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         $params{'project'} = $project unless exists $params{'project'};
 615
 616         if ($params{-replay}) {
 617                 while (my ($name, $symbol) = each %mapping) {
 618                         if (!exists $params{$name}) {
 619                                 # to allow for multivalued params we use arrayref form
 620                                 $params{$name} = [ $cgi->param($symbol) ];
 621                         }
 622                 }
 623         }
 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         $git_dir = "$projectroot/$project";
1774
1775         if (!defined $gitweb_project_owner) {
1776                 git_get_project_list_from_file();
1777         }
1778
1779         if (exists $gitweb_project_owner->{$project}) {
1780                 $owner = $gitweb_project_owner->{$project};
1781         }
1782         if (!defined $owner){
1783                 $owner = git_get_project_config('owner');
1784         }
1785         if (!defined $owner) {
1786                 $owner = get_file_owner("$git_dir");
1787         }
1788
1789         return $owner;
1790 }
1791
1792 sub git_get_last_activity {
1793         my ($path) = @_;
1794         my $fd;
1795
1796         $git_dir = "$projectroot/$path";
1797         open($fd, "-|", git_cmd(), 'for-each-ref',
1798              '--format=%(committer)',
1799              '--sort=-committerdate',
1800              '--count=1',
1801              'refs/heads') or return;
1802         my $most_recent = <$fd>;
1803         close $fd or return;
1804         if (defined $most_recent &&
1805             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1806                 my $timestamp = $1;
1807                 my $age = time - $timestamp;
1808                 return ($age, age_string($age));
1809         }
1810         return (undef, undef);
1811 }
1812
1813 sub git_get_references {
1814         my $type = shift || "";
1815         my %refs;
1816         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1817         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1818         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1819                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1820                 or return;
1821
1822         while (my $line = <$fd>) {
1823                 chomp $line;
1824                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1825                         if (defined $refs{$1}) {
1826                                 push @{$refs{$1}}, $2;
1827                         } else {
1828                                 $refs{$1} = [ $2 ];
1829                         }
1830                 }
1831         }
1832         close $fd or return;
1833         return \%refs;
1834 }
1835
1836 sub git_get_rev_name_tags {
1837         my $hash = shift || return undef;
1838
1839         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1840                 or return;
1841         my $name_rev = <$fd>;
1842         close $fd;
1843
1844         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1845                 return $1;
1846         } else {
1847                 # catches also '$hash undefined' output
1848                 return undef;
1849         }
1850 }
1851
1852 ## ----------------------------------------------------------------------
1853 ## parse to hash functions
1854
1855 sub parse_date {
1856         my $epoch = shift;
1857         my $tz = shift || "-0000";
1858
1859         my %date;
1860         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1861         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1862         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1863         $date{'hour'} = $hour;
1864         $date{'minute'} = $min;
1865         $date{'mday'} = $mday;
1866         $date{'day'} = $days[$wday];
1867         $date{'month'} = $months[$mon];
1868         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1869                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1870         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1871                              $mday, $months[$mon], $hour ,$min;
1872         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1873                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1874
1875         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1876         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1877         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1878         $date{'hour_local'} = $hour;
1879         $date{'minute_local'} = $min;
1880         $date{'tz_local'} = $tz;
1881         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1882                                   1900+$year, $mon+1, $mday,
1883                                   $hour, $min, $sec, $tz);
1884         return %date;
1885 }
1886
1887 sub parse_tag {
1888         my $tag_id = shift;
1889         my %tag;
1890         my @comment;
1891
1892         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1893         $tag{'id'} = $tag_id;
1894         while (my $line = <$fd>) {
1895                 chomp $line;
1896                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1897                         $tag{'object'} = $1;
1898                 } elsif ($line =~ m/^type (.+)$/) {
1899                         $tag{'type'} = $1;
1900                 } elsif ($line =~ m/^tag (.+)$/) {
1901                         $tag{'name'} = $1;
1902                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1903                         $tag{'author'} = $1;
1904                         $tag{'epoch'} = $2;
1905                         $tag{'tz'} = $3;
1906                 } elsif ($line =~ m/--BEGIN/) {
1907                         push @comment, $line;
1908                         last;
1909                 } elsif ($line eq "") {
1910                         last;
1911                 }
1912         }
1913         push @comment, <$fd>;
1914         $tag{'comment'} = \@comment;
1915         close $fd or return;
1916         if (!defined $tag{'name'}) {
1917                 return
1918         };
1919         return %tag
1920 }
1921
1922 sub parse_commit_text {
1923         my ($commit_text, $withparents) = @_;
1924         my @commit_lines = split '\n', $commit_text;
1925         my %co;
1926
1927         pop @commit_lines; # Remove '\0'
1928
1929         if (! @commit_lines) {
1930                 return;
1931         }
1932
1933         my $header = shift @commit_lines;
1934         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1935                 return;
1936         }
1937         ($co{'id'}, my @parents) = split ' ', $header;
1938         while (my $line = shift @commit_lines) {
1939                 last if $line eq "\n";
1940                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1941                         $co{'tree'} = $1;
1942                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1943                         push @parents, $1;
1944                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1945                         $co{'author'} = $1;
1946                         $co{'author_epoch'} = $2;
1947                         $co{'author_tz'} = $3;
1948                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1949                                 $co{'author_name'}  = $1;
1950                                 $co{'author_email'} = $2;
1951                         } else {
1952                                 $co{'author_name'} = $co{'author'};
1953                         }
1954                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1955                         $co{'committer'} = $1;
1956                         $co{'committer_epoch'} = $2;
1957                         $co{'committer_tz'} = $3;
1958                         $co{'committer_name'} = $co{'committer'};
1959                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1960                                 $co{'committer_name'}  = $1;
1961                                 $co{'committer_email'} = $2;
1962                         } else {
1963                                 $co{'committer_name'} = $co{'committer'};
1964                         }
1965                 }
1966         }
1967         if (!defined $co{'tree'}) {
1968                 return;
1969         };
1970         $co{'parents'} = \@parents;
1971         $co{'parent'} = $parents[0];
1972
1973         foreach my $title (@commit_lines) {
1974                 $title =~ s/^    //;
1975                 if ($title ne "") {
1976                         $co{'title'} = chop_str($title, 80, 5);
1977                         # remove leading stuff of merges to make the interesting part visible
1978                         if (length($title) > 50) {
1979                                 $title =~ s/^Automatic //;
1980                                 $title =~ s/^merge (of|with) /Merge ... /i;
1981                                 if (length($title) > 50) {
1982                                         $title =~ s/(http|rsync):\/\///;
1983                                 }
1984                                 if (length($title) > 50) {
1985                                         $title =~ s/(master|www|rsync)\.//;
1986                                 }
1987                                 if (length($title) > 50) {
1988                                         $title =~ s/kernel.org:?//;
1989                                 }
1990                                 if (length($title) > 50) {
1991                                         $title =~ s/\/pub\/scm//;
1992                                 }
1993                         }
1994                         $co{'title_short'} = chop_str($title, 50, 5);
1995                         last;
1996                 }
1997         }
1998         if ($co{'title'} eq "") {
1999                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2000         }
2001         # remove added spaces
2002         foreach my $line (@commit_lines) {
2003                 $line =~ s/^    //;
2004         }
2005         $co{'comment'} = \@commit_lines;
2006
2007         my $age = time - $co{'committer_epoch'};
2008         $co{'age'} = $age;
2009         $co{'age_string'} = age_string($age);
2010         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2011         if ($age > 60*60*24*7*2) {
2012                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2013                 $co{'age_string_age'} = $co{'age_string'};
2014         } else {
2015                 $co{'age_string_date'} = $co{'age_string'};
2016                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2017         }
2018         return %co;
2019 }
2020
2021 sub parse_commit {
2022         my ($commit_id) = @_;
2023         my %co;
2024
2025         local $/ = "\0";
2026
2027         open my $fd, "-|", git_cmd(), "rev-list",
2028                 "--parents",
2029                 "--header",
2030                 "--max-count=1",
2031                 $commit_id,
2032                 "--",
2033                 or die_error(undef, "Open git-rev-list failed");
2034         %co = parse_commit_text(<$fd>, 1);
2035         close $fd;
2036
2037         return %co;
2038 }
2039
2040 sub parse_commits {
2041         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2042         my @cos;
2043
2044         $maxcount ||= 1;
2045         $skip ||= 0;
2046
2047         local $/ = "\0";
2048
2049         open my $fd, "-|", git_cmd(), "rev-list",
2050                 "--header",
2051                 ($arg ? ($arg) : ()),
2052                 ("--max-count=" . $maxcount),
2053                 ("--skip=" . $skip),
2054                 @extra_options,
2055                 $commit_id,
2056                 "--",
2057                 ($filename ? ($filename) : ())
2058                 or die_error(undef, "Open git-rev-list failed");
2059         while (my $line = <$fd>) {
2060                 my %co = parse_commit_text($line);
2061                 push @cos, \%co;
2062         }
2063         close $fd;
2064
2065         return wantarray ? @cos : \@cos;
2066 }
2067
2068 # parse ref from ref_file, given by ref_id, with given type
2069 sub parse_ref {
2070         my $ref_file = shift;
2071         my $ref_id = shift;
2072         my $type = shift || git_get_type($ref_id);
2073         my %ref_item;
2074
2075         $ref_item{'type'} = $type;
2076         $ref_item{'id'} = $ref_id;
2077         $ref_item{'epoch'} = 0;
2078         $ref_item{'age'} = "unknown";
2079         if ($type eq "tag") {
2080                 my %tag = parse_tag($ref_id);
2081                 $ref_item{'comment'} = $tag{'comment'};
2082                 if ($tag{'type'} eq "commit") {
2083                         my %co = parse_commit($tag{'object'});
2084                         $ref_item{'epoch'} = $co{'committer_epoch'};
2085                         $ref_item{'age'} = $co{'age_string'};
2086                 } elsif (defined($tag{'epoch'})) {
2087                         my $age = time - $tag{'epoch'};
2088                         $ref_item{'epoch'} = $tag{'epoch'};
2089                         $ref_item{'age'} = age_string($age);
2090                 }
2091                 $ref_item{'reftype'} = $tag{'type'};
2092                 $ref_item{'name'} = $tag{'name'};
2093                 $ref_item{'refid'} = $tag{'object'};
2094         } elsif ($type eq "commit"){
2095                 my %co = parse_commit($ref_id);
2096                 $ref_item{'reftype'} = "commit";
2097                 $ref_item{'name'} = $ref_file;
2098                 $ref_item{'title'} = $co{'title'};
2099                 $ref_item{'refid'} = $ref_id;
2100                 $ref_item{'epoch'} = $co{'committer_epoch'};
2101                 $ref_item{'age'} = $co{'age_string'};
2102         } else {
2103                 $ref_item{'reftype'} = $type;
2104                 $ref_item{'name'} = $ref_file;
2105                 $ref_item{'refid'} = $ref_id;
2106         }
2107
2108         return %ref_item;
2109 }
2110
2111 # parse line of git-diff-tree "raw" output
2112 sub parse_difftree_raw_line {
2113         my $line = shift;
2114         my %res;
2115
2116         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2117         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2118         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2119                 $res{'from_mode'} = $1;
2120                 $res{'to_mode'} = $2;
2121                 $res{'from_id'} = $3;
2122                 $res{'to_id'} = $4;
2123                 $res{'status'} = $res{'status_str'} = $5;
2124                 $res{'similarity'} = $6;
2125                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2126                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2127                 } else {
2128                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2129                 }
2130         }
2131         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2132         # combined diff (for merge commit)
2133         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2134                 $res{'nparents'}  = length($1);
2135                 $res{'from_mode'} = [ split(' ', $2) ];
2136                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2137                 $res{'from_id'} = [ split(' ', $3) ];
2138                 $res{'to_id'} = pop @{$res{'from_id'}};
2139                 $res{'status_str'} = $4;
2140                 $res{'status'} = [ split('', $4) ];
2141                 $res{'to_file'} = unquote($5);
2142         }
2143         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2144         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2145                 $res{'commit'} = $1;
2146         }
2147
2148         return wantarray ? %res : \%res;
2149 }
2150
2151 # wrapper: return parsed line of git-diff-tree "raw" output
2152 # (the argument might be raw line, or parsed info)
2153 sub parsed_difftree_line {
2154         my $line_or_ref = shift;
2155
2156         if (ref($line_or_ref) eq "HASH") {
2157                 # pre-parsed (or generated by hand)
2158                 return $line_or_ref;
2159         } else {
2160                 return parse_difftree_raw_line($line_or_ref);
2161         }
2162 }
2163
2164 # parse line of git-ls-tree output
2165 sub parse_ls_tree_line ($;%) {
2166         my $line = shift;
2167         my %opts = @_;
2168         my %res;
2169
2170         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2171         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2172
2173         $res{'mode'} = $1;
2174         $res{'type'} = $2;
2175         $res{'hash'} = $3;
2176         if ($opts{'-z'}) {
2177                 $res{'name'} = $4;
2178         } else {
2179                 $res{'name'} = unquote($4);
2180         }
2181
2182         return wantarray ? %res : \%res;
2183 }
2184
2185 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2186 sub parse_from_to_diffinfo {
2187         my ($diffinfo, $from, $to, @parents) = @_;
2188
2189         if ($diffinfo->{'nparents'}) {
2190                 # combined diff
2191                 $from->{'file'} = [];
2192                 $from->{'href'} = [];
2193                 fill_from_file_info($diffinfo, @parents)
2194                         unless exists $diffinfo->{'from_file'};
2195                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2196                         $from->{'file'}[$i] =
2197                                 defined $diffinfo->{'from_file'}[$i] ?
2198                                         $diffinfo->{'from_file'}[$i] :
2199                                         $diffinfo->{'to_file'};
2200                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2201                                 $from->{'href'}[$i] = href(action=>"blob",
2202                                                            hash_base=>$parents[$i],
2203                                                            hash=>$diffinfo->{'from_id'}[$i],
2204                                                            file_name=>$from->{'file'}[$i]);
2205                         } else {
2206                                 $from->{'href'}[$i] = undef;
2207                         }
2208                 }
2209         } else {
2210                 # ordinary (not combined) diff
2211                 $from->{'file'} = $diffinfo->{'from_file'};
2212                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2213                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2214                                                hash=>$diffinfo->{'from_id'},
2215                                                file_name=>$from->{'file'});
2216                 } else {
2217                         delete $from->{'href'};
2218                 }
2219         }
2220
2221         $to->{'file'} = $diffinfo->{'to_file'};
2222         if (!is_deleted($diffinfo)) { # file exists in result
2223                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2224                                      hash=>$diffinfo->{'to_id'},
2225                                      file_name=>$to->{'file'});
2226         } else {
2227                 delete $to->{'href'};
2228         }
2229 }
2230
2231 ## ......................................................................
