Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64
  65 # URI of GIT logo (72x27 size)
  66 our $logo = "++GITWEB_LOGO++";
  67 # URI of GIT favicon, assumed to be image/png type
  68 our $favicon = "++GITWEB_FAVICON++";
  69
  70 # URI and label (title) of GIT logo link
  71 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  72 #our $logo_label = "git documentation";
  73 our $logo_url = "http://git.or.cz/";
  74 our $logo_label = "git homepage";
  75
  76 # source of projects list
  77 our $projects_list = "++GITWEB_LIST++";
  78
  79 # the width (in characters) of the projects list "Description" column
  80 our $projects_list_description_width = 25;
  81
  82 # default order of projects list
  83 # valid values are none, project, descr, owner, and age
  84 our $default_projects_order = "project";
  85
  86 # show repository only if this file exists
  87 # (only effective if this variable evaluates to true)
  88 our $export_ok = "++GITWEB_EXPORT_OK++";
  89
  90 # only allow viewing of repositories also shown on the overview page
  91 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  92
  93 # list of git base URLs used for URL to where fetch project from,
  94 # i.e. full URL is "$git_base_url/$project"
  95 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  96
  97 # default blob_plain mimetype and default charset for text/plain blob
  98 our $default_blob_plain_mimetype = 'text/plain';
  99 our $default_text_plain_charset  = undef;
 100
 101 # file to use for guessing MIME types before trying /etc/mime.types
 102 # (relative to the current git repository)
 103 our $mimetypes_file = undef;
 104
 105 # assume this charset if line contains non-UTF-8 characters;
 106 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 107 # for which encoding all byte sequences are valid, for example
 108 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 109 # could be even 'utf-8' for the old behavior)
 110 our $fallback_encoding = 'latin1';
 111
 112 # rename detection options for git-diff and git-diff-tree
 113 # - default is '-M', with the cost proportional to
 114 #   (number of removed files) * (number of new files).
 115 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 116 #   (number of changed files + number of removed files) * (number of new files)
 117 # - even more costly is '-C', '--find-copies-harder' with cost
 118 #   (number of files in the original tree) * (number of new files)
 119 # - one might want to include '-B' option, e.g. '-B', '-M'
 120 our @diff_opts = ('-M'); # taken from git_commit
 121
 122 # information about snapshot formats that gitweb is capable of serving
 123 our %known_snapshot_formats = (
 124         # name => {
 125         #       'display' => display name,
 126         #       'type' => mime type,
 127         #       'suffix' => filename suffix,
 128         #       'format' => --format for git-archive,
 129         #       'compressor' => [compressor command and arguments]
 130         #                       (array reference, optional)}
 131         #
 132         'tgz' => {
 133                 'display' => 'tar.gz',
 134                 'type' => 'application/x-gzip',
 135                 'suffix' => '.tar.gz',
 136                 'format' => 'tar',
 137                 'compressor' => ['gzip']},
 138
 139         'tbz2' => {
 140                 'display' => 'tar.bz2',
 141                 'type' => 'application/x-bzip2',
 142                 'suffix' => '.tar.bz2',
 143                 'format' => 'tar',
 144                 'compressor' => ['bzip2']},
 145
 146         'zip' => {
 147                 'display' => 'zip',
 148                 'type' => 'application/x-zip',
 149                 'suffix' => '.zip',
 150                 'format' => 'zip'},
 151 );
 152
 153 # Aliases so we understand old gitweb.snapshot values in repository
 154 # configuration.
 155 our %known_snapshot_format_aliases = (
 156         'gzip'  => 'tgz',
 157         'bzip2' => 'tbz2',
 158
 159         # backward compatibility: legacy gitweb config support
 160         'x-gzip' => undef, 'gz' => undef,
 161         'x-bzip2' => undef, 'bz2' => undef,
 162         'x-zip' => undef, '' => undef,
 163 );
 164
 165 # You define site-wide feature defaults here; override them with
 166 # $GITWEB_CONFIG as necessary.
 167 our %feature = (
 168         # feature => {
 169         #       'sub' => feature-sub (subroutine),
 170         #       'override' => allow-override (boolean),
 171         #       'default' => [ default options...] (array reference)}
 172         #
 173         # if feature is overridable (it means that allow-override has true value),
 174         # then feature-sub will be called with default options as parameters;
 175         # return value of feature-sub indicates if to enable specified feature
 176         #
 177         # if there is no 'sub' key (no feature-sub), then feature cannot be
 178         # overriden
 179         #
 180         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 181
 182         # Enable the 'blame' blob view, showing the last commit that modified
 183         # each line in the file. This can be very CPU-intensive.
 184
 185         # To enable system wide have in $GITWEB_CONFIG
 186         # $feature{'blame'}{'default'} = [1];
 187         # To have project specific config enable override in $GITWEB_CONFIG
 188         # $feature{'blame'}{'override'} = 1;
 189         # and in project config gitweb.blame = 0|1;
 190         'blame' => {
 191                 'sub' => \&feature_blame,
 192                 'override' => 0,
 193                 'default' => [0]},
 194
 195         # Enable the 'snapshot' link, providing a compressed archive of any
 196         # tree. This can potentially generate high traffic if you have large
 197         # project.
 198
 199         # Value is a list of formats defined in %known_snapshot_formats that
 200         # you wish to offer.
 201         # To disable system wide have in $GITWEB_CONFIG
 202         # $feature{'snapshot'}{'default'} = [];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'snapshot'}{'override'} = 1;
 205         # and in project config, a comma-separated list of formats or "none"
 206         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 207         'snapshot' => {
 208                 'sub' => \&feature_snapshot,
 209                 'override' => 0,
 210                 'default' => ['tgz']},
 211
 212         # Enable text search, which will list the commits which match author,
 213         # committer or commit text to a given string.  Enabled by default.
 214         # Project specific override is not supported.
 215         'search' => {
 216                 'override' => 0,
 217                 'default' => [1]},
 218
 219         # Enable grep search, which will list the files in currently selected
 220         # tree containing the given string. Enabled by default. This can be
 221         # potentially CPU-intensive, of course.
 222
 223         # To enable system wide have in $GITWEB_CONFIG
 224         # $feature{'grep'}{'default'} = [1];
 225         # To have project specific config enable override in $GITWEB_CONFIG
 226         # $feature{'grep'}{'override'} = 1;
 227         # and in project config gitweb.grep = 0|1;
 228         'grep' => {
 229                 'override' => 0,
 230                 'default' => [1]},
 231
 232         # Enable the pickaxe search, which will list the commits that modified
 233         # a given string in a file. This can be practical and quite faster
 234         # alternative to 'blame', but still potentially CPU-intensive.
 235
 236         # To enable system wide have in $GITWEB_CONFIG
 237         # $feature{'pickaxe'}{'default'} = [1];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'pickaxe'}{'override'} = 1;
 240         # and in project config gitweb.pickaxe = 0|1;
 241         'pickaxe' => {
 242                 'sub' => \&feature_pickaxe,
 243                 'override' => 0,
 244                 'default' => [1]},
 245
 246         # Make gitweb use an alternative format of the URLs which can be
 247         # more readable and natural-looking: project name is embedded
 248         # directly in the path and the query string contains other
 249         # auxiliary information. All gitweb installations recognize
 250         # URL in either format; this configures in which formats gitweb
 251         # generates links.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pathinfo'}{'default'} = [1];
 255         # Project specific override is not supported.
 256
 257         # Note that you will need to change the default location of CSS,
 258         # favicon, logo and possibly other files to an absolute URL. Also,
 259         # if gitweb.cgi serves as your indexfile, you will need to force
 260         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 261         'pathinfo' => {
 262                 'override' => 0,
 263                 'default' => [0]},
 264
 265         # Make gitweb consider projects in project root subdirectories
 266         # to be forks of existing projects. Given project $projname.git,
 267         # projects matching $projname/*.git will not be shown in the main
 268         # projects list, instead a '+' mark will be added to $projname
 269         # there and a 'forks' view will be enabled for the project, listing
 270         # all the forks. If project list is taken from a file, forks have
 271         # to be listed after the main project.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'forks'}{'default'} = [1];
 275         # Project specific override is not supported.
 276         'forks' => {
 277                 'override' => 0,
 278                 'default' => [0]},
 279 );
 280
 281 sub gitweb_check_feature {
 282         my ($name) = @_;
 283         return unless exists $feature{$name};
 284         my ($sub, $override, @defaults) = (
 285                 $feature{$name}{'sub'},
 286                 $feature{$name}{'override'},
 287                 @{$feature{$name}{'default'}});
 288         if (!$override) { return @defaults; }
 289         if (!defined $sub) {
 290                 warn "feature $name is not overrideable";
 291                 return @defaults;
 292         }
 293         return $sub->(@defaults);
 294 }
 295
 296 sub feature_blame {
 297         my ($val) = git_get_project_config('blame', '--bool');
 298
 299         if ($val eq 'true') {
 300                 return 1;
 301         } elsif ($val eq 'false') {
 302                 return 0;
 303         }
 304
 305         return $_[0];
 306 }
 307
 308 sub feature_snapshot {
 309         my (@fmts) = @_;
 310
 311         my ($val) = git_get_project_config('snapshot');
 312
 313         if ($val) {
 314                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 # process alternate names for backward compatibility
 361 # filter out unsupported (unknown) snapshot formats
 362 sub filter_snapshot_fmts {
 363         my @fmts = @_;
 364
 365         @fmts = map {
 366                 exists $known_snapshot_format_aliases{$_} ?
 367                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 368         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 369
 370 }
 371
 372 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 373 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 374
 375 # version of the core git binary
 376 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 377
 378 $projects_list ||= $projectroot;
 379
 380 # ======================================================================
 381 # input validation and dispatch
 382 our $action = $cgi->param('a');
 383 if (defined $action) {
 384         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 385                 die_error(undef, "Invalid action parameter");
 386         }
 387 }
 388
 389 # parameters which are pathnames
 390 our $project = $cgi->param('p');
 391 if (defined $project) {
 392         if (!validate_pathname($project) ||
 393             !(-d "$projectroot/$project") ||
 394             !check_head_link("$projectroot/$project") ||
 395             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 396             ($strict_export && !project_in_list($project))) {
 397                 undef $project;
 398                 die_error(undef, "No such project");
 399         }
 400 }
 401
 402 our $file_name = $cgi->param('f');
 403 if (defined $file_name) {
 404         if (!validate_pathname($file_name)) {
 405                 die_error(undef, "Invalid file parameter");
 406         }
 407 }
 408
 409 our $file_parent = $cgi->param('fp');
 410 if (defined $file_parent) {
 411         if (!validate_pathname($file_parent)) {
 412                 die_error(undef, "Invalid file parent parameter");
 413         }
 414 }
 415
 416 # parameters which are refnames
 417 our $hash = $cgi->param('h');
 418 if (defined $hash) {
 419         if (!validate_refname($hash)) {
 420                 die_error(undef, "Invalid hash parameter");
 421         }
 422 }
 423
 424 our $hash_parent = $cgi->param('hp');
 425 if (defined $hash_parent) {
 426         if (!validate_refname($hash_parent)) {
 427                 die_error(undef, "Invalid hash parent parameter");
 428         }
 429 }
 430
 431 our $hash_base = $cgi->param('hb');
 432 if (defined $hash_base) {
 433         if (!validate_refname($hash_base)) {
 434                 die_error(undef, "Invalid hash base parameter");
 435         }
 436 }
 437
 438 my %allowed_options = (
 439         "--no-merges" => [ qw(rss atom log shortlog history) ],
 440 );
 441
 442 our @extra_options = $cgi->param('opt');
 443 if (defined @extra_options) {
 444         foreach my $opt (@extra_options) {
 445                 if (not exists $allowed_options{$opt}) {
 446                         die_error(undef, "Invalid option parameter");
 447                 }
 448                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 449                         die_error(undef, "Invalid option parameter for this action");
 450                 }
 451         }
 452 }
 453
 454 our $hash_parent_base = $cgi->param('hpb');
 455 if (defined $hash_parent_base) {
 456         if (!validate_refname($hash_parent_base)) {
 457                 die_error(undef, "Invalid hash parent base parameter");
 458         }
 459 }
 460
 461 # other parameters
 462 our $page = $cgi->param('pg');
 463 if (defined $page) {
 464         if ($page =~ m/[^0-9]/) {
 465                 die_error(undef, "Invalid page parameter");
 466         }
 467 }
 468
 469 our $searchtype = $cgi->param('st');
 470 if (defined $searchtype) {
 471         if ($searchtype =~ m/[^a-z]/) {
 472                 die_error(undef, "Invalid searchtype parameter");
 473         }
 474 }
 475
 476 our $searchtext = $cgi->param('s');
 477 our $search_regexp;
 478 if (defined $searchtext) {
 479         if (length($searchtext) < 2) {
 480                 die_error(undef, "At least two characters are required for search parameter");
 481         }
 482         $search_regexp = quotemeta $searchtext;
 483 }
 484
 485 # now read PATH_INFO and use it as alternative to parameters
 486 sub evaluate_path_info {
 487         return if defined $project;
 488         my $path_info = $ENV{"PATH_INFO"};
 489         return if !$path_info;
 490         $path_info =~ s,^/+,,;
 491         return if !$path_info;
 492         # find which part of PATH_INFO is project
 493         $project = $path_info;
 494         $project =~ s,/+$,,;
 495         while ($project && !check_head_link("$projectroot/$project")) {
 496                 $project =~ s,/*[^/]*$,,;
 497         }
 498         # validate project
 499         $project = validate_pathname($project);
 500         if (!$project ||
 501             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 502             ($strict_export && !project_in_list($project))) {
 503                 undef $project;
 504                 return;
 505         }
 506         # do not change any parameters if an action is given using the query string
 507         return if $action;
 508         $path_info =~ s,^$project/*,,;
 509         my ($refname, $pathname) = split(/:/, $path_info, 2);
 510         if (defined $pathname) {
 511                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 512                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 513                 $pathname =~ s,^/+,,;
 514                 if (!$pathname || substr($pathname, -1) eq "/") {
 515                         $action  ||= "tree";
 516                         $pathname =~ s,/$,,;
 517                 } else {
 518                         $action  ||= "blob_plain";
 519                 }
 520                 $hash_base ||= validate_refname($refname);
 521                 $file_name ||= validate_pathname($pathname);
 522         } elsif (defined $refname) {
 523                 # we got "project.git/branch"
 524                 $action ||= "shortlog";
 525                 $hash   ||= validate_refname($refname);
 526         }
 527 }
 528 evaluate_path_info();
 529
 530 # path to the current git repository
 531 our $git_dir;
 532 $git_dir = "$projectroot/$project" if $project;
 533
 534 # dispatch
 535 my %actions = (
 536         "blame" => \&git_blame2,
 537         "blobdiff" => \&git_blobdiff,
 538         "blobdiff_plain" => \&git_blobdiff_plain,
 539         "blob" => \&git_blob,
 540         "blob_plain" => \&git_blob_plain,
 541         "commitdiff" => \&git_commitdiff,
 542         "commitdiff_plain" => \&git_commitdiff_plain,
 543         "commit" => \&git_commit,
 544         "forks" => \&git_forks,
 545         "heads" => \&git_heads,
 546         "history" => \&git_history,
 547         "log" => \&git_log,
 548         "rss" => \&git_rss,
 549         "atom" => \&git_atom,
 550         "search" => \&git_search,
 551         "search_help" => \&git_search_help,
 552         "shortlog" => \&git_shortlog,
 553         "summary" => \&git_summary,
 554         "tag" => \&git_tag,
 555         "tags" => \&git_tags,
 556         "tree" => \&git_tree,
 557         "snapshot" => \&git_snapshot,
 558         "object" => \&git_object,
 559         # those below don't need $project
 560         "opml" => \&git_opml,
 561         "project_list" => \&git_project_list,
 562         "project_index" => \&git_project_index,
 563 );
 564
 565 if (!defined $action) {
 566         if (defined $hash) {
 567                 $action = git_get_type($hash);
 568         } elsif (defined $hash_base && defined $file_name) {
 569                 $action = git_get_type("$hash_base:$file_name");
 570         } elsif (defined $project) {
 571                 $action = 'summary';
 572         } else {
 573                 $action = 'project_list';
 574         }
 575 }
 576 if (!defined($actions{$action})) {
 577         die_error(undef, "Unknown action");
 578 }
 579 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 580     !$project) {
 581         die_error(undef, "Project needed");
 582 }
 583 $actions{$action}->();
 584 exit;
 585
 586 ## ======================================================================
 587 ## action links
 588
 589 sub href(%) {
 590         my %params = @_;
 591         # default is to use -absolute url() i.e. $my_uri
 592         my $href = $params{-full} ? $my_url : $my_uri;
 593
 594         # XXX: Warning: If you touch this, check the search form for updating,
 595         # too.
 596
 597         my @mapping = (
 598                 project => "p",
 599                 action => "a",
 600                 file_name => "f",
 601                 file_parent => "fp",
 602                 hash => "h",
 603                 hash_parent => "hp",
 604                 hash_base => "hb",
 605                 hash_parent_base => "hpb",
 606                 page => "pg",
 607                 order => "o",
 608                 searchtext => "s",
 609                 searchtype => "st",
 610                 snapshot_format => "sf",
 611                 extra_options => "opt",
 612         );
 613         my %mapping = @mapping;
 614
 615         if ($params{-replay}) {
 616                 while (my ($name, $symbol) = each %mapping) {
 617                         if (!exists $params{$name}) {
 618                                 # to allow for multivalued params we use arrayref form
 619                                 $params{$name} = [ $cgi->param($symbol) ];
 620                         }
 621                 }
 622         }
 623
 624         $params{'project'} = $project unless exists $params{'project'};
 625
 626         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 627         if ($use_pathinfo) {
 628                 # use PATH_INFO for project name
 629                 $href .= "/$params{'project'}" if defined $params{'project'};
 630                 delete $params{'project'};
 631
 632                 # Summary just uses the project path URL
 633                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 634                         delete $params{'action'};
 635                 }
 636         }
 637
 638         # now encode the parameters explicitly
 639         my @result = ();
 640         for (my $i = 0; $i < @mapping; $i += 2) {
 641                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 642                 if (defined $params{$name}) {
 643                         if (ref($params{$name}) eq "ARRAY") {
 644                                 foreach my $par (@{$params{$name}}) {
 645                                         push @result, $symbol . "=" . esc_param($par);
 646                                 }
 647                         } else {
 648                                 push @result, $symbol . "=" . esc_param($params{$name});
 649                         }
 650                 }
 651         }
 652         $href .= "?" . join(';', @result) if scalar @result;
 653
 654         return $href;
 655 }
 656
 657
 658 ## ======================================================================
 659 ## validation, quoting/unquoting and escaping
 660
 661 sub validate_pathname {
 662         my $input = shift || return undef;
 663
 664         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 665         # at the beginning, at the end, and between slashes.
 666         # also this catches doubled slashes
 667         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 668                 return undef;
 669         }
 670         # no null characters
 671         if ($input =~ m!\0!) {
 672                 return undef;
 673         }
 674         return $input;
 675 }
 676
 677 sub validate_refname {
 678         my $input = shift || return undef;
 679
 680         # textual hashes are O.K.
