gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 373
 374 # version of the core git binary
 375 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 376
 377 $projects_list ||= $projectroot;
 378
 379 # ======================================================================
 380 # input validation and dispatch
 381 our $action = $cgi->param('a');
 382 if (defined $action) {
 383         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 384                 die_error(undef, "Invalid action parameter");
 385         }
 386 }
 387
 388 # parameters which are pathnames
 389 our $project = $cgi->param('p');
 390 if (defined $project) {
 391         if (!validate_pathname($project) ||
 392             !(-d "$projectroot/$project") ||
 393             !check_head_link("$projectroot/$project") ||
 394             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 395             ($strict_export && !project_in_list($project))) {
 396                 undef $project;
 397                 die_error(undef, "No such project");
 398         }
 399 }
 400
 401 our $file_name = $cgi->param('f');
 402 if (defined $file_name) {
 403         if (!validate_pathname($file_name)) {
 404                 die_error(undef, "Invalid file parameter");
 405         }
 406 }
 407
 408 our $file_parent = $cgi->param('fp');
 409 if (defined $file_parent) {
 410         if (!validate_pathname($file_parent)) {
 411                 die_error(undef, "Invalid file parent parameter");
 412         }
 413 }
 414
 415 # parameters which are refnames
 416 our $hash = $cgi->param('h');
 417 if (defined $hash) {
 418         if (!validate_refname($hash)) {
 419                 die_error(undef, "Invalid hash parameter");
 420         }
 421 }
 422
 423 our $hash_parent = $cgi->param('hp');
 424 if (defined $hash_parent) {
 425         if (!validate_refname($hash_parent)) {
 426                 die_error(undef, "Invalid hash parent parameter");
 427         }
 428 }
 429
 430 our $hash_base = $cgi->param('hb');
 431 if (defined $hash_base) {
 432         if (!validate_refname($hash_base)) {
 433                 die_error(undef, "Invalid hash base parameter");
 434         }
 435 }
 436
 437 my %allowed_options = (
 438         "--no-merges" => [ qw(rss atom log shortlog history) ],
 439 );
 440
 441 our @extra_options = $cgi->param('opt');
 442 if (defined @extra_options) {
 443         foreach my $opt (@extra_options) {
 444                 if (not exists $allowed_options{$opt}) {
 445                         die_error(undef, "Invalid option parameter");
 446                 }
 447                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 448                         die_error(undef, "Invalid option parameter for this action");
 449                 }
 450         }
 451 }
 452
 453 our $hash_parent_base = $cgi->param('hpb');
 454 if (defined $hash_parent_base) {
 455         if (!validate_refname($hash_parent_base)) {
 456                 die_error(undef, "Invalid hash parent base parameter");
 457         }
 458 }
 459
 460 # other parameters
 461 our $page = $cgi->param('pg');
 462 if (defined $page) {
 463         if ($page =~ m/[^0-9]/) {
 464                 die_error(undef, "Invalid page parameter");
 465         }
 466 }
 467
 468 our $searchtype = $cgi->param('st');
 469 if (defined $searchtype) {
 470         if ($searchtype =~ m/[^a-z]/) {
 471                 die_error(undef, "Invalid searchtype parameter");
 472         }
 473 }
 474
 475 our $searchtext = $cgi->param('s');
 476 our $search_regexp;
 477 if (defined $searchtext) {
 478         if (length($searchtext) < 2) {
 479                 die_error(undef, "At least two characters are required for search parameter");
 480         }
 481         $search_regexp = quotemeta $searchtext;
 482 }
 483
 484 # now read PATH_INFO and use it as alternative to parameters
 485 sub evaluate_path_info {
 486         return if defined $project;
 487         my $path_info = $ENV{"PATH_INFO"};
 488         return if !$path_info;
 489         $path_info =~ s,^/+,,;
 490         return if !$path_info;
 491         # find which part of PATH_INFO is project
 492         $project = $path_info;
 493         $project =~ s,/+$,,;
 494         while ($project && !check_head_link("$projectroot/$project")) {
 495                 $project =~ s,/*[^/]*$,,;
 496         }
 497         # validate project
 498         $project = validate_pathname($project);
 499         if (!$project ||
 500             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 501             ($strict_export && !project_in_list($project))) {
 502                 undef $project;
 503                 return;
 504         }
 505         # do not change any parameters if an action is given using the query string
 506         return if $action;
 507         $path_info =~ s,^$project/*,,;
 508         my ($refname, $pathname) = split(/:/, $path_info, 2);
 509         if (defined $pathname) {
 510                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 511                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 512                 $pathname =~ s,^/+,,;
 513                 if (!$pathname || substr($pathname, -1) eq "/") {
 514                         $action  ||= "tree";
 515                         $pathname =~ s,/$,,;
 516                 } else {
 517                         $action  ||= "blob_plain";
 518                 }
 519                 $hash_base ||= validate_refname($refname);
 520                 $file_name ||= validate_pathname($pathname);
 521         } elsif (defined $refname) {
 522                 # we got "project.git/branch"
 523                 $action ||= "shortlog";
 524                 $hash   ||= validate_refname($refname);
 525         }
 526 }
 527 evaluate_path_info();
 528
 529 # path to the current git repository
 530 our $git_dir;
 531 $git_dir = "$projectroot/$project" if $project;
 532
 533 # dispatch
 534 my %actions = (
 535         "blame" => \&git_blame2,
 536         "blobdiff" => \&git_blobdiff,
 537         "blobdiff_plain" => \&git_blobdiff_plain,
 538         "blob" => \&git_blob,
 539         "blob_plain" => \&git_blob_plain,
 540         "commitdiff" => \&git_commitdiff,
 541         "commitdiff_plain" => \&git_commitdiff_plain,
 542         "commit" => \&git_commit,
 543         "forks" => \&git_forks,
 544         "heads" => \&git_heads,
 545         "history" => \&git_history,
 546         "log" => \&git_log,
 547         "rss" => \&git_rss,
 548         "atom" => \&git_atom,
 549         "search" => \&git_search,
 550         "search_help" => \&git_search_help,
 551         "shortlog" => \&git_shortlog,
 552         "summary" => \&git_summary,
 553         "tag" => \&git_tag,
 554         "tags" => \&git_tags,
 555         "tree" => \&git_tree,
 556         "snapshot" => \&git_snapshot,
 557         "object" => \&git_object,
 558         # those below don't need $project
 559         "opml" => \&git_opml,
 560         "project_list" => \&git_project_list,
 561         "project_index" => \&git_project_index,
 562 );
 563
 564 if (!defined $action) {
 565         if (defined $hash) {
 566                 $action = git_get_type($hash);
 567         } elsif (defined $hash_base && defined $file_name) {
 568                 $action = git_get_type("$hash_base:$file_name");
 569         } elsif (defined $project) {
 570                 $action = 'summary';
 571         } else {
 572                 $action = 'project_list';
 573         }
 574 }
 575 if (!defined($actions{$action})) {
 576         die_error(undef, "Unknown action");
 577 }
 578 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 579     !$project) {
 580         die_error(undef, "Project needed");
 581 }
 582 $actions{$action}->();
 583 exit;
 584
 585 ## ======================================================================
 586 ## action links
 587
 588 sub href(%) {
 589         my %params = @_;
 590         # default is to use -absolute url() i.e. $my_uri
 591         my $href = $params{-full} ? $my_url : $my_uri;
 592
 593         # XXX: Warning: If you touch this, check the search form for updating,
 594         # too.
 595
 596         my @mapping = (
 597                 project => "p",
 598                 action => "a",
 599                 file_name => "f",
 600                 file_parent => "fp",
 601                 hash => "h",
 602                 hash_parent => "hp",
 603                 hash_base => "hb",
 604                 hash_parent_base => "hpb",
 605                 page => "pg",
 606                 order => "o",
 607                 searchtext => "s",
 608                 searchtype => "st",
 609                 snapshot_format => "sf",
 610                 extra_options => "opt",
 611         );
 612         my %mapping = @mapping;
 613
 614         if ($params{-replay}) {
 615                 while (my ($name, $symbol) = each %mapping) {
 616                         if (!exists $params{$name}) {
 617                                 # to allow for multivalued params we use arrayref form
 618                                 $params{$name} = [ $cgi->param($symbol) ];
 619                         }
 620                 }
 621         }
 622
 623         $params{'project'} = $project unless exists $params{'project'};
 624
 625         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 626         if ($use_pathinfo) {
 627                 # use PATH_INFO for project name
 628                 $href .= "/$params{'project'}" if defined $params{'project'};
 629                 delete $params{'project'};
 630
 631                 # Summary just uses the project path URL
 632                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 633                         delete $params{'action'};
 634                 }
 635         }
 636
 637         # now encode the parameters explicitly
 638         my @result = ();
 639         for (my $i = 0; $i < @mapping; $i += 2) {
 640                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 641                 if (defined $params{$name}) {
 642                         if (ref($params{$name}) eq "ARRAY") {
 643                                 foreach my $par (@{$params{$name}}) {
 644                                         push @result, $symbol . "=" . esc_param($par);
 645                                 }
 646                         } else {
 647                                 push @result, $symbol . "=" . esc_param($params{$name});
 648                         }
 649                 }
 650         }
 651         $href .= "?" . join(';', @result) if scalar @result;
 652
 653         return $href;
 654 }
 655
 656
 657 ## ======================================================================
 658 ## validation, quoting/unquoting and escaping
 659
 660 sub validate_pathname {
 661         my $input = shift || return undef;
 662
 663         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 664         # at the beginning, at the end, and between slashes.
 665         # also this catches doubled slashes
 666         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 667                 return undef;
 668         }
 669         # no null characters
 670         if ($input =~ m!\0!) {
 671                 return undef;
 672         }
 673         return $input;
 674 }
 675
 676 sub validate_refname {
 677         my $input = shift || return undef;
 678
 679         # textual hashes are O.K.
 680         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 681                 return $input;
 682         }
 683         # it must be correct pathname
 684         $input = validate_pathname($input)
 685                 or return undef;
 686         # restrictions on ref name according to git-check-ref-format
 687         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 688                 return undef;
 689         }
 690         return $input;
 691 }
 692
 693 # decode sequences of octets in utf8 into Perl's internal form,
 694 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 695 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 696 sub to_utf8 {
 697         my $str = shift;
 698         my $res;
 699         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 700         if (defined $res) {
 701                 return $res;
 702         } else {
 703                 return decode($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 : [ $val ];
1516 }
1517
1518 sub git_get_project_config {
1519         my ($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         open my $fd, "$projectroot/$path/description" or return undef;
1610         my $descr = <$fd>;
1611         close $fd;
1612         if (defined $descr) {
1613                 chomp $descr;
1614         }
1615         return $descr;
1616 }
1617
1618 sub git_get_project_url_list {
1619         my $path = shift;
1620
1621         open my $fd, "$projectroot/$path/cloneurl" or return;
1622         my @git_project_url_list = map { chomp; $_ } <$fd>;
1623         close $fd;
1624
1625         return wantarray ? @git_project_url_list : \@git_project_url_list;
1626 }
1627
1628 sub git_get_projects_list {
1629         my ($filter) = @_;
1630         my @list;
1631
1632         $filter ||= '';
1633         $filter =~ s/\.git$//;
1634
1635         my ($check_forks) = gitweb_check_feature('forks');
1636
1637         if (-d $projects_list) {
1638                 # search in directory
1639                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1640                 # remove the trailing "/"
1641                 $dir =~ s!/+$!!;
1642                 my $pfxlen = length("$dir");
1643                 my $pfxdepth = ($dir =~ tr!/!!);
1644
1645                 File::Find::find({
1646                         follow_fast => 1, # follow symbolic links
1647                         follow_skip => 2, # ignore duplicates
1648                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1649                         wanted => sub {
1650                                 # skip project-list toplevel, if we get it.
1651                                 return if (m!^[/.]$!);
1652                                 # only directories can be git repositories
1653                                 return unless (-d $_);
1654                                 # don't traverse too deep (Find is super slow on os x)
1655                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1656                                         $File::Find::prune = 1;
1657                                         return;
1658                                 }
1659
1660                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1661                                 # we check related file in $projectroot
1662                                 if ($check_forks and $subdir =~ m#/.#) {
1663                                         $File::Find::prune = 1;
1664                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1665                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1666                                         $File::Find::prune = 1;
1667                                 }
1668                         },
1669                 }, "$dir");
1670
1671         } elsif (-f $projects_list) {
1672                 # read from file(url-encoded):
1673                 # 'git%2Fgit.git Linus+Torvalds'
1674                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1675                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1676                 my %paths;
1677                 open my ($fd), $projects_list or return;
1678         PROJECT:
1679                 while (my $line = <$fd>) {
1680                         chomp $line;
1681                         my ($path, $owner) = split ' ', $line;
1682                         $path = unescape($path);
1683                         $owner = unescape($owner);
1684                         if (!defined $path) {
1685                                 next;
1686                         }
1687                         if ($filter ne '') {
1688                                 # looking for forks;
1689                                 my $pfx = substr($path, 0, length($filter));
1690                                 if ($pfx ne $filter) {
1691                                         next PROJECT;
1692                                 }
1693                                 my $sfx = substr($path, length($filter));
1694                                 if ($sfx !~ /^\/.*\.git$/) {
1695                                         next PROJECT;
1696                                 }
1697                         } elsif ($check_forks) {
1698                         PATH:
1699                                 foreach my $filter (keys %paths) {
1700                                         # looking for forks;
1701                                         my $pfx = substr($path, 0, length($filter));
1702                                         if ($pfx ne $filter) {
1703                                                 next PATH;
1704                                         }
1705                                         my $sfx = substr($path, length($filter));
1706                                         if ($sfx !~ /^\/.*\.git$/) {
1707                                                 next PATH;
1708                                         }
1709                                         # is a fork, don't include it in
1710                                         # the list
1711                                         next PROJECT;
1712                                 }
1713                         }
1714                         if (check_export_ok("$projectroot/$path")) {
1715                                 my $pr = {
1716                                         path => $path,
1717                                         owner => to_utf8($owner),
1718                                 };
1719                                 push @list, $pr;
1720                                 (my $forks_path = $path) =~ s/\.git$//;
1721                                 $paths{$forks_path}++;
1722                         }
1723                 }
1724                 close $fd;
1725         }
1726         return @list;
1727 }
1728
1729 our $gitweb_project_owner = undef;
1730 sub git_get_project_list_from_file {
1731
1732         return if (defined $gitweb_project_owner);
1733
1734         $gitweb_project_owner = {};
1735         # read from file (url-encoded):
1736         # 'git%2Fgit.git Linus+Torvalds'
1737         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1738         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1739         if (-f $projects_list) {
1740                 open (my $fd , $projects_list);
1741                 while (my $line = <$fd>) {
1742                         chomp $line;
1743                         my ($pr, $ow) = split ' ', $line;
1744                         $pr = unescape($pr);
1745                         $ow = unescape($ow);
1746                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1747                 }
1748                 close $fd;
1749         }
1750 }
1751
1752 sub git_get_project_owner {
1753         my $project = shift;
1754         my $owner;
1755
1756         return undef unless $project;
1757
1758         if (!defined $gitweb_project_owner) {
1759                 git_get_project_list_from_file();
1760         }
1761
1762         if (exists $gitweb_project_owner->{$project}) {
1763                 $owner = $gitweb_project_owner->{$project};
1764         }
1765         if (!defined $owner) {
1766                 $owner = get_file_owner("$projectroot/$project");
1767         }
1768
1769         return $owner;
1770 }
1771
1772 sub git_get_last_activity {
1773         my ($path) = @_;
1774         my $fd;
1775
1776         $git_dir = "$projectroot/$path";
1777         open($fd, "-|", git_cmd(), 'for-each-ref',
1778              '--format=%(committer)',
1779              '--sort=-committerdate',
1780              '--count=1',
1781              'refs/heads') or return;
1782         my $most_recent = <$fd>;
1783         close $fd or return;
1784         if (defined $most_recent &&
1785             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1786                 my $timestamp = $1;
1787                 my $age = time - $timestamp;
1788                 return ($age, age_string($age));
1789         }
1790         return (undef, undef);
1791 }
1792
1793 sub git_get_references {
1794         my $type = shift || "";
1795         my %refs;
1796         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1797         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1798         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1799                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1800                 or return;
1801
1802         while (my $line = <$fd>) {
1803                 chomp $line;
1804                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1805                         if (defined $refs{$1}) {
1806                                 push @{$refs{$1}}, $2;
1807                         } else {
1808                                 $refs{$1} = [ $2 ];
1809                         }
1810                 }
1811         }
1812         close $fd or return;
1813         return \%refs;
1814 }
1815
1816 sub git_get_rev_name_tags {
1817         my $hash = shift || return undef;
1818
1819         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1820                 or return;
1821         my $name_rev = <$fd>;
1822         close $fd;
1823
1824         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1825                 return $1;
1826         } else {
1827                 # catches also '$hash undefined' output
1828                 return undef;
1829         }
1830 }
1831
1832 ## ----------------------------------------------------------------------