2232 ## parse to array of hashes functions
2233
2234 sub git_get_heads_list {
2235         my $limit = shift;
2236         my @headslist;
2237
2238         open my $fd, '-|', git_cmd(), 'for-each-ref',
2239                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2240                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2241                 'refs/heads'
2242                 or return;
2243         while (my $line = <$fd>) {
2244                 my %ref_item;
2245
2246                 chomp $line;
2247                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2248                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2249                 my ($committer, $epoch, $tz) =
2250                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2251                 $ref_item{'fullname'}  = $name;
2252                 $name =~ s!^refs/heads/!!;
2253
2254                 $ref_item{'name'}  = $name;
2255                 $ref_item{'id'}    = $hash;
2256                 $ref_item{'title'} = $title || '(no commit message)';
2257                 $ref_item{'epoch'} = $epoch;
2258                 if ($epoch) {
2259                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2260                 } else {
2261                         $ref_item{'age'} = "unknown";
2262                 }
2263
2264                 push @headslist, \%ref_item;
2265         }
2266         close $fd;
2267
2268         return wantarray ? @headslist : \@headslist;
2269 }
2270
2271 sub git_get_tags_list {
2272         my $limit = shift;
2273         my @tagslist;
2274
2275         open my $fd, '-|', git_cmd(), 'for-each-ref',
2276                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2277                 '--format=%(objectname) %(objecttype) %(refname) '.
2278                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2279                 'refs/tags'
2280                 or return;
2281         while (my $line = <$fd>) {
2282                 my %ref_item;
2283
2284                 chomp $line;
2285                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2286                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2287                 my ($creator, $epoch, $tz) =
2288                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2289                 $ref_item{'fullname'} = $name;
2290                 $name =~ s!^refs/tags/!!;
2291
2292                 $ref_item{'type'} = $type;
2293                 $ref_item{'id'} = $id;
2294                 $ref_item{'name'} = $name;
2295                 if ($type eq "tag") {
2296                         $ref_item{'subject'} = $title;
2297                         $ref_item{'reftype'} = $reftype;
2298                         $ref_item{'refid'}   = $refid;
2299                 } else {
2300                         $ref_item{'reftype'} = $type;
2301                         $ref_item{'refid'}   = $id;
2302                 }
2303
2304                 if ($type eq "tag" || $type eq "commit") {
2305                         $ref_item{'epoch'} = $epoch;
2306                         if ($epoch) {
2307                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2308                         } else {
2309                                 $ref_item{'age'} = "unknown";
2310                         }
2311                 }
2312
2313                 push @tagslist, \%ref_item;
2314         }
2315         close $fd;
2316
2317         return wantarray ? @tagslist : \@tagslist;
2318 }
2319
2320 ## ----------------------------------------------------------------------
2321 ## filesystem-related functions
2322
2323 sub get_file_owner {
2324         my $path = shift;
2325
2326         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2327         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2328         if (!defined $gcos) {
2329                 return undef;
2330         }
2331         my $owner = $gcos;
2332         $owner =~ s/[,;].*$//;
2333         return to_utf8($owner);
2334 }
2335
2336 ## ......................................................................
2337 ## mimetype related functions
2338
2339 sub mimetype_guess_file {
2340         my $filename = shift;
2341         my $mimemap = shift;
2342         -r $mimemap or return undef;
2343
2344         my %mimemap;
2345         open(MIME, $mimemap) or return undef;
2346         while (<MIME>) {
2347                 next if m/^#/; # skip comments
2348                 my ($mime, $exts) = split(/\t+/);
2349                 if (defined $exts) {
2350                         my @exts = split(/\s+/, $exts);
2351                         foreach my $ext (@exts) {
2352                                 $mimemap{$ext} = $mime;
2353                         }
2354                 }
2355         }
2356         close(MIME);
2357
2358         $filename =~ /\.([^.]*)$/;
2359         return $mimemap{$1};
2360 }
2361
2362 sub mimetype_guess {
2363         my $filename = shift;
2364         my $mime;
2365         $filename =~ /\./ or return undef;
2366
2367         if ($mimetypes_file) {
2368                 my $file = $mimetypes_file;
2369                 if ($file !~ m!^/!) { # if it is relative path
2370                         # it is relative to project
2371                         $file = "$projectroot/$project/$file";
2372                 }
2373                 $mime = mimetype_guess_file($filename, $file);
2374         }
2375         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2376         return $mime;
2377 }
2378
2379 sub blob_mimetype {
2380         my $fd = shift;
2381         my $filename = shift;
2382
2383         if ($filename) {
2384                 my $mime = mimetype_guess($filename);
2385                 $mime and return $mime;
2386         }
2387
2388         # just in case
2389         return $default_blob_plain_mimetype unless $fd;
2390
2391         if (-T $fd) {
2392                 return 'text/plain' .
2393                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2394         } elsif (! $filename) {
2395                 return 'application/octet-stream';
2396         } elsif ($filename =~ m/\.png$/i) {
2397                 return 'image/png';
2398         } elsif ($filename =~ m/\.gif$/i) {
2399                 return 'image/gif';
2400         } elsif ($filename =~ m/\.jpe?g$/i) {
2401                 return 'image/jpeg';
2402         } else {
2403                 return 'application/octet-stream';
2404         }
2405 }
2406
2407 ## ======================================================================
2408 ## functions printing HTML: header, footer, error page
2409
2410 sub git_header_html {
2411         my $status = shift || "200 OK";
2412         my $expires = shift;
2413
2414         my $title = "$site_name";
2415         if (defined $project) {
2416                 $title .= " - " . to_utf8($project);
2417                 if (defined $action) {
2418                         $title .= "/$action";
2419                         if (defined $file_name) {
2420                                 $title .= " - " . esc_path($file_name);
2421                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2422                                         $title .= "/";
2423                                 }
2424                         }
2425                 }
2426         }
2427         my $content_type;
2428         # require explicit support from the UA if we are to send the page as
2429         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2430         # we have to do this because MSIE sometimes globs '*/*', pretending to
2431         # support xhtml+xml but choking when it gets what it asked for.
2432         if (defined $cgi->http('HTTP_ACCEPT') &&
2433             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2434             $cgi->Accept('application/xhtml+xml') != 0) {
2435                 $content_type = 'application/xhtml+xml';
2436         } else {
2437                 $content_type = 'text/html';
2438         }
2439         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2440                            -status=> $status, -expires => $expires);
2441         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2442         print <<EOF;
2443 <?xml version="1.0" encoding="utf-8"?>
2444 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2445 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2446 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2447 <!-- git core binaries version $git_version -->
2448 <head>
2449 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2450 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2451 <meta name="robots" content="index, nofollow"/>
2452 <title>$title</title>
2453 EOF
2454 # print out each stylesheet that exist
2455         if (defined $stylesheet) {
2456 #provides backwards capability for those people who define style sheet in a config file
2457                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2458         } else {
2459                 foreach my $stylesheet (@stylesheets) {
2460                         next unless $stylesheet;
2461                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2462                 }
2463         }
2464         if (defined $project) {
2465                 printf('<link rel="alternate" title="%s log RSS feed" '.
2466                        'href="%s" type="application/rss+xml" />'."\n",
2467                        esc_param($project), href(action=>"rss"));
2468                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2469                        'href="%s" type="application/rss+xml" />'."\n",
2470                        esc_param($project), href(action=>"rss",
2471                                                  extra_options=>"--no-merges"));
2472                 printf('<link rel="alternate" title="%s log Atom feed" '.
2473                        'href="%s" type="application/atom+xml" />'."\n",
2474                        esc_param($project), href(action=>"atom"));
2475                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2476                        'href="%s" type="application/atom+xml" />'."\n",
2477                        esc_param($project), href(action=>"atom",
2478                                                  extra_options=>"--no-merges"));
2479         } else {
2480                 printf('<link rel="alternate" title="%s projects list" '.
2481                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2482                        $site_name, href(project=>undef, action=>"project_index"));
2483                 printf('<link rel="alternate" title="%s projects feeds" '.
2484                        'href="%s" type="text/x-opml"/>'."\n",
2485                        $site_name, href(project=>undef, action=>"opml"));
2486         }
2487         if (defined $favicon) {
2488                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2489         }
2490
2491         print "</head>\n" .
2492               "<body>\n";
2493
2494         if (-f $site_header) {
2495                 open (my $fd, $site_header);
2496                 print <$fd>;
2497                 close $fd;
2498         }
2499
2500         print "<div class=\"page_header\">\n" .
2501               $cgi->a({-href => esc_url($logo_url),
2502                        -title => $logo_label},
2503                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2504         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2505         if (defined $project) {
2506                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2507                 if (defined $action) {
2508                         print " / $action";
2509                 }
2510                 print "\n";
2511         }
2512         print "</div>\n";
2513
2514         my ($have_search) = gitweb_check_feature('search');
2515         if ((defined $project) && ($have_search)) {
2516                 if (!defined $searchtext) {
2517                         $searchtext = "";
2518                 }
2519                 my $search_hash;
2520                 if (defined $hash_base) {
2521                         $search_hash = $hash_base;
2522                 } elsif (defined $hash) {
2523                         $search_hash = $hash;
2524                 } else {
2525                         $search_hash = "HEAD";
2526                 }
2527                 my $action = $my_uri;
2528                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2529                 if ($use_pathinfo) {
2530                         $action .= "/$project";
2531                 } else {
2532                         $cgi->param("p", $project);
2533                 }
2534                 $cgi->param("a", "search");
2535                 $cgi->param("h", $search_hash);
2536                 print $cgi->startform(-method => "get", -action => $action) .
2537                       "<div class=\"search\">\n" .
2538                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2539                       $cgi->hidden(-name => "a") . "\n" .
2540                       $cgi->hidden(-name => "h") . "\n" .
2541                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2542                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2543                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2544                       " search:\n",
2545                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2546                       "</div>" .
2547                       $cgi->end_form() . "\n";
2548         }
2549 }
2550
2551 sub git_footer_html {
2552         print "<div class=\"page_footer\">\n";
2553         if (defined $project) {
2554                 my $descr = git_get_project_description($project);
2555                 if (defined $descr) {
2556                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2557                 }
2558                 print $cgi->a({-href => href(action=>"rss"),
2559                               -class => "rss_logo"}, "RSS") . " ";
2560                 print $cgi->a({-href => href(action=>"atom"),
2561                               -class => "rss_logo"}, "Atom") . "\n";
2562         } else {
2563                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2564                               -class => "rss_logo"}, "OPML") . " ";
2565                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2566                               -class => "rss_logo"}, "TXT") . "\n";
2567         }
2568         print "</div>\n" ;
2569
2570         if (-f $site_footer) {
2571                 open (my $fd, $site_footer);
2572                 print <$fd>;
2573                 close $fd;
2574         }
2575
2576         print "</body>\n" .
2577               "</html>";
2578 }
2579
2580 sub die_error {
2581         my $status = shift || "403 Forbidden";
2582         my $error = shift || "Malformed query, file missing or permission denied";
2583
2584         git_header_html($status);
2585         print <<EOF;
2586 <div class="page_body">
2587 <br /><br />
2588 $status - $error
2589 <br />
2590 </div>
2591 EOF
2592         git_footer_html();
2593         exit;
2594 }
2595
2596 ## ----------------------------------------------------------------------
2597 ## functions printing or outputting HTML: navigation
2598
2599 sub git_print_page_nav {
2600         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2601         $extra = '' if !defined $extra; # pager or formats
2602
2603         my @navs = qw(summary shortlog log commit commitdiff tree);
2604         if ($suppress) {
2605                 @navs = grep { $_ ne $suppress } @navs;
2606         }
2607
2608         my %arg = map { $_ => {action=>$_} } @navs;
2609         if (defined $head) {
2610                 for (qw(commit commitdiff)) {
2611                         $arg{$_}{'hash'} = $head;
2612                 }
2613                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2614                         for (qw(shortlog log)) {
2615                                 $arg{$_}{'hash'} = $head;
2616                         }
2617                 }
2618         }
2619         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2620         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2621
2622         print "<div class=\"page_nav\">\n" .
2623                 (join " | ",
2624                  map { $_ eq $current ?
2625                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2626                  } @navs);
2627         print "<br/>\n$extra<br/>\n" .
2628               "</div>\n";
2629 }
2630
2631 sub format_paging_nav {
2632         my ($action, $hash, $head, $page, $nrevs) = @_;
2633         my $paging_nav;
2634
2635
2636         if ($hash ne $head || $page) {
2637                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2638         } else {
2639                 $paging_nav .= "HEAD";
2640         }
2641
2642         if ($page > 0) {
2643                 $paging_nav .= " &sdot; " .
2644                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2645                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2646         } else {
2647                 $paging_nav .= " &sdot; prev";
2648         }
2649
2650         if ($nrevs >= (100 * ($page+1)-1)) {
2651                 $paging_nav .= " &sdot; " .
2652                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2653                                  -accesskey => "n", -title => "Alt-n"}, "next");
2654         } else {
2655                 $paging_nav .= " &sdot; next";
2656         }
2657
2658         return $paging_nav;
2659 }
2660
2661 ## ......................................................................
2662 ## functions printing or outputting HTML: div
2663
2664 sub git_print_header_div {
2665         my ($action, $title, $hash, $hash_base) = @_;
2666         my %args = ();
2667
2668         $args{'action'} = $action;
2669         $args{'hash'} = $hash if $hash;
2670         $args{'hash_base'} = $hash_base if $hash_base;
2671
2672         print "<div class=\"header\">\n" .
2673               $cgi->a({-href => href(%args), -class => "title"},
2674               $title ? $title : $action) .
2675               "\n</div>\n";
2676 }
2677
2678 #sub git_print_authorship (\%) {
2679 sub git_print_authorship {
2680         my $co = shift;
2681
2682         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2683         print "<div class=\"author_date\">" .
2684               esc_html($co->{'author_name'}) .
2685               " [$ad{'rfc2822'}";
2686         if ($ad{'hour_local'} < 6) {
2687                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2688                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2689         } else {
2690                 printf(" (%02d:%02d %s)",
2691                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2692         }
2693         print "]</div>\n";
2694 }
2695
2696 sub git_print_page_path {
2697         my $name = shift;
2698         my $type = shift;
2699         my $hb = shift;
2700
2701
2702         print "<div class=\"page_path\">";
2703         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2704                       -title => 'tree root'}, to_utf8("[$project]"));
2705         print " / ";
2706         if (defined $name) {
2707                 my @dirname = split '/', $name;
2708                 my $basename = pop @dirname;
2709                 my $fullname = '';
2710
2711                 foreach my $dir (@dirname) {
2712                         $fullname .= ($fullname ? '/' : '') . $dir;
2713                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2714                                                      hash_base=>$hb),
2715                                       -title => $fullname}, esc_path($dir));
2716                         print " / ";
2717                 }
2718                 if (defined $type && $type eq 'blob') {
2719                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2720                                                      hash_base=>$hb),
2721                                       -title => $name}, esc_path($basename));
2722                 } elsif (defined $type && $type eq 'tree') {
2723                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2724                                                      hash_base=>$hb),
2725                                       -title => $name}, esc_path($basename));
2726                         print " / ";
2727                 } else {
2728                         print esc_path($basename);
2729                 }
2730         }
2731         print "<br/></div>\n";
2732 }
2733
2734 # sub git_print_log (\@;%) {
2735 sub git_print_log ($;%) {
2736         my $log = shift;
2737         my %opts = @_;
2738
2739         if ($opts{'-remove_title'}) {
2740                 # remove title, i.e. first line of log
2741                 shift @$log;
2742         }
2743         # remove leading empty lines
2744         while (defined $log->[0] && $log->[0] eq "") {
2745                 shift @$log;
2746         }
2747
2748         # print log
2749         my $signoff = 0;
2750         my $empty = 0;
2751         foreach my $line (@$log) {
2752                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2753                         $signoff = 1;
2754                         $empty = 0;
2755                         if (! $opts{'-remove_signoff'}) {
2756                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2757                                 next;
2758                         } else {
2759                                 # remove signoff lines
2760                                 next;
2761                         }
2762                 } else {
2763                         $signoff = 0;
2764                 }
2765
2766                 # print only one empty line
2767                 # do not print empty line after signoff
2768                 if ($line eq "") {
2769                         next if ($empty || $signoff);
2770                         $empty = 1;
2771                 } else {
2772                         $empty = 0;
2773                 }
2774
2775                 print format_log_line_html($line) . "<br/>\n";
2776         }
2777
2778         if ($opts{'-final_empty_line'}) {
2779                 # end with single empty line
2780                 print "<br/>\n" unless $empty;
2781         }
2782 }
2783
2784 # return link target (what link points to)
2785 sub git_get_link_target {
2786         my $hash = shift;
2787         my $link_target;
2788
2789         # read link
2790         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2791                 or return;
2792         {
2793                 local $/;
2794                 $link_target = <$fd>;
2795         }
2796         close $fd
2797                 or return;
2798
2799         return $link_target;
2800 }
2801
2802 # given link target, and the directory (basedir) the link is in,
2803 # return target of link relative to top directory (top tree);
2804 # return undef if it is not possible (including absolute links).