 681         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 682                 return $input;
 683         }
 684         # it must be correct pathname
 685         $input = validate_pathname($input)
 686                 or return undef;
 687         # restrictions on ref name according to git-check-ref-format
 688         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 689                 return undef;
 690         }
 691         return $input;
 692 }
 693
 694 # decode sequences of octets in utf8 into Perl's internal form,
 695 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 696 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 697 sub to_utf8 {
 698         my $str = shift;
 699         if (utf8::valid($str)) {
 700                 utf8::decode($str);
 701                 return $str;
 702         } else {
 703                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 704         }
 705 }
 706
 707 # quote unsafe chars, but keep the slash, even when it's not
 708 # correct, but quoted slashes look too horrible in bookmarks
 709 sub esc_param {
 710         my $str = shift;
 711         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 712         $str =~ s/\+/%2B/g;
 713         $str =~ s/ /\+/g;
 714         return $str;
 715 }
 716
 717 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 718 sub esc_url {
 719         my $str = shift;
 720         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 721         $str =~ s/\+/%2B/g;
 722         $str =~ s/ /\+/g;
 723         return $str;
 724 }
 725
 726 # replace invalid utf8 character with SUBSTITUTION sequence
 727 sub esc_html ($;%) {
 728         my $str = shift;
 729         my %opts = @_;
 730
 731         $str = to_utf8($str);
 732         $str = $cgi->escapeHTML($str);
 733         if ($opts{'-nbsp'}) {
 734                 $str =~ s/ /&nbsp;/g;
 735         }
 736         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 737         return $str;
 738 }
 739
 740 # quote control characters and escape filename to HTML
 741 sub esc_path {
 742         my $str = shift;
 743         my %opts = @_;
 744
 745         $str = to_utf8($str);
 746         $str = $cgi->escapeHTML($str);
 747         if ($opts{'-nbsp'}) {
 748                 $str =~ s/ /&nbsp;/g;
 749         }
 750         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 751         return $str;
 752 }
 753
 754 # Make control characters "printable", using character escape codes (CEC)
 755 sub quot_cec {
 756         my $cntrl = shift;
 757         my %opts = @_;
 758         my %es = ( # character escape codes, aka escape sequences
 759                 "\t" => '\t',   # tab            (HT)
 760                 "\n" => '\n',   # line feed      (LF)
 761                 "\r" => '\r',   # carrige return (CR)
 762                 "\f" => '\f',   # form feed      (FF)
 763                 "\b" => '\b',   # backspace      (BS)
 764                 "\a" => '\a',   # alarm (bell)   (BEL)
 765                 "\e" => '\e',   # escape         (ESC)
 766                 "\013" => '\v', # vertical tab   (VT)
 767                 "\000" => '\0', # nul character  (NUL)
 768         );
 769         my $chr = ( (exists $es{$cntrl})
 770                     ? $es{$cntrl}
 771                     : sprintf('\%03o', ord($cntrl)) );
 772         if ($opts{-nohtml}) {
 773                 return $chr;
 774         } else {
 775                 return "<span class=\"cntrl\">$chr</span>";
 776         }
 777 }
 778
 779 # Alternatively use unicode control pictures codepoints,
 780 # Unicode "printable representation" (PR)
 781 sub quot_upr {
 782         my $cntrl = shift;
 783         my %opts = @_;
 784
 785         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 786         if ($opts{-nohtml}) {
 787                 return $chr;
 788         } else {
 789                 return "<span class=\"cntrl\">$chr</span>";
 790         }
 791 }
 792
 793 # git may return quoted and escaped filenames
 794 sub unquote {
 795         my $str = shift;
 796
 797         sub unq {
 798                 my $seq = shift;
 799                 my %es = ( # character escape codes, aka escape sequences
 800                         't' => "\t",   # tab            (HT, TAB)
 801                         'n' => "\n",   # newline        (NL)
 802                         'r' => "\r",   # return         (CR)
 803                         'f' => "\f",   # form feed      (FF)
 804                         'b' => "\b",   # backspace      (BS)
 805                         'a' => "\a",   # alarm (bell)   (BEL)
 806                         'e' => "\e",   # escape         (ESC)
 807                         'v' => "\013", # vertical tab   (VT)
 808                 );
 809
 810                 if ($seq =~ m/^[0-7]{1,3}$/) {
 811                         # octal char sequence
 812                         return chr(oct($seq));
 813                 } elsif (exists $es{$seq}) {
 814                         # C escape sequence, aka character escape code
 815                         return $es{$seq};
 816                 }
 817                 # quoted ordinary character
 818                 return $seq;
 819         }
 820
 821         if ($str =~ m/^"(.*)"$/) {
 822                 # needs unquoting
 823                 $str = $1;
 824                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 825         }
 826         return $str;
 827 }
 828
 829 # escape tabs (convert tabs to spaces)
 830 sub untabify {
 831         my $line = shift;
 832
 833         while ((my $pos = index($line, "\t")) != -1) {
 834                 if (my $count = (8 - ($pos % 8))) {
 835                         my $spaces = ' ' x $count;
 836                         $line =~ s/\t/$spaces/;
 837                 }
 838         }
 839
 840         return $line;
 841 }
 842
 843 sub project_in_list {
 844         my $project = shift;
 845         my @list = git_get_projects_list();
 846         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 847 }
 848
 849 ## ----------------------------------------------------------------------
 850 ## HTML aware string manipulation
 851
 852 sub chop_str {
 853         my $str = shift;
 854         my $len = shift;
 855         my $add_len = shift || 10;
 856
 857         # allow only $len chars, but don't cut a word if it would fit in $add_len
 858         # if it doesn't fit, cut it if it's still longer than the dots we would add
 859         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 860         my $body = $1;
 861         my $tail = $2;
 862         if (length($tail) > 4) {
 863                 $tail = " ...";
 864                 $body =~ s/&[^;]*$//; # remove chopped character entities
 865         }
 866         return "$body$tail";
 867 }
 868
 869 # takes the same arguments as chop_str, but also wraps a <span> around the
 870 # result with a title attribute if it does get chopped. Additionally, the
 871 # string is HTML-escaped.
 872 sub chop_and_escape_str {
 873         my $str = shift;
 874         my $len = shift;
 875         my $add_len = shift || 10;
 876
 877         my $chopped = chop_str($str, $len, $add_len);
 878         if ($chopped eq $str) {
 879                 return esc_html($chopped);
 880         } else {
 881                 $str =~ s/([[:cntrl:]])/?/g;
 882                 return $cgi->span({-title=>$str}, esc_html($chopped));
 883         }
 884 }
 885
 886 ## ----------------------------------------------------------------------
 887 ## functions returning short strings
 888
 889 # CSS class for given age value (in seconds)
 890 sub age_class {
 891         my $age = shift;
 892
 893         if (!defined $age) {
 894                 return "noage";
 895         } elsif ($age < 60*60*2) {
 896                 return "age0";
 897         } elsif ($age < 60*60*24*2) {
 898                 return "age1";
 899         } else {
 900                 return "age2";
 901         }
 902 }
 903
 904 # convert age in seconds to "nn units ago" string
 905 sub age_string {
 906         my $age = shift;
 907         my $age_str;
 908
 909         if ($age > 60*60*24*365*2) {
 910                 $age_str = (int $age/60/60/24/365);
 911                 $age_str .= " years ago";
 912         } elsif ($age > 60*60*24*(365/12)*2) {
 913                 $age_str = int $age/60/60/24/(365/12);
 914                 $age_str .= " months ago";
 915         } elsif ($age > 60*60*24*7*2) {
 916                 $age_str = int $age/60/60/24/7;
 917                 $age_str .= " weeks ago";
 918         } elsif ($age > 60*60*24*2) {
 919                 $age_str = int $age/60/60/24;
 920                 $age_str .= " days ago";
 921         } elsif ($age > 60*60*2) {
 922                 $age_str = int $age/60/60;
 923                 $age_str .= " hours ago";
 924         } elsif ($age > 60*2) {
 925                 $age_str = int $age/60;
 926                 $age_str .= " min ago";
 927         } elsif ($age > 2) {
 928                 $age_str = int $age;
 929                 $age_str .= " sec ago";
 930         } else {
 931                 $age_str .= " right now";
 932         }
 933         return $age_str;
 934 }
 935
 936 use constant {
 937         S_IFINVALID => 0030000,
 938         S_IFGITLINK => 0160000,
 939 };
 940
 941 # submodule/subproject, a commit object reference
 942 sub S_ISGITLINK($) {
 943         my $mode = shift;
 944
 945         return (($mode & S_IFMT) == S_IFGITLINK)
 946 }
 947
 948 # convert file mode in octal to symbolic file mode string
 949 sub mode_str {
 950         my $mode = oct shift;
 951
 952         if (S_ISGITLINK($mode)) {
 953                 return 'm---------';
 954         } elsif (S_ISDIR($mode & S_IFMT)) {
 955                 return 'drwxr-xr-x';
 956         } elsif (S_ISLNK($mode)) {
 957                 return 'lrwxrwxrwx';
 958         } elsif (S_ISREG($mode)) {
 959                 # git cares only about the executable bit
 960                 if ($mode & S_IXUSR) {
 961                         return '-rwxr-xr-x';
 962                 } else {
 963                         return '-rw-r--r--';
 964                 };
 965         } else {
 966                 return '----------';
 967         }
 968 }
 969
 970 # convert file mode in octal to file type string
 971 sub file_type {
 972         my $mode = shift;
 973
 974         if ($mode !~ m/^[0-7]+$/) {
 975                 return $mode;
 976         } else {
 977                 $mode = oct $mode;
 978         }
 979
 980         if (S_ISGITLINK($mode)) {
 981                 return "submodule";
 982         } elsif (S_ISDIR($mode & S_IFMT)) {
 983                 return "directory";
 984         } elsif (S_ISLNK($mode)) {
 985                 return "symlink";
 986         } elsif (S_ISREG($mode)) {
 987                 return "file";
 988         } else {
 989                 return "unknown";
 990         }
 991 }
 992
 993 # convert file mode in octal to file type description string
 994 sub file_type_long {
 995         my $mode = shift;
 996
 997         if ($mode !~ m/^[0-7]+$/) {
 998                 return $mode;
 999         } else {
1000                 $mode = oct $mode;
1001         }
1002
1003         if (S_ISGITLINK($mode)) {
1004                 return "submodule";
1005         } elsif (S_ISDIR($mode & S_IFMT)) {
1006                 return "directory";
1007         } elsif (S_ISLNK($mode)) {
1008                 return "symlink";
1009         } elsif (S_ISREG($mode)) {
1010                 if ($mode & S_IXUSR) {
1011                         return "executable";
1012                 } else {
1013                         return "file";
1014                 };
1015         } else {
1016                 return "unknown";
1017         }
1018 }
1019
1020
1021 ## ----------------------------------------------------------------------
1022 ## functions returning short HTML fragments, or transforming HTML fragments
1023 ## which don't belong to other sections
1024
1025 # format line of commit message.
1026 sub format_log_line_html {
1027         my $line = shift;
1028
1029         $line = esc_html($line, -nbsp=>1);
1030         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1031                 my $hash_text = $1;
1032                 my $link =
1033                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1034                                 -class => "text"}, $hash_text);
1035                 $line =~ s/$hash_text/$link/;
1036         }
1037         return $line;
1038 }
1039
1040 # format marker of refs pointing to given object
1041 sub format_ref_marker {
1042         my ($refs, $id) = @_;
1043         my $markers = '';
1044
1045         if (defined $refs->{$id}) {
1046                 foreach my $ref (@{$refs->{$id}}) {
1047                         my ($type, $name) = qw();
1048                         # e.g. tags/v2.6.11 or heads/next
1049                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1050                                 $type = $1;
1051                                 $name = $2;
1052                         } else {
1053                                 $type = "ref";
1054                                 $name = $ref;
1055                         }
1056
1057                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1058                                     esc_html($name) . "</span>";
1059                 }
1060         }
1061
1062         if ($markers) {
1063                 return ' <span class="refs">'. $markers . '</span>';
1064         } else {
1065                 return "";
1066         }
1067 }
1068
1069 # format, perhaps shortened and with markers, title line
1070 sub format_subject_html {
1071         my ($long, $short, $href, $extra) = @_;
1072         $extra = '' unless defined($extra);
1073
1074         if (length($short) < length($long)) {
1075                 return $cgi->a({-href => $href, -class => "list subject",
1076                                 -title => to_utf8($long)},
1077                        esc_html($short) . $extra);
1078         } else {
1079                 return $cgi->a({-href => $href, -class => "list subject"},
1080                        esc_html($long)  . $extra);
1081         }
1082 }
1083
1084 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1085 sub format_git_diff_header_line {
1086         my $line = shift;
1087         my $diffinfo = shift;
1088         my ($from, $to) = @_;
1089
1090         if ($diffinfo->{'nparents'}) {
1091                 # combined diff
1092                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1093                 if ($to->{'href'}) {
1094                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1095                                          esc_path($to->{'file'}));
1096                 } else { # file was deleted (no href)
1097                         $line .= esc_path($to->{'file'});
1098                 }
1099         } else {
1100                 # "ordinary" diff
1101                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1102                 if ($from->{'href'}) {
1103                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1104                                          'a/' . esc_path($from->{'file'}));
1105                 } else { # file was added (no href)
1106                         $line .= 'a/' . esc_path($from->{'file'});
1107                 }
1108                 $line .= ' ';
1109                 if ($to->{'href'}) {
1110                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1111                                          'b/' . esc_path($to->{'file'}));
1112                 } else { # file was deleted
1113                         $line .= 'b/' . esc_path($to->{'file'});
1114                 }
1115         }
1116
1117         return "<div class=\"diff header\">$line</div>\n";
1118 }
1119
1120 # format extended diff header line, before patch itself
1121 sub format_extended_diff_header_line {
1122         my $line = shift;
1123         my $diffinfo = shift;
1124         my ($from, $to) = @_;
1125
1126         # match <path>
1127         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1128                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1129                                        esc_path($from->{'file'}));
1130         }
1131         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1132                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1133                                  esc_path($to->{'file'}));
1134         }
1135         # match single <mode>
1136         if ($line =~ m/\s(\d{6})$/) {
1137                 $line .= '<span class="info"> (' .
1138                          file_type_long($1) .
1139                          ')</span>';
1140         }
1141         # match <hash>
1142         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1143                 # can match only for combined diff
1144                 $line = 'index ';
1145                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1146                         if ($from->{'href'}[$i]) {
1147                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1148                                                   -class=>"hash"},
1149                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1150                         } else {
1151                                 $line .= '0' x 7;
1152                         }
1153                         # separator
1154                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1155                 }
1156                 $line .= '..';
1157                 if ($to->{'href'}) {
1158                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1159                                          substr($diffinfo->{'to_id'},0,7));
1160                 } else {
1161                         $line .= '0' x 7;
1162                 }
1163
1164         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1165                 # can match only for ordinary diff
1166                 my ($from_link, $to_link);
1167                 if ($from->{'href'}) {
1168                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1169                                              substr($diffinfo->{'from_id'},0,7));
1170                 } else {
1171                         $from_link = '0' x 7;
1172                 }
1173                 if ($to->{'href'}) {
1174                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1175                                            substr($diffinfo->{'to_id'},0,7));
1176                 } else {
1177                         $to_link = '0' x 7;
1178                 }
1179                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1180                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1181         }
1182
1183         return $line . "<br/>\n";
1184 }
1185
1186 # format from-file/to-file diff header
1187 sub format_diff_from_to_header {
1188         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1189         my $line;
1190         my $result = '';
1191
1192         $line = $from_line;
1193         #assert($line =~ m/^---/) if DEBUG;
1194         # no extra formatting for "^--- /dev/null"
1195         if (! $diffinfo->{'nparents'}) {
1196                 # ordinary (single parent) diff
1197                 if ($line =~ m!^--- "?a/!) {
1198                         if ($from->{'href'}) {
1199                                 $line = '--- a/' .
1200                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1201                                                 esc_path($from->{'file'}));
1202                         } else {
1203                                 $line = '--- a/' .
1204                                         esc_path($from->{'file'});
1205                         }
1206                 }
1207                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1208
1209         } else {
1210                 # combined diff (merge commit)
1211                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1212                         if ($from->{'href'}[$i]) {
1213                                 $line = '--- ' .
1214                                         $cgi->a({-href=>href(action=>"blobdiff",
1215                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1216                                                              hash_parent_base=>$parents[$i],
1217                                                              file_parent=>$from->{'file'}[$i],
1218                                                              hash=>$diffinfo->{'to_id'},
1219                                                              hash_base=>$hash,
1220                                                              file_name=>$to->{'file'}),
1221                                                  -class=>"path",
1222                                                  -title=>"diff" . ($i+1)},
1223                                                 $i+1) .
1224                                         '/' .
1225                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1226                                                 esc_path($from->{'file'}[$i]));
1227                         } else {
1228                                 $line = '--- /dev/null';
1229                         }
1230                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1231                 }
1232         }
1233
1234         $line = $to_line;
1235         #assert($line =~ m/^\+\+\+/) if DEBUG;
1236         # no extra formatting for "^+++ /dev/null"
1237         if ($line =~ m!^\+\+\+ "?b/!) {
1238                 if ($to->{'href'}) {
1239                         $line = '+++ b/' .
1240                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1241                                         esc_path($to->{'file'}));
1242                 } else {
1243                         $line = '+++ b/' .
1244                                 esc_path($to->{'file'});
1245                 }
1246         }
1247         $result .= qq!<div class="diff to_file">$line</div>\n!;
1248
1249         return $result;
1250 }
1251
1252 # create note for patch simplified by combined diff
1253 sub format_diff_cc_simplified {
1254         my ($diffinfo, @parents) = @_;
1255         my $result = '';
1256
1257         $result .= "<div class=\"diff header\">" .
1258                    "diff --cc ";
1259         if (!is_deleted($diffinfo)) {
1260                 $result .= $cgi->a({-href => href(action=>"blob",
1261                                                   hash_base=>$hash,
1262                                                   hash=>$diffinfo->{'to_id'},
1263                                                   file_name=>$diffinfo->{'to_file'}),
1264                                     -class => "path"},
1265                                    esc_path($diffinfo->{'to_file'}));
1266         } else {
1267                 $result .= esc_path($diffinfo->{'to_file'});
1268         }
1269         $result .= "</div>\n" . # class="diff header"
1270                    "<div class=\"diff nodifferences\">" .
1271                    "Simple merge" .
1272                    "</div>\n"; # class="diff nodifferences"
1273
1274         return $result;
1275 }
1276
1277 # format patch (diff) line (not to be used for diff headers)
1278 sub format_diff_line {
1279         my $line = shift;
1280         my ($from, $to) = @_;
1281         my $diff_class = "";
1282
1283         chomp $line;
1284
1285         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1286                 # combined diff
1287                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1288                 if ($line =~ m/^\@{3}/) {
1289                         $diff_class = " chunk_header";
1290                 } elsif ($line =~ m/^\\/) {
1291                         $diff_class = " incomplete";
1292                 } elsif ($prefix =~ tr/+/+/) {
1293                         $diff_class = " add";
1294                 } elsif ($prefix =~ tr/-/-/) {
1295                         $diff_class = " rem";
1296                 }
1297         } else {
1298                 # assume ordinary diff
1299                 my $char = substr($line, 0, 1);
1300                 if ($char eq '+') {
1301                         $diff_class = " add";
1302                 } elsif ($char eq '-') {
1303                         $diff_class = " rem";
1304                 } elsif ($char eq '@') {
1305                         $diff_class = " chunk_header";
1306                 } elsif ($char eq "\\") {
1307                         $diff_class = " incomplete";
1308                 }
1309         }
1310         $line = untabify($line);
1311         if ($from && $to && $line =~ m/^\@{2} /) {
1312                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1313                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1314
1315                 $from_lines = 0 unless defined $from_lines;
1316                 $to_lines   = 0 unless defined $to_lines;
1317
1318                 if ($from->{'href'}) {
1319                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1320                                              -class=>"list"}, $from_text);
1321                 }
1322                 if ($to->{'href'}) {
1323                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1324                                              -class=>"list"}, $to_text);
1325                 }
1326                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1327                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1328                 return "<div class=\"diff$diff_class\">$line</div>\n";
1329         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1330                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1331                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1332
1333                 @from_text = split(' ', $ranges);
1334                 for (my $i = 0; $i < @from_text; ++$i) {
1335                         ($from_start[$i], $from_nlines[$i]) =
1336                                 (split(',', substr($from_text[$i], 1)), 0);
1337                 }
1338
1339                 $to_text   = pop @from_text;
1340                 $to_start  = pop @from_start;
1341                 $to_nlines = pop @from_nlines;
1342
1343                 $line = "<span class=\"chunk_info\">$prefix ";
1344                 for (my $i = 0; $i < @from_text; ++$i) {
1345                         if ($from->{'href'}[$i]) {
1346                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1347                                                   -class=>"list"}, $from_text[$i]);
1348                         } else {
1349                                 $line .= $from_text[$i];
1350                         }
1351                         $line .= " ";
1352                 }
1353                 if ($to->{'href'}) {
1354                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1355                                           -class=>"list"}, $to_text);
1356                 } else {
1357                         $line .= $to_text;
1358                 }
1359                 $line .= " $prefix</span>" .
1360                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1361                 return "<div class=\"diff$diff_class\">$line</div>\n";
1362         }
1363         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1364 }
1365
1366 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1367 # linked.  Pass the hash of the tree/commit to snapshot.
1368 sub format_snapshot_links {
1369         my ($hash) = @_;
1370         my @snapshot_fmts = gitweb_check_feature('snapshot');
1371         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1372         my $num_fmts = @snapshot_fmts;
1373         if ($num_fmts > 1) {
1374                 # A parenthesized list of links bearing format names.
1375                 # e.g. "snapshot (_tar.gz_ _zip_)"
1376                 return "snapshot (" . join(' ', map
1377                         $cgi->a({
1378                                 -href => href(
1379                                         action=>"snapshot",
1380                                         hash=>$hash,
1381                                         snapshot_format=>$_
1382                                 )
1383                         }, $known_snapshot_formats{$_}{'display'})
1384                 , @snapshot_fmts) . ")";
1385         } elsif ($num_fmts == 1) {
1386                 # A single "snapshot" link whose tooltip bears the format name.