1833 ## parse to hash functions
1834
1835 sub parse_date {
1836         my $epoch = shift;
1837         my $tz = shift || "-0000";
1838
1839         my %date;
1840         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1841         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1842         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1843         $date{'hour'} = $hour;
1844         $date{'minute'} = $min;
1845         $date{'mday'} = $mday;
1846         $date{'day'} = $days[$wday];
1847         $date{'month'} = $months[$mon];
1848         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1849                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1850         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1851                              $mday, $months[$mon], $hour ,$min;
1852         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1853                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1854
1855         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1856         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1857         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1858         $date{'hour_local'} = $hour;
1859         $date{'minute_local'} = $min;
1860         $date{'tz_local'} = $tz;
1861         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1862                                   1900+$year, $mon+1, $mday,
1863                                   $hour, $min, $sec, $tz);
1864         return %date;
1865 }
1866
1867 sub parse_tag {
1868         my $tag_id = shift;
1869         my %tag;
1870         my @comment;
1871
1872         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1873         $tag{'id'} = $tag_id;
1874         while (my $line = <$fd>) {
1875                 chomp $line;
1876                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1877                         $tag{'object'} = $1;
1878                 } elsif ($line =~ m/^type (.+)$/) {
1879                         $tag{'type'} = $1;
1880                 } elsif ($line =~ m/^tag (.+)$/) {
1881                         $tag{'name'} = $1;
1882                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1883                         $tag{'author'} = $1;
1884                         $tag{'epoch'} = $2;
1885                         $tag{'tz'} = $3;
1886                 } elsif ($line =~ m/--BEGIN/) {
1887                         push @comment, $line;
1888                         last;
1889                 } elsif ($line eq "") {
1890                         last;
1891                 }
1892         }
1893         push @comment, <$fd>;
1894         $tag{'comment'} = \@comment;
1895         close $fd or return;
1896         if (!defined $tag{'name'}) {
1897                 return
1898         };
1899         return %tag
1900 }
1901
1902 sub parse_commit_text {
1903         my ($commit_text, $withparents) = @_;
1904         my @commit_lines = split '\n', $commit_text;
1905         my %co;
1906
1907         pop @commit_lines; # Remove '\0'
1908
1909         if (! @commit_lines) {
1910                 return;
1911         }
1912
1913         my $header = shift @commit_lines;
1914         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1915                 return;
1916         }
1917         ($co{'id'}, my @parents) = split ' ', $header;
1918         while (my $line = shift @commit_lines) {
1919                 last if $line eq "\n";
1920                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1921                         $co{'tree'} = $1;
1922                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1923                         push @parents, $1;
1924                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1925                         $co{'author'} = $1;
1926                         $co{'author_epoch'} = $2;
1927                         $co{'author_tz'} = $3;
1928                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1929                                 $co{'author_name'}  = $1;
1930                                 $co{'author_email'} = $2;
1931                         } else {
1932                                 $co{'author_name'} = $co{'author'};
1933                         }
1934                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1935                         $co{'committer'} = $1;
1936                         $co{'committer_epoch'} = $2;
1937                         $co{'committer_tz'} = $3;
1938                         $co{'committer_name'} = $co{'committer'};
1939                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1940                                 $co{'committer_name'}  = $1;
1941                                 $co{'committer_email'} = $2;
1942                         } else {
1943                                 $co{'committer_name'} = $co{'committer'};
1944                         }
1945                 }
1946         }
1947         if (!defined $co{'tree'}) {
1948                 return;
1949         };
1950         $co{'parents'} = \@parents;
1951         $co{'parent'} = $parents[0];
1952
1953         foreach my $title (@commit_lines) {
1954                 $title =~ s/^    //;
1955                 if ($title ne "") {
1956                         $co{'title'} = chop_str($title, 80, 5);
1957                         # remove leading stuff of merges to make the interesting part visible
1958                         if (length($title) > 50) {
1959                                 $title =~ s/^Automatic //;
1960                                 $title =~ s/^merge (of|with) /Merge ... /i;
1961                                 if (length($title) > 50) {
1962                                         $title =~ s/(http|rsync):\/\///;
1963                                 }
1964                                 if (length($title) > 50) {
1965                                         $title =~ s/(master|www|rsync)\.//;
1966                                 }
1967                                 if (length($title) > 50) {
1968                                         $title =~ s/kernel.org:?//;
1969                                 }
1970                                 if (length($title) > 50) {
1971                                         $title =~ s/\/pub\/scm//;
1972                                 }
1973                         }
1974                         $co{'title_short'} = chop_str($title, 50, 5);
1975                         last;
1976                 }
1977         }
1978         if ($co{'title'} eq "") {
1979                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1980         }
1981         # remove added spaces
1982         foreach my $line (@commit_lines) {
1983                 $line =~ s/^    //;
1984         }
1985         $co{'comment'} = \@commit_lines;
1986
1987         my $age = time - $co{'committer_epoch'};
1988         $co{'age'} = $age;
1989         $co{'age_string'} = age_string($age);
1990         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1991         if ($age > 60*60*24*7*2) {
1992                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1993                 $co{'age_string_age'} = $co{'age_string'};
1994         } else {
1995                 $co{'age_string_date'} = $co{'age_string'};
1996                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1997         }
1998         return %co;
1999 }
2000
2001 sub parse_commit {
2002         my ($commit_id) = @_;
2003         my %co;
2004
2005         local $/ = "\0";
2006
2007         open my $fd, "-|", git_cmd(), "rev-list",
2008                 "--parents",
2009                 "--header",
2010                 "--max-count=1",
2011                 $commit_id,
2012                 "--",
2013                 or die_error(undef, "Open git-rev-list failed");
2014         %co = parse_commit_text(<$fd>, 1);
2015         close $fd;
2016
2017         return %co;
2018 }
2019
2020 sub parse_commits {
2021         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2022         my @cos;
2023
2024         $maxcount ||= 1;
2025         $skip ||= 0;
2026
2027         local $/ = "\0";
2028
2029         open my $fd, "-|", git_cmd(), "rev-list",
2030                 "--header",
2031                 ($arg ? ($arg) : ()),
2032                 ("--max-count=" . $maxcount),
2033                 ("--skip=" . $skip),
2034                 @extra_options,
2035                 $commit_id,
2036                 "--",
2037                 ($filename ? ($filename) : ())
2038                 or die_error(undef, "Open git-rev-list failed");
2039         while (my $line = <$fd>) {
2040                 my %co = parse_commit_text($line);
2041                 push @cos, \%co;
2042         }
2043         close $fd;
2044
2045         return wantarray ? @cos : \@cos;
2046 }
2047
2048 # parse ref from ref_file, given by ref_id, with given type
2049 sub parse_ref {
2050         my $ref_file = shift;
2051         my $ref_id = shift;
2052         my $type = shift || git_get_type($ref_id);
2053         my %ref_item;
2054
2055         $ref_item{'type'} = $type;
2056         $ref_item{'id'} = $ref_id;
2057         $ref_item{'epoch'} = 0;
2058         $ref_item{'age'} = "unknown";
2059         if ($type eq "tag") {
2060                 my %tag = parse_tag($ref_id);
2061                 $ref_item{'comment'} = $tag{'comment'};
2062                 if ($tag{'type'} eq "commit") {
2063                         my %co = parse_commit($tag{'object'});
2064                         $ref_item{'epoch'} = $co{'committer_epoch'};
2065                         $ref_item{'age'} = $co{'age_string'};
2066                 } elsif (defined($tag{'epoch'})) {
2067                         my $age = time - $tag{'epoch'};
2068                         $ref_item{'epoch'} = $tag{'epoch'};
2069                         $ref_item{'age'} = age_string($age);
2070                 }
2071                 $ref_item{'reftype'} = $tag{'type'};
2072                 $ref_item{'name'} = $tag{'name'};
2073                 $ref_item{'refid'} = $tag{'object'};
2074         } elsif ($type eq "commit"){
2075                 my %co = parse_commit($ref_id);
2076                 $ref_item{'reftype'} = "commit";
2077                 $ref_item{'name'} = $ref_file;
2078                 $ref_item{'title'} = $co{'title'};
2079                 $ref_item{'refid'} = $ref_id;
2080                 $ref_item{'epoch'} = $co{'committer_epoch'};
2081                 $ref_item{'age'} = $co{'age_string'};
2082         } else {
2083                 $ref_item{'reftype'} = $type;
2084                 $ref_item{'name'} = $ref_file;
2085                 $ref_item{'refid'} = $ref_id;
2086         }
2087
2088         return %ref_item;
2089 }
2090
2091 # parse line of git-diff-tree "raw" output
2092 sub parse_difftree_raw_line {
2093         my $line = shift;
2094         my %res;
2095
2096         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2097         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2098         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2099                 $res{'from_mode'} = $1;
2100                 $res{'to_mode'} = $2;
2101                 $res{'from_id'} = $3;
2102                 $res{'to_id'} = $4;
2103                 $res{'status'} = $res{'status_str'} = $5;
2104                 $res{'similarity'} = $6;
2105                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2106                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2107                 } else {
2108                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2109                 }
2110         }
2111         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2112         # combined diff (for merge commit)
2113         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2114                 $res{'nparents'}  = length($1);
2115                 $res{'from_mode'} = [ split(' ', $2) ];
2116                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2117                 $res{'from_id'} = [ split(' ', $3) ];
2118                 $res{'to_id'} = pop @{$res{'from_id'}};
2119                 $res{'status_str'} = $4;
2120                 $res{'status'} = [ split('', $4) ];
2121                 $res{'to_file'} = unquote($5);
2122         }
2123         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2124         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2125                 $res{'commit'} = $1;
2126         }
2127
2128         return wantarray ? %res : \%res;
2129 }
2130
2131 # wrapper: return parsed line of git-diff-tree "raw" output
2132 # (the argument might be raw line, or parsed info)
2133 sub parsed_difftree_line {
2134         my $line_or_ref = shift;
2135
2136         if (ref($line_or_ref) eq "HASH") {
2137                 # pre-parsed (or generated by hand)
2138                 return $line_or_ref;
2139         } else {
2140                 return parse_difftree_raw_line($line_or_ref);
2141         }
2142 }
2143
2144 # parse line of git-ls-tree output
2145 sub parse_ls_tree_line ($;%) {
2146         my $line = shift;
2147         my %opts = @_;
2148         my %res;
2149
2150         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2151         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2152
2153         $res{'mode'} = $1;
2154         $res{'type'} = $2;
2155         $res{'hash'} = $3;
2156         if ($opts{'-z'}) {
2157                 $res{'name'} = $4;
2158         } else {
2159                 $res{'name'} = unquote($4);
2160         }
2161
2162         return wantarray ? %res : \%res;
2163 }
2164
2165 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2166 sub parse_from_to_diffinfo {
2167         my ($diffinfo, $from, $to, @parents) = @_;
2168
2169         if ($diffinfo->{'nparents'}) {
2170                 # combined diff
2171                 $from->{'file'} = [];
2172                 $from->{'href'} = [];
2173                 fill_from_file_info($diffinfo, @parents)
2174                         unless exists $diffinfo->{'from_file'};
2175                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2176                         $from->{'file'}[$i] =
2177                                 defined $diffinfo->{'from_file'}[$i] ?
2178                                         $diffinfo->{'from_file'}[$i] :
2179                                         $diffinfo->{'to_file'};
2180                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2181                                 $from->{'href'}[$i] = href(action=>"blob",
2182                                                            hash_base=>$parents[$i],
2183                                                            hash=>$diffinfo->{'from_id'}[$i],
2184                                                            file_name=>$from->{'file'}[$i]);
2185                         } else {
2186                                 $from->{'href'}[$i] = undef;
2187                         }
2188                 }
2189         } else {
2190                 # ordinary (not combined) diff
2191                 $from->{'file'} = $diffinfo->{'from_file'};
2192                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2193                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2194                                                hash=>$diffinfo->{'from_id'},
2195                                                file_name=>$from->{'file'});
2196                 } else {
2197                         delete $from->{'href'};
2198                 }
2199         }
2200
2201         $to->{'file'} = $diffinfo->{'to_file'};
2202         if (!is_deleted($diffinfo)) { # file exists in result
2203                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2204                                      hash=>$diffinfo->{'to_id'},
2205                                      file_name=>$to->{'file'});
2206         } else {
2207                 delete $to->{'href'};
2208         }
2209 }
2210
2211 ## ......................................................................
2212 ## parse to array of hashes functions
2213
2214 sub git_get_heads_list {
2215         my $limit = shift;
2216         my @headslist;
2217
2218         open my $fd, '-|', git_cmd(), 'for-each-ref',
2219                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2220                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2221                 'refs/heads'
2222                 or return;
2223         while (my $line = <$fd>) {
2224                 my %ref_item;
2225
2226                 chomp $line;
2227                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2228                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2229                 my ($committer, $epoch, $tz) =
2230                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2231                 $name =~ s!^refs/heads/!!;
2232
2233                 $ref_item{'name'}  = $name;
2234                 $ref_item{'id'}    = $hash;
2235                 $ref_item{'title'} = $title || '(no commit message)';
2236                 $ref_item{'epoch'} = $epoch;
2237                 if ($epoch) {
2238                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2239                 } else {
2240                         $ref_item{'age'} = "unknown";
2241                 }
2242
2243                 push @headslist, \%ref_item;
2244         }
2245         close $fd;
2246
2247         return wantarray ? @headslist : \@headslist;
2248 }
2249
2250 sub git_get_tags_list {
2251         my $limit = shift;
2252         my @tagslist;
2253
2254         open my $fd, '-|', git_cmd(), 'for-each-ref',
2255                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2256                 '--format=%(objectname) %(objecttype) %(refname) '.
2257                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2258                 'refs/tags'
2259                 or return;
2260         while (my $line = <$fd>) {
2261                 my %ref_item;
2262
2263                 chomp $line;
2264                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2265                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2266                 my ($creator, $epoch, $tz) =
2267                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2268                 $name =~ s!^refs/tags/!!;
2269
2270                 $ref_item{'type'} = $type;
2271                 $ref_item{'id'} = $id;
2272                 $ref_item{'name'} = $name;
2273                 if ($type eq "tag") {
2274                         $ref_item{'subject'} = $title;
2275                         $ref_item{'reftype'} = $reftype;
2276                         $ref_item{'refid'}   = $refid;
2277                 } else {
2278                         $ref_item{'reftype'} = $type;
2279                         $ref_item{'refid'}   = $id;
2280                 }
2281
2282                 if ($type eq "tag" || $type eq "commit") {
2283                         $ref_item{'epoch'} = $epoch;
2284                         if ($epoch) {
2285                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2286                         } else {
2287                                 $ref_item{'age'} = "unknown";
2288                         }
2289                 }
2290
2291                 push @tagslist, \%ref_item;
2292         }
2293         close $fd;
2294
2295         return wantarray ? @tagslist : \@tagslist;
2296 }
2297
2298 ## ----------------------------------------------------------------------
2299 ## filesystem-related functions
2300
2301 sub get_file_owner {
2302         my $path = shift;
2303
2304         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2305         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2306         if (!defined $gcos) {
2307                 return undef;
2308         }
2309         my $owner = $gcos;
2310         $owner =~ s/[,;].*$//;
2311         return to_utf8($owner);
2312 }
2313
2314 ## ......................................................................
2315 ## mimetype related functions
2316
2317 sub mimetype_guess_file {
2318         my $filename = shift;
2319         my $mimemap = shift;
2320         -r $mimemap or return undef;
2321
2322         my %mimemap;
2323         open(MIME, $mimemap) or return undef;
2324         while (<MIME>) {
2325                 next if m/^#/; # skip comments
2326                 my ($mime, $exts) = split(/\t+/);
2327                 if (defined $exts) {
2328                         my @exts = split(/\s+/, $exts);
2329                         foreach my $ext (@exts) {
2330                                 $mimemap{$ext} = $mime;
2331                         }
2332                 }
2333         }
2334         close(MIME);
2335
2336         $filename =~ /\.([^.]*)$/;
2337         return $mimemap{$1};
2338 }
2339
2340 sub mimetype_guess {
2341         my $filename = shift;
2342         my $mime;
2343         $filename =~ /\./ or return undef;
2344
2345         if ($mimetypes_file) {
2346                 my $file = $mimetypes_file;
2347                 if ($file !~ m!^/!) { # if it is relative path
2348                         # it is relative to project
2349                         $file = "$projectroot/$project/$file";
2350                 }
2351                 $mime = mimetype_guess_file($filename, $file);
2352         }
2353         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2354         return $mime;
2355 }
2356
2357 sub blob_mimetype {
2358         my $fd = shift;
2359         my $filename = shift;
2360
2361         if ($filename) {
2362                 my $mime = mimetype_guess($filename);
2363                 $mime and return $mime;
2364         }
2365
2366         # just in case
2367         return $default_blob_plain_mimetype unless $fd;
2368
2369         if (-T $fd) {
2370                 return 'text/plain' .