2805 sub normalize_link_target {
2806         my ($link_target, $basedir, $hash_base) = @_;
2807
2808         # we can normalize symlink target only if $hash_base is provided
2809         return unless $hash_base;
2810
2811         # absolute symlinks (beginning with '/') cannot be normalized
2812         return if (substr($link_target, 0, 1) eq '/');
2813
2814         # normalize link target to path from top (root) tree (dir)
2815         my $path;
2816         if ($basedir) {
2817                 $path = $basedir . '/' . $link_target;
2818         } else {
2819                 # we are in top (root) tree (dir)
2820                 $path = $link_target;
2821         }
2822
2823         # remove //, /./, and /../
2824         my @path_parts;
2825         foreach my $part (split('/', $path)) {
2826                 # discard '.' and ''
2827                 next if (!$part || $part eq '.');
2828                 # handle '..'
2829                 if ($part eq '..') {
2830                         if (@path_parts) {
2831                                 pop @path_parts;
2832                         } else {
2833                                 # link leads outside repository (outside top dir)
2834                                 return;
2835                         }
2836                 } else {
2837                         push @path_parts, $part;
2838                 }
2839         }
2840         $path = join('/', @path_parts);
2841
2842         return $path;
2843 }
2844
2845 # print tree entry (row of git_tree), but without encompassing <tr> element
2846 sub git_print_tree_entry {
2847         my ($t, $basedir, $hash_base, $have_blame) = @_;
2848
2849         my %base_key = ();
2850         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2851
2852         # The format of a table row is: mode list link.  Where mode is
2853         # the mode of the entry, list is the name of the entry, an href,
2854         # and link is the action links of the entry.
2855
2856         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2857         if ($t->{'type'} eq "blob") {
2858                 print "<td class=\"list\">" .
2859                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2860                                                file_name=>"$basedir$t->{'name'}", %base_key),
2861                                 -class => "list"}, esc_path($t->{'name'}));
2862                 if (S_ISLNK(oct $t->{'mode'})) {
2863                         my $link_target = git_get_link_target($t->{'hash'});
2864                         if ($link_target) {
2865                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2866                                 if (defined $norm_target) {
2867                                         print " -> " .
2868                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2869                                                                      file_name=>$norm_target),
2870                                                        -title => $norm_target}, esc_path($link_target));
2871                                 } else {
2872                                         print " -> " . esc_path($link_target);
2873                                 }
2874                         }
2875                 }
2876                 print "</td>\n";
2877                 print "<td class=\"link\">";
2878                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2879                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2880                               "blob");
2881                 if ($have_blame) {
2882                         print " | " .
2883                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2884                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2885                                       "blame");
2886                 }
2887                 if (defined $hash_base) {
2888                         print " | " .
2889                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2890                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2891                                       "history");
2892                 }
2893                 print " | " .
2894                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2895                                                file_name=>"$basedir$t->{'name'}")},
2896                                 "raw");
2897                 print "</td>\n";
2898
2899         } elsif ($t->{'type'} eq "tree") {
2900                 print "<td class=\"list\">";
2901                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2902                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2903                               esc_path($t->{'name'}));
2904                 print "</td>\n";
2905                 print "<td class=\"link\">";
2906                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2907                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2908                               "tree");
2909                 if (defined $hash_base) {
2910                         print " | " .
2911                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2912                                                      file_name=>"$basedir$t->{'name'}")},
2913                                       "history");
2914                 }
2915                 print "</td>\n";
2916         } else {
2917                 # unknown object: we can only present history for it
2918                 # (this includes 'commit' object, i.e. submodule support)
2919                 print "<td class=\"list\">" .
2920                       esc_path($t->{'name'}) .
2921                       "</td>\n";
2922                 print "<td class=\"link\">";
2923                 if (defined $hash_base) {
2924                         print $cgi->a({-href => href(action=>"history",
2925                                                      hash_base=>$hash_base,
2926                                                      file_name=>"$basedir$t->{'name'}")},
2927                                       "history");
2928                 }
2929                 print "</td>\n";
2930         }
2931 }
2932
2933 ## ......................................................................
2934 ## functions printing large fragments of HTML
2935
2936 # get pre-image filenames for merge (combined) diff
2937 sub fill_from_file_info {
2938         my ($diff, @parents) = @_;
2939
2940         $diff->{'from_file'} = [ ];
2941         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2942         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2943                 if ($diff->{'status'}[$i] eq 'R' ||
2944                     $diff->{'status'}[$i] eq 'C') {
2945                         $diff->{'from_file'}[$i] =
2946                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2947                 }
2948         }
2949
2950         return $diff;
2951 }
2952
2953 # is current raw difftree line of file deletion
2954 sub is_deleted {
2955         my $diffinfo = shift;
2956
2957         return $diffinfo->{'status_str'} =~ /D/;
2958 }
2959
2960 # does patch correspond to [previous] difftree raw line
2961 # $diffinfo  - hashref of parsed raw diff format
2962 # $patchinfo - hashref of parsed patch diff format
2963 #              (the same keys as in $diffinfo)
2964 sub is_patch_split {
2965         my ($diffinfo, $patchinfo) = @_;
2966
2967         return defined $diffinfo && defined $patchinfo
2968                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2969 }
2970
2971
2972 sub git_difftree_body {
2973         my ($difftree, $hash, @parents) = @_;
2974         my ($parent) = $parents[0];
2975         my ($have_blame) = gitweb_check_feature('blame');
2976         print "<div class=\"list_head\">\n";
2977         if ($#{$difftree} > 10) {
2978                 print(($#{$difftree} + 1) . " files changed:\n");
2979         }
2980         print "</div>\n";
2981
2982         print "<table class=\"" .
2983               (@parents > 1 ? "combined " : "") .
2984               "diff_tree\">\n";
2985
2986         # header only for combined diff in 'commitdiff' view
2987         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2988         if ($has_header) {
2989                 # table header
2990                 print "<thead><tr>\n" .
2991                        "<th></th><th></th>\n"; # filename, patchN link
2992                 for (my $i = 0; $i < @parents; $i++) {
2993                         my $par = $parents[$i];
2994                         print "<th>" .
2995                               $cgi->a({-href => href(action=>"commitdiff",
2996                                                      hash=>$hash, hash_parent=>$par),
2997                                        -title => 'commitdiff to parent number ' .
2998                                                   ($i+1) . ': ' . substr($par,0,7)},
2999                                       $i+1) .
3000                               "&nbsp;</th>\n";
3001                 }
3002                 print "</tr></thead>\n<tbody>\n";
3003         }
3004
3005         my $alternate = 1;
3006         my $patchno = 0;
3007         foreach my $line (@{$difftree}) {
3008                 my $diff = parsed_difftree_line($line);
3009
3010                 if ($alternate) {
3011                         print "<tr class=\"dark\">\n";
3012                 } else {
3013                         print "<tr class=\"light\">\n";
3014                 }
3015                 $alternate ^= 1;
3016
3017                 if (exists $diff->{'nparents'}) { # combined diff
3018
3019                         fill_from_file_info($diff, @parents)
3020                                 unless exists $diff->{'from_file'};
3021
3022                         if (!is_deleted($diff)) {
3023                                 # file exists in the result (child) commit
3024                                 print "<td>" .
3025                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3026                                                              file_name=>$diff->{'to_file'},
3027                                                              hash_base=>$hash),
3028                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3029                                       "</td>\n";
3030                         } else {
3031                                 print "<td>" .
3032                                       esc_path($diff->{'to_file'}) .
3033                                       "</td>\n";
3034                         }
3035
3036                         if ($action eq 'commitdiff') {
3037                                 # link to patch
3038                                 $patchno++;
3039                                 print "<td class=\"link\">" .
3040                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3041                                       " | " .
3042                                       "</td>\n";
3043                         }
3044
3045                         my $has_history = 0;
3046                         my $not_deleted = 0;
3047                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3048                                 my $hash_parent = $parents[$i];
3049                                 my $from_hash = $diff->{'from_id'}[$i];
3050                                 my $from_path = $diff->{'from_file'}[$i];
3051                                 my $status = $diff->{'status'}[$i];
3052
3053                                 $has_history ||= ($status ne 'A');
3054                                 $not_deleted ||= ($status ne 'D');
3055
3056                                 if ($status eq 'A') {
3057                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3058                                 } elsif ($status eq 'D') {
3059                                         print "<td class=\"link\">" .
3060                                               $cgi->a({-href => href(action=>"blob",
3061                                                                      hash_base=>$hash,
3062                                                                      hash=>$from_hash,
3063                                                                      file_name=>$from_path)},
3064                                                       "blob" . ($i+1)) .
3065                                               " | </td>\n";
3066                                 } else {
3067                                         if ($diff->{'to_id'} eq $from_hash) {
3068                                                 print "<td class=\"link nochange\">";
3069                                         } else {
3070                                                 print "<td class=\"link\">";
3071                                         }
3072                                         print $cgi->a({-href => href(action=>"blobdiff",
3073                                                                      hash=>$diff->{'to_id'},
3074                                                                      hash_parent=>$from_hash,
3075                                                                      hash_base=>$hash,
3076                                                                      hash_parent_base=>$hash_parent,
3077                                                                      file_name=>$diff->{'to_file'},
3078                                                                      file_parent=>$from_path)},
3079                                                       "diff" . ($i+1)) .
3080                                               " | </td>\n";
3081                                 }
3082                         }
3083
3084                         print "<td class=\"link\">";
3085                         if ($not_deleted) {
3086                                 print $cgi->a({-href => href(action=>"blob",
3087                                                              hash=>$diff->{'to_id'},
3088                                                              file_name=>$diff->{'to_file'},
3089                                                              hash_base=>$hash)},
3090                                               "blob");
3091                                 print " | " if ($has_history);
3092                         }
3093                         if ($has_history) {
3094                                 print $cgi->a({-href => href(action=>"history",
3095                                                              file_name=>$diff->{'to_file'},
3096                                                              hash_base=>$hash)},
3097                                               "history");
3098                         }
3099                         print "</td>\n";
3100
3101                         print "</tr>\n";
3102                         next; # instead of 'else' clause, to avoid extra indent
3103                 }
3104                 # else ordinary diff
3105
3106                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3107                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3108                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3109                         $to_mode_oct = oct $diff->{'to_mode'};
3110                         if (S_ISREG($to_mode_oct)) { # only for regular file
3111                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3112                         }
3113                         $to_file_type = file_type($diff->{'to_mode'});
3114                 }
3115                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3116                         $from_mode_oct = oct $diff->{'from_mode'};
3117                         if (S_ISREG($to_mode_oct)) { # only for regular file
3118                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3119                         }
3120                         $from_file_type = file_type($diff->{'from_mode'});
3121                 }
3122
3123                 if ($diff->{'status'} eq "A") { # created
3124                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3125                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3126                         $mode_chng   .= "]</span>";
3127                         print "<td>";
3128                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3129                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3130                                       -class => "list"}, esc_path($diff->{'file'}));
3131                         print "</td>\n";
3132                         print "<td>$mode_chng</td>\n";
3133                         print "<td class=\"link\">";
3134                         if ($action eq 'commitdiff') {
3135                                 # link to patch
3136                                 $patchno++;
3137                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3138                                 print " | ";
3139                         }
3140                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3141                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3142                                       "blob");
3143                         print "</td>\n";
3144
3145                 } elsif ($diff->{'status'} eq "D") { # deleted
3146                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3147                         print "<td>";
3148                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3149                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3150                                        -class => "list"}, esc_path($diff->{'file'}));
3151                         print "</td>\n";
3152                         print "<td>$mode_chng</td>\n";
3153                         print "<td class=\"link\">";
3154                         if ($action eq 'commitdiff') {
3155                                 # link to patch
3156                                 $patchno++;
3157                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3158                                 print " | ";
3159                         }
3160                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3161                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3162                                       "blob") . " | ";
3163                         if ($have_blame) {
3164                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3165                                                              file_name=>$diff->{'file'})},
3166                                               "blame") . " | ";
3167                         }
3168                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3169                                                      file_name=>$diff->{'file'})},
3170                                       "history");
3171                         print "</td>\n";
3172
3173                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3174                         my $mode_chnge = "";
3175                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3176                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3177                                 if ($from_file_type ne $to_file_type) {
3178                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3179                                 }
3180                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3181                                         if ($from_mode_str && $to_mode_str) {
3182                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3183                                         } elsif ($to_mode_str) {
3184                                                 $mode_chnge .= " mode: $to_mode_str";
3185                                         }
3186                                 }
3187                                 $mode_chnge .= "]</span>\n";
3188                         }
3189                         print "<td>";
3190                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3191                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3192                                       -class => "list"}, esc_path($diff->{'file'}));
3193                         print "</td>\n";
3194                         print "<td>$mode_chnge</td>\n";
3195                         print "<td class=\"link\">";
3196                         if ($action eq 'commitdiff') {
3197                                 # link to patch
3198                                 $patchno++;
3199                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3200                                       " | ";
3201                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3202                                 # "commit" view and modified file (not onlu mode changed)
3203                                 print $cgi->a({-href => href(action=>"blobdiff",
3204                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3205                                                              hash_base=>$hash, hash_parent_base=>$parent,
3206                                                              file_name=>$diff->{'file'})},
3207                                               "diff") .
3208                                       " | ";
3209                         }
3210                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3211                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3212                                        "blob") . " | ";
3213                         if ($have_blame) {
3214                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3215                                                              file_name=>$diff->{'file'})},
3216                                               "blame") . " | ";
3217                         }
3218                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3219                                                      file_name=>$diff->{'file'})},
3220                                       "history");
3221                         print "</td>\n";
3222
3223                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3224                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3225                         my $nstatus = $status_name{$diff->{'status'}};
3226                         my $mode_chng = "";
3227                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3228                                 # mode also for directories, so we cannot use $to_mode_str
3229                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3230                         }
3231                         print "<td>" .