1387                 # i.e. "_snapshot_"
1388                 my ($fmt) = @snapshot_fmts;
1389                 return
1390                         $cgi->a({
1391                                 -href => href(
1392                                         action=>"snapshot",
1393                                         hash=>$hash,
1394                                         snapshot_format=>$fmt
1395                                 ),
1396                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1397                         }, "snapshot");
1398         } else { # $num_fmts == 0
1399                 return undef;
1400         }
1401 }
1402
1403 ## ----------------------------------------------------------------------
1404 ## git utility subroutines, invoking git commands
1405
1406 # returns path to the core git executable and the --git-dir parameter as list
1407 sub git_cmd {
1408         return $GIT, '--git-dir='.$git_dir;
1409 }
1410
1411 # returns path to the core git executable and the --git-dir parameter as string
1412 sub git_cmd_str {
1413         return join(' ', git_cmd());
1414 }
1415
1416 # get HEAD ref of given project as hash
1417 sub git_get_head_hash {
1418         my $project = shift;
1419         my $o_git_dir = $git_dir;
1420         my $retval = undef;
1421         $git_dir = "$projectroot/$project";
1422         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1423                 my $head = <$fd>;
1424                 close $fd;
1425                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1426                         $retval = $1;
1427                 }
1428         }
1429         if (defined $o_git_dir) {
1430                 $git_dir = $o_git_dir;
1431         }
1432         return $retval;
1433 }
1434
1435 # get type of given object
1436 sub git_get_type {
1437         my $hash = shift;
1438
1439         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1440         my $type = <$fd>;
1441         close $fd or return;
1442         chomp $type;
1443         return $type;
1444 }
1445
1446 # repository configuration
1447 our $config_file = '';
1448 our %config;
1449
1450 # store multiple values for single key as anonymous array reference
1451 # single values stored directly in the hash, not as [ <value> ]
1452 sub hash_set_multi {
1453         my ($hash, $key, $value) = @_;
1454
1455         if (!exists $hash->{$key}) {
1456                 $hash->{$key} = $value;
1457         } elsif (!ref $hash->{$key}) {
1458                 $hash->{$key} = [ $hash->{$key}, $value ];
1459         } else {
1460                 push @{$hash->{$key}}, $value;
1461         }
1462 }
1463
1464 # return hash of git project configuration
1465 # optionally limited to some section, e.g. 'gitweb'
1466 sub git_parse_project_config {
1467         my $section_regexp = shift;
1468         my %config;
1469
1470         local $/ = "\0";
1471
1472         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1473                 or return;
1474
1475         while (my $keyval = <$fh>) {
1476                 chomp $keyval;
1477                 my ($key, $value) = split(/\n/, $keyval, 2);
1478
1479                 hash_set_multi(\%config, $key, $value)
1480                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1481         }
1482         close $fh;
1483
1484         return %config;
1485 }
1486
1487 # convert config value to boolean, 'true' or 'false'
1488 # no value, number > 0, 'true' and 'yes' values are true
1489 # rest of values are treated as false (never as error)
1490 sub config_to_bool {
1491         my $val = shift;
1492
1493         # strip leading and trailing whitespace
1494         $val =~ s/^\s+//;
1495         $val =~ s/\s+$//;
1496
1497         return (!defined $val ||               # section.key
1498                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1499                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1500 }
1501
1502 # convert config value to simple decimal number
1503 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1504 # to be multiplied by 1024, 1048576, or 1073741824
1505 sub config_to_int {
1506         my $val = shift;
1507
1508         # strip leading and trailing whitespace
1509         $val =~ s/^\s+//;
1510         $val =~ s/\s+$//;
1511
1512         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1513                 $unit = lc($unit);
1514                 # unknown unit is treated as 1
1515                 return $num * ($unit eq 'g' ? 1073741824 :
1516                                $unit eq 'm' ?    1048576 :
1517                                $unit eq 'k' ?       1024 : 1);
1518         }
1519         return $val;
1520 }
1521
1522 # convert config value to array reference, if needed
1523 sub config_to_multi {
1524         my $val = shift;
1525
1526         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1527 }
1528
1529 sub git_get_project_config {
1530         my ($key, $type) = @_;
1531
1532         # key sanity check
1533         return unless ($key);
1534         $key =~ s/^gitweb\.//;
1535         return if ($key =~ m/\W/);
1536
1537         # type sanity check
1538         if (defined $type) {
1539                 $type =~ s/^--//;
1540                 $type = undef
1541                         unless ($type eq 'bool' || $type eq 'int');
1542         }
1543
1544         # get config
1545         if (!defined $config_file ||
1546             $config_file ne "$git_dir/config") {
1547                 %config = git_parse_project_config('gitweb');
1548                 $config_file = "$git_dir/config";
1549         }
1550
1551         # ensure given type
1552         if (!defined $type) {
1553                 return $config{"gitweb.$key"};
1554         } elsif ($type eq 'bool') {
1555                 # backward compatibility: 'git config --bool' returns true/false
1556                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1557         } elsif ($type eq 'int') {
1558                 return config_to_int($config{"gitweb.$key"});
1559         }
1560         return $config{"gitweb.$key"};
1561 }
1562
1563 # get hash of given path at given ref
1564 sub git_get_hash_by_path {
1565         my $base = shift;
1566         my $path = shift || return undef;
1567         my $type = shift;
1568
1569         $path =~ s,/+$,,;
1570
1571         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1572                 or die_error(undef, "Open git-ls-tree failed");
1573         my $line = <$fd>;
1574         close $fd or return undef;
1575
1576         if (!defined $line) {
1577                 # there is no tree or hash given by $path at $base
1578                 return undef;
1579         }
1580
1581         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1582         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1583         if (defined $type && $type ne $2) {
1584                 # type doesn't match
1585                 return undef;
1586         }
1587         return $3;
1588 }
1589
1590 # get path of entry with given hash at given tree-ish (ref)
1591 # used to get 'from' filename for combined diff (merge commit) for renames
1592 sub git_get_path_by_hash {
1593         my $base = shift || return;
1594         my $hash = shift || return;
1595
1596         local $/ = "\0";
1597
1598         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1599                 or return undef;
1600         while (my $line = <$fd>) {
1601                 chomp $line;
1602
1603                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1604                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1605                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1606                         close $fd;
1607                         return $1;
1608                 }
1609         }
1610         close $fd;
1611         return undef;
1612 }
1613
1614 ## ......................................................................
1615 ## git utility functions, directly accessing git repository
1616
1617 sub git_get_project_description {
1618         my $path = shift;
1619
1620         $git_dir = "$projectroot/$path";
1621         open my $fd, "$git_dir/description"
1622                 or return git_get_project_config('description');
1623         my $descr = <$fd>;
1624         close $fd;
1625         if (defined $descr) {
1626                 chomp $descr;
1627         }
1628         return $descr;
1629 }
1630
1631 sub git_get_project_url_list {
1632         my $path = shift;
1633
1634         $git_dir = "$projectroot/$path";
1635         open my $fd, "$git_dir/cloneurl"
1636                 or return wantarray ?
1637                 @{ config_to_multi(git_get_project_config('url')) } :
1638                    config_to_multi(git_get_project_config('url'));
1639         my @git_project_url_list = map { chomp; $_ } <$fd>;
1640         close $fd;
1641
1642         return wantarray ? @git_project_url_list : \@git_project_url_list;
1643 }
1644
1645 sub git_get_projects_list {
1646         my ($filter) = @_;
1647         my @list;
1648
1649         $filter ||= '';
1650         $filter =~ s/\.git$//;
1651
1652         my ($check_forks) = gitweb_check_feature('forks');
1653
1654         if (-d $projects_list) {
1655                 # search in directory
1656                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1657                 # remove the trailing "/"
1658                 $dir =~ s!/+$!!;
1659                 my $pfxlen = length("$dir");
1660                 my $pfxdepth = ($dir =~ tr!/!!);
1661
1662                 File::Find::find({
1663                         follow_fast => 1, # follow symbolic links
1664                         follow_skip => 2, # ignore duplicates
1665                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1666                         wanted => sub {
1667                                 # skip project-list toplevel, if we get it.
1668                                 return if (m!^[/.]$!);
1669                                 # only directories can be git repositories
1670                                 return unless (-d $_);
1671                                 # don't traverse too deep (Find is super slow on os x)
1672                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1673                                         $File::Find::prune = 1;
1674                                         return;
1675                                 }
1676
1677                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1678                                 # we check related file in $projectroot
1679                                 if ($check_forks and $subdir =~ m#/.#) {
1680                                         $File::Find::prune = 1;
1681                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1682                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1683                                         $File::Find::prune = 1;
1684                                 }
1685                         },
1686                 }, "$dir");
1687
1688         } elsif (-f $projects_list) {
1689                 # read from file(url-encoded):
1690                 # 'git%2Fgit.git Linus+Torvalds'
1691                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1692                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1693                 my %paths;
1694                 open my ($fd), $projects_list or return;
1695         PROJECT:
1696                 while (my $line = <$fd>) {
1697                         chomp $line;
1698                         my ($path, $owner) = split ' ', $line;
1699                         $path = unescape($path);
1700                         $owner = unescape($owner);
1701                         if (!defined $path) {
1702                                 next;
1703                         }
1704                         if ($filter ne '') {
1705                                 # looking for forks;
1706                                 my $pfx = substr($path, 0, length($filter));
1707                                 if ($pfx ne $filter) {
1708                                         next PROJECT;
1709                                 }
1710                                 my $sfx = substr($path, length($filter));
1711                                 if ($sfx !~ /^\/.*\.git$/) {
1712                                         next PROJECT;
1713                                 }
1714                         } elsif ($check_forks) {
1715                         PATH:
1716                                 foreach my $filter (keys %paths) {
1717                                         # looking for forks;
1718                                         my $pfx = substr($path, 0, length($filter));
1719                                         if ($pfx ne $filter) {
1720                                                 next PATH;
1721                                         }
1722                                         my $sfx = substr($path, length($filter));
1723                                         if ($sfx !~ /^\/.*\.git$/) {
1724                                                 next PATH;
1725                                         }
1726                                         # is a fork, don't include it in
1727                                         # the list
1728                                         next PROJECT;
1729                                 }
1730                         }
1731                         if (check_export_ok("$projectroot/$path")) {
1732                                 my $pr = {
1733                                         path => $path,
1734                                         owner => to_utf8($owner),
1735                                 };
1736                                 push @list, $pr;
1737                                 (my $forks_path = $path) =~ s/\.git$//;
1738                                 $paths{$forks_path}++;
1739                         }
1740                 }
1741                 close $fd;
1742         }
1743         return @list;
1744 }
1745
1746 our $gitweb_project_owner = undef;
1747 sub git_get_project_list_from_file {
1748
1749         return if (defined $gitweb_project_owner);
1750
1751         $gitweb_project_owner = {};
1752         # read from file (url-encoded):
1753         # 'git%2Fgit.git Linus+Torvalds'
1754         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1755         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1756         if (-f $projects_list) {
1757                 open (my $fd , $projects_list);
1758                 while (my $line = <$fd>) {
1759                         chomp $line;
1760                         my ($pr, $ow) = split ' ', $line;
1761                         $pr = unescape($pr);
1762                         $ow = unescape($ow);
1763                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1764                 }
1765                 close $fd;
1766         }
1767 }
1768
1769 sub git_get_project_owner {
1770         my $project = shift;
1771         my $owner;
1772
1773         return undef unless $project;
1774         $git_dir = "$projectroot/$project";
1775
1776         if (!defined $gitweb_project_owner) {
1777                 git_get_project_list_from_file();
1778         }
1779
1780         if (exists $gitweb_project_owner->{$project}) {
1781                 $owner = $gitweb_project_owner->{$project};
1782         }
1783         if (!defined $owner){
1784                 $owner = git_get_project_config('owner');
1785         }
1786         if (!defined $owner) {
1787                 $owner = get_file_owner("$git_dir");
1788         }
1789
1790         return $owner;
1791 }
1792
1793 sub git_get_last_activity {
1794         my ($path) = @_;
1795         my $fd;
1796
1797         $git_dir = "$projectroot/$path";
1798         open($fd, "-|", git_cmd(), 'for-each-ref',
1799              '--format=%(committer)',
1800              '--sort=-committerdate',
1801              '--count=1',
1802              'refs/heads') or return;
1803         my $most_recent = <$fd>;
1804         close $fd or return;
1805         if (defined $most_recent &&
1806             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1807                 my $timestamp = $1;
1808                 my $age = time - $timestamp;
1809                 return ($age, age_string($age));
1810         }
1811         return (undef, undef);
1812 }
1813
1814 sub git_get_references {
1815         my $type = shift || "";
1816         my %refs;
1817         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1818         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1819         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1820                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1821                 or return;
1822
1823         while (my $line = <$fd>) {
1824                 chomp $line;
1825                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1826                         if (defined $refs{$1}) {
1827                                 push @{$refs{$1}}, $2;
1828                         } else {
1829                                 $refs{$1} = [ $2 ];
1830                         }
1831                 }
1832         }
1833         close $fd or return;
1834         return \%refs;
1835 }
1836
1837 sub git_get_rev_name_tags {
1838         my $hash = shift || return undef;
1839
1840         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1841                 or return;
1842         my $name_rev = <$fd>;
1843         close $fd;
1844
1845         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1846                 return $1;
1847         } else {
1848                 # catches also '$hash undefined' output
1849                 return undef;
1850         }
1851 }
1852
1853 ## ----------------------------------------------------------------------
1854 ## parse to hash functions
1855
1856 sub parse_date {
1857         my $epoch = shift;
1858         my $tz = shift || "-0000";
1859
1860         my %date;
1861         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1862         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1863         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1864         $date{'hour'} = $hour;
1865         $date{'minute'} = $min;
1866         $date{'mday'} = $mday;
1867         $date{'day'} = $days[$wday];
1868         $date{'month'} = $months[$mon];
1869         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1870                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1871         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1872                              $mday, $months[$mon], $hour ,$min;
1873         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1874                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1875
1876         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1877         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1878         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1879         $date{'hour_local'} = $hour;
1880         $date{'minute_local'} = $min;
1881         $date{'tz_local'} = $tz;
1882         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1883                                   1900+$year, $mon+1, $mday,
1884                                   $hour, $min, $sec, $tz);
1885         return %date;
1886 }
1887
1888 sub parse_tag {
1889         my $tag_id = shift;
1890         my %tag;
1891         my @comment;
1892
1893         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1894         $tag{'id'} = $tag_id;
1895         while (my $line = <$fd>) {
1896                 chomp $line;
1897                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1898                         $tag{'object'} = $1;
1899                 } elsif ($line =~ m/^type (.+)$/) {
1900                         $tag{'type'} = $1;
1901                 } elsif ($line =~ m/^tag (.+)$/) {
1902                         $tag{'name'} = $1;
1903                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1904                         $tag{'author'} = $1;
1905                         $tag{'epoch'} = $2;
1906                         $tag{'tz'} = $3;
1907                 } elsif ($line =~ m/--BEGIN/) {
1908                         push @comment, $line;
1909                         last;
1910                 } elsif ($line eq "") {
1911                         last;
1912                 }
1913         }
1914         push @comment, <$fd>;
1915         $tag{'comment'} = \@comment;
1916         close $fd or return;
1917         if (!defined $tag{'name'}) {
1918                 return
1919         };
1920         return %tag
1921 }
1922
1923 sub parse_commit_text {
1924         my ($commit_text, $withparents) = @_;
1925         my @commit_lines = split '\n', $commit_text;
1926         my %co;
1927
1928         pop @commit_lines; # Remove '\0'
1929
1930         if (! @commit_lines) {
1931                 return;
1932         }
1933
1934         my $header = shift @commit_lines;
1935         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1936                 return;
1937         }
1938         ($co{'id'}, my @parents) = split ' ', $header;
1939         while (my $line = shift @commit_lines) {
1940                 last if $line eq "\n";
1941                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1942                         $co{'tree'} = $1;
1943                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1944                         push @parents, $1;
1945                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1946                         $co{'author'} = $1;
1947                         $co{'author_epoch'} = $2;
1948                         $co{'author_tz'} = $3;
1949                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1950                                 $co{'author_name'}  = $1;
1951                                 $co{'author_email'} = $2;
1952                         } else {
1953                                 $co{'author_name'} = $co{'author'};
1954                         }
1955                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1956                         $co{'committer'} = $1;
1957                         $co{'committer_epoch'} = $2;
1958                         $co{'committer_tz'} = $3;
1959                         $co{'committer_name'} = $co{'committer'};
1960                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1961                                 $co{'committer_name'}  = $1;
1962                                 $co{'committer_email'} = $2;
1963                         } else {
1964                                 $co{'committer_name'} = $co{'committer'};
1965                         }
1966                 }
1967         }
1968         if (!defined $co{'tree'}) {
1969                 return;
1970         };
1971         $co{'parents'} = \@parents;
1972         $co{'parent'} = $parents[0];
1973
1974         foreach my $title (@commit_lines) {
1975                 $title =~ s/^    //;
1976                 if ($title ne "") {
1977                         $co{'title'} = chop_str($title, 80, 5);
1978                         # remove leading stuff of merges to make the interesting part visible
1979                         if (length($title) > 50) {
1980                                 $title =~ s/^Automatic //;
1981                                 $title =~ s/^merge (of|with) /Merge ... /i;
1982                                 if (length($title) > 50) {
1983                                         $title =~ s/(http|rsync):\/\///;
1984                                 }
1985                                 if (length($title) > 50) {
1986                                         $title =~ s/(master|www|rsync)\.//;
1987                                 }
1988                                 if (length($title) > 50) {
1989                                         $title =~ s/kernel.org:?//;
1990                                 }
1991                                 if (length($title) > 50) {
1992                                         $title =~ s/\/pub\/scm//;
1993                                 }
1994                         }
1995                         $co{'title_short'} = chop_str($title, 50, 5);
1996                         last;
1997                 }
1998         }
1999         if ($co{'title'} eq "") {
2000                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2001         }
2002         # remove added spaces
2003         foreach my $line (@commit_lines) {
2004                 $line =~ s/^    //;
2005         }
2006         $co{'comment'} = \@commit_lines;
2007
2008         my $age = time - $co{'committer_epoch'};
2009         $co{'age'} = $age;
2010         $co{'age_string'} = age_string($age);
2011         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2012         if ($age > 60*60*24*7*2) {
2013                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2014                 $co{'age_string_age'} = $co{'age_string'};
2015         } else {
2016                 $co{'age_string_date'} = $co{'age_string'};
2017                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2018         }
2019         return %co;
2020 }
2021
2022 sub parse_commit {
2023         my ($commit_id) = @_;
2024         my %co;
2025
2026         local $/ = "\0";
2027
2028         open my $fd, "-|", git_cmd(), "rev-list",
2029                 "--parents",
2030                 "--header",
2031                 "--max-count=1",
2032                 $commit_id,
2033                 "--",
2034                 or die_error(undef, "Open git-rev-list failed");
2035         %co = parse_commit_text(<$fd>, 1);
2036         close $fd;
2037
2038         return %co;
2039 }
2040
2041 sub parse_commits {
2042         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2043         my @cos;
2044
2045         $maxcount ||= 1;
2046         $skip ||= 0;
2047
2048         local $/ = "\0";
2049
2050         open my $fd, "-|", git_cmd(), "rev-list",
2051                 "--header",
2052                 ($arg ? ($arg) : ()),
2053                 ("--max-count=" . $maxcount),
2054                 ("--skip=" . $skip),
2055                 @extra_options,
2056                 $commit_id,
2057                 "--",
2058                 ($filename ? ($filename) : ())
2059                 or die_error(undef, "Open git-rev-list failed");
2060         while (my $line = <$fd>) {
2061                 my %co = parse_commit_text($line);
2062                 push @cos, \%co;
2063         }
2064         close $fd;
2065
2066         return wantarray ? @cos : \@cos;
2067 }
2068
2069 # parse ref from ref_file, given by ref_id, with given type
2070 sub parse_ref {
2071         my $ref_file = shift;
2072         my $ref_id = shift;
2073         my $type = shift || git_get_type($ref_id);
2074         my %ref_item;
2075
2076         $ref_item{'type'} = $type;
2077         $ref_item{'id'} = $ref_id;
2078         $ref_item{'epoch'} = 0;
2079         $ref_item{'age'} = "unknown";
2080         if ($type eq "tag") {
2081                 my %tag = parse_tag($ref_id);
2082                 $ref_item{'comment'} = $tag{'comment'};
2083                 if ($tag{'type'} eq "commit") {
2084                         my %co = parse_commit($tag{'object'});
2085                         $ref_item{'epoch'} = $co{'committer_epoch'};
2086                         $ref_item{'age'} = $co{'age_string'};
2087                 } elsif (defined($tag{'epoch'})) {
2088                         my $age = time - $tag{'epoch'};
2089                         $ref_item{'epoch'} = $tag{'epoch'};
2090                         $ref_item{'age'} = age_string($age);
2091                 }
2092                 $ref_item{'reftype'} = $tag{'type'};
2093                 $ref_item{'name'} = $tag{'name'};
2094                 $ref_item{'refid'} = $tag{'object'};
2095         } elsif ($type eq "commit"){
2096                 my %co = parse_commit($ref_id);
2097                 $ref_item{'reftype'} = "commit";
2098                 $ref_item{'name'} = $ref_file;
2099                 $ref_item{'title'} = $co{'title'};
2100                 $ref_item{'refid'} = $ref_id;
2101                 $ref_item{'epoch'} = $co{'committer_epoch'};
2102                 $ref_item{'age'} = $co{'age_string'};
2103         } else {
2104                 $ref_item{'reftype'} = $type;
2105                 $ref_item{'name'} = $ref_file;
2106                 $ref_item{'refid'} = $ref_id;
2107         }
2108
2109         return %ref_item;
2110 }
2111
2112 # parse line of git-diff-tree "raw" output
2113 sub parse_difftree_raw_line {
2114         my $line = shift;
2115         my %res;
2116
2117         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2118         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2119         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2120                 $res{'from_mode'} = $1;
2121                 $res{'to_mode'} = $2;
2122                 $res{'from_id'} = $3;
2123                 $res{'to_id'} = $4;
2124                 $res{'status'} = $res{'status_str'} = $5;
2125                 $res{'similarity'} = $6;
2126                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2127                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2128                 } else {
2129                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2130                 }
2131         }
2132         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2133         # combined diff (for merge commit)
2134         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2135                 $res{'nparents'}  = length($1);
2136                 $res{'from_mode'} = [ split(' ', $2) ];
2137                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2138                 $res{'from_id'} = [ split(' ', $3) ];
2139                 $res{'to_id'} = pop @{$res{'from_id'}};
2140                 $res{'status_str'} = $4;
2141                 $res{'status'} = [ split('', $4) ];
2142                 $res{'to_file'} = unquote($5);
2143         }
2144         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2145         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2146                 $res{'commit'} = $1;
2147         }
2148
2149         return wantarray ? %res : \%res;
2150 }
2151
2152 # wrapper: return parsed line of git-diff-tree "raw" output
2153 # (the argument might be raw line, or parsed info)
2154 sub parsed_difftree_line {
2155         my $line_or_ref = shift;
2156
2157         if (ref($line_or_ref) eq "HASH") {
2158                 # pre-parsed (or generated by hand)
2159                 return $line_or_ref;
2160         } else {
2161                 return parse_difftree_raw_line($line_or_ref);
2162         }
2163 }
2164
2165 # parse line of git-ls-tree output
2166 sub parse_ls_tree_line ($;%) {
2167         my $line = shift;
2168         my %opts = @_;
2169         my %res;
2170
2171         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2172         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2173
2174         $res{'mode'} = $1;
2175         $res{'type'} = $2;
2176         $res{'hash'} = $3;
2177         if ($opts{'-z'}) {
2178                 $res{'name'} = $4;
2179         } else {
2180                 $res{'name'} = unquote($4);
2181         }
2182
2183         return wantarray ? %res : \%res;
2184 }
2185
2186 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2187 sub parse_from_to_diffinfo {
2188         my ($diffinfo, $from, $to, @parents) = @_;
2189
2190         if ($diffinfo->{'nparents'}) {
2191                 # combined diff
2192                 $from->{'file'} = [];
2193                 $from->{'href'} = [];
2194                 fill_from_file_info($diffinfo, @parents)
2195                         unless exists $diffinfo->{'from_file'};
2196                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2197                         $from->{'file'}[$i] =
2198                                 defined $diffinfo->{'from_file'}[$i] ?