2371                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2372         } elsif (! $filename) {
2373                 return 'application/octet-stream';
2374         } elsif ($filename =~ m/\.png$/i) {
2375                 return 'image/png';
2376         } elsif ($filename =~ m/\.gif$/i) {
2377                 return 'image/gif';
2378         } elsif ($filename =~ m/\.jpe?g$/i) {
2379                 return 'image/jpeg';
2380         } else {
2381                 return 'application/octet-stream';
2382         }
2383 }
2384
2385 ## ======================================================================
2386 ## functions printing HTML: header, footer, error page
2387
2388 sub git_header_html {
2389         my $status = shift || "200 OK";
2390         my $expires = shift;
2391
2392         my $title = "$site_name";
2393         if (defined $project) {
2394                 $title .= " - " . to_utf8($project);
2395                 if (defined $action) {
2396                         $title .= "/$action";
2397                         if (defined $file_name) {
2398                                 $title .= " - " . esc_path($file_name);
2399                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2400                                         $title .= "/";
2401                                 }
2402                         }
2403                 }
2404         }
2405         my $content_type;
2406         # require explicit support from the UA if we are to send the page as
2407         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2408         # we have to do this because MSIE sometimes globs '*/*', pretending to
2409         # support xhtml+xml but choking when it gets what it asked for.
2410         if (defined $cgi->http('HTTP_ACCEPT') &&
2411             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2412             $cgi->Accept('application/xhtml+xml') != 0) {
2413                 $content_type = 'application/xhtml+xml';
2414         } else {
2415                 $content_type = 'text/html';
2416         }
2417         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2418                            -status=> $status, -expires => $expires);
2419         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2420         print <<EOF;
2421 <?xml version="1.0" encoding="utf-8"?>
2422 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2423 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2424 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2425 <!-- git core binaries version $git_version -->
2426 <head>
2427 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2428 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2429 <meta name="robots" content="index, nofollow"/>
2430 <title>$title</title>
2431 EOF
2432 # print out each stylesheet that exist
2433         if (defined $stylesheet) {
2434 #provides backwards capability for those people who define style sheet in a config file
2435                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2436         } else {
2437                 foreach my $stylesheet (@stylesheets) {
2438                         next unless $stylesheet;
2439                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2440                 }
2441         }
2442         if (defined $project) {
2443                 printf('<link rel="alternate" title="%s log RSS feed" '.
2444                        'href="%s" type="application/rss+xml" />'."\n",
2445                        esc_param($project), href(action=>"rss"));
2446                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2447                        'href="%s" type="application/rss+xml" />'."\n",
2448                        esc_param($project), href(action=>"rss",
2449                                                  extra_options=>"--no-merges"));
2450                 printf('<link rel="alternate" title="%s log Atom feed" '.
2451                        'href="%s" type="application/atom+xml" />'."\n",
2452                        esc_param($project), href(action=>"atom"));
2453                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2454                        'href="%s" type="application/atom+xml" />'."\n",
2455                        esc_param($project), href(action=>"atom",
2456                                                  extra_options=>"--no-merges"));
2457         } else {
2458                 printf('<link rel="alternate" title="%s projects list" '.
2459                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2460                        $site_name, href(project=>undef, action=>"project_index"));
2461                 printf('<link rel="alternate" title="%s projects feeds" '.
2462                        'href="%s" type="text/x-opml"/>'."\n",
2463                        $site_name, href(project=>undef, action=>"opml"));
2464         }
2465         if (defined $favicon) {
2466                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2467         }
2468
2469         print "</head>\n" .
2470               "<body>\n";
2471
2472         if (-f $site_header) {
2473                 open (my $fd, $site_header);
2474                 print <$fd>;
2475                 close $fd;
2476         }
2477
2478         print "<div class=\"page_header\">\n" .
2479               $cgi->a({-href => esc_url($logo_url),
2480                        -title => $logo_label},
2481                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2482         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2483         if (defined $project) {
2484                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2485                 if (defined $action) {
2486                         print " / $action";
2487                 }
2488                 print "\n";
2489         }
2490         print "</div>\n";
2491
2492         my ($have_search) = gitweb_check_feature('search');
2493         if ((defined $project) && ($have_search)) {
2494                 if (!defined $searchtext) {
2495                         $searchtext = "";
2496                 }
2497                 my $search_hash;
2498                 if (defined $hash_base) {
2499                         $search_hash = $hash_base;
2500                 } elsif (defined $hash) {
2501                         $search_hash = $hash;
2502                 } else {
2503                         $search_hash = "HEAD";
2504                 }
2505                 my $action = $my_uri;
2506                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2507                 if ($use_pathinfo) {
2508                         $action .= "/$project";
2509                 } else {
2510                         $cgi->param("p", $project);
2511                 }
2512                 $cgi->param("a", "search");
2513                 $cgi->param("h", $search_hash);
2514                 print $cgi->startform(-method => "get", -action => $action) .
2515                       "<div class=\"search\">\n" .
2516                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2517                       $cgi->hidden(-name => "a") . "\n" .
2518                       $cgi->hidden(-name => "h") . "\n" .
2519                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2520                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2521                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2522                       " search:\n",
2523                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2524                       "</div>" .
2525                       $cgi->end_form() . "\n";
2526         }
2527 }
2528
2529 sub git_footer_html {
2530         print "<div class=\"page_footer\">\n";
2531         if (defined $project) {
2532                 my $descr = git_get_project_description($project);
2533                 if (defined $descr) {
2534                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2535                 }
2536                 print $cgi->a({-href => href(action=>"rss"),
2537                               -class => "rss_logo"}, "RSS") . " ";
2538                 print $cgi->a({-href => href(action=>"atom"),
2539                               -class => "rss_logo"}, "Atom") . "\n";
2540         } else {
2541                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2542                               -class => "rss_logo"}, "OPML") . " ";
2543                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2544                               -class => "rss_logo"}, "TXT") . "\n";
2545         }
2546         print "</div>\n" ;
2547
2548         if (-f $site_footer) {
2549                 open (my $fd, $site_footer);
2550                 print <$fd>;
2551                 close $fd;
2552         }
2553
2554         print "</body>\n" .
2555               "</html>";
2556 }
2557
2558 sub die_error {
2559         my $status = shift || "403 Forbidden";
2560         my $error = shift || "Malformed query, file missing or permission denied";
2561
2562         git_header_html($status);
2563         print <<EOF;
2564 <div class="page_body">
2565 <br /><br />
2566 $status - $error
2567 <br />
2568 </div>
2569 EOF
2570         git_footer_html();
2571         exit;
2572 }
2573
2574 ## ----------------------------------------------------------------------
2575 ## functions printing or outputting HTML: navigation
2576
2577 sub git_print_page_nav {
2578         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2579         $extra = '' if !defined $extra; # pager or formats
2580
2581         my @navs = qw(summary shortlog log commit commitdiff tree);
2582         if ($suppress) {
2583                 @navs = grep { $_ ne $suppress } @navs;
2584         }
2585
2586         my %arg = map { $_ => {action=>$_} } @navs;
2587         if (defined $head) {
2588                 for (qw(commit commitdiff)) {
2589                         $arg{$_}{'hash'} = $head;
2590                 }
2591                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2592                         for (qw(shortlog log)) {
2593                                 $arg{$_}{'hash'} = $head;
2594                         }
2595                 }
2596         }
2597         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2598         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2599
2600         print "<div class=\"page_nav\">\n" .
2601                 (join " | ",
2602                  map { $_ eq $current ?
2603                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2604                  } @navs);
2605         print "<br/>\n$extra<br/>\n" .
2606               "</div>\n";
2607 }
2608
2609 sub format_paging_nav {
2610         my ($action, $hash, $head, $page, $nrevs) = @_;
2611         my $paging_nav;
2612
2613
2614         if ($hash ne $head || $page) {
2615                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2616         } else {
2617                 $paging_nav .= "HEAD";
2618         }
2619
2620         if ($page > 0) {
2621                 $paging_nav .= " &sdot; " .
2622                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2623                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2624         } else {
2625                 $paging_nav .= " &sdot; prev";
2626         }
2627
2628         if ($nrevs >= (100 * ($page+1)-1)) {
2629                 $paging_nav .= " &sdot; " .
2630                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2631                                  -accesskey => "n", -title => "Alt-n"}, "next");
2632         } else {
2633                 $paging_nav .= " &sdot; next";
2634         }
2635
2636         return $paging_nav;
2637 }
2638
2639 ## ......................................................................
2640 ## functions printing or outputting HTML: div
2641
2642 sub git_print_header_div {
2643         my ($action, $title, $hash, $hash_base) = @_;
2644         my %args = ();
2645
2646         $args{'action'} = $action;
2647         $args{'hash'} = $hash if $hash;
2648         $args{'hash_base'} = $hash_base if $hash_base;
2649
2650         print "<div class=\"header\">\n" .
2651               $cgi->a({-href => href(%args), -class => "title"},
2652               $title ? $title : $action) .
2653               "\n</div>\n";
2654 }
2655
2656 #sub git_print_authorship (\%) {
2657 sub git_print_authorship {
2658         my $co = shift;
2659
2660         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2661         print "<div class=\"author_date\">" .
2662               esc_html($co->{'author_name'}) .
2663               " [$ad{'rfc2822'}";
2664         if ($ad{'hour_local'} < 6) {
2665                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2666                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2667         } else {
2668                 printf(" (%02d:%02d %s)",
2669                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2670         }
2671         print "]</div>\n";
2672 }
2673
2674 sub git_print_page_path {
2675         my $name = shift;
2676         my $type = shift;
2677         my $hb = shift;
2678
2679
2680         print "<div class=\"page_path\">";
2681         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2682                       -title => 'tree root'}, to_utf8("[$project]"));
2683         print " / ";
2684         if (defined $name) {
2685                 my @dirname = split '/', $name;
2686                 my $basename = pop @dirname;
2687                 my $fullname = '';
2688
2689                 foreach my $dir (@dirname) {
2690                         $fullname .= ($fullname ? '/' : '') . $dir;
2691                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2692                                                      hash_base=>$hb),
2693                                       -title => $fullname}, esc_path($dir));
2694                         print " / ";
2695                 }
2696                 if (defined $type && $type eq 'blob') {
2697                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2698                                                      hash_base=>$hb),
2699                                       -title => $name}, esc_path($basename));
2700                 } elsif (defined $type && $type eq 'tree') {
2701                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2702                                                      hash_base=>$hb),
2703                                       -title => $name}, esc_path($basename));
2704                         print " / ";
2705                 } else {
2706                         print esc_path($basename);
2707                 }
2708         }
2709         print "<br/></div>\n";
2710 }
2711
2712 # sub git_print_log (\@;%) {
2713 sub git_print_log ($;%) {
2714         my $log = shift;
2715         my %opts = @_;
2716
2717         if ($opts{'-remove_title'}) {
2718                 # remove title, i.e. first line of log
2719                 shift @$log;
2720         }
2721         # remove leading empty lines
2722         while (defined $log->[0] && $log->[0] eq "") {
2723                 shift @$log;
2724         }
2725
2726         # print log
2727         my $signoff = 0;
2728         my $empty = 0;
2729         foreach my $line (@$log) {
2730                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2731                         $signoff = 1;
2732                         $empty = 0;
2733                         if (! $opts{'-remove_signoff'}) {
2734                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2735                                 next;
2736                         } else {
2737                                 # remove signoff lines
2738                                 next;
2739                         }
2740                 } else {
2741                         $signoff = 0;
2742                 }
2743
2744                 # print only one empty line
2745                 # do not print empty line after signoff
2746                 if ($line eq "") {
2747                         next if ($empty || $signoff);
2748                         $empty = 1;
2749                 } else {
2750                         $empty = 0;
2751                 }
2752
2753                 print format_log_line_html($line) . "<br/>\n";
2754         }
2755
2756         if ($opts{'-final_empty_line'}) {
2757                 # end with single empty line
2758                 print "<br/>\n" unless $empty;
2759         }
2760 }
2761
2762 # return link target (what link points to)
2763 sub git_get_link_target {
2764         my $hash = shift;
2765         my $link_target;
2766
2767         # read link
2768         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2769                 or return;
2770         {
2771                 local $/;
2772                 $link_target = <$fd>;
2773         }
2774         close $fd
2775                 or return;
2776
2777         return $link_target;
2778 }
2779
2780 # given link target, and the directory (basedir) the link is in,
2781 # return target of link relative to top directory (top tree);
2782 # return undef if it is not possible (including absolute links).
2783 sub normalize_link_target {
2784         my ($link_target, $basedir, $hash_base) = @_;
2785
2786         # we can normalize symlink target only if $hash_base is provided
2787         return unless $hash_base;
2788
2789         # absolute symlinks (beginning with '/') cannot be normalized
2790         return if (substr($link_target, 0, 1) eq '/');
2791
2792         # normalize link target to path from top (root) tree (dir)
2793         my $path;
2794         if ($basedir) {
2795                 $path = $basedir . '/' . $link_target;
2796         } else {
2797                 # we are in top (root) tree (dir)
2798                 $path = $link_target;
2799         }
2800
2801         # remove //, /./, and /../
2802         my @path_parts;
2803         foreach my $part (split('/', $path)) {
2804                 # discard '.' and ''
2805                 next if (!$part || $part eq '.');
2806                 # handle '..'
2807                 if ($part eq '..') {
2808                         if (@path_parts) {
2809                                 pop @path_parts;
2810                         } else {
2811                                 # link leads outside repository (outside top dir)
2812                                 return;
2813                         }
2814                 } else {
2815                         push @path_parts, $part;
2816                 }
2817         }
2818         $path = join('/', @path_parts);
2819
2820         return $path;
2821 }
2822
2823 # print tree entry (row of git_tree), but without encompassing <tr> element
2824 sub git_print_tree_entry {
2825         my ($t, $basedir, $hash_base, $have_blame) = @_;
2826
2827         my %base_key = ();
2828         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2829
2830         # The format of a table row is: mode list link.  Where mode is
2831         # the mode of the entry, list is the name of the entry, an href,
2832         # and link is the action links of the entry.
2833
2834         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2835         if ($t->{'type'} eq "blob") {
2836                 print "<td class=\"list\">" .
2837                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2838                                                file_name=>"$basedir$t->{'name'}", %base_key),
2839                                 -class => "list"}, esc_path($t->{'name'}));
2840                 if (S_ISLNK(oct $t->{'mode'})) {
2841                         my $link_target = git_get_link_target($t->{'hash'});
2842                         if ($link_target) {
2843                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2844                                 if (defined $norm_target) {
2845                                         print " -> " .
2846                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2847                                                                      file_name=>$norm_target),
2848                                                        -title => $norm_target}, esc_path($link_target));
2849                                 } else {
2850                                         print " -> " . esc_path($link_target);
2851                                 }
2852                         }
2853                 }
2854                 print "</td>\n";
2855                 print "<td class=\"link\">";
2856                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2857                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2858                               "blob");
2859                 if ($have_blame) {
2860                         print " | " .
2861                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2862                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2863                                       "blame");
2864                 }
2865                 if (defined $hash_base) {
2866                         print " | " .
2867                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2868                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2869                                       "history");
2870                 }
2871                 print " | " .
2872                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2873                                                file_name=>"$basedir$t->{'name'}")},
2874                                 "raw");
2875                 print "</td>\n";
2876
2877         } elsif ($t->{'type'} eq "tree") {
2878                 print "<td class=\"list\">";
2879                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2880                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2881                               esc_path($t->{'name'}));
2882                 print "</td>\n";
2883                 print "<td class=\"link\">";
2884                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2885                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2886                               "tree");
2887                 if (defined $hash_base) {
2888                         print " | " .
2889                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2890                                                      file_name=>"$basedir$t->{'name'}")},
2891                                       "history");
2892                 }
2893                 print "</td>\n";
2894         } else {
2895                 # unknown object: we can only present history for it
2896                 # (this includes 'commit' object, i.e. submodule support)
2897                 print "<td class=\"list\">" .
2898                       esc_path($t->{'name'}) .
2899                       "</td>\n";
2900                 print "<td class=\"link\">";
2901                 if (defined $hash_base) {
2902                         print $cgi->a({-href => href(action=>"history",
2903                                                      hash_base=>$hash_base,
2904                                                      file_name=>"$basedir$t->{'name'}")},
2905                                       "history");
2906                 }
2907                 print "</td>\n";
2908         }
2909 }
2910
2911 ## ......................................................................
2912 ## functions printing large fragments of HTML
2913
2914 # get pre-image filenames for merge (combined) diff
2915 sub fill_from_file_info {
2916         my ($diff, @parents) = @_;
2917
2918         $diff->{'from_file'} = [ ];
2919         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2920         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2921                 if ($diff->{'status'}[$i] eq 'R' ||
2922                     $diff->{'status'}[$i] eq 'C') {
2923                         $diff->{'from_file'}[$i] =
2924                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2925                 }
2926         }
2927
2928         return $diff;
2929 }
2930
2931 # is current raw difftree line of file deletion
2932 sub is_deleted {
2933         my $diffinfo = shift;
2934
2935         return $diffinfo->{'status_str'} =~ /D/;
2936 }
2937
2938 # does patch correspond to [previous] difftree raw line
2939 # $diffinfo  - hashref of parsed raw diff format
2940 # $patchinfo - hashref of parsed patch diff format
2941 #              (the same keys as in $diffinfo)
2942 sub is_patch_split {
2943         my ($diffinfo, $patchinfo) = @_;
2944
2945         return defined $diffinfo && defined $patchinfo
2946                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2947 }
2948
2949
2950 sub git_difftree_body {
2951         my ($difftree, $hash, @parents) = @_;
2952         my ($parent) = $parents[0];
2953         my ($have_blame) = gitweb_check_feature('blame');
2954         print "<div class=\"list_head\">\n";
2955         if ($#{$difftree} > 10) {
2956                 print(($#{$difftree} + 1) . " files changed:\n");
2957         }
2958         print "</div>\n";
2959
2960         print "<table class=\"" .
