 # end with single empty line
2827                 print "<br/>\n" unless $empty;
2828         }
2829 }
2830
2831 # return link target (what link points to)
2832 sub git_get_link_target {
2833         my $hash = shift;
2834         my $link_target;
2835
2836         # read link
2837         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2838                 or return;
2839         {
2840                 local $/;
2841                 $link_target = <$fd>;
2842         }
2843         close $fd
2844                 or return;
2845
2846         return $link_target;
2847 }
2848
2849 # given link target, and the directory (basedir) the link is in,
2850 # return target of link relative to top directory (top tree);
2851 # return undef if it is not possible (including absolute links).
2852 sub normalize_link_target {
2853         my ($link_target, $basedir, $hash_base) = @_;
2854
2855         # we can normalize symlink target only if $hash_base is provided
2856         return unless $hash_base;
2857
2858         # absolute symlinks (beginning with '/') cannot be normalized
2859         return if (substr($link_target, 0, 1) eq '/');
2860
2861         # normalize link target to path from top (root) tree (dir)
2862         my $path;
2863         if ($basedir) {
2864                 $path = $basedir . '/' . $link_target;
2865         } else {
2866                 # we are in top (root) tree (dir)
2867                 $path = $link_target;
2868         }
2869
2870         # remove //, /./, and /../
2871         my @path_parts;
2872         foreach my $part (split('/', $path)) {
2873                 # discard '.' and ''
2874                 next if (!$part || $part eq '.');
2875                 # handle '..'
2876                 if ($part eq '..') {
2877                         if (@path_parts) {
2878                                 pop @path_parts;
2879                         } else {
2880                                 # link leads outside repository (outside top dir)
2881                                 return;
2882                         }
2883                 } else {
2884                         push @path_parts, $part;
2885                 }
2886         }
2887         $path = join('/', @path_parts);
2888
2889         return $path;
2890 }
2891
2892 # print tree entry (row of git_tree), but without encompassing <tr> element
2893 sub git_print_tree_entry {
2894         my ($t, $basedir, $hash_base, $have_blame) = @_;
2895
2896         my %base_key = ();
2897         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2898
2899         # The format of a table row is: mode list link.  Where mode is
2900         # the mode of the entry, list is the name of the entry, an href,
2901         # and link is the action links of the entry.
2902
2903         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2904         if ($t->{'type'} eq "blob") {
2905                 print "<td class=\"list\">" .
2906                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2907                                                file_name=>"$basedir$t->{'name'}", %base_key),
2908                                 -class => "list"}, esc_path($t->{'name'}));
2909                 if (S_ISLNK(oct $t->{'mode'})) {
2910                         my $link_target = git_get_link_target($t->{'hash'});
2911                         if ($link_target) {
2912                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2913                                 if (defined $norm_target) {
2914                                         print " -> " .
2915                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2916                                                                      file_name=>$norm_target),
2917                                                        -title => $norm_target}, esc_path($link_target));
2918                                 } else {
2919                                         print " -> " . esc_path($link_target);
2920                                 }
2921                         }
2922                 }
2923                 print "</td>\n";
2924                 print "<td class=\"link\">";
2925                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2926                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2927                               "blob");
2928                 if ($have_blame) {
2929                         print " | " .
2930                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2931                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2932                                       "blame");
2933                 }
2934                 if (defined $hash_base) {
2935                         print " | " .
2936                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2937                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2938                                       "history");
2939                 }
2940                 print " | " .
2941                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2942                                                file_name=>"$basedir$t->{'name'}")},
2943                                 "raw");
2944                 print "</td>\n";
2945
2946         } elsif ($t->{'type'} eq "tree") {
2947                 print "<td class=\"list\">";
2948                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2949                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2950                               esc_path($t->{'name'}));
2951                 print "</td>\n";
2952                 print "<td class=\"link\">";
2953                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2954                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2955                               "tree");
2956                 if (defined $hash_base) {
2957                         print " | " .
2958                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2959                                                      file_name=>"$basedir$t->{'name'}")},
2960                                       "history");
2961                 }
2962                 print "</td>\n";
2963         } else {
2964                 # unknown object: we can only present history for it
2965                 # (this includes 'commit' object, i.e. submodule support)
2966                 print "<td class=\"list\">" .
2967                       esc_path($t->{'name'}) .
2968                       "</td>\n";
2969                 print "<td class=\"link\">";
2970                 if (defined $hash_base) {
2971                         print $cgi->a({-href => href(action=>"history",
2972                                                      hash_base=>$hash_base,
2973                                                      file_name=>"$basedir$t->{'name'}")},
2974                                       "history");
2975                 }
2976                 print "</td>\n";
2977         }
2978 }
2979
2980 ## ......................................................................
2981 ## functions printing large fragments of HTML
2982
2983 # get pre-image filenames for merge (combined) diff
2984 sub fill_from_file_info {
2985         my ($diff, @parents) = @_;
2986
2987         $diff->{'from_file'} = [ ];
2988         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2989         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2990                 if ($diff->{'status'}[$i] eq 'R' ||
2991                     $diff->{'status'}[$i] eq 'C') {
2992                         $diff->{'from_file'}[$i] =
2993                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2994                 }
2995         }
2996
2997         return $diff;
2998 }
2999
3000 # is current raw difftree line of file deletion
3001 sub is_deleted {
3002         my $diffinfo = shift;
3003
3004         return $diffinfo->{'to_id'} eq ('0' x 40);
3005 }
3006
3007 # does patch correspond to [previous] difftree raw line
3008 # $diffinfo  - hashref of parsed raw diff format
3009 # $patchinfo - hashref of parsed patch diff format
3010 #              (the same keys as in $diffinfo)
3011 sub is_patch_split {
3012         my ($diffinfo, $patchinfo) = @_;
3013
3014         return defined $diffinfo && defined $patchinfo
3015                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3016 }
3017
3018
3019 sub git_difftree_body {
3020         my ($difftree, $hash, @parents) = @_;
3021         my ($parent) = $parents[0];
3022         my ($have_blame) = gitweb_check_feature('blame');
3023         print "<div class=\"list_head\">\n";
3024         if ($#{$difftree} > 10) {
3025                 print(($#{$difftree} + 1) . " files changed:\n");
3026         }
3027         print "</div>\n";
3028
3029         print "<table class=\"" .
3030               (@parents > 1 ? "combined " : "") .
3031               "diff_tree\">\n";
3032
3033         # header only for combined diff in 'commitdiff' view
3034         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3035         if ($has_header) {
3036                 # table header
3037                 print "<thead><tr>\n" .
3038                        "<th></th><th></th>\n"; # filename, patchN link
3039                 for (my $i = 0; $i < @parents; $i++) {
3040                         my $par = $parents[$i];
3041                         print "<th>" .
3042                               $cgi->a({-href => href(action=>"commitdiff",
3043                                                      hash=>$hash, hash_parent=>$par),
3044                                        -title => 'commitdiff to parent number ' .
3045                                                   ($i+1) . ': ' . substr($par,0,7)},
3046                                       $i+1) .
3047                               "&nbsp;</th>\n";
3048                 }
3049                 print "</tr></thead>\n<tbody>\n";
3050         }
3051
3052         my $alternate = 1;
3053         my $patchno = 0;
3054         foreach my $line (@{$difftree}) {
3055                 my $diff = parsed_difftree_line($line);
3056
3057                 if ($alternate) {
3058                         print "<tr class=\"dark\">\n";
3059                 } else {
3060                         print "<tr class=\"light\">\n";
3061                 }
3062                 $alternate ^= 1;
3063
3064                 if (exists $diff->{'nparents'}) { # combined diff
3065
3066                         fill_from_file_info($diff, @parents)
3067                                 unless exists $diff->{'from_file'};
3068
3069                         if (!is_deleted($diff)) {
3070                                 # file exists in the result (child) commit
3071                                 print "<td>" .
3072                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3073                                                              file_name=>$diff->{'to_file'},
3074                                                              hash_base=>$hash),
3075                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3076                                       "</td>\n";
3077                         } else {
3078                                 print "<td>" .
3079                                       esc_path($diff->{'to_file'}) .
3080                                       "</td>\n";
3081                         }
3082
3083                         if ($action eq 'commitdiff') {
3084                                 # link to patch
3085                                 $patchno++;
3086                                 print "<td class=\"link\">" .
3087                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3088                                       " | " .
3089                                       "</td>\n";
3090                         }
3091
3092                         my $has_history = 0;
3093                         my $not_deleted = 0;
3094                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3095                                 my $hash_parent = $parents[$i];
3096                                 my $from_hash = $diff->{'from_id'}[$i];
3097                                 my $from_path = $diff->{'from_file'}[$i];
3098                                 my $status = $diff->{'status'}[$i];
3099
3100                                 $has_history ||= ($status ne 'A');
3101                                 $not_deleted ||= ($status ne 'D');
3102
3103                                 if ($status eq 'A') {
3104                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3105                                 } elsif ($status eq 'D') {
3106                                         print "<td class=\"link\">" .
3107                                               $cgi->a({-href => href(action=>"blob",
3108                                                                      hash_base=>$hash,
3109                                                                      hash=>$from_hash,
3110                                                                      file_name=>$from_path)},
3111                                                       "blob" . ($i+1)) .
3112                                               " | </td>\n";
3113                                 } else {
3114                                         if ($diff->{'to_id'} eq $from_hash) {
3115                                                 print "<td class=\"link nochange\">";
3116                                         } else {
3117                                                 print "<td class=\"link\">";
3118                                         }
3119                                         print $cgi->a({-href => href(action=>"blobdiff",
3120                                                                      hash=>$diff->{'to_id'},
3121                                                                      hash_parent=>$from_hash,
3122                                                                      hash_base=>$hash,
3123                                                                      hash_parent_base=>$hash_parent,
3124                                                                      file_name=>$diff->{'to_file'},
3125                                                                      file_parent=>$from_path)},
3126                                                       "diff" . ($i+1)) .