2199                                         $diffinfo->{'from_file'}[$i] :
2200                                         $diffinfo->{'to_file'};
2201                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2202                                 $from->{'href'}[$i] = href(action=>"blob",
2203                                                            hash_base=>$parents[$i],
2204                                                            hash=>$diffinfo->{'from_id'}[$i],
2205                                                            file_name=>$from->{'file'}[$i]);
2206                         } else {
2207                                 $from->{'href'}[$i] = undef;
2208                         }
2209                 }
2210         } else {
2211                 # ordinary (not combined) diff
2212                 $from->{'file'} = $diffinfo->{'from_file'};
2213                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2214                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2215                                                hash=>$diffinfo->{'from_id'},
2216                                                file_name=>$from->{'file'});
2217                 } else {
2218                         delete $from->{'href'};
2219                 }
2220         }
2221
2222         $to->{'file'} = $diffinfo->{'to_file'};
2223         if (!is_deleted($diffinfo)) { # file exists in result
2224                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2225                                      hash=>$diffinfo->{'to_id'},
2226                                      file_name=>$to->{'file'});
2227         } else {
2228                 delete $to->{'href'};
2229         }
2230 }
2231
2232 ## ......................................................................
2233 ## parse to array of hashes functions
2234
2235 sub git_get_heads_list {
2236         my $limit = shift;
2237         my @headslist;
2238
2239         open my $fd, '-|', git_cmd(), 'for-each-ref',
2240                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2241                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2242                 'refs/heads'
2243                 or return;
2244         while (my $line = <$fd>) {
2245                 my %ref_item;
2246
2247                 chomp $line;
2248                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2249                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2250                 my ($committer, $epoch, $tz) =
2251                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2252                 $ref_item{'fullname'}  = $name;
2253                 $name =~ s!^refs/heads/!!;
2254
2255                 $ref_item{'name'}  = $name;
2256                 $ref_item{'id'}    = $hash;
2257                 $ref_item{'title'} = $title || '(no commit message)';
2258                 $ref_item{'epoch'} = $epoch;
2259                 if ($epoch) {
2260                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2261                 } else {
2262                         $ref_item{'age'} = "unknown";
2263                 }
2264
2265                 push @headslist, \%ref_item;
2266         }
2267         close $fd;
2268
2269         return wantarray ? @headslist : \@headslist;
2270 }
2271
2272 sub git_get_tags_list {
2273         my $limit = shift;
2274         my @tagslist;
2275
2276         open my $fd, '-|', git_cmd(), 'for-each-ref',
2277                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2278                 '--format=%(objectname) %(objecttype) %(refname) '.
2279                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2280                 'refs/tags'
2281                 or return;
2282         while (my $line = <$fd>) {
2283                 my %ref_item;
2284
2285                 chomp $line;
2286                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2287                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2288                 my ($creator, $epoch, $tz) =
2289                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2290                 $ref_item{'fullname'} = $name;
2291                 $name =~ s!^refs/tags/!!;
2292
2293                 $ref_item{'type'} = $type;
2294                 $ref_item{'id'} = $id;
2295                 $ref_item{'name'} = $name;
2296                 if ($type eq "tag") {
2297                         $ref_item{'subject'} = $title;
2298                         $ref_item{'reftype'} = $reftype;
2299                         $ref_item{'refid'}   = $refid;
2300                 } else {
2301                         $ref_item{'reftype'} = $type;
2302                         $ref_item{'refid'}   = $id;
2303                 }
2304
2305                 if ($type eq "tag" || $type eq "commit") {
2306                         $ref_item{'epoch'} = $epoch;
2307                         if ($epoch) {
2308                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2309                         } else {
2310                                 $ref_item{'age'} = "unknown";
2311                         }
2312                 }
2313
2314                 push @tagslist, \%ref_item;
2315         }
2316         close $fd;
2317
2318         return wantarray ? @tagslist : \@tagslist;
2319 }
2320
2321 ## ----------------------------------------------------------------------
2322 ## filesystem-related functions
2323
2324 sub get_file_owner {
2325         my $path = shift;
2326
2327         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2328         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2329         if (!defined $gcos) {
2330                 return undef;
2331         }
2332         my $owner = $gcos;
2333         $owner =~ s/[,;].*$//;
2334         return to_utf8($owner);
2335 }
2336
2337 ## ......................................................................
2338 ## mimetype related functions
2339
2340 sub mimetype_guess_file {
2341         my $filename = shift;
2342         my $mimemap = shift;
2343         -r $mimemap or return undef;
2344
2345         my %mimemap;
2346         open(MIME, $mimemap) or return undef;
2347         while (<MIME>) {
2348                 next if m/^#/; # skip comments
2349                 my ($mime, $exts) = split(/\t+/);
2350                 if (defined $exts) {
2351                         my @exts = split(/\s+/, $exts);
2352                         foreach my $ext (@exts) {
2353                                 $mimemap{$ext} = $mime;
2354                         }
2355                 }
2356         }
2357         close(MIME);
2358
2359         $filename =~ /\.([^.]*)$/;
2360         return $mimemap{$1};
2361 }
2362
2363 sub mimetype_guess {
2364         my $filename = shift;
2365         my $mime;
2366         $filename =~ /\./ or return undef;
2367
2368         if ($mimetypes_file) {
2369                 my $file = $mimetypes_file;
2370                 if ($file !~ m!^/!) { # if it is relative path
2371                         # it is relative to project
2372                         $file = "$projectroot/$project/$file";
2373                 }
2374                 $mime = mimetype_guess_file($filename, $file);
2375         }
2376         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2377         return $mime;
2378 }
2379
2380 sub blob_mimetype {
2381         my $fd = shift;
2382         my $filename = shift;
2383
2384         if ($filename) {
2385                 my $mime = mimetype_guess($filename);
2386                 $mime and return $mime;
2387         }
2388
2389         # just in case
2390         return $default_blob_plain_mimetype unless $fd;
2391
2392         if (-T $fd) {
2393                 return 'text/plain' .
2394                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2395         } elsif (! $filename) {
2396                 return 'application/octet-stream';
2397         } elsif ($filename =~ m/\.png$/i) {
2398                 return 'image/png';
2399         } elsif ($filename =~ m/\.gif$/i) {
2400                 return 'image/gif';
2401         } elsif ($filename =~ m/\.jpe?g$/i) {
2402                 return 'image/jpeg';
2403         } else {
2404                 return 'application/octet-stream';
2405         }
2406 }
2407
2408 ## ======================================================================
2409 ## functions printing HTML: header, footer, error page
2410
2411 sub git_header_html {
2412         my $status = shift || "200 OK";
2413         my $expires = shift;
2414
2415         my $title = "$site_name";
2416         if (defined $project) {
2417                 $title .= " - " . to_utf8($project);
2418                 if (defined $action) {
2419                         $title .= "/$action";
2420                         if (defined $file_name) {
2421                                 $title .= " - " . esc_path($file_name);
2422                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2423                                         $title .= "/";
2424                                 }
2425                         }
2426                 }
2427         }
2428         my $content_type;
2429         # require explicit support from the UA if we are to send the page as
2430         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2431         # we have to do this because MSIE sometimes globs '*/*', pretending to
2432         # support xhtml+xml but choking when it gets what it asked for.
2433         if (defined $cgi->http('HTTP_ACCEPT') &&
2434             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2435             $cgi->Accept('application/xhtml+xml') != 0) {
2436                 $content_type = 'application/xhtml+xml';
2437         } else {
2438                 $content_type = 'text/html';
2439         }
2440         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2441                            -status=> $status, -expires => $expires);
2442         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2443         print <<EOF;
2444 <?xml version="1.0" encoding="utf-8"?>
2445 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2446 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2447 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2448 <!-- git core binaries version $git_version -->
2449 <head>
2450 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2451 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2452 <meta name="robots" content="index, nofollow"/>
2453 <title>$title</title>
2454 EOF
2455 # print out each stylesheet that exist
2456         if (defined $stylesheet) {
2457 #provides backwards capability for those people who define style sheet in a config file
2458                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2459         } else {
2460                 foreach my $stylesheet (@stylesheets) {
2461                         next unless $stylesheet;
2462                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2463                 }
2464         }
2465         if (defined $project) {
2466                 printf('<link rel="alternate" title="%s log RSS feed" '.
2467                        'href="%s" type="application/rss+xml" />'."\n",
2468                        esc_param($project), href(action=>"rss"));
2469                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2470                        'href="%s" type="application/rss+xml" />'."\n",
2471                        esc_param($project), href(action=>"rss",
2472                                                  extra_options=>"--no-merges"));
2473                 printf('<link rel="alternate" title="%s log Atom feed" '.
2474                        'href="%s" type="application/atom+xml" />'."\n",
2475                        esc_param($project), href(action=>"atom"));
2476                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2477                        'href="%s" type="application/atom+xml" />'."\n",
2478                        esc_param($project), href(action=>"atom",
2479                                                  extra_options=>"--no-merges"));
2480         } else {
2481                 printf('<link rel="alternate" title="%s projects list" '.
2482                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2483                        $site_name, href(project=>undef, action=>"project_index"));
2484                 printf('<link rel="alternate" title="%s projects feeds" '.
2485                        'href="%s" type="text/x-opml"/>'."\n",
2486                        $site_name, href(project=>undef, action=>"opml"));
2487         }
2488         if (defined $favicon) {
2489                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2490         }
2491
2492         print "</head>\n" .
2493               "<body>\n";
2494
2495         if (-f $site_header) {
2496                 open (my $fd, $site_header);
2497                 print <$fd>;
2498                 close $fd;
2499         }
2500
2501         print "<div class=\"page_header\">\n" .
2502               $cgi->a({-href => esc_url($logo_url),
2503                        -title => $logo_label},
2504                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2505         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2506         if (defined $project) {
2507                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2508                 if (defined $action) {
2509                         print " / $action";
2510                 }
2511                 print "\n";
2512         }
2513         print "</div>\n";
2514
2515         my ($have_search) = gitweb_check_feature('search');
2516         if ((defined $project) && ($have_search)) {
2517                 if (!defined $searchtext) {
2518                         $searchtext = "";
2519                 }
2520                 my $search_hash;
2521                 if (defined $hash_base) {
2522                         $search_hash = $hash_base;
2523                 } elsif (defined $hash) {
2524                         $search_hash = $hash;
2525                 } else {
2526                         $search_hash = "HEAD";
2527                 }
2528                 my $action = $my_uri;
2529                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2530                 if ($use_pathinfo) {
2531                         $action .= "/$project";
2532                 } else {
2533                         $cgi->param("p", $project);
2534                 }
2535                 $cgi->param("a", "search");
2536                 $cgi->param("h", $search_hash);
2537                 print $cgi->startform(-method => "get", -action => $action) .
2538                       "<div class=\"search\">\n" .
2539                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2540                       $cgi->hidden(-name => "a") . "\n" .
2541                       $cgi->hidden(-name => "h") . "\n" .
2542                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2543                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2544                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2545                       " search:\n",
2546                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2547                       "</div>" .
2548                       $cgi->end_form() . "\n";
2549         }
2550 }
2551
2552 sub git_footer_html {
2553         print "<div class=\"page_footer\">\n";
2554         if (defined $project) {
2555                 my $descr = git_get_project_description($project);
2556                 if (defined $descr) {
2557                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2558                 }
2559                 print $cgi->a({-href => href(action=>"rss"),
2560                               -class => "rss_logo"}, "RSS") . " ";
2561                 print $cgi->a({-href => href(action=>"atom"),
2562                               -class => "rss_logo"}, "Atom") . "\n";
2563         } else {
2564                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2565                               -class => "rss_logo"}, "OPML") . " ";
2566                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2567                               -class => "rss_logo"}, "TXT") . "\n";
2568         }
2569         print "</div>\n" ;
2570
2571         if (-f $site_footer) {
2572                 open (my $fd, $site_footer);
2573                 print <$fd>;
2574                 close $fd;
2575         }
2576
2577         print "</body>\n" .
2578               "</html>";
2579 }
2580
2581 sub die_error {
2582         my $status = shift || "403 Forbidden";
2583         my $error = shift || "Malformed query, file missing or permission denied";
2584
2585         git_header_html($status);
2586         print <<EOF;
2587 <div class="page_body">
2588 <br /><br />
2589 $status - $error
2590 <br />
2591 </div>
2592 EOF
2593         git_footer_html();
2594         exit;
2595 }
2596
2597 ## ----------------------------------------------------------------------
2598 ## functions printing or outputting HTML: navigation
2599
2600 sub git_print_page_nav {
2601         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2602         $extra = '' if !defined $extra; # pager or formats
2603
2604         my @navs = qw(summary shortlog log commit commitdiff tree);
2605         if ($suppress) {
2606                 @navs = grep { $_ ne $suppress } @navs;
2607         }
2608
2609         my %arg = map { $_ => {action=>$_} } @navs;
2610         if (defined $head) {
2611                 for (qw(commit commitdiff)) {
2612                         $arg{$_}{'hash'} = $head;
2613                 }
2614                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2615                         for (qw(shortlog log)) {
2616                                 $arg{$_}{'hash'} = $head;
2617                         }
2618                 }
2619         }
2620         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2621         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2622
2623         print "<div class=\"page_nav\">\n" .
2624                 (join " | ",
2625                  map { $_ eq $current ?
2626                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2627                  } @navs);
2628         print "<br/>\n$extra<br/>\n" .
2629               "</div>\n";
2630 }
2631
2632 sub format_paging_nav {
2633         my ($action, $hash, $head, $page, $nrevs) = @_;
2634         my $paging_nav;
2635
2636
2637         if ($hash ne $head || $page) {
2638                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2639         } else {
2640                 $paging_nav .= "HEAD";
2641         }
2642
2643         if ($page > 0) {
2644                 $paging_nav .= " &sdot; " .
2645                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2646                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2647         } else {
2648                 $paging_nav .= " &sdot; prev";
2649         }
2650
2651         if ($nrevs >= (100 * ($page+1)-1)) {
2652                 $paging_nav .= " &sdot; " .
2653                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2654                                  -accesskey => "n", -title => "Alt-n"}, "next");
2655         } else {
2656                 $paging_nav .= " &sdot; next";
2657         }
2658
2659         return $paging_nav;
2660 }
2661
2662 ## ......................................................................
2663 ## functions printing or outputting HTML: div
2664
2665 sub git_print_header_div {
2666         my ($action, $title, $hash, $hash_base) = @_;
2667         my %args = ();
2668
2669         $args{'action'} = $action;
2670         $args{'hash'} = $hash if $hash;
2671         $args{'hash_base'} = $hash_base if $hash_base;
2672
2673         print "<div class=\"header\">\n" .
2674               $cgi->a({-href => href(%args), -class => "title"},
2675               $title ? $title : $action) .
2676               "\n</div>\n";
2677 }
2678
2679 #sub git_print_authorship (\%) {
2680 sub git_print_authorship {
2681         my $co = shift;
2682
2683         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2684         print "<div class=\"author_date\">" .
2685               esc_html($co->{'author_name'}) .
2686               " [$ad{'rfc2822'}";
2687         if ($ad{'hour_local'} < 6) {
2688                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2689                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2690         } else {
2691                 printf(" (%02d:%02d %s)",
2692                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2693         }
2694         print "]</div>\n";
2695 }
2696
2697 sub git_print_page_path {
2698         my $name = shift;
2699         my $type = shift;
2700         my $hb = shift;
2701
2702
2703         print "<div class=\"page_path\">";
2704         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2705                       -title => 'tree root'}, to_utf8("[$project]"));
2706         print " / ";
2707         if (defined $name) {
2708                 my @dirname = split '/', $name;
2709                 my $basename = pop @dirname;
2710                 my $fullname = '';
2711
2712                 foreach my $dir (@dirname) {
2713                         $fullname .= ($fullname ? '/' : '') . $dir;
2714                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2715                                                      hash_base=>$hb),
2716                                       -title => $fullname}, esc_path($dir));
2717                         print " / ";
2718                 }
2719                 if (defined $type && $type eq 'blob') {
2720                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2721                                                      hash_base=>$hb),
2722                                       -title => $name}, esc_path($basename));
2723                 } elsif (defined $type && $type eq 'tree') {
2724                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2725                                                      hash_base=>$hb),
2726                                       -title => $name}, esc_path($basename));
2727                         print " / ";
2728                 } else {
2729                         print esc_path($basename);
2730                 }
2731         }
2732         print "<br/></div>\n";
2733 }
2734
2735 # sub git_print_log (\@;%) {
2736 sub git_print_log ($;%) {
2737         my $log = shift;
2738         my %opts = @_;
2739
2740         if ($opts{'-remove_title'}) {
2741                 # remove title, i.e. first line of log
2742                 shift @$log;
2743         }
2744         # remove leading empty lines
2745         while (defined $log->[0] && $log->[0] eq "") {
2746                 shift @$log;
2747         }
2748
2749         # print log
2750         my $signoff = 0;
2751         my $empty = 0;
2752         foreach my $line (@$log) {
2753                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2754                         $signoff = 1;
2755                         $empty = 0;
2756                         if (! $opts{'-remove_signoff'}) {
2757                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2758                                 next;
2759                         } else {
2760                                 # remove signoff lines
2761                                 next;
2762                         }
2763                 } else {
2764                         $signoff = 0;
2765                 }
2766
2767                 # print only one empty line
2768                 # do not print empty line after signoff
2769                 if ($line eq "") {
2770                         next if ($empty || $signoff);
2771                         $empty = 1;
2772                 } else {
2773                         $empty = 0;
2774                 }
2775
2776                 print format_log_line_html($line) . "<br/>\n";
2777         }
2778
2779         if ($opts{'-final_empty_line'}) {
2780                 # end with single empty line
2781                 print "<br/>\n" unless $empty;
2782         }
2783 }
2784
2785 # return link target (what link points to)
2786 sub git_get_link_target {
2787         my $hash = shift;
2788         my $link_target;
2789
2790         # read link
2791         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2792                 or return;
2793         {
2794                 local $/;
2795                 $link_target = <$fd>;
2796         }
2797         close $fd
2798                 or return;
2799
2800         return $link_target;
2801 }
2802
2803 # given link target, and the directory (basedir) the link is in,
2804 # return target of link relative to top directory (top tree);
2805 # return undef if it is not possible (including absolute links).
2806 sub normalize_link_target {
2807         my ($link_target, $basedir, $hash_base) = @_;
2808
2809         # we can normalize symlink target only if $hash_base is provided
2810         return unless $hash_base;
2811
2812         # absolute symlinks (beginning with '/') cannot be normalized
2813         return if (substr($link_target, 0, 1) eq '/');
2814
2815         # normalize link target to path from top (root) tree (dir)
2816         my $path;
2817         if ($basedir) {
2818                 $path = $basedir . '/' . $link_target;
2819         } else {
2820                 # we are in top (root) tree (dir)
2821                 $path = $link_target;
2822         }
2823
2824         # remove //, /./, and /../
2825         my @path_parts;
2826         foreach my $part (split('/', $path)) {
2827                 # discard '.' and ''
2828                 next if (!$part || $part eq '.');
2829                 # handle '..'
2830                 if ($part eq '..') {
2831                         if (@path_parts) {
2832                                 pop @path_parts;
2833                         } else {
2834                                 # link leads outside repository (outside top dir)
2835                                 return;
2836                         }
2837                 } else {
2838                         push @path_parts, $part;
2839                 }
2840         }
2841         $path = join('/', @path_parts);
2842
2843         return $path;
2844 }
2845
2846 # print tree entry (row of git_tree), but without encompassing <tr> element
2847 sub git_print_tree_entry {
2848         my ($t, $basedir, $hash_base, $have_blame) = @_;
2849
2850         my %base_key = ();
2851         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2852
2853         # The format of a table row is: mode list link.  Where mode is
2854         # the mode of the entry, list is the name of the entry, an href,
2855         # and link is the action links of the entry.
2856
2857         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2858         if ($t->{'type'} eq "blob") {
2859                 print "<td class=\"list\">" .
2860                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2861                                                file_name=>"$basedir$t->{'name'}", %base_key),
2862                                 -class => "list"}, esc_path($t->{'name'}));
2863                 if (S_ISLNK(oct $t->{'mode'})) {
2864                         my $link_target = git_get_link_target($t->{'hash'});
2865                         if ($link_target) {
2866                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2867                                 if (defined $norm_target) {
2868                                         print " -> " .
2869                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2870                                                                      file_name=>$norm_target),
2871                                                        -title => $norm_target}, esc_path($link_target));
2872                                 } else {
2873                                         print " -> " . esc_path($link_target);
2874                                 }
2875                         }
2876                 }
2877                 print "</td>\n";
2878                 print "<td class=\"link\">";
2879                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2880                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2881                               "blob");
2882                 if ($have_blame) {
2883                         print " | " .
2884                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2885                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2886                                       "blame");
2887                 }
2888                 if (defined $hash_base) {
2889                         print " | " .
2890                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2891                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2892                                       "history");
2893                 }
2894                 print " | " .