2961               (@parents > 1 ? "combined " : "") .
2962               "diff_tree\">\n";
2963
2964         # header only for combined diff in 'commitdiff' view
2965         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2966         if ($has_header) {
2967                 # table header
2968                 print "<thead><tr>\n" .
2969                        "<th></th><th></th>\n"; # filename, patchN link
2970                 for (my $i = 0; $i < @parents; $i++) {
2971                         my $par = $parents[$i];
2972                         print "<th>" .
2973                               $cgi->a({-href => href(action=>"commitdiff",
2974                                                      hash=>$hash, hash_parent=>$par),
2975                                        -title => 'commitdiff to parent number ' .
2976                                                   ($i+1) . ': ' . substr($par,0,7)},
2977                                       $i+1) .
2978                               "&nbsp;</th>\n";
2979                 }
2980                 print "</tr></thead>\n<tbody>\n";
2981         }
2982
2983         my $alternate = 1;
2984         my $patchno = 0;
2985         foreach my $line (@{$difftree}) {
2986                 my $diff = parsed_difftree_line($line);
2987
2988                 if ($alternate) {
2989                         print "<tr class=\"dark\">\n";
2990                 } else {
2991                         print "<tr class=\"light\">\n";
2992                 }
2993                 $alternate ^= 1;
2994
2995                 if (exists $diff->{'nparents'}) { # combined diff
2996
2997                         fill_from_file_info($diff, @parents)
2998                                 unless exists $diff->{'from_file'};
2999
3000                         if (!is_deleted($diff)) {
3001                                 # file exists in the result (child) commit
3002                                 print "<td>" .
3003                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3004                                                              file_name=>$diff->{'to_file'},
3005                                                              hash_base=>$hash),
3006                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3007                                       "</td>\n";
3008                         } else {
3009                                 print "<td>" .
3010                                       esc_path($diff->{'to_file'}) .
3011                                       "</td>\n";
3012                         }
3013
3014                         if ($action eq 'commitdiff') {
3015                                 # link to patch
3016                                 $patchno++;
3017                                 print "<td class=\"link\">" .
3018                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3019                                       " | " .
3020                                       "</td>\n";
3021                         }
3022
3023                         my $has_history = 0;
3024                         my $not_deleted = 0;
3025                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3026                                 my $hash_parent = $parents[$i];
3027                                 my $from_hash = $diff->{'from_id'}[$i];
3028                                 my $from_path = $diff->{'from_file'}[$i];
3029                                 my $status = $diff->{'status'}[$i];
3030
3031                                 $has_history ||= ($status ne 'A');
3032                                 $not_deleted ||= ($status ne 'D');
3033
3034                                 if ($status eq 'A') {
3035                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3036                                 } elsif ($status eq 'D') {
3037                                         print "<td class=\"link\">" .
3038                                               $cgi->a({-href => href(action=>"blob",
3039                                                                      hash_base=>$hash,
3040                                                                      hash=>$from_hash,
3041                                                                      file_name=>$from_path)},
3042                                                       "blob" . ($i+1)) .
3043                                               " | </td>\n";
3044                                 } else {
3045                                         if ($diff->{'to_id'} eq $from_hash) {
3046                                                 print "<td class=\"link nochange\">";
3047                                         } else {
3048                                                 print "<td class=\"link\">";
3049                                         }
3050                                         print $cgi->a({-href => href(action=>"blobdiff",
3051                                                                      hash=>$diff->{'to_id'},
3052                                                                      hash_parent=>$from_hash,
3053                                                                      hash_base=>$hash,
3054                                                                      hash_parent_base=>$hash_parent,
3055                                                                      file_name=>$diff->{'to_file'},
3056                                                                      file_parent=>$from_path)},
3057                                                       "diff" . ($i+1)) .
3058                                               " | </td>\n";
3059                                 }
3060                         }
3061
3062                         print "<td class=\"link\">";
3063                         if ($not_deleted) {
3064                                 print $cgi->a({-href => href(action=>"blob",
3065                                                              hash=>$diff->{'to_id'},
3066                                                              file_name=>$diff->{'to_file'},
3067                                                              hash_base=>$hash)},
3068                                               "blob");
3069                                 print " | " if ($has_history);
3070                         }
3071                         if ($has_history) {
3072                                 print $cgi->a({-href => href(action=>"history",
3073                                                              file_name=>$diff->{'to_file'},
3074                                                              hash_base=>$hash)},
3075                                               "history");
3076                         }
3077                         print "</td>\n";
3078
3079                         print "</tr>\n";
3080                         next; # instead of 'else' clause, to avoid extra indent
3081                 }
3082                 # else ordinary diff
3083
3084                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3085                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3086                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3087                         $to_mode_oct = oct $diff->{'to_mode'};
3088                         if (S_ISREG($to_mode_oct)) { # only for regular file
3089                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3090                         }
3091                         $to_file_type = file_type($diff->{'to_mode'});
3092                 }
3093                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3094                         $from_mode_oct = oct $diff->{'from_mode'};
3095                         if (S_ISREG($to_mode_oct)) { # only for regular file
3096                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3097                         }
3098                         $from_file_type = file_type($diff->{'from_mode'});
3099                 }
3100
3101                 if ($diff->{'status'} eq "A") { # created
3102                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3103                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3104                         $mode_chng   .= "]</span>";
3105                         print "<td>";
3106                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3107                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3108                                       -class => "list"}, esc_path($diff->{'file'}));
3109                         print "</td>\n";
3110                         print "<td>$mode_chng</td>\n";
3111                         print "<td class=\"link\">";
3112                         if ($action eq 'commitdiff') {
3113                                 # link to patch
3114                                 $patchno++;
3115                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3116                                 print " | ";
3117                         }
3118                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3119                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3120                                       "blob");
3121                         print "</td>\n";
3122
3123                 } elsif ($diff->{'status'} eq "D") { # deleted
3124                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3125                         print "<td>";
3126                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3127                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3128                                        -class => "list"}, esc_path($diff->{'file'}));
3129                         print "</td>\n";
3130                         print "<td>$mode_chng</td>\n";
3131                         print "<td class=\"link\">";
3132                         if ($action eq 'commitdiff') {
3133                                 # link to patch
3134                                 $patchno++;
3135                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3136                                 print " | ";
3137                         }
3138                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3139                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3140                                       "blob") . " | ";
3141                         if ($have_blame) {
3142                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3143                                                              file_name=>$diff->{'file'})},
3144                                               "blame") . " | ";
3145                         }
3146                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3147                                                      file_name=>$diff->{'file'})},
3148                                       "history");
3149                         print "</td>\n";
3150
3151                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3152                         my $mode_chnge = "";
3153                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3154                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3155                                 if ($from_file_type ne $to_file_type) {
3156                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3157                                 }
3158                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3159                                         if ($from_mode_str && $to_mode_str) {
3160                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3161                                         } elsif ($to_mode_str) {
3162                                                 $mode_chnge .= " mode: $to_mode_str";
3163                                         }
3164                                 }
3165                                 $mode_chnge .= "]</span>\n";
3166                         }
3167                         print "<td>";
3168                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3169                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3170                                       -class => "list"}, esc_path($diff->{'file'}));
3171                         print "</td>\n";
3172                         print "<td>$mode_chnge</td>\n";
3173                         print "<td class=\"link\">";
3174                         if ($action eq 'commitdiff') {
3175                                 # link to patch
3176                                 $patchno++;
3177                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3178                                       " | ";
3179                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3180                                 # "commit" view and modified file (not onlu mode changed)
3181                                 print $cgi->a({-href => href(action=>"blobdiff",
3182                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3183                                                              hash_base=>$hash, hash_parent_base=>$parent,
3184                                                              file_name=>$diff->{'file'})},
3185                                               "diff") .
3186                                       " | ";
3187                         }
3188                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3189                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3190                                        "blob") . " | ";
3191                         if ($have_blame) {
3192                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3193                                                              file_name=>$diff->{'file'})},
3194                                               "blame") . " | ";
3195                         }
3196                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3197                                                      file_name=>$diff->{'file'})},
3198                                       "history");
3199                         print "</td>\n";
3200
3201                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3202                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3203                         my $nstatus = $status_name{$diff->{'status'}};
3204                         my $mode_chng = "";
3205                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3206                                 # mode also for directories, so we cannot use $to_mode_str
3207                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3208                         }
3209                         print "<td>" .
3210                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3211                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3212                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3213                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3214                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3215                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3216                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3217                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3218                               "<td class=\"link\">";
3219                         if ($action eq 'commitdiff') {
3220                                 # link to patch
3221                                 $patchno++;
3222                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3223                                       " | ";
3224                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3225                                 # "commit" view and modified file (not only pure rename or copy)
3226                                 print $cgi->a({-href => href(action=>"blobdiff",
3227                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3228                                                              hash_base=>$hash, hash_parent_base=>$parent,
3229                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3230                                               "diff") .
3231                                       " | ";
3232                         }
3233                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3234                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3235                                       "blob") . " | ";
3236                         if ($have_blame) {
3237                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3238                                                              file_name=>$diff->{'to_file'})},
3239                                               "blame") . " | ";
3240                         }
3241                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3242                                                     file_name=>$diff->{'to_file'})},
3243                                       "history");
3244                         print "</td>\n";
3245
3246                 } # we should not encounter Unmerged (U) or Unknown (X) status
3247                 print "</tr>\n";
3248         }
3249         print "</tbody>" if $has_header;
3250         print "</table>\n";
3251 }
3252
3253 sub git_patchset_body {
3254         my ($fd, $difftree, $hash, @hash_parents) = @_;
3255         my ($hash_parent) = $hash_parents[0];
3256
3257         my $is_combined = (@hash_parents > 1);
3258         my $patch_idx = 0;
3259         my $patch_number = 0;
3260         my $patch_line;
3261         my $diffinfo;
3262         my $to_name;
3263         my (%from, %to);
3264
3265         print "<div class=\"patchset\">\n";
3266
3267         # skip to first patch
3268         while ($patch_line = <$fd>) {
3269                 chomp $patch_line;
3270
3271                 last if ($patch_line =~ m/^diff /);
3272         }
3273
3274  PATCH:
3275         while ($patch_line) {
3276
3277                 # parse "git diff" header line
3278                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3279                         # $1 is from_name, which we do not use
3280                         $to_name = unquote($2);
3281                         $to_name =~ s!^b/!!;
3282                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3283                         # $1 is 'cc' or 'combined', which we do not use
3284                         $to_name = unquote($2);
3285                 } else {
3286                         $to_name = undef;
3287                 }
3288
3289                 # check if current patch belong to current raw line
3290                 # and parse raw git-diff line if needed
3291                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3292                         # this is continuation of a split patch
3293                         print "<div class=\"patch cont\">\n";
3294                 } else {
3295                         # advance raw git-diff output if needed
3296                         $patch_idx++ if defined $diffinfo;
3297
3298                         # read and prepare patch information
3299                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3300
3301                         # compact combined diff output can have some patches skipped
3302                         # find which patch (using pathname of result) we are at now;
3303                         if ($is_combined) {
3304                                 while ($to_name ne $diffinfo->{'to_file'}) {
3305                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3306                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3307                                               "</div>\n";  # class="patch"
3308
3309                                         $patch_idx++;
3310                                         $patch_number++;
3311
3312                                         last if $patch_idx > $#$difftree;
3313                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3314                                 }
3315                         }
3316
3317                         # modifies %from, %to hashes
3318                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3319
3320                         # this is first patch for raw difftree line with $patch_idx index
3321                         # we index @$difftree array from 0, but number patches from 1
3322                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3323                 }
3324
3325                 # git diff header
3326                 #assert($patch_line =~ m/^diff /) if DEBUG;
3327                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3328                 $patch_number++;
3329                 # print "git diff" header
3330                 print format_git_diff_header_line($patch_line, $diffinfo,
3331                                                   \%from, \%to);
3332
3333                 # print extended diff header
3334                 print "<div class=\"diff extended_header\">\n";
3335         EXTENDED_HEADER:
3336                 while ($patch_line = <$fd>) {
3337                         chomp $patch_line;
3338
3339                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3340
3341                         print format_extended_diff_header_line($patch_line, $diffinfo,
3342                                                                \%from, \%to);
3343                 }
3344                 print "</div>\n"; # class="diff extended_header"
3345
3346                 # from-file/to-file diff header
3347                 if (! $patch_line) {
3348                         print "</div>\n"; # class="patch"
3349                         last PATCH;
3350                 }
3351                 next PATCH if ($patch_line =~ m/^diff /);
3352                 #assert($patch_line =~ m/^---/) if DEBUG;
3353
3354                 my $last_patch_line = $patch_line;
3355                 $patch_line = <$fd>;
3356                 chomp $patch_line;
3357                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3358
3359                 print format_diff_from_to_header($last_patch_line, $patch_line,
3360                                                  $diffinfo, \%from, \%to,
3361                                                  @hash_parents);
3362
3363                 # the patch itself
3364         LINE:
3365                 while ($patch_line = <$fd>) {
3366                         chomp $patch_line;
3367
3368                         next PATCH if ($patch_line =~ m/^diff /);
3369
3370                         print format_diff_line($patch_line, \%from, \%to);
3371                 }
3372
3373         } continue {
3374                 print "</div>\n"; # class="patch"
3375         }
3376
3377         # for compact combined (--cc) format, with chunk and patch simpliciaction
3378         # patchset might be empty, but there might be unprocessed raw lines
3379         for (++$patch_idx if $patch_number > 0;
3380              $patch_idx < @$difftree;
3381              ++$patch_idx) {
3382                 # read and prepare patch information
3383                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3384
3385                 # generate anchor for "patch" links in difftree / whatchanged part
3386                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3387                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3388                       "</div>\n";  # class="patch"
3389
3390                 $patch_number++;
3391         }
3392
3393         if ($patch_number == 0) {
3394                 if (@hash_parents > 1) {
3395                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3396                 } else {
3397                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3398                 }
3399         }
3400
3401         print "</div>\n"; # class="patchset"
3402 }
3403
3404 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3405
3406 sub git_project_list_body {
3407         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3408
3409         my ($check_forks) = gitweb_check_feature('forks');
3410
3411         my @projects;
3412         foreach my $pr (@$projlist) {
3413                 my (@aa) = git_get_last_activity($pr->{'path'});
3414                 unless (@aa) {
3415                         next;
3416                 }
3417                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3418                 if (!defined $pr->{'descr'}) {
3419                         my $descr = git_get_project_description($pr->{'path'}) || "";
3420                         $pr->{'descr_long'} = to_utf8($descr);
3421                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3422                 }
3423                 if (!defined $pr->{'owner'}) {
3424                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3425                 }
3426                 if ($check_forks) {
3427                         my $pname = $pr->{'path'};
3428                         if (($pname =~ s/\.git$//) &&
3429                             ($pname !~ /\/$/) &&
3430                             (-d "$projectroot/$pname")) {
3431                                 $pr->{'forks'} = "-d $projectroot/$pname";
3432                         }
3433                         else {
3434                                 $pr->{'forks'} = 0;
3435                         }
3436                 }
3437                 push @projects, $pr;
3438         }
3439
3440         $order ||= $default_projects_order;
3441         $from = 0 unless defined $from;
3442         $to = $#projects if (!defined $to || $#projects < $to);
3443
3444         print "<table class=\"project_list\">\n";
3445         unless ($no_header) {
3446                 print "<tr>\n";
3447                 if ($check_forks) {
3448                         print "<th></th>\n";
3449                 }
3450                 if ($order eq "project") {
3451                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3452                         print "<th>Project</th>\n";
3453                 } else {
3454                         print "<th>" .
3455                               $cgi->a({-href => href(project=>undef, order=>'project'),
3456                                        -class => "header"}, "Project") .
3457                               "</th>\n";
3458                 }
3459                 if ($order eq "descr") {
3460                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3461                         print "<th>Description</th>\n";
3462                 } else {
3463                         print "<th>" .
3464                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3465                                        -class => "header"}, "Description") .
3466                               "</th>\n";
3467                 }
3468                 if ($order eq "owner") {
3469                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3470                         print "<th>Owner</th>\n";
3471                 } else {
3472                         print "<th>" .
3473                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3474                                        -class => "header"}, "Owner") .
3475                               "</th>\n";
3476                 }
3477                 if ($order eq "age") {
3478                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3479                         print "<th>Last Change</th>\n";
3480                 } else {
3481                         print "<th>" .
