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