2895                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2896                                                file_name=>"$basedir$t->{'name'}")},
2897                                 "raw");
2898                 print "</td>\n";
2899
2900         } elsif ($t->{'type'} eq "tree") {
2901                 print "<td class=\"list\">";
2902                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2903                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2904                               esc_path($t->{'name'}));
2905                 print "</td>\n";
2906                 print "<td class=\"link\">";
2907                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2908                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2909                               "tree");
2910                 if (defined $hash_base) {
2911                         print " | " .
2912                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2913                                                      file_name=>"$basedir$t->{'name'}")},
2914                                       "history");
2915                 }
2916                 print "</td>\n";
2917         } else {
2918                 # unknown object: we can only present history for it
2919                 # (this includes 'commit' object, i.e. submodule support)
2920                 print "<td class=\"list\">" .
2921                       esc_path($t->{'name'}) .
2922                       "</td>\n";
2923                 print "<td class=\"link\">";
2924                 if (defined $hash_base) {
2925                         print $cgi->a({-href => href(action=>"history",
2926                                                      hash_base=>$hash_base,
2927                                                      file_name=>"$basedir$t->{'name'}")},
2928                                       "history");
2929                 }
2930                 print "</td>\n";
2931         }
2932 }
2933
2934 ## ......................................................................
2935 ## functions printing large fragments of HTML
2936
2937 # get pre-image filenames for merge (combined) diff
2938 sub fill_from_file_info {
2939         my ($diff, @parents) = @_;
2940
2941         $diff->{'from_file'} = [ ];
2942         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2943         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2944                 if ($diff->{'status'}[$i] eq 'R' ||
2945                     $diff->{'status'}[$i] eq 'C') {
2946                         $diff->{'from_file'}[$i] =
2947                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2948                 }
2949         }
2950
2951         return $diff;
2952 }
2953
2954 # is current raw difftree line of file deletion
2955 sub is_deleted {
2956         my $diffinfo = shift;
2957
2958         return $diffinfo->{'status_str'} =~ /D/;
2959 }
2960
2961 # does patch correspond to [previous] difftree raw line
2962 # $diffinfo  - hashref of parsed raw diff format
2963 # $patchinfo - hashref of parsed patch diff format
2964 #              (the same keys as in $diffinfo)
2965 sub is_patch_split {
2966         my ($diffinfo, $patchinfo) = @_;
2967
2968         return defined $diffinfo && defined $patchinfo
2969                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2970 }
2971
2972
2973 sub git_difftree_body {
2974         my ($difftree, $hash, @parents) = @_;
2975         my ($parent) = $parents[0];
2976         my ($have_blame) = gitweb_check_feature('blame');
2977         print "<div class=\"list_head\">\n";
2978         if ($#{$difftree} > 10) {
2979                 print(($#{$difftree} + 1) . " files changed:\n");
2980         }
2981         print "</div>\n";
2982
2983         print "<table class=\"" .
2984               (@parents > 1 ? "combined " : "") .
2985               "diff_tree\">\n";
2986
2987         # header only for combined diff in 'commitdiff' view
2988         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2989         if ($has_header) {
2990                 # table header
2991                 print "<thead><tr>\n" .
2992                        "<th></th><th></th>\n"; # filename, patchN link
2993                 for (my $i = 0; $i < @parents; $i++) {
2994                         my $par = $parents[$i];
2995                         print "<th>" .
2996                               $cgi->a({-href => href(action=>"commitdiff",
2997                                                      hash=>$hash, hash_parent=>$par),
2998                                        -title => 'commitdiff to parent number ' .
2999                                                   ($i+1) . ': ' . substr($par,0,7)},
3000                                       $i+1) .
3001                               "&nbsp;</th>\n";
3002                 }
3003                 print "</tr></thead>\n<tbody>\n";
3004         }
3005
3006         my $alternate = 1;
3007         my $patchno = 0;
3008         foreach my $line (@{$difftree}) {
3009                 my $diff = parsed_difftree_line($line);
3010
3011                 if ($alternate) {
3012                         print "<tr class=\"dark\">\n";
3013                 } else {
3014                         print "<tr class=\"light\">\n";
3015                 }
3016                 $alternate ^= 1;
3017
3018                 if (exists $diff->{'nparents'}) { # combined diff
3019
3020                         fill_from_file_info($diff, @parents)
3021                                 unless exists $diff->{'from_file'};
3022
3023                         if (!is_deleted($diff)) {
3024                                 # file exists in the result (child) commit
3025                                 print "<td>" .
3026                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3027                                                              file_name=>$diff->{'to_file'},
3028                                                              hash_base=>$hash),
3029                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3030                                       "</td>\n";
3031                         } else {
3032                                 print "<td>" .
3033                                       esc_path($diff->{'to_file'}) .
3034                                       "</td>\n";
3035                         }
3036
3037                         if ($action eq 'commitdiff') {
3038                                 # link to patch
3039                                 $patchno++;
3040                                 print "<td class=\"link\">" .
3041                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3042                                       " | " .
3043                                       "</td>\n";
3044                         }
3045
3046                         my $has_history = 0;
3047                         my $not_deleted = 0;
3048                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3049                                 my $hash_parent = $parents[$i];
3050                                 my $from_hash = $diff->{'from_id'}[$i];
3051                                 my $from_path = $diff->{'from_file'}[$i];
3052                                 my $status = $diff->{'status'}[$i];
3053
3054                                 $has_history ||= ($status ne 'A');
3055                                 $not_deleted ||= ($status ne 'D');
3056
3057                                 if ($status eq 'A') {
3058                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3059                                 } elsif ($status eq 'D') {
3060                                         print "<td class=\"link\">" .
3061                                               $cgi->a({-href => href(action=>"blob",
3062                                                                      hash_base=>$hash,
3063                                                                      hash=>$from_hash,
3064                                                                      file_name=>$from_path)},
3065                                                       "blob" . ($i+1)) .
3066                                               " | </td>\n";
3067                                 } else {
3068                                         if ($diff->{'to_id'} eq $from_hash) {
3069                                                 print "<td class=\"link nochange\">";
3070                                         } else {
3071                                                 print "<td class=\"link\">";
3072                                         }
3073                                         print $cgi->a({-href => href(action=>"blobdiff",
3074                                                                      hash=>$diff->{'to_id'},
3075                                                                      hash_parent=>$from_hash,
3076                                                                      hash_base=>$hash,
3077                                                                      hash_parent_base=>$hash_parent,
3078                                                                      file_name=>$diff->{'to_file'},
3079                                                                      file_parent=>$from_path)},
3080                                                       "diff" . ($i+1)) .
3081                                               " | </td>\n";
3082                                 }
3083                         }
3084
3085                         print "<td class=\"link\">";
3086                         if ($not_deleted) {
3087                                 print $cgi->a({-href => href(action=>"blob",
3088                                                              hash=>$diff->{'to_id'},
3089                                                              file_name=>$diff->{'to_file'},
3090                                                              hash_base=>$hash)},
3091                                               "blob");
3092                                 print " | " if ($has_history);
3093                         }
3094                         if ($has_history) {
3095                                 print $cgi->a({-href => href(action=>"history",
3096                                                              file_name=>$diff->{'to_file'},
3097                                                              hash_base=>$hash)},
3098                                               "history");
3099                         }
3100                         print "</td>\n";
3101
3102                         print "</tr>\n";
3103                         next; # instead of 'else' clause, to avoid extra indent
3104                 }
3105                 # else ordinary diff
3106
3107                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3108                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3109                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3110                         $to_mode_oct = oct $diff->{'to_mode'};
3111                         if (S_ISREG($to_mode_oct)) { # only for regular file
3112                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3113                         }
3114                         $to_file_type = file_type($diff->{'to_mode'});
3115                 }
3116                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3117                         $from_mode_oct = oct $diff->{'from_mode'};
3118                         if (S_ISREG($to_mode_oct)) { # only for regular file
3119                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3120                         }
3121                         $from_file_type = file_type($diff->{'from_mode'});
3122                 }
3123
3124                 if ($diff->{'status'} eq "A") { # created
3125                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3126                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3127                         $mode_chng   .= "]</span>";
3128                         print "<td>";
3129                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3130                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3131                                       -class => "list"}, esc_path($diff->{'file'}));
3132                         print "</td>\n";
3133                         print "<td>$mode_chng</td>\n";
3134                         print "<td class=\"link\">";
3135                         if ($action eq 'commitdiff') {
3136                                 # link to patch
3137                                 $patchno++;
3138                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3139                                 print " | ";
3140                         }
3141                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3142                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3143                                       "blob");
3144                         print "</td>\n";
3145
3146                 } elsif ($diff->{'status'} eq "D") { # deleted
3147                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3148                         print "<td>";
3149                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3150                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3151                                        -class => "list"}, esc_path($diff->{'file'}));
3152                         print "</td>\n";
3153                         print "<td>$mode_chng</td>\n";
3154                         print "<td class=\"link\">";
3155                         if ($action eq 'commitdiff') {
3156                                 # link to patch
3157                                 $patchno++;
3158                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3159                                 print " | ";
3160                         }
3161                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3162                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3163                                       "blob") . " | ";
3164                         if ($have_blame) {
3165                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3166                                                              file_name=>$diff->{'file'})},
3167                                               "blame") . " | ";
3168                         }
3169                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3170                                                      file_name=>$diff->{'file'})},
3171                                       "history");
3172                         print "</td>\n";
3173
3174                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3175                         my $mode_chnge = "";
3176                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3177                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3178                                 if ($from_file_type ne $to_file_type) {
3179                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3180                                 }
3181                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3182                                         if ($from_mode_str && $to_mode_str) {
3183                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3184                                         } elsif ($to_mode_str) {
3185                                                 $mode_chnge .= " mode: $to_mode_str";
3186                                         }
3187                                 }
3188                                 $mode_chnge .= "]</span>\n";
3189                         }
3190                         print "<td>";
3191                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3192                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3193                                       -class => "list"}, esc_path($diff->{'file'}));
3194                         print "</td>\n";
3195                         print "<td>$mode_chnge</td>\n";
3196                         print "<td class=\"link\">";
3197                         if ($action eq 'commitdiff') {
3198                                 # link to patch
3199                                 $patchno++;
3200                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3201                                       " | ";
3202                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3203                                 # "commit" view and modified file (not onlu mode changed)
3204                                 print $cgi->a({-href => href(action=>"blobdiff",
3205                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3206                                                              hash_base=>$hash, hash_parent_base=>$parent,
3207                                                              file_name=>$diff->{'file'})},
3208                                               "diff") .
3209                                       " | ";
3210                         }
3211                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3212                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3213                                        "blob") . " | ";
3214                         if ($have_blame) {
3215                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3216                                                              file_name=>$diff->{'file'})},
3217                                               "blame") . " | ";
3218                         }
3219                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3220                                                      file_name=>$diff->{'file'})},
3221                                       "history");
3222                         print "</td>\n";
3223
3224                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3225                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3226                         my $nstatus = $status_name{$diff->{'status'}};
3227                         my $mode_chng = "";
3228                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3229                                 # mode also for directories, so we cannot use $to_mode_str
3230                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3231                         }
3232                         print "<td>" .
3233                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3234                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3235                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3236                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3237                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3238                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3239                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3240                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3241                               "<td class=\"link\">";
3242                         if ($action eq 'commitdiff') {
3243                                 # link to patch
3244                                 $patchno++;
3245                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3246                                       " | ";
3247                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3248                                 # "commit" view and modified file (not only pure rename or copy)
3249                                 print $cgi->a({-href => href(action=>"blobdiff",
3250                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3251                                                              hash_base=>$hash, hash_parent_base=>$parent,
3252                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3253                                               "diff") .
3254                                       " | ";
3255                         }
3256                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3257                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3258                                       "blob") . " | ";
3259                         if ($have_blame) {
3260                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3261                                                              file_name=>$diff->{'to_file'})},
3262                                               "blame") . " | ";
3263                         }
3264                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3265                                                     file_name=>$diff->{'to_file'})},
3266                                       "history");
3267                         print "</td>\n";
3268
3269                 } # we should not encounter Unmerged (U) or Unknown (X) status
3270                 print "</tr>\n";
3271         }
3272         print "</tbody>" if $has_header;
3273         print "</table>\n";
3274 }
3275
3276 sub git_patchset_body {
3277         my ($fd, $difftree, $hash, @hash_parents) = @_;
3278         my ($hash_parent) = $hash_parents[0];
3279
3280         my $is_combined = (@hash_parents > 1);
3281         my $patch_idx = 0;
3282         my $patch_number = 0;
3283         my $patch_line;
3284         my $diffinfo;
3285         my $to_name;
3286         my (%from, %to);
3287
3288         print "<div class=\"patchset\">\n";
3289
3290         # skip to first patch
3291         while ($patch_line = <$fd>) {
3292                 chomp $patch_line;
3293
3294                 last if ($patch_line =~ m/^diff /);
3295         }
3296
3297  PATCH:
3298         while ($patch_line) {
3299
3300                 # parse "git diff" header line
3301                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3302                         # $1 is from_name, which we do not use
3303                         $to_name = unquote($2);
3304                         $to_name =~ s!^b/!!;
3305                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3306                         # $1 is 'cc' or 'combined', which we do not use
3307                         $to_name = unquote($2);
3308                 } else {
3309                         $to_name = undef;
3310                 }
3311
3312                 # check if current patch belong to current raw line
3313                 # and parse raw git-diff line if needed
3314                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3315                         # this is continuation of a split patch
3316                         print "<div class=\"patch cont\">\n";
3317                 } else {
3318                         # advance raw git-diff output if needed
3319                         $patch_idx++ if defined $diffinfo;
3320
3321                         # read and prepare patch information
3322                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3323
3324                         # compact combined diff output can have some patches skipped
3325                         # find which patch (using pathname of result) we are at now;
3326                         if ($is_combined) {
3327                                 while ($to_name ne $diffinfo->{'to_file'}) {
3328                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3329                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3330                                               "</div>\n";  # class="patch"
3331
3332                                         $patch_idx++;
3333                                         $patch_number++;
3334
3335                                         last if $patch_idx > $#$difftree;
3336                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3337                                 }
3338                         }
3339
3340                         # modifies %from, %to hashes
3341                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3342
3343                         # this is first patch for raw difftree line with $patch_idx index
3344                         # we index @$difftree array from 0, but number patches from 1
3345                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3346                 }
3347
3348                 # git diff header
3349                 #assert($patch_line =~ m/^diff /) if DEBUG;
3350                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3351                 $patch_number++;
3352                 # print "git diff" header
3353                 print format_git_diff_header_line($patch_line, $diffinfo,
3354                                                   \%from, \%to);
3355
3356                 # print extended diff header
3357                 print "<div class=\"diff extended_header\">\n";
3358         EXTENDED_HEADER:
3359                 while ($patch_line = <$fd>) {
3360                         chomp $patch_line;
3361
3362                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3363
3364                         print format_extended_diff_header_line($patch_line, $diffinfo,
3365                                                                \%from, \%to);
3366                 }
3367                 print "</div>\n"; # class="diff extended_header"
3368
3369                 # from-file/to-file diff header
3370                 if (! $patch_line) {
3371                         print "</div>\n"; # class="patch"
3372                         last PATCH;
3373                 }
3374                 next PATCH if ($patch_line =~ m/^diff /);
3375                 #assert($patch_line =~ m/^---/) if DEBUG;
3376
3377                 my $last_patch_line = $patch_line;
3378                 $patch_line = <$fd>;
3379                 chomp $patch_line;
3380                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3381
3382                 print format_diff_from_to_header($last_patch_line, $patch_line,
3383                                                  $diffinfo, \%from, \%to,
3384                                                  @hash_parents);
3385
3386                 # the patch itself
3387         LINE:
3388                 while ($patch_line = <$fd>) {
3389                         chomp $patch_line;
3390
3391                         next PATCH if ($patch_line =~ m/^diff /);
3392
3393                         print format_diff_line($patch_line, \%from, \%to);
3394                 }
3395
3396         } continue {
3397                 print "</div>\n"; # class="patch"
3398         }
3399
3400         # for compact combined (--cc) format, with chunk and patch simpliciaction
3401         # patchset might be empty, but there might be unprocessed raw lines
3402         for (++$patch_idx if $patch_number > 0;
3403              $patch_idx < @$difftree;
3404              ++$patch_idx) {
3405                 # read and prepare patch information
3406                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3407
3408                 # generate anchor for "patch" links in difftree / whatchanged part
3409                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3410                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3411                       "</div>\n";  # class="patch"
3412
3413                 $patch_number++;
3414         }
3415
3416         if ($patch_number == 0) {
3417                 if (@hash_parents > 1) {
3418                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3419                 } else {
3420                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3421                 }
3422         }
3423
3424         print "</div>\n"; # class="patchset"
3425 }
3426
3427 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3428
3429 sub git_project_list_body {
3430         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3431
3432         my ($check_forks) = gitweb_check_feature('forks');
3433
3434         my @projects;
3435         foreach my $pr (@$projlist) {
3436                 my (@aa) = git_get_last_activity($pr->{'path'});
3437                 unless (@aa) {
3438                         next;
3439                 }
3440                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3441                 if (!defined $pr->{'descr'}) {
3442                         my $descr = git_get_project_description($pr->{'path'}) || "";
3443                         $pr->{'descr_long'} = to_utf8($descr);
3444                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3445                 }
3446                 if (!defined $pr->{'owner'}) {
3447                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3448                 }
3449                 if ($check_forks) {
3450                         my $pname = $pr->{'path'};
3451                         if (($pname =~ s/\.git$//) &&
3452                             ($pname !~ /\/$/) &&
3453                             (-d "$projectroot/$pname")) {
3454                                 $pr->{'forks'} = "-d $projectroot/$pname";
3455                         }
3456                         else {
3457                                 $pr->{'forks'} = 0;
3458                         }
3459                 }
3460                 push @projects, $pr;
3461         }
3462
3463         $order ||= $default_projects_order;
3464         $from = 0 unless defined $from;
3465         $to = $#projects if (!defined $to || $#projects < $to);
3466
3467         print "<table class=\"project_list\">\n";
3468         unless ($no_header) {
3469                 print "<tr>\n";
3470                 if ($check_forks) {
3471                         print "<th></th>\n";
3472                 }
3473                 if ($order eq "project") {
3474                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3475                         print "<th>Project</th>\n";
3476                 } else {
3477                         print "<th>" .
3478                               $cgi->a({-href => href(project=>undef, order=>'project'),
3479                                        -class => "header"}, "Project") .
3480                               "</th>\n";
3481                 }
3482                 if ($order eq "descr") {
3483                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3484                         print "<th>Description</th>\n";
3485                 } else {
3486                         print "<th>" .
3487                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3488                                        -class => "header"}, "Description") .
3489                               "</th>\n";
3490                 }
3491                 if ($order eq "owner") {
3492                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3493                         print "<th>Owner</th>\n";
3494                 } else {
3495                         print "<th>" .
3496                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3497                                        -class => "header"}, "Owner") .
3498                               "</th>\n";
3499                 }
3500                 if ($order eq "age") {
3501                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3502                         print "<th>Last Change</th>\n";
3503                 } else {
3504                         print "<th>" .
3505                               $cgi->a({-href => href(project=>undef, order=>'age'),
3506                                        -class => "header"}, "Last Change") .
3507                               "</th>\n";
3508                 }
3509                 print "<th></th>\n" .
3510                       "</tr>\n";
3511         }
3512         my $alternate = 1;
3513         for (my $i = $from; $i <= $to; $i++) {
3514                 my $pr = $projects[$i];
3515                 if ($alternate) {
3516                         print "<tr class=\"dark\">\n";
3517                 } else {
3518                         print "<tr class=\"light\">\n";
3519                 }
3520                 $alternate ^= 1;
3521                 if ($check_forks) {
3522                         print "<td>";
3523                         if ($pr->{'forks'}) {
3524                                 print "<!-- $pr->{'forks'} -->\n";
3525                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3526                         }
3527                         print "</td>\n";
3528                 }
3529                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3530                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3531                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3532                                         -class => "list", -title => $pr->{'descr_long'}},
3533                                         esc_html($pr->{'descr'})) . "</td>\n" .
3534                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3535                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3536                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3537                       "<td class=\"link\">" .
3538                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3539                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3540                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3541                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3542                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3543                       "</td>\n" .
3544                       "</tr>\n";
3545         }
3546         if (defined $extra) {
3547                 print "<tr>\n";
3548                 if ($check_forks) {
3549                         print "<td></td>\n";
3550                 }
3551                 print "<td colspan=\"5\">$extra</td>\n" .
3552                       "</tr>\n";
3553         }
3554         print "</table>\n";
3555 }
3556
3557 sub git_shortlog_body {
3558         # uses global variable $project
3559         my ($commitlist, $from, $to, $refs, $extra) = @_;
3560
3561         $from = 0 unless defined $from;
3562         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3563
3564         print "<table class=\"shortlog\">\n";
3565         my $alternate = 1;
3566         for (my $i = $from; $i <= $to; $i++) {
3567                 my %co = %{$commitlist->[$i]};
3568                 my $commit = $co{'id'};
3569                 my $ref = format_ref_marker($refs, $commit);
3570                 if ($alternate) {
3571                         print "<tr class=\"dark\">\n";
3572                 } else {
3573                         print "<tr class=\"light\">\n";
3574                 }
3575                 $alternate ^= 1;
3576                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3577                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3578                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3579                       "<td><i>" . $author . "</i></td>\n" .
3580                       "<td>";
3581                 print format_subject_html($co{'title'}, $co{'title_short'},
3582                                           href(action=>"commit", hash=>$commit), $ref);
3583                 print "</td>\n" .
3584                       "<td class=\"link\">" .
3585                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3586                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3587                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3588                 my $snapshot_links = format_snapshot_links($commit);
3589                 if (defined $snapshot_links) {
3590                         print " | " . $snapshot_links;
3591                 }
3592                 print "</td>\n" .