3232                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3233                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3234                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3235                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3236                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3237                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3238                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3239                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3240                               "<td class=\"link\">";
3241                         if ($action eq 'commitdiff') {
3242                                 # link to patch
3243                                 $patchno++;
3244                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3245                                       " | ";
3246                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3247                                 # "commit" view and modified file (not only pure rename or copy)
3248                                 print $cgi->a({-href => href(action=>"blobdiff",
3249                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3250                                                              hash_base=>$hash, hash_parent_base=>$parent,
3251                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3252                                               "diff") .
3253                                       " | ";
3254                         }
3255                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3256                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3257                                       "blob") . " | ";
3258                         if ($have_blame) {
3259                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3260                                                              file_name=>$diff->{'to_file'})},
3261                                               "blame") . " | ";
3262                         }
3263                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3264                                                     file_name=>$diff->{'to_file'})},
3265                                       "history");
3266                         print "</td>\n";
3267
3268                 } # we should not encounter Unmerged (U) or Unknown (X) status
3269                 print "</tr>\n";
3270         }
3271         print "</tbody>" if $has_header;
3272         print "</table>\n";
3273 }
3274
3275 sub git_patchset_body {
3276         my ($fd, $difftree, $hash, @hash_parents) = @_;
3277         my ($hash_parent) = $hash_parents[0];
3278
3279         my $is_combined = (@hash_parents > 1);
3280         my $patch_idx = 0;
3281         my $patch_number = 0;
3282         my $patch_line;
3283         my $diffinfo;
3284         my $to_name;
3285         my (%from, %to);
3286
3287         print "<div class=\"patchset\">\n";
3288
3289         # skip to first patch
3290         while ($patch_line = <$fd>) {
3291                 chomp $patch_line;
3292
3293                 last if ($patch_line =~ m/^diff /);
3294         }
3295
3296  PATCH:
3297         while ($patch_line) {
3298
3299                 # parse "git diff" header line
3300                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3301                         # $1 is from_name, which we do not use
3302                         $to_name = unquote($2);
3303                         $to_name =~ s!^b/!!;
3304                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3305                         # $1 is 'cc' or 'combined', which we do not use
3306                         $to_name = unquote($2);
3307                 } else {
3308                         $to_name = undef;
3309                 }
3310
3311                 # check if current patch belong to current raw line
3312                 # and parse raw git-diff line if needed
3313                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3314                         # this is continuation of a split patch
3315                         print "<div class=\"patch cont\">\n";
3316                 } else {
3317                         # advance raw git-diff output if needed
3318                         $patch_idx++ if defined $diffinfo;
3319
3320                         # read and prepare patch information
3321                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3322
3323                         # compact combined diff output can have some patches skipped
3324                         # find which patch (using pathname of result) we are at now;
3325                         if ($is_combined) {
3326                                 while ($to_name ne $diffinfo->{'to_file'}) {
3327                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3328                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3329                                               "</div>\n";  # class="patch"
3330
3331                                         $patch_idx++;
3332                                         $patch_number++;
3333
3334                                         last if $patch_idx > $#$difftree;
3335                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3336                                 }
3337                         }
3338
3339                         # modifies %from, %to hashes
3340                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3341
3342                         # this is first patch for raw difftree line with $patch_idx index
3343                         # we index @$difftree array from 0, but number patches from 1
3344                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3345                 }
3346
3347                 # git diff header
3348                 #assert($patch_line =~ m/^diff /) if DEBUG;
3349                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3350                 $patch_number++;
3351                 # print "git diff" header
3352                 print format_git_diff_header_line($patch_line, $diffinfo,
3353                                                   \%from, \%to);
3354
3355                 # print extended diff header
3356                 print "<div class=\"diff extended_header\">\n";
3357         EXTENDED_HEADER:
3358                 while ($patch_line = <$fd>) {
3359                         chomp $patch_line;
3360
3361                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3362
3363                         print format_extended_diff_header_line($patch_line, $diffinfo,
3364                                                                \%from, \%to);
3365                 }
3366                 print "</div>\n"; # class="diff extended_header"
3367
3368                 # from-file/to-file diff header
3369                 if (! $patch_line) {
3370                         print "</div>\n"; # class="patch"
3371                         last PATCH;
3372                 }
3373                 next PATCH if ($patch_line =~ m/^diff /);
3374                 #assert($patch_line =~ m/^---/) if DEBUG;
3375
3376                 my $last_patch_line = $patch_line;
3377                 $patch_line = <$fd>;
3378                 chomp $patch_line;
3379                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3380
3381                 print format_diff_from_to_header($last_patch_line, $patch_line,
3382                                                  $diffinfo, \%from, \%to,
3383                                                  @hash_parents);
3384
3385                 # the patch itself
3386         LINE:
3387                 while ($patch_line = <$fd>) {
3388                         chomp $patch_line;
3389
3390                         next PATCH if ($patch_line =~ m/^diff /);
3391
3392                         print format_diff_line($patch_line, \%from, \%to);
3393                 }
3394
3395         } continue {
3396                 print "</div>\n"; # class="patch"
3397         }
3398
3399         # for compact combined (--cc) format, with chunk and patch simpliciaction
3400         # patchset might be empty, but there might be unprocessed raw lines
3401         for (++$patch_idx if $patch_number > 0;
3402              $patch_idx < @$difftree;
3403              ++$patch_idx) {
3404                 # read and prepare patch information
3405                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3406
3407                 # generate anchor for "patch" links in difftree / whatchanged part
3408                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3409                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3410                       "</div>\n";  # class="patch"
3411
3412                 $patch_number++;
3413         }
3414
3415         if ($patch_number == 0) {
3416                 if (@hash_parents > 1) {
3417                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3418                 } else {
3419                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3420                 }
3421         }
3422
3423         print "</div>\n"; # class="patchset"
3424 }
3425
3426 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3427
3428 sub git_project_list_body {
3429         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3430
3431         my ($check_forks) = gitweb_check_feature('forks');
3432
3433         my @projects;
3434         foreach my $pr (@$projlist) {
3435                 my (@aa) = git_get_last_activity($pr->{'path'});
3436                 unless (@aa) {
3437                         next;
3438                 }
3439                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3440                 if (!defined $pr->{'descr'}) {
3441                         my $descr = git_get_project_description($pr->{'path'}) || "";
3442                         $pr->{'descr_long'} = to_utf8($descr);
3443                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3444                 }
3445                 if (!defined $pr->{'owner'}) {
3446                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3447                 }
3448                 if ($check_forks) {
3449                         my $pname = $pr->{'path'};
3450                         if (($pname =~ s/\.git$//) &&
3451                             ($pname !~ /\/$/) &&
3452                             (-d "$projectroot/$pname")) {
3453                                 $pr->{'forks'} = "-d $projectroot/$pname";
3454                         }
3455                         else {
3456                                 $pr->{'forks'} = 0;
3457                         }
3458                 }
3459                 push @projects, $pr;
3460         }
3461
3462         $order ||= $default_projects_order;
3463         $from = 0 unless defined $from;
3464         $to = $#projects if (!defined $to || $#projects < $to);
3465
3466         print "<table class=\"project_list\">\n";
3467         unless ($no_header) {
3468                 print "<tr>\n";
3469                 if ($check_forks) {
3470                         print "<th></th>\n";
3471                 }
3472                 if ($order eq "project") {
3473                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3474                         print "<th>Project</th>\n";
3475                 } else {
3476                         print "<th>" .
3477                               $cgi->a({-href => href(project=>undef, order=>'project'),
3478                                        -class => "header"}, "Project") .
3479                               "</th>\n";
3480                 }
3481                 if ($order eq "descr") {
3482                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3483                         print "<th>Description</th>\n";
3484                 } else {
3485                         print "<th>" .
3486                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3487                                        -class => "header"}, "Description") .
3488                               "</th>\n";
3489                 }
3490                 if ($order eq "owner") {
3491                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3492                         print "<th>Owner</th>\n";
3493                 } else {
3494                         print "<th>" .
3495                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3496                                        -class => "header"}, "Owner") .
3497                               "</th>\n";
3498                 }
3499                 if ($order eq "age") {
3500                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3501                         print "<th>Last Change</th>\n";
3502                 } else {
3503                         print "<th>" .
3504                               $cgi->a({-href => href(project=>undef, order=>'age'),
3505                                        -class => "header"}, "Last Change") .
3506                               "</th>\n";
3507                 }
3508                 print "<th></th>\n" .
3509                       "</tr>\n";
3510         }
3511         my $alternate = 1;
3512         for (my $i = $from; $i <= $to; $i++) {
3513                 my $pr = $projects[$i];
3514                 if ($alternate) {
3515                         print "<tr class=\"dark\">\n";
3516                 } else {
3517                         print "<tr class=\"light\">\n";
3518                 }
3519                 $alternate ^= 1;
3520                 if ($check_forks) {
3521                         print "<td>";
3522                         if ($pr->{'forks'}) {
3523                                 print "<!-- $pr->{'forks'} -->\n";
3524                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3525                         }
3526                         print "</td>\n";
3527                 }
3528                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3529                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3530                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3531                                         -class => "list", -title => $pr->{'descr_long'}},
3532                                         esc_html($pr->{'descr'})) . "</td>\n" .
3533                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3534                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3535                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3536                       "<td class=\"link\">" .
3537                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3538                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3539                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3540                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3541                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3542                       "</td>\n" .
3543                       "</tr>\n";
3544         }
3545         if (defined $extra) {
3546                 print "<tr>\n";
3547                 if ($check_forks) {
3548                         print "<td></td>\n";
3549                 }
3550                 print "<td colspan=\"5\">$extra</td>\n" .
3551                       "</tr>\n";
3552         }
3553         print "</table>\n";
3554 }
3555
3556 sub git_shortlog_body {
3557         # uses global variable $project
3558         my ($commitlist, $from, $to, $refs, $extra) = @_;
3559
3560         $from = 0 unless defined $from;
3561         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3562
3563         print "<table class=\"shortlog\">\n";
3564         my $alternate = 1;
3565         for (my $i = $from; $i <= $to; $i++) {
3566                 my %co = %{$commitlist->[$i]};
3567                 my $commit = $co{'id'};
3568                 my $ref = format_ref_marker($refs, $commit);
3569                 if ($alternate) {
3570                         print "<tr class=\"dark\">\n";
3571                 } else {
3572                         print "<tr class=\"light\">\n";
3573                 }
3574                 $alternate ^= 1;
3575                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3576                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3577                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3578                       "<td><i>" . $author . "</i></td>\n" .
3579                       "<td>";
3580                 print format_subject_html($co{'title'}, $co{'title_short'},
3581                                           href(action=>"commit", hash=>$commit), $ref);
3582                 print "</td>\n" .
3583                       "<td class=\"link\">" .
3584                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3585                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3586                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3587                 my $snapshot_links = format_snapshot_links($commit);
3588                 if (defined $snapshot_links) {
3589                         print " | " . $snapshot_links;
3590                 }
3591                 print "</td>\n" .
3592                       "</tr>\n";
3593         }
3594         if (defined $extra) {
3595                 print "<tr>\n" .
3596                       "<td colspan=\"4\">$extra</td>\n" .
3597                       "</tr>\n";
3598         }
3599         print "</table>\n";
3600 }
3601
3602 sub git_history_body {
3603         # Warning: assumes constant type (blob or tree) during history
3604         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3605
3606         $from = 0 unless defined $from;
3607         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3608
3609         print "<table class=\"history\">\n";
3610         my $alternate = 1;
3611         for (my $i = $from; $i <= $to; $i++) {
3612                 my %co = %{$commitlist->[$i]};
3613                 if (!%co) {
3614                         next;
3615                 }
3616                 my $commit = $co{'id'};
3617
3618                 my $ref = format_ref_marker($refs, $commit);
3619
3620                 if ($alternate) {
3621                         print "<tr class=\"dark\">\n";
3622                 } else {
3623                         print "<tr class=\"light\">\n";
3624                 }
3625                 $alternate ^= 1;
3626         # shortlog uses      chop_str($co{'author_name'}, 10)
3627                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3628                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3629                       "<td><i>" . $author . "</i></td>\n" .
3630                       "<td>";
3631                 # originally git_history used chop_str($co{'title'}, 50)
3632                 print format_subject_html($co{'title'}, $co{'title_short'},
3633                                           href(action=>"commit", hash=>$commit), $ref);
3634                 print "</td>\n" .
3635                       "<td class=\"link\">" .
3636                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3637                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3638
3639                 if ($ftype eq 'blob') {
3640                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3641                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3642                         if (defined $blob_current && defined $blob_parent &&
3643                                         $blob_current ne $blob_parent) {
3644                                 print " | " .
3645                                         $cgi->a({-href => href(action=>"blobdiff",
3646                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3647                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3648                                                                file_name=>$file_name)},
3649                                                 "diff to current");
3650                         }
3651                 }
3652                 print "</td>\n" .
3653                       "</tr>\n";
3654         }
3655         if (defined $extra) {
3656                 print "<tr>\n" .
3657                       "<td colspan=\"4\">$extra</td>\n" .
3658                       "</tr>\n";
3659         }
3660         print "</table>\n";
3661 }
3662
3663 sub git_tags_body {
3664         # uses global variable $project
3665         my ($taglist, $from, $to, $extra) = @_;
3666         $from = 0 unless defined $from;
3667         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3668
3669         print "<table class=\"tags\">\n";
3670         my $alternate = 1;
3671         for (my $i = $from; $i <= $to; $i++) {
3672                 my $entry = $taglist->[$i];
3673                 my %tag = %$entry;
3674                 my $comment = $tag{'subject'};
3675                 my $comment_short;
3676                 if (defined $comment) {
3677                         $comment_short = chop_str($comment, 30, 5);
3678                 }
3679                 if ($alternate) {
3680                         print "<tr class=\"dark\">\n";
3681                 } else {
3682                         print "<tr class=\"light\">\n";
3683                 }
3684                 $alternate ^= 1;
3685                 if (defined $tag{'age'}) {
3686                         print "<td><i>$tag{'age'}</i></td>\n";
3687                 } else {
3688                         print "<td></td>\n";
3689                 }
3690                 print "<td>" .
3691                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3692                                -class => "list name"}, esc_html($tag{'name'})) .
3693                       "</td>\n" .
3694                       "<td>";
3695                 if (defined $comment) {
3696                         print format_subject_html($comment, $comment_short,
3697                                                   href(action=>"tag", hash=>$tag{'id'}));
3698                 }
3699                 print "</td>\n" .
3700                       "<td class=\"selflink\">";
3701                 if ($tag{'type'} eq "tag") {
3702                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3703                 } else {
3704                         print "&nbsp;";
3705                 }
3706                 print "</td>\n" .
3707                       "<td class=\"link\">" . " | " .
3708                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3709                 if ($tag{'reftype'} eq "commit") {
3710                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3711                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3712                 } elsif ($tag{'reftype'} eq "blob") {
3713                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3714                 }
3715                 print "</td>\n" .
3716                       "</tr>";
3717         }
3718         if (defined $extra) {
3719                 print "<tr>\n" .
3720                       "<td colspan=\"5\">$extra</td>\n" .