3127                                               " | </td>\n";
3128                                 }
3129                         }
3130
3131                         print "<td class=\"link\">";
3132                         if ($not_deleted) {
3133                                 print $cgi->a({-href => href(action=>"blob",
3134                                                              hash=>$diff->{'to_id'},
3135                                                              file_name=>$diff->{'to_file'},
3136                                                              hash_base=>$hash)},
3137                                               "blob");
3138                                 print " | " if ($has_history);
3139                         }
3140                         if ($has_history) {
3141                                 print $cgi->a({-href => href(action=>"history",
3142                                                              file_name=>$diff->{'to_file'},
3143                                                              hash_base=>$hash)},
3144                                               "history");
3145                         }
3146                         print "</td>\n";
3147
3148                         print "</tr>\n";
3149                         next; # instead of 'else' clause, to avoid extra indent
3150                 }
3151                 # else ordinary diff
3152
3153                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3154                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3155                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3156                         $to_mode_oct = oct $diff->{'to_mode'};
3157                         if (S_ISREG($to_mode_oct)) { # only for regular file
3158                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3159                         }
3160                         $to_file_type = file_type($diff->{'to_mode'});
3161                 }
3162                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3163                         $from_mode_oct = oct $diff->{'from_mode'};
3164                         if (S_ISREG($to_mode_oct)) { # only for regular file
3165                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3166                         }
3167                         $from_file_type = file_type($diff->{'from_mode'});
3168                 }
3169
3170                 if ($diff->{'status'} eq "A") { # created
3171                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3172                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3173                         $mode_chng   .= "]</span>";
3174                         print "<td>";
3175                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3176                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3177                                       -class => "list"}, esc_path($diff->{'file'}));
3178                         print "</td>\n";
3179                         print "<td>$mode_chng</td>\n";
3180                         print "<td class=\"link\">";
3181                         if ($action eq 'commitdiff') {
3182                                 # link to patch
3183                                 $patchno++;
3184                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3185                                 print " | ";
3186                         }
3187                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3188                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3189                                       "blob");
3190                         print "</td>\n";
3191
3192                 } elsif ($diff->{'status'} eq "D") { # deleted
3193                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3194                         print "<td>";
3195                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3196                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3197                                        -class => "list"}, esc_path($diff->{'file'}));
3198                         print "</td>\n";
3199                         print "<td>$mode_chng</td>\n";
3200                         print "<td class=\"link\">";
3201                         if ($action eq 'commitdiff') {
3202                                 # link to patch
3203                                 $patchno++;
3204                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3205                                 print " | ";
3206                         }
3207                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3208                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3209                                       "blob") . " | ";
3210                         if ($have_blame) {
3211                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3212                                                              file_name=>$diff->{'file'})},
3213                                               "blame") . " | ";
3214                         }
3215                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3216                                                      file_name=>$diff->{'file'})},
3217                                       "history");
3218                         print "</td>\n";
3219
3220                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3221                         my $mode_chnge = "";
3222                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3223                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3224                                 if ($from_file_type ne $to_file_type) {
3225                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3226                                 }
3227                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3228                                         if ($from_mode_str && $to_mode_str) {
3229                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3230                                         } elsif ($to_mode_str) {
3231                                                 $mode_chnge .= " mode: $to_mode_str";
3232                                         }
3233                                 }
3234                                 $mode_chnge .= "]</span>\n";
3235                         }
3236                         print "<td>";
3237                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3238                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3239                                       -class => "list"}, esc_path($diff->{'file'}));
3240                         print "</td>\n";
3241                         print "<td>$mode_chnge</td>\n";
3242                         print "<td class=\"link\">";
3243                         if ($action eq 'commitdiff') {
3244                                 # link to patch
3245                                 $patchno++;
3246                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3247                                       " | ";
3248                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3249                                 # "commit" view and modified file (not onlu mode changed)
3250                                 print $cgi->a({-href => href(action=>"blobdiff",
3251                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3252                                                              hash_base=>$hash, hash_parent_base=>$parent,
3253                                                              file_name=>$diff->{'file'})},
3254                                               "diff") .
3255                                       " | ";
3256                         }
3257                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3258                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3259                                        "blob") . " | ";
3260                         if ($have_blame) {
3261                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3262                                                              file_name=>$diff->{'file'})},
3263                                               "blame") . " | ";
3264                         }
3265                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3266                                                      file_name=>$diff->{'file'})},
3267                                       "history");
3268                         print "</td>\n";
3269
3270                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3271                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3272                         my $nstatus = $status_name{$diff->{'status'}};
3273                         my $mode_chng = "";
3274                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3275                                 # mode also for directories, so we cannot use $to_mode_str
3276                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3277                         }
3278                         print "<td>" .
3279                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3280                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3281                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3282                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3283                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3284                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3285                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3286                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3287                               "<td class=\"link\">";
3288                         if ($action eq 'commitdiff') {
3289                                 # link to patch
3290                                 $patchno++;
3291                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3292                                       " | ";
3293                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3294                                 # "commit" view and modified file (not only pure rename or copy)
3295                                 print $cgi->a({-href => href(action=>"blobdiff",
3296                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3297                                                              hash_base=>$hash, hash_parent_base=>$parent,
3298                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3299                                               "diff") .
3300                                       " | ";
3301                         }
3302                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3303                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3304                                       "blob") . " | ";
3305                         if ($have_blame) {
3306                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3307                                                              file_name=>$diff->{'to_file'})},
3308                                               "blame") . " | ";
3309                         }
3310                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3311                                                     file_name=>$diff->{'to_file'})},
3312                                       "history");
3313                         print "</td>\n";
3314
3315                 } # we should not encounter Unmerged (U) or Unknown (X) status
3316                 print "</tr>\n";
3317         }
3318         print "</tbody>" if $has_header;
3319         print "</table>\n";
3320 }
3321
3322 sub git_patchset_body {
3323         my ($fd, $difftree, $hash, @hash_parents) = @_;
3324         my ($hash_parent) = $hash_parents[0];
3325
3326         my $is_combined = (@hash_parents > 1);
3327         my $patch_idx = 0;
3328         my $patch_number = 0;
3329         my $patch_line;
3330         my $diffinfo;
3331         my $to_name;
3332         my (%from, %to);
3333
3334         print "<div class=\"patchset\">\n";
3335
3336         # skip to first patch
3337         while ($patch_line = <$fd>) {
3338                 chomp $patch_line;
3339
3340                 last if ($patch_line =~ m/^diff /);
3341         }
3342
3343  PATCH:
3344         while ($patch_line) {
3345
3346                 # parse "git diff" header line
3347                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3348                         # $1 is from_name, which we do not use
3349                         $to_name = unquote($2);
3350                         $to_name =~ s!^b/!!;
3351                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3352                         # $1 is 'cc' or 'combined', which we do not use
3353                         $to_name = unquote($2);
3354                 } else {
3355                         $to_name = undef;
3356                 }
3357
3358                 # check if current patch belong to current raw line
3359                 # and parse raw git-diff line if needed
3360                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3361                         # this is continuation of a split patch
3362                         print "<div class=\"patch cont\">\n";
3363                 } else {
3364                         # advance raw git-diff output if needed
3365                         $patch_idx++ if defined $diffinfo;
3366
3367                         # read and prepare patch information
3368                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3369
3370                         # compact combined diff output can have some patches skipped
3371                         # find which patch (using pathname of result) we are at now;
3372                         if ($is_combined) {
3373                                 while ($to_name ne $diffinfo->{'to_file'}) {
3374                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3375                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3376                                               "</div>\n";  # class="patch"
3377
3378                                         $patch_idx++;
3379                                         $patch_number++;
3380
3381                                         last if $patch_idx > $#$difftree;
3382                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3383                                 }
3384                         }
3385
3386                         # modifies %from, %to hashes
3387                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3388
3389                         # this is first patch for raw difftree line with $patch_idx index
3390                         # we index @$difftree array from 0, but number patches from 1
3391                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3392                 }
3393
3394                 # git diff header
3395                 #assert($patch_line =~ m/^diff /) if DEBUG;
3396                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3397                 $patch_number++;
3398                 # print "git diff" header
3399                 print format_git_diff_header_line($patch_line, $diffinfo,
3400                                                   \%from, \%to);
3401
3402                 # print extended diff header
3403                 print "<div class=\"diff extended_header\">\n";
3404         EXTENDED_HEADER:
3405                 while ($patch_line = <$fd>) {
3406                         chomp $patch_line;
3407
3408                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3409
3410                         print format_extended_diff_header_line($patch_line, $diffinfo,
3411                                                                \%from, \%to);
3412                 }
3413                 print "</div>\n"; # class="diff extended_header"
3414
3415                 # from-file/to-file diff header
3416                 if (! $patch_line) {
3417                         print "</div>\n"; # class="patch"
3418                         last PATCH;
3419                 }
3420                 next PATCH if ($patch_line =~ m/^diff /);
3421                 #assert($patch_line =~ m/^---/) if DEBUG;
3422
3423                 my $last_patch_line = $patch_line;
3424                 $patch_line = <$fd>;
3425                 chomp $patch_line;
3426                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3427
3428                 print format_diff_from_to_header($last_patch_line, $patch_line,
3429                                                  $diffinfo, \%from, \%to,
3430                                                  @hash_parents);
3431
3432                 # the patch itself
3433         LINE:
3434                 while ($patch_line = <$fd>) {
3435                         chomp $patch_line;
3436
3437                         next PATCH if ($patch_line =~ m/^diff /);
3438
3439                         print format_diff_line($patch_line, \%from, \%to);
3440                 }
3441
3442         } continue {
3443                 print "</div>\n"; # class="patch"
3444         }
3445
3446         # for compact combined (--cc) format, with chunk and patch simpliciaction
3447         # patchset might be empty, but there might be unprocessed raw lines
3448         for (++$patch_idx if $patch_number > 0;
3449              $patch_idx < @$difftree;
3450              ++$patch_idx) {
3451                 # read and prepare patch information
3452                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3453
3454                 # generate anchor for "patch" links in difftree / whatchanged part
3455                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3456                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3457                       "</div>\n";  # class="patch"
3458
3459                 $patch_number++;
3460         }
3461
3462         if ($patch_number == 0) {
3463                 if (@hash_parents > 1) {
3464                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3465                 } else {
3466                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3467                 }
3468         }
3469
3470         print "</div>\n"; # class="patchset"
3471 }
3472
3473 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3474
3475 sub git_project_list_body {
3476         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3477
3478         my ($check_forks) = gitweb_check_feature('forks');
3479
3480         my @projects;
3481         foreach my $pr (@$projlist) {
3482                 my (@aa) = git_get_last_activity($pr->{'path'});
3483                 unless (@aa) {
3484                         next;
3485                 }
3486                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3487                 if (!defined $pr->{'descr'}) {
3488                         my $descr = git_get_project_description($pr->{'path'}) || "";
3489                         $pr->{'descr_long'} = to_utf8($descr);
3490                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3491                 }
3492                 if (!defined $pr->{'owner'}) {
3493                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3494                 }
3495                 if ($check_forks) {
3496                         my $pname = $pr->{'path'};
3497                         if (($pname =~ s/\.git$//) &&
3498                             ($pname !~ /\/$/) &&
3499                             (-d "$projectroot/$pname")) {
3500                                 $pr->{'forks'} = "-d $projectroot/$pname";
3501                         }
3502                         else {
3503                                 $pr->{'forks'} = 0;
3504                         }
3505                 }
3506                 push @projects, $pr;
3507         }
3508
3509         $order ||= $default_projects_order;
3510         $from = 0 unless defined $from;
3511         $to = $#projects if (!defined $to || $#projects < $to);
3512
3513         print "<table class=\"project_list\">\n";
3514         unless ($no_header) {
3515                 print "<tr>\n";
3516                 if ($check_forks) {
3517                         print "<th></th>\n";
3518                 }
3519                 if ($order eq "project") {
3520                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3521                         print "<th>Project</th>\n";
3522                 } else {
3523                         print "<th>" .
3524                               $cgi->a({-href => href(project=>undef, order=>'project'),
3525                                        -class => "header"}, "Project") .
3526                               "</th>\n";
3527                 }
3528                 if ($order eq "descr") {
3529                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3530                         print "<th>Description</th>\n";
3531                 } else {
3532                         print "<th>" .
3533                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3534                                        -class => "header"}, "Description") .
3535                               "</th>\n";
3536                 }
3537                 if ($order eq "owner") {
3538                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3539                         print "<th>Owner</th>\n";
3540                 } else {
3541                         print "<th>" .
3542                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3543                                        -class => "header"}, "Owner") .
3544                               "</th>\n";
3545                 }
3546                 if ($order eq "age") {
3547                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3548                         print "<th>Last Change</th>\n";
3549                 } else {
3550                         print "<th>" .
