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 # target of the home link on top of all pages
  39 our $home_link = $my_uri || "/";
  40
  41 # string of the home link on top of all pages
  42 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  43
  44 # name of your site or organization to appear in page titles
  45 # replace this with something more descriptive for clearer bookmarks
  46 our $site_name = "++GITWEB_SITENAME++"
  47                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  48
  49 # filename of html text to include at top of each page
  50 our $site_header = "++GITWEB_SITE_HEADER++";
  51 # html text to include at home page
  52 our $home_text = "++GITWEB_HOMETEXT++";
  53 # filename of html text to include at bottom of each page
  54 our $site_footer = "++GITWEB_SITE_FOOTER++";
  55
  56 # URI of stylesheets
  57 our @stylesheets = ("++GITWEB_CSS++");
  58 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  59 our $stylesheet = undef;
  60 # URI of GIT logo (72x27 size)
  61 our $logo = "++GITWEB_LOGO++";
  62 # URI of GIT favicon, assumed to be image/png type
  63 our $favicon = "++GITWEB_FAVICON++";
  64
  65 # URI and label (title) of GIT logo link
  66 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  67 #our $logo_label = "git documentation";
  68 our $logo_url = "http://git.or.cz/";
  69 our $logo_label = "git homepage";
  70
  71 # source of projects list
  72 our $projects_list = "++GITWEB_LIST++";
  73
  74 # the width (in characters) of the projects list "Description" column
  75 our $projects_list_description_width = 25;
  76
  77 # default order of projects list
  78 # valid values are none, project, descr, owner, and age
  79 our $default_projects_order = "project";
  80
  81 # show repository only if this file exists
  82 # (only effective if this variable evaluates to true)
  83 our $export_ok = "++GITWEB_EXPORT_OK++";
  84
  85 # only allow viewing of repositories also shown on the overview page
  86 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  87
  88 # list of git base URLs used for URL to where fetch project from,
  89 # i.e. full URL is "$git_base_url/$project"
  90 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  91
  92 # default blob_plain mimetype and default charset for text/plain blob
  93 our $default_blob_plain_mimetype = 'text/plain';
  94 our $default_text_plain_charset  = undef;
  95
  96 # file to use for guessing MIME types before trying /etc/mime.types
  97 # (relative to the current git repository)
  98 our $mimetypes_file = undef;
  99
 100 # assume this charset if line contains non-UTF-8 characters;
 101 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 102 # for which encoding all byte sequences are valid, for example
 103 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 104 # could be even 'utf-8' for the old behavior)
 105 our $fallback_encoding = 'latin1';
 106
 107 # rename detection options for git-diff and git-diff-tree
 108 # - default is '-M', with the cost proportional to
 109 #   (number of removed files) * (number of new files).
 110 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 111 #   (number of changed files + number of removed files) * (number of new files)
 112 # - even more costly is '-C', '--find-copies-harder' with cost
 113 #   (number of files in the original tree) * (number of new files)
 114 # - one might want to include '-B' option, e.g. '-B', '-M'
 115 our @diff_opts = ('-M'); # taken from git_commit
 116
 117 # information about snapshot formats that gitweb is capable of serving
 118 our %known_snapshot_formats = (
 119         # name => {
 120         #       'display' => display name,
 121         #       'type' => mime type,
 122         #       'suffix' => filename suffix,
 123         #       'format' => --format for git-archive,
 124         #       'compressor' => [compressor command and arguments]
 125         #                       (array reference, optional)}
 126         #
 127         'tgz' => {
 128                 'display' => 'tar.gz',
 129                 'type' => 'application/x-gzip',
 130                 'suffix' => '.tar.gz',
 131                 'format' => 'tar',
 132                 'compressor' => ['gzip']},
 133
 134         'tbz2' => {
 135                 'display' => 'tar.bz2',
 136                 'type' => 'application/x-bzip2',
 137                 'suffix' => '.tar.bz2',
 138                 'format' => 'tar',
 139                 'compressor' => ['bzip2']},
 140
 141         'zip' => {
 142                 'display' => 'zip',
 143                 'type' => 'application/x-zip',
 144                 'suffix' => '.zip',
 145                 'format' => 'zip'},
 146 );
 147
 148 # Aliases so we understand old gitweb.snapshot values in repository
 149 # configuration.
 150 our %known_snapshot_format_aliases = (
 151         'gzip'  => 'tgz',
 152         'bzip2' => 'tbz2',
 153
 154         # backward compatibility: legacy gitweb config support
 155         'x-gzip' => undef, 'gz' => undef,
 156         'x-bzip2' => undef, 'bz2' => undef,
 157         'x-zip' => undef, '' => undef,
 158 );
 159
 160 # You define site-wide feature defaults here; override them with
 161 # $GITWEB_CONFIG as necessary.
 162 our %feature = (
 163         # feature => {
 164         #       'sub' => feature-sub (subroutine),
 165         #       'override' => allow-override (boolean),
 166         #       'default' => [ default options...] (array reference)}
 167         #
 168         # if feature is overridable (it means that allow-override has true value),
 169         # then feature-sub will be called with default options as parameters;
 170         # return value of feature-sub indicates if to enable specified feature
 171         #
 172         # if there is no 'sub' key (no feature-sub), then feature cannot be
 173         # overriden
 174         #
 175         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 176
 177         # Enable the 'blame' blob view, showing the last commit that modified
 178         # each line in the file. This can be very CPU-intensive.
 179
 180         # To enable system wide have in $GITWEB_CONFIG
 181         # $feature{'blame'}{'default'} = [1];
 182         # To have project specific config enable override in $GITWEB_CONFIG
 183         # $feature{'blame'}{'override'} = 1;
 184         # and in project config gitweb.blame = 0|1;
 185         'blame' => {
 186                 'sub' => \&feature_blame,
 187                 'override' => 0,
 188                 'default' => [0]},
 189
 190         # Enable the 'snapshot' link, providing a compressed archive of any
 191         # tree. This can potentially generate high traffic if you have large
 192         # project.
 193
 194         # Value is a list of formats defined in %known_snapshot_formats that
 195         # you wish to offer.
 196         # To disable system wide have in $GITWEB_CONFIG
 197         # $feature{'snapshot'}{'default'} = [];
 198         # To have project specific config enable override in $GITWEB_CONFIG
 199         # $feature{'snapshot'}{'override'} = 1;
 200         # and in project config, a comma-separated list of formats or "none"
 201         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 202         'snapshot' => {
 203                 'sub' => \&feature_snapshot,
 204                 'override' => 0,
 205                 'default' => ['tgz']},
 206
 207         # Enable text search, which will list the commits which match author,
 208         # committer or commit text to a given string.  Enabled by default.
 209         # Project specific override is not supported.
 210         'search' => {
 211                 'override' => 0,
 212                 'default' => [1]},
 213
 214         # Enable grep search, which will list the files in currently selected
 215         # tree containing the given string. Enabled by default. This can be
 216         # potentially CPU-intensive, of course.
 217
 218         # To enable system wide have in $GITWEB_CONFIG
 219         # $feature{'grep'}{'default'} = [1];
 220         # To have project specific config enable override in $GITWEB_CONFIG
 221         # $feature{'grep'}{'override'} = 1;
 222         # and in project config gitweb.grep = 0|1;
 223         'grep' => {
 224                 'override' => 0,
 225                 'default' => [1]},
 226
 227         # Enable the pickaxe search, which will list the commits that modified
 228         # a given string in a file. This can be practical and quite faster
 229         # alternative to 'blame', but still potentially CPU-intensive.
 230
 231         # To enable system wide have in $GITWEB_CONFIG
 232         # $feature{'pickaxe'}{'default'} = [1];
 233         # To have project specific config enable override in $GITWEB_CONFIG
 234         # $feature{'pickaxe'}{'override'} = 1;
 235         # and in project config gitweb.pickaxe = 0|1;
 236         'pickaxe' => {
 237                 'sub' => \&feature_pickaxe,
 238                 'override' => 0,
 239                 'default' => [1]},
 240
 241         # Make gitweb use an alternative format of the URLs which can be
 242         # more readable and natural-looking: project name is embedded
 243         # directly in the path and the query string contains other
 244         # auxiliary information. All gitweb installations recognize
 245         # URL in either format; this configures in which formats gitweb
 246         # generates links.
 247
 248         # To enable system wide have in $GITWEB_CONFIG
 249         # $feature{'pathinfo'}{'default'} = [1];
 250         # Project specific override is not supported.
 251
 252         # Note that you will need to change the default location of CSS,
 253         # favicon, logo and possibly other files to an absolute URL. Also,
 254         # if gitweb.cgi serves as your indexfile, you will need to force
 255         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 256         'pathinfo' => {
 257                 'override' => 0,
 258                 'default' => [0]},
 259
 260         # Make gitweb consider projects in project root subdirectories
 261         # to be forks of existing projects. Given project $projname.git,
 262         # projects matching $projname/*.git will not be shown in the main
 263         # projects list, instead a '+' mark will be added to $projname
 264         # there and a 'forks' view will be enabled for the project, listing
 265         # all the forks. If project list is taken from a file, forks have
 266         # to be listed after the main project.
 267
 268         # To enable system wide have in $GITWEB_CONFIG
 269         # $feature{'forks'}{'default'} = [1];
 270         # Project specific override is not supported.
 271         'forks' => {
 272                 'override' => 0,
 273                 'default' => [0]},
 274 );
 275
 276 sub gitweb_check_feature {
 277         my ($name) = @_;
 278         return unless exists $feature{$name};
 279         my ($sub, $override, @defaults) = (
 280                 $feature{$name}{'sub'},
 281                 $feature{$name}{'override'},
 282                 @{$feature{$name}{'default'}});
 283         if (!$override) { return @defaults; }
 284         if (!defined $sub) {
 285                 warn "feature $name is not overrideable";
 286                 return @defaults;
 287         }
 288         return $sub->(@defaults);
 289 }
 290
 291 sub feature_blame {
 292         my ($val) = git_get_project_config('blame', '--bool');
 293
 294         if ($val eq 'true') {
 295                 return 1;
 296         } elsif ($val eq 'false') {
 297                 return 0;
 298         }
 299
 300         return $_[0];
 301 }
 302
 303 sub feature_snapshot {
 304         my (@fmts) = @_;
 305
 306         my ($val) = git_get_project_config('snapshot');
 307
 308         if ($val) {
 309                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 310                 @fmts = grep { defined } map {
 311                         exists $known_snapshot_format_aliases{$_} ?
 312                                 $known_snapshot_format_aliases{$_} : $_ } @fmts;
 313                 @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 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 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 360 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 361
 362 # version of the core git binary
 363 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 364
 365 $projects_list ||= $projectroot;
 366
 367 # ======================================================================
 368 # input validation and dispatch
 369 our $action = $cgi->param('a');
 370 if (defined $action) {
 371         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 372                 die_error(undef, "Invalid action parameter");
 373         }
 374 }
 375
 376 # parameters which are pathnames
 377 our $project = $cgi->param('p');
 378 if (defined $project) {
 379         if (!validate_pathname($project) ||
 380             !(-d "$projectroot/$project") ||
 381             !check_head_link("$projectroot/$project") ||
 382             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 383             ($strict_export && !project_in_list($project))) {
 384                 undef $project;
 385                 die_error(undef, "No such project");
 386         }
 387 }
 388
 389 our $file_name = $cgi->param('f');
 390 if (defined $file_name) {
 391         if (!validate_pathname($file_name)) {
 392                 die_error(undef, "Invalid file parameter");
 393         }
 394 }
 395
 396 our $file_parent = $cgi->param('fp');
 397 if (defined $file_parent) {
 398         if (!validate_pathname($file_parent)) {
 399                 die_error(undef, "Invalid file parent parameter");
 400         }
 401 }
 402
 403 # parameters which are refnames
 404 our $hash = $cgi->param('h');
 405 if (defined $hash) {
 406         if (!validate_refname($hash)) {
 407                 die_error(undef, "Invalid hash parameter");
 408         }
 409 }
 410
 411 our $hash_parent = $cgi->param('hp');
 412 if (defined $hash_parent) {
 413         if (!validate_refname($hash_parent)) {
 414                 die_error(undef, "Invalid hash parent parameter");
 415         }
 416 }
 417
 418 our $hash_base = $cgi->param('hb');
 419 if (defined $hash_base) {
 420         if (!validate_refname($hash_base)) {
 421                 die_error(undef, "Invalid hash base parameter");
 422         }
 423 }
 424
 425 my %allowed_options = (
 426         "--no-merges" => [ qw(rss atom log shortlog history) ],
 427 );
 428
 429 our @extra_options = $cgi->param('opt');
 430 if (defined @extra_options) {
 431         foreach(@extra_options)
 432         {
 433                 if (not grep(/^$_$/, keys %allowed_options)) {
 434                         die_error(undef, "Invalid option parameter");
 435                 }
 436                 if (not grep(/^$action$/, @{$allowed_options{$_}})) {
 437                         die_error(undef, "Invalid option parameter for this action");
 438                 }
 439         }
 440 }
 441
 442 our $hash_parent_base = $cgi->param('hpb');
 443 if (defined $hash_parent_base) {
 444         if (!validate_refname($hash_parent_base)) {
 445                 die_error(undef, "Invalid hash parent base parameter");
 446         }
 447 }
 448
 449 # other parameters
 450 our $page = $cgi->param('pg');
 451 if (defined $page) {
 452         if ($page =~ m/[^0-9]/) {
 453                 die_error(undef, "Invalid page parameter");
 454         }
 455 }
 456
 457 our $searchtype = $cgi->param('st');
 458 if (defined $searchtype) {
 459         if ($searchtype =~ m/[^a-z]/) {
 460                 die_error(undef, "Invalid searchtype parameter");
 461         }
 462 }
 463
 464 our $searchtext = $cgi->param('s');
 465 our $search_regexp;
 466 if (defined $searchtext) {
 467         if ($searchtype ne 'grep' and $searchtype ne 'pickaxe' and $searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 468                 die_error(undef, "Invalid search parameter");
 469         }
 470         if (length($searchtext) < 2) {
 471                 die_error(undef, "At least two characters are required for search parameter");
 472         }
 473         $search_regexp = quotemeta $searchtext;
 474 }
 475
 476 # now read PATH_INFO and use it as alternative to parameters
 477 sub evaluate_path_info {
 478         return if defined $project;
 479         my $path_info = $ENV{"PATH_INFO"};
 480         return if !$path_info;
 481         $path_info =~ s,^/+,,;
 482         return if !$path_info;
 483         # find which part of PATH_INFO is project
 484         $project = $path_info;
 485         $project =~ s,/+$,,;
 486         while ($project && !check_head_link("$projectroot/$project")) {
 487                 $project =~ s,/*[^/]*$,,;
 488         }
 489         # validate project
 490         $project = validate_pathname($project);
 491         if (!$project ||
 492             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 493             ($strict_export && !project_in_list($project))) {
 494                 undef $project;
 495                 return;
 496         }
 497         # do not change any parameters if an action is given using the query string
 498         return if $action;
 499         $path_info =~ s,^$project/*,,;
 500         my ($refname, $pathname) = split(/:/, $path_info, 2);
 501         if (defined $pathname) {
 502                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 503                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 504                 $pathname =~ s,^/+,,;
 505                 if (!$pathname || substr($pathname, -1) eq "/") {
 506                         $action  ||= "tree";
 507                         $pathname =~ s,/$,,;
 508                 } else {
 509                         $action  ||= "blob_plain";
 510                 }
 511                 $hash_base ||= validate_refname($refname);
 512                 $file_name ||= validate_pathname($pathname);
 513         } elsif (defined $refname) {
 514                 # we got "project.git/branch"
 515                 $action ||= "shortlog";
 516                 $hash   ||= validate_refname($refname);
 517         }
 518 }
 519 evaluate_path_info();
 520
 521 # path to the current git repository
 522 our $git_dir;
 523 $git_dir = "$projectroot/$project" if $project;
 524
 525 # dispatch
 526 my %actions = (
 527         "blame" => \&git_blame2,
 528         "blobdiff" => \&git_blobdiff,
 529         "blobdiff_plain" => \&git_blobdiff_plain,
 530         "blob" => \&git_blob,
 531         "blob_plain" => \&git_blob_plain,
 532         "commitdiff" => \&git_commitdiff,
 533         "commitdiff_plain" => \&git_commitdiff_plain,
 534         "commit" => \&git_commit,
 535         "forks" => \&git_forks,
 536         "heads" => \&git_heads,
 537         "history" => \&git_history,
 538         "log" => \&git_log,
 539         "rss" => \&git_rss,
 540         "atom" => \&git_atom,
 541         "search" => \&git_search,
 542         "search_help" => \&git_search_help,
 543         "shortlog" => \&git_shortlog,
 544         "summary" => \&git_summary,
 545         "tag" => \&git_tag,
 546         "tags" => \&git_tags,
 547         "tree" => \&git_tree,
 548         "snapshot" => \&git_snapshot,
 549         "object" => \&git_object,
 550         # those below don't need $project
 551         "opml" => \&git_opml,
 552         "project_list" => \&git_project_list,
 553         "project_index" => \&git_project_index,
 554 );
 555
 556 if (!defined $action) {
 557         if (defined $hash) {
 558                 $action = git_get_type($hash);
 559         } elsif (defined $hash_base && defined $file_name) {
 560                 $action = git_get_type("$hash_base:$file_name");
 561         } elsif (defined $project) {
 562                 $action = 'summary';
 563         } else {
 564                 $action = 'project_list';
 565         }
 566 }
 567 if (!defined($actions{$action})) {
 568         die_error(undef, "Unknown action");
 569 }
 570 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 571     !$project) {
 572         die_error(undef, "Project needed");
 573 }
 574 $actions{$action}->();
 575 exit;
 576
 577 ## ======================================================================
 578 ## action links
 579
 580 sub href(%) {
 581         my %params = @_;
 582         # default is to use -absolute url() i.e. $my_uri
 583         my $href = $params{-full} ? $my_url : $my_uri;
 584
 585         # XXX: Warning: If you touch this, check the search form for updating,
 586         # too.