3593                       "</tr>\n";
3594         }
3595         if (defined $extra) {
3596                 print "<tr>\n" .
3597                       "<td colspan=\"4\">$extra</td>\n" .
3598                       "</tr>\n";
3599         }
3600         print "</table>\n";
3601 }
3602
3603 sub git_history_body {
3604         # Warning: assumes constant type (blob or tree) during history
3605         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3606
3607         $from = 0 unless defined $from;
3608         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3609
3610         print "<table class=\"history\">\n";
3611         my $alternate = 1;
3612         for (my $i = $from; $i <= $to; $i++) {
3613                 my %co = %{$commitlist->[$i]};
3614                 if (!%co) {
3615                         next;
3616                 }
3617                 my $commit = $co{'id'};
3618
3619                 my $ref = format_ref_marker($refs, $commit);
3620
3621                 if ($alternate) {
3622                         print "<tr class=\"dark\">\n";
3623                 } else {
3624                         print "<tr class=\"light\">\n";
3625                 }
3626                 $alternate ^= 1;
3627         # shortlog uses      chop_str($co{'author_name'}, 10)
3628                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3629                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3630                       "<td><i>" . $author . "</i></td>\n" .
3631                       "<td>";
3632                 # originally git_history used chop_str($co{'title'}, 50)
3633                 print format_subject_html($co{'title'}, $co{'title_short'},
3634                                           href(action=>"commit", hash=>$commit), $ref);
3635                 print "</td>\n" .
3636                       "<td class=\"link\">" .
3637                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3638                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3639
3640                 if ($ftype eq 'blob') {
3641                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3642                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3643                         if (defined $blob_current && defined $blob_parent &&
3644                                         $blob_current ne $blob_parent) {
3645                                 print " | " .
3646                                         $cgi->a({-href => href(action=>"blobdiff",
3647                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3648                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3649                                                                file_name=>$file_name)},
3650                                                 "diff to current");
3651                         }
3652                 }
3653                 print "</td>\n" .
3654                       "</tr>\n";
3655         }
3656         if (defined $extra) {
3657                 print "<tr>\n" .
3658                       "<td colspan=\"4\">$extra</td>\n" .
3659                       "</tr>\n";
3660         }
3661         print "</table>\n";
3662 }
3663
3664 sub git_tags_body {
3665         # uses global variable $project
3666         my ($taglist, $from, $to, $extra) = @_;
3667         $from = 0 unless defined $from;
3668         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3669
3670         print "<table class=\"tags\">\n";
3671         my $alternate = 1;
3672         for (my $i = $from; $i <= $to; $i++) {
3673                 my $entry = $taglist->[$i];
3674                 my %tag = %$entry;
3675                 my $comment = $tag{'subject'};
3676                 my $comment_short;
3677                 if (defined $comment) {
3678                         $comment_short = chop_str($comment, 30, 5);
3679                 }
3680                 if ($alternate) {
3681                         print "<tr class=\"dark\">\n";
3682                 } else {
3683                         print "<tr class=\"light\">\n";
3684                 }
3685                 $alternate ^= 1;
3686                 if (defined $tag{'age'}) {
3687                         print "<td><i>$tag{'age'}</i></td>\n";
3688                 } else {
3689                         print "<td></td>\n";
3690                 }
3691                 print "<td>" .
3692                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3693                                -class => "list name"}, esc_html($tag{'name'})) .
3694                       "</td>\n" .
3695                       "<td>";
3696                 if (defined $comment) {
3697                         print format_subject_html($comment, $comment_short,
3698                                                   href(action=>"tag", hash=>$tag{'id'}));
3699                 }
3700                 print "</td>\n" .
3701                       "<td class=\"selflink\">";
3702                 if ($tag{'type'} eq "tag") {
3703                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3704                 } else {
3705                         print "&nbsp;";
3706                 }
3707                 print "</td>\n" .
3708                       "<td class=\"link\">" . " | " .
3709                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3710                 if ($tag{'reftype'} eq "commit") {
3711                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3712                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3713                 } elsif ($tag{'reftype'} eq "blob") {
3714                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3715                 }
3716                 print "</td>\n" .
3717                       "</tr>";
3718         }
3719         if (defined $extra) {
3720                 print "<tr>\n" .
3721                       "<td colspan=\"5\">$extra</td>\n" .
3722                       "</tr>\n";
3723         }
3724         print "</table>\n";
3725 }
3726
3727 sub git_heads_body {
3728         # uses global variable $project
3729         my ($headlist, $head, $from, $to, $extra) = @_;
3730         $from = 0 unless defined $from;
3731         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3732
3733         print "<table class=\"heads\">\n";
3734         my $alternate = 1;
3735         for (my $i = $from; $i <= $to; $i++) {
3736                 my $entry = $headlist->[$i];
3737                 my %ref = %$entry;
3738                 my $curr = $ref{'id'} eq $head;
3739                 if ($alternate) {
3740                         print "<tr class=\"dark\">\n";
3741                 } else {
3742                         print "<tr class=\"light\">\n";
3743                 }
3744                 $alternate ^= 1;
3745                 print "<td><i>$ref{'age'}</i></td>\n" .
3746                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3747                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3748                                -class => "list name"},esc_html($ref{'name'})) .
3749                       "</td>\n" .
3750                       "<td class=\"link\">" .
3751                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3752                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3753                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3754                       "</td>\n" .
3755                       "</tr>";
3756         }
3757         if (defined $extra) {
3758                 print "<tr>\n" .
3759                       "<td colspan=\"3\">$extra</td>\n" .
3760                       "</tr>\n";
3761         }
3762         print "</table>\n";
3763 }
3764
3765 sub git_search_grep_body {
3766         my ($commitlist, $from, $to, $extra) = @_;
3767         $from = 0 unless defined $from;
3768         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3769
3770         print "<table class=\"commit_search\">\n";
3771         my $alternate = 1;
3772         for (my $i = $from; $i <= $to; $i++) {
3773                 my %co = %{$commitlist->[$i]};
3774                 if (!%co) {
3775                         next;
3776                 }
3777                 my $commit = $co{'id'};
3778                 if ($alternate) {
3779                         print "<tr class=\"dark\">\n";
3780                 } else {
3781                         print "<tr class=\"light\">\n";
3782                 }
3783                 $alternate ^= 1;
3784                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3785                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3786                       "<td><i>" . $author . "</i></td>\n" .
3787                       "<td>" .
3788                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3789                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3790                 my $comment = $co{'comment'};
3791                 foreach my $line (@$comment) {
3792                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3793                                 my $lead = esc_html($1) || "";
3794                                 $lead = chop_str($lead, 30, 10);
3795                                 my $match = esc_html($2) || "";
3796                                 my $trail = esc_html($3) || "";
3797                                 $trail = chop_str($trail, 30, 10);
3798                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3799                                 print chop_str($text, 80, 5) . "<br/>\n";
3800                         }
3801                 }
3802                 print "</td>\n" .
3803                       "<td class=\"link\">" .
3804                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3805                       " | " .
3806                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3807                       " | " .
3808                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3809                 print "</td>\n" .
3810                       "</tr>\n";
3811         }
3812         if (defined $extra) {
3813                 print "<tr>\n" .
3814                       "<td colspan=\"3\">$extra</td>\n" .
3815                       "</tr>\n";
3816         }
3817         print "</table>\n";
3818 }
3819
3820 ## ======================================================================
3821 ## ======================================================================
3822 ## actions
3823
3824 sub git_project_list {
3825         my $order = $cgi->param('o');
3826         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3827                 die_error(undef, "Unknown order parameter");
3828         }
3829
3830         my @list = git_get_projects_list();
3831         if (!@list) {
3832                 die_error(undef, "No projects found");
3833         }
3834
3835         git_header_html();
3836         if (-f $home_text) {
3837                 print "<div class=\"index_include\">\n";
3838                 open (my $fd, $home_text);
3839                 print <$fd>;
3840                 close $fd;
3841                 print "</div>\n";
3842         }
3843         git_project_list_body(\@list, $order);
3844         git_footer_html();
3845 }
3846
3847 sub git_forks {
3848         my $order = $cgi->param('o');
3849         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3850                 die_error(undef, "Unknown order parameter");
3851         }
3852
3853         my @list = git_get_projects_list($project);
3854         if (!@list) {
3855                 die_error(undef, "No forks found");
3856         }
3857
3858         git_header_html();
3859         git_print_page_nav('','');
3860         git_print_header_div('summary', "$project forks");
3861         git_project_list_body(\@list, $order);
3862         git_footer_html();
3863 }
3864
3865 sub git_project_index {
3866         my @projects = git_get_projects_list($project);
3867
3868         print $cgi->header(
3869                 -type => 'text/plain',
3870                 -charset => 'utf-8',
3871                 -content_disposition => 'inline; filename="index.aux"');
3872
3873         foreach my $pr (@projects) {
3874                 if (!exists $pr->{'owner'}) {
3875                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3876                 }
3877
3878                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3879                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3880                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3881                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3882                 $path  =~ s/ /\+/g;
3883                 $owner =~ s/ /\+/g;
3884
3885                 print "$path $owner\n";
3886         }
3887 }
3888
3889 sub git_summary {
3890         my $descr = git_get_project_description($project) || "none";
3891         my %co = parse_commit("HEAD");
3892         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3893         my $head = $co{'id'};
3894
3895         my $owner = git_get_project_owner($project);
3896
3897         my $refs = git_get_references();
3898         # These get_*_list functions return one more to allow us to see if
3899         # there are more ...
3900         my @taglist  = git_get_tags_list(16);
3901         my @headlist = git_get_heads_list(16);
3902         my @forklist;
3903         my ($check_forks) = gitweb_check_feature('forks');
3904
3905         if ($check_forks) {
3906                 @forklist = git_get_projects_list($project);
3907         }
3908
3909         git_header_html();
3910         git_print_page_nav('summary','', $head);
3911
3912         print "<div class=\"title\">&nbsp;</div>\n";
3913         print "<table class=\"projects_list\">\n" .
3914               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3915               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3916         if (defined $cd{'rfc2822'}) {
3917                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3918         }
3919
3920         # use per project git URL list in $projectroot/$project/cloneurl
3921         # or make project git URL from git base URL and project name
3922         my $url_tag = "URL";
3923         my @url_list = git_get_project_url_list($project);
3924         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3925         foreach my $git_url (@url_list) {
3926                 next unless $git_url;
3927                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3928                 $url_tag = "";
3929         }
3930         print "</table>\n";
3931
3932         if (-s "$projectroot/$project/README.html") {
3933                 if (open my $fd, "$projectroot/$project/README.html") {
3934                         print "<div class=\"title\">readme</div>\n" .
3935                               "<div class=\"readme\">\n";
3936                         print $_ while (<$fd>);
3937                         print "\n</div>\n"; # class="readme"
3938                         close $fd;
3939                 }
3940         }
3941
3942         # we need to request one more than 16 (0..15) to check if
3943         # those 16 are all
3944         my @commitlist = $head ? parse_commits($head, 17) : ();
3945         if (@commitlist) {
3946                 git_print_header_div('shortlog');
3947                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3948                                   $#commitlist <=  15 ? undef :
3949                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3950         }
3951
3952         if (@taglist) {
3953                 git_print_header_div('tags');
3954                 git_tags_body(\@taglist, 0, 15,
3955                               $#taglist <=  15 ? undef :
3956                               $cgi->a({-href => href(action=>"tags")}, "..."));
3957         }
3958
3959         if (@headlist) {
3960                 git_print_header_div('heads');
3961                 git_heads_body(\@headlist, $head, 0, 15,
3962                                $#headlist <= 15 ? undef :
3963                                $cgi->a({-href => href(action=>"heads")}, "..."));
3964         }
3965
3966         if (@forklist) {
3967                 git_print_header_div('forks');
3968                 git_project_list_body(\@forklist, undef, 0, 15,
3969                                       $#forklist <= 15 ? undef :
3970                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3971                                       'noheader');
3972         }
3973
3974         git_footer_html();
3975 }
3976
3977 sub git_tag {
3978         my $head = git_get_head_hash($project);
3979         git_header_html();
3980         git_print_page_nav('','', $head,undef,$head);
3981         my %tag = parse_tag($hash);
3982
3983         if (! %tag) {
3984                 die_error(undef, "Unknown tag object");
3985         }
3986
3987         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3988         print "<div class=\"title_text\">\n" .
3989               "<table class=\"object_header\">\n" .
3990               "<tr>\n" .
3991               "<td>object</td>\n" .
3992               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3993                                $tag{'object'}) . "</td>\n" .
3994               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3995                                               $tag{'type'}) . "</td>\n" .
3996               "</tr>\n";
3997         if (defined($tag{'author'})) {
3998                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3999                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4000                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4001                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4002                         "</td></tr>\n";
4003         }
4004         print "</table>\n\n" .
4005               "</div>\n";
4006         print "<div class=\"page_body\">";
4007         my $comment = $tag{'comment'};
4008         foreach my $line (@$comment) {
4009                 chomp $line;
4010                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4011         }
4012         print "</div>\n";
4013         git_footer_html();
4014 }
4015
4016 sub git_blame2 {
4017         my $fd;
4018         my $ftype;
4019
4020         my ($have_blame) = gitweb_check_feature('blame');
4021         if (!$have_blame) {
4022                 die_error('403 Permission denied', "Permission denied");
4023         }
4024         die_error('404 Not Found', "File name not defined") if (!$file_name);
4025         $hash_base ||= git_get_head_hash($project);
4026         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4027         my %co = parse_commit($hash_base)
4028                 or die_error(undef, "Reading commit failed");
4029         if (!defined $hash) {
4030                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4031                         or die_error(undef, "Error looking up file");
4032         }
4033         $ftype = git_get_type($hash);
4034         if ($ftype !~ "blob") {
4035                 die_error('400 Bad Request', "Object is not a blob");
4036         }
4037         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4038               $file_name, $hash_base)
4039                 or die_error(undef, "Open git-blame failed");
4040         git_header_html();
4041         my $formats_nav =
4042                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4043                         "blob") .
4044                 " | " .
4045                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4046                         "history") .
4047                 " | " .
4048                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4049                         "HEAD");
4050         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4051         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4052         git_print_page_path($file_name, $ftype, $hash_base);
4053         my @rev_color = (qw(light2 dark2));
4054         my $num_colors = scalar(@rev_color);
4055         my $current_color = 0;
4056         my $last_rev;
4057         print <<HTML;
4058 <div class="page_body">
4059 <table class="blame">
4060 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4061 HTML
4062         my %metainfo = ();
4063         while (1) {
4064                 $_ = <$fd>;
4065                 last unless defined $_;
4066                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4067                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4068                 if (!exists $metainfo{$full_rev}) {
4069                         $metainfo{$full_rev} = {};
4070                 }
4071                 my $meta = $metainfo{$full_rev};
4072                 while (<$fd>) {
4073                         last if (s/^\t//);
4074                         if (/^(\S+) (.*)$/) {
4075                                 $meta->{$1} = $2;
4076                         }
4077                 }
4078                 my $data = $_;
4079                 chomp $data;
4080                 my $rev = substr($full_rev, 0, 8);
4081                 my $author = $meta->{'author'};
4082                 my %date = parse_date($meta->{'author-time'},
4083                                       $meta->{'author-tz'});
4084                 my $date = $date{'iso-tz'};
4085                 if ($group_size) {
4086                         $current_color = ++$current_color % $num_colors;
4087                 }
4088                 print "<tr class=\"$rev_color[$current_color]\">\n";
4089                 if ($group_size) {
4090                         print "<td class=\"sha1\"";
4091                         print " title=\"". esc_html($author) . ", $date\"";
4092                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4093                         print ">";
4094                         print $cgi->a({-href => href(action=>"commit",
4095                                                      hash=>$full_rev,
4096                                                      file_name=>$file_name)},
4097                                       esc_html($rev));
4098                         print "</td>\n";
4099                 }
4100                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4101                         or die_error(undef, "Open git-rev-parse failed");
4102                 my $parent_commit = <$dd>;
4103                 close $dd;
4104                 chomp($parent_commit);
4105                 my $blamed = href(action => 'blame',
4106                                   file_name => $meta->{'filename'},
4107                                   hash_base => $parent_commit);
4108                 print "<td class=\"linenr\">";
4109                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4110                                 -id => "l$lineno",
4111                                 -class => "linenr" },
4112                               esc_html($lineno));
4113                 print "</td>";
4114                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4115                 print "</tr>\n";
4116         }
4117         print "</table>\n";
4118         print "</div>";
4119         close $fd
4120                 or print "Reading blob failed\n";
4121         git_footer_html();
4122 }
4123
4124 sub git_blame {
4125         my $fd;
4126
4127         my ($have_blame) = gitweb_check_feature('blame');
4128         if (!$have_blame) {
4129                 die_error('403 Permission denied', "Permission denied");
4130         }
4131         die_error('404 Not Found', "File name not defined") if (!$file_name);
4132         $hash_base ||= git_get_head_hash($project);
4133         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4134         my %co = parse_commit($hash_base)
4135                 or die_error(undef, "Reading commit failed");
4136         if (!defined $hash) {
4137                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4138                         or die_error(undef, "Error lookup file");
4139         }
4140         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4141                 or die_error(undef, "Open git-annotate failed");
4142         git_header_html();
4143         my $formats_nav =
4144                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4145                         "blob") .
4146                 " | " .
4147                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4148                         "history") .
4149                 " | " .
4150                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4151                         "HEAD");
4152         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4153         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4154         git_print_page_path($file_name, 'blob', $hash_base);
4155         print "<div class=\"page_body\">\n";
4156         print <<HTML;
4157 <table class="blame">
4158   <tr>
4159     <th>Commit</th>
4160     <th>Age</th>
4161     <th>Author</th>
4162     <th>Line</th>
4163     <th>Data</th>
4164   </tr>
4165 HTML
4166         my @line_class = (qw(light dark));
4167         my $line_class_len = scalar (@line_class);
4168         my $line_class_num = $#line_class;
4169         while (my $line = <$fd>) {
4170                 my $long_rev;
4171                 my $short_rev;
4172                 my $author;
4173                 my $time;
4174                 my $lineno;
4175                 my $data;
4176                 my $age;
4177                 my $age_str;
4178                 my $age_class;
4179
4180                 chomp $line;
4181                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4182
4183                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4184                         $long_rev = $1;
4185                         $author   = $2;
4186                         $time     = $3;
4187                         $lineno   = $4;
4188                         $data     = $5;
4189                 } else {
4190                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4191                         next;
4192                 }
4193                 $short_rev  = substr ($long_rev, 0, 8);
4194                 $age        = time () - $time;
4195                 $age_str    = age_string ($age);
4196                 $age_str    =~ s/ /&nbsp;/g;
4197                 $age_class  = age_class($age);
4198                 $author     = esc_html ($author);
4199                 $author     =~ s/ /&nbsp;/g;
4200
4201                 $data = untabify($data);
4202                 $data = esc_html ($data);
4203
4204                 print <<HTML;
4205   <tr class="$line_class[$line_class_num]">
4206     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4207     <td class="$age_class">$age_str</td>
4208     <td>$author</td>
4209     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4210     <td class="pre">$data</td>
4211   </tr>
4212 HTML
4213         } # while (my $line = <$fd>)
4214         print "</table>\n\n";
4215         close $fd
4216                 or print "Reading blob failed.\n";
4217         print "</div>";
4218         git_footer_html();
4219 }
4220
4221 sub git_tags {
4222         my $head = git_get_head_hash($project);
4223         git_header_html();
4224         git_print_page_nav('','', $head,undef,$head);
4225         git_print_header_div('summary', $project);
4226
4227         my @tagslist = git_get_tags_list();
4228         if (@tagslist) {
4229                 git_tags_body(\@tagslist);
4230         }
4231         git_footer_html();
4232 }
4233
4234 sub git_heads {
4235         my $head = git_get_head_hash($project);
4236         git_header_html();
4237         git_print_page_nav('','', $head,undef,$head);
4238         git_print_header_div('summary', $project);
4239
4240         my @headslist = git_get_heads_list();
4241         if (@headslist) {
4242                 git_heads_body(\@headslist, $head);
4243         }
4244         git_footer_html();
4245 }
4246
4247 sub git_blob_plain {
4248         my $expires;
4249
4250         if (!defined $hash) {
4251                 if (defined $file_name) {
4252                         my $base = $hash_base || git_get_head_hash($project);
4253                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4254                                 or die_error(undef, "Error lookup file");
4255                 } else {
4256                         die_error(undef, "No file name defined");
4257                 }
4258         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4259                 # blobs defined by non-textual hash id's can be cached
4260                 $expires = "+1d";
4261         }
4262
4263         my $type = shift;
4264         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4265                 or die_error(undef, "Couldn't cat $file_name, $hash");
4266
4267         $type ||= blob_mimetype($fd, $file_name);
4268
4269         # save as filename, even when no $file_name is given
4270         my $save_as = "$hash";
4271         if (defined $file_name) {
4272                 $save_as = $file_name;
4273         } elsif ($type =~ m/^text\//) {
4274                 $save_as .= '.txt';
4275         }
4276
4277         print $cgi->header(
4278                 -type => "$type",
4279                 -expires=>$expires,
4280                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4281         undef $/;
4282         binmode STDOUT, ':raw';
4283         print <$fd>;
4284         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4285         $/ = "\n";
4286         close $fd;
4287 }
4288
4289 sub git_blob {
4290         my $expires;
4291
4292         if (!defined $hash) {
4293                 if (defined $file_name) {
4294                         my $base = $hash_base || git_get_head_hash($project);
4295                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4296                                 or die_error(undef, "Error lookup file");
4297                 } else {
4298                         die_error(undef, "No file name defined");
4299                 }
4300         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4301                 # blobs defined by non-textual hash id's can be cached
4302                 $expires = "+1d";
4303         }
4304
4305         my ($have_blame) = gitweb_check_feature('blame');
4306         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4307                 or die_error(undef, "Couldn't cat $file_name, $hash");
4308         my $mimetype = blob_mimetype($fd, $file_name);
4309         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4310                 close $fd;
4311                 return git_blob_plain($mimetype);
4312         }
4313         # we can have blame only for text/* mimetype
4314         $have_blame &&= ($mimetype =~ m!^text/!);
4315
4316         git_header_html(undef, $expires);
4317         my $formats_nav = '';
4318         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4319                 if (defined $file_name) {
4320                         if ($have_blame) {
4321                                 $formats_nav .=
4322                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4323                                                 "blame") .