3482                               $cgi->a({-href => href(project=>undef, order=>'age'),
3483                                        -class => "header"}, "Last Change") .
3484                               "</th>\n";
3485                 }
3486                 print "<th></th>\n" .
3487                       "</tr>\n";
3488         }
3489         my $alternate = 1;
3490         for (my $i = $from; $i <= $to; $i++) {
3491                 my $pr = $projects[$i];
3492                 if ($alternate) {
3493                         print "<tr class=\"dark\">\n";
3494                 } else {
3495                         print "<tr class=\"light\">\n";
3496                 }
3497                 $alternate ^= 1;
3498                 if ($check_forks) {
3499                         print "<td>";
3500                         if ($pr->{'forks'}) {
3501                                 print "<!-- $pr->{'forks'} -->\n";
3502                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3503                         }
3504                         print "</td>\n";
3505                 }
3506                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3507                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3508                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3509                                         -class => "list", -title => $pr->{'descr_long'}},
3510                                         esc_html($pr->{'descr'})) . "</td>\n" .
3511                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3512                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3513                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3514                       "<td class=\"link\">" .
3515                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3516                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3517                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3518                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3519                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3520                       "</td>\n" .
3521                       "</tr>\n";
3522         }
3523         if (defined $extra) {
3524                 print "<tr>\n";
3525                 if ($check_forks) {
3526                         print "<td></td>\n";
3527                 }
3528                 print "<td colspan=\"5\">$extra</td>\n" .
3529                       "</tr>\n";
3530         }
3531         print "</table>\n";
3532 }
3533
3534 sub git_shortlog_body {
3535         # uses global variable $project
3536         my ($commitlist, $from, $to, $refs, $extra) = @_;
3537
3538         $from = 0 unless defined $from;
3539         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3540
3541         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3542         my $alternate = 1;
3543         for (my $i = $from; $i <= $to; $i++) {
3544                 my %co = %{$commitlist->[$i]};
3545                 my $commit = $co{'id'};
3546                 my $ref = format_ref_marker($refs, $commit);
3547                 if ($alternate) {
3548                         print "<tr class=\"dark\">\n";
3549                 } else {
3550                         print "<tr class=\"light\">\n";
3551                 }
3552                 $alternate ^= 1;
3553                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3554                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3555                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3556                       "<td><i>" . $author . "</i></td>\n" .
3557                       "<td>";
3558                 print format_subject_html($co{'title'}, $co{'title_short'},
3559                                           href(action=>"commit", hash=>$commit), $ref);
3560                 print "</td>\n" .
3561                       "<td class=\"link\">" .
3562                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3563                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3564                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3565                 my $snapshot_links = format_snapshot_links($commit);
3566                 if (defined $snapshot_links) {
3567                         print " | " . $snapshot_links;
3568                 }
3569                 print "</td>\n" .
3570                       "</tr>\n";
3571         }
3572         if (defined $extra) {
3573                 print "<tr>\n" .
3574                       "<td colspan=\"4\">$extra</td>\n" .
3575                       "</tr>\n";
3576         }
3577         print "</table>\n";
3578 }
3579
3580 sub git_history_body {
3581         # Warning: assumes constant type (blob or tree) during history
3582         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3583
3584         $from = 0 unless defined $from;
3585         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3586
3587         print "<table class=\"history\" cellspacing=\"0\">\n";
3588         my $alternate = 1;
3589         for (my $i = $from; $i <= $to; $i++) {
3590                 my %co = %{$commitlist->[$i]};
3591                 if (!%co) {
3592                         next;
3593                 }
3594                 my $commit = $co{'id'};
3595
3596                 my $ref = format_ref_marker($refs, $commit);
3597
3598                 if ($alternate) {
3599                         print "<tr class=\"dark\">\n";
3600                 } else {
3601                         print "<tr class=\"light\">\n";
3602                 }
3603                 $alternate ^= 1;
3604         # shortlog uses      chop_str($co{'author_name'}, 10)
3605                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3606                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3607                       "<td><i>" . $author . "</i></td>\n" .
3608                       "<td>";
3609                 # originally git_history used chop_str($co{'title'}, 50)
3610                 print format_subject_html($co{'title'}, $co{'title_short'},
3611                                           href(action=>"commit", hash=>$commit), $ref);
3612                 print "</td>\n" .
3613                       "<td class=\"link\">" .
3614                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3615                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3616
3617                 if ($ftype eq 'blob') {
3618                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3619                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3620                         if (defined $blob_current && defined $blob_parent &&
3621                                         $blob_current ne $blob_parent) {
3622                                 print " | " .
3623                                         $cgi->a({-href => href(action=>"blobdiff",
3624                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3625                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3626                                                                file_name=>$file_name)},
3627                                                 "diff to current");
3628                         }
3629                 }
3630                 print "</td>\n" .
3631                       "</tr>\n";
3632         }
3633         if (defined $extra) {
3634                 print "<tr>\n" .
3635                       "<td colspan=\"4\">$extra</td>\n" .
3636                       "</tr>\n";
3637         }
3638         print "</table>\n";
3639 }
3640
3641 sub git_tags_body {
3642         # uses global variable $project
3643         my ($taglist, $from, $to, $extra) = @_;
3644         $from = 0 unless defined $from;
3645         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3646
3647         print "<table class=\"tags\" cellspacing=\"0\">\n";
3648         my $alternate = 1;
3649         for (my $i = $from; $i <= $to; $i++) {
3650                 my $entry = $taglist->[$i];
3651                 my %tag = %$entry;
3652                 my $comment = $tag{'subject'};
3653                 my $comment_short;
3654                 if (defined $comment) {
3655                         $comment_short = chop_str($comment, 30, 5);
3656                 }
3657                 if ($alternate) {
3658                         print "<tr class=\"dark\">\n";
3659                 } else {
3660                         print "<tr class=\"light\">\n";
3661                 }
3662                 $alternate ^= 1;
3663                 if (defined $tag{'age'}) {
3664                         print "<td><i>$tag{'age'}</i></td>\n";
3665                 } else {
3666                         print "<td></td>\n";
3667                 }
3668                 print "<td>" .
3669                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3670                                -class => "list name"}, esc_html($tag{'name'})) .
3671                       "</td>\n" .
3672                       "<td>";
3673                 if (defined $comment) {
3674                         print format_subject_html($comment, $comment_short,
3675                                                   href(action=>"tag", hash=>$tag{'id'}));
3676                 }
3677                 print "</td>\n" .
3678                       "<td class=\"selflink\">";
3679                 if ($tag{'type'} eq "tag") {
3680                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3681                 } else {
3682                         print "&nbsp;";
3683                 }
3684                 print "</td>\n" .
3685                       "<td class=\"link\">" . " | " .
3686                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3687                 if ($tag{'reftype'} eq "commit") {
3688                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3689                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3690                 } elsif ($tag{'reftype'} eq "blob") {
3691                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3692                 }
3693                 print "</td>\n" .
3694                       "</tr>";
3695         }
3696         if (defined $extra) {
3697                 print "<tr>\n" .
3698                       "<td colspan=\"5\">$extra</td>\n" .
3699                       "</tr>\n";
3700         }
3701         print "</table>\n";
3702 }
3703
3704 sub git_heads_body {
3705         # uses global variable $project
3706         my ($headlist, $head, $from, $to, $extra) = @_;
3707         $from = 0 unless defined $from;
3708         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3709
3710         print "<table class=\"heads\" cellspacing=\"0\">\n";
3711         my $alternate = 1;
3712         for (my $i = $from; $i <= $to; $i++) {
3713                 my $entry = $headlist->[$i];
3714                 my %ref = %$entry;
3715                 my $curr = $ref{'id'} eq $head;
3716                 if ($alternate) {
3717                         print "<tr class=\"dark\">\n";
3718                 } else {
3719                         print "<tr class=\"light\">\n";
3720                 }
3721                 $alternate ^= 1;
3722                 print "<td><i>$ref{'age'}</i></td>\n" .
3723                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3724                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3725                                -class => "list name"},esc_html($ref{'name'})) .
3726                       "</td>\n" .
3727                       "<td class=\"link\">" .
3728                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3729                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3730                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3731                       "</td>\n" .
3732                       "</tr>";
3733         }
3734         if (defined $extra) {
3735                 print "<tr>\n" .
3736                       "<td colspan=\"3\">$extra</td>\n" .
3737                       "</tr>\n";
3738         }
3739         print "</table>\n";
3740 }
3741
3742 sub git_search_grep_body {
3743         my ($commitlist, $from, $to, $extra) = @_;
3744         $from = 0 unless defined $from;
3745         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3746
3747         print "<table class=\"grep\" cellspacing=\"0\">\n";
3748         my $alternate = 1;
3749         for (my $i = $from; $i <= $to; $i++) {
3750                 my %co = %{$commitlist->[$i]};
3751                 if (!%co) {
3752                         next;
3753                 }
3754                 my $commit = $co{'id'};
3755                 if ($alternate) {
3756                         print "<tr class=\"dark\">\n";
3757                 } else {
3758                         print "<tr class=\"light\">\n";
3759                 }
3760                 $alternate ^= 1;
3761                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3762                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3763                       "<td><i>" . $author . "</i></td>\n" .
3764                       "<td>" .
3765                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3766                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3767                 my $comment = $co{'comment'};
3768                 foreach my $line (@$comment) {
3769                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3770                                 my $lead = esc_html($1) || "";
3771                                 $lead = chop_str($lead, 30, 10);
3772                                 my $match = esc_html($2) || "";
3773                                 my $trail = esc_html($3) || "";
3774                                 $trail = chop_str($trail, 30, 10);
3775                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3776                                 print chop_str($text, 80, 5) . "<br/>\n";
3777                         }
3778                 }
3779                 print "</td>\n" .
3780                       "<td class=\"link\">" .
3781                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3782                       " | " .
3783                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3784                 print "</td>\n" .
3785                       "</tr>\n";
3786         }
3787         if (defined $extra) {
3788                 print "<tr>\n" .
3789                       "<td colspan=\"3\">$extra</td>\n" .
3790                       "</tr>\n";
3791         }
3792         print "</table>\n";
3793 }
3794
3795 ## ======================================================================
3796 ## ======================================================================
3797 ## actions
3798
3799 sub git_project_list {
3800         my $order = $cgi->param('o');
3801         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3802                 die_error(undef, "Unknown order parameter");
3803         }
3804
3805         my @list = git_get_projects_list();
3806         if (!@list) {
3807                 die_error(undef, "No projects found");
3808         }
3809
3810         git_header_html();
3811         if (-f $home_text) {
3812                 print "<div class=\"index_include\">\n";
3813                 open (my $fd, $home_text);
3814                 print <$fd>;
3815                 close $fd;
3816                 print "</div>\n";
3817         }
3818         git_project_list_body(\@list, $order);
3819         git_footer_html();
3820 }
3821
3822 sub git_forks {
3823         my $order = $cgi->param('o');
3824         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3825                 die_error(undef, "Unknown order parameter");
3826         }
3827
3828         my @list = git_get_projects_list($project);
3829         if (!@list) {
3830                 die_error(undef, "No forks found");
3831         }
3832
3833         git_header_html();
3834         git_print_page_nav('','');
3835         git_print_header_div('summary', "$project forks");
3836         git_project_list_body(\@list, $order);
3837         git_footer_html();
3838 }
3839
3840 sub git_project_index {
3841         my @projects = git_get_projects_list($project);
3842
3843         print $cgi->header(
3844                 -type => 'text/plain',
3845                 -charset => 'utf-8',
3846                 -content_disposition => 'inline; filename="index.aux"');
3847
3848         foreach my $pr (@projects) {
3849                 if (!exists $pr->{'owner'}) {
3850                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3851                 }
3852
3853                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3854                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3855                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3856                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3857                 $path  =~ s/ /\+/g;
3858                 $owner =~ s/ /\+/g;
3859
3860                 print "$path $owner\n";
3861         }
3862 }
3863
3864 sub git_summary {
3865         my $descr = git_get_project_description($project) || "none";
3866         my %co = parse_commit("HEAD");
3867         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3868         my $head = $co{'id'};
3869
3870         my $owner = git_get_project_owner($project);
3871
3872         my $refs = git_get_references();
3873         # These get_*_list functions return one more to allow us to see if
3874         # there are more ...
3875         my @taglist  = git_get_tags_list(16);
3876         my @headlist = git_get_heads_list(16);
3877         my @forklist;
3878         my ($check_forks) = gitweb_check_feature('forks');
3879
3880         if ($check_forks) {
3881                 @forklist = git_get_projects_list($project);
3882         }
3883
3884         git_header_html();
3885         git_print_page_nav('summary','', $head);
3886
3887         print "<div class=\"title\">&nbsp;</div>\n";
3888         print "<table cellspacing=\"0\">\n" .
3889               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3890               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3891         if (defined $cd{'rfc2822'}) {
3892                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3893         }
3894
3895         # use per project git URL list in $projectroot/$project/cloneurl
3896         # or make project git URL from git base URL and project name
3897         my $url_tag = "URL";
3898         my @url_list = git_get_project_url_list($project);
3899         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3900         foreach my $git_url (@url_list) {
3901                 next unless $git_url;
3902                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3903                 $url_tag = "";
3904         }
3905         print "</table>\n";
3906
3907         if (-s "$projectroot/$project/README.html") {
3908                 if (open my $fd, "$projectroot/$project/README.html") {
3909                         print "<div class=\"title\">readme</div>\n";
3910                         print $_ while (<$fd>);
3911                         close $fd;
3912                 }
3913         }
3914
3915         # we need to request one more than 16 (0..15) to check if
3916         # those 16 are all
3917         my @commitlist = $head ? parse_commits($head, 17) : ();
3918         if (@commitlist) {
3919                 git_print_header_div('shortlog');
3920                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3921                                   $#commitlist <=  15 ? undef :
3922                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3923         }
3924
3925         if (@taglist) {
3926                 git_print_header_div('tags');
3927                 git_tags_body(\@taglist, 0, 15,
3928                               $#taglist <=  15 ? undef :
3929                               $cgi->a({-href => href(action=>"tags")}, "..."));
3930         }
3931
3932         if (@headlist) {
3933                 git_print_header_div('heads');
3934                 git_heads_body(\@headlist, $head, 0, 15,
3935                                $#headlist <= 15 ? undef :
3936                                $cgi->a({-href => href(action=>"heads")}, "..."));
3937         }
3938
3939         if (@forklist) {
3940                 git_print_header_div('forks');
3941                 git_project_list_body(\@forklist, undef, 0, 15,
3942                                       $#forklist <= 15 ? undef :
3943                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3944                                       'noheader');
3945         }
3946
3947         git_footer_html();
3948 }
3949
3950 sub git_tag {
3951         my $head = git_get_head_hash($project);
3952         git_header_html();
3953         git_print_page_nav('','', $head,undef,$head);
3954         my %tag = parse_tag($hash);
3955
3956         if (! %tag) {
3957                 die_error(undef, "Unknown tag object");
3958         }
3959
3960         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3961         print "<div class=\"title_text\">\n" .
3962               "<table cellspacing=\"0\">\n" .
3963               "<tr>\n" .
3964               "<td>object</td>\n" .
3965               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3966                                $tag{'object'}) . "</td>\n" .
3967               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3968                                               $tag{'type'}) . "</td>\n" .
3969               "</tr>\n";
3970         if (defined($tag{'author'})) {
3971                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3972                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3973                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3974                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3975                         "</td></tr>\n";
3976         }
3977         print "</table>\n\n" .
3978               "</div>\n";
3979         print "<div class=\"page_body\">";
3980         my $comment = $tag{'comment'};
3981         foreach my $line (@$comment) {
3982                 chomp $line;
3983                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3984         }
3985         print "</div>\n";
3986         git_footer_html();
3987 }
3988
3989 sub git_blame2 {
3990         my $fd;
3991         my $ftype;
3992
3993         my ($have_blame) = gitweb_check_feature('blame');
3994         if (!$have_blame) {
3995                 die_error('403 Permission denied', "Permission denied");
3996         }
3997         die_error('404 Not Found', "File name not defined") if (!$file_name);
3998         $hash_base ||= git_get_head_hash($project);
3999         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4000         my %co = parse_commit($hash_base)
4001                 or die_error(undef, "Reading commit failed");
4002         if (!defined $hash) {
4003                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4004                         or die_error(undef, "Error looking up file");
4005         }
4006         $ftype = git_get_type($hash);
4007         if ($ftype !~ "blob") {
4008                 die_error('400 Bad Request', "Object is not a blob");
4009         }
4010         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4011               $file_name, $hash_base)
4012                 or die_error(undef, "Open git-blame failed");
4013         git_header_html();
4014         my $formats_nav =
4015                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4016                         "blob") .
4017                 " | " .
4018                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4019                         "history") .
4020                 " | " .