3721                       "</tr>\n";
3722         }
3723         print "</table>\n";
3724 }
3725
3726 sub git_heads_body {
3727         # uses global variable $project
3728         my ($headlist, $head, $from, $to, $extra) = @_;
3729         $from = 0 unless defined $from;
3730         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3731
3732         print "<table class=\"heads\">\n";
3733         my $alternate = 1;
3734         for (my $i = $from; $i <= $to; $i++) {
3735                 my $entry = $headlist->[$i];
3736                 my %ref = %$entry;
3737                 my $curr = $ref{'id'} eq $head;
3738                 if ($alternate) {
3739                         print "<tr class=\"dark\">\n";
3740                 } else {
3741                         print "<tr class=\"light\">\n";
3742                 }
3743                 $alternate ^= 1;
3744                 print "<td><i>$ref{'age'}</i></td>\n" .
3745                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3746                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3747                                -class => "list name"},esc_html($ref{'name'})) .
3748                       "</td>\n" .
3749                       "<td class=\"link\">" .
3750                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3751                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3752                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3753                       "</td>\n" .
3754                       "</tr>";
3755         }
3756         if (defined $extra) {
3757                 print "<tr>\n" .
3758                       "<td colspan=\"3\">$extra</td>\n" .
3759                       "</tr>\n";
3760         }
3761         print "</table>\n";
3762 }
3763
3764 sub git_search_grep_body {
3765         my ($commitlist, $from, $to, $extra) = @_;
3766         $from = 0 unless defined $from;
3767         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3768
3769         print "<table class=\"commit_search\">\n";
3770         my $alternate = 1;
3771         for (my $i = $from; $i <= $to; $i++) {
3772                 my %co = %{$commitlist->[$i]};
3773                 if (!%co) {
3774                         next;
3775                 }
3776                 my $commit = $co{'id'};
3777                 if ($alternate) {
3778                         print "<tr class=\"dark\">\n";
3779                 } else {
3780                         print "<tr class=\"light\">\n";
3781                 }
3782                 $alternate ^= 1;
3783                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3784                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3785                       "<td><i>" . $author . "</i></td>\n" .
3786                       "<td>" .
3787                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3788                                -class => "list subject"},
3789                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3790                 my $comment = $co{'comment'};
3791                 foreach my $line (@$comment) {
3792                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3793                                 my ($lead, $match, $trail) = ($1, $2, $3);
3794                                 $match = chop_str($match, 70, 5);       # in case match is very long
3795                                 my $contextlen = (80 - len($match))/2;  # is left for the remainder
3796                                 $contextlen = 30 if ($contextlen > 30); # but not too much
3797                                 $lead  = chop_str($lead,  $contextlen, 10);
3798                                 $trail = chop_str($trail, $contextlen, 10);
3799
3800                                 $lead  = esc_html($lead);
3801                                 $match = esc_html($match);
3802                                 $trail = esc_html($trail);
3803
3804                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3805                         }
3806                 }
3807                 print "</td>\n" .
3808                       "<td class=\"link\">" .
3809                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3810                       " | " .
3811                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3812                       " | " .
3813                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3814                 print "</td>\n" .
3815                       "</tr>\n";
3816         }
3817         if (defined $extra) {
3818                 print "<tr>\n" .
3819                       "<td colspan=\"3\">$extra</td>\n" .
3820                       "</tr>\n";
3821         }
3822         print "</table>\n";
3823 }
3824
3825 ## ======================================================================
3826 ## ======================================================================
3827 ## actions
3828
3829 sub git_project_list {
3830         my $order = $cgi->param('o');
3831         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3832                 die_error(undef, "Unknown order parameter");
3833         }
3834
3835         my @list = git_get_projects_list();
3836         if (!@list) {
3837                 die_error(undef, "No projects found");
3838         }
3839
3840         git_header_html();
3841         if (-f $home_text) {
3842                 print "<div class=\"index_include\">\n";
3843                 open (my $fd, $home_text);
3844                 print <$fd>;
3845                 close $fd;
3846                 print "</div>\n";
3847         }
3848         git_project_list_body(\@list, $order);
3849         git_footer_html();
3850 }
3851
3852 sub git_forks {
3853         my $order = $cgi->param('o');
3854         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3855                 die_error(undef, "Unknown order parameter");
3856         }
3857
3858         my @list = git_get_projects_list($project);
3859         if (!@list) {
3860                 die_error(undef, "No forks found");
3861         }
3862
3863         git_header_html();
3864         git_print_page_nav('','');
3865         git_print_header_div('summary', "$project forks");
3866         git_project_list_body(\@list, $order);
3867         git_footer_html();
3868 }
3869
3870 sub git_project_index {
3871         my @projects = git_get_projects_list($project);
3872
3873         print $cgi->header(
3874                 -type => 'text/plain',
3875                 -charset => 'utf-8',
3876                 -content_disposition => 'inline; filename="index.aux"');
3877
3878         foreach my $pr (@projects) {
3879                 if (!exists $pr->{'owner'}) {
3880                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3881                 }
3882
3883                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3884                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3885                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3886                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3887                 $path  =~ s/ /\+/g;
3888                 $owner =~ s/ /\+/g;
3889
3890                 print "$path $owner\n";
3891         }
3892 }
3893
3894 sub git_summary {
3895         my $descr = git_get_project_description($project) || "none";
3896         my %co = parse_commit("HEAD");
3897         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3898         my $head = $co{'id'};
3899
3900         my $owner = git_get_project_owner($project);
3901
3902         my $refs = git_get_references();
3903         # These get_*_list functions return one more to allow us to see if
3904         # there are more ...
3905         my @taglist  = git_get_tags_list(16);
3906         my @headlist = git_get_heads_list(16);
3907         my @forklist;
3908         my ($check_forks) = gitweb_check_feature('forks');
3909
3910         if ($check_forks) {
3911                 @forklist = git_get_projects_list($project);
3912         }
3913
3914         git_header_html();
3915         git_print_page_nav('summary','', $head);
3916
3917         print "<div class=\"title\">&nbsp;</div>\n";
3918         print "<table class=\"projects_list\">\n" .
3919               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3920               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3921         if (defined $cd{'rfc2822'}) {
3922                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3923         }
3924
3925         # use per project git URL list in $projectroot/$project/cloneurl
3926         # or make project git URL from git base URL and project name
3927         my $url_tag = "URL";
3928         my @url_list = git_get_project_url_list($project);
3929         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3930         foreach my $git_url (@url_list) {
3931                 next unless $git_url;
3932                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3933                 $url_tag = "";
3934         }
3935         print "</table>\n";
3936
3937         if (-s "$projectroot/$project/README.html") {
3938                 if (open my $fd, "$projectroot/$project/README.html") {
3939                         print "<div class=\"title\">readme</div>\n" .
3940                               "<div class=\"readme\">\n";
3941                         print $_ while (<$fd>);
3942                         print "\n</div>\n"; # class="readme"
3943                         close $fd;
3944                 }
3945         }
3946
3947         # we need to request one more than 16 (0..15) to check if
3948         # those 16 are all
3949         my @commitlist = $head ? parse_commits($head, 17) : ();
3950         if (@commitlist) {
3951                 git_print_header_div('shortlog');
3952                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3953                                   $#commitlist <=  15 ? undef :
3954                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3955         }
3956
3957         if (@taglist) {
3958                 git_print_header_div('tags');
3959                 git_tags_body(\@taglist, 0, 15,
3960                               $#taglist <=  15 ? undef :
3961                               $cgi->a({-href => href(action=>"tags")}, "..."));
3962         }
3963
3964         if (@headlist) {
3965                 git_print_header_div('heads');
3966                 git_heads_body(\@headlist, $head, 0, 15,
3967                                $#headlist <= 15 ? undef :
3968                                $cgi->a({-href => href(action=>"heads")}, "..."));
3969         }
3970
3971         if (@forklist) {
3972                 git_print_header_div('forks');
3973                 git_project_list_body(\@forklist, undef, 0, 15,
3974                                       $#forklist <= 15 ? undef :
3975                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3976                                       'noheader');
3977         }
3978
3979         git_footer_html();
3980 }
3981
3982 sub git_tag {
3983         my $head = git_get_head_hash($project);
3984         git_header_html();
3985         git_print_page_nav('','', $head,undef,$head);
3986         my %tag = parse_tag($hash);
3987
3988         if (! %tag) {
3989                 die_error(undef, "Unknown tag object");
3990         }
3991
3992         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3993         print "<div class=\"title_text\">\n" .
3994               "<table class=\"object_header\">\n" .
3995               "<tr>\n" .
3996               "<td>object</td>\n" .
3997               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3998                                $tag{'object'}) . "</td>\n" .
3999               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4000                                               $tag{'type'}) . "</td>\n" .
4001               "</tr>\n";
4002         if (defined($tag{'author'})) {
4003                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4004                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4005                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4006                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4007                         "</td></tr>\n";
4008         }
4009         print "</table>\n\n" .
4010               "</div>\n";
4011         print "<div class=\"page_body\">";
4012         my $comment = $tag{'comment'};
4013         foreach my $line (@$comment) {
4014                 chomp $line;
4015                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4016         }
4017         print "</div>\n";
4018         git_footer_html();
4019 }
4020
4021 sub git_blame2 {
4022         my $fd;
4023         my $ftype;
4024
4025         my ($have_blame) = gitweb_check_feature('blame');
4026         if (!$have_blame) {
4027                 die_error('403 Permission denied', "Permission denied");
4028         }
4029         die_error('404 Not Found', "File name not defined") if (!$file_name);
4030         $hash_base ||= git_get_head_hash($project);
4031         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4032         my %co = parse_commit($hash_base)
4033                 or die_error(undef, "Reading commit failed");
4034         if (!defined $hash) {
4035                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4036                         or die_error(undef, "Error looking up file");
4037         }
4038         $ftype = git_get_type($hash);
4039         if ($ftype !~ "blob") {
4040                 die_error('400 Bad Request', "Object is not a blob");
4041         }
4042         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4043               $file_name, $hash_base)
4044                 or die_error(undef, "Open git-blame failed");
4045         git_header_html();
4046         my $formats_nav =
4047                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4048                         "blob") .
4049                 " | " .
4050                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4051                         "history") .
4052                 " | " .
4053                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4054                         "HEAD");
4055         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4056         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4057         git_print_page_path($file_name, $ftype, $hash_base);
4058         my @rev_color = (qw(light2 dark2));
4059         my $num_colors = scalar(@rev_color);
4060         my $current_color = 0;
4061         my $last_rev;
4062         print <<HTML;
4063 <div class="page_body">
4064 <table class="blame">
4065 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4066 HTML
4067         my %metainfo = ();
4068         while (1) {
4069                 $_ = <$fd>;
4070                 last unless defined $_;
4071                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4072                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4073                 if (!exists $metainfo{$full_rev}) {
4074                         $metainfo{$full_rev} = {};
4075                 }
4076                 my $meta = $metainfo{$full_rev};
4077                 while (<$fd>) {
4078                         last if (s/^\t//);
4079                         if (/^(\S+) (.*)$/) {
4080                                 $meta->{$1} = $2;
4081                         }
4082                 }
4083                 my $data = $_;
4084                 chomp $data;
4085                 my $rev = substr($full_rev, 0, 8);
4086                 my $author = $meta->{'author'};
4087                 my %date = parse_date($meta->{'author-time'},
4088                                       $meta->{'author-tz'});
4089                 my $date = $date{'iso-tz'};
4090                 if ($group_size) {
4091                         $current_color = ++$current_color % $num_colors;
4092                 }
4093                 print "<tr class=\"$rev_color[$current_color]\">\n";
4094                 if ($group_size) {
4095                         print "<td class=\"sha1\"";
4096                         print " title=\"". esc_html($author) . ", $date\"";
4097                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4098                         print ">";
4099                         print $cgi->a({-href => href(action=>"commit",
4100                                                      hash=>$full_rev,
4101                                                      file_name=>$file_name)},
4102                                       esc_html($rev));
4103                         print "</td>\n";
4104                 }
4105                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4106                         or die_error(undef, "Open git-rev-parse failed");
4107                 my $parent_commit = <$dd>;
4108                 close $dd;
4109                 chomp($parent_commit);
4110                 my $blamed = href(action => 'blame',
4111                                   file_name => $meta->{'filename'},
4112                                   hash_base => $parent_commit);
4113                 print "<td class=\"linenr\">";
4114                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4115                                 -id => "l$lineno",
4116                                 -class => "linenr" },
4117                               esc_html($lineno));
4118                 print "</td>";
4119                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4120                 print "</tr>\n";
4121         }
4122         print "</table>\n";
4123         print "</div>";
4124         close $fd
4125                 or print "Reading blob failed\n";
4126         git_footer_html();
4127 }
4128
4129 sub git_blame {
4130         my $fd;
4131
4132         my ($have_blame) = gitweb_check_feature('blame');
4133         if (!$have_blame) {
4134                 die_error('403 Permission denied', "Permission denied");
4135         }
4136         die_error('404 Not Found', "File name not defined") if (!$file_name);
4137         $hash_base ||= git_get_head_hash($project);
4138         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4139         my %co = parse_commit($hash_base)
4140                 or die_error(undef, "Reading commit failed");
4141         if (!defined $hash) {
4142                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4143                         or die_error(undef, "Error lookup file");
4144         }
4145         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4146                 or die_error(undef, "Open git-annotate failed");
4147         git_header_html();
4148         my $formats_nav =
4149                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4150                         "blob") .
4151                 " | " .
4152                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4153                         "history") .
4154                 " | " .