4324                                         " | ";
4325                         }
4326                         $formats_nav .=
4327                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4328                                         "history") .
4329                                 " | " .
4330                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4331                                         "raw") .
4332                                 " | " .
4333                                 $cgi->a({-href => href(action=>"blob",
4334                                                        hash_base=>"HEAD", file_name=>$file_name)},
4335                                         "HEAD");
4336                 } else {
4337                         $formats_nav .=
4338                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4339                                         "raw");
4340                 }
4341                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4342                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4343         } else {
4344                 print "<div class=\"page_nav\">\n" .
4345                       "<br/><br/></div>\n" .
4346                       "<div class=\"title\">$hash</div>\n";
4347         }
4348         git_print_page_path($file_name, "blob", $hash_base);
4349         print "<div class=\"page_body\">\n";
4350         if ($mimetype =~ m!^image/!) {
4351                 print qq!<img type="$mimetype"!;
4352                 if ($file_name) {
4353                         print qq! alt="$file_name" title="$file_name"!;
4354                 }
4355                 print qq! src="! .
4356                       href(action=>"blob_plain", hash=>$hash,
4357                            hash_base=>$hash_base, file_name=>$file_name) .
4358                       qq!" />\n!;
4359         } else {
4360                 my $nr;
4361                 while (my $line = <$fd>) {
4362                         chomp $line;
4363                         $nr++;
4364                         $line = untabify($line);
4365                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4366                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4367                 }
4368         }
4369         close $fd
4370                 or print "Reading blob failed.\n";
4371         print "</div>";
4372         git_footer_html();
4373 }
4374
4375 sub git_tree {
4376         if (!defined $hash_base) {
4377                 $hash_base = "HEAD";
4378         }
4379         if (!defined $hash) {
4380                 if (defined $file_name) {
4381                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4382                 } else {
4383                         $hash = $hash_base;
4384                 }
4385         }
4386         $/ = "\0";
4387         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4388                 or die_error(undef, "Open git-ls-tree failed");
4389         my @entries = map { chomp; $_ } <$fd>;
4390         close $fd or die_error(undef, "Reading tree failed");
4391         $/ = "\n";
4392
4393         my $refs = git_get_references();
4394         my $ref = format_ref_marker($refs, $hash_base);
4395         git_header_html();
4396         my $basedir = '';
4397         my ($have_blame) = gitweb_check_feature('blame');
4398         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4399                 my @views_nav = ();
4400                 if (defined $file_name) {
4401                         push @views_nav,
4402                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4403                                         "history"),
4404                                 $cgi->a({-href => href(action=>"tree",
4405                                                        hash_base=>"HEAD", file_name=>$file_name)},
4406                                         "HEAD"),
4407                 }
4408                 my $snapshot_links = format_snapshot_links($hash);
4409                 if (defined $snapshot_links) {
4410                         # FIXME: Should be available when we have no hash base as well.
4411                         push @views_nav, $snapshot_links;
4412                 }
4413                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4414                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4415         } else {
4416                 undef $hash_base;
4417                 print "<div class=\"page_nav\">\n";
4418                 print "<br/><br/></div>\n";
4419                 print "<div class=\"title\">$hash</div>\n";
4420         }
4421         if (defined $file_name) {
4422                 $basedir = $file_name;
4423                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4424                         $basedir .= '/';
4425                 }
4426         }
4427         git_print_page_path($file_name, 'tree', $hash_base);
4428         print "<div class=\"page_body\">\n";
4429         print "<table class=\"tree\">\n";
4430         my $alternate = 1;
4431         # '..' (top directory) link if possible
4432         if (defined $hash_base &&
4433             defined $file_name && $file_name =~ m![^/]+$!) {
4434                 if ($alternate) {
4435                         print "<tr class=\"dark\">\n";
4436                 } else {
4437                         print "<tr class=\"light\">\n";
4438                 }
4439                 $alternate ^= 1;
4440
4441                 my $up = $file_name;
4442                 $up =~ s!/?[^/]+$!!;
4443                 undef $up unless $up;
4444                 # based on git_print_tree_entry
4445                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4446                 print '<td class="list">';
4447                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4448                                              file_name=>$up)},
4449                               "..");
4450                 print "</td>\n";
4451                 print "<td class=\"link\"></td>\n";
4452
4453                 print "</tr>\n";
4454         }
4455         foreach my $line (@entries) {
4456                 my %t = parse_ls_tree_line($line, -z => 1);
4457
4458                 if ($alternate) {
4459                         print "<tr class=\"dark\">\n";
4460                 } else {
4461                         print "<tr class=\"light\">\n";
4462                 }
4463                 $alternate ^= 1;
4464
4465                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4466
4467                 print "</tr>\n";
4468         }
4469         print "</table>\n" .
4470               "</div>";
4471         git_footer_html();
4472 }
4473
4474 sub git_snapshot {
4475         my @supported_fmts = gitweb_check_feature('snapshot');
4476         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4477
4478         my $format = $cgi->param('sf');
4479         if (!@supported_fmts) {
4480                 die_error('403 Permission denied', "Permission denied");
4481         }
4482         # default to first supported snapshot format
4483         $format ||= $supported_fmts[0];
4484         if ($format !~ m/^[a-z0-9]+$/) {
4485                 die_error(undef, "Invalid snapshot format parameter");
4486         } elsif (!exists($known_snapshot_formats{$format})) {
4487                 die_error(undef, "Unknown snapshot format");
4488         } elsif (!grep($_ eq $format, @supported_fmts)) {
4489                 die_error(undef, "Unsupported snapshot format");
4490         }
4491
4492         if (!defined $hash) {
4493                 $hash = git_get_head_hash($project);
4494         }
4495
4496         my $git_command = git_cmd_str();
4497         my $name = $project;
4498         $name =~ s,([^/])/*\.git$,$1,;
4499         $name = basename($name);
4500         my $filename = to_utf8($name);
4501         $name =~ s/\047/\047\\\047\047/g;
4502         my $cmd;
4503         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4504         $cmd = "$git_command archive " .
4505                 "--format=$known_snapshot_formats{$format}{'format'} " .
4506                 "--prefix=\'$name\'/ $hash";
4507         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4508                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4509         }
4510
4511         print $cgi->header(
4512                 -type => $known_snapshot_formats{$format}{'type'},
4513                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4514                 -status => '200 OK');
4515
4516         open my $fd, "-|", $cmd
4517                 or die_error(undef, "Execute git-archive failed");
4518         binmode STDOUT, ':raw';
4519         print <$fd>;
4520         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4521         close $fd;
4522 }
4523
4524 sub git_log {
4525         my $head = git_get_head_hash($project);
4526         if (!defined $hash) {
4527                 $hash = $head;
4528         }
4529         if (!defined $page) {
4530                 $page = 0;
4531         }
4532         my $refs = git_get_references();
4533
4534         my @commitlist = parse_commits($hash, 101, (100 * $page));
4535
4536         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4537
4538         git_header_html();
4539         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4540
4541         if (!@commitlist) {
4542                 my %co = parse_commit($hash);
4543
4544                 git_print_header_div('summary', $project);
4545                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4546         }
4547         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4548         for (my $i = 0; $i <= $to; $i++) {
4549                 my %co = %{$commitlist[$i]};
4550                 next if !%co;
4551                 my $commit = $co{'id'};
4552                 my $ref = format_ref_marker($refs, $commit);
4553                 my %ad = parse_date($co{'author_epoch'});
4554                 git_print_header_div('commit',
4555                                "<span class=\"age\">$co{'age_string'}</span>" .
4556                                esc_html($co{'title'}) . $ref,
4557                                $commit);
4558                 print "<div class=\"title_text\">\n" .
4559                       "<div class=\"log_link\">\n" .
4560                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4561                       " | " .
4562                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4563                       " | " .
4564                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4565                       "<br/>\n" .
4566                       "</div>\n" .
4567                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4568                       "</div>\n";
4569
4570                 print "<div class=\"log_body\">\n";
4571                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4572                 print "</div>\n";
4573         }
4574         if ($#commitlist >= 100) {
4575                 print "<div class=\"page_nav\">\n";
4576                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4577                                -accesskey => "n", -title => "Alt-n"}, "next");
4578                 print "</div>\n";
4579         }
4580         git_footer_html();
4581 }
4582
4583 sub git_commit {
4584         $hash ||= $hash_base || "HEAD";
4585         my %co = parse_commit($hash);
4586         if (!%co) {
4587                 die_error(undef, "Unknown commit object");
4588         }
4589         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4590         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4591
4592         my $parent  = $co{'parent'};
4593         my $parents = $co{'parents'}; # listref
4594
4595         # we need to prepare $formats_nav before any parameter munging
4596         my $formats_nav;
4597         if (!defined $parent) {
4598                 # --root commitdiff
4599                 $formats_nav .= '(initial)';
4600         } elsif (@$parents == 1) {
4601                 # single parent commit
4602                 $formats_nav .=
4603                         '(parent: ' .
4604                         $cgi->a({-href => href(action=>"commit",
4605                                                hash=>$parent)},
4606                                 esc_html(substr($parent, 0, 7))) .
4607                         ')';
4608         } else {
4609                 # merge commit
4610                 $formats_nav .=
4611                         '(merge: ' .
4612                         join(' ', map {
4613                                 $cgi->a({-href => href(action=>"commit",
4614                                                        hash=>$_)},
4615                                         esc_html(substr($_, 0, 7)));
4616                         } @$parents ) .
4617                         ')';
4618         }
4619
4620         if (!defined $parent) {
4621                 $parent = "--root";
4622         }
4623         my @difftree;
4624         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4625                 @diff_opts,
4626                 (@$parents <= 1 ? $parent : '-c'),
4627                 $hash, "--"
4628                 or die_error(undef, "Open git-diff-tree failed");
4629         @difftree = map { chomp; $_ } <$fd>;
4630         close $fd or die_error(undef, "Reading git-diff-tree failed");
4631
4632         # non-textual hash id's can be cached
4633         my $expires;
4634         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4635                 $expires = "+1d";
4636         }
4637         my $refs = git_get_references();
4638         my $ref = format_ref_marker($refs, $co{'id'});
4639
4640         git_header_html(undef, $expires);
4641         git_print_page_nav('commit', '',
4642                            $hash, $co{'tree'}, $hash,
4643                            $formats_nav);
4644
4645         if (defined $co{'parent'}) {
4646                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4647         } else {
4648                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4649         }
4650         print "<div class=\"title_text\">\n" .
4651               "<table class=\"object_header\">\n";
4652         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4653               "<tr>" .
4654               "<td></td><td> $ad{'rfc2822'}";
4655         if ($ad{'hour_local'} < 6) {
4656                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4657                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4658         } else {
4659                 printf(" (%02d:%02d %s)",
4660                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4661         }
4662         print "</td>" .
4663               "</tr>\n";
4664         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4665         print "<tr><td></td><td> $cd{'rfc2822'}" .
4666               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4667               "</td></tr>\n";
4668         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4669         print "<tr>" .
4670               "<td>tree</td>" .
4671               "<td class=\"sha1\">" .
4672               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4673                        class => "list"}, $co{'tree'}) .
4674               "</td>" .
4675               "<td class=\"link\">" .
4676               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4677                       "tree");
4678         my $snapshot_links = format_snapshot_links($hash);
4679         if (defined $snapshot_links) {
4680                 print " | " . $snapshot_links;
4681         }
4682         print "</td>" .
4683               "</tr>\n";
4684
4685         foreach my $par (@$parents) {
4686                 print "<tr>" .
4687                       "<td>parent</td>" .
4688                       "<td class=\"sha1\">" .
4689                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4690                                class => "list"}, $par) .
4691                       "</td>" .
4692                       "<td class=\"link\">" .
4693                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4694                       " | " .
4695                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4696                       "</td>" .
4697                       "</tr>\n";
4698         }
4699         print "</table>".
4700               "</div>\n";
4701
4702         print "<div class=\"page_body\">\n";
4703         git_print_log($co{'comment'});
4704         print "</div>\n";
4705
4706         git_difftree_body(\@difftree, $hash, @$parents);
4707
4708         git_footer_html();
4709 }
4710
4711 sub git_object {
4712         # object is defined by:
4713         # - hash or hash_base alone
4714         # - hash_base and file_name
4715         my $type;
4716
4717         # - hash or hash_base alone
4718         if ($hash || ($hash_base && !defined $file_name)) {
4719                 my $object_id = $hash || $hash_base;
4720
4721                 my $git_command = git_cmd_str();
4722                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4723                         or die_error('404 Not Found', "Object does not exist");
4724                 $type = <$fd>;
4725                 chomp $type;
4726                 close $fd
4727                         or die_error('404 Not Found', "Object does not exist");
4728
4729         # - hash_base and file_name
4730         } elsif ($hash_base && defined $file_name) {
4731                 $file_name =~ s,/+$,,;
4732
4733                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4734                         or die_error('404 Not Found', "Base object does not exist");
4735
4736                 # here errors should not hapen
4737                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4738                         or die_error(undef, "Open git-ls-tree failed");
4739                 my $line = <$fd>;
4740                 close $fd;
4741
4742                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4743                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4744                         die_error('404 Not Found', "File or directory for given base does not exist");
4745                 }
4746                 $type = $2;
4747                 $hash = $3;
4748         } else {
4749                 die_error('404 Not Found', "Not enough information to find object");
4750         }
4751
4752         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4753                                           hash=>$hash, hash_base=>$hash_base,
4754                                           file_name=>$file_name),
4755                              -status => '302 Found');
4756 }
4757
4758 sub git_blobdiff {
4759         my $format = shift || 'html';
4760
4761         my $fd;
4762         my @difftree;
4763         my %diffinfo;
4764         my $expires;
4765
4766         # preparing $fd and %diffinfo for git_patchset_body
4767         # new style URI
4768         if (defined $hash_base && defined $hash_parent_base) {
4769                 if (defined $file_name) {
4770                         # read raw output
4771                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4772                                 $hash_parent_base, $hash_base,
4773                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4774                                 or die_error(undef, "Open git-diff-tree failed");
4775                         @difftree = map { chomp; $_ } <$fd>;
4776                         close $fd
4777                                 or die_error(undef, "Reading git-diff-tree failed");
4778                         @difftree
4779                                 or die_error('404 Not Found', "Blob diff not found");
4780
4781                 } elsif (defined $hash &&
4782                          $hash =~ /[0-9a-fA-F]{40}/) {
4783                         # try to find filename from $hash
4784
4785                         # read filtered raw output
4786                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4787                                 $hash_parent_base, $hash_base, "--"
4788                                 or die_error(undef, "Open git-diff-tree failed");
4789                         @difftree =
4790                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4791                                 # $hash == to_id
4792                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4793                                 map { chomp; $_ } <$fd>;
4794                         close $fd
4795                                 or die_error(undef, "Reading git-diff-tree failed");
4796                         @difftree
4797                                 or die_error('404 Not Found', "Blob diff not found");
4798
4799                 } else {
4800                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4801                 }
4802
4803                 if (@difftree > 1) {
4804                         die_error('404 Not Found', "Ambiguous blob diff specification");
4805                 }
4806
4807                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4808                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4809                 $file_name   ||= $diffinfo{'to_file'};
4810
4811                 $hash_parent ||= $diffinfo{'from_id'};
4812                 $hash        ||= $diffinfo{'to_id'};
4813
4814                 # non-textual hash id's can be cached
4815                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4816                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4817                         $expires = '+1d';
4818                 }
4819
4820                 # open patch output
4821                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4822                         '-p', ($format eq 'html' ? "--full-index" : ()),
4823                         $hash_parent_base, $hash_base,
4824                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4825                         or die_error(undef, "Open git-diff-tree failed");
4826         }
4827
4828         # old/legacy style URI
4829         if (!%diffinfo && # if new style URI failed
4830             defined $hash && defined $hash_parent) {
4831                 # fake git-diff-tree raw output
4832                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4833                 $diffinfo{'from_id'} = $hash_parent;
4834                 $diffinfo{'to_id'}   = $hash;
4835                 if (defined $file_name) {
4836                         if (defined $file_parent) {
4837                                 $diffinfo{'status'} = '2';
4838                                 $diffinfo{'from_file'} = $file_parent;
4839                                 $diffinfo{'to_file'}   = $file_name;
4840                         } else { # assume not renamed
4841                                 $diffinfo{'status'} = '1';
4842                                 $diffinfo{'from_file'} = $file_name;
4843                                 $diffinfo{'to_file'}   = $file_name;
4844                         }
4845                 } else { # no filename given
4846                         $diffinfo{'status'} = '2';
4847                         $diffinfo{'from_file'} = $hash_parent;
4848                         $diffinfo{'to_file'}   = $hash;
4849                 }
4850
4851                 # non-textual hash id's can be cached
4852                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4853                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4854                         $expires = '+1d';
4855                 }
4856
4857                 # open patch output
4858                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4859                         '-p', ($format eq 'html' ? "--full-index" : ()),
4860                         $hash_parent, $hash, "--"
4861                         or die_error(undef, "Open git-diff failed");
4862         } else  {
4863                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4864                         unless %diffinfo;
4865         }
4866
4867         # header
4868         if ($format eq 'html') {
4869                 my $formats_nav =
4870                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4871                                 "raw");
4872                 git_header_html(undef, $expires);
4873                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4874                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4875                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4876                 } else {
4877                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4878                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4879                 }
4880                 if (defined $file_name) {
4881                         git_print_page_path($file_name, "blob", $hash_base);
4882                 } else {
4883                         print "<div class=\"page_path\"></div>\n";
4884                 }
4885
4886         } elsif ($format eq 'plain') {
4887                 print $cgi->header(
4888                         -type => 'text/plain',
4889                         -charset => 'utf-8',
4890                         -expires => $expires,
4891                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4892
4893                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4894
4895         } else {
4896                 die_error(undef, "Unknown blobdiff format");
4897         }
4898
4899         # patch
4900         if ($format eq 'html') {
4901                 print "<div class=\"page_body\">\n";
4902
4903                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4904                 close $fd;
4905
4906                 print "</div>\n"; # class="page_body"
4907                 git_footer_html();
4908
4909         } else {
4910                 while (my $line = <$fd>) {
4911                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4912                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4913
4914                         print $line;
4915
4916                         last if $line =~ m!^\+\+\+!;
4917                 }
4918                 local $/ = undef;
4919                 print <$fd>;
4920                 close $fd;
4921         }
4922 }
4923
4924 sub git_blobdiff_plain {
4925         git_blobdiff('plain');
4926 }
4927
4928 sub git_commitdiff {
4929         my $format = shift || 'html';
4930         $hash ||= $hash_base || "HEAD";
4931         my %co = parse_commit($hash);
4932         if (!%co) {
4933                 die_error(undef, "Unknown commit object");
4934         }
4935
4936         # choose format for commitdiff for merge
4937         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4938                 $hash_parent = '--cc';
4939         }
4940         # we need to prepare $formats_nav before almost any parameter munging
4941         my $formats_nav;
4942         if ($format eq 'html') {
4943                 $formats_nav =
4944                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4945                                 "raw");
4946
4947                 if (defined $hash_parent &&
4948                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4949                         # commitdiff with two commits given
4950                         my $hash_parent_short = $hash_parent;
4951                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4952                                 $hash_parent_short = substr($hash_parent, 0, 7);
4953                         }
4954                         $formats_nav .=
4955                                 ' (from';
4956                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4957                                 if ($co{'parents'}[$i] eq $hash_parent) {
4958                                         $formats_nav .= ' parent ' . ($i+1);
4959                                         last;
4960                                 }
4961                         }
4962                         $formats_nav .= ': ' .
4963                                 $cgi->a({-href => href(action=>"commitdiff",
4964                                                        hash=>$hash_parent)},
4965                                         esc_html($hash_parent_short)) .
4966                                 ')';
4967                 } elsif (!$co{'parent'}) {
4968                         # --root commitdiff
4969                         $formats_nav .= ' (initial)';
4970                 } elsif (scalar @{$co{'parents'}} == 1) {
4971                         # single parent commit
4972                         $formats_nav .=
4973                                 ' (parent: ' .
4974                                 $cgi->a({-href => href(action=>"commitdiff",
4975                                                        hash=>$co{'parent'})},
4976                                         esc_html(substr($co{'parent'}, 0, 7))) .
4977                                 ')';
4978                 } else {
4979                         # merge commit
4980                         if ($hash_parent eq '--cc') {
4981                                 $formats_nav .= ' | ' .
4982                                         $cgi->a({-href => href(action=>"commitdiff",
4983                                                                hash=>$hash, hash_parent=>'-c')},
4984                                                 'combined');
4985                         } else { # $hash_parent eq '-c'
4986                                 $formats_nav .= ' | ' .
4987                                         $cgi->a({-href => href(action=>"commitdiff",
4988                                                                hash=>$hash, hash_parent=>'--cc')},
4989                                                 'compact');
4990                         }
4991                         $formats_nav .=
4992                                 ' (merge: ' .
4993                                 join(' ', map {
4994                                         $cgi->a({-href => href(action=>"commitdiff",
4995                                                                hash=>$_)},
4996                                                 esc_html(substr($_, 0, 7)));
4997                                 } @{$co{'parents'}} ) .