4021                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4022                         "HEAD");
4023         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4024         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4025         git_print_page_path($file_name, $ftype, $hash_base);
4026         my @rev_color = (qw(light2 dark2));
4027         my $num_colors = scalar(@rev_color);
4028         my $current_color = 0;
4029         my $last_rev;
4030         print <<HTML;
4031 <div class="page_body">
4032 <table class="blame">
4033 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4034 HTML
4035         my %metainfo = ();
4036         while (1) {
4037                 $_ = <$fd>;
4038                 last unless defined $_;
4039                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4040                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4041                 if (!exists $metainfo{$full_rev}) {
4042                         $metainfo{$full_rev} = {};
4043                 }
4044                 my $meta = $metainfo{$full_rev};
4045                 while (<$fd>) {
4046                         last if (s/^\t//);
4047                         if (/^(\S+) (.*)$/) {
4048                                 $meta->{$1} = $2;
4049                         }
4050                 }
4051                 my $data = $_;
4052                 chomp $data;
4053                 my $rev = substr($full_rev, 0, 8);
4054                 my $author = $meta->{'author'};
4055                 my %date = parse_date($meta->{'author-time'},
4056                                       $meta->{'author-tz'});
4057                 my $date = $date{'iso-tz'};
4058                 if ($group_size) {
4059                         $current_color = ++$current_color % $num_colors;
4060                 }
4061                 print "<tr class=\"$rev_color[$current_color]\">\n";
4062                 if ($group_size) {
4063                         print "<td class=\"sha1\"";
4064                         print " title=\"". esc_html($author) . ", $date\"";
4065                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4066                         print ">";
4067                         print $cgi->a({-href => href(action=>"commit",
4068                                                      hash=>$full_rev,
4069                                                      file_name=>$file_name)},
4070                                       esc_html($rev));
4071                         print "</td>\n";
4072                 }
4073                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4074                         or die_error(undef, "Open git-rev-parse failed");
4075                 my $parent_commit = <$dd>;
4076                 close $dd;
4077                 chomp($parent_commit);
4078                 my $blamed = href(action => 'blame',
4079                                   file_name => $meta->{'filename'},
4080                                   hash_base => $parent_commit);
4081                 print "<td class=\"linenr\">";
4082                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4083                                 -id => "l$lineno",
4084                                 -class => "linenr" },
4085                               esc_html($lineno));
4086                 print "</td>";
4087                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4088                 print "</tr>\n";
4089         }
4090         print "</table>\n";
4091         print "</div>";
4092         close $fd
4093                 or print "Reading blob failed\n";
4094         git_footer_html();
4095 }
4096
4097 sub git_blame {
4098         my $fd;
4099
4100         my ($have_blame) = gitweb_check_feature('blame');
4101         if (!$have_blame) {
4102                 die_error('403 Permission denied', "Permission denied");
4103         }
4104         die_error('404 Not Found', "File name not defined") if (!$file_name);
4105         $hash_base ||= git_get_head_hash($project);
4106         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4107         my %co = parse_commit($hash_base)
4108                 or die_error(undef, "Reading commit failed");
4109         if (!defined $hash) {
4110                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4111                         or die_error(undef, "Error lookup file");
4112         }
4113         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4114                 or die_error(undef, "Open git-annotate failed");
4115         git_header_html();
4116         my $formats_nav =
4117                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4118                         "blob") .
4119                 " | " .
4120                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4121                         "history") .
4122                 " | " .
4123                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4124                         "HEAD");
4125         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4126         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4127         git_print_page_path($file_name, 'blob', $hash_base);
4128         print "<div class=\"page_body\">\n";
4129         print <<HTML;
4130 <table class="blame">
4131   <tr>
4132     <th>Commit</th>
4133     <th>Age</th>
4134     <th>Author</th>
4135     <th>Line</th>
4136     <th>Data</th>
4137   </tr>
4138 HTML
4139         my @line_class = (qw(light dark));
4140         my $line_class_len = scalar (@line_class);
4141         my $line_class_num = $#line_class;
4142         while (my $line = <$fd>) {
4143                 my $long_rev;
4144                 my $short_rev;
4145                 my $author;
4146                 my $time;
4147                 my $lineno;
4148                 my $data;
4149                 my $age;
4150                 my $age_str;
4151                 my $age_class;
4152
4153                 chomp $line;
4154                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4155
4156                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4157                         $long_rev = $1;
4158                         $author   = $2;
4159                         $time     = $3;
4160                         $lineno   = $4;
4161                         $data     = $5;
4162                 } else {
4163                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4164                         next;
4165                 }
4166                 $short_rev  = substr ($long_rev, 0, 8);
4167                 $age        = time () - $time;
4168                 $age_str    = age_string ($age);
4169                 $age_str    =~ s/ /&nbsp;/g;
4170                 $age_class  = age_class($age);
4171                 $author     = esc_html ($author);
4172                 $author     =~ s/ /&nbsp;/g;
4173
4174                 $data = untabify($data);
4175                 $data = esc_html ($data);
4176
4177                 print <<HTML;
4178   <tr class="$line_class[$line_class_num]">
4179     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4180     <td class="$age_class">$age_str</td>
4181     <td>$author</td>
4182     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4183     <td class="pre">$data</td>
4184   </tr>
4185 HTML
4186         } # while (my $line = <$fd>)
4187         print "</table>\n\n";
4188         close $fd
4189                 or print "Reading blob failed.\n";
4190         print "</div>";
4191         git_footer_html();
4192 }
4193
4194 sub git_tags {
4195         my $head = git_get_head_hash($project);
4196         git_header_html();
4197         git_print_page_nav('','', $head,undef,$head);
4198         git_print_header_div('summary', $project);
4199
4200         my @tagslist = git_get_tags_list();
4201         if (@tagslist) {
4202                 git_tags_body(\@tagslist);
4203         }
4204         git_footer_html();
4205 }
4206
4207 sub git_heads {
4208         my $head = git_get_head_hash($project);
4209         git_header_html();
4210         git_print_page_nav('','', $head,undef,$head);
4211         git_print_header_div('summary', $project);
4212
4213         my @headslist = git_get_heads_list();
4214         if (@headslist) {
4215                 git_heads_body(\@headslist, $head);
4216         }
4217         git_footer_html();
4218 }
4219
4220 sub git_blob_plain {
4221         my $expires;
4222
4223         if (!defined $hash) {
4224                 if (defined $file_name) {
4225                         my $base = $hash_base || git_get_head_hash($project);
4226                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4227                                 or die_error(undef, "Error lookup file");
4228                 } else {
4229                         die_error(undef, "No file name defined");
4230                 }
4231         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4232                 # blobs defined by non-textual hash id's can be cached
4233                 $expires = "+1d";
4234         }
4235
4236         my $type = shift;
4237         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4238                 or die_error(undef, "Couldn't cat $file_name, $hash");
4239
4240         $type ||= blob_mimetype($fd, $file_name);
4241
4242         # save as filename, even when no $file_name is given
4243         my $save_as = "$hash";
4244         if (defined $file_name) {
4245                 $save_as = $file_name;
4246         } elsif ($type =~ m/^text\//) {
4247                 $save_as .= '.txt';
4248         }
4249
4250         print $cgi->header(
4251                 -type => "$type",
4252                 -expires=>$expires,
4253                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4254         undef $/;
4255         binmode STDOUT, ':raw';
4256         print <$fd>;
4257         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4258         $/ = "\n";
4259         close $fd;
4260 }
4261
4262 sub git_blob {
4263         my $expires;
4264
4265         if (!defined $hash) {
4266                 if (defined $file_name) {
4267                         my $base = $hash_base || git_get_head_hash($project);
4268                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4269                                 or die_error(undef, "Error lookup file");
4270                 } else {
4271                         die_error(undef, "No file name defined");
4272                 }
4273         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4274                 # blobs defined by non-textual hash id's can be cached
4275                 $expires = "+1d";
4276         }
4277
4278         my ($have_blame) = gitweb_check_feature('blame');
4279         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4280                 or die_error(undef, "Couldn't cat $file_name, $hash");
4281         my $mimetype = blob_mimetype($fd, $file_name);
4282         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4283                 close $fd;
4284                 return git_blob_plain($mimetype);
4285         }
4286         # we can have blame only for text/* mimetype
4287         $have_blame &&= ($mimetype =~ m!^text/!);
4288
4289         git_header_html(undef, $expires);
4290         my $formats_nav = '';
4291         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4292                 if (defined $file_name) {
4293                         if ($have_blame) {
4294                                 $formats_nav .=
4295                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4296                                                 "blame") .
4297                                         " | ";
4298                         }
4299                         $formats_nav .=
4300                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4301                                         "history") .
4302                                 " | " .
4303                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4304                                         "raw") .
4305                                 " | " .
4306                                 $cgi->a({-href => href(action=>"blob",
4307                                                        hash_base=>"HEAD", file_name=>$file_name)},
4308                                         "HEAD");
4309                 } else {
4310                         $formats_nav .=
4311                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4312                                         "raw");
4313                 }
4314                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4315                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4316         } else {
4317                 print "<div class=\"page_nav\">\n" .
4318                       "<br/><br/></div>\n" .
4319                       "<div class=\"title\">$hash</div>\n";
4320         }
4321         git_print_page_path($file_name, "blob", $hash_base);
4322         print "<div class=\"page_body\">\n";
4323         if ($mimetype =~ m!^text/!) {
4324                 my $nr;
4325                 while (my $line = <$fd>) {
4326                         chomp $line;
4327                         $nr++;
4328                         $line = untabify($line);
4329                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4330                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4331                 }
4332         } elsif ($mimetype =~ m!^image/!) {
4333                 print qq!<img type="$mimetype"!;
4334                 if ($file_name) {
4335                         print qq! alt="$file_name" title="$file_name"!;
4336                 }
4337                 print qq! src="! .
4338                       href(action=>"blob_plain", hash=>$hash,
4339                            hash_base=>$hash_base, file_name=>$file_name) .
4340                       qq!" />\n!;
4341         }
4342         close $fd
4343                 or print "Reading blob failed.\n";
4344         print "</div>";
4345         git_footer_html();
4346 }
4347
4348 sub git_tree {
4349         if (!defined $hash_base) {
4350                 $hash_base = "HEAD";
4351         }
4352         if (!defined $hash) {
4353                 if (defined $file_name) {
4354                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4355                 } else {
4356                         $hash = $hash_base;
4357                 }
4358         }
4359         $/ = "\0";
4360         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4361                 or die_error(undef, "Open git-ls-tree failed");
4362         my @entries = map { chomp; $_ } <$fd>;
4363         close $fd or die_error(undef, "Reading tree failed");
4364         $/ = "\n";
4365
4366         my $refs = git_get_references();
4367         my $ref = format_ref_marker($refs, $hash_base);
4368         git_header_html();
4369         my $basedir = '';
4370         my ($have_blame) = gitweb_check_feature('blame');
4371         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4372                 my @views_nav = ();
4373                 if (defined $file_name) {
4374                         push @views_nav,
4375                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4376                                         "history"),
4377                                 $cgi->a({-href => href(action=>"tree",
4378                                                        hash_base=>"HEAD", file_name=>$file_name)},
4379                                         "HEAD"),
4380                 }
4381                 my $snapshot_links = format_snapshot_links($hash);
4382                 if (defined $snapshot_links) {
4383                         # FIXME: Should be available when we have no hash base as well.
4384                         push @views_nav, $snapshot_links;
4385                 }
4386                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4387                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4388         } else {
4389                 undef $hash_base;
4390                 print "<div class=\"page_nav\">\n";
4391                 print "<br/><br/></div>\n";
4392                 print "<div class=\"title\">$hash</div>\n";
4393         }
4394         if (defined $file_name) {
4395                 $basedir = $file_name;
4396                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4397                         $basedir .= '/';
4398                 }
4399         }
4400         git_print_page_path($file_name, 'tree', $hash_base);
4401         print "<div class=\"page_body\">\n";
4402         print "<table cellspacing=\"0\">\n";
4403         my $alternate = 1;
4404         # '..' (top directory) link if possible
4405         if (defined $hash_base &&
4406             defined $file_name && $file_name =~ m![^/]+$!) {
4407                 if ($alternate) {
4408                         print "<tr class=\"dark\">\n";
4409                 } else {
4410                         print "<tr class=\"light\">\n";
4411                 }
4412                 $alternate ^= 1;
4413
4414                 my $up = $file_name;
4415                 $up =~ s!/?[^/]+$!!;
4416                 undef $up unless $up;
4417                 # based on git_print_tree_entry
4418                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4419                 print '<td class="list">';
4420                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4421                                              file_name=>$up)},
4422                               "..");
4423                 print "</td>\n";
4424                 print "<td class=\"link\"></td>\n";
4425
4426                 print "</tr>\n";
4427         }
4428         foreach my $line (@entries) {
4429                 my %t = parse_ls_tree_line($line, -z => 1);
4430
4431                 if ($alternate) {
4432                         print "<tr class=\"dark\">\n";
4433                 } else {
4434                         print "<tr class=\"light\">\n";
4435                 }
4436                 $alternate ^= 1;
4437
4438                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4439
4440                 print "</tr>\n";
4441         }
4442         print "</table>\n" .
4443               "</div>";
4444         git_footer_html();
4445 }
4446
4447 sub git_snapshot {
4448         my @supported_fmts = gitweb_check_feature('snapshot');
4449         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4450
4451         my $format = $cgi->param('sf');
4452         if (!@supported_fmts) {
4453                 die_error('403 Permission denied', "Permission denied");
4454         }
4455         # default to first supported snapshot format
4456         $format ||= $supported_fmts[0];
4457         if ($format !~ m/^[a-z0-9]+$/) {
4458                 die_error(undef, "Invalid snapshot format parameter");
4459         } elsif (!exists($known_snapshot_formats{$format})) {
4460                 die_error(undef, "Unknown snapshot format");
4461         } elsif (!grep($_ eq $format, @supported_fmts)) {
4462                 die_error(undef, "Unsupported snapshot format");
4463         }
4464
4465         if (!defined $hash) {
4466                 $hash = git_get_head_hash($project);
4467         }
4468
4469         my $git_command = git_cmd_str();
4470         my $name = $project;
4471         $name =~ s,([^/])/*\.git$,$1,;
4472         $name = basename($name);
4473         my $filename = to_utf8($name);
4474         $name =~ s/\047/\047\\\047\047/g;
4475         my $cmd;
4476         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4477         $cmd = "$git_command archive " .
4478                 "--format=$known_snapshot_formats{$format}{'format'} " .
4479                 "--prefix=\'$name\'/ $hash";
4480         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4481                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4482         }
4483
4484         print $cgi->header(
4485                 -type => $known_snapshot_formats{$format}{'type'},
4486                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4487                 -status => '200 OK');
4488
4489         open my $fd, "-|", $cmd
4490                 or die_error(undef, "Execute git-archive failed");
4491         binmode STDOUT, ':raw';
4492         print <$fd>;
4493         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4494         close $fd;
4495 }
4496
4497 sub git_log {
4498         my $head = git_get_head_hash($project);
4499         if (!defined $hash) {
4500                 $hash = $head;
4501         }
4502         if (!defined $page) {
4503                 $page = 0;
4504         }
4505         my $refs = git_get_references();
4506
4507         my @commitlist = parse_commits($hash, 101, (100 * $page));
4508
4509         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4510
4511         git_header_html();
4512         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4513
4514         if (!@commitlist) {
4515                 my %co = parse_commit($hash);
4516
4517                 git_print_header_div('summary', $project);
4518                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4519         }
4520         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4521         for (my $i = 0; $i <= $to; $i++) {
4522                 my %co = %{$commitlist[$i]};
4523                 next if !%co;
4524                 my $commit = $co{'id'};
4525                 my $ref = format_ref_marker($refs, $commit);
4526                 my %ad = parse_date($co{'author_epoch'});
4527                 git_print_header_div('commit',
4528                                "<span class=\"age\">$co{'age_string'}</span>" .
4529                                esc_html($co{'title'}) . $ref,
4530                                $commit);
4531                 print "<div class=\"title_text\">\n" .
4532                       "<div class=\"log_link\">\n" .
4533                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4534                       " | " .
4535                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4536                       " | " .
4537                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4538                       "<br/>\n" .
4539                       "</div>\n" .
4540                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4541                       "</div>\n";
4542
4543                 print "<div class=\"log_body\">\n";
4544                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4545                 print "</div>\n";
4546         }
4547         if ($#commitlist >= 100) {
4548                 print "<div class=\"page_nav\">\n";
4549                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4550                                -accesskey => "n", -title => "Alt-n"}, "next");
4551                 print "</div>\n";
4552         }
4553         git_footer_html();
4554 }
4555
4556 sub git_commit {
4557         $hash ||= $hash_base || "HEAD";
4558         my %co = parse_commit($hash);
4559         if (!%co) {
4560                 die_error(undef, "Unknown commit object");
4561         }
4562         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4563         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4564
4565         my $parent  = $co{'parent'};
4566         my $parents = $co{'parents'}; # listref
4567
4568         # we need to prepare $formats_nav before any parameter munging
4569         my $formats_nav;
4570         if (!defined $parent) {
4571                 # --root commitdiff
4572                 $formats_nav .= '(initial)';
4573         } elsif (@$parents == 1) {
4574                 # single parent commit
4575                 $formats_nav .=
4576                         '(parent: ' .