 587
 588         my @mapping = (
 589                 project => "p",
 590                 action => "a",
 591                 file_name => "f",
 592                 file_parent => "fp",
 593                 extra_options => "opt",
 594                 hash => "h",
 595                 hash_parent => "hp",
 596                 hash_base => "hb",
 597                 hash_parent_base => "hpb",
 598                 page => "pg",
 599                 order => "o",
 600                 searchtext => "s",
 601                 searchtype => "st",
 602                 snapshot_format => "sf",
 603         );
 604         my %mapping = @mapping;
 605
 606         $params{'project'} = $project unless exists $params{'project'};
 607
 608         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 609         if ($use_pathinfo) {
 610                 # use PATH_INFO for project name
 611                 $href .= "/$params{'project'}" if defined $params{'project'};
 612                 delete $params{'project'};
 613
 614                 # Summary just uses the project path URL
 615                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 616                         delete $params{'action'};
 617                 }
 618         }
 619
 620         # now encode the parameters explicitly
 621         my @result = ();
 622         for (my $i = 0; $i < @mapping; $i += 2) {
 623                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 624                 if (defined $params{$name}) {
 625                         push @result, $symbol . "=" . esc_param($params{$name});
 626                 }
 627         }
 628         $href .= "?" . join(';', @result) if scalar @result;
 629
 630         return $href;
 631 }
 632
 633
 634 ## ======================================================================
 635 ## validation, quoting/unquoting and escaping
 636
 637 sub validate_pathname {
 638         my $input = shift || return undef;
 639
 640         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 641         # at the beginning, at the end, and between slashes.
 642         # also this catches doubled slashes
 643         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 644                 return undef;
 645         }
 646         # no null characters
 647         if ($input =~ m!\0!) {
 648                 return undef;
 649         }
 650         return $input;
 651 }
 652
 653 sub validate_refname {
 654         my $input = shift || return undef;
 655
 656         # textual hashes are O.K.
 657         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 658                 return $input;
 659         }
 660         # it must be correct pathname
 661         $input = validate_pathname($input)
 662                 or return undef;
 663         # restrictions on ref name according to git-check-ref-format
 664         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 665                 return undef;
 666         }
 667         return $input;
 668 }
 669
 670 # decode sequences of octets in utf8 into Perl's internal form,
 671 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 672 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 673 sub to_utf8 {
 674         my $str = shift;
 675         my $res;
 676         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 677         if (defined $res) {
 678                 return $res;
 679         } else {
 680                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 681         }
 682 }
 683
 684 # quote unsafe chars, but keep the slash, even when it's not
 685 # correct, but quoted slashes look too horrible in bookmarks
 686 sub esc_param {
 687         my $str = shift;
 688         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 689         $str =~ s/\+/%2B/g;
 690         $str =~ s/ /\+/g;
 691         return $str;
 692 }
 693
 694 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 695 sub esc_url {
 696         my $str = shift;
 697         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 698         $str =~ s/\+/%2B/g;
 699         $str =~ s/ /\+/g;
 700         return $str;
 701 }
 702
 703 # replace invalid utf8 character with SUBSTITUTION sequence
 704 sub esc_html ($;%) {
 705         my $str = shift;
 706         my %opts = @_;
 707
 708         $str = to_utf8($str);
 709         $str = $cgi->escapeHTML($str);
 710         if ($opts{'-nbsp'}) {
 711                 $str =~ s/ /&nbsp;/g;
 712         }
 713         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 714         return $str;
 715 }
 716
 717 # quote control characters and escape filename to HTML
 718 sub esc_path {
 719         my $str = shift;
 720         my %opts = @_;
 721
 722         $str = to_utf8($str);
 723         $str = $cgi->escapeHTML($str);
 724         if ($opts{'-nbsp'}) {
 725                 $str =~ s/ /&nbsp;/g;
 726         }
 727         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 728         return $str;
 729 }
 730
 731 # Make control characters "printable", using character escape codes (CEC)
 732 sub quot_cec {
 733         my $cntrl = shift;
 734         my %es = ( # character escape codes, aka escape sequences
 735                    "\t" => '\t',   # tab            (HT)
 736                    "\n" => '\n',   # line feed      (LF)
 737                    "\r" => '\r',   # carrige return (CR)
 738                    "\f" => '\f',   # form feed      (FF)
 739                    "\b" => '\b',   # backspace      (BS)
 740                    "\a" => '\a',   # alarm (bell)   (BEL)
 741                    "\e" => '\e',   # escape         (ESC)
 742                    "\013" => '\v', # vertical tab   (VT)
 743                    "\000" => '\0', # nul character  (NUL)
 744                    );
 745         my $chr = ( (exists $es{$cntrl})
 746                     ? $es{$cntrl}
 747                     : sprintf('\%03o', ord($cntrl)) );
 748         return "<span class=\"cntrl\">$chr</span>";
 749 }
 750
 751 # Alternatively use unicode control pictures codepoints,
 752 # Unicode "printable representation" (PR)
 753 sub quot_upr {
 754         my $cntrl = shift;
 755         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 756         return "<span class=\"cntrl\">$chr</span>";
 757 }
 758
 759 # git may return quoted and escaped filenames
 760 sub unquote {
 761         my $str = shift;
 762
 763         sub unq {
 764                 my $seq = shift;
 765                 my %es = ( # character escape codes, aka escape sequences
 766                         't' => "\t",   # tab            (HT, TAB)
 767                         'n' => "\n",   # newline        (NL)
 768                         'r' => "\r",   # return         (CR)
 769                         'f' => "\f",   # form feed      (FF)
 770                         'b' => "\b",   # backspace      (BS)
 771                         'a' => "\a",   # alarm (bell)   (BEL)
 772                         'e' => "\e",   # escape         (ESC)
 773                         'v' => "\013", # vertical tab   (VT)
 774                 );
 775
 776                 if ($seq =~ m/^[0-7]{1,3}$/) {
 777                         # octal char sequence
 778                         return chr(oct($seq));
 779                 } elsif (exists $es{$seq}) {
 780                         # C escape sequence, aka character escape code
 781                         return $es{$seq}
 782                 }
 783                 # quoted ordinary character
 784                 return $seq;
 785         }
 786
 787         if ($str =~ m/^"(.*)"$/) {
 788                 # needs unquoting
 789                 $str = $1;
 790                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 791         }
 792         return $str;
 793 }
 794
 795 # escape tabs (convert tabs to spaces)
 796 sub untabify {
 797         my $line = shift;
 798
 799         while ((my $pos = index($line, "\t")) != -1) {
 800                 if (my $count = (8 - ($pos % 8))) {
 801                         my $spaces = ' ' x $count;
 802                         $line =~ s/\t/$spaces/;
 803                 }
 804         }
 805
 806         return $line;
 807 }
 808
 809 sub project_in_list {
 810         my $project = shift;
 811         my @list = git_get_projects_list();
 812         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 813 }
 814
 815 ## ----------------------------------------------------------------------
 816 ## HTML aware string manipulation
 817
 818 sub chop_str {
 819         my $str = shift;
 820         my $len = shift;
 821         my $add_len = shift || 10;
 822
 823         # allow only $len chars, but don't cut a word if it would fit in $add_len
 824         # if it doesn't fit, cut it if it's still longer than the dots we would add
 825         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 826         my $body = $1;
 827         my $tail = $2;
 828         if (length($tail) > 4) {
 829                 $tail = " ...";
 830                 $body =~ s/&[^;]*$//; # remove chopped character entities
 831         }
 832         return "$body$tail";
 833 }
 834
 835 ## ----------------------------------------------------------------------
 836 ## functions returning short strings
 837
 838 # CSS class for given age value (in seconds)
 839 sub age_class {
 840         my $age = shift;
 841
 842         if (!defined $age) {
 843                 return "noage";
 844         } elsif ($age < 60*60*2) {
 845                 return "age0";
 846         } elsif ($age < 60*60*24*2) {
 847                 return "age1";
 848         } else {
 849                 return "age2";
 850         }
 851 }
 852
 853 # convert age in seconds to "nn units ago" string
 854 sub age_string {
 855         my $age = shift;
 856         my $age_str;
 857
 858         if ($age > 60*60*24*365*2) {
 859                 $age_str = (int $age/60/60/24/365);
 860                 $age_str .= " years ago";
 861         } elsif ($age > 60*60*24*(365/12)*2) {
 862                 $age_str = int $age/60/60/24/(365/12);
 863                 $age_str .= " months ago";
 864         } elsif ($age > 60*60*24*7*2) {
 865                 $age_str = int $age/60/60/24/7;
 866                 $age_str .= " weeks ago";
 867         } elsif ($age > 60*60*24*2) {
 868                 $age_str = int $age/60/60/24;
 869                 $age_str .= " days ago";
 870         } elsif ($age > 60*60*2) {
 871                 $age_str = int $age/60/60;
 872                 $age_str .= " hours ago";
 873         } elsif ($age > 60*2) {
 874                 $age_str = int $age/60;
 875                 $age_str .= " min ago";
 876         } elsif ($age > 2) {
 877                 $age_str = int $age;
 878                 $age_str .= " sec ago";
 879         } else {
 880                 $age_str .= " right now";
 881         }
 882         return $age_str;
 883 }
 884
 885 # convert file mode in octal to symbolic file mode string
 886 sub mode_str {
 887         my $mode = oct shift;
 888
 889         if (S_ISDIR($mode & S_IFMT)) {
 890                 return 'drwxr-xr-x';
 891         } elsif (S_ISLNK($mode)) {
 892                 return 'lrwxrwxrwx';
 893         } elsif (S_ISREG($mode)) {
 894                 # git cares only about the executable bit
 895                 if ($mode & S_IXUSR) {
 896                         return '-rwxr-xr-x';
 897                 } else {
 898                         return '-rw-r--r--';
 899                 };
 900         } else {
 901                 return '----------';
 902         }
 903 }
 904
 905 # convert file mode in octal to file type string
 906 sub file_type {
 907         my $mode = shift;
 908
 909         if ($mode !~ m/^[0-7]+$/) {
 910                 return $mode;
 911         } else {
 912                 $mode = oct $mode;
 913         }
 914
 915         if (S_ISDIR($mode & S_IFMT)) {
 916                 return "directory";
 917         } elsif (S_ISLNK($mode)) {
 918                 return "symlink";
 919         } elsif (S_ISREG($mode)) {
 920                 return "file";
 921         } else {
 922                 return "unknown";
 923         }
 924 }
 925
 926 # convert file mode in octal to file type description string
 927 sub file_type_long {
 928         my $mode = shift;
 929
 930         if ($mode !~ m/^[0-7]+$/) {
 931                 return $mode;
 932         } else {
 933                 $mode = oct $mode;
 934         }
 935
 936         if (S_ISDIR($mode & S_IFMT)) {
 937                 return "directory";
 938         } elsif (S_ISLNK($mode)) {
 939                 return "symlink";
 940         } elsif (S_ISREG($mode)) {
 941                 if ($mode & S_IXUSR) {
 942                         return "executable";
 943                 } else {
 944                         return "file";
 945                 };
 946         } else {
 947                 return "unknown";
 948         }
 949 }
 950
 951
 952 ## ----------------------------------------------------------------------
 953 ## functions returning short HTML fragments, or transforming HTML fragments
 954 ## which don't belong to other sections
 955
 956 # format line of commit message.