4155                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4156                         "HEAD");
4157         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4158         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4159         git_print_page_path($file_name, 'blob', $hash_base);
4160         print "<div class=\"page_body\">\n";
4161         print <<HTML;
4162 <table class="blame">
4163   <tr>
4164     <th>Commit</th>
4165     <th>Age</th>
4166     <th>Author</th>
4167     <th>Line</th>
4168     <th>Data</th>
4169   </tr>
4170 HTML
4171         my @line_class = (qw(light dark));
4172         my $line_class_len = scalar (@line_class);
4173         my $line_class_num = $#line_class;
4174         while (my $line = <$fd>) {
4175                 my $long_rev;
4176                 my $short_rev;
4177                 my $author;
4178                 my $time;
4179                 my $lineno;
4180                 my $data;
4181                 my $age;
4182                 my $age_str;
4183                 my $age_class;
4184
4185                 chomp $line;
4186                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4187
4188                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4189                         $long_rev = $1;
4190                         $author   = $2;
4191                         $time     = $3;
4192                         $lineno   = $4;
4193                         $data     = $5;
4194                 } else {
4195                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4196                         next;
4197                 }
4198                 $short_rev  = substr ($long_rev, 0, 8);
4199                 $age        = time () - $time;
4200                 $age_str    = age_string ($age);
4201                 $age_str    =~ s/ /&nbsp;/g;
4202                 $age_class  = age_class($age);
4203                 $author     = esc_html ($author);
4204                 $author     =~ s/ /&nbsp;/g;
4205
4206                 $data = untabify($data);
4207                 $data = esc_html ($data);
4208
4209                 print <<HTML;
4210   <tr class="$line_class[$line_class_num]">
4211     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4212     <td class="$age_class">$age_str</td>
4213     <td>$author</td>
4214     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4215     <td class="pre">$data</td>
4216   </tr>
4217 HTML
4218         } # while (my $line = <$fd>)
4219         print "</table>\n\n";
4220         close $fd
4221                 or print "Reading blob failed.\n";
4222         print "</div>";
4223         git_footer_html();
4224 }
4225
4226 sub git_tags {
4227         my $head = git_get_head_hash($project);
4228         git_header_html();
4229         git_print_page_nav('','', $head,undef,$head);
4230         git_print_header_div('summary', $project);
4231
4232         my @tagslist = git_get_tags_list();
4233         if (@tagslist) {
4234                 git_tags_body(\@tagslist);
4235         }
4236         git_footer_html();
4237 }
4238
4239 sub git_heads {
4240         my $head = git_get_head_hash($project);
4241         git_header_html();
4242         git_print_page_nav('','', $head,undef,$head);
4243         git_print_header_div('summary', $project);
4244
4245         my @headslist = git_get_heads_list();
4246         if (@headslist) {
4247                 git_heads_body(\@headslist, $head);
4248         }
4249         git_footer_html();
4250 }
4251
4252 sub git_blob_plain {
4253         my $expires;
4254
4255         if (!defined $hash) {
4256                 if (defined $file_name) {
4257                         my $base = $hash_base || git_get_head_hash($project);
4258                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4259                                 or die_error(undef, "Error lookup file");
4260                 } else {
4261                         die_error(undef, "No file name defined");
4262                 }
4263         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4264                 # blobs defined by non-textual hash id's can be cached
4265                 $expires = "+1d";
4266         }
4267
4268         my $type = shift;
4269         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4270                 or die_error(undef, "Couldn't cat $file_name, $hash");
4271
4272         $type ||= blob_mimetype($fd, $file_name);
4273
4274         # save as filename, even when no $file_name is given
4275         my $save_as = "$hash";
4276         if (defined $file_name) {
4277                 $save_as = $file_name;
4278         } elsif ($type =~ m/^text\//) {
4279                 $save_as .= '.txt';
4280         }
4281
4282         print $cgi->header(
4283                 -type => "$type",
4284                 -expires=>$expires,
4285                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4286         undef $/;
4287         binmode STDOUT, ':raw';
4288         print <$fd>;
4289         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4290         $/ = "\n";
4291         close $fd;
4292 }
4293
4294 sub git_blob {
4295         my $expires;
4296
4297         if (!defined $hash) {
4298                 if (defined $file_name) {
4299                         my $base = $hash_base || git_get_head_hash($project);
4300                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4301                                 or die_error(undef, "Error lookup file");
4302                 } else {
4303                         die_error(undef, "No file name defined");
4304                 }
4305         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4306                 # blobs defined by non-textual hash id's can be cached
4307                 $expires = "+1d";
4308         }
4309
4310         my ($have_blame) = gitweb_check_feature('blame');
4311         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4312                 or die_error(undef, "Couldn't cat $file_name, $hash");
4313         my $mimetype = blob_mimetype($fd, $file_name);
4314         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4315                 close $fd;
4316                 return git_blob_plain($mimetype);
4317         }
4318         # we can have blame only for text/* mimetype
4319         $have_blame &&= ($mimetype =~ m!^text/!);
4320
4321         git_header_html(undef, $expires);
4322         my $formats_nav = '';
4323         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4324                 if (defined $file_name) {
4325                         if ($have_blame) {
4326                                 $formats_nav .=
4327                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4328                                                 "blame") .
4329                                         " | ";
4330                         }
4331                         $formats_nav .=
4332                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4333                                         "history") .
4334                                 " | " .
4335                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4336                                         "raw") .
4337                                 " | " .
4338                                 $cgi->a({-href => href(action=>"blob",
4339                                                        hash_base=>"HEAD", file_name=>$file_name)},
4340                                         "HEAD");
4341                 } else {
4342                         $formats_nav .=
4343                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4344                                         "raw");
4345                 }
4346                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4347                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4348         } else {
4349                 print "<div class=\"page_nav\">\n" .
4350                       "<br/><br/></div>\n" .
4351                       "<div class=\"title\">$hash</div>\n";
4352         }
4353         git_print_page_path($file_name, "blob", $hash_base);
4354         print "<div class=\"page_body\">\n";
4355         if ($mimetype =~ m!^image/!) {
4356                 print qq!<img type="$mimetype"!;
4357                 if ($file_name) {
4358                         print qq! alt="$file_name" title="$file_name"!;
4359                 }
4360                 print qq! src="! .
4361                       href(action=>"blob_plain", hash=>$hash,
4362                            hash_base=>$hash_base, file_name=>$file_name) .
4363                       qq!" />\n!;
4364         } else {
4365                 my $nr;
4366                 while (my $line = <$fd>) {
4367                         chomp $line;
4368                         $nr++;
4369                         $line = untabify($line);
4370                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4371                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4372                 }
4373         }
4374         close $fd
4375                 or print "Reading blob failed.\n";
4376         print "</div>";
4377         git_footer_html();
4378 }
4379
4380 sub git_tree {
4381         if (!defined $hash_base) {
4382                 $hash_base = "HEAD";
4383         }
4384         if (!defined $hash) {
4385                 if (defined $file_name) {
4386                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4387                 } else {
4388                         $hash = $hash_base;
4389                 }
4390         }
4391         $/ = "\0";
4392         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4393                 or die_error(undef, "Open git-ls-tree failed");
4394         my @entries = map { chomp; $_ } <$fd>;
4395         close $fd or die_error(undef, "Reading tree failed");
4396         $/ = "\n";
4397
4398         my $refs = git_get_references();
4399         my $ref = format_ref_marker($refs, $hash_base);
4400         git_header_html();
4401         my $basedir = '';
4402         my ($have_blame) = gitweb_check_feature('blame');
4403         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4404                 my @views_nav = ();
4405                 if (defined $file_name) {
4406                         push @views_nav,
4407                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4408                                         "history"),
4409                                 $cgi->a({-href => href(action=>"tree",
4410                                                        hash_base=>"HEAD", file_name=>$file_name)},
4411                                         "HEAD"),
4412                 }
4413                 my $snapshot_links = format_snapshot_links($hash);
4414                 if (defined $snapshot_links) {
4415                         # FIXME: Should be available when we have no hash base as well.
4416                         push @views_nav, $snapshot_links;
4417                 }
4418                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4419                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4420         } else {
4421                 undef $hash_base;
4422                 print "<div class=\"page_nav\">\n";
4423                 print "<br/><br/></div>\n";
4424                 print "<div class=\"title\">$hash</div>\n";
4425         }
4426         if (defined $file_name) {
4427                 $basedir = $file_name;
4428                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4429                         $basedir .= '/';
4430                 }
4431         }
4432         git_print_page_path($file_name, 'tree', $hash_base);
4433         print "<div class=\"page_body\">\n";
4434         print "<table class=\"tree\">\n";
4435         my $alternate = 1;
4436         # '..' (top directory) link if possible
4437         if (defined $hash_base &&
4438             defined $file_name && $file_name =~ m![^/]+$!) {
4439                 if ($alternate) {
4440                         print "<tr class=\"dark\">\n";
4441                 } else {
4442                         print "<tr class=\"light\">\n";
4443                 }
4444                 $alternate ^= 1;
4445
4446                 my $up = $file_name;
4447                 $up =~ s!/?[^/]+$!!;
4448                 undef $up unless $up;
4449                 # based on git_print_tree_entry
4450                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4451                 print '<td class="list">';
4452                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4453                                              file_name=>$up)},
4454                               "..");
4455                 print "</td>\n";
4456                 print "<td class=\"link\"></td>\n";
4457
4458                 print "</tr>\n";
4459         }
4460         foreach my $line (@entries) {
4461                 my %t = parse_ls_tree_line($line, -z => 1);
4462
4463                 if ($alternate) {
4464                         print "<tr class=\"dark\">\n";
4465                 } else {
4466                         print "<tr class=\"light\">\n";
4467                 }
4468                 $alternate ^= 1;
4469
4470                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4471
4472                 print "</tr>\n";
4473         }
4474         print "</table>\n" .
4475               "</div>";
4476         git_footer_html();
4477 }
4478
4479 sub git_snapshot {
4480         my @supported_fmts = gitweb_check_feature('snapshot');
4481         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4482
4483         my $format = $cgi->param('sf');
4484         if (!@supported_fmts) {
4485                 die_error('403 Permission denied', "Permission denied");
4486         }
4487         # default to first supported snapshot format
4488         $format ||= $supported_fmts[0];
4489         if ($format !~ m/^[a-z0-9]+$/) {
4490                 die_error(undef, "Invalid snapshot format parameter");
4491         } elsif (!exists($known_snapshot_formats{$format})) {
4492                 die_error(undef, "Unknown snapshot format");
4493         } elsif (!grep($_ eq $format, @supported_fmts)) {
4494                 die_error(undef, "Unsupported snapshot format");
4495         }
4496
4497         if (!defined $hash) {
4498                 $hash = git_get_head_hash($project);
4499         }
4500
4501         my $git_command = git_cmd_str();
4502         my $name = $project;
4503         $name =~ s,([^/])/*\.git$,$1,;
4504         $name = basename($name);
4505         my $filename = to_utf8($name);
4506         $name =~ s/\047/\047\\\047\047/g;
4507         my $cmd;
4508         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4509         $cmd = "$git_command archive " .
4510                 "--format=$known_snapshot_formats{$format}{'format'} " .
4511                 "--prefix=\'$name\'/ $hash";
4512         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4513                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4514         }
4515
4516         print $cgi->header(
4517                 -type => $known_snapshot_formats{$format}{'type'},
4518                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4519                 -status => '200 OK');
4520
4521         open my $fd, "-|", $cmd
4522                 or die_error(undef, "Execute git-archive failed");
4523         binmode STDOUT, ':raw';
4524         print <$fd>;
4525         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4526         close $fd;
4527 }
4528
4529 sub git_log {
4530         my $head = git_get_head_hash($project);
4531         if (!defined $hash) {
4532                 $hash = $head;
4533         }
4534         if (!defined $page) {
4535                 $page = 0;
4536         }
4537         my $refs = git_get_references();
4538
4539         my @commitlist = parse_commits($hash, 101, (100 * $page));
4540
4541         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4542
4543         git_header_html();
4544         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4545
4546         if (!@commitlist) {
4547                 my %co = parse_commit($hash);
4548
4549                 git_print_header_div('summary', $project);
4550                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4551         }
4552         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4553         for (my $i = 0; $i <= $to; $i++) {
4554                 my %co = %{$commitlist[$i]};
4555                 next if !%co;
4556                 my $commit = $co{'id'};
4557                 my $ref = format_ref_marker($refs, $commit);
4558                 my %ad = parse_date($co{'author_epoch'});
4559                 git_print_header_div('commit',
4560                                "<span class=\"age\">$co{'age_string'}</span>" .
4561                                esc_html($co{'title'}) . $ref,
4562                                $commit);
4563                 print "<div class=\"title_text\">\n" .
4564                       "<div class=\"log_link\">\n" .
4565                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4566                       " | " .
4567                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4568                       " | " .
4569                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4570                       "<br/>\n" .
4571                       "</div>\n" .
4572                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4573                       "</div>\n";
4574
4575                 print "<div class=\"log_body\">\n";
4576                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4577                 print "</div>\n";
4578         }
4579         if ($#commitlist >= 100) {
4580                 print "<div class=\"page_nav\">\n";
4581                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4582                                -accesskey => "n", -title => "Alt-n"}, "next");
4583                 print "</div>\n";
4584         }
4585         git_footer_html();
4586 }
4587
4588 sub git_commit {
4589         $hash ||= $hash_base || "HEAD";
4590         my %co = parse_commit($hash);
4591         if (!%co) {
4592                 die_error(undef, "Unknown commit object");
4593         }
4594         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4595         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4596
4597         my $parent  = $co{'parent'};
4598         my $parents = $co{'parents'}; # listref
4599
4600         # we need to prepare $formats_nav before any parameter munging
4601         my $formats_nav;
4602         if (!defined $parent) {
4603                 # --root commitdiff
4604                 $formats_nav .= '(initial)';
4605         } elsif (@$parents == 1) {
4606                 # single parent commit
4607                 $formats_nav .=
4608                         '(parent: ' .
4609                         $cgi->a({-href => href(action=>"commit",
4610                                                hash=>$parent)},
4611                                 esc_html(substr($parent, 0, 7))) .
4612                         ')';
4613         } else {
4614                 # merge commit
4615                 $formats_nav .=
4616                         '(merge: ' .
4617                         join(' ', map {
4618                                 $cgi->a({-href => href(action=>"commit",
4619                                                        hash=>$_)},
4620                                         esc_html(substr($_, 0, 7)));
4621                         } @$parents ) .
4622                         ')';
4623         }
4624
4625         if (!defined $parent) {
4626                 $parent = "--root";
4627         }
4628         my @difftree;
4629         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4630                 @diff_opts,
4631                 (@$parents <= 1 ? $parent : '-c'),
4632                 $hash, "--"
4633                 or die_error(undef, "Open git-diff-tree failed");
4634         @difftree = map { chomp; $_ } <$fd>;
4635         close $fd or die_error(undef, "Reading git-diff-tree failed");
4636
4637         # non-textual hash id's can be cached
4638         my $expires;
4639         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4640                 $expires = "+1d";
4641         }
4642         my $refs = git_get_references();
4643         my $ref = format_ref_marker($refs, $co{'id'});
4644
4645         git_header_html(undef, $expires);
4646         git_print_page_nav('commit', '',
4647                            $hash, $co{'tree'}, $hash,
4648                            $formats_nav);
4649
4650         if (defined $co{'parent'}) {
4651                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4652         } else {
4653                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4654         }
4655         print "<div class=\"title_text\">\n" .
4656               "<table class=\"object_header\">\n";
4657         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4658               "<tr>" .
4659               "<td></td><td> $ad{'rfc2822'}";
4660         if ($ad{'hour_local'} < 6) {
4661                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4662                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4663         } else {
4664                 printf(" (%02d:%02d %s)",
4665                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4666         }
4667         print "</td>" .
4668               "</tr>\n";
4669         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4670         print "<tr><td></td><td> $cd{'rfc2822'}" .
4671               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4672               "</td></tr>\n";
4673         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4674         print "<tr>" .
4675               "<td>tree</td>" .
4676               "<td class=\"sha1\">" .
4677               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4678                        class => "list"}, $co{'tree'}) .
4679               "</td>" .
4680               "<td class=\"link\">" .
4681               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4682                       "tree");
4683         my $snapshot_links = format_snapshot_links($hash);
4684         if (defined $snapshot_links) {
4685                 print " | " . $snapshot_links;
4686         }
4687         print "</td>" .
4688               "</tr>\n";
4689
4690         foreach my $par (@$parents) {
4691                 print "<tr>" .
4692                       "<td>parent</td>" .
4693                       "<td class=\"sha1\">" .
4694                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4695                                class => "list"}, $par) .
4696                       "</td>" .
4697                       "<td class=\"link\">" .
4698                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4699                       " | " .
4700                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4701                       "</td>" .
4702                       "</tr>\n";
4703         }
4704         print "</table>".