3551                               $cgi->a({-href => href(project=>undef, order=>'age'),
3552                                        -class => "header"}, "Last Change") .
3553                               "</th>\n";
3554                 }
3555                 print "<th></th>\n" .
3556                       "</tr>\n";
3557         }
3558         my $alternate = 1;
3559         for (my $i = $from; $i <= $to; $i++) {
3560                 my $pr = $projects[$i];
3561                 if ($alternate) {
3562                         print "<tr class=\"dark\">\n";
3563                 } else {
3564                         print "<tr class=\"light\">\n";
3565                 }
3566                 $alternate ^= 1;
3567                 if ($check_forks) {
3568                         print "<td>";
3569                         if ($pr->{'forks'}) {
3570                                 print "<!-- $pr->{'forks'} -->\n";
3571                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3572                         }
3573                         print "</td>\n";
3574                 }
3575                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3576                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3577                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3578                                         -class => "list", -title => $pr->{'descr_long'}},
3579                                         esc_html($pr->{'descr'})) . "</td>\n" .
3580                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3581                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3582                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3583                       "<td class=\"link\">" .
3584                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3585                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3586                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3587                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3588                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3589                       "</td>\n" .
3590                       "</tr>\n";
3591         }
3592         if (defined $extra) {
3593                 print "<tr>\n";
3594                 if ($check_forks) {
3595                         print "<td></td>\n";
3596                 }
3597                 print "<td colspan=\"5\">$extra</td>\n" .
3598                       "</tr>\n";
3599         }
3600         print "</table>\n";
3601 }
3602
3603 sub git_shortlog_body {
3604         # uses global variable $project
3605         my ($commitlist, $from, $to, $refs, $extra) = @_;
3606
3607         $from = 0 unless defined $from;
3608         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3609
3610         print "<table class=\"shortlog\">\n";
3611         my $alternate = 1;
3612         for (my $i = $from; $i <= $to; $i++) {
3613                 my %co = %{$commitlist->[$i]};
3614                 my $commit = $co{'id'};
3615                 my $ref = format_ref_marker($refs, $commit);
3616                 if ($alternate) {
3617                         print "<tr class=\"dark\">\n";
3618                 } else {
3619                         print "<tr class=\"light\">\n";
3620                 }
3621                 $alternate ^= 1;
3622                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3623                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3624                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3625                       "<td><i>" . $author . "</i></td>\n" .
3626                       "<td>";
3627                 print format_subject_html($co{'title'}, $co{'title_short'},
3628                                           href(action=>"commit", hash=>$commit), $ref);
3629                 print "</td>\n" .
3630                       "<td class=\"link\">" .
3631                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3632                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3633                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3634                 my $snapshot_links = format_snapshot_links($commit);
3635                 if (defined $snapshot_links) {
3636                         print " | " . $snapshot_links;
3637                 }
3638                 print "</td>\n" .
3639                       "</tr>\n";
3640         }
3641         if (defined $extra) {
3642                 print "<tr>\n" .
3643                       "<td colspan=\"4\">$extra</td>\n" .
3644                       "</tr>\n";
3645         }
3646         print "</table>\n";
3647 }
3648
3649 sub git_history_body {
3650         # Warning: assumes constant type (blob or tree) during history
3651         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3652
3653         $from = 0 unless defined $from;
3654         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3655
3656         print "<table class=\"history\">\n";
3657         my $alternate = 1;
3658         for (my $i = $from; $i <= $to; $i++) {
3659                 my %co = %{$commitlist->[$i]};
3660                 if (!%co) {
3661                         next;
3662                 }
3663                 my $commit = $co{'id'};
3664
3665                 my $ref = format_ref_marker($refs, $commit);
3666
3667                 if ($alternate) {
3668                         print "<tr class=\"dark\">\n";
3669                 } else {
3670                         print "<tr class=\"light\">\n";
3671                 }
3672                 $alternate ^= 1;
3673         # shortlog uses      chop_str($co{'author_name'}, 10)
3674                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3675                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3676                       "<td><i>" . $author . "</i></td>\n" .
3677                       "<td>";
3678                 # originally git_history used chop_str($co{'title'}, 50)
3679                 print format_subject_html($co{'title'}, $co{'title_short'},
3680                                           href(action=>"commit", hash=>$commit), $ref);
3681                 print "</td>\n" .
3682                       "<td class=\"link\">" .
3683                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3684                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3685
3686                 if ($ftype eq 'blob') {
3687                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3688                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3689                         if (defined $blob_current && defined $blob_parent &&
3690                                         $blob_current ne $blob_parent) {
3691                                 print " | " .
3692                                         $cgi->a({-href => href(action=>"blobdiff",
3693                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3694                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3695                                                                file_name=>$file_name)},
3696                                                 "diff to current");
3697                         }
3698                 }
3699                 print "</td>\n" .
3700                       "</tr>\n";
3701         }
3702         if (defined $extra) {
3703                 print "<tr>\n" .
3704                       "<td colspan=\"4\">$extra</td>\n" .
3705                       "</tr>\n";
3706         }
3707         print "</table>\n";
3708 }
3709
3710 sub git_tags_body {
3711         # uses global variable $project
3712         my ($taglist, $from, $to, $extra) = @_;
3713         $from = 0 unless defined $from;
3714         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3715
3716         print "<table class=\"tags\">\n";
3717         my $alternate = 1;
3718         for (my $i = $from; $i <= $to; $i++) {
3719                 my $entry = $taglist->[$i];
3720                 my %tag = %$entry;
3721                 my $comment = $tag{'subject'};
3722                 my $comment_short;
3723                 if (defined $comment) {
3724                         $comment_short = chop_str($comment, 30, 5);
3725                 }
3726                 if ($alternate) {
3727                         print "<tr class=\"dark\">\n";
3728                 } else {
3729                         print "<tr class=\"light\">\n";
3730                 }
3731                 $alternate ^= 1;
3732                 if (defined $tag{'age'}) {
3733                         print "<td><i>$tag{'age'}</i></td>\n";
3734                 } else {
3735                         print "<td></td>\n";
3736                 }
3737                 print "<td>" .
3738                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3739                                -class => "list name"}, esc_html($tag{'name'})) .
3740                       "</td>\n" .
3741                       "<td>";
3742                 if (defined $comment) {
3743                         print format_subject_html($comment, $comment_short,
3744                                                   href(action=>"tag", hash=>$tag{'id'}));
3745                 }
3746                 print "</td>\n" .
3747                       "<td class=\"selflink\">";
3748                 if ($tag{'type'} eq "tag") {
3749                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3750                 } else {
3751                         print "&nbsp;";
3752                 }
3753                 print "</td>\n" .
3754                       "<td class=\"link\">" . " | " .
3755                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3756                 if ($tag{'reftype'} eq "commit") {
3757                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3758                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3759                 } elsif ($tag{'reftype'} eq "blob") {
3760                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3761                 }
3762                 print "</td>\n" .
3763                       "</tr>";
3764         }
3765         if (defined $extra) {
3766                 print "<tr>\n" .
3767                       "<td colspan=\"5\">$extra</td>\n" .
3768                       "</tr>\n";
3769         }
3770         print "</table>\n";
3771 }
3772
3773 sub git_heads_body {
3774         # uses global variable $project
3775         my ($headlist, $head, $from, $to, $extra) = @_;
3776         $from = 0 unless defined $from;
3777         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3778
3779         print "<table class=\"heads\">\n";
3780         my $alternate = 1;
3781         for (my $i = $from; $i <= $to; $i++) {
3782                 my $entry = $headlist->[$i];
3783                 my %ref = %$entry;
3784                 my $curr = $ref{'id'} eq $head;
3785                 if ($alternate) {
3786                         print "<tr class=\"dark\">\n";
3787                 } else {
3788                         print "<tr class=\"light\">\n";
3789                 }
3790                 $alternate ^= 1;
3791                 print "<td><i>$ref{'age'}</i></td>\n" .
3792                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3793                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3794                                -class => "list name"},esc_html($ref{'name'})) .
3795                       "</td>\n" .
3796                       "<td class=\"link\">" .
3797                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3798                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3799                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3800                       "</td>\n" .
3801                       "</tr>";
3802         }
3803         if (defined $extra) {
3804                 print "<tr>\n" .
3805                       "<td colspan=\"3\">$extra</td>\n" .
3806                       "</tr>\n";
3807         }
3808         print "</table>\n";
3809 }
3810
3811 sub git_search_grep_body {
3812         my ($commitlist, $from, $to, $extra) = @_;
3813         $from = 0 unless defined $from;
3814         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3815
3816         print "<table class=\"commit_search\">\n";
3817         my $alternate = 1;
3818         for (my $i = $from; $i <= $to; $i++) {
3819                 my %co = %{$commitlist->[$i]};
3820                 if (!%co) {
3821                         next;
3822                 }
3823                 my $commit = $co{'id'};
3824                 if ($alternate) {
3825                         print "<tr class=\"dark\">\n";
3826                 } else {
3827                         print "<tr class=\"light\">\n";
3828                 }
3829                 $alternate ^= 1;
3830                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3831                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3832                       "<td><i>" . $author . "</i></td>\n" .
3833                       "<td>" .
3834                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3835                                -class => "list subject"},
3836                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3837                 my $comment = $co{'comment'};
3838                 foreach my $line (@$comment) {
3839                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3840                                 my ($lead, $match, $trail) = ($1, $2, $3);
3841                                 $match = chop_str($match, 70, 5, 'center');
3842                                 my $contextlen = int((80 - length($match))/2);
3843                                 $contextlen = 30 if ($contextlen > 30);
3844                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3845                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3846
3847                                 $lead  = esc_html($lead);
3848                                 $match = esc_html($match);
3849                                 $trail = esc_html($trail);
3850
3851                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3852                         }
3853                 }
3854                 print "</td>\n" .
3855                       "<td class=\"link\">" .
3856                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3857                       " | " .
3858                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3859                       " | " .
3860                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3861                 print "</td>\n" .
3862                       "</tr>\n";
3863         }
3864         if (defined $extra) {
3865                 print "<tr>\n" .
3866                       "<td colspan=\"3\">$extra</td>\n" .
3867                       "</tr>\n";
3868         }
3869         print "</table>\n";
3870 }
3871
3872 ## ======================================================================
3873 ## ======================================================================
3874 ## actions
3875
3876 sub git_project_list {
3877         my $order = $cgi->param('o');
3878         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3879                 die_error(undef, "Unknown order parameter");
3880         }
3881
3882         my @list = git_get_projects_list();
3883         if (!@list) {
3884                 die_error(undef, "No projects found");
3885         }
3886
3887         git_header_html();
3888         if (-f $home_text) {
3889                 print "<div class=\"index_include\">\n";
3890                 open (my $fd, $home_text);
3891                 print <$fd>;
3892                 close $fd;
3893                 print "</div>\n";
3894         }
3895         git_project_list_body(\@list, $order);
3896         git_footer_html();
3897 }
3898
3899 sub git_forks {
3900         my $order = $cgi->param('o');
3901         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3902                 die_error(undef, "Unknown order parameter");
3903         }
3904
3905         my @list = git_get_projects_list($project);
3906         if (!@list) {
3907                 die_error(undef, "No forks found");
3908         }
3909
3910         git_header_html();
3911         git_print_page_nav('','');
3912         git_print_header_div('summary', "$project forks");
3913         git_project_list_body(\@list, $order);
3914         git_footer_html();
3915 }
3916
3917 sub git_project_index {
3918         my @projects = git_get_projects_list($project);
3919
3920         print $cgi->header(
3921                 -type => 'text/plain',
3922                 -charset => 'utf-8',
3923                 -content_disposition => 'inline; filename="index.aux"');
3924
3925         foreach my $pr (@projects) {
3926                 if (!exists $pr->{'owner'}) {
3927                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3928                 }
3929
3930                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3931                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3932                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3933                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3934                 $path  =~ s/ /\+/g;
3935                 $owner =~ s/ /\+/g;
3936
3937                 print "$path $owner\n";
3938         }
3939 }
3940
3941 sub git_summary {
3942         my $descr = git_get_project_description($project) || "none";
3943         my %co = parse_commit("HEAD");
3944         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3945         my $head = $co{'id'};
3946
3947         my $owner = git_get_project_owner($project);
3948
3949         my $refs = git_get_references();
3950         # These get_*_list functions return one more to allow us to see if
3951         # there are more ...