 957 sub format_log_line_html {
 958         my $line = shift;
 959
 960         $line = esc_html($line, -nbsp=>1);
 961         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 962                 my $hash_text = $1;
 963                 my $link =
 964                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 965                                 -class => "text"}, $hash_text);
 966                 $line =~ s/$hash_text/$link/;
 967         }
 968         return $line;
 969 }
 970
 971 # format marker of refs pointing to given object
 972 sub format_ref_marker {
 973         my ($refs, $id) = @_;
 974         my $markers = '';
 975
 976         if (defined $refs->{$id}) {
 977                 foreach my $ref (@{$refs->{$id}}) {
 978                         my ($type, $name) = qw();
 979                         # e.g. tags/v2.6.11 or heads/next
 980                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
 981                                 $type = $1;
 982                                 $name = $2;
 983                         } else {
 984                                 $type = "ref";
 985                                 $name = $ref;
 986                         }
 987
 988                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
 989                                     esc_html($name) . "</span>";
 990                 }
 991         }
 992
 993         if ($markers) {
 994                 return ' <span class="refs">'. $markers . '</span>';
 995         } else {
 996                 return "";
 997         }
 998 }
 999
1000 # format, perhaps shortened and with markers, title line
1001 sub format_subject_html {
1002         my ($long, $short, $href, $extra) = @_;
1003         $extra = '' unless defined($extra);
1004
1005         if (length($short) < length($long)) {
1006                 return $cgi->a({-href => $href, -class => "list subject",
1007                                 -title => to_utf8($long)},
1008                        esc_html($short) . $extra);
1009         } else {
1010                 return $cgi->a({-href => $href, -class => "list subject"},
1011                        esc_html($long)  . $extra);
1012         }
1013 }
1014
1015 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1016 sub format_git_diff_header_line {
1017         my $line = shift;
1018         my $diffinfo = shift;
1019         my ($from, $to) = @_;
1020
1021         if ($diffinfo->{'nparents'}) {
1022                 # combined diff
1023                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1024                 if ($to->{'href'}) {
1025                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1026                                          esc_path($to->{'file'}));
1027                 } else { # file was deleted (no href)
1028                         $line .= esc_path($to->{'file'});
1029                 }
1030         } else {
1031                 # "ordinary" diff
1032                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1033                 if ($from->{'href'}) {
1034                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1035                                          'a/' . esc_path($from->{'file'}));
1036                 } else { # file was added (no href)
1037                         $line .= 'a/' . esc_path($from->{'file'});
1038                 }
1039                 $line .= ' ';
1040                 if ($to->{'href'}) {
1041                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1042                                          'b/' . esc_path($to->{'file'}));
1043                 } else { # file was deleted
1044                         $line .= 'b/' . esc_path($to->{'file'});
1045                 }
1046         }
1047
1048         return "<div class=\"diff header\">$line</div>\n";
1049 }
1050
1051 # format extended diff header line, before patch itself
1052 sub format_extended_diff_header_line {
1053         my $line = shift;
1054         my $diffinfo = shift;
1055         my ($from, $to) = @_;
1056
1057         # match <path>
1058         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1059                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1060                                        esc_path($from->{'file'}));
1061         }
1062         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1063                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1064                                  esc_path($to->{'file'}));
1065         }
1066         # match single <mode>
1067         if ($line =~ m/\s(\d{6})$/) {
1068                 $line .= '<span class="info"> (' .
1069                          file_type_long($1) .
1070                          ')</span>';
1071         }
1072         # match <hash>
1073         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1074                 # can match only for combined diff
1075                 $line = 'index ';
1076                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1077                         if ($from->{'href'}[$i]) {
1078                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1079                                                   -class=>"hash"},
1080                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1081                         } else {
1082                                 $line .= '0' x 7;
1083                         }
1084                         # separator
1085                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1086                 }
1087                 $line .= '..';
1088                 if ($to->{'href'}) {
1089                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1090                                          substr($diffinfo->{'to_id'},0,7));
1091                 } else {
1092                         $line .= '0' x 7;
1093                 }
1094
1095         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1096                 # can match only for ordinary diff
1097                 my ($from_link, $to_link);
1098                 if ($from->{'href'}) {
1099                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1100                                              substr($diffinfo->{'from_id'},0,7));
1101                 } else {
1102                         $from_link = '0' x 7;
1103                 }
1104                 if ($to->{'href'}) {
1105                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1106                                            substr($diffinfo->{'to_id'},0,7));
1107                 } else {
1108                         $to_link = '0' x 7;
1109                 }
1110                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1111                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1112         }
1113
1114         return $line . "<br/>\n";
1115 }
1116
1117 # format from-file/to-file diff header
1118 sub format_diff_from_to_header {
1119         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1120         my $line;
1121         my $result = '';
1122
1123         $line = $from_line;
1124         #assert($line =~ m/^---/) if DEBUG;
1125         # no extra formatting for "^--- /dev/null"
1126         if (! $diffinfo->{'nparents'}) {
1127                 # ordinary (single parent) diff
1128                 if ($line =~ m!^--- "?a/!) {
1129                         if ($from->{'href'}) {
1130                                 $line = '--- a/' .
1131                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1132                                                 esc_path($from->{'file'}));
1133                         } else {
1134                                 $line = '--- a/' .
1135                                         esc_path($from->{'file'});
1136                         }
1137                 }
1138                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1139
1140         } else {
1141                 # combined diff (merge commit)
1142                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1143                         if ($from->{'href'}[$i]) {
1144                                 $line = '--- ' .
1145                                         $cgi->a({-href=>href(action=>"blobdiff",
1146                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1147                                                              hash_parent_base=>$parents[$i],
1148                                                              file_parent=>$from->{'file'}[$i],
1149                                                              hash=>$diffinfo->{'to_id'},
1150                                                              hash_base=>$hash,
1151                                                              file_name=>$to->{'file'}),
1152                                                  -class=>"path",
1153                                                  -title=>"diff" . ($i+1)},
1154                                                 $i+1) .
1155                                         '/' .
1156                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1157                                                 esc_path($from->{'file'}[$i]));
1158                         } else {
1159                                 $line = '--- /dev/null';
1160                         }
1161                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1162                 }
1163         }
1164
1165         $line = $to_line;
1166         #assert($line =~ m/^\+\+\+/) if DEBUG;
1167         # no extra formatting for "^+++ /dev/null"
1168         if ($line =~ m!^\+\+\+ "?b/!) {
1169                 if ($to->{'href'}) {
1170                         $line = '+++ b/' .
1171                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1172                                         esc_path($to->{'file'}));
1173                 } else {
1174                         $line = '+++ b/' .
1175                                 esc_path($to->{'file'});
1176                 }
1177         }
1178         $result .= qq!<div class="diff to_file">$line</div>\n!;
1179
1180         return $result;
1181 }
1182
1183 # create note for patch simplified by combined diff
1184 sub format_diff_cc_simplified {
1185         my ($diffinfo, @parents) = @_;
1186         my $result = '';
1187
1188         $result .= "<div class=\"diff header\">" .
1189                    "diff --cc ";
1190         if (!is_deleted($diffinfo)) {
1191                 $result .= $cgi->a({-href => href(action=>"blob",
1192                                                   hash_base=>$hash,
1193                                                   hash=>$diffinfo->{'to_id'},
1194                                                   file_name=>$diffinfo->{'to_file'}),
1195                                     -class => "path"},
1196                                    esc_path($diffinfo->{'to_file'}));
1197         } else {
1198                 $result .= esc_path($diffinfo->{'to_file'});
1199         }
1200         $result .= "</div>\n" . # class="diff header"
1201                    "<div class=\"diff nodifferences\">" .
1202                    "Simple merge" .
1203                    "</div>\n"; # class="diff nodifferences"
1204
1205         return $result;
1206 }
1207
1208 # format patch (diff) line (not to be used for diff headers)
1209 sub format_diff_line {
1210         my $line = shift;
1211         my ($from, $to) = @_;
1212         my $diff_class = "";
1213
1214         chomp $line;
1215
1216         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1217                 # combined diff
1218                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1219                 if ($line =~ m/^\@{3}/) {
1220                         $diff_class = " chunk_header";
1221                 } elsif ($line =~ m/^\\/) {
1222                         $diff_class = " incomplete";
1223                 } elsif ($prefix =~ tr/+/+/) {
1224                         $diff_class = " add";
1225                 } elsif ($prefix =~ tr/-/-/) {
1226                         $diff_class = " rem";
1227                 }
1228         } else {
1229                 # assume ordinary diff
1230                 my $char = substr($line, 0, 1);
1231                 if ($char eq '+') {
1232                         $diff_class = " add";
1233                 } elsif ($char eq '-') {
1234                         $diff_class = " rem";
1235                 } elsif ($char eq '@') {
1236                         $diff_class = " chunk_header";
1237                 } elsif ($char eq "\\") {
1238                         $diff_class = " incomplete";
1239                 }
1240         }
1241         $line = untabify($line);
1242         if ($from && $to && $line =~ m/^\@{2} /) {
1243                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1244                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1245
1246                 $from_lines = 0 unless defined $from_lines;
1247                 $to_lines   = 0 unless defined $to_lines;
1248
1249                 if ($from->{'href'}) {
1250                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1251                                              -class=>"list"}, $from_text);
1252                 }
1253                 if ($to->{'href'}) {
1254                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1255                                              -class=>"list"}, $to_text);
1256                 }
1257                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1258                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1259                 return "<div class=\"diff$diff_class\">$line</div>\n";
1260         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1261                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1262                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1263
1264                 @from_text = split(' ', $ranges);
1265                 for (my $i = 0; $i < @from_text; ++$i) {
1266                         ($from_start[$i], $from_nlines[$i]) =
1267                                 (split(',', substr($from_text[$i], 1)), 0);
1268                 }
1269
1270                 $to_text   = pop @from_text;
1271                 $to_start  = pop @from_start;
1272                 $to_nlines = pop @from_nlines;
1273
1274                 $line = "<span class=\"chunk_info\">$prefix ";
1275                 for (my $i = 0; $i < @from_text; ++$i) {
1276                         if ($from->{'href'}[$i]) {
1277                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1278                                                   -class=>"list"}, $from_text[$i]);
1279                         } else {
1280                                 $line .= $from_text[$i];
1281                         }
1282                         $line .= " ";
1283                 }
1284                 if ($to->{'href'}) {
1285                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1286                                           -class=>"list"}, $to_text);
1287                 } else {
1288                         $line .= $to_text;
1289                 }
1290                 $line .= " $prefix</span>" .
1291                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1292                 return "<div class=\"diff$diff_class\">$line</div>\n";
1293         }
1294         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1295 }
1296
1297 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1298 # linked.  Pass the hash of the tree/commit to snapshot.
1299 sub format_snapshot_links {
1300         my ($hash) = @_;
1301         my @snapshot_fmts = gitweb_check_feature('snapshot');
1302         my $num_fmts = @snapshot_fmts;
1303         if ($num_fmts > 1) {
1304                 # A parenthesized list of links bearing format names.
1305                 return "snapshot (" . join(' ', map
1306                         $cgi->a({
1307                                 -href => href(
1308                                         action=>"snapshot",
1309                                         hash=>$hash,
1310                                         snapshot_format=>$_
1311                                 )
1312                         }, $known_snapshot_formats{$_}{'display'})
1313                 , @snapshot_fmts) . ")";
1314         } elsif ($num_fmts == 1) {
1315                 # A single "snapshot" link whose tooltip bears the format name.
1316                 my ($fmt) = @snapshot_fmts;
1317                 return $cgi->a({
1318                                 -href => href(
1319                                         action=>"snapshot",
1320                                         hash=>$hash,
1321                                         snapshot_format=>$fmt
1322                                 ),
1323                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1324                         }, "snapshot");
1325         } else { # $num_fmts == 0
1326                 return undef;
1327         }
1328 }
1329
1330 ## ----------------------------------------------------------------------
1331 ## git utility subroutines, invoking git commands
1332
1333 # returns path to the core git executable and the --git-dir parameter as list
1334 sub git_cmd {
1335         return $GIT, '--git-dir='.$git_dir;
1336 }
1337
1338 # returns path to the core git executable and the --git-dir parameter as string
1339 sub git_cmd_str {
1340         return join(' ', git_cmd());
1341 }
1342
1343 # get HEAD ref of given project as hash
1344 sub git_get_head_hash {
1345         my $project = shift;
1346         my $o_git_dir = $git_dir;
1347         my $retval = undef;
1348         $git_dir = "$projectroot/$project";
1349         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1350                 my $head = <$fd>;
1351                 close $fd;
1352                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1353                         $retval = $1;
1354                 }
1355         }
1356         if (defined $o_git_dir) {
1357                 $git_dir = $o_git_dir;
1358         }
1359         return $retval;
1360 }
1361
1362 # get type of given object
1363 sub git_get_type {
1364         my $hash = shift;
1365
1366         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1367         my $type = <$fd>;
1368         close $fd or return;
1369         chomp $type;
1370         return $type;
1371 }
1372
1373 sub git_get_project_config {
1374         my ($key, $type) = @_;
1375
1376         return unless ($key);
1377         $key =~ s/^gitweb\.//;
1378         return if ($key =~ m/\W/);
1379
1380         my @x = (git_cmd(), 'config');
1381         if (defined $type) { push @x, $type; }
1382         push @x, "--get";
1383         push @x, "gitweb.$key";
1384         my $val = qx(@x);
1385         chomp $val;
1386         return ($val);
1387 }
1388
1389 # get hash of given path at given ref
1390 sub git_get_hash_by_path {
1391         my $base = shift;
1392         my $path = shift || return undef;
1393         my $type = shift;
1394
1395         $path =~ s,/+$,,;
1396
1397         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1398                 or die_error(undef, "Open git-ls-tree failed");
1399         my $line = <$fd>;
1400         close $fd or return undef;
1401
1402         if (!defined $line) {
1403                 # there is no tree or hash given by $path at $base
1404                 return undef;
1405         }
1406
1407         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1408         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1409         if (defined $type && $type ne $2) {
1410                 # type doesn't match
1411                 return undef;
1412         }
1413         return $3;
1414 }
1415
1416 # get path of entry with given hash at given tree-ish (ref)
1417 # used to get 'from' filename for combined diff (merge commit) for renames
1418 sub git_get_path_by_hash {
1419         my $base = shift || return;
1420         my $hash = shift || return;
1421
1422         local $/ = "\0";
1423
1424         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1425                 or return undef;
1426         while (my $line = <$fd>) {
1427                 chomp $line;
1428
1429                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1430                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1431                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1432                         close $fd;
1433                         return $1;
1434                 }
1435         }
1436         close $fd;
1437         return undef;
1438 }
1439
1440 ## ......................................................................