4998                                 ')';
4999                 }
5000         }
5001
5002         my $hash_parent_param = $hash_parent;
5003         if (!defined $hash_parent_param) {
5004                 # --cc for multiple parents, --root for parentless
5005                 $hash_parent_param =
5006                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5007         }
5008
5009         # read commitdiff
5010         my $fd;
5011         my @difftree;
5012         if ($format eq 'html') {
5013                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5014                         "--no-commit-id", "--patch-with-raw", "--full-index",
5015                         $hash_parent_param, $hash, "--"
5016                         or die_error(undef, "Open git-diff-tree failed");
5017
5018                 while (my $line = <$fd>) {
5019                         chomp $line;
5020                         # empty line ends raw part of diff-tree output
5021                         last unless $line;
5022                         push @difftree, scalar parse_difftree_raw_line($line);
5023                 }
5024
5025         } elsif ($format eq 'plain') {
5026                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5027                         '-p', $hash_parent_param, $hash, "--"
5028                         or die_error(undef, "Open git-diff-tree failed");
5029
5030         } else {
5031                 die_error(undef, "Unknown commitdiff format");
5032         }
5033
5034         # non-textual hash id's can be cached
5035         my $expires;
5036         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5037                 $expires = "+1d";
5038         }
5039
5040         # write commit message
5041         if ($format eq 'html') {
5042                 my $refs = git_get_references();
5043                 my $ref = format_ref_marker($refs, $co{'id'});
5044
5045                 git_header_html(undef, $expires);
5046                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5047                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5048                 git_print_authorship(\%co);
5049                 print "<div class=\"page_body\">\n";
5050                 if (@{$co{'comment'}} > 1) {
5051                         print "<div class=\"log\">\n";
5052                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5053                         print "</div>\n"; # class="log"
5054                 }
5055
5056         } elsif ($format eq 'plain') {
5057                 my $refs = git_get_references("tags");
5058                 my $tagname = git_get_rev_name_tags($hash);
5059                 my $filename = basename($project) . "-$hash.patch";
5060
5061                 print $cgi->header(
5062                         -type => 'text/plain',
5063                         -charset => 'utf-8',
5064                         -expires => $expires,
5065                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5066                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5067                 print "From: " . to_utf8($co{'author'}) . "\n";
5068                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5069                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5070
5071                 print "X-Git-Tag: $tagname\n" if $tagname;
5072                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5073
5074                 foreach my $line (@{$co{'comment'}}) {
5075                         print to_utf8($line) . "\n";
5076                 }
5077                 print "---\n\n";
5078         }
5079
5080         # write patch
5081         if ($format eq 'html') {
5082                 my $use_parents = !defined $hash_parent ||
5083                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5084                 git_difftree_body(\@difftree, $hash,
5085                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5086                 print "<br/>\n";
5087
5088                 git_patchset_body($fd, \@difftree, $hash,
5089                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5090                 close $fd;
5091                 print "</div>\n"; # class="page_body"
5092                 git_footer_html();
5093
5094         } elsif ($format eq 'plain') {
5095                 local $/ = undef;
5096                 print <$fd>;
5097                 close $fd
5098                         or print "Reading git-diff-tree failed\n";
5099         }
5100 }
5101
5102 sub git_commitdiff_plain {
5103         git_commitdiff('plain');
5104 }
5105
5106 sub git_history {
5107         if (!defined $hash_base) {
5108                 $hash_base = git_get_head_hash($project);
5109         }
5110         if (!defined $page) {
5111                 $page = 0;
5112         }
5113         my $ftype;
5114         my %co = parse_commit($hash_base);
5115         if (!%co) {
5116                 die_error(undef, "Unknown commit object");
5117         }
5118
5119         my $refs = git_get_references();
5120         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5121
5122         if (!defined $hash && defined $file_name) {
5123                 $hash = git_get_hash_by_path($hash_base, $file_name);
5124         }
5125         if (defined $hash) {
5126                 $ftype = git_get_type($hash);
5127         }
5128
5129         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5130
5131         my $paging_nav = '';
5132         if ($page > 0) {
5133                 $paging_nav .=
5134                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5135                                                file_name=>$file_name)},
5136                                 "first");
5137                 $paging_nav .= " &sdot; " .
5138                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5139                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5140         } else {
5141                 $paging_nav .= "first";
5142                 $paging_nav .= " &sdot; prev";
5143         }
5144         my $next_link = '';
5145         if ($#commitlist >= 100) {
5146                 $next_link =
5147                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5148                                  -accesskey => "n", -title => "Alt-n"}, "next");
5149                 $paging_nav .= " &sdot; $next_link";
5150         } else {
5151                 $paging_nav .= " &sdot; next";
5152         }
5153
5154         git_header_html();
5155         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5156         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5157         git_print_page_path($file_name, $ftype, $hash_base);
5158
5159         git_history_body(\@commitlist, 0, 99,
5160                          $refs, $hash_base, $ftype, $next_link);
5161
5162         git_footer_html();
5163 }
5164
5165 sub git_search {
5166         my ($have_search) = gitweb_check_feature('search');
5167         if (!$have_search) {
5168                 die_error('403 Permission denied', "Permission denied");
5169         }
5170         if (!defined $searchtext) {
5171                 die_error(undef, "Text field empty");
5172         }
5173         if (!defined $hash) {
5174                 $hash = git_get_head_hash($project);
5175         }
5176         my %co = parse_commit($hash);
5177         if (!%co) {
5178                 die_error(undef, "Unknown commit object");
5179         }
5180         if (!defined $page) {
5181                 $page = 0;
5182         }
5183
5184         $searchtype ||= 'commit';
5185         if ($searchtype eq 'pickaxe') {
5186                 # pickaxe may take all resources of your box and run for several minutes
5187                 # with every query - so decide by yourself how public you make this feature
5188                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5189                 if (!$have_pickaxe) {
5190                         die_error('403 Permission denied', "Permission denied");
5191                 }
5192         }
5193         if ($searchtype eq 'grep') {
5194                 my ($have_grep) = gitweb_check_feature('grep');
5195                 if (!$have_grep) {
5196                         die_error('403 Permission denied', "Permission denied");
5197                 }
5198         }
5199
5200         git_header_html();
5201
5202         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5203                 my $greptype;
5204                 if ($searchtype eq 'commit') {
5205                         $greptype = "--grep=";
5206                 } elsif ($searchtype eq 'author') {
5207                         $greptype = "--author=";
5208                 } elsif ($searchtype eq 'committer') {
5209                         $greptype = "--committer=";
5210                 }
5211                 $greptype .= $search_regexp;
5212                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5213
5214                 my $paging_nav = '';
5215                 if ($page > 0) {
5216                         $paging_nav .=
5217                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5218                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5219                                         "first");
5220                         $paging_nav .= " &sdot; " .
5221                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5222                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5223                 } else {
5224                         $paging_nav .= "first";
5225                         $paging_nav .= " &sdot; prev";
5226                 }
5227                 my $next_link = '';
5228                 if ($#commitlist >= 100) {
5229                         $next_link =
5230                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5231                                          -accesskey => "n", -title => "Alt-n"}, "next");
5232                         $paging_nav .= " &sdot; $next_link";
5233                 } else {
5234                         $paging_nav .= " &sdot; next";
5235                 }
5236
5237                 if ($#commitlist >= 100) {
5238                 }
5239
5240                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5241                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5242                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5243         }
5244
5245         if ($searchtype eq 'pickaxe') {
5246                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5247                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5248
5249                 print "<table class=\"pickaxe search\">\n";
5250                 my $alternate = 1;
5251                 $/ = "\n";
5252                 my $git_command = git_cmd_str();
5253                 my $searchqtext = $searchtext;
5254                 $searchqtext =~ s/'/'\\''/;
5255                 open my $fd, "-|", "$git_command rev-list $hash | " .
5256                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5257                 undef %co;
5258                 my @files;
5259                 while (my $line = <$fd>) {
5260                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5261                                 my %set;
5262                                 $set{'file'} = $6;
5263                                 $set{'from_id'} = $3;
5264                                 $set{'to_id'} = $4;
5265                                 $set{'id'} = $set{'to_id'};
5266                                 if ($set{'id'} =~ m/0{40}/) {
5267                                         $set{'id'} = $set{'from_id'};
5268                                 }
5269                                 if ($set{'id'} =~ m/0{40}/) {
5270                                         next;
5271                                 }
5272                                 push @files, \%set;
5273                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5274                                 if (%co) {
5275                                         if ($alternate) {
5276                                                 print "<tr class=\"dark\">\n";
5277                                         } else {
5278                                                 print "<tr class=\"light\">\n";
5279                                         }
5280                                         $alternate ^= 1;
5281                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5282                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5283                                               "<td><i>" . $author . "</i></td>\n" .
5284                                               "<td>" .
5285                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5286                                                       -class => "list subject"},
5287                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5288                                         while (my $setref = shift @files) {
5289                                                 my %set = %$setref;
5290                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5291                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5292                                                               -class => "list"},
5293                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5294                                                       "<br/>\n";
5295                                         }
5296                                         print "</td>\n" .
5297                                               "<td class=\"link\">" .
5298                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5299                                               " | " .
5300                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5301                                         print "</td>\n" .
5302                                               "</tr>\n";
5303                                 }
5304                                 %co = parse_commit($1);
5305                         }
5306                 }
5307                 close $fd;
5308
5309                 print "</table>\n";
5310         }
5311
5312         if ($searchtype eq 'grep') {
5313                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5314                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5315
5316                 print "<table class=\"grep_search\">\n";
5317                 my $alternate = 1;
5318                 my $matches = 0;
5319                 $/ = "\n";
5320                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5321                 my $lastfile = '';
5322                 while (my $line = <$fd>) {
5323                         chomp $line;
5324                         my ($file, $lno, $ltext, $binary);
5325                         last if ($matches++ > 1000);
5326                         if ($line =~ /^Binary file (.+) matches$/) {
5327                                 $file = $1;
5328                                 $binary = 1;
5329                         } else {
5330                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5331                         }
5332                         if ($file ne $lastfile) {
5333                                 $lastfile and print "</td></tr>\n";
5334                                 if ($alternate++) {
5335                                         print "<tr class=\"dark\">\n";
5336                                 } else {
5337                                         print "<tr class=\"light\">\n";
5338                                 }
5339                                 print "<td class=\"list\">".
5340                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5341                                                                file_name=>"$file"),
5342                                                 -class => "list"}, esc_path($file));
5343                                 print "</td><td>\n";
5344                                 $lastfile = $file;
5345                         }
5346                         if ($binary) {
5347                                 print "<div class=\"binary\">Binary file</div>\n";
5348                         } else {
5349                                 $ltext = untabify($ltext);
5350                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5351                                         $ltext = esc_html($1, -nbsp=>1);
5352                                         $ltext .= '<span class="match">';
5353                                         $ltext .= esc_html($2, -nbsp=>1);
5354                                         $ltext .= '</span>';
5355                                         $ltext .= esc_html($3, -nbsp=>1);
5356                                 } else {
5357                                         $ltext = esc_html($ltext, -nbsp=>1);
5358                                 }
5359                                 print "<div class=\"pre\">" .
5360                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5361                                                                file_name=>"$file").'#l'.$lno,
5362                                                 -class => "linenr"}, sprintf('%4i', $lno))
5363                                         . ' ' .  $ltext . "</div>\n";
5364                         }
5365                 }
5366                 if ($lastfile) {
5367                         print "</td></tr>\n";
5368                         if ($matches > 1000) {
5369                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5370                         }
5371                 } else {
5372                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5373                 }
5374                 close $fd;
5375
5376                 print "</table>\n";
5377         }
5378         git_footer_html();
5379 }
5380
5381 sub git_search_help {
5382         git_header_html();
5383         git_print_page_nav('','', $hash,$hash,$hash);
5384         print <<EOT;
5385 <dl>
5386 <dt><b>commit</b></dt>
5387 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5388 EOT
5389         my ($have_grep) = gitweb_check_feature('grep');
5390         if ($have_grep) {
5391                 print <<EOT;
5392 <dt><b>grep</b></dt>
5393 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5394     a different one) are searched for the given
5395 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5396 (POSIX extended) and the matches are listed. On large
5397 trees, this search can take a while and put some strain on the server, so please use it with
5398 some consideration.</dd>
5399 EOT
5400         }
5401         print <<EOT;
5402 <dt><b>author</b></dt>
5403 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5404 <dt><b>committer</b></dt>
5405 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5406 EOT
5407         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5408         if ($have_pickaxe) {
5409                 print <<EOT;
5410 <dt><b>pickaxe</b></dt>
5411 <dd>All commits that caused the string to appear or disappear from any file (changes that
5412 added, removed or "modified" the string) will be listed. This search can take a while and
5413 takes a lot of strain on the server, so please use it wisely.</dd>
5414 EOT
5415         }
5416         print "</dl>\n";
5417         git_footer_html();
5418 }
5419
5420 sub git_shortlog {
5421         my $head = git_get_head_hash($project);
5422         if (!defined $hash) {
5423                 $hash = $head;
5424         }
5425         if (!defined $page) {
5426                 $page = 0;
5427         }
5428         my $refs = git_get_references();
5429
5430         my @commitlist = parse_commits($hash, 101, (100 * $page));
5431
5432         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5433         my $next_link = '';
5434         if ($#commitlist >= 100) {
5435                 $next_link =
5436                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5437                                  -accesskey => "n", -title => "Alt-n"}, "next");
5438         }
5439
5440         git_header_html();
5441         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5442         git_print_header_div('summary', $project);
5443
5444         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5445
5446         git_footer_html();
5447 }
5448
5449 ## ......................................................................
5450 ## feeds (RSS, Atom; OPML)
5451
5452 sub git_feed {
5453         my $format = shift || 'atom';
5454         my ($have_blame) = gitweb_check_feature('blame');
5455
5456         # Atom: http://www.atomenabled.org/developers/syndication/
5457         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5458         if ($format ne 'rss' && $format ne 'atom') {
5459                 die_error(undef, "Unknown web feed format");
5460         }
5461
5462         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5463         my $head = $hash || 'HEAD';
5464         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5465
5466         my %latest_commit;
5467         my %latest_date;
5468         my $content_type = "application/$format+xml";
5469         if (defined $cgi->http('HTTP_ACCEPT') &&
5470                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5471                 # browser (feed reader) prefers text/xml
5472                 $content_type = 'text/xml';
5473         }
5474         if (defined($commitlist[0])) {
5475                 %latest_commit = %{$commitlist[0]};
5476                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5477                 print $cgi->header(
5478                         -type => $content_type,
5479                         -charset => 'utf-8',
5480                         -last_modified => $latest_date{'rfc2822'});
5481         } else {
5482                 print $cgi->header(
5483                         -type => $content_type,
5484                         -charset => 'utf-8');
5485         }
5486
5487         # Optimization: skip generating the body if client asks only
5488         # for Last-Modified date.
5489         return if ($cgi->request_method() eq 'HEAD');
5490
5491         # header variables
5492         my $title = "$site_name - $project/$action";
5493         my $feed_type = 'log';
5494         if (defined $hash) {
5495                 $title .= " - '$hash'";
5496                 $feed_type = 'branch log';
5497                 if (defined $file_name) {
5498                         $title .= " :: $file_name";
5499                         $feed_type = 'history';
5500                 }
5501         } elsif (defined $file_name) {
5502                 $title .= " - $file_name";
5503                 $feed_type = 'history';
5504         }
5505         $title .= " $feed_type";
5506         my $descr = git_get_project_description($project);
5507         if (defined $descr) {
5508                 $descr = esc_html($descr);
5509         } else {
5510                 $descr = "$project " .
5511                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5512                          " feed";
5513         }
5514         my $owner = git_get_project_owner($project);
5515         $owner = esc_html($owner);
5516
5517         #header
5518         my $alt_url;
5519         if (defined $file_name) {
5520                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5521         } elsif (defined $hash) {
5522                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5523         } else {
5524                 $alt_url = href(-full=>1, action=>"summary");
5525         }
5526         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5527         if ($format eq 'rss') {
5528                 print <<XML;
5529 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5530 <channel>
5531 XML
5532                 print "<title>$title</title>\n" .
5533                       "<link>$alt_url</link>\n" .
5534                       "<description>$descr</description>\n" .
5535                       "<language>en</language>\n";
5536         } elsif ($format eq 'atom') {
5537                 print <<XML;
5538 <feed xmlns="http://www.w3.org/2005/Atom">
5539 XML
5540                 print "<title>$title</title>\n" .
5541                       "<subtitle>$descr</subtitle>\n" .
5542                       '<link rel="alternate" type="text/html" href="' .
5543                       $alt_url . '" />' . "\n" .
5544                       '<link rel="self" type="' . $content_type . '" href="' .
5545                       $cgi->self_url() . '" />' . "\n" .
5546                       "<id>" . href(-full=>1) . "</id>\n" .
5547                       # use project owner for feed author
5548                       "<author><name>$owner</name></author>\n";
5549                 if (defined $favicon) {
5550                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5551                 }
5552                 if (defined $logo_url) {
5553                         # not twice as wide as tall: 72 x 27 pixels
5554                         print "<logo>" . esc_url($logo) . "</logo>\n";
5555                 }
5556                 if (! %latest_date) {
5557                         # dummy date to keep the feed valid until commits trickle in:
5558                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5559                 } else {
5560                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5561                 }
5562         }
5563
5564         # contents
5565         for (my $i = 0; $i <= $#commitlist; $i++) {
5566                 my %co = %{$commitlist[$i]};
5567                 my $commit = $co{'id'};
5568                 # we read 150, we always show 30 and the ones more recent than 48 hours
5569                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5570                         last;
5571                 }
5572                 my %cd = parse_date($co{'author_epoch'});
5573
5574                 # get list of changed files
5575                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5576                         $co{'parent'} || "--root",
5577                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5578                         or next;
5579                 my @difftree = map { chomp; $_ } <$fd>;
5580                 close $fd
5581                         or next;
5582
5583                 # print element (entry, item)
5584                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5585                 if ($format eq 'rss') {
5586                         print "<item>\n" .
5587                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5588                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5589                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5590                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5591                               "<link>$co_url</link>\n" .
5592                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5593                               "<content:encoded>" .
5594                               "<![CDATA[\n";
5595                 } elsif ($format eq 'atom') {
5596                         print "<entry>\n" .
5597                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5598                               "<updated>$cd{'iso-8601'}</updated>\n" .
5599                               "<author>\n" .
5600                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5601                         if ($co{'author_email'}) {
5602                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5603                         }
5604                         print "</author>\n" .
5605                               # use committer for contributor
5606                               "<contributor>\n" .
5607                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5608                         if ($co{'committer_email'}) {
5609                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5610                         }
5611                         print "</contributor>\n" .
5612                               "<published>$cd{'iso-8601'}</published>\n" .
5613                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5614                               "<id>$co_url</id>\n" .
5615                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5616                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5617                 }
5618                 my $comment = $co{'comment'};
5619                 print "<pre>\n";
5620                 foreach my $line (@$comment) {
5621                         $line = esc_html($line);
5622                         print "$line\n";
5623                 }
5624                 print "</pre><ul>\n";
5625                 foreach my $difftree_line (@difftree) {
5626                         my %difftree = parse_difftree_raw_line($difftree_line);
5627                         next if !$difftree{'from_id'};
5628
5629                         my $file = $difftree{'file'} || $difftree{'to_file'};
5630
5631                         print "<li>" .
5632                               "[" .
5633                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5634                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5635                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5636                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5637                                       -title => "diff"}, 'D');
5638                         if ($have_blame) {
5639                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5640                                                              file_name=>$file, hash_base=>$commit),
5641                                               -title => "blame"}, 'B');
5642                         }
5643                         # if this is not a feed of a file history
5644                         if (!defined $file_name || $file_name ne $file) {
5645                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5646                                                              file_name=>$file, hash=>$commit),
5647                                               -title => "history"}, 'H');
5648                         }
5649                         $file = esc_path($file);
5650                         print "] ".
5651                               "$file</li>\n";
5652                 }
5653                 if ($format eq 'rss') {
5654                         print "</ul>]]>\n" .
5655                               "</content:encoded>\n" .
5656                               "</item>\n";
5657                 } elsif ($format eq 'atom') {
5658                         print "</ul>\n</div>\n" .
5659                               "</content>\n" .
5660                               "</entry>\n";
5661                 }
5662         }
5663
5664         # end of feed
5665         if ($format eq 'rss') {
5666                 print "</channel>\n</rss>\n";
5667         }       elsif ($format eq 'atom') {
5668                 print "</feed>\n";
5669         }
5670 }
5671
5672 sub git_rss {
5673         git_feed('rss');
5674 }
5675
5676 sub git_atom {
5677         git_feed('atom');
5678 }
5679
5680 sub git_opml {
5681         my @list = git_get_projects_list();
5682
5683         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5684         print <<XML;
5685 <?xml version="1.0" encoding="utf-8"?>
5686 <opml version="1.0">
5687 <head>
5688   <title>$site_name OPML Export</title>
5689 </head>
5690 <body>
5691 <outline text="git RSS feeds">
5692 XML
5693
5694         foreach my $pr (@list) {
5695                 my %proj = %$pr;
5696                 my $head = git_get_head_hash($proj{'path'});
5697                 if (!defined $head) {
5698                         next;
5699                 }
5700                 $git_dir = "$projectroot/$proj{'path'}";
5701                 my %co = parse_commit($head);
5702                 if (!%co) {
5703                         next;
5704                 }
5705
5706                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5707                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5708                 my $html = "$my_url?p=$proj{'path'};a=summary";
5709                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5710         }
5711         print <<XML;
5712 </outline>
5713 </body>
5714 </opml>
5715 XML
5716 }