3952         my @taglist  = git_get_tags_list(16);
3953         my @headlist = git_get_heads_list(16);
3954         my @forklist;
3955         my ($check_forks) = gitweb_check_feature('forks');
3956
3957         if ($check_forks) {
3958                 @forklist = git_get_projects_list($project);
3959         }
3960
3961         git_header_html();
3962         git_print_page_nav('summary','', $head);
3963
3964         print "<div class=\"title\">&nbsp;</div>\n";
3965         print "<table class=\"projects_list\">\n" .
3966               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3967               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3968         if (defined $cd{'rfc2822'}) {
3969                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3970         }
3971
3972         # use per project git URL list in $projectroot/$project/cloneurl
3973         # or make project git URL from git base URL and project name
3974         my $url_tag = "URL";
3975         my @url_list = git_get_project_url_list($project);
3976         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3977         foreach my $git_url (@url_list) {
3978                 next unless $git_url;
3979                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3980                 $url_tag = "";
3981         }
3982         print "</table>\n";
3983
3984         if (-s "$projectroot/$project/README.html") {
3985                 if (open my $fd, "$projectroot/$project/README.html") {
3986                         print "<div class=\"title\">readme</div>\n" .
3987                               "<div class=\"readme\">\n";
3988                         print $_ while (<$fd>);
3989                         print "\n</div>\n"; # class="readme"
3990                         close $fd;
3991                 }
3992         }
3993
3994         # we need to request one more than 16 (0..15) to check if
3995         # those 16 are all
3996         my @commitlist = $head ? parse_commits($head, 17) : ();
3997         if (@commitlist) {
3998                 git_print_header_div('shortlog');
3999                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4000                                   $#commitlist <=  15 ? undef :
4001                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4002         }
4003
4004         if (@taglist) {
4005                 git_print_header_div('tags');
4006                 git_tags_body(\@taglist, 0, 15,
4007                               $#taglist <=  15 ? undef :
4008                               $cgi->a({-href => href(action=>"tags")}, "..."));
4009         }
4010
4011         if (@headlist) {
4012                 git_print_header_div('heads');
4013                 git_heads_body(\@headlist, $head, 0, 15,
4014                                $#headlist <= 15 ? undef :
4015                                $cgi->a({-href => href(action=>"heads")}, "..."));
4016         }
4017
4018         if (@forklist) {
4019                 git_print_header_div('forks');
4020                 git_project_list_body(\@forklist, undef, 0, 15,
4021                                       $#forklist <= 15 ? undef :
4022                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4023                                       'noheader');
4024         }
4025
4026         git_footer_html();
4027 }
4028
4029 sub git_tag {
4030         my $head = git_get_head_hash($project);
4031         git_header_html();
4032         git_print_page_nav('','', $head,undef,$head);
4033         my %tag = parse_tag($hash);
4034
4035         if (! %tag) {
4036                 die_error(undef, "Unknown tag object");
4037         }
4038
4039         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4040         print "<div class=\"title_text\">\n" .
4041               "<table class=\"object_header\">\n" .
4042               "<tr>\n" .
4043               "<td>object</td>\n" .
4044               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4045                                $tag{'object'}) . "</td>\n" .
4046               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4047                                               $tag{'type'}) . "</td>\n" .
4048               "</tr>\n";
4049         if (defined($tag{'author'})) {
4050                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4051                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4052                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4053                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4054                         "</td></tr>\n";
4055         }
4056         print "</table>\n\n" .
4057               "</div>\n";
4058         print "<div class=\"page_body\">";
4059         my $comment = $tag{'comment'};
4060         foreach my $line (@$comment) {
4061                 chomp $line;
4062                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4063         }
4064         print "</div>\n";
4065         git_footer_html();
4066 }
4067
4068 sub git_blame2 {
4069         my $fd;
4070         my $ftype;
4071
4072         my ($have_blame) = gitweb_check_feature('blame');
4073         if (!$have_blame) {
4074                 die_error('403 Permission denied', "Permission denied");
4075         }
4076         die_error('404 Not Found', "File name not defined") if (!$file_name);
4077         $hash_base ||= git_get_head_hash($project);
4078         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4079         my %co = parse_commit($hash_base)
4080                 or die_error(undef, "Reading commit failed");
4081         if (!defined $hash) {
4082                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4083                         or die_error(undef, "Error looking up file");
4084         }
4085         $ftype = git_get_type($hash);
4086         if ($ftype !~ "blob") {
4087                 die_error('400 Bad Request', "Object is not a blob");
4088         }
4089         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4090               $file_name, $hash_base)
4091                 or die_error(undef, "Open git-blame failed");
4092         git_header_html();
4093         my $formats_nav =
4094                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4095                         "blob") .
4096                 " | " .
4097                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4098                         "history") .
4099                 " | " .
4100                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4101                         "HEAD");
4102         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4103         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4104         git_print_page_path($file_name, $ftype, $hash_base);
4105         my @rev_color = (qw(light2 dark2));
4106         my $num_colors = scalar(@rev_color);
4107         my $current_color = 0;
4108         my $last_rev;
4109         print <<HTML;
4110 <div class="page_body">
4111 <table class="blame">
4112 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4113 HTML
4114         my %metainfo = ();
4115         while (1) {
4116                 $_ = <$fd>;
4117                 last unless defined $_;
4118                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4119                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4120                 if (!exists $metainfo{$full_rev}) {
4121                         $metainfo{$full_rev} = {};
4122                 }
4123                 my $meta = $metainfo{$full_rev};
4124                 while (<$fd>) {
4125                         last if (s/^\t//);
4126                         if (/^(\S+) (.*)$/) {
4127                                 $meta->{$1} = $2;
4128                         }
4129                 }
4130                 my $data = $_;
4131                 chomp $data;
4132                 my $rev = substr($full_rev, 0, 8);
4133                 my $author = $meta->{'author'};
4134                 my %date = parse_date($meta->{'author-time'},
4135                                       $meta->{'author-tz'});
4136                 my $date = $date{'iso-tz'};
4137                 if ($group_size) {
4138                         $current_color = ++$current_color % $num_colors;
4139                 }
4140                 print "<tr class=\"$rev_color[$current_color]\">\n";
4141                 if ($group_size) {
4142                         print "<td class=\"sha1\"";
4143                         print " title=\"". esc_html($author) . ", $date\"";
4144                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4145                         print ">";
4146                         print $cgi->a({-href => href(action=>"commit",
4147                                                      hash=>$full_rev,
4148                                                      file_name=>$file_name)},
4149                                       esc_html($rev));
4150                         print "</td>\n";
4151                 }
4152                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4153                         or die_error(undef, "Open git-rev-parse failed");
4154                 my $parent_commit = <$dd>;
4155                 close $dd;
4156                 chomp($parent_commit);
4157                 my $blamed = href(action => 'blame',
4158                                   file_name => $meta->{'filename'},
4159                                   hash_base => $parent_commit);
4160                 print "<td class=\"linenr\">";
4161                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4162                                 -id => "l$lineno",
4163                                 -class => "linenr" },
4164                               esc_html($lineno));
4165                 print "</td>";
4166                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4167                 print "</tr>\n";
4168         }
4169         print "</table>\n";
4170         print "</div>";
4171         close $fd
4172                 or print "Reading blob failed\n";
4173         git_footer_html();
4174 }
4175
4176 sub git_blame {
4177         my $fd;
4178
4179         my ($have_blame) = gitweb_check_feature('blame');
4180         if (!$have_blame) {
4181                 die_error('403 Permission denied', "Permission denied");
4182         }
4183         die_error('404 Not Found', "File name not defined") if (!$file_name);
4184         $hash_base ||= git_get_head_hash($project);
4185         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4186         my %co = parse_commit($hash_base)
4187                 or die_error(undef, "Reading commit failed");
4188         if (!defined $hash) {
4189                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4190                         or die_error(undef, "Error lookup file");
4191         }
4192         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4193                 or die_error(undef, "Open git-annotate failed");
4194         git_header_html();
4195         my $formats_nav =
4196                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4197                         "blob") .
4198                 " | " .
4199                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4200                         "history") .
4201                 " | " .