1441 ## git utility functions, directly accessing git repository
1442
1443 sub git_get_project_description {
1444         my $path = shift;
1445
1446         open my $fd, "$projectroot/$path/description" or return undef;
1447         my $descr = <$fd>;
1448         close $fd;
1449         if (defined $descr) {
1450                 chomp $descr;
1451         }
1452         return $descr;
1453 }
1454
1455 sub git_get_project_url_list {
1456         my $path = shift;
1457
1458         open my $fd, "$projectroot/$path/cloneurl" or return;
1459         my @git_project_url_list = map { chomp; $_ } <$fd>;
1460         close $fd;
1461
1462         return wantarray ? @git_project_url_list : \@git_project_url_list;
1463 }
1464
1465 sub git_get_projects_list {
1466         my ($filter) = @_;
1467         my @list;
1468
1469         $filter ||= '';
1470         $filter =~ s/\.git$//;
1471
1472         my ($check_forks) = gitweb_check_feature('forks');
1473
1474         if (-d $projects_list) {
1475                 # search in directory
1476                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1477                 # remove the trailing "/"
1478                 $dir =~ s!/+$!!;
1479                 my $pfxlen = length("$dir");
1480
1481                 File::Find::find({
1482                         follow_fast => 1, # follow symbolic links
1483                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1484                         wanted => sub {
1485                                 # skip project-list toplevel, if we get it.
1486                                 return if (m!^[/.]$!);
1487                                 # only directories can be git repositories
1488                                 return unless (-d $_);
1489
1490                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1491                                 # we check related file in $projectroot
1492                                 if ($check_forks and $subdir =~ m#/.#) {
1493                                         $File::Find::prune = 1;
1494                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1495                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1496                                         $File::Find::prune = 1;
1497                                 }
1498                         },
1499                 }, "$dir");
1500
1501         } elsif (-f $projects_list) {
1502                 # read from file(url-encoded):
1503                 # 'git%2Fgit.git Linus+Torvalds'
1504                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1505                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1506                 my %paths;
1507                 open my ($fd), $projects_list or return;
1508         PROJECT:
1509                 while (my $line = <$fd>) {
1510                         chomp $line;
1511                         my ($path, $owner) = split ' ', $line;
1512                         $path = unescape($path);
1513                         $owner = unescape($owner);
1514                         if (!defined $path) {
1515                                 next;
1516                         }
1517                         if ($filter ne '') {
1518                                 # looking for forks;
1519                                 my $pfx = substr($path, 0, length($filter));
1520                                 if ($pfx ne $filter) {
1521                                         next PROJECT;
1522                                 }
1523                                 my $sfx = substr($path, length($filter));
1524                                 if ($sfx !~ /^\/.*\.git$/) {
1525                                         next PROJECT;
1526                                 }
1527                         } elsif ($check_forks) {
1528                         PATH:
1529                                 foreach my $filter (keys %paths) {
1530                                         # looking for forks;
1531                                         my $pfx = substr($path, 0, length($filter));
1532                                         if ($pfx ne $filter) {
1533                                                 next PATH;
1534                                         }
1535                                         my $sfx = substr($path, length($filter));
1536                                         if ($sfx !~ /^\/.*\.git$/) {
1537                                                 next PATH;
1538                                         }
1539                                         # is a fork, don't include it in
1540                                         # the list
1541                                         next PROJECT;
1542                                 }
1543                         }
1544                         if (check_export_ok("$projectroot/$path")) {
1545                                 my $pr = {
1546                                         path => $path,
1547                                         owner => to_utf8($owner),
1548                                 };
1549                                 push @list, $pr;
1550                                 (my $forks_path = $path) =~ s/\.git$//;
1551                                 $paths{$forks_path}++;
1552                         }
1553                 }
1554                 close $fd;
1555         }
1556         return @list;
1557 }
1558
1559 our $gitweb_project_owner = undef;
1560 sub git_get_project_list_from_file {
1561
1562         return if (defined $gitweb_project_owner);
1563
1564         $gitweb_project_owner = {};
1565         # read from file (url-encoded):
1566         # 'git%2Fgit.git Linus+Torvalds'
1567         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1568         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1569         if (-f $projects_list) {
1570                 open (my $fd , $projects_list);
1571                 while (my $line = <$fd>) {
1572                         chomp $line;
1573                         my ($pr, $ow) = split ' ', $line;
1574                         $pr = unescape($pr);
1575                         $ow = unescape($ow);
1576                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1577                 }
1578                 close $fd;
1579         }
1580 }
1581
1582 sub git_get_project_owner {
1583         my $project = shift;
1584         my $owner;
1585
1586         return undef unless $project;
1587
1588         if (!defined $gitweb_project_owner) {
1589                 git_get_project_list_from_file();
1590         }
1591
1592         if (exists $gitweb_project_owner->{$project}) {
1593                 $owner = $gitweb_project_owner->{$project};
1594         }
1595         if (!defined $owner) {
1596                 $owner = get_file_owner("$projectroot/$project");
1597         }
1598
1599         return $owner;
1600 }
1601
1602 sub git_get_last_activity {
1603         my ($path) = @_;
1604         my $fd;
1605
1606         $git_dir = "$projectroot/$path";
1607         open($fd, "-|", git_cmd(), 'for-each-ref',
1608              '--format=%(committer)',
1609              '--sort=-committerdate',
1610              '--count=1',
1611              'refs/heads') or return;
1612         my $most_recent = <$fd>;
1613         close $fd or return;
1614         if (defined $most_recent &&
1615             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1616                 my $timestamp = $1;
1617                 my $age = time - $timestamp;
1618                 return ($age, age_string($age));
1619         }
1620         return (undef, undef);
1621 }
1622
1623 sub git_get_references {
1624         my $type = shift || "";
1625         my %refs;
1626         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1627         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1628         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1629                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1630                 or return;
1631
1632         while (my $line = <$fd>) {
1633                 chomp $line;
1634                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1635                         if (defined $refs{$1}) {
1636                                 push @{$refs{$1}}, $2;
1637                         } else {
1638                                 $refs{$1} = [ $2 ];
1639                         }
1640                 }
1641         }
1642         close $fd or return;
1643         return \%refs;
1644 }
1645
1646 sub git_get_rev_name_tags {
1647         my $hash = shift || return undef;
1648
1649         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1650                 or return;
1651         my $name_rev = <$fd>;
1652         close $fd;
1653
1654         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1655                 return $1;
1656         } else {
1657                 # catches also '$hash undefined' output
1658                 return undef;
1659         }
1660 }
1661
1662 ## ----------------------------------------------------------------------
1663 ## parse to hash functions
1664
1665 sub parse_date {
1666         my $epoch = shift;
1667         my $tz = shift || "-0000";
1668
1669         my %date;
1670         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1671         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1672         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1673         $date{'hour'} = $hour;
1674         $date{'minute'} = $min;
1675         $date{'mday'} = $mday;
1676         $date{'day'} = $days[$wday];
1677         $date{'month'} = $months[$mon];
1678         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1679                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1680         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1681                              $mday, $months[$mon], $hour ,$min;
1682         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1683                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1684
1685         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1686         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1687         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1688         $date{'hour_local'} = $hour;
1689         $date{'minute_local'} = $min;
1690         $date{'tz_local'} = $tz;
1691         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1692                                   1900+$year, $mon+1, $mday,
1693                                   $hour, $min, $sec, $tz);
1694         return %date;
1695 }
1696
1697 sub parse_tag {
1698         my $tag_id = shift;
1699         my %tag;
1700         my @comment;
1701
1702         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1703         $tag{'id'} = $tag_id;
1704         while (my $line = <$fd>) {
1705                 chomp $line;
1706                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1707                         $tag{'object'} = $1;
1708                 } elsif ($line =~ m/^type (.+)$/) {
1709                         $tag{'type'} = $1;
1710                 } elsif ($line =~ m/^tag (.+)$/) {
1711                         $tag{'name'} = $1;
1712                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1713                         $tag{'author'} = $1;
1714                         $tag{'epoch'} = $2;
1715                         $tag{'tz'} = $3;
1716                 } elsif ($line =~ m/--BEGIN/) {
1717                         push @comment, $line;
1718                         last;
1719                 } elsif ($line eq "") {
1720                         last;
1721                 }
1722         }
1723         push @comment, <$fd>;
1724         $tag{'comment'} = \@comment;
1725         close $fd or return;
1726         if (!defined $tag{'name'}) {
1727                 return
1728         };
1729         return %tag
1730 }
1731
1732 sub parse_commit_text {
1733         my ($commit_text, $withparents) = @_;
1734         my @commit_lines = split '\n', $commit_text;
1735         my %co;
1736
1737         pop @commit_lines; # Remove '\0'
1738
1739         if (! @commit_lines) {
1740                 return;
1741         }
1742
1743         my $header = shift @commit_lines;
1744         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1745                 return;
1746         }
1747         ($co{'id'}, my @parents) = split ' ', $header;
1748         while (my $line = shift @commit_lines) {
1749                 last if $line eq "\n";
1750                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1751                         $co{'tree'} = $1;
1752                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1753                         push @parents, $1;
1754                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1755                         $co{'author'} = $1;
1756                         $co{'author_epoch'} = $2;
1757                         $co{'author_tz'} = $3;
1758                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1759                                 $co{'author_name'}  = $1;
1760                                 $co{'author_email'} = $2;
1761                         } else {
1762                                 $co{'author_name'} = $co{'author'};
1763                         }
1764                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1765                         $co{'committer'} = $1;
1766                         $co{'committer_epoch'} = $2;
1767                         $co{'committer_tz'} = $3;
1768                         $co{'committer_name'} = $co{'committer'};
1769                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1770                                 $co{'committer_name'}  = $1;
1771                                 $co{'committer_email'} = $2;
1772                         } else {
1773                                 $co{'committer_name'} = $co{'committer'};
1774                         }
1775                 }
1776         }
1777         if (!defined $co{'tree'}) {
1778                 return;
1779         };
1780         $co{'parents'} = \@parents;
1781         $co{'parent'} = $parents[0];
1782
1783         foreach my $title (@commit_lines) {
1784                 $title =~ s/^    //;
1785                 if ($title ne "") {
1786                         $co{'title'} = chop_str($title, 80, 5);
1787                         # remove leading stuff of merges to make the interesting part visible
1788                         if (length($title) > 50) {
1789                                 $title =~ s/^Automatic //;
1790                                 $title =~ s/^merge (of|with) /Merge ... /i;
1791                                 if (length($title) > 50) {
1792                                         $title =~ s/(http|rsync):\/\///;
1793                                 }
1794                                 if (length($title) > 50) {
1795                                         $title =~ s/(master|www|rsync)\.//;
1796                                 }
1797                                 if (length($title) > 50) {
1798                                         $title =~ s/kernel.org:?//;
1799                                 }
1800                                 if (length($title) > 50) {
1801                                         $title =~ s/\/pub\/scm//;
1802                                 }
1803                         }
1804                         $co{'title_short'} = chop_str($title, 50, 5);
1805                         last;
1806                 }
1807         }
1808         if ($co{'title'} eq "") {
1809                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1810         }
1811         # remove added spaces
1812         foreach my $line (@commit_lines) {
1813                 $line =~ s/^    //;
1814         }
1815         $co{'comment'} = \@commit_lines;
1816
1817         my $age = time - $co{'committer_epoch'};
1818         $co{'age'} = $age;
1819         $co{'age_string'} = age_string($age);
1820         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1821         if ($age > 60*60*24*7*2) {
1822                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1823                 $co{'age_string_age'} = $co{'age_string'};
1824         } else {
1825                 $co{'age_string_date'} = $co{'age_string'};
1826                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1827         }
1828         return %co;
1829 }
1830
1831 sub parse_commit {
1832         my ($commit_id) = @_;
1833         my %co;
1834
1835         local $/ = "\0";
1836
1837         open my $fd, "-|", git_cmd(), "rev-list",
1838                 "--parents",
1839                 "--header",
1840                 "--max-count=1",
1841                 $commit_id,
1842                 "--",
1843                 or die_error(undef, "Open git-rev-list failed");
1844         %co = parse_commit_text(<$fd>, 1);
1845         close $fd;
1846
1847         return %co;
1848 }
1849
1850 sub parse_commits {
1851         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1852         my @cos;
1853
1854         $maxcount ||= 1;
1855         $skip ||= 0;
1856
1857         local $/ = "\0";
1858
1859         open my $fd, "-|", git_cmd(), "rev-list",
1860                 "--header",
1861                 ($arg ? ($arg) : ()),
1862                 ("--max-count=" . $maxcount),
1863                 ("--skip=" . $skip),
1864                 @extra_options,
1865                 $commit_id,
1866                 "--",
1867                 ($filename ? ($filename) : ())
1868                 or die_error(undef, "Open git-rev-list failed");
1869         while (my $line = <$fd>) {
1870                 my %co = parse_commit_text($line);
1871                 push @cos, \%co;
1872         }
1873         close $fd;
1874
1875         return wantarray ? @cos : \@cos;
1876 }
1877
1878 # parse ref from ref_file, given by ref_id, with given type
1879 sub parse_ref {
1880         my $ref_file = shift;
1881         my $ref_id = shift;
1882         my $type = shift || git_get_type($ref_id);
1883         my %ref_item;
1884
1885         $ref_item{'type'} = $type;
1886         $ref_item{'id'} = $ref_id;
1887         $ref_item{'epoch'} = 0;
1888         $ref_item{'age'} = "unknown";
1889         if ($type eq "tag") {
1890                 my %tag = parse_tag($ref_id);
1891                 $ref_item{'comment'} = $tag{'comment'};
1892                 if ($tag{'type'} eq "commit") {
1893                         my %co = parse_commit($tag{'object'});
1894                         $ref_item{'epoch'} = $co{'committer_epoch'};
1895                         $ref_item{'age'} = $co{'age_string'};
1896                 } elsif (defined($tag{'epoch'})) {
1897                         my $age = time - $tag{'epoch'};
1898                         $ref_item{'epoch'} = $tag{'epoch'};
1899                         $ref_item{'age'} = age_string($age);
1900                 }
1901                 $ref_item{'reftype'} = $tag{'type'};
1902                 $ref_item{'name'} = $tag{'name'};
1903                 $ref_item{'refid'} = $tag{'object'};
1904         } elsif ($type eq "commit"){
1905                 my %co = parse_commit($ref_id);
1906                 $ref_item{'reftype'} = "commit";
1907                 $ref_item{'name'} = $ref_file;
1908                 $ref_item{'title'} = $co{'title'};
1909                 $ref_item{'refid'} = $ref_id;
1910                 $ref_item{'epoch'} = $co{'committer_epoch'};
1911                 $ref_item{'age'} = $co{'age_string'};
1912         } else {
1913                 $ref_item{'reftype'} = $type;
1914                 $ref_item{'name'} = $ref_file;
1915                 $ref_item{'refid'} = $ref_id;
1916         }
1917
1918         return %ref_item;
1919 }
1920
1921 # parse line of git-diff-tree "raw" output
1922 sub parse_difftree_raw_line {
1923         my $line = shift;
1924         my %res;
1925
1926         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1927         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1928         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1929                 $res{'from_mode'} = $1;
1930                 $res{'to_mode'} = $2;
1931                 $res{'from_id'} = $3;
1932                 $res{'to_id'} = $4;
1933                 $res{'status'} = $5;
1934                 $res{'similarity'} = $6;
1935                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1936                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1937                 } else {
1938                         $res{'file'} = unquote($7);
1939                 }
1940         }
1941         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1942         # combined diff (for merge commit)
1943         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1944                 $res{'nparents'}  = length($1);
1945                 $res{'from_mode'} = [ split(' ', $2) ];
1946                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1947                 $res{'from_id'} = [ split(' ', $3) ];
1948                 $res{'to_id'} = pop @{$res{'from_id'}};
1949                 $res{'status'} = [ split('', $4) ];
1950                 $res{'to_file'} = unquote($5);
1951         }
1952         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1953         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1954                 $res{'commit'} = $1;
1955         }
1956
1957         return wantarray ? %res : \%res;
1958 }
1959
1960 # parse line of git-ls-tree output
1961 sub parse_ls_tree_line ($;%) {
1962         my $line = shift;
1963         my %opts = @_;
1964         my %res;
1965
1966         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1967         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
1968
1969         $res{'mode'} = $1;
1970         $res{'type'} = $2;
1971         $res{'hash'} = $3;
1972         if ($opts{'-z'}) {
1973                 $res{'name'} = $4;
1974         } else {
1975                 $res{'name'} = unquote($4);
1976         }
1977
1978         return wantarray ? %res : \%res;
1979 }
1980
1981 # generates _two_ hashes, references to which are passed as 2 and 3 argument
1982 sub parse_from_to_diffinfo {
1983         my ($diffinfo, $from, $to, @parents) = @_;
1984
1985         if ($diffinfo->{'nparents'}) {
1986                 # combined diff
1987                 $from->{'file'} = [];
1988                 $from->{'href'} = [];
1989                 fill_from_file_info($diffinfo, @parents)
1990                         unless exists $diffinfo->{'from_file'};
1991                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1992                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
1993                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
1994                                 $from->{'href'}[$i] = href(action=>"blob",
1995                                                            hash_base=>$parents[$i],
1996                                                            hash=>$diffinfo->{'from_id'}[$i],
1997                                                            file_name=>$from->{'file'}[$i]);
1998                         } else {
1999                                 $from->{'href'}[$i] = undef;
2000                         }
2001                 }
2002         } else {
2003                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2004                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2005                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2006                                                hash=>$diffinfo->{'from_id'},
2007                                                file_name=>$from->{'file'});
2008                 } else {
2009                         delete $from->{'href'};
2010                 }
2011         }
2012
2013         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2014         if (!is_deleted($diffinfo)) { # file exists in result
2015                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2016                                      hash=>$diffinfo->{'to_id'},
2017                                      file_name=>$to->{'file'});
2018         } else {
2019                 delete $to->{'href'};
2020         }
2021 }
2022
2023 ## ......................................................................