4705               "</div>\n";
4706
4707         print "<div class=\"page_body\">\n";
4708         git_print_log($co{'comment'});
4709         print "</div>\n";
4710
4711         git_difftree_body(\@difftree, $hash, @$parents);
4712
4713         git_footer_html();
4714 }
4715
4716 sub git_object {
4717         # object is defined by:
4718         # - hash or hash_base alone
4719         # - hash_base and file_name
4720         my $type;
4721
4722         # - hash or hash_base alone
4723         if ($hash || ($hash_base && !defined $file_name)) {
4724                 my $object_id = $hash || $hash_base;
4725
4726                 my $git_command = git_cmd_str();
4727                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4728                         or die_error('404 Not Found', "Object does not exist");
4729                 $type = <$fd>;
4730                 chomp $type;
4731                 close $fd
4732                         or die_error('404 Not Found', "Object does not exist");
4733
4734         # - hash_base and file_name
4735         } elsif ($hash_base && defined $file_name) {
4736                 $file_name =~ s,/+$,,;
4737
4738                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4739                         or die_error('404 Not Found', "Base object does not exist");
4740
4741                 # here errors should not hapen
4742                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4743                         or die_error(undef, "Open git-ls-tree failed");
4744                 my $line = <$fd>;
4745                 close $fd;
4746
4747                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4748                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4749                         die_error('404 Not Found', "File or directory for given base does not exist");
4750                 }
4751                 $type = $2;
4752                 $hash = $3;
4753         } else {
4754                 die_error('404 Not Found', "Not enough information to find object");
4755         }
4756
4757         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4758                                           hash=>$hash, hash_base=>$hash_base,
4759                                           file_name=>$file_name),
4760                              -status => '302 Found');
4761 }
4762
4763 sub git_blobdiff {
4764         my $format = shift || 'html';
4765
4766         my $fd;
4767         my @difftree;
4768         my %diffinfo;
4769         my $expires;
4770
4771         # preparing $fd and %diffinfo for git_patchset_body
4772         # new style URI
4773         if (defined $hash_base && defined $hash_parent_base) {
4774                 if (defined $file_name) {
4775                         # read raw output
4776                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4777                                 $hash_parent_base, $hash_base,
4778                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4779                                 or die_error(undef, "Open git-diff-tree failed");
4780                         @difftree = map { chomp; $_ } <$fd>;
4781                         close $fd
4782                                 or die_error(undef, "Reading git-diff-tree failed");
4783                         @difftree
4784                                 or die_error('404 Not Found', "Blob diff not found");
4785
4786                 } elsif (defined $hash &&
4787                          $hash =~ /[0-9a-fA-F]{40}/) {
4788                         # try to find filename from $hash
4789
4790                         # read filtered raw output
4791                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4792                                 $hash_parent_base, $hash_base, "--"
4793                                 or die_error(undef, "Open git-diff-tree failed");
4794                         @difftree =
4795                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4796                                 # $hash == to_id
4797                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4798                                 map { chomp; $_ } <$fd>;
4799                         close $fd
4800                                 or die_error(undef, "Reading git-diff-tree failed");
4801                         @difftree
4802                                 or die_error('404 Not Found', "Blob diff not found");
4803
4804                 } else {
4805                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4806                 }
4807
4808                 if (@difftree > 1) {
4809                         die_error('404 Not Found', "Ambiguous blob diff specification");
4810                 }
4811
4812                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4813                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4814                 $file_name   ||= $diffinfo{'to_file'};
4815
4816                 $hash_parent ||= $diffinfo{'from_id'};
4817                 $hash        ||= $diffinfo{'to_id'};
4818
4819                 # non-textual hash id's can be cached
4820                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4821                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4822                         $expires = '+1d';
4823                 }
4824
4825                 # open patch output
4826                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4827                         '-p', ($format eq 'html' ? "--full-index" : ()),
4828                         $hash_parent_base, $hash_base,
4829                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4830                         or die_error(undef, "Open git-diff-tree failed");
4831         }
4832
4833         # old/legacy style URI
4834         if (!%diffinfo && # if new style URI failed
4835             defined $hash && defined $hash_parent) {
4836                 # fake git-diff-tree raw output
4837                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4838                 $diffinfo{'from_id'} = $hash_parent;
4839                 $diffinfo{'to_id'}   = $hash;
4840                 if (defined $file_name) {
4841                         if (defined $file_parent) {
4842                                 $diffinfo{'status'} = '2';
4843                                 $diffinfo{'from_file'} = $file_parent;
4844                                 $diffinfo{'to_file'}   = $file_name;
4845                         } else { # assume not renamed
4846                                 $diffinfo{'status'} = '1';
4847                                 $diffinfo{'from_file'} = $file_name;
4848                                 $diffinfo{'to_file'}   = $file_name;
4849                         }
4850                 } else { # no filename given
4851                         $diffinfo{'status'} = '2';
4852                         $diffinfo{'from_file'} = $hash_parent;
4853                         $diffinfo{'to_file'}   = $hash;
4854                 }
4855
4856                 # non-textual hash id's can be cached
4857                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4858                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4859                         $expires = '+1d';
4860                 }
4861
4862                 # open patch output
4863                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4864                         '-p', ($format eq 'html' ? "--full-index" : ()),
4865                         $hash_parent, $hash, "--"
4866                         or die_error(undef, "Open git-diff failed");
4867         } else  {
4868                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4869                         unless %diffinfo;
4870         }
4871
4872         # header
4873         if ($format eq 'html') {
4874                 my $formats_nav =
4875                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4876                                 "raw");
4877                 git_header_html(undef, $expires);
4878                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4879                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4880                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4881                 } else {
4882                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4883                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4884                 }
4885                 if (defined $file_name) {
4886                         git_print_page_path($file_name, "blob", $hash_base);
4887                 } else {
4888                         print "<div class=\"page_path\"></div>\n";
4889                 }
4890
4891         } elsif ($format eq 'plain') {
4892                 print $cgi->header(
4893                         -type => 'text/plain',
4894                         -charset => 'utf-8',
4895                         -expires => $expires,
4896                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4897
4898                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4899
4900         } else {
4901                 die_error(undef, "Unknown blobdiff format");
4902         }
4903
4904         # patch
4905         if ($format eq 'html') {
4906                 print "<div class=\"page_body\">\n";
4907
4908                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4909                 close $fd;
4910
4911                 print "</div>\n"; # class="page_body"
4912                 git_footer_html();
4913
4914         } else {
4915                 while (my $line = <$fd>) {
4916                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4917                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4918
4919                         print $line;
4920
4921                         last if $line =~ m!^\+\+\+!;
4922                 }
4923                 local $/ = undef;
4924                 print <$fd>;
4925                 close $fd;
4926         }
4927 }
4928
4929 sub git_blobdiff_plain {
4930         git_blobdiff('plain');
4931 }
4932
4933 sub git_commitdiff {
4934         my $format = shift || 'html';
4935         $hash ||= $hash_base || "HEAD";
4936         my %co = parse_commit($hash);
4937         if (!%co) {
4938                 die_error(undef, "Unknown commit object");
4939         }
4940
4941         # choose format for commitdiff for merge
4942         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4943                 $hash_parent = '--cc';
4944         }
4945         # we need to prepare $formats_nav before almost any parameter munging
4946         my $formats_nav;
4947         if ($format eq 'html') {
4948                 $formats_nav =
4949                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4950                                 "raw");
4951
4952                 if (defined $hash_parent &&
4953                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4954                         # commitdiff with two commits given
4955                         my $hash_parent_short = $hash_parent;
4956                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4957                                 $hash_parent_short = substr($hash_parent, 0, 7);
4958                         }
4959                         $formats_nav .=
4960                                 ' (from';
4961                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4962                                 if ($co{'parents'}[$i] eq $hash_parent) {
4963                                         $formats_nav .= ' parent ' . ($i+1);
4964                                         last;
4965                                 }
4966                         }
4967                         $formats_nav .= ': ' .
4968                                 $cgi->a({-href => href(action=>"commitdiff",
4969                                                        hash=>$hash_parent)},
4970                                         esc_html($hash_parent_short)) .
4971                                 ')';
4972                 } elsif (!$co{'parent'}) {
4973                         # --root commitdiff
4974                         $formats_nav .= ' (initial)';
4975                 } elsif (scalar @{$co{'parents'}} == 1) {
4976                         # single parent commit
4977                         $formats_nav .=
4978                                 ' (parent: ' .
4979                                 $cgi->a({-href => href(action=>"commitdiff",
4980                                                        hash=>$co{'parent'})},
4981                                         esc_html(substr($co{'parent'}, 0, 7))) .
4982                                 ')';
4983                 } else {
4984                         # merge commit
4985                         if ($hash_parent eq '--cc') {
4986                                 $formats_nav .= ' | ' .
4987                                         $cgi->a({-href => href(action=>"commitdiff",
4988                                                                hash=>$hash, hash_parent=>'-c')},
4989                                                 'combined');
4990                         } else { # $hash_parent eq '-c'
4991                                 $formats_nav .= ' | ' .
4992                                         $cgi->a({-href => href(action=>"commitdiff",
4993                                                                hash=>$hash, hash_parent=>'--cc')},
4994                                                 'compact');
4995                         }
4996                         $formats_nav .=
4997                                 ' (merge: ' .
4998                                 join(' ', map {
4999                                         $cgi->a({-href => href(action=>"commitdiff",
5000                                                                hash=>$_)},
5001                                                 esc_html(substr($_, 0, 7)));
5002                                 } @{$co{'parents'}} ) .
5003                                 ')';
5004                 }
5005         }
5006
5007         my $hash_parent_param = $hash_parent;
5008         if (!defined $hash_parent_param) {
5009                 # --cc for multiple parents, --root for parentless
5010                 $hash_parent_param =
5011                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5012         }
5013
5014         # read commitdiff
5015         my $fd;
5016         my @difftree;
5017         if ($format eq 'html') {
5018                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5019                         "--no-commit-id", "--patch-with-raw", "--full-index",
5020                         $hash_parent_param, $hash, "--"
5021                         or die_error(undef, "Open git-diff-tree failed");
5022
5023                 while (my $line = <$fd>) {
5024                         chomp $line;
5025                         # empty line ends raw part of diff-tree output
5026                         last unless $line;
5027                         push @difftree, scalar parse_difftree_raw_line($line);
5028                 }
5029
5030         } elsif ($format eq 'plain') {
5031                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5032                         '-p', $hash_parent_param, $hash, "--"
5033                         or die_error(undef, "Open git-diff-tree failed");
5034
5035         } else {
5036                 die_error(undef, "Unknown commitdiff format");
5037         }
5038
5039         # non-textual hash id's can be cached
5040         my $expires;
5041         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5042                 $expires = "+1d";
5043         }
5044
5045         # write commit message
5046         if ($format eq 'html') {
5047                 my $refs = git_get_references();
5048                 my $ref = format_ref_marker($refs, $co{'id'});
5049
5050                 git_header_html(undef, $expires);
5051                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5052                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5053                 git_print_authorship(\%co);
5054                 print "<div class=\"page_body\">\n";
5055                 if (@{$co{'comment'}} > 1) {
5056                         print "<div class=\"log\">\n";
5057                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5058                         print "</div>\n"; # class="log"
5059                 }
5060
5061         } elsif ($format eq 'plain') {
5062                 my $refs = git_get_references("tags");
5063                 my $tagname = git_get_rev_name_tags($hash);
5064                 my $filename = basename($project) . "-$hash.patch";
5065
5066                 print $cgi->header(
5067                         -type => 'text/plain',
5068                         -charset => 'utf-8',
5069                         -expires => $expires,
5070                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5071                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5072                 print "From: " . to_utf8($co{'author'}) . "\n";
5073                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5074                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5075
5076                 print "X-Git-Tag: $tagname\n" if $tagname;
5077                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5078
5079                 foreach my $line (@{$co{'comment'}}) {
5080                         print to_utf8($line) . "\n";
5081                 }
5082                 print "---\n\n";
5083         }
5084
5085         # write patch
5086         if ($format eq 'html') {
5087                 my $use_parents = !defined $hash_parent ||
5088                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5089                 git_difftree_body(\@difftree, $hash,
5090                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5091                 print "<br/>\n";
5092
5093                 git_patchset_body($fd, \@difftree, $hash,
5094                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5095                 close $fd;
5096                 print "</div>\n"; # class="page_body"
5097                 git_footer_html();
5098
5099         } elsif ($format eq 'plain') {
5100                 local $/ = undef;
5101                 print <$fd>;
5102                 close $fd
5103                         or print "Reading git-diff-tree failed\n";
5104         }
5105 }
5106
5107 sub git_commitdiff_plain {
5108         git_commitdiff('plain');
5109 }
5110
5111 sub git_history {
5112         if (!defined $hash_base) {
5113                 $hash_base = git_get_head_hash($project);
5114         }
5115         if (!defined $page) {
5116                 $page = 0;
5117         }
5118         my $ftype;
5119         my %co = parse_commit($hash_base);
5120         if (!%co) {
5121                 die_error(undef, "Unknown commit object");
5122         }
5123
5124         my $refs = git_get_references();
5125         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5126
5127         if (!defined $hash && defined $file_name) {
5128                 $hash = git_get_hash_by_path($hash_base, $file_name);
5129         }
5130         if (defined $hash) {
5131                 $ftype = git_get_type($hash);
5132         }
5133
5134         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5135
5136         my $paging_nav = '';
5137         if ($page > 0) {
5138                 $paging_nav .=
5139                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5140                                                file_name=>$file_name)},
5141                                 "first");
5142                 $paging_nav .= " &sdot; " .
5143                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5144                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5145         } else {
5146                 $paging_nav .= "first";
5147                 $paging_nav .= " &sdot; prev";
5148         }
5149         my $next_link = '';
5150         if ($#commitlist >= 100) {
5151                 $next_link =
5152                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5153                                  -accesskey => "n", -title => "Alt-n"}, "next");
5154                 $paging_nav .= " &sdot; $next_link";
5155         } else {
5156                 $paging_nav .= " &sdot; next";
5157         }
5158
5159         git_header_html();
5160         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5161         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5162         git_print_page_path($file_name, $ftype, $hash_base);
5163
5164         git_history_body(\@commitlist, 0, 99,
5165                          $refs, $hash_base, $ftype, $next_link);
5166
5167         git_footer_html();
5168 }
5169
5170 sub git_search {
5171         my ($have_search) = gitweb_check_feature('search');
5172         if (!$have_search) {
5173                 die_error('403 Permission denied', "Permission denied");
5174         }
5175         if (!defined $searchtext) {
5176                 die_error(undef, "Text field empty");
5177         }
5178         if (!defined $hash) {
5179                 $hash = git_get_head_hash($project);
5180         }
5181         my %co = parse_commit($hash);
5182         if (!%co) {
5183                 die_error(undef, "Unknown commit object");
5184         }
5185         if (!defined $page) {
5186                 $page = 0;
5187         }
5188
5189         $searchtype ||= 'commit';
5190         if ($searchtype eq 'pickaxe') {
5191                 # pickaxe may take all resources of your box and run for several minutes
5192                 # with every query - so decide by yourself how public you make this feature
5193                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5194                 if (!$have_pickaxe) {
5195                         die_error('403 Permission denied', "Permission denied");
5196                 }
5197         }
5198         if ($searchtype eq 'grep') {
5199                 my ($have_grep) = gitweb_check_feature('grep');
5200                 if (!$have_grep) {
5201                         die_error('403 Permission denied', "Permission denied");
5202                 }
5203         }
5204
5205         git_header_html();
5206
5207         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5208                 my $greptype;
5209                 if ($searchtype eq 'commit') {
5210                         $greptype = "--grep=";
5211                 } elsif ($searchtype eq 'author') {
5212                         $greptype = "--author=";
5213                 } elsif ($searchtype eq 'committer') {
5214                         $greptype = "--committer=";
5215                 }
5216                 $greptype .= $search_regexp;
5217                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5218
5219                 my $paging_nav = '';
5220                 if ($page > 0) {
5221                         $paging_nav .=
5222                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5223                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5224                                         "first");
5225                         $paging_nav .= " &sdot; " .