4202                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4203                         "HEAD");
4204         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4205         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4206         git_print_page_path($file_name, 'blob', $hash_base);
4207         print "<div class=\"page_body\">\n";
4208         print <<HTML;
4209 <table class="blame">
4210   <tr>
4211     <th>Commit</th>
4212     <th>Age</th>
4213     <th>Author</th>
4214     <th>Line</th>
4215     <th>Data</th>
4216   </tr>
4217 HTML
4218         my @line_class = (qw(light dark));
4219         my $line_class_len = scalar (@line_class);
4220         my $line_class_num = $#line_class;
4221         while (my $line = <$fd>) {
4222                 my $long_rev;
4223                 my $short_rev;
4224                 my $author;
4225                 my $time;
4226                 my $lineno;
4227                 my $data;
4228                 my $age;
4229                 my $age_str;
4230                 my $age_class;
4231
4232                 chomp $line;
4233                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4234
4235                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4236                         $long_rev = $1;
4237                         $author   = $2;
4238                         $time     = $3;
4239                         $lineno   = $4;
4240                         $data     = $5;
4241                 } else {
4242                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4243                         next;
4244                 }
4245                 $short_rev  = substr ($long_rev, 0, 8);
4246                 $age        = time () - $time;
4247                 $age_str    = age_string ($age);
4248                 $age_str    =~ s/ /&nbsp;/g;
4249                 $age_class  = age_class($age);
4250                 $author     = esc_html ($author);
4251                 $author     =~ s/ /&nbsp;/g;
4252
4253                 $data = untabify($data);
4254                 $data = esc_html ($data);
4255
4256                 print <<HTML;
4257   <tr class="$line_class[$line_class_num]">
4258     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4259     <td class="$age_class">$age_str</td>
4260     <td>$author</td>
4261     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4262     <td class="pre">$data</td>
4263   </tr>
4264 HTML
4265         } # while (my $line = <$fd>)
4266         print "</table>\n\n";
4267         close $fd
4268                 or print "Reading blob failed.\n";
4269         print "</div>";
4270         git_footer_html();
4271 }
4272
4273 sub git_tags {
4274         my $head = git_get_head_hash($project);
4275         git_header_html();
4276         git_print_page_nav('','', $head,undef,$head);
4277         git_print_header_div('summary', $project);
4278
4279         my @tagslist = git_get_tags_list();
4280         if (@tagslist) {
4281                 git_tags_body(\@tagslist);
4282         }
4283         git_footer_html();
4284 }
4285
4286 sub git_heads {
4287         my $head = git_get_head_hash($project);
4288         git_header_html();
4289         git_print_page_nav('','', $head,undef,$head);
4290         git_print_header_div('summary', $project);
4291
4292         my @headslist = git_get_heads_list();
4293         if (@headslist) {
4294                 git_heads_body(\@headslist, $head);
4295         }
4296         git_footer_html();
4297 }
4298
4299 sub git_blob_plain {
4300         my $expires;
4301
4302         if (!defined $hash) {
4303                 if (defined $file_name) {
4304                         my $base = $hash_base || git_get_head_hash($project);
4305                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4306                                 or die_error(undef, "Error lookup file");
4307                 } else {
4308                         die_error(undef, "No file name defined");
4309                 }
4310         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4311                 # blobs defined by non-textual hash id's can be cached
4312                 $expires = "+1d";
4313         }
4314
4315         my $type = shift;
4316         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4317                 or die_error(undef, "Couldn't cat $file_name, $hash");
4318
4319         $type ||= blob_mimetype($fd, $file_name);
4320
4321         # save as filename, even when no $file_name is given
4322         my $save_as = "$hash";
4323         if (defined $file_name) {
4324                 $save_as = $file_name;
4325         } elsif ($type =~ m/^text\//) {
4326                 $save_as .= '.txt';
4327         }
4328
4329         print $cgi->header(
4330                 -type => "$type",
4331                 -expires=>$expires,
4332                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4333         undef $/;
4334         binmode STDOUT, ':raw';
4335         print <$fd>;
4336         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4337         $/ = "\n";
4338         close $fd;
4339 }
4340
4341 sub git_blob {
4342         my $expires;
4343
4344         if (!defined $hash) {
4345                 if (defined $file_name) {
4346                         my $base = $hash_base || git_get_head_hash($project);
4347                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4348                                 or die_error(undef, "Error lookup file");
4349                 } else {
4350                         die_error(undef, "No file name defined");
4351                 }
4352         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4353                 # blobs defined by non-textual hash id's can be cached
4354                 $expires = "+1d";
4355         }
4356
4357         my ($have_blame) = gitweb_check_feature('blame');
4358         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4359                 or die_error(undef, "Couldn't cat $file_name, $hash");
4360         my $mimetype = blob_mimetype($fd, $file_name);
4361         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4362                 close $fd;
4363                 return git_blob_plain($mimetype);
4364         }
4365         # we can have blame only for text/* mimetype
4366         $have_blame &&= ($mimetype =~ m!^text/!);
4367
4368         git_header_html(undef, $expires);
4369         my $formats_nav = '';
4370         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4371                 if (defined $file_name) {
4372                         if ($have_blame) {
4373                                 $formats_nav .=
4374                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4375                                                 "blame") .
4376                                         " | ";
4377                         }
4378                         $formats_nav .=
4379                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4380                                         "history") .
4381                                 " | " .
4382                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4383                                         "raw") .
4384                                 " | " .
4385                                 $cgi->a({-href => href(action=>"blob",
4386                                                        hash_base=>"HEAD", file_name=>$file_name)},
4387                                         "HEAD");
4388                 } else {
4389                         $formats_nav .=
4390                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4391                                         "raw");
4392                 }
4393                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4394                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4395         } else {
4396                 print "<div class=\"page_nav\">\n" .
4397                       "<br/><br/></div>\n" .
4398                       "<div class=\"title\">$hash</div>\n";
4399         }
4400         git_print_page_path($file_name, "blob", $hash_base);
4401         print "<div class=\"page_body\">\n";
4402         if ($mimetype =~ m!^image/!) {
4403                 print qq!<img type="$mimetype"!;
4404                 if ($file_name) {
4405                         print qq! alt="$file_name" title="$file_name"!;
4406                 }
4407                 print qq! src="! .
4408                       href(action=>"blob_plain", hash=>$hash,
4409                            hash_base=>$hash_base, file_name=>$file_name) .
4410                       qq!" />\n!;
4411         } else {
4412                 my $nr;
4413                 while (my $line = <$fd>) {
4414                         chomp $line;
4415                         $nr++;
4416                         $line = untabify($line);
4417                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4418                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4419                 }
4420         }
4421         close $fd
4422                 or print "Reading blob failed.\n";
4423         print "</div>";
4424         git_footer_html();
4425 }
4426
4427 sub git_tree {
4428         if (!defined $hash_base) {
4429                 $hash_base = "HEAD";
4430         }
4431         if (!defined $hash) {
4432                 if (defined $file_name) {
4433                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4434                 } else {
4435                         $hash = $hash_base;
4436                 }
4437         }
4438         $/ = "\0";
4439         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4440                 or die_error(undef, "Open git-ls-tree failed");
4441         my @entries = map { chomp; $_ } <$fd>;
4442         close $fd or die_error(undef, "Reading tree failed");
4443         $/ = "\n";
4444
4445         my $refs = git_get_references();
4446         my $ref = format_ref_marker($refs, $hash_base);
4447         git_header_html();
4448         my $basedir = '';
4449         my ($have_blame) = gitweb_check_feature('blame');
4450         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4451                 my @views_nav = ();
4452                 if (defined $file_name) {
4453                         push @views_nav,
4454                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4455                                         "history"),
4456                                 $cgi->a({-href => href(action=>"tree",
4457                                                        hash_base=>"HEAD", file_name=>$file_name)},
4458                                         "HEAD"),
4459                 }
4460                 my $snapshot_links = format_snapshot_links($hash);
4461                 if (defined $snapshot_links) {
4462                         # FIXME: Should be available when we have no hash base as well.
4463                         push @views_nav, $snapshot_links;
4464                 }
4465                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4466                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4467         } else {
4468                 undef $hash_base;
4469                 print "<div class=\"page_nav\">\n";
4470                 print "<br/><br/></div>\n";
4471                 print "<div class=\"title\">$hash</div>\n";
4472         }
4473         if (defined $file_name) {
4474                 $basedir = $file_name;
4475                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4476                         $basedir .= '/';
4477                 }
4478         }
4479         git_print_page_path($file_name, 'tree', $hash_base);
4480         print "<div class=\"page_body\">\n";
4481         print "<table class=\"tree\">\n";
4482         my $alternate = 1;
4483         # '..' (top directory) link if possible
4484         if (defined $hash_base &&
4485             defined $file_name && $file_name =~ m![^/]+$!) {
4486                 if ($alternate) {
4487                         print "<tr class=\"dark\">\n";
4488                 } else {
4489                         print "<tr class=\"light\">\n";
4490                 }
4491                 $alternate ^= 1;
4492
4493                 my $up = $file_name;
4494                 $up =~ s!/?[^/]+$!!;
4495                 undef $up unless $up;
4496                 # based on git_print_tree_entry
4497                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4498                 print '<td class="list">';
4499                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4500                                              file_name=>$up)},
4501                               "..");
4502                 print "</td>\n";
4503                 print "<td class=\"link\"></td>\n";
4504
4505                 print "</tr>\n";
4506         }
4507         foreach my $line (@entries) {
4508                 my %t = parse_ls_tree_line($line, -z => 1);
4509
4510                 if ($alternate) {
4511                         print "<tr class=\"dark\">\n";
4512                 } else {
4513                         print "<tr class=\"light\">\n";
4514                 }
4515                 $alternate ^= 1;
4516
4517                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4518
4519                 print "</tr>\n";
4520         }
4521         print "</table>\n" .
4522               "</div>";
4523         git_footer_html();
4524 }
4525
4526 sub git_snapshot {
4527         my @supported_fmts = gitweb_check_feature('snapshot');
4528         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4529
4530         my $format = $cgi->param('sf');
4531         if (!@supported_fmts) {
4532                 die_error('403 Permission denied', "Permission denied");
4533         }
4534         # default to first supported snapshot format
4535         $format ||= $supported_fmts[0];
4536         if ($format !~ m/^[a-z0-9]+$/) {
4537                 die_error(undef, "Invalid snapshot format parameter");
4538         } elsif (!exists($known_snapshot_formats{$format})) {
4539                 die_error(undef, "Unknown snapshot format");
4540         } elsif (!grep($_ eq $format, @supported_fmts)) {
4541                 die_error(undef, "Unsupported snapshot format");
4542         }
4543
4544         if (!defined $hash) {
4545                 $hash = git_get_head_hash($project);
4546         }
4547
4548         my $git_command = git_cmd_str();
4549         my $name = $project;
4550         $name =~ s,([^/])/*\.git$,$1,;
4551         $name = basename($name);
4552         my $filename = to_utf8($name);
4553         $name =~ s/\047/\047\\\047\047/g;
4554         my $cmd;
4555         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4556         $cmd = "$git_command archive " .
4557                 "--format=$known_snapshot_formats{$format}{'format'} " .
4558                 "--prefix=\'$name\'/ $hash";
4559         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4560                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4561         }
4562
4563         print $cgi->header(
4564                 -type => $known_snapshot_formats{$format}{'type'},
4565                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4566                 -status => '200 OK');
4567
4568         open my $fd, "-|", $cmd
4569                 or die_error(undef, "Execute git-archive failed");
4570         binmode STDOUT, ':raw';
4571         print <$fd>;
4572         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4573         close $fd;
4574 }
4575
4576 sub git_log {
4577         my $head = git_get_head_hash($project);
4578         if (!defined $hash) {
4579                 $hash = $head;
4580         }
4581         if (!defined $page) {
4582                 $page = 0;
4583         }
4584         my $refs = git_get_references();
4585
4586         my @commitlist = parse_commits($hash, 101, (100 * $page));
4587
4588         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4589
4590         git_header_html();
4591         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4592
4593         if (!@commitlist) {
4594                 my %co = parse_commit($hash);
4595
4596                 git_print_header_div('summary', $project);
4597                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4598         }
4599         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4600         for (my $i = 0; $i <= $to; $i++) {
4601                 my %co = %{$commitlist[$i]};
4602                 next if !%co;
4603                 my $commit = $co{'id'};
4604                 my $ref = format_ref_marker($refs, $commit);
4605                 my %ad = parse_date($co{'author_epoch'});
4606                 git_print_header_div('commit',
4607                                "<span class=\"age\">$co{'age_string'}</span>" .
4608                                esc_html($co{'title'}) . $ref,
4609                                $commit);
4610                 print "<div class=\"title_text\">\n" .
4611                       "<div class=\"log_link\">\n" .
4612                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4613                       " | " .
4614                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4615                       " | " .
4616                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4617                       "<br/>\n" .
4618                       "</div>\n" .
4619                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4620                       "</div>\n";
4621
4622                 print "<div class=\"log_body\">\n";
4623                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4624                 print "</div>\n";
4625         }
4626         if ($#commitlist >= 100) {
4627                 print "<div class=\"page_nav\">\n";
4628                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4629                                -accesskey => "n", -title => "Alt-n"}, "next");
4630                 print "</div>\n";
4631         }
4632         git_footer_html();
4633 }
4634
4635 sub git_commit {
4636         $hash ||= $hash_base || "HEAD";
4637         my %co = parse_commit($hash);
4638         if (!%co) {
4639                 die_error(undef, "Unknown commit object");
4640         }
4641         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4642         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4643
4644         my $parent  = $co{'parent'};
4645         my $parents = $co{'parents'}; # listref
4646
4647         # we need to prepare $formats_nav before any parameter munging
4648         my $formats_nav;
4649         if (!defined $parent) {
4650                 # --root commitdiff
4651                 $formats_nav .= '(initial)';
4652         } elsif (@$parents == 1) {
4653                 # single parent commit
4654                 $formats_nav .=
4655                         '(parent: ' .