2024 ## parse to array of hashes functions
2025
2026 sub git_get_heads_list {
2027         my $limit = shift;
2028         my @headslist;
2029
2030         open my $fd, '-|', git_cmd(), 'for-each-ref',
2031                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2032                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2033                 'refs/heads'
2034                 or return;
2035         while (my $line = <$fd>) {
2036                 my %ref_item;
2037
2038                 chomp $line;
2039                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2040                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2041                 my ($committer, $epoch, $tz) =
2042                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2043                 $name =~ s!^refs/heads/!!;
2044
2045                 $ref_item{'name'}  = $name;
2046                 $ref_item{'id'}    = $hash;
2047                 $ref_item{'title'} = $title || '(no commit message)';
2048                 $ref_item{'epoch'} = $epoch;
2049                 if ($epoch) {
2050                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2051                 } else {
2052                         $ref_item{'age'} = "unknown";
2053                 }
2054
2055                 push @headslist, \%ref_item;
2056         }
2057         close $fd;
2058
2059         return wantarray ? @headslist : \@headslist;
2060 }
2061
2062 sub git_get_tags_list {
2063         my $limit = shift;
2064         my @tagslist;
2065
2066         open my $fd, '-|', git_cmd(), 'for-each-ref',
2067                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2068                 '--format=%(objectname) %(objecttype) %(refname) '.
2069                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2070                 'refs/tags'
2071                 or return;
2072         while (my $line = <$fd>) {
2073                 my %ref_item;
2074
2075                 chomp $line;
2076                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2077                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2078                 my ($creator, $epoch, $tz) =
2079                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2080                 $name =~ s!^refs/tags/!!;
2081
2082                 $ref_item{'type'} = $type;
2083                 $ref_item{'id'} = $id;
2084                 $ref_item{'name'} = $name;
2085                 if ($type eq "tag") {
2086                         $ref_item{'subject'} = $title;
2087                         $ref_item{'reftype'} = $reftype;
2088                         $ref_item{'refid'}   = $refid;
2089                 } else {
2090                         $ref_item{'reftype'} = $type;
2091                         $ref_item{'refid'}   = $id;
2092                 }
2093
2094                 if ($type eq "tag" || $type eq "commit") {
2095                         $ref_item{'epoch'} = $epoch;
2096                         if ($epoch) {
2097                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2098                         } else {
2099                                 $ref_item{'age'} = "unknown";
2100                         }
2101                 }
2102
2103                 push @tagslist, \%ref_item;
2104         }
2105         close $fd;
2106
2107         return wantarray ? @tagslist : \@tagslist;
2108 }
2109
2110 ## ----------------------------------------------------------------------
2111 ## filesystem-related functions
2112
2113 sub get_file_owner {
2114         my $path = shift;
2115
2116         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2117         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2118         if (!defined $gcos) {
2119                 return undef;
2120         }
2121         my $owner = $gcos;
2122         $owner =~ s/[,;].*$//;
2123         return to_utf8($owner);
2124 }
2125
2126 ## ......................................................................
2127 ## mimetype related functions
2128
2129 sub mimetype_guess_file {
2130         my $filename = shift;
2131         my $mimemap = shift;
2132         -r $mimemap or return undef;
2133
2134         my %mimemap;
2135         open(MIME, $mimemap) or return undef;
2136         while (<MIME>) {
2137                 next if m/^#/; # skip comments
2138                 my ($mime, $exts) = split(/\t+/);
2139                 if (defined $exts) {
2140                         my @exts = split(/\s+/, $exts);
2141                         foreach my $ext (@exts) {
2142                                 $mimemap{$ext} = $mime;
2143                         }
2144                 }
2145         }
2146         close(MIME);
2147
2148         $filename =~ /\.([^.]*)$/;
2149         return $mimemap{$1};
2150 }
2151
2152 sub mimetype_guess {
2153         my $filename = shift;
2154         my $mime;
2155         $filename =~ /\./ or return undef;
2156
2157         if ($mimetypes_file) {
2158                 my $file = $mimetypes_file;
2159                 if ($file !~ m!^/!) { # if it is relative path
2160                         # it is relative to project
2161                         $file = "$projectroot/$project/$file";
2162                 }
2163                 $mime = mimetype_guess_file($filename, $file);
2164         }
2165         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2166         return $mime;
2167 }
2168
2169 sub blob_mimetype {
2170         my $fd = shift;
2171         my $filename = shift;
2172
2173         if ($filename) {
2174                 my $mime = mimetype_guess($filename);
2175                 $mime and return $mime;
2176         }
2177
2178         # just in case
2179         return $default_blob_plain_mimetype unless $fd;
2180
2181         if (-T $fd) {
2182                 return 'text/plain' .
2183                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2184         } elsif (! $filename) {
2185                 return 'application/octet-stream';
2186         } elsif ($filename =~ m/\.png$/i) {
2187                 return 'image/png';
2188         } elsif ($filename =~ m/\.gif$/i) {
2189                 return 'image/gif';
2190         } elsif ($filename =~ m/\.jpe?g$/i) {
2191                 return 'image/jpeg';
2192         } else {
2193                 return 'application/octet-stream';
2194         }
2195 }
2196
2197 ## ======================================================================
2198 ## functions printing HTML: header, footer, error page
2199
2200 sub git_header_html {
2201         my $status = shift || "200 OK";
2202         my $expires = shift;
2203
2204         my $title = "$site_name";
2205         if (defined $project) {
2206                 $title .= " - " . to_utf8($project);
2207                 if (defined $action) {
2208                         $title .= "/$action";
2209                         if (defined $file_name) {
2210                                 $title .= " - " . esc_path($file_name);
2211                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2212                                         $title .= "/";
2213                                 }
2214                         }
2215                 }
2216         }
2217         my $content_type;
2218         # require explicit support from the UA if we are to send the page as
2219         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2220         # we have to do this because MSIE sometimes globs '*/*', pretending to
2221         # support xhtml+xml but choking when it gets what it asked for.
2222         if (defined $cgi->http('HTTP_ACCEPT') &&
2223             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2224             $cgi->Accept('application/xhtml+xml') != 0) {
2225                 $content_type = 'application/xhtml+xml';
2226         } else {
2227                 $content_type = 'text/html';
2228         }
2229         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2230                            -status=> $status, -expires => $expires);
2231         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2232         print <<EOF;
2233 <?xml version="1.0" encoding="utf-8"?>
2234 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2235 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2236 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2237 <!-- git core binaries version $git_version -->
2238 <head>
2239 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2240 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2241 <meta name="robots" content="index, nofollow"/>
2242 <title>$title</title>
2243 EOF
2244 # print out each stylesheet that exist
2245         if (defined $stylesheet) {
2246 #provides backwards capability for those people who define style sheet in a config file
2247                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2248         } else {
2249                 foreach my $stylesheet (@stylesheets) {
2250                         next unless $stylesheet;
2251                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2252                 }
2253         }
2254         if (defined $project) {
2255                 printf('<link rel="alternate" title="%s log RSS feed" '.
2256                        'href="%s" type="application/rss+xml" />'."\n",
2257                        esc_param($project), href(action=>"rss"));
2258                 printf('<link rel="alternate" title="%s log Atom feed" '.
2259                        'href="%s" type="application/atom+xml" />'."\n",
2260                        esc_param($project), href(action=>"atom"));
2261         } else {
2262                 printf('<link rel="alternate" title="%s projects list" '.
2263                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2264                        $site_name, href(project=>undef, action=>"project_index"));
2265                 printf('<link rel="alternate" title="%s projects feeds" '.
2266                        'href="%s" type="text/x-opml"/>'."\n",
2267                        $site_name, href(project=>undef, action=>"opml"));
2268         }
2269         if (defined $favicon) {
2270                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2271         }
2272
2273         print "</head>\n" .
2274               "<body>\n";
2275
2276         if (-f $site_header) {
2277                 open (my $fd, $site_header);
2278                 print <$fd>;
2279                 close $fd;
2280         }
2281
2282         print "<div class=\"page_header\">\n" .
2283               $cgi->a({-href => esc_url($logo_url),
2284                        -title => $logo_label},
2285                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2286         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2287         if (defined $project) {
2288                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2289                 if (defined $action) {
2290                         print " / $action";
2291                 }
2292                 print "\n";
2293         }
2294         print "</div>\n";
2295
2296         my ($have_search) = gitweb_check_feature('search');
2297         if ((defined $project) && ($have_search)) {
2298                 if (!defined $searchtext) {
2299                         $searchtext = "";
2300                 }
2301                 my $search_hash;
2302                 if (defined $hash_base) {
2303                         $search_hash = $hash_base;
2304                 } elsif (defined $hash) {
2305                         $search_hash = $hash;
2306                 } else {
2307                         $search_hash = "HEAD";
2308                 }
2309                 my $action = $my_uri;
2310                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2311                 if ($use_pathinfo) {
2312                         $action .= "/$project";
2313                 } else {
2314                         $cgi->param("p", $project);
2315                 }
2316                 $cgi->param("a", "search");
2317                 $cgi->param("h", $search_hash);
2318                 print $cgi->startform(-method => "get", -action => $action) .
2319                       "<div class=\"search\">\n" .
2320                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2321                       $cgi->hidden(-name => "a") . "\n" .
2322                       $cgi->hidden(-name => "h") . "\n" .
2323                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2324                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2325                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2326                       " search:\n",
2327                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2328                       "</div>" .
2329                       $cgi->end_form() . "\n";
2330         }
2331 }
2332
2333 sub git_footer_html {
2334         print "<div class=\"page_footer\">\n";
2335         if (defined $project) {
2336                 my $descr = git_get_project_description($project);
2337                 if (defined $descr) {
2338                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2339                 }
2340                 print $cgi->a({-href => href(action=>"rss"),
2341                               -class => "rss_logo"}, "RSS") . " ";
2342                 print $cgi->a({-href => href(action=>"atom"),
2343                               -class => "rss_logo"}, "Atom") . "\n";
2344         } else {
2345                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2346                               -class => "rss_logo"}, "OPML") . " ";
2347                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2348                               -class => "rss_logo"}, "TXT") . "\n";
2349         }
2350         print "</div>\n" ;
2351
2352         if (-f $site_footer) {
2353                 open (my $fd, $site_footer);
2354                 print <$fd>;
2355                 close $fd;
2356         }
2357
2358         print "</body>\n" .