4577                         $cgi->a({-href => href(action=>"commit",
4578                                                hash=>$parent)},
4579                                 esc_html(substr($parent, 0, 7))) .
4580                         ')';
4581         } else {
4582                 # merge commit
4583                 $formats_nav .=
4584                         '(merge: ' .
4585                         join(' ', map {
4586                                 $cgi->a({-href => href(action=>"commit",
4587                                                        hash=>$_)},
4588                                         esc_html(substr($_, 0, 7)));
4589                         } @$parents ) .
4590                         ')';
4591         }
4592
4593         if (!defined $parent) {
4594                 $parent = "--root";
4595         }
4596         my @difftree;
4597         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4598                 @diff_opts,
4599                 (@$parents <= 1 ? $parent : '-c'),
4600                 $hash, "--"
4601                 or die_error(undef, "Open git-diff-tree failed");
4602         @difftree = map { chomp; $_ } <$fd>;
4603         close $fd or die_error(undef, "Reading git-diff-tree failed");
4604
4605         # non-textual hash id's can be cached
4606         my $expires;
4607         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4608                 $expires = "+1d";
4609         }
4610         my $refs = git_get_references();
4611         my $ref = format_ref_marker($refs, $co{'id'});
4612
4613         git_header_html(undef, $expires);
4614         git_print_page_nav('commit', '',
4615                            $hash, $co{'tree'}, $hash,
4616                            $formats_nav);
4617
4618         if (defined $co{'parent'}) {
4619                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4620         } else {
4621                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4622         }
4623         print "<div class=\"title_text\">\n" .
4624               "<table cellspacing=\"0\">\n";
4625         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4626               "<tr>" .
4627               "<td></td><td> $ad{'rfc2822'}";
4628         if ($ad{'hour_local'} < 6) {
4629                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4630                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4631         } else {
4632                 printf(" (%02d:%02d %s)",
4633                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4634         }
4635         print "</td>" .
4636               "</tr>\n";
4637         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4638         print "<tr><td></td><td> $cd{'rfc2822'}" .
4639               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4640               "</td></tr>\n";
4641         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4642         print "<tr>" .
4643               "<td>tree</td>" .
4644               "<td class=\"sha1\">" .
4645               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4646                        class => "list"}, $co{'tree'}) .
4647               "</td>" .
4648               "<td class=\"link\">" .
4649               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4650                       "tree");
4651         my $snapshot_links = format_snapshot_links($hash);
4652         if (defined $snapshot_links) {
4653                 print " | " . $snapshot_links;
4654         }
4655         print "</td>" .
4656               "</tr>\n";
4657
4658         foreach my $par (@$parents) {
4659                 print "<tr>" .
4660                       "<td>parent</td>" .
4661                       "<td class=\"sha1\">" .
4662                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4663                                class => "list"}, $par) .
4664                       "</td>" .
4665                       "<td class=\"link\">" .
4666                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4667                       " | " .
4668                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4669                       "</td>" .
4670                       "</tr>\n";
4671         }
4672         print "</table>".
4673               "</div>\n";
4674
4675         print "<div class=\"page_body\">\n";
4676         git_print_log($co{'comment'});
4677         print "</div>\n";
4678
4679         git_difftree_body(\@difftree, $hash, @$parents);
4680
4681         git_footer_html();
4682 }
4683
4684 sub git_object {
4685         # object is defined by:
4686         # - hash or hash_base alone
4687         # - hash_base and file_name
4688         my $type;
4689
4690         # - hash or hash_base alone
4691         if ($hash || ($hash_base && !defined $file_name)) {
4692                 my $object_id = $hash || $hash_base;
4693
4694                 my $git_command = git_cmd_str();
4695                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4696                         or die_error('404 Not Found', "Object does not exist");
4697                 $type = <$fd>;
4698                 chomp $type;
4699                 close $fd
4700                         or die_error('404 Not Found', "Object does not exist");
4701
4702         # - hash_base and file_name
4703         } elsif ($hash_base && defined $file_name) {
4704                 $file_name =~ s,/+$,,;
4705
4706                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4707                         or die_error('404 Not Found', "Base object does not exist");
4708
4709                 # here errors should not hapen
4710                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4711                         or die_error(undef, "Open git-ls-tree failed");
4712                 my $line = <$fd>;
4713                 close $fd;
4714
4715                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4716                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4717                         die_error('404 Not Found', "File or directory for given base does not exist");
4718                 }
4719                 $type = $2;
4720                 $hash = $3;
4721         } else {
4722                 die_error('404 Not Found', "Not enough information to find object");
4723         }
4724
4725         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4726                                           hash=>$hash, hash_base=>$hash_base,
4727                                           file_name=>$file_name),
4728                              -status => '302 Found');
4729 }
4730
4731 sub git_blobdiff {
4732         my $format = shift || 'html';
4733
4734         my $fd;
4735         my @difftree;
4736         my %diffinfo;
4737         my $expires;
4738
4739         # preparing $fd and %diffinfo for git_patchset_body
4740         # new style URI
4741         if (defined $hash_base && defined $hash_parent_base) {
4742                 if (defined $file_name) {
4743                         # read raw output
4744                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4745                                 $hash_parent_base, $hash_base,
4746                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4747                                 or die_error(undef, "Open git-diff-tree failed");
4748                         @difftree = map { chomp; $_ } <$fd>;
4749                         close $fd
4750                                 or die_error(undef, "Reading git-diff-tree failed");
4751                         @difftree
4752                                 or die_error('404 Not Found', "Blob diff not found");
4753
4754                 } elsif (defined $hash &&
4755                          $hash =~ /[0-9a-fA-F]{40}/) {
4756                         # try to find filename from $hash
4757
4758                         # read filtered raw output
4759                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4760                                 $hash_parent_base, $hash_base, "--"
4761                                 or die_error(undef, "Open git-diff-tree failed");
4762                         @difftree =
4763                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4764                                 # $hash == to_id
4765                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4766                                 map { chomp; $_ } <$fd>;
4767                         close $fd
4768                                 or die_error(undef, "Reading git-diff-tree failed");
4769                         @difftree
4770                                 or die_error('404 Not Found', "Blob diff not found");
4771
4772                 } else {
4773                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4774                 }
4775
4776                 if (@difftree > 1) {
4777                         die_error('404 Not Found', "Ambiguous blob diff specification");
4778                 }
4779
4780                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4781                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4782                 $file_name   ||= $diffinfo{'to_file'};
4783
4784                 $hash_parent ||= $diffinfo{'from_id'};
4785                 $hash        ||= $diffinfo{'to_id'};
4786
4787                 # non-textual hash id's can be cached
4788                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4789                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4790                         $expires = '+1d';
4791                 }
4792
4793                 # open patch output
4794                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4795                         '-p', ($format eq 'html' ? "--full-index" : ()),
4796                         $hash_parent_base, $hash_base,
4797                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4798                         or die_error(undef, "Open git-diff-tree failed");
4799         }
4800
4801         # old/legacy style URI
4802         if (!%diffinfo && # if new style URI failed
4803             defined $hash && defined $hash_parent) {
4804                 # fake git-diff-tree raw output
4805                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4806                 $diffinfo{'from_id'} = $hash_parent;
4807                 $diffinfo{'to_id'}   = $hash;
4808                 if (defined $file_name) {
4809                         if (defined $file_parent) {
4810                                 $diffinfo{'status'} = '2';
4811                                 $diffinfo{'from_file'} = $file_parent;
4812                                 $diffinfo{'to_file'}   = $file_name;
4813                         } else { # assume not renamed
4814                                 $diffinfo{'status'} = '1';
4815                                 $diffinfo{'from_file'} = $file_name;
4816                                 $diffinfo{'to_file'}   = $file_name;
4817                         }
4818                 } else { # no filename given
4819                         $diffinfo{'status'} = '2';
4820                         $diffinfo{'from_file'} = $hash_parent;
4821                         $diffinfo{'to_file'}   = $hash;
4822                 }
4823
4824                 # non-textual hash id's can be cached
4825                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4826                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4827                         $expires = '+1d';
4828                 }
4829
4830                 # open patch output
4831                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4832                         '-p', ($format eq 'html' ? "--full-index" : ()),
4833                         $hash_parent, $hash, "--"
4834                         or die_error(undef, "Open git-diff failed");
4835         } else  {
4836                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4837                         unless %diffinfo;
4838         }
4839
4840         # header
4841         if ($format eq 'html') {
4842                 my $formats_nav =
4843                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4844                                 "raw");
4845                 git_header_html(undef, $expires);
4846                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4847                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4848                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4849                 } else {
4850                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4851                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4852                 }
4853                 if (defined $file_name) {
4854                         git_print_page_path($file_name, "blob", $hash_base);
4855                 } else {
4856                         print "<div class=\"page_path\"></div>\n";
4857                 }
4858
4859         } elsif ($format eq 'plain') {
4860                 print $cgi->header(
4861                         -type => 'text/plain',
4862                         -charset => 'utf-8',
4863                         -expires => $expires,
4864                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4865
4866                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4867
4868         } else {
4869                 die_error(undef, "Unknown blobdiff format");
4870         }
4871
4872         # patch
4873         if ($format eq 'html') {
4874                 print "<div class=\"page_body\">\n";
4875
4876                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4877                 close $fd;
4878
4879                 print "</div>\n"; # class="page_body"
4880                 git_footer_html();
4881
4882         } else {
4883                 while (my $line = <$fd>) {
4884                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4885                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4886
4887                         print $line;
4888
4889                         last if $line =~ m!^\+\+\+!;
4890                 }
4891                 local $/ = undef;
4892                 print <$fd>;
4893                 close $fd;
4894         }
4895 }
4896
4897 sub git_blobdiff_plain {
4898         git_blobdiff('plain');
4899 }
4900
4901 sub git_commitdiff {
4902         my $format = shift || 'html';
4903         $hash ||= $hash_base || "HEAD";
4904         my %co = parse_commit($hash);
4905         if (!%co) {
4906                 die_error(undef, "Unknown commit object");
4907         }
4908
4909         # choose format for commitdiff for merge
4910         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4911                 $hash_parent = '--cc';
4912         }
4913         # we need to prepare $formats_nav before almost any parameter munging
4914         my $formats_nav;
4915         if ($format eq 'html') {
4916                 $formats_nav =
4917                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4918                                 "raw");
4919
4920                 if (defined $hash_parent &&
4921                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4922                         # commitdiff with two commits given
4923                         my $hash_parent_short = $hash_parent;
4924                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4925                                 $hash_parent_short = substr($hash_parent, 0, 7);
4926                         }
4927                         $formats_nav .=
4928                                 ' (from';
4929                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4930                                 if ($co{'parents'}[$i] eq $hash_parent) {
4931                                         $formats_nav .= ' parent ' . ($i+1);
4932                                         last;
4933                                 }
4934                         }
4935                         $formats_nav .= ': ' .
4936                                 $cgi->a({-href => href(action=>"commitdiff",
4937                                                        hash=>$hash_parent)},
4938                                         esc_html($hash_parent_short)) .
4939                                 ')';
4940                 } elsif (!$co{'parent'}) {
4941                         # --root commitdiff
4942                         $formats_nav .= ' (initial)';
4943                 } elsif (scalar @{$co{'parents'}} == 1) {
4944                         # single parent commit
4945                         $formats_nav .=
4946                                 ' (parent: ' .
4947                                 $cgi->a({-href => href(action=>"commitdiff",
4948                                                        hash=>$co{'parent'})},
4949                                         esc_html(substr($co{'parent'}, 0, 7))) .
4950                                 ')';
4951                 } else {
4952                         # merge commit
4953                         if ($hash_parent eq '--cc') {
4954                                 $formats_nav .= ' | ' .
4955                                         $cgi->a({-href => href(action=>"commitdiff",
4956                                                                hash=>$hash, hash_parent=>'-c')},
4957                                                 'combined');
4958                         } else { # $hash_parent eq '-c'
4959                                 $formats_nav .= ' | ' .
4960                                         $cgi->a({-href => href(action=>"commitdiff",
4961                                                                hash=>$hash, hash_parent=>'--cc')},
4962                                                 'compact');
4963                         }
4964                         $formats_nav .=
4965                                 ' (merge: ' .
4966                                 join(' ', map {
4967                                         $cgi->a({-href => href(action=>"commitdiff",
4968                                                                hash=>$_)},
4969                                                 esc_html(substr($_, 0, 7)));
4970                                 } @{$co{'parents'}} ) .
4971                                 ')';
4972                 }
4973         }
4974
4975         my $hash_parent_param = $hash_parent;
4976         if (!defined $hash_parent_param) {
4977                 # --cc for multiple parents, --root for parentless
4978                 $hash_parent_param =
4979                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4980         }
4981
4982         # read commitdiff
4983         my $fd;
4984         my @difftree;
4985         if ($format eq 'html') {
4986                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4987                         "--no-commit-id", "--patch-with-raw", "--full-index",
4988                         $hash_parent_param, $hash, "--"
4989                         or die_error(undef, "Open git-diff-tree failed");
4990
4991                 while (my $line = <$fd>) {
4992                         chomp $line;
4993                         # empty line ends raw part of diff-tree output
4994                         last unless $line;
4995                         push @difftree, scalar parse_difftree_raw_line($line);
4996                 }
4997
4998         } elsif ($format eq 'plain') {
4999                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5000                         '-p', $hash_parent_param, $hash, "--"
5001                         or die_error(undef, "Open git-diff-tree failed");
5002
5003         } else {
5004                 die_error(undef, "Unknown commitdiff format");
5005         }
5006
5007         # non-textual hash id's can be cached
5008         my $expires;
5009         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5010                 $expires = "+1d";
5011         }
5012
5013         # write commit message
5014         if ($format eq 'html') {
5015                 my $refs = git_get_references();
5016                 my $ref = format_ref_marker($refs, $co{'id'});
5017
5018                 git_header_html(undef, $expires);
5019                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5020                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5021                 git_print_authorship(\%co);
5022                 print "<div class=\"page_body\">\n";
5023                 if (@{$co{'comment'}} > 1) {
5024                         print "<div class=\"log\">\n";
5025                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5026                         print "</div>\n"; # class="log"
5027                 }
5028
5029         } elsif ($format eq 'plain') {
5030                 my $refs = git_get_references("tags");
5031                 my $tagname = git_get_rev_name_tags($hash);
5032                 my $filename = basename($project) . "-$hash.patch";
5033
5034                 print $cgi->header(
5035                         -type => 'text/plain',
5036                         -charset => 'utf-8',
5037                         -expires => $expires,
5038                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5039                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5040                 print <<TEXT;
5041 From: $co{'author'}
5042 Date: $ad{'rfc2822'} ($ad{'tz_local'})
5043 Subject: $co{'title'}
5044 TEXT
5045                 print "X-Git-Tag: $tagname\n" if $tagname;
5046                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5047
5048                 foreach my $line (@{$co{'comment'}}) {
5049                         print "$line\n";
5050                 }
5051                 print "---\n\n";
5052         }
5053
5054         # write patch
5055         if ($format eq 'html') {
5056                 my $use_parents = !defined $hash_parent ||
5057                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5058                 git_difftree_body(\@difftree, $hash,
5059                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5060                 print "<br/>\n";
5061
5062                 git_patchset_body($fd, \@difftree, $hash,
5063                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5064                 close $fd;
5065                 print "</div>\n"; # class="page_body"
5066                 git_footer_html();
5067
5068         } elsif ($format eq 'plain') {
5069                 local $/ = undef;
5070                 print <$fd>;
5071                 close $fd
5072                         or print "Reading git-diff-tree failed\n";
5073         }
5074 }
5075
5076 sub git_commitdiff_plain {
5077         git_commitdiff('plain');
5078 }
5079
5080 sub git_history {
5081         if (!defined $hash_base) {
5082                 $hash_base = git_get_head_hash($project);
5083         }
5084         if (!defined $page) {
5085                 $page = 0;
5086         }
5087         my $ftype;
5088         my %co = parse_commit($hash_base);
5089         if (!%co) {
5090                 die_error(undef, "Unknown commit object");
5091         }
5092
5093         my $refs = git_get_references();
5094         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5095
5096         if (!defined $hash && defined $file_name) {
5097                 $hash = git_get_hash_by_path($hash_base, $file_name);
5098         }
5099         if (defined $hash) {
5100                 $ftype = git_get_type($hash);
5101         }
5102
5103         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5104
5105         my $paging_nav = '';
5106         if ($page > 0) {
5107                 $paging_nav .=
5108                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5109                                                file_name=>$file_name)},
5110                                 "first");
5111                 $paging_nav .= " &sdot; " .