4656                         $cgi->a({-href => href(action=>"commit",
4657                                                hash=>$parent)},
4658                                 esc_html(substr($parent, 0, 7))) .
4659                         ')';
4660         } else {
4661                 # merge commit
4662                 $formats_nav .=
4663                         '(merge: ' .
4664                         join(' ', map {
4665                                 $cgi->a({-href => href(action=>"commit",
4666                                                        hash=>$_)},
4667                                         esc_html(substr($_, 0, 7)));
4668                         } @$parents ) .
4669                         ')';
4670         }
4671
4672         if (!defined $parent) {
4673                 $parent = "--root";
4674         }
4675         my @difftree;
4676         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4677                 @diff_opts,
4678                 (@$parents <= 1 ? $parent : '-c'),
4679                 $hash, "--"
4680                 or die_error(undef, "Open git-diff-tree failed");
4681         @difftree = map { chomp; $_ } <$fd>;
4682         close $fd or die_error(undef, "Reading git-diff-tree failed");
4683
4684         # non-textual hash id's can be cached
4685         my $expires;
4686         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4687                 $expires = "+1d";
4688         }
4689         my $refs = git_get_references();
4690         my $ref = format_ref_marker($refs, $co{'id'});
4691
4692         git_header_html(undef, $expires);
4693         git_print_page_nav('commit', '',
4694                            $hash, $co{'tree'}, $hash,
4695                            $formats_nav);
4696
4697         if (defined $co{'parent'}) {
4698                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4699         } else {
4700                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4701         }
4702         print "<div class=\"title_text\">\n" .
4703               "<table class=\"object_header\">\n";
4704         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4705               "<tr>" .
4706               "<td></td><td> $ad{'rfc2822'}";
4707         if ($ad{'hour_local'} < 6) {
4708                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4709                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4710         } else {
4711                 printf(" (%02d:%02d %s)",
4712                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4713         }
4714         print "</td>" .
4715               "</tr>\n";
4716         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4717         print "<tr><td></td><td> $cd{'rfc2822'}" .
4718               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4719               "</td></tr>\n";
4720         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4721         print "<tr>" .
4722               "<td>tree</td>" .
4723               "<td class=\"sha1\">" .
4724               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4725                        class => "list"}, $co{'tree'}) .
4726               "</td>" .
4727               "<td class=\"link\">" .
4728               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4729                       "tree");
4730         my $snapshot_links = format_snapshot_links($hash);
4731         if (defined $snapshot_links) {
4732                 print " | " . $snapshot_links;
4733         }
4734         print "</td>" .
4735               "</tr>\n";
4736
4737         foreach my $par (@$parents) {
4738                 print "<tr>" .
4739                       "<td>parent</td>" .
4740                       "<td class=\"sha1\">" .
4741                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4742                                class => "list"}, $par) .
4743                       "</td>" .
4744                       "<td class=\"link\">" .
4745                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4746                       " | " .
4747                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4748                       "</td>" .
4749                       "</tr>\n";
4750         }
4751         print "</table>".
4752               "</div>\n";
4753
4754         print "<div class=\"page_body\">\n";
4755         git_print_log($co{'comment'});
4756         print "</div>\n";
4757
4758         git_difftree_body(\@difftree, $hash, @$parents);
4759
4760         git_footer_html();
4761 }
4762
4763 sub git_object {
4764         # object is defined by:
4765         # - hash or hash_base alone
4766         # - hash_base and file_name
4767         my $type;
4768
4769         # - hash or hash_base alone
4770         if ($hash || ($hash_base && !defined $file_name)) {
4771                 my $object_id = $hash || $hash_base;
4772
4773                 my $git_command = git_cmd_str();
4774                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4775                         or die_error('404 Not Found', "Object does not exist");
4776                 $type = <$fd>;
4777                 chomp $type;
4778                 close $fd
4779                         or die_error('404 Not Found', "Object does not exist");
4780
4781         # - hash_base and file_name
4782         } elsif ($hash_base && defined $file_name) {
4783                 $file_name =~ s,/+$,,;
4784
4785                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4786                         or die_error('404 Not Found', "Base object does not exist");
4787
4788                 # here errors should not hapen
4789                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4790                         or die_error(undef, "Open git-ls-tree failed");
4791                 my $line = <$fd>;
4792                 close $fd;
4793
4794                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4795                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4796                         die_error('404 Not Found', "File or directory for given base does not exist");
4797                 }
4798                 $type = $2;
4799                 $hash = $3;
4800         } else {
4801                 die_error('404 Not Found', "Not enough information to find object");
4802         }
4803
4804         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4805                                           hash=>$hash, hash_base=>$hash_base,
4806                                           file_name=>$file_name),
4807                              -status => '302 Found');
4808 }
4809
4810 sub git_blobdiff {
4811         my $format = shift || 'html';
4812
4813         my $fd;
4814         my @difftree;
4815         my %diffinfo;
4816         my $expires;
4817
4818         # preparing $fd and %diffinfo for git_patchset_body
4819         # new style URI
4820         if (defined $hash_base && defined $hash_parent_base) {
4821                 if (defined $file_name) {
4822                         # read raw output
4823                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4824                                 $hash_parent_base, $hash_base,
4825                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4826                                 or die_error(undef, "Open git-diff-tree failed");
4827                         @difftree = map { chomp; $_ } <$fd>;
4828                         close $fd
4829                                 or die_error(undef, "Reading git-diff-tree failed");
4830                         @difftree
4831                                 or die_error('404 Not Found', "Blob diff not found");
4832
4833                 } elsif (defined $hash &&
4834                          $hash =~ /[0-9a-fA-F]{40}/) {
4835                         # try to find filename from $hash
4836
4837                         # read filtered raw output
4838                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4839                                 $hash_parent_base, $hash_base, "--"
4840                                 or die_error(undef, "Open git-diff-tree failed");
4841                         @difftree =
4842                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4843                                 # $hash == to_id
4844                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4845                                 map { chomp; $_ } <$fd>;
4846                         close $fd
4847                                 or die_error(undef, "Reading git-diff-tree failed");
4848                         @difftree
4849                                 or die_error('404 Not Found', "Blob diff not found");
4850
4851                 } else {
4852                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4853                 }
4854
4855                 if (@difftree > 1) {
4856                         die_error('404 Not Found', "Ambiguous blob diff specification");
4857                 }
4858
4859                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4860                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4861                 $file_name   ||= $diffinfo{'to_file'};
4862
4863                 $hash_parent ||= $diffinfo{'from_id'};
4864                 $hash        ||= $diffinfo{'to_id'};
4865
4866                 # non-textual hash id's can be cached
4867                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4868                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4869                         $expires = '+1d';
4870                 }
4871
4872                 # open patch output
4873                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4874                         '-p', ($format eq 'html' ? "--full-index" : ()),
4875                         $hash_parent_base, $hash_base,
4876                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4877                         or die_error(undef, "Open git-diff-tree failed");
4878         }
4879
4880         # old/legacy style URI -- not generated anymore since 1.4.3.
4881         if (!%diffinfo) {
4882                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4883         }
4884
4885         # header
4886         if ($format eq 'html') {
4887                 my $formats_nav =
4888                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4889                                 "raw");
4890                 git_header_html(undef, $expires);
4891                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4892                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4893                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4894                 } else {
4895                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4896                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4897                 }
4898                 if (defined $file_name) {
4899                         git_print_page_path($file_name, "blob", $hash_base);
4900                 } else {
4901                         print "<div class=\"page_path\"></div>\n";
4902                 }
4903
4904         } elsif ($format eq 'plain') {
4905                 print $cgi->header(
4906                         -type => 'text/plain',
4907                         -charset => 'utf-8',
4908                         -expires => $expires,
4909                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4910
4911                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4912
4913         } else {
4914                 die_error(undef, "Unknown blobdiff format");
4915         }
4916
4917         # patch
4918         if ($format eq 'html') {
4919                 print "<div class=\"page_body\">\n";
4920
4921                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4922                 close $fd;
4923
4924                 print "</div>\n"; # class="page_body"
4925                 git_footer_html();
4926
4927         } else {
4928                 while (my $line = <$fd>) {
4929                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4930                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4931
4932                         print $line;
4933
4934                         last if $line =~ m!^\+\+\+!;
4935                 }
4936                 local $/ = undef;
4937                 print <$fd>;
4938                 close $fd;
4939         }
4940 }
4941
4942 sub git_blobdiff_plain {
4943         git_blobdiff('plain');
4944 }
4945
4946 sub git_commitdiff {
4947         my $format = shift || 'html';
4948         $hash ||= $hash_base || "HEAD";
4949         my %co = parse_commit($hash);
4950         if (!%co) {
4951                 die_error(undef, "Unknown commit object");
4952         }
4953
4954         # choose format for commitdiff for merge
4955         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4956                 $hash_parent = '--cc';
4957         }
4958         # we need to prepare $formats_nav before almost any parameter munging
4959         my $formats_nav;
4960         if ($format eq 'html') {
4961                 $formats_nav =
4962                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4963                                 "raw");
4964
4965                 if (defined $hash_parent &&
4966                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4967                         # commitdiff with two commits given
4968                         my $hash_parent_short = $hash_parent;
4969                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4970                                 $hash_parent_short = substr($hash_parent, 0, 7);
4971                         }
4972                         $formats_nav .=
4973                                 ' (from';
4974                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4975                                 if ($co{'parents'}[$i] eq $hash_parent) {
4976                                         $formats_nav .= ' parent ' . ($i+1);
4977                                         last;
4978                                 }
4979                         }
4980                         $formats_nav .= ': ' .
4981                                 $cgi->a({-href => href(action=>"commitdiff",
4982                                                        hash=>$hash_parent)},
4983                                         esc_html($hash_parent_short)) .
4984                                 ')';
4985                 } elsif (!$co{'parent'}) {
4986                         # --root commitdiff
4987                         $formats_nav .= ' (initial)';
4988                 } elsif (scalar @{$co{'parents'}} == 1) {
4989                         # single parent commit
4990                         $formats_nav .=
4991                                 ' (parent: ' .
4992                                 $cgi->a({-href => href(action=>"commitdiff",
4993                                                        hash=>$co{'parent'})},
4994                                         esc_html(substr($co{'parent'}, 0, 7))) .
4995                                 ')';
4996                 } else {
4997                         # merge commit
4998                         if ($hash_parent eq '--cc') {
4999                                 $formats_nav .= ' | ' .
5000                                         $cgi->a({-href => href(action=>"commitdiff",
5001                                                                hash=>$hash, hash_parent=>'-c')},
5002                                                 'combined');
5003                         } else { # $hash_parent eq '-c'
5004                                 $formats_nav .= ' | ' .
5005                                         $cgi->a({-href => href(action=>"commitdiff",
5006                                                                hash=>$hash, hash_parent=>'--cc')},
5007                                                 'compact');
5008                         }
5009                         $formats_nav .=
5010                                 ' (merge: ' .