2359               "</html>";
2360 }
2361
2362 sub die_error {
2363         my $status = shift || "403 Forbidden";
2364         my $error = shift || "Malformed query, file missing or permission denied";
2365
2366         git_header_html($status);
2367         print <<EOF;
2368 <div class="page_body">
2369 <br /><br />
2370 $status - $error
2371 <br />
2372 </div>
2373 EOF
2374         git_footer_html();
2375         exit;
2376 }
2377
2378 ## ----------------------------------------------------------------------
2379 ## functions printing or outputting HTML: navigation
2380
2381 sub git_print_page_nav {
2382         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2383         $extra = '' if !defined $extra; # pager or formats
2384
2385         my @navs = qw(summary shortlog log commit commitdiff tree);
2386         if ($suppress) {
2387                 @navs = grep { $_ ne $suppress } @navs;
2388         }
2389
2390         my %arg = map { $_ => {action=>$_} } @navs;
2391         if (defined $head) {
2392                 for (qw(commit commitdiff)) {
2393                         $arg{$_}{'hash'} = $head;
2394                 }
2395                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2396                         for (qw(shortlog log)) {
2397                                 $arg{$_}{'hash'} = $head;
2398                         }
2399                 }
2400         }
2401         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2402         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2403
2404         print "<div class=\"page_nav\">\n" .
2405                 (join " | ",
2406                  map { $_ eq $current ?
2407                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2408                  } @navs);
2409         print "<br/>\n$extra<br/>\n" .
2410               "</div>\n";
2411 }
2412
2413 sub format_paging_nav {
2414         my ($action, $hash, $head, $page, $nrevs) = @_;
2415         my $paging_nav;
2416
2417
2418         if ($hash ne $head || $page) {
2419                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2420         } else {
2421                 $paging_nav .= "HEAD";
2422         }
2423
2424         if ($page > 0) {
2425                 $paging_nav .= " &sdot; " .
2426                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2427                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2428         } else {
2429                 $paging_nav .= " &sdot; prev";
2430         }
2431
2432         if ($nrevs >= (100 * ($page+1)-1)) {
2433                 $paging_nav .= " &sdot; " .
2434                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2435                                  -accesskey => "n", -title => "Alt-n"}, "next");
2436         } else {
2437                 $paging_nav .= " &sdot; next";
2438         }
2439
2440         return $paging_nav;
2441 }
2442
2443 ## ......................................................................
2444 ## functions printing or outputting HTML: div
2445
2446 sub git_print_header_div {
2447         my ($action, $title, $hash, $hash_base) = @_;
2448         my %args = ();
2449
2450         $args{'action'} = $action;
2451         $args{'hash'} = $hash if $hash;
2452         $args{'hash_base'} = $hash_base if $hash_base;
2453
2454         print "<div class=\"header\">\n" .
2455               $cgi->a({-href => href(%args), -class => "title"},
2456               $title ? $title : $action) .
2457               "\n</div>\n";
2458 }
2459
2460 #sub git_print_authorship (\%) {
2461 sub git_print_authorship {
2462         my $co = shift;
2463
2464         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2465         print "<div class=\"author_date\">" .
2466               esc_html($co->{'author_name'}) .
2467               " [$ad{'rfc2822'}";
2468         if ($ad{'hour_local'} < 6) {
2469                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2470                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2471         } else {
2472                 printf(" (%02d:%02d %s)",
2473                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2474         }
2475         print "]</div>\n";
2476 }
2477
2478 sub git_print_page_path {
2479         my $name = shift;
2480         my $type = shift;
2481         my $hb = shift;
2482
2483
2484         print "<div class=\"page_path\">";
2485         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2486                       -title => 'tree root'}, to_utf8("[$project]"));
2487         print " / ";
2488         if (defined $name) {
2489                 my @dirname = split '/', $name;
2490                 my $basename = pop @dirname;
2491                 my $fullname = '';
2492
2493                 foreach my $dir (@dirname) {
2494                         $fullname .= ($fullname ? '/' : '') . $dir;
2495                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2496                                                      hash_base=>$hb),
2497                                       -title => $fullname}, esc_path($dir));
2498                         print " / ";
2499                 }
2500                 if (defined $type && $type eq 'blob') {
2501                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2502                                                      hash_base=>$hb),
2503                                       -title => $name}, esc_path($basename));
2504                 } elsif (defined $type && $type eq 'tree') {
2505                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2506                                                      hash_base=>$hb),
2507                                       -title => $name}, esc_path($basename));
2508                         print " / ";
2509                 } else {
2510                         print esc_path($basename);
2511                 }
2512         }
2513         print "<br/></div>\n";
2514 }
2515
2516 # sub git_print_log (\@;%) {
2517 sub git_print_log ($;%) {
2518         my $log = shift;
2519         my %opts = @_;
2520
2521         if ($opts{'-remove_title'}) {
2522                 # remove title, i.e. first line of log
2523                 shift @$log;
2524         }
2525         # remove leading empty lines
2526         while (defined $log->[0] && $log->[0] eq "") {
2527                 shift @$log;
2528         }
2529
2530         # print log
2531         my $signoff = 0;
2532         my $empty = 0;
2533         foreach my $line (@$log) {
2534                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2535                         $signoff = 1;
2536                         $empty = 0;
2537                         if (! $opts{'-remove_signoff'}) {
2538                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2539                                 next;
2540                         } else {
2541                                 # remove signoff lines
2542                                 next;
2543                         }
2544                 } else {
2545                         $signoff = 0;
2546                 }
2547
2548                 # print only one empty line
2549                 # do not print empty line after signoff
2550                 if ($line eq "") {
2551                         next if ($empty || $signoff);
2552                         $empty = 1;
2553                 } else {
2554                         $empty = 0;
2555                 }
2556
2557                 print format_log_line_html($line) . "<br/>\n";
2558         }
2559
2560         if ($opts{'-final_empty_line'}) {
2561                 # end with single empty line
2562                 print "<br/>\n" unless $empty;
2563         }
2564 }
2565
2566 # return link target (what link points to)
2567 sub git_get_link_target {
2568         my $hash = shift;
2569         my $link_target;
2570
2571         # read link
2572         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2573                 or return;
2574         {
2575                 local $/;
2576                 $link_target = <$fd>;
2577         }
2578         close $fd
2579                 or return;
2580
2581         return $link_target;
2582 }
2583
2584 # given link target, and the directory (basedir) the link is in,
2585 # return target of link relative to top directory (top tree);
2586 # return undef if it is not possible (including absolute links).
2587 sub normalize_link_target {
2588         my ($link_target, $basedir, $hash_base) = @_;
2589
2590         # we can normalize symlink target only if $hash_base is provided
2591         return unless $hash_base;
2592
2593         # absolute symlinks (beginning with '/') cannot be normalized
2594         return if (substr($link_target, 0, 1) eq '/');
2595
2596         # normalize link target to path from top (root) tree (dir)
2597         my $path;
2598         if ($basedir) {
2599                 $path = $basedir . '/' . $link_target;
2600         } else {
2601                 # we are in top (root) tree (dir)
2602                 $path = $link_target;
2603         }
2604
2605         # remove //, /./, and /../
2606         my @path_parts;
2607         foreach my $part (split('/', $path)) {
2608                 # discard '.' and ''
2609                 next if (!$part || $part eq '.');
2610                 # handle '..'
2611                 if ($part eq '..') {
2612                         if (@path_parts) {
2613                                 pop @path_parts;
2614                         } else {
2615                                 # link leads outside repository (outside top dir)
2616                                 return;
2617                         }
2618                 } else {
2619                         push @path_parts, $part;
2620                 }
2621         }
2622         $path = join('/', @path_parts);
2623
2624         return $path;
2625 }
2626
2627 # print tree entry (row of git_tree), but without encompassing <tr> element
2628 sub git_print_tree_entry {
2629         my ($t, $basedir, $hash_base, $have_blame) = @_;
2630
2631         my %base_key = ();
2632         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2633
2634         # The format of a table row is: mode list link.  Where mode is
2635         # the mode of the entry, list is the name of the entry, an href,
2636         # and link is the action links of the entry.
2637
2638         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2639         if ($t->{'type'} eq "blob") {
2640                 print "<td class=\"list\">" .
2641                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2642                                                file_name=>"$basedir$t->{'name'}", %base_key),
2643                                 -class => "list"}, esc_path($t->{'name'}));
2644                 if (S_ISLNK(oct $t->{'mode'})) {
2645                         my $link_target = git_get_link_target($t->{'hash'});
2646                         if ($link_target) {
2647                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2648                                 if (defined $norm_target) {
2649                                         print " -> " .
2650                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2651                                                                      file_name=>$norm_target),
2652                                                        -title => $norm_target}, esc_path($link_target));
2653                                 } else {
2654                                         print " -> " . esc_path($link_target);
2655                                 }
2656                         }
2657                 }
2658                 print "</td>\n";
2659                 print "<td class=\"link\">";
2660                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2661                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2662                               "blob");
2663                 if ($have_blame) {
2664                         print " | " .
2665                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2666                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2667                                       "blame");
2668                 }
2669                 if (defined $hash_base) {
2670                         print " | " .
2671                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2672                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2673                                       "history");
2674                 }
2675                 print " | " .
2676                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2677                                                file_name=>"$basedir$t->{'name'}")},
2678                                 "raw");
2679                 print "</td>\n";
2680
2681         } elsif ($t->{'type'} eq "tree") {
2682                 print "<td class=\"list\">";
2683                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2684                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2685                               esc_path($t->{'name'}));
2686                 print "</td>\n";
2687                 print "<td class=\"link\">";
2688                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2689                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2690                               "tree");
2691                 if (defined $hash_base) {
2692                         print " | " .
2693                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2694                                                      file_name=>"$basedir$t->{'name'}")},
2695                                       "history");
2696                 }
2697                 print "</td>\n";
2698         }
2699 }
2700
2701 ## ......................................................................
2702 ## functions printing large fragments of HTML
2703
2704 sub fill_from_file_info {
2705         my ($diff, @parents) = @_;
2706
2707         $diff->{'from_file'} = [ ];
2708         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2709         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2710                 if ($diff->{'status'}[$i] eq 'R' ||
2711                     $diff->{'status'}[$i] eq 'C') {
2712                         $diff->{'from_file'}[$i] =
2713                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2714                 }
2715         }
2716
2717         return $diff;
2718 }
2719
2720 # parameters can be strings, or references to arrays of strings
2721 sub from_ids_eq {
2722         my ($a, $b) = @_;
2723
2724         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2725                 for (my $i = 0; $i < @$a; ++$i) {
2726                         return 0 unless ($a->[$i] eq $b->[$i]);
2727                 }
2728                 return 1;
2729         } elsif (!ref($a) && !ref($b)) {
2730                 return $a eq $b;
2731         } else {
2732                 return 0;
2733         }
2734 }
2735
2736 sub is_deleted {
2737         my $diffinfo = shift;
2738
2739         return $diffinfo->{'to_id'} eq ('0' x 40);
2740 }
2741
2742 sub git_difftree_body {
2743         my ($difftree, $hash, @parents) = @_;
2744         my ($parent) = $parents[0];
2745         my ($have_blame) = gitweb_check_feature('blame');
2746         print "<div class=\"list_head\">\n";
2747         if ($#{$difftree} > 10) {
2748                 print(($#{$difftree} + 1) . " files changed:\n");
2749         }
2750         print "</div>\n";
2751
2752         print "<table class=\"" .
2753               (@parents > 1 ? "combined " : "") .
2754               "diff_tree\">\n";
2755
2756         # header only for combined diff in 'commitdiff' view
2757         my $has_header = @parents > 1 && $action eq 'commitdiff';
2758         if ($has_header) {
2759                 # table header
2760                 print "<thead><tr>\n" .
2761                        "<th></th><th></th>\n"; # filename, patchN link
2762                 for (my $i = 0; $i < @parents; $i++) {
2763                         my $par = $parents[$i];
2764                         print "<th>" .
2765                               $cgi->a({-href => href(action=>"commitdiff",
2766                                                      hash=>$hash, hash_parent=>$par),
2767                                        -title => 'commitdiff to parent number ' .
2768                                                   ($i+1) . ': ' . substr($par,0,7)},
2769                                       $i+1) .
2770                               "&nbsp;</th>\n";
2771                 }
2772                 print "</tr></thead>\n<tbody>\n";
2773         }
2774
2775         my $alternate = 1;
2776         my $patchno = 0;
2777         foreach my $line (@{$difftree}) {
2778                 my $diff;
2779                 if (ref($line) eq "HASH") {
2780                         # pre-parsed (or generated by hand)
2781                         $diff = $line;
2782                 } else {
2783                         $diff = parse_difftree_raw_line($line);
2784                 }
2785
2786                 if ($alternate) {
2787                         print "<tr class=\"dark\">\n";
2788                 } else {
2789                         print "<tr class=\"light\">\n";
2790                 }
2791                 $alternate ^= 1;
2792
2793                 if (exists $diff->{'nparents'}) { # combined diff
2794
2795                         fill_from_file_info($diff, @parents)
2796                                 unless exists $diff->{'from_file'};
2797
2798                         if (!is_deleted($diff)) {
2799                                 # file exists in the result (child) commit
2800                                 print "<td>" .
2801                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2802                                                              file_name=>$diff->{'to_file'},
2803                                                              hash_base=>$hash),
2804                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2805                                       "</td>\n";
2806                         } else {
2807                                 print "<td>" .
2808                                       esc_path($diff->{'to_file'}) .
2809                                       "</td>\n";
2810                         }
2811
2812                         if ($action eq 'commitdiff') {
2813                                 # link to patch
2814                                 $patchno++;
2815                                 print "<td class=\"link\">" .
2816                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2817                                       " | " .
2818                                       "</td>\n";
2819                         }
2820
2821                         my $has_history = 0;
2822                         my $not_deleted = 0;
2823                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2824                                 my $hash_parent = $parents[$i];
2825                                 my $from_hash = $diff->{'from_id'}[$i];
2826                                 my $from_path = $diff->{'from_file'}[$i];
2827                                 my $status = $diff->{'status'}[$i];
2828
2829                                 $has_history ||= ($status ne 'A');
2830                                 $not_deleted ||= ($status ne 'D');
2831
2832                                 if ($status eq 'A') {
2833                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2834                                 } elsif ($status eq 'D') {
2835                                         print "<td class=\"link\">" .
2836                                               $cgi->a({-href => href(action=>"blob",
2837                                                                      hash_base=>$hash,
2838                                                                      hash=>$from_hash,
2839                                                                      file_name=>$from_path)},
2840                                                       "blob" . ($i+1)) .
2841                                               " | </td>\n";
2842                                 } else {
2843                                         if ($diff->{'to_id'} eq $from_hash) {
2844                                                 print "<td class=\"link nochange\">";
2845                                         } else {
2846                                                 print "<td class=\"link\">";
2847                                         }
2848                                         print $cgi->a({-href => href(action=>"blobdiff",
2849                                                                      hash=>$diff->{'to_id'},
2850                                                                      hash_parent=>$from_hash,
2851                                                                      hash_base=>$hash,
2852                                                                      hash_parent_base=>$hash_parent,
2853                                                                      file_name=>$diff->{'to_file'},
2854                                                                      file_parent=>$from_path)},
2855                                                       "diff" . ($i+1)) .