5112                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5113                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5114         } else {
5115                 $paging_nav .= "first";
5116                 $paging_nav .= " &sdot; prev";
5117         }
5118         my $next_link = '';
5119         if ($#commitlist >= 100) {
5120                 $next_link =
5121                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5122                                  -accesskey => "n", -title => "Alt-n"}, "next");
5123                 $paging_nav .= " &sdot; $next_link";
5124         } else {
5125                 $paging_nav .= " &sdot; next";
5126         }
5127
5128         git_header_html();
5129         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5130         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5131         git_print_page_path($file_name, $ftype, $hash_base);
5132
5133         git_history_body(\@commitlist, 0, 99,
5134                          $refs, $hash_base, $ftype, $next_link);
5135
5136         git_footer_html();
5137 }
5138
5139 sub git_search {
5140         my ($have_search) = gitweb_check_feature('search');
5141         if (!$have_search) {
5142                 die_error('403 Permission denied', "Permission denied");
5143         }
5144         if (!defined $searchtext) {
5145                 die_error(undef, "Text field empty");
5146         }
5147         if (!defined $hash) {
5148                 $hash = git_get_head_hash($project);
5149         }
5150         my %co = parse_commit($hash);
5151         if (!%co) {
5152                 die_error(undef, "Unknown commit object");
5153         }
5154         if (!defined $page) {
5155                 $page = 0;
5156         }
5157
5158         $searchtype ||= 'commit';
5159         if ($searchtype eq 'pickaxe') {
5160                 # pickaxe may take all resources of your box and run for several minutes
5161                 # with every query - so decide by yourself how public you make this feature
5162                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5163                 if (!$have_pickaxe) {
5164                         die_error('403 Permission denied', "Permission denied");
5165                 }
5166         }
5167         if ($searchtype eq 'grep') {
5168                 my ($have_grep) = gitweb_check_feature('grep');
5169                 if (!$have_grep) {
5170                         die_error('403 Permission denied', "Permission denied");
5171                 }
5172         }
5173
5174         git_header_html();
5175
5176         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5177                 my $greptype;
5178                 if ($searchtype eq 'commit') {
5179                         $greptype = "--grep=";
5180                 } elsif ($searchtype eq 'author') {
5181                         $greptype = "--author=";
5182                 } elsif ($searchtype eq 'committer') {
5183                         $greptype = "--committer=";
5184                 }
5185                 $greptype .= $search_regexp;
5186                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5187
5188                 my $paging_nav = '';
5189                 if ($page > 0) {
5190                         $paging_nav .=
5191                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5192                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5193                                         "first");
5194                         $paging_nav .= " &sdot; " .
5195                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5196                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5197                 } else {
5198                         $paging_nav .= "first";
5199                         $paging_nav .= " &sdot; prev";
5200                 }
5201                 my $next_link = '';
5202                 if ($#commitlist >= 100) {
5203                         $next_link =
5204                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5205                                          -accesskey => "n", -title => "Alt-n"}, "next");
5206                         $paging_nav .= " &sdot; $next_link";
5207                 } else {
5208                         $paging_nav .= " &sdot; next";
5209                 }
5210
5211                 if ($#commitlist >= 100) {
5212                 }
5213
5214                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5215                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5216                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5217         }
5218
5219         if ($searchtype eq 'pickaxe') {
5220                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5221                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5222
5223                 print "<table cellspacing=\"0\">\n";
5224                 my $alternate = 1;
5225                 $/ = "\n";
5226                 my $git_command = git_cmd_str();
5227                 my $searchqtext = $searchtext;
5228                 $searchqtext =~ s/'/'\\''/;
5229                 open my $fd, "-|", "$git_command rev-list $hash | " .
5230                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5231                 undef %co;
5232                 my @files;
5233                 while (my $line = <$fd>) {
5234                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5235                                 my %set;
5236                                 $set{'file'} = $6;
5237                                 $set{'from_id'} = $3;
5238                                 $set{'to_id'} = $4;
5239                                 $set{'id'} = $set{'to_id'};
5240                                 if ($set{'id'} =~ m/0{40}/) {
5241                                         $set{'id'} = $set{'from_id'};
5242                                 }
5243                                 if ($set{'id'} =~ m/0{40}/) {
5244                                         next;
5245                                 }
5246                                 push @files, \%set;
5247                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5248                                 if (%co) {
5249                                         if ($alternate) {
5250                                                 print "<tr class=\"dark\">\n";
5251                                         } else {
5252                                                 print "<tr class=\"light\">\n";
5253                                         }
5254                                         $alternate ^= 1;
5255                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5256                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5257                                               "<td><i>" . $author . "</i></td>\n" .
5258                                               "<td>" .
5259                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5260                                                       -class => "list subject"},
5261                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5262                                         while (my $setref = shift @files) {
5263                                                 my %set = %$setref;
5264                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5265                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5266                                                               -class => "list"},
5267                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5268                                                       "<br/>\n";
5269                                         }
5270                                         print "</td>\n" .
5271                                               "<td class=\"link\">" .
5272                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5273                                               " | " .
5274                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5275                                         print "</td>\n" .
5276                                               "</tr>\n";
5277                                 }
5278                                 %co = parse_commit($1);
5279                         }
5280                 }
5281                 close $fd;
5282
5283                 print "</table>\n";
5284         }
5285
5286         if ($searchtype eq 'grep') {
5287                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5288                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5289
5290                 print "<table cellspacing=\"0\">\n";
5291                 my $alternate = 1;
5292                 my $matches = 0;
5293                 $/ = "\n";
5294                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5295                 my $lastfile = '';
5296                 while (my $line = <$fd>) {
5297                         chomp $line;
5298                         my ($file, $lno, $ltext, $binary);
5299                         last if ($matches++ > 1000);
5300                         if ($line =~ /^Binary file (.+) matches$/) {
5301                                 $file = $1;
5302                                 $binary = 1;
5303                         } else {
5304                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5305                         }
5306                         if ($file ne $lastfile) {
5307                                 $lastfile and print "</td></tr>\n";
5308                                 if ($alternate++) {
5309                                         print "<tr class=\"dark\">\n";
5310                                 } else {
5311                                         print "<tr class=\"light\">\n";
5312                                 }
5313                                 print "<td class=\"list\">".
5314                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5315                                                                file_name=>"$file"),
5316                                                 -class => "list"}, esc_path($file));
5317                                 print "</td><td>\n";
5318                                 $lastfile = $file;
5319                         }
5320                         if ($binary) {
5321                                 print "<div class=\"binary\">Binary file</div>\n";
5322                         } else {
5323                                 $ltext = untabify($ltext);
5324                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5325                                         $ltext = esc_html($1, -nbsp=>1);
5326                                         $ltext .= '<span class="match">';
5327                                         $ltext .= esc_html($2, -nbsp=>1);
5328                                         $ltext .= '</span>';
5329                                         $ltext .= esc_html($3, -nbsp=>1);
5330                                 } else {
5331                                         $ltext = esc_html($ltext, -nbsp=>1);
5332                                 }
5333                                 print "<div class=\"pre\">" .
5334                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5335                                                                file_name=>"$file").'#l'.$lno,
5336                                                 -class => "linenr"}, sprintf('%4i', $lno))
5337                                         . ' ' .  $ltext . "</div>\n";
5338                         }
5339                 }
5340                 if ($lastfile) {
5341                         print "</td></tr>\n";
5342                         if ($matches > 1000) {
5343                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5344                         }
5345                 } else {
5346                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5347                 }
5348                 close $fd;
5349
5350                 print "</table>\n";
5351         }
5352         git_footer_html();
5353 }
5354
5355 sub git_search_help {
5356         git_header_html();
5357         git_print_page_nav('','', $hash,$hash,$hash);
5358         print <<EOT;
5359 <dl>
5360 <dt><b>commit</b></dt>
5361 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5362 EOT
5363         my ($have_grep) = gitweb_check_feature('grep');
5364         if ($have_grep) {
5365                 print <<EOT;
5366 <dt><b>grep</b></dt>
5367 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5368     a different one) are searched for the given
5369 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5370 (POSIX extended) and the matches are listed. On large
5371 trees, this search can take a while and put some strain on the server, so please use it with
5372 some consideration.</dd>
5373 EOT
5374         }
5375         print <<EOT;
5376 <dt><b>author</b></dt>
5377 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5378 <dt><b>committer</b></dt>
5379 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5380 EOT
5381         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5382         if ($have_pickaxe) {
5383                 print <<EOT;
5384 <dt><b>pickaxe</b></dt>
5385 <dd>All commits that caused the string to appear or disappear from any file (changes that
5386 added, removed or "modified" the string) will be listed. This search can take a while and
5387 takes a lot of strain on the server, so please use it wisely.</dd>
5388 EOT
5389         }
5390         print "</dl>\n";
5391         git_footer_html();
5392 }
5393
5394 sub git_shortlog {
5395         my $head = git_get_head_hash($project);
5396         if (!defined $hash) {
5397                 $hash = $head;
5398         }
5399         if (!defined $page) {
5400                 $page = 0;
5401         }
5402         my $refs = git_get_references();
5403
5404         my @commitlist = parse_commits($hash, 101, (100 * $page));
5405
5406         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5407         my $next_link = '';
5408         if ($#commitlist >= 100) {
5409                 $next_link =
5410                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5411                                  -accesskey => "n", -title => "Alt-n"}, "next");
5412         }
5413
5414         git_header_html();
5415         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5416         git_print_header_div('summary', $project);
5417
5418         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5419
5420         git_footer_html();
5421 }
5422
5423 ## ......................................................................
5424 ## feeds (RSS, Atom; OPML)
5425
5426 sub git_feed {
5427         my $format = shift || 'atom';
5428         my ($have_blame) = gitweb_check_feature('blame');
5429
5430         # Atom: http://www.atomenabled.org/developers/syndication/
5431         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5432         if ($format ne 'rss' && $format ne 'atom') {
5433                 die_error(undef, "Unknown web feed format");
5434         }
5435
5436         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5437         my $head = $hash || 'HEAD';
5438         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5439
5440         my %latest_commit;
5441         my %latest_date;
5442         my $content_type = "application/$format+xml";
5443         if (defined $cgi->http('HTTP_ACCEPT') &&
5444                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5445                 # browser (feed reader) prefers text/xml
5446                 $content_type = 'text/xml';
5447         }
5448         if (defined($commitlist[0])) {
5449                 %latest_commit = %{$commitlist[0]};
5450                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5451                 print $cgi->header(
5452                         -type => $content_type,
5453                         -charset => 'utf-8',
5454                         -last_modified => $latest_date{'rfc2822'});
5455         } else {
5456                 print $cgi->header(
5457                         -type => $content_type,
5458                         -charset => 'utf-8');
5459         }
5460
5461         # Optimization: skip generating the body if client asks only
5462         # for Last-Modified date.
5463         return if ($cgi->request_method() eq 'HEAD');
5464
5465         # header variables
5466         my $title = "$site_name - $project/$action";
5467         my $feed_type = 'log';
5468         if (defined $hash) {
5469                 $title .= " - '$hash'";
5470                 $feed_type = 'branch log';
5471                 if (defined $file_name) {
5472                         $title .= " :: $file_name";
5473                         $feed_type = 'history';
5474                 }
5475         } elsif (defined $file_name) {
5476                 $title .= " - $file_name";
5477                 $feed_type = 'history';
5478         }
5479         $title .= " $feed_type";
5480         my $descr = git_get_project_description($project);
5481         if (defined $descr) {
5482                 $descr = esc_html($descr);
5483         } else {
5484                 $descr = "$project " .
5485                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5486                          " feed";
5487         }
5488         my $owner = git_get_project_owner($project);
5489         $owner = esc_html($owner);
5490
5491         #header
5492         my $alt_url;
5493         if (defined $file_name) {
5494                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5495         } elsif (defined $hash) {
5496                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5497         } else {
5498                 $alt_url = href(-full=>1, action=>"summary");
5499         }
5500         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5501         if ($format eq 'rss') {
5502                 print <<XML;
5503 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5504 <channel>
5505 XML
5506                 print "<title>$title</title>\n" .
5507                       "<link>$alt_url</link>\n" .
5508                       "<description>$descr</description>\n" .
5509                       "<language>en</language>\n";
5510         } elsif ($format eq 'atom') {
5511                 print <<XML;
5512 <feed xmlns="http://www.w3.org/2005/Atom">
5513 XML
5514                 print "<title>$title</title>\n" .
5515                       "<subtitle>$descr</subtitle>\n" .
5516                       '<link rel="alternate" type="text/html" href="' .
5517                       $alt_url . '" />' . "\n" .
5518                       '<link rel="self" type="' . $content_type . '" href="' .
5519                       $cgi->self_url() . '" />' . "\n" .
5520                       "<id>" . href(-full=>1) . "</id>\n" .
5521                       # use project owner for feed author
5522                       "<author><name>$owner</name></author>\n";
5523                 if (defined $favicon) {
5524                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5525                 }
5526                 if (defined $logo_url) {
5527                         # not twice as wide as tall: 72 x 27 pixels
5528                         print "<logo>" . esc_url($logo) . "</logo>\n";
5529                 }
5530                 if (! %latest_date) {
5531                         # dummy date to keep the feed valid until commits trickle in:
5532                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5533                 } else {
5534                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5535                 }
5536         }
5537
5538         # contents
5539         for (my $i = 0; $i <= $#commitlist; $i++) {
5540                 my %co = %{$commitlist[$i]};
5541                 my $commit = $co{'id'};
5542                 # we read 150, we always show 30 and the ones more recent than 48 hours
5543                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5544                         last;
5545                 }
5546                 my %cd = parse_date($co{'author_epoch'});
5547
5548                 # get list of changed files
5549                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5550                         $co{'parent'} || "--root",
5551                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5552                         or next;
5553                 my @difftree = map { chomp; $_ } <$fd>;
5554                 close $fd
5555                         or next;
5556
5557                 # print element (entry, item)
5558                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5559                 if ($format eq 'rss') {
5560                         print "<item>\n" .
5561                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5562                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5563                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5564                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5565                               "<link>$co_url</link>\n" .
5566                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5567                               "<content:encoded>" .
5568                               "<![CDATA[\n";
5569                 } elsif ($format eq 'atom') {
5570                         print "<entry>\n" .
5571                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5572                               "<updated>$cd{'iso-8601'}</updated>\n" .
5573                               "<author>\n" .
5574                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5575                         if ($co{'author_email'}) {
5576                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5577                         }
5578                         print "</author>\n" .
5579                               # use committer for contributor
5580                               "<contributor>\n" .
5581                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5582                         if ($co{'committer_email'}) {
5583                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5584                         }
5585                         print "</contributor>\n" .
5586                               "<published>$cd{'iso-8601'}</published>\n" .
5587                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5588                               "<id>$co_url</id>\n" .
5589                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5590                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5591                 }
5592                 my $comment = $co{'comment'};
5593                 print "<pre>\n";
5594                 foreach my $line (@$comment) {
5595                         $line = esc_html($line);
5596                         print "$line\n";
5597                 }
5598                 print "</pre><ul>\n";
5599                 foreach my $difftree_line (@difftree) {
5600                         my %difftree = parse_difftree_raw_line($difftree_line);
5601                         next if !$difftree{'from_id'};
5602
5603                         my $file = $difftree{'file'} || $difftree{'to_file'};
5604
5605                         print "<li>" .
5606                               "[" .
5607                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5608                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5609                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5610                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5611                                       -title => "diff"}, 'D');
5612                         if ($have_blame) {
5613                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5614                                                              file_name=>$file, hash_base=>$commit),
5615                                               -title => "blame"}, 'B');
5616                         }
5617                         # if this is not a feed of a file history
5618                         if (!defined $file_name || $file_name ne $file) {
5619                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5620                                                              file_name=>$file, hash=>$commit),
5621                                               -title => "history"}, 'H');
5622                         }
5623                         $file = esc_path($file);
5624                         print "] ".
5625                               "$file</li>\n";
5626                 }
5627                 if ($format eq 'rss') {
5628                         print "</ul>]]>\n" .
5629                               "</content:encoded>\n" .
5630                               "</item>\n";
5631                 } elsif ($format eq 'atom') {
5632                         print "</ul>\n</div>\n" .
5633                               "</content>\n" .
5634                               "</entry>\n";
5635                 }
5636         }
5637
5638         # end of feed
5639         if ($format eq 'rss') {
5640                 print "</channel>\n</rss>\n";
5641         }       elsif ($format eq 'atom') {
5642                 print "</feed>\n";
5643         }
5644 }
5645
5646 sub git_rss {
5647         git_feed('rss');
5648 }
5649
5650 sub git_atom {
5651         git_feed('atom');
5652 }
5653
5654 sub git_opml {
5655         my @list = git_get_projects_list();
5656
5657         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5658         print <<XML;
5659 <?xml version="1.0" encoding="utf-8"?>
5660 <opml version="1.0">
5661 <head>
5662   <title>$site_name OPML Export</title>
5663 </head>
5664 <body>
5665 <outline text="git RSS feeds">
5666 XML
5667
5668         foreach my $pr (@list) {
5669                 my %proj = %$pr;
5670                 my $head = git_get_head_hash($proj{'path'});
5671                 if (!defined $head) {
5672                         next;
5673                 }
5674                 $git_dir = "$projectroot/$proj{'path'}";
5675                 my %co = parse_commit($head);
5676                 if (!%co) {
5677                         next;
5678                 }
5679
5680                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5681                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5682                 my $html = "$my_url?p=$proj{'path'};a=summary";
5683                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5684         }
5685         print <<XML;
5686 </outline>
5687 </body>
5688 </opml>
5689 XML
5690 }