5011                                 join(' ', map {
5012                                         $cgi->a({-href => href(action=>"commitdiff",
5013                                                                hash=>$_)},
5014                                                 esc_html(substr($_, 0, 7)));
5015                                 } @{$co{'parents'}} ) .
5016                                 ')';
5017                 }
5018         }
5019
5020         my $hash_parent_param = $hash_parent;
5021         if (!defined $hash_parent_param) {
5022                 # --cc for multiple parents, --root for parentless
5023                 $hash_parent_param =
5024                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5025         }
5026
5027         # read commitdiff
5028         my $fd;
5029         my @difftree;
5030         if ($format eq 'html') {
5031                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5032                         "--no-commit-id", "--patch-with-raw", "--full-index",
5033                         $hash_parent_param, $hash, "--"
5034                         or die_error(undef, "Open git-diff-tree failed");
5035
5036                 while (my $line = <$fd>) {
5037                         chomp $line;
5038                         # empty line ends raw part of diff-tree output
5039                         last unless $line;
5040                         push @difftree, scalar parse_difftree_raw_line($line);
5041                 }
5042
5043         } elsif ($format eq 'plain') {
5044                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5045                         '-p', $hash_parent_param, $hash, "--"
5046                         or die_error(undef, "Open git-diff-tree failed");
5047
5048         } else {
5049                 die_error(undef, "Unknown commitdiff format");
5050         }
5051
5052         # non-textual hash id's can be cached
5053         my $expires;
5054         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5055                 $expires = "+1d";
5056         }
5057
5058         # write commit message
5059         if ($format eq 'html') {
5060                 my $refs = git_get_references();
5061                 my $ref = format_ref_marker($refs, $co{'id'});
5062
5063                 git_header_html(undef, $expires);
5064                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5065                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5066                 git_print_authorship(\%co);
5067                 print "<div class=\"page_body\">\n";
5068                 if (@{$co{'comment'}} > 1) {
5069                         print "<div class=\"log\">\n";
5070                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5071                         print "</div>\n"; # class="log"
5072                 }
5073
5074         } elsif ($format eq 'plain') {
5075                 my $refs = git_get_references("tags");
5076                 my $tagname = git_get_rev_name_tags($hash);
5077                 my $filename = basename($project) . "-$hash.patch";
5078
5079                 print $cgi->header(
5080                         -type => 'text/plain',
5081                         -charset => 'utf-8',
5082                         -expires => $expires,
5083                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5084                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5085                 print "From: " . to_utf8($co{'author'}) . "\n";
5086                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5087                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5088
5089                 print "X-Git-Tag: $tagname\n" if $tagname;
5090                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5091
5092                 foreach my $line (@{$co{'comment'}}) {
5093                         print to_utf8($line) . "\n";
5094                 }
5095                 print "---\n\n";
5096         }
5097
5098         # write patch
5099         if ($format eq 'html') {
5100                 my $use_parents = !defined $hash_parent ||
5101                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5102                 git_difftree_body(\@difftree, $hash,
5103                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5104                 print "<br/>\n";
5105
5106                 git_patchset_body($fd, \@difftree, $hash,
5107                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5108                 close $fd;
5109                 print "</div>\n"; # class="page_body"
5110                 git_footer_html();
5111
5112         } elsif ($format eq 'plain') {
5113                 local $/ = undef;
5114                 print <$fd>;
5115                 close $fd
5116                         or print "Reading git-diff-tree failed\n";
5117         }
5118 }
5119
5120 sub git_commitdiff_plain {
5121         git_commitdiff('plain');
5122 }
5123
5124 sub git_history {
5125         if (!defined $hash_base) {
5126                 $hash_base = git_get_head_hash($project);
5127         }
5128         if (!defined $page) {
5129                 $page = 0;
5130         }
5131         my $ftype;
5132         my %co = parse_commit($hash_base);
5133         if (!%co) {
5134                 die_error(undef, "Unknown commit object");
5135         }
5136
5137         my $refs = git_get_references();
5138         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5139
5140         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5141                                        $file_name, "--full-history");
5142         if (!@commitlist) {
5143                 die_error('404 Not Found', "No such file or directory on given branch");
5144         }
5145
5146         if (!defined $hash && defined $file_name) {
5147                 # some commits could have deleted file in question,
5148                 # and not have it in tree, but one of them has to have it
5149                 for (my $i = 0; $i <= @commitlist; $i++) {
5150                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5151                         last if defined $hash;
5152                 }
5153         }
5154         if (defined $hash) {
5155                 $ftype = git_get_type($hash);
5156         }
5157         if (!defined $ftype) {
5158                 die_error(undef, "Unknown type of object");
5159         }
5160
5161         my $paging_nav = '';
5162         if ($page > 0) {
5163                 $paging_nav .=
5164                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5165                                                file_name=>$file_name)},
5166                                 "first");
5167                 $paging_nav .= " &sdot; " .
5168                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5169                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5170         } else {
5171                 $paging_nav .= "first";
5172                 $paging_nav .= " &sdot; prev";
5173         }
5174         my $next_link = '';
5175         if ($#commitlist >= 100) {
5176                 $next_link =
5177                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5178                                  -accesskey => "n", -title => "Alt-n"}, "next");
5179                 $paging_nav .= " &sdot; $next_link";
5180         } else {
5181                 $paging_nav .= " &sdot; next";
5182         }
5183
5184         git_header_html();
5185         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5186         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5187         git_print_page_path($file_name, $ftype, $hash_base);
5188
5189         git_history_body(\@commitlist, 0, 99,
5190                          $refs, $hash_base, $ftype, $next_link);
5191
5192         git_footer_html();
5193 }
5194
5195 sub git_search {
5196         my ($have_search) = gitweb_check_feature('search');
5197         if (!$have_search) {
5198                 die_error('403 Permission denied', "Permission denied");
5199         }
5200         if (!defined $searchtext) {
5201                 die_error(undef, "Text field empty");
5202         }
5203         if (!defined $hash) {
5204                 $hash = git_get_head_hash($project);
5205         }
5206         my %co = parse_commit($hash);
5207         if (!%co) {
5208                 die_error(undef, "Unknown commit object");
5209         }
5210         if (!defined $page) {
5211                 $page = 0;
5212         }
5213
5214         $searchtype ||= 'commit';
5215         if ($searchtype eq 'pickaxe') {
5216                 # pickaxe may take all resources of your box and run for several minutes
5217                 # with every query - so decide by yourself how public you make this feature
5218                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5219                 if (!$have_pickaxe) {
5220                         die_error('403 Permission denied', "Permission denied");
5221                 }
5222         }
5223         if ($searchtype eq 'grep') {
5224                 my ($have_grep) = gitweb_check_feature('grep');
5225                 if (!$have_grep) {
5226                         die_error('403 Permission denied', "Permission denied");
5227                 }
5228         }
5229
5230         git_header_html();
5231
5232         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5233                 my $greptype;
5234                 if ($searchtype eq 'commit') {
5235                         $greptype = "--grep=";
5236                 } elsif ($searchtype eq 'author') {
5237                         $greptype = "--author=";
5238                 } elsif ($searchtype eq 'committer') {
5239                         $greptype = "--committer=";
5240                 }
5241                 $greptype .= $searchtext;
5242                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5243                                                $greptype, '--regexp-ignore-case',
5244                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5245
5246                 my $paging_nav = '';
5247                 if ($page > 0) {
5248                         $paging_nav .=
5249                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5250                                                        searchtext=>$searchtext,
5251                                                        searchtype=>$searchtype)},
5252                                         "first");
5253                         $paging_nav .= " &sdot; " .
5254                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5255                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5256                 } else {
5257                         $paging_nav .= "first";
5258                         $paging_nav .= " &sdot; prev";
5259                 }
5260                 my $next_link = '';
5261                 if ($#commitlist >= 100) {
5262                         $next_link =
5263                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5264                                          -accesskey => "n", -title => "Alt-n"}, "next");
5265                         $paging_nav .= " &sdot; $next_link";
5266                 } else {
5267                         $paging_nav .= " &sdot; next";
5268                 }
5269
5270                 if ($#commitlist >= 100) {
5271                 }
5272
5273                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5274                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5275                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5276         }
5277
5278         if ($searchtype eq 'pickaxe') {
5279                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5280                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5281
5282                 print "<table class=\"pickaxe search\">\n";
5283                 my $alternate = 1;
5284                 $/ = "\n";
5285                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5286                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5287                         ($search_use_regexp ? '--pickaxe-regex' : ());
5288                 undef %co;
5289                 my @files;
5290                 while (my $line = <$fd>) {
5291                         chomp $line;
5292                         next unless $line;
5293
5294                         my %set = parse_difftree_raw_line($line);
5295                         if (defined $set{'commit'}) {
5296                                 # finish previous commit
5297                                 if (%co) {
5298                                         print "</td>\n" .
5299                                               "<td class=\"link\">" .
5300                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5301                                               " | " .
5302                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5303                                         print "</td>\n" .
5304                                               "</tr>\n";
5305                                 }
5306
5307                                 if ($alternate) {
5308                                         print "<tr class=\"dark\">\n";
5309                                 } else {
5310                                         print "<tr class=\"light\">\n";
5311                                 }
5312                                 $alternate ^= 1;
5313                                 %co = parse_commit($set{'commit'});
5314                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5315                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5316                                       "<td><i>$author</i></td>\n" .
5317                                       "<td>" .
5318                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5319                                               -class => "list subject"},
5320                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5321                         } elsif (defined $set{'to_id'}) {
5322                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5323
5324                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5325                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5326                                               -class => "list"},
5327                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5328                                       "<br/>\n";
5329                         }
5330                 }
5331                 close $fd;
5332
5333                 # finish last commit (warning: repetition!)
5334                 if (%co) {
5335                         print "</td>\n" .
5336                               "<td class=\"link\">" .
5337                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5338                               " | " .
5339                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5340                         print "</td>\n" .
5341                               "</tr>\n";
5342                 }
5343
5344                 print "</table>\n";
5345         }
5346
5347         if ($searchtype eq 'grep') {
5348                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5349                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5350
5351                 print "<table class=\"grep_search\">\n";
5352                 my $alternate = 1;
5353                 my $matches = 0;
5354                 $/ = "\n";
5355                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5356                         $search_use_regexp ? ('-E', '-i') : '-F',
5357                         $searchtext, $co{'tree'};
5358                 my $lastfile = '';
5359                 while (my $line = <$fd>) {
5360                         chomp $line;
5361                         my ($file, $lno, $ltext, $binary);
5362                         last if ($matches++ > 1000);
5363                         if ($line =~ /^Binary file (.+) matches$/) {
5364                                 $file = $1;
5365                                 $binary = 1;
5366                         } else {
5367                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5368                         }
5369                         if ($file ne $lastfile) {
5370                                 $lastfile and print "</td></tr>\n";
5371                                 if ($alternate++) {
5372                                         print "<tr class=\"dark\">\n";
5373                                 } else {
5374                                         print "<tr class=\"light\">\n";
5375                                 }
5376                                 print "<td class=\"list\">".