2856                                               " | </td>\n";
2857                                 }
2858                         }
2859
2860                         print "<td class=\"link\">";
2861                         if ($not_deleted) {
2862                                 print $cgi->a({-href => href(action=>"blob",
2863                                                              hash=>$diff->{'to_id'},
2864                                                              file_name=>$diff->{'to_file'},
2865                                                              hash_base=>$hash)},
2866                                               "blob");
2867                                 print " | " if ($has_history);
2868                         }
2869                         if ($has_history) {
2870                                 print $cgi->a({-href => href(action=>"history",
2871                                                              file_name=>$diff->{'to_file'},
2872                                                              hash_base=>$hash)},
2873                                               "history");
2874                         }
2875                         print "</td>\n";
2876
2877                         print "</tr>\n";
2878                         next; # instead of 'else' clause, to avoid extra indent
2879                 }
2880                 # else ordinary diff
2881
2882                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2883                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2884                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2885                         $to_mode_oct = oct $diff->{'to_mode'};
2886                         if (S_ISREG($to_mode_oct)) { # only for regular file
2887                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2888                         }
2889                         $to_file_type = file_type($diff->{'to_mode'});
2890                 }
2891                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2892                         $from_mode_oct = oct $diff->{'from_mode'};
2893                         if (S_ISREG($to_mode_oct)) { # only for regular file
2894                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2895                         }
2896                         $from_file_type = file_type($diff->{'from_mode'});
2897                 }
2898
2899                 if ($diff->{'status'} eq "A") { # created
2900                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2901                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2902                         $mode_chng   .= "]</span>";
2903                         print "<td>";
2904                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2905                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2906                                       -class => "list"}, esc_path($diff->{'file'}));
2907                         print "</td>\n";
2908                         print "<td>$mode_chng</td>\n";
2909                         print "<td class=\"link\">";
2910                         if ($action eq 'commitdiff') {
2911                                 # link to patch
2912                                 $patchno++;
2913                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2914                                 print " | ";
2915                         }
2916                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2917                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2918                                       "blob");
2919                         print "</td>\n";
2920
2921                 } elsif ($diff->{'status'} eq "D") { # deleted
2922                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2923                         print "<td>";
2924                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2925                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2926                                        -class => "list"}, esc_path($diff->{'file'}));
2927                         print "</td>\n";
2928                         print "<td>$mode_chng</td>\n";
2929                         print "<td class=\"link\">";
2930                         if ($action eq 'commitdiff') {
2931                                 # link to patch
2932                                 $patchno++;
2933                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2934                                 print " | ";
2935                         }
2936                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2937                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2938                                       "blob") . " | ";
2939                         if ($have_blame) {
2940                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
2941                                                              file_name=>$diff->{'file'})},
2942                                               "blame") . " | ";
2943                         }
2944                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
2945                                                      file_name=>$diff->{'file'})},
2946                                       "history");
2947                         print "</td>\n";
2948
2949                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
2950                         my $mode_chnge = "";
2951                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
2952                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
2953                                 if ($from_file_type ne $to_file_type) {
2954                                         $mode_chnge .= " from $from_file_type to $to_file_type";
2955                                 }
2956                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
2957                                         if ($from_mode_str && $to_mode_str) {
2958                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
2959                                         } elsif ($to_mode_str) {
2960                                                 $mode_chnge .= " mode: $to_mode_str";
2961                                         }
2962                                 }
2963                                 $mode_chnge .= "]</span>\n";
2964                         }
2965                         print "<td>";
2966                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2967                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2968                                       -class => "list"}, esc_path($diff->{'file'}));
2969                         print "</td>\n";
2970                         print "<td>$mode_chnge</td>\n";
2971                         print "<td class=\"link\">";
2972                         if ($action eq 'commitdiff') {
2973                                 # link to patch
2974                                 $patchno++;
2975                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
2976                                       " | ";
2977                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
2978                                 # "commit" view and modified file (not onlu mode changed)
2979                                 print $cgi->a({-href => href(action=>"blobdiff",
2980                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
2981                                                              hash_base=>$hash, hash_parent_base=>$parent,
2982                                                              file_name=>$diff->{'file'})},
2983                                               "diff") .
2984                                       " | ";
2985                         }
2986                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2987                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2988                                        "blob") . " | ";
2989                         if ($have_blame) {
2990                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
2991                                                              file_name=>$diff->{'file'})},
2992                                               "blame") . " | ";
2993                         }
2994                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
2995                                                      file_name=>$diff->{'file'})},
2996                                       "history");
2997                         print "</td>\n";
2998
2999                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3000                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3001                         my $nstatus = $status_name{$diff->{'status'}};
3002                         my $mode_chng = "";
3003                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3004                                 # mode also for directories, so we cannot use $to_mode_str
3005                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3006                         }
3007                         print "<td>" .
3008                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3009                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3010                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3011                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3012                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3013                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3014                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3015                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3016                               "<td class=\"link\">";
3017                         if ($action eq 'commitdiff') {
3018                                 # link to patch
3019                                 $patchno++;
3020                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3021                                       " | ";
3022                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3023                                 # "commit" view and modified file (not only pure rename or copy)
3024                                 print $cgi->a({-href => href(action=>"blobdiff",
3025                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3026                                                              hash_base=>$hash, hash_parent_base=>$parent,
3027                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3028                                               "diff") .
3029                                       " | ";
3030                         }
3031                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3032                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3033                                       "blob") . " | ";
3034                         if ($have_blame) {
3035                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3036                                                              file_name=>$diff->{'to_file'})},
3037                                               "blame") . " | ";
3038                         }
3039                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3040                                                     file_name=>$diff->{'to_file'})},
3041                                       "history");
3042                         print "</td>\n";
3043
3044                 } # we should not encounter Unmerged (U) or Unknown (X) status
3045                 print "</tr>\n";
3046         }
3047         print "</tbody>" if $has_header;
3048         print "</table>\n";
3049 }
3050
3051 sub git_patchset_body {
3052         my ($fd, $difftree, $hash, @hash_parents) = @_;
3053         my ($hash_parent) = $hash_parents[0];
3054
3055         my $patch_idx = 0;
3056         my $patch_number = 0;
3057         my $patch_line;
3058         my $diffinfo;
3059         my (%from, %to);
3060
3061         print "<div class=\"patchset\">\n";
3062
3063         # skip to first patch
3064         while ($patch_line = <$fd>) {
3065                 chomp $patch_line;
3066
3067                 last if ($patch_line =~ m/^diff /);
3068         }
3069
3070  PATCH:
3071         while ($patch_line) {
3072                 my @diff_header;
3073                 my ($from_id, $to_id);
3074
3075                 # git diff header
3076                 #assert($patch_line =~ m/^diff /) if DEBUG;
3077                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3078                 $patch_number++;
3079                 push @diff_header, $patch_line;
3080
3081                 # extended diff header
3082         EXTENDED_HEADER:
3083                 while ($patch_line = <$fd>) {
3084                         chomp $patch_line;
3085
3086                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3087
3088                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3089                                 $from_id = $1;
3090                                 $to_id   = $2;
3091                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3092                                 $from_id = [ split(',', $1) ];
3093                                 $to_id   = $2;
3094                         }
3095
3096                         push @diff_header, $patch_line;
3097                 }
3098                 my $last_patch_line = $patch_line;
3099
3100                 # check if current patch belong to current raw line
3101                 # and parse raw git-diff line if needed
3102                 if (defined $diffinfo &&
3103                     defined $from_id && defined $to_id &&
3104                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3105                     $diffinfo->{'to_id'} eq $to_id) {
3106                         # this is continuation of a split patch
3107                         print "<div class=\"patch cont\">\n";
3108                 } else {
3109                         # advance raw git-diff output if needed
3110                         $patch_idx++ if defined $diffinfo;
3111
3112                         # compact combined diff output can have some patches skipped
3113                         # find which patch (using pathname of result) we are at now
3114                         my $to_name;
3115                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3116                                 $to_name = $1;
3117                         }
3118
3119                         do {
3120                                 # read and prepare patch information
3121                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3122                                         # pre-parsed (or generated by hand)
3123                                         $diffinfo = $difftree->[$patch_idx];
3124                                 } else {
3125                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3126                                 }
3127
3128                                 # check if current raw line has no patch (it got simplified)
3129                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3130                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3131                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3132                                               "</div>\n";  # class="patch"
3133
3134                                         $patch_idx++;
3135                                         $patch_number++;
3136                                 }
3137                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3138                                  $patch_idx > $#$difftree);
3139                         # modifies %from, %to hashes
3140                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3141                         if ($diffinfo->{'nparents'}) {
3142                                 # combined diff
3143                                 $from{'file'} = [];
3144                                 $from{'href'} = [];
3145                                 fill_from_file_info($diffinfo, @hash_parents)
3146                                         unless exists $diffinfo->{'from_file'};
3147                                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3148                                         $from{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
3149                                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3150                                                 $from{'href'}[$i] = href(action=>"blob",
3151                                                                          hash_base=>$hash_parents[$i],
3152                                                                          hash=>$diffinfo->{'from_id'}[$i],
3153                                                                          file_name=>$from{'file'}[$i]);
3154                                         } else {
3155                                                 $from{'href'}[$i] = undef;
3156                                         }
3157                                 }
3158                         } else {
3159                                 $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
3160                                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3161                                         $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3162                                                              hash=>$diffinfo->{'from_id'},
3163                                                              file_name=>$from{'file'});
3164                                 } else {
3165                                         delete $from{'href'};
3166                                 }
3167                         }
3168
3169                         $to{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
3170                         if (!is_deleted($diffinfo)) { # file exists in result
3171                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
3172                                                    hash=>$diffinfo->{'to_id'},
3173                                                    file_name=>$to{'file'});
3174                         } else {
3175                                 delete $to{'href'};
3176                         }
3177                         # this is first patch for raw difftree line with $patch_idx index
3178                         # we index @$difftree array from 0, but number patches from 1
3179                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3180                 }
3181
3182                 # print "git diff" header
3183                 $patch_line = shift @diff_header;
3184                 print format_git_diff_header_line($patch_line, $diffinfo,
3185                                                   \%from, \%to);
3186
3187                 # print extended diff header
3188                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3189         EXTENDED_HEADER:
3190                 foreach $patch_line (@diff_header) {
3191                         print format_extended_diff_header_line($patch_line, $diffinfo,
3192                                                                \%from, \%to);
3193                 }
3194                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3195
3196                 # from-file/to-file diff header
3197                 $patch_line = $last_patch_line;
3198                 if (! $patch_line) {
3199                         print "</div>\n"; # class="patch"
3200                         last PATCH;
3201                 }
3202                 next PATCH if ($patch_line =~ m/^diff /);
3203                 #assert($patch_line =~ m/^---/) if DEBUG;
3204                 #assert($patch_line eq $last_patch_line) if DEBUG;
3205
3206                 $patch_line = <$fd>;
3207                 chomp $patch_line;
3208                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3209
3210                 print format_diff_from_to_header($last_patch_line, $patch_line,
3211                                                  $diffinfo, \%from, \%to,
3212                                                  @hash_parents);
3213
3214                 # the patch itself
3215         LINE:
3216                 while ($patch_line = <$fd>) {
3217                         chomp $patch_line;
3218
3219                         next PATCH if ($patch_line =~ m/^diff /);
3220
3221                         print format_diff_line($patch_line, \%from, \%to);
3222                 }
3223
3224         } continue {
3225                 print "</div>\n"; # class="patch"
3226         }
3227
3228         # for compact combined (--cc) format, with chunk and patch simpliciaction
3229         # patchset might be empty, but there might be unprocessed raw lines
3230         for ($patch_idx++ if $patch_number > 0;
3231              $patch_idx < @$difftree;
3232              $patch_idx++) {
3233                 # read and prepare patch information
3234                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3235                         # pre-parsed (or generated by hand)
3236                         $diffinfo = $difftree->[$patch_idx];
3237                 } else {
3238                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3239                 }
3240
3241                 # generate anchor for "patch" links in difftree / whatchanged part
3242                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3243                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3244                       "</div>\n";  # class="patch"
3245
3246                 $patch_number++;
3247         }
3248
3249         if ($patch_number == 0) {
3250                 if (@hash_parents > 1) {
3251                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3252                 } else {
3253                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3254                 }
3255         }
3256
3257         print "</div>\n"; # class="patchset"
3258 }
3259
3260 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3261
3262 sub git_project_list_body {
3263         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3264
3265         my ($check_forks) = gitweb_check_feature('forks');
3266
3267         my @projects;
3268         foreach my $pr (@$projlist) {
3269                 my (@aa) = git_get_last_activity($pr->{'path'});
3270                 unless (@aa) {
3271                         next;
3272                 }
3273                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3274                 if (!defined $pr->{'descr'}) {
3275                         my $descr = git_get_project_description($pr->{'path'}) || "";
3276                         $pr->{'descr_long'} = to_utf8($descr);
3277                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3278                 }
3279                 if (!defined $pr->{'owner'}) {
3280                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3281                 }
3282                 if ($check_forks) {
3283                         my $pname = $pr->{'path'};
3284                         if (($pname =~ s/\.git$//) &&
3285                             ($pname !~ /\/$/) &&
3286                             (-d "$projectroot/$pname")) {
3287                                 $pr->{'forks'} = "-d $projectroot/$pname";
3288                         }
3289                         else {
3290                                 $pr->{'forks'} = 0;
3291                         }
3292                 }
3293                 push @projects, $pr;
3294         }
3295
3296         $order ||= $default_projects_order;
3297         $from = 0 unless defined $from;
3298         $to = $#projects if (!defined $to || $#projects < $to);
3299
3300         print "<table class=\"project_list\">\n";
3301         unless ($no_header) {
3302                 print "<tr>\n";
3303                 if ($check_forks) {
3304                         print "<th></th>\n";
3305                 }
3306                 if ($order eq "project") {
3307                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3308                         print "<th>Project</th>\n";
3309                 } else {
3310                         print "<th>" .
3311                               $cgi->a({-href => href(project=>undef, order=>'project'),
3312                                        -class => "header"}, "Project") .
3313                               "</th>\n";
3314                 }
3315                 if ($order eq "descr") {
3316                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3317                         print "<th>Description</th>\n";
3318                 } else {
3319                         print "<th>" .
3320                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3321                                        -class => "header"}, "Description") .
3322                               "</th>\n";
3323                 }
3324                 if ($order eq "owner") {
3325                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3326                         print "<th>Owner</th>\n";
3327                 } else {
3328                         print "<th>" .
3329                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3330                                        -class => "header"}, "Owner") .
