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