5377                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5378                                                                file_name=>"$file"),
5379                                                 -class => "list"}, esc_path($file));
5380                                 print "</td><td>\n";
5381                                 $lastfile = $file;
5382                         }
5383                         if ($binary) {
5384                                 print "<div class=\"binary\">Binary file</div>\n";
5385                         } else {
5386                                 $ltext = untabify($ltext);
5387                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5388                                         $ltext = esc_html($1, -nbsp=>1);
5389                                         $ltext .= '<span class="match">';
5390                                         $ltext .= esc_html($2, -nbsp=>1);
5391                                         $ltext .= '</span>';
5392                                         $ltext .= esc_html($3, -nbsp=>1);
5393                                 } else {
5394                                         $ltext = esc_html($ltext, -nbsp=>1);
5395                                 }
5396                                 print "<div class=\"pre\">" .
5397                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5398                                                                file_name=>"$file").'#l'.$lno,
5399                                                 -class => "linenr"}, sprintf('%4i', $lno))
5400                                         . ' ' .  $ltext . "</div>\n";
5401                         }
5402                 }
5403                 if ($lastfile) {
5404                         print "</td></tr>\n";
5405                         if ($matches > 1000) {
5406                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5407                         }
5408                 } else {
5409                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5410                 }
5411                 close $fd;
5412
5413                 print "</table>\n";
5414         }
5415         git_footer_html();
5416 }
5417
5418 sub git_search_help {
5419         git_header_html();
5420         git_print_page_nav('','', $hash,$hash,$hash);
5421         print <<EOT;
5422 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5423 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5424 the pattern entered is recognized as the POSIX extended
5425 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5426 insensitive).</p>
5427 <dl>
5428 <dt><b>commit</b></dt>
5429 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5430 EOT
5431         my ($have_grep) = gitweb_check_feature('grep');
5432         if ($have_grep) {
5433                 print <<EOT;
5434 <dt><b>grep</b></dt>
5435 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5436     a different one) are searched for the given pattern. On large trees, this search can take
5437 a while and put some strain on the server, so please use it with some consideration. Note that
5438 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5439 case-sensitive.</dd>
5440 EOT
5441         }
5442         print <<EOT;
5443 <dt><b>author</b></dt>
5444 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5445 <dt><b>committer</b></dt>
5446 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5447 EOT
5448         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5449         if ($have_pickaxe) {
5450                 print <<EOT;
5451 <dt><b>pickaxe</b></dt>
5452 <dd>All commits that caused the string to appear or disappear from any file (changes that
5453 added, removed or "modified" the string) will be listed. This search can take a while and
5454 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5455 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5456 EOT
5457         }
5458         print "</dl>\n";
5459         git_footer_html();
5460 }
5461
5462 sub git_shortlog {
5463         my $head = git_get_head_hash($project);
5464         if (!defined $hash) {
5465                 $hash = $head;
5466         }
5467         if (!defined $page) {
5468                 $page = 0;
5469         }
5470         my $refs = git_get_references();
5471
5472         my @commitlist = parse_commits($hash, 101, (100 * $page));
5473
5474         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5475         my $next_link = '';
5476         if ($#commitlist >= 100) {
5477                 $next_link =
5478                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5479                                  -accesskey => "n", -title => "Alt-n"}, "next");
5480         }
5481
5482         git_header_html();
5483         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5484         git_print_header_div('summary', $project);
5485
5486         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5487
5488         git_footer_html();
5489 }
5490
5491 ## ......................................................................
5492 ## feeds (RSS, Atom; OPML)
5493
5494 sub git_feed {
5495         my $format = shift || 'atom';
5496         my ($have_blame) = gitweb_check_feature('blame');
5497
5498         # Atom: http://www.atomenabled.org/developers/syndication/
5499         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5500         if ($format ne 'rss' && $format ne 'atom') {
5501                 die_error(undef, "Unknown web feed format");
5502         }
5503
5504         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5505         my $head = $hash || 'HEAD';
5506         my @commitlist = parse_commits($head, 150, 0, $file_name);
5507
5508         my %latest_commit;
5509         my %latest_date;
5510         my $content_type = "application/$format+xml";
5511         if (defined $cgi->http('HTTP_ACCEPT') &&
5512                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5513                 # browser (feed reader) prefers text/xml
5514                 $content_type = 'text/xml';
5515         }
5516         if (defined($commitlist[0])) {
5517                 %latest_commit = %{$commitlist[0]};
5518                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5519                 print $cgi->header(
5520                         -type => $content_type,
5521                         -charset => 'utf-8',
5522                         -last_modified => $latest_date{'rfc2822'});
5523         } else {
5524                 print $cgi->header(
5525                         -type => $content_type,
5526                         -charset => 'utf-8');
5527         }
5528
5529         # Optimization: skip generating the body if client asks only
5530         # for Last-Modified date.
5531         return if ($cgi->request_method() eq 'HEAD');
5532
5533         # header variables
5534         my $title = "$site_name - $project/$action";
5535         my $feed_type = 'log';
5536         if (defined $hash) {
5537                 $title .= " - '$hash'";
5538                 $feed_type = 'branch log';
5539                 if (defined $file_name) {
5540                         $title .= " :: $file_name";
5541                         $feed_type = 'history';
5542                 }
5543         } elsif (defined $file_name) {
5544                 $title .= " - $file_name";
5545                 $feed_type = 'history';
5546         }
5547         $title .= " $feed_type";
5548         my $descr = git_get_project_description($project);
5549         if (defined $descr) {
5550                 $descr = esc_html($descr);
5551         } else {
5552                 $descr = "$project " .
5553                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5554                          " feed";
5555         }
5556         my $owner = git_get_project_owner($project);
5557         $owner = esc_html($owner);
5558
5559         #header
5560         my $alt_url;
5561         if (defined $file_name) {
5562                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5563         } elsif (defined $hash) {
5564                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5565         } else {
5566                 $alt_url = href(-full=>1, action=>"summary");
5567         }
5568         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5569         if ($format eq 'rss') {
5570                 print <<XML;
5571 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5572 <channel>
5573 XML
5574                 print "<title>$title</title>\n" .
5575                       "<link>$alt_url</link>\n" .
5576                       "<description>$descr</description>\n" .
5577                       "<language>en</language>\n";
5578         } elsif ($format eq 'atom') {
5579                 print <<XML;
5580 <feed xmlns="http://www.w3.org/2005/Atom">
5581 XML
5582                 print "<title>$title</title>\n" .
5583                       "<subtitle>$descr</subtitle>\n" .
5584                       '<link rel="alternate" type="text/html" href="' .
5585                       $alt_url . '" />' . "\n" .
5586                       '<link rel="self" type="' . $content_type . '" href="' .
5587                       $cgi->self_url() . '" />' . "\n" .
5588                       "<id>" . href(-full=>1) . "</id>\n" .
5589                       # use project owner for feed author
5590                       "<author><name>$owner</name></author>\n";
5591                 if (defined $favicon) {
5592                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5593                 }
5594                 if (defined $logo_url) {
5595                         # not twice as wide as tall: 72 x 27 pixels
5596                         print "<logo>" . esc_url($logo) . "</logo>\n";
5597                 }
5598                 if (! %latest_date) {
5599                         # dummy date to keep the feed valid until commits trickle in:
5600                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5601                 } else {
5602                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5603                 }
5604         }
5605
5606         # contents
5607         for (my $i = 0; $i <= $#commitlist; $i++) {
5608                 my %co = %{$commitlist[$i]};
5609                 my $commit = $co{'id'};
5610                 # we read 150, we always show 30 and the ones more recent than 48 hours
5611                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5612                         last;
5613                 }
5614                 my %cd = parse_date($co{'author_epoch'});
5615
5616                 # get list of changed files
5617                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5618                         $co{'parent'} || "--root",
5619                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5620                         or next;
5621                 my @difftree = map { chomp; $_ } <$fd>;
5622                 close $fd
5623                         or next;
5624
5625                 # print element (entry, item)
5626                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5627                 if ($format eq 'rss') {
5628                         print "<item>\n" .
5629                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5630                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5631                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5632                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5633                               "<link>$co_url</link>\n" .
5634                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5635                               "<content:encoded>" .
5636                               "<![CDATA[\n";
5637                 } elsif ($format eq 'atom') {
5638                         print "<entry>\n" .
5639                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5640                               "<updated>$cd{'iso-8601'}</updated>\n" .
5641                               "<author>\n" .
5642                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5643                         if ($co{'author_email'}) {
5644                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5645                         }
5646                         print "</author>\n" .
5647                               # use committer for contributor
5648                               "<contributor>\n" .
5649                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5650                         if ($co{'committer_email'}) {
5651                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5652                         }
5653                         print "</contributor>\n" .
5654                               "<published>$cd{'iso-8601'}</published>\n" .
5655                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5656                               "<id>$co_url</id>\n" .
5657                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5658                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5659                 }
5660                 my $comment = $co{'comment'};
5661                 print "<pre>\n";
5662                 foreach my $line (@$comment) {
5663                         $line = esc_html($line);
5664                         print "$line\n";
5665                 }
5666                 print "</pre><ul>\n";
5667                 foreach my $difftree_line (@difftree) {
5668                         my %difftree = parse_difftree_raw_line($difftree_line);
5669                         next if !$difftree{'from_id'};
5670
5671                         my $file = $difftree{'file'} || $difftree{'to_file'};
5672
5673                         print "<li>" .
5674                               "[" .
5675                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5676                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5677                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5678                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5679                                       -title => "diff"}, 'D');
5680                         if ($have_blame) {
5681                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5682                                                              file_name=>$file, hash_base=>$commit),
5683                                               -title => "blame"}, 'B');
5684                         }
5685                         # if this is not a feed of a file history
5686                         if (!defined $file_name || $file_name ne $file) {
5687                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5688                                                              file_name=>$file, hash=>$commit),
5689                                               -title => "history"}, 'H');
5690                         }
5691                         $file = esc_path($file);
5692                         print "] ".
5693                               "$file</li>\n";
5694                 }
5695                 if ($format eq 'rss') {
5696                         print "</ul>]]>\n" .
5697                               "</content:encoded>\n" .
5698                               "</item>\n";
5699                 } elsif ($format eq 'atom') {
5700                         print "</ul>\n</div>\n" .
5701                               "</content>\n" .
5702                               "</entry>\n";
5703                 }
5704         }
5705
5706         # end of feed
5707         if ($format eq 'rss') {
5708                 print "</channel>\n</rss>\n";
5709         }       elsif ($format eq 'atom') {
5710                 print "</feed>\n";
5711         }
5712 }
5713
5714 sub git_rss {
5715         git_feed('rss');
5716 }
5717
5718 sub git_atom {
5719         git_feed('atom');
5720 }
5721
5722 sub git_opml {
5723         my @list = git_get_projects_list();
5724
5725         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5726         print <<XML;
5727 <?xml version="1.0" encoding="utf-8"?>
5728 <opml version="1.0">
5729 <head>
5730   <title>$site_name OPML Export</title>
5731 </head>
5732 <body>
5733 <outline text="git RSS feeds">
5734 XML
5735
5736         foreach my $pr (@list) {
5737                 my %proj = %$pr;
5738                 my $head = git_get_head_hash($proj{'path'});
5739                 if (!defined $head) {
5740                         next;
5741                 }
5742                 $git_dir = "$projectroot/$proj{'path'}";
5743                 my %co = parse_commit($head);
5744                 if (!%co) {
5745                         next;
5746                 }
5747
5748                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5749                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5750                 my $html = "$my_url?p=$proj{'path'};a=summary";
5751                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5752         }
5753         print <<XML;
5754 </outline>
5755 </body>
5756 </opml>
5757 XML
5758 }