5226                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5227                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5228                 } else {
5229                         $paging_nav .= "first";
5230                         $paging_nav .= " &sdot; prev";
5231                 }
5232                 my $next_link = '';
5233                 if ($#commitlist >= 100) {
5234                         $next_link =
5235                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5236                                          -accesskey => "n", -title => "Alt-n"}, "next");
5237                         $paging_nav .= " &sdot; $next_link";
5238                 } else {
5239                         $paging_nav .= " &sdot; next";
5240                 }
5241
5242                 if ($#commitlist >= 100) {
5243                 }
5244
5245                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5246                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5247                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5248         }
5249
5250         if ($searchtype eq 'pickaxe') {
5251                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5252                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5253
5254                 print "<table class=\"pickaxe search\">\n";
5255                 my $alternate = 1;
5256                 $/ = "\n";
5257                 my $git_command = git_cmd_str();
5258                 my $searchqtext = $searchtext;
5259                 $searchqtext =~ s/'/'\\''/;
5260                 open my $fd, "-|", "$git_command rev-list $hash | " .
5261                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5262                 undef %co;
5263                 my @files;
5264                 while (my $line = <$fd>) {
5265                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5266                                 my %set;
5267                                 $set{'file'} = $6;
5268                                 $set{'from_id'} = $3;
5269                                 $set{'to_id'} = $4;
5270                                 $set{'id'} = $set{'to_id'};
5271                                 if ($set{'id'} =~ m/0{40}/) {
5272                                         $set{'id'} = $set{'from_id'};
5273                                 }
5274                                 if ($set{'id'} =~ m/0{40}/) {
5275                                         next;
5276                                 }
5277                                 push @files, \%set;
5278                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5279                                 if (%co) {
5280                                         if ($alternate) {
5281                                                 print "<tr class=\"dark\">\n";
5282                                         } else {
5283                                                 print "<tr class=\"light\">\n";
5284                                         }
5285                                         $alternate ^= 1;
5286                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5287                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5288                                               "<td><i>" . $author . "</i></td>\n" .
5289                                               "<td>" .
5290                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5291                                                       -class => "list subject"},
5292                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5293                                         while (my $setref = shift @files) {
5294                                                 my %set = %$setref;
5295                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5296                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5297                                                               -class => "list"},
5298                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5299                                                       "<br/>\n";
5300                                         }
5301                                         print "</td>\n" .
5302                                               "<td class=\"link\">" .
5303                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5304                                               " | " .
5305                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5306                                         print "</td>\n" .
5307                                               "</tr>\n";
5308                                 }
5309                                 %co = parse_commit($1);
5310                         }
5311                 }
5312                 close $fd;
5313
5314                 print "</table>\n";
5315         }
5316
5317         if ($searchtype eq 'grep') {
5318                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5319                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5320
5321                 print "<table class=\"grep_search\">\n";
5322                 my $alternate = 1;
5323                 my $matches = 0;
5324                 $/ = "\n";
5325                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5326                 my $lastfile = '';
5327                 while (my $line = <$fd>) {
5328                         chomp $line;
5329                         my ($file, $lno, $ltext, $binary);
5330                         last if ($matches++ > 1000);
5331                         if ($line =~ /^Binary file (.+) matches$/) {
5332                                 $file = $1;
5333                                 $binary = 1;
5334                         } else {
5335                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5336                         }
5337                         if ($file ne $lastfile) {
5338                                 $lastfile and print "</td></tr>\n";
5339                                 if ($alternate++) {
5340                                         print "<tr class=\"dark\">\n";
5341                                 } else {
5342                                         print "<tr class=\"light\">\n";
5343                                 }
5344                                 print "<td class=\"list\">".
5345                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5346                                                                file_name=>"$file"),
5347                                                 -class => "list"}, esc_path($file));
5348                                 print "</td><td>\n";
5349                                 $lastfile = $file;
5350                         }
5351                         if ($binary) {
5352                                 print "<div class=\"binary\">Binary file</div>\n";
5353                         } else {
5354                                 $ltext = untabify($ltext);
5355                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5356                                         $ltext = esc_html($1, -nbsp=>1);
5357                                         $ltext .= '<span class="match">';
5358                                         $ltext .= esc_html($2, -nbsp=>1);
5359                                         $ltext .= '</span>';
5360                                         $ltext .= esc_html($3, -nbsp=>1);
5361                                 } else {
5362                                         $ltext = esc_html($ltext, -nbsp=>1);
5363                                 }
5364                                 print "<div class=\"pre\">" .
5365                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5366                                                                file_name=>"$file").'#l'.$lno,
5367                                                 -class => "linenr"}, sprintf('%4i', $lno))
5368                                         . ' ' .  $ltext . "</div>\n";
5369                         }
5370                 }
5371                 if ($lastfile) {
5372                         print "</td></tr>\n";
5373                         if ($matches > 1000) {
5374                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5375                         }
5376                 } else {
5377                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5378                 }
5379                 close $fd;
5380
5381                 print "</table>\n";
5382         }
5383         git_footer_html();
5384 }
5385
5386 sub git_search_help {
5387         git_header_html();
5388         git_print_page_nav('','', $hash,$hash,$hash);
5389         print <<EOT;
5390 <dl>
5391 <dt><b>commit</b></dt>
5392 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5393 EOT
5394         my ($have_grep) = gitweb_check_feature('grep');
5395         if ($have_grep) {
5396                 print <<EOT;
5397 <dt><b>grep</b></dt>
5398 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5399     a different one) are searched for the given
5400 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5401 (POSIX extended) and the matches are listed. On large
5402 trees, this search can take a while and put some strain on the server, so please use it with
5403 some consideration.</dd>
5404 EOT
5405         }
5406         print <<EOT;
5407 <dt><b>author</b></dt>
5408 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5409 <dt><b>committer</b></dt>
5410 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5411 EOT
5412         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5413         if ($have_pickaxe) {
5414                 print <<EOT;
5415 <dt><b>pickaxe</b></dt>
5416 <dd>All commits that caused the string to appear or disappear from any file (changes that
5417 added, removed or "modified" the string) will be listed. This search can take a while and
5418 takes a lot of strain on the server, so please use it wisely.</dd>
5419 EOT
5420         }
5421         print "</dl>\n";
5422         git_footer_html();
5423 }
5424
5425 sub git_shortlog {
5426         my $head = git_get_head_hash($project);
5427         if (!defined $hash) {
5428                 $hash = $head;
5429         }
5430         if (!defined $page) {
5431                 $page = 0;
5432         }
5433         my $refs = git_get_references();
5434
5435         my @commitlist = parse_commits($hash, 101, (100 * $page));
5436
5437         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5438         my $next_link = '';
5439         if ($#commitlist >= 100) {
5440                 $next_link =
5441                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5442                                  -accesskey => "n", -title => "Alt-n"}, "next");
5443         }
5444
5445         git_header_html();
5446         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5447         git_print_header_div('summary', $project);
5448
5449         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5450
5451         git_footer_html();
5452 }
5453
5454 ## ......................................................................
5455 ## feeds (RSS, Atom; OPML)
5456
5457 sub git_feed {
5458         my $format = shift || 'atom';
5459         my ($have_blame) = gitweb_check_feature('blame');
5460
5461         # Atom: http://www.atomenabled.org/developers/syndication/
5462         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5463         if ($format ne 'rss' && $format ne 'atom') {
5464                 die_error(undef, "Unknown web feed format");
5465         }
5466
5467         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5468         my $head = $hash || 'HEAD';
5469         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5470
5471         my %latest_commit;
5472         my %latest_date;
5473         my $content_type = "application/$format+xml";
5474         if (defined $cgi->http('HTTP_ACCEPT') &&
5475                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5476                 # browser (feed reader) prefers text/xml
5477                 $content_type = 'text/xml';
5478         }
5479         if (defined($commitlist[0])) {
5480                 %latest_commit = %{$commitlist[0]};
5481                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5482                 print $cgi->header(
5483                         -type => $content_type,
5484                         -charset => 'utf-8',
5485                         -last_modified => $latest_date{'rfc2822'});
5486         } else {
5487                 print $cgi->header(
5488                         -type => $content_type,
5489                         -charset => 'utf-8');
5490         }
5491
5492         # Optimization: skip generating the body if client asks only
5493         # for Last-Modified date.
5494         return if ($cgi->request_method() eq 'HEAD');
5495
5496         # header variables
5497         my $title = "$site_name - $project/$action";
5498         my $feed_type = 'log';
5499         if (defined $hash) {
5500                 $title .= " - '$hash'";
5501                 $feed_type = 'branch log';
5502                 if (defined $file_name) {
5503                         $title .= " :: $file_name";
5504                         $feed_type = 'history';
5505                 }
5506         } elsif (defined $file_name) {
5507                 $title .= " - $file_name";
5508                 $feed_type = 'history';
5509         }
5510         $title .= " $feed_type";
5511         my $descr = git_get_project_description($project);
5512         if (defined $descr) {
5513                 $descr = esc_html($descr);
5514         } else {
5515                 $descr = "$project " .
5516                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5517                          " feed";
5518         }
5519         my $owner = git_get_project_owner($project);
5520         $owner = esc_html($owner);
5521
5522         #header
5523         my $alt_url;
5524         if (defined $file_name) {
5525                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5526         } elsif (defined $hash) {
5527                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5528         } else {
5529                 $alt_url = href(-full=>1, action=>"summary");
5530         }
5531         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5532         if ($format eq 'rss') {
5533                 print <<XML;
5534 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5535 <channel>
5536 XML
5537                 print "<title>$title</title>\n" .
5538                       "<link>$alt_url</link>\n" .
5539                       "<description>$descr</description>\n" .
5540                       "<language>en</language>\n";
5541         } elsif ($format eq 'atom') {
5542                 print <<XML;
5543 <feed xmlns="http://www.w3.org/2005/Atom">
5544 XML
5545                 print "<title>$title</title>\n" .
5546                       "<subtitle>$descr</subtitle>\n" .
5547                       '<link rel="alternate" type="text/html" href="' .
5548                       $alt_url . '" />' . "\n" .
5549                       '<link rel="self" type="' . $content_type . '" href="' .
5550                       $cgi->self_url() . '" />' . "\n" .
5551                       "<id>" . href(-full=>1) . "</id>\n" .
5552                       # use project owner for feed author
5553                       "<author><name>$owner</name></author>\n";
5554                 if (defined $favicon) {
5555                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5556                 }
5557                 if (defined $logo_url) {
5558                         # not twice as wide as tall: 72 x 27 pixels
5559                         print "<logo>" . esc_url($logo) . "</logo>\n";
5560                 }
5561                 if (! %latest_date) {
5562                         # dummy date to keep the feed valid until commits trickle in:
5563                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5564                 } else {
5565                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5566                 }
5567         }
5568
5569         # contents
5570         for (my $i = 0; $i <= $#commitlist; $i++) {
5571                 my %co = %{$commitlist[$i]};
5572                 my $commit = $co{'id'};
5573                 # we read 150, we always show 30 and the ones more recent than 48 hours
5574                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5575                         last;
5576                 }
5577                 my %cd = parse_date($co{'author_epoch'});
5578
5579                 # get list of changed files
5580                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5581                         $co{'parent'} || "--root",
5582                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5583                         or next;
5584                 my @difftree = map { chomp; $_ } <$fd>;
5585                 close $fd
5586                         or next;
5587
5588                 # print element (entry, item)
5589                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5590                 if ($format eq 'rss') {
5591                         print "<item>\n" .
5592                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5593                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5594                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5595                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5596                               "<link>$co_url</link>\n" .
5597                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5598                               "<content:encoded>" .
5599                               "<![CDATA[\n";
5600                 } elsif ($format eq 'atom') {
5601                         print "<entry>\n" .
5602                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5603                               "<updated>$cd{'iso-8601'}</updated>\n" .
5604                               "<author>\n" .
5605                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5606                         if ($co{'author_email'}) {
5607                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5608                         }
5609                         print "</author>\n" .
5610                               # use committer for contributor
5611                               "<contributor>\n" .
5612                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5613                         if ($co{'committer_email'}) {
5614                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5615                         }
5616                         print "</contributor>\n" .
5617                               "<published>$cd{'iso-8601'}</published>\n" .
5618                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5619                               "<id>$co_url</id>\n" .
5620                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5621                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5622                 }
5623                 my $comment = $co{'comment'};
5624                 print "<pre>\n";
5625                 foreach my $line (@$comment) {
5626                         $line = esc_html($line);
5627                         print "$line\n";
5628                 }
5629                 print "</pre><ul>\n";
5630                 foreach my $difftree_line (@difftree) {
5631                         my %difftree = parse_difftree_raw_line($difftree_line);
5632                         next if !$difftree{'from_id'};
5633
5634                         my $file = $difftree{'file'} || $difftree{'to_file'};
5635
5636                         print "<li>" .
5637                               "[" .
5638                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5639                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5640                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5641                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5642                                       -title => "diff"}, 'D');
5643                         if ($have_blame) {
5644                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5645                                                              file_name=>$file, hash_base=>$commit),
5646                                               -title => "blame"}, 'B');
5647                         }
5648                         # if this is not a feed of a file history
5649                         if (!defined $file_name || $file_name ne $file) {
5650                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5651                                                              file_name=>$file, hash=>$commit),
5652                                               -title => "history"}, 'H');
5653                         }
5654                         $file = esc_path($file);
5655                         print "] ".
5656                               "$file</li>\n";
5657                 }
5658                 if ($format eq 'rss') {
5659                         print "</ul>]]>\n" .
5660                               "</content:encoded>\n" .
5661                               "</item>\n";
5662                 } elsif ($format eq 'atom') {
5663                         print "</ul>\n</div>\n" .
5664                               "</content>\n" .
5665                               "</entry>\n";
5666                 }
5667         }
5668
5669         # end of feed
5670         if ($format eq 'rss') {
5671                 print "</channel>\n</rss>\n";
5672         }       elsif ($format eq 'atom') {
5673                 print "</feed>\n";
5674         }
5675 }
5676
5677 sub git_rss {
5678         git_feed('rss');
5679 }
5680
5681 sub git_atom {
5682         git_feed('atom');
5683 }
5684
5685 sub git_opml {
5686         my @list = git_get_projects_list();
5687
5688         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5689         print <<XML;
5690 <?xml version="1.0" encoding="utf-8"?>
5691 <opml version="1.0">
5692 <head>
5693   <title>$site_name OPML Export</title>
5694 </head>
5695 <body>
5696 <outline text="git RSS feeds">
5697 XML
5698
5699         foreach my $pr (@list) {
5700                 my %proj = %$pr;
5701                 my $head = git_get_head_hash($proj{'path'});
5702                 if (!defined $head) {
5703                         next;
5704                 }
5705                 $git_dir = "$projectroot/$proj{'path'}";
5706                 my %co = parse_commit($head);
5707                 if (!%co) {
5708                         next;
5709                 }
5710
5711                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5712                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5713                 my $html = "$my_url?p=$proj{'path'};a=summary";
5714                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5715         }
5716         print <<XML;
5717 </outline>
5718 </body>
5719 </opml>
5720 XML
5721 }