3331                               "</th>\n";
3332                 }
3333                 if ($order eq "age") {
3334                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3335                         print "<th>Last Change</th>\n";
3336                 } else {
3337                         print "<th>" .
3338                               $cgi->a({-href => href(project=>undef, order=>'age'),
3339                                        -class => "header"}, "Last Change") .
3340                               "</th>\n";
3341                 }
3342                 print "<th></th>\n" .
3343                       "</tr>\n";
3344         }
3345         my $alternate = 1;
3346         for (my $i = $from; $i <= $to; $i++) {
3347                 my $pr = $projects[$i];
3348                 if ($alternate) {
3349                         print "<tr class=\"dark\">\n";
3350                 } else {
3351                         print "<tr class=\"light\">\n";
3352                 }
3353                 $alternate ^= 1;
3354                 if ($check_forks) {
3355                         print "<td>";
3356                         if ($pr->{'forks'}) {
3357                                 print "<!-- $pr->{'forks'} -->\n";
3358                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3359                         }
3360                         print "</td>\n";
3361                 }
3362                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3363                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3364                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3365                                         -class => "list", -title => $pr->{'descr_long'}},
3366                                         esc_html($pr->{'descr'})) . "</td>\n" .
3367                       "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
3368                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3369                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3370                       "<td class=\"link\">" .
3371                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3372                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3373                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3374                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3375                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3376                       "</td>\n" .
3377                       "</tr>\n";
3378         }
3379         if (defined $extra) {
3380                 print "<tr>\n";
3381                 if ($check_forks) {
3382                         print "<td></td>\n";
3383                 }
3384                 print "<td colspan=\"5\">$extra</td>\n" .
3385                       "</tr>\n";
3386         }
3387         print "</table>\n";
3388 }
3389
3390 sub git_shortlog_body {
3391         # uses global variable $project
3392         my ($commitlist, $from, $to, $refs, $extra) = @_;
3393
3394         $from = 0 unless defined $from;
3395         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3396
3397         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3398         my $alternate = 1;
3399         for (my $i = $from; $i <= $to; $i++) {
3400                 my %co = %{$commitlist->[$i]};
3401                 my $commit = $co{'id'};
3402                 my $ref = format_ref_marker($refs, $commit);
3403                 if ($alternate) {
3404                         print "<tr class=\"dark\">\n";
3405                 } else {
3406                         print "<tr class=\"light\">\n";
3407                 }
3408                 $alternate ^= 1;
3409                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3410                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3411                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3412                       "<td>";
3413                 print format_subject_html($co{'title'}, $co{'title_short'},
3414                                           href(action=>"commit", hash=>$commit), $ref);
3415                 print "</td>\n" .
3416                       "<td class=\"link\">" .
3417                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3418                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3419                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3420                 my $snapshot_links = format_snapshot_links($commit);
3421                 if (defined $snapshot_links) {
3422                         print " | " . $snapshot_links;
3423                 }
3424                 print "</td>\n" .
3425                       "</tr>\n";
3426         }
3427         if (defined $extra) {
3428                 print "<tr>\n" .
3429                       "<td colspan=\"4\">$extra</td>\n" .
3430                       "</tr>\n";
3431         }
3432         print "</table>\n";
3433 }
3434
3435 sub git_history_body {
3436         # Warning: assumes constant type (blob or tree) during history
3437         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3438
3439         $from = 0 unless defined $from;
3440         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3441
3442         print "<table class=\"history\" cellspacing=\"0\">\n";
3443         my $alternate = 1;
3444         for (my $i = $from; $i <= $to; $i++) {
3445                 my %co = %{$commitlist->[$i]};
3446                 if (!%co) {
3447                         next;
3448                 }
3449                 my $commit = $co{'id'};
3450
3451                 my $ref = format_ref_marker($refs, $commit);
3452
3453                 if ($alternate) {
3454                         print "<tr class=\"dark\">\n";
3455                 } else {
3456                         print "<tr class=\"light\">\n";
3457                 }
3458                 $alternate ^= 1;
3459                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3460                       # shortlog uses      chop_str($co{'author_name'}, 10)
3461                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3462                       "<td>";
3463                 # originally git_history used chop_str($co{'title'}, 50)
3464                 print format_subject_html($co{'title'}, $co{'title_short'},
3465                                           href(action=>"commit", hash=>$commit), $ref);
3466                 print "</td>\n" .
3467                       "<td class=\"link\">" .
3468                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3469                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3470
3471                 if ($ftype eq 'blob') {
3472                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3473                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3474                         if (defined $blob_current && defined $blob_parent &&
3475                                         $blob_current ne $blob_parent) {
3476                                 print " | " .
3477                                         $cgi->a({-href => href(action=>"blobdiff",
3478                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3479                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3480                                                                file_name=>$file_name)},
3481                                                 "diff to current");
3482                         }
3483                 }
3484                 print "</td>\n" .
3485                       "</tr>\n";
3486         }
3487         if (defined $extra) {
3488                 print "<tr>\n" .
3489                       "<td colspan=\"4\">$extra</td>\n" .
3490                       "</tr>\n";
3491         }
3492         print "</table>\n";
3493 }
3494
3495 sub git_tags_body {
3496         # uses global variable $project
3497         my ($taglist, $from, $to, $extra) = @_;
3498         $from = 0 unless defined $from;
3499         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3500
3501         print "<table class=\"tags\" cellspacing=\"0\">\n";
3502         my $alternate = 1;
3503         for (my $i = $from; $i <= $to; $i++) {
3504                 my $entry = $taglist->[$i];
3505                 my %tag = %$entry;
3506                 my $comment = $tag{'subject'};
3507                 my $comment_short;
3508                 if (defined $comment) {
3509                         $comment_short = chop_str($comment, 30, 5);
3510                 }
3511                 if ($alternate) {
3512                         print "<tr class=\"dark\">\n";
3513                 } else {
3514                         print "<tr class=\"light\">\n";
3515                 }
3516                 $alternate ^= 1;
3517                 if (defined $tag{'age'}) {
3518                         print "<td><i>$tag{'age'}</i></td>\n";
3519                 } else {
3520                         print "<td></td>\n";
3521                 }
3522                 print "<td>" .
3523                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3524                                -class => "list name"}, esc_html($tag{'name'})) .
3525                       "</td>\n" .
3526                       "<td>";
3527                 if (defined $comment) {
3528                         print format_subject_html($comment, $comment_short,
3529                                                   href(action=>"tag", hash=>$tag{'id'}));
3530                 }
3531                 print "</td>\n" .
3532                       "<td class=\"selflink\">";
3533                 if ($tag{'type'} eq "tag") {
3534                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3535                 } else {
3536                         print "&nbsp;";
3537                 }
3538                 print "</td>\n" .
3539                       "<td class=\"link\">" . " | " .
3540                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3541                 if ($tag{'reftype'} eq "commit") {
3542                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3543                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3544                 } elsif ($tag{'reftype'} eq "blob") {
3545                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3546                 }
3547                 print "</td>\n" .
3548                       "</tr>";
3549         }
3550         if (defined $extra) {
3551                 print "<tr>\n" .
3552                       "<td colspan=\"5\">$extra</td>\n" .
3553                       "</tr>\n";
3554         }
3555         print "</table>\n";
3556 }
3557
3558 sub git_heads_body {
3559         # uses global variable $project
3560         my ($headlist, $head, $from, $to, $extra) = @_;
3561         $from = 0 unless defined $from;
3562         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3563
3564         print "<table class=\"heads\" cellspacing=\"0\">\n";
3565         my $alternate = 1;
3566         for (my $i = $from; $i <= $to; $i++) {
3567                 my $entry = $headlist->[$i];
3568                 my %ref = %$entry;
3569                 my $curr = $ref{'id'} eq $head;
3570                 if ($alternate) {
3571                         print "<tr class=\"dark\">\n";
3572                 } else {
3573                         print "<tr class=\"light\">\n";
3574                 }
3575                 $alternate ^= 1;
3576                 print "<td><i>$ref{'age'}</i></td>\n" .
3577                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3578                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3579                                -class => "list name"},esc_html($ref{'name'})) .
3580                       "</td>\n" .
3581                       "<td class=\"link\">" .
3582                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3583                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3584                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3585                       "</td>\n" .
3586                       "</tr>";
3587         }
3588         if (defined $extra) {
3589                 print "<tr>\n" .
3590                       "<td colspan=\"3\">$extra</td>\n" .
3591                       "</tr>\n";
3592         }
3593         print "</table>\n";
3594 }
3595
3596 sub git_search_grep_body {
3597         my ($commitlist, $from, $to, $extra) = @_;
3598         $from = 0 unless defined $from;
3599         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3600
3601         print "<table class=\"grep\" cellspacing=\"0\">\n";
3602         my $alternate = 1;
3603         for (my $i = $from; $i <= $to; $i++) {
3604                 my %co = %{$commitlist->[$i]};
3605                 if (!%co) {
3606                         next;
3607                 }
3608                 my $commit = $co{'id'};
3609                 if ($alternate) {
3610                         print "<tr class=\"dark\">\n";
3611                 } else {
3612                         print "<tr class=\"light\">\n";
3613                 }
3614                 $alternate ^= 1;
3615                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3616                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3617                       "<td>" .
3618                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3619                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3620                 my $comment = $co{'comment'};
3621                 foreach my $line (@$comment) {
3622                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3623                                 my $lead = esc_html($1) || "";
3624                                 $lead = chop_str($lead, 30, 10);
3625                                 my $match = esc_html($2) || "";
3626                                 my $trail = esc_html($3) || "";
3627                                 $trail = chop_str($trail, 30, 10);
3628                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3629                                 print chop_str($text, 80, 5) . "<br/>\n";
3630                         }
3631                 }
3632                 print "</td>\n" .
3633                       "<td class=\"link\">" .
3634                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3635                       " | " .
3636                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3637                 print "</td>\n" .
3638                       "</tr>\n";
3639         }
3640         if (defined $extra) {
3641                 print "<tr>\n" .
3642                       "<td colspan=\"3\">$extra</td>\n" .
3643                       "</tr>\n";
3644         }
3645         print "</table>\n";
3646 }
3647
3648 ## ======================================================================
3649 ## ======================================================================
3650 ## actions
3651
3652 sub git_project_list {
3653         my $order = $cgi->param('o');
3654         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3655                 die_error(undef, "Unknown order parameter");
3656         }
3657
3658         my @list = git_get_projects_list();
3659         if (!@list) {
3660                 die_error(undef, "No projects found");
3661         }
3662
3663         git_header_html();
3664         if (-f $home_text) {
3665                 print "<div class=\"index_include\">\n";
3666                 open (my $fd, $home_text);
3667                 print <$fd>;
3668                 close $fd;
3669                 print "</div>\n";
3670         }
3671         git_project_list_body(\@list, $order);
3672         git_footer_html();
3673 }
3674
3675 sub git_forks {
3676         my $order = $cgi->param('o');
3677         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3678                 die_error(undef, "Unknown order parameter");
3679         }
3680
3681         my @list = git_get_projects_list($project);
3682         if (!@list) {
3683                 die_error(undef, "No forks found");
3684         }
3685
3686         git_header_html();
3687         git_print_page_nav('','');
3688         git_print_header_div('summary', "$project forks");
3689         git_project_list_body(\@list, $order);
3690         git_footer_html();
3691 }
3692
3693 sub git_project_index {
3694         my @projects = git_get_projects_list($project);
3695
3696         print $cgi->header(
3697                 -type => 'text/plain',
3698                 -charset => 'utf-8',
3699                 -content_disposition => 'inline; filename="index.aux"');
3700
3701         foreach my $pr (@projects) {
3702                 if (!exists $pr->{'owner'}) {
3703                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3704                 }
3705
3706                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3707                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3708                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3709                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3710                 $path  =~ s/ /\+/g;
3711                 $owner =~ s/ /\+/g;
3712
3713                 print "$path $owner\n";
3714         }
3715 }
3716
3717 sub git_summary {
3718         my $descr = git_get_project_description($project) || "none";
3719         my %co = parse_commit("HEAD");
3720         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3721         my $head = $co{'id'};
3722
3723         my $owner = git_get_project_owner($project);
3724
3725         my $refs = git_get_references();
3726         # These get_*_list functions return one more to allow us to see if
3727         # there are more ...
3728         my @taglist  = git_get_tags_list(16);
3729         my @headlist = git_get_heads_list(16);
3730         my @forklist;
3731         my ($check_forks) = gitweb_check_feature('forks');
3732
3733         if ($check_forks) {
3734                 @forklist = git_get_projects_list($project);
3735         }
3736
3737         git_header_html();
3738         git_print_page_nav('summary','', $head);
3739
3740         print "<div class=\"title\">&nbsp;</div>\n";
3741         print "<table cellspacing=\"0\">\n" .
3742               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3743               "<tr><td>owner</td><td>$owner</td></tr>\n";
3744         if (defined $cd{'rfc2822'}) {
3745                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3746         }
3747
3748         # use per project git URL list in $projectroot/$project/cloneurl
3749         # or make project git URL from git base URL and project name
3750         my $url_tag = "URL";
3751         my @url_list = git_get_project_url_list($project);
3752         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3753         foreach my $git_url (@url_list) {
3754                 next unless $git_url;
3755                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3756                 $url_tag = "";
3757         }
3758         print "</table>\n";
3759
3760         if (-s "$projectroot/$project/README.html") {
3761                 if (open my $fd, "$projectroot/$project/README.html") {
3762                         print "<div class=\"title\">readme</div>\n";
3763                         print $_ while (<$fd>);
3764                         close $fd;
3765                 }
3766         }
3767
3768         # we need to request one more than 16 (0..15) to check if
3769         # those 16 are all
3770         my @commitlist = $head ? parse_commits($head, 17) : ();
3771         if (@commitlist) {
3772                 git_print_header_div('shortlog');
3773                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3774                                   $#commitlist <=  15 ? undef :
3775                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3776         }
3777
3778         if (@taglist) {
3779                 git_print_header_div('tags');
3780                 git_tags_body(\@taglist, 0, 15,
3781                               $#taglist <=  15 ? undef :
3782                               $cgi->a({-href => href(action=>"tags")}, "..."));
3783         }
3784
3785         if (@headlist) {
3786                 git_print_header_div('heads');
3787                 git_heads_body(\@headlist, $head, 0, 15,
3788                                $#headlist <= 15 ? undef :
3789                                $cgi->a({-href => href(action=>"heads")}, "..."));
3790         }
3791
3792         if (@forklist) {
3793                 git_print_header_div('forks');
3794                 git_project_list_body(\@forklist, undef, 0, 15,
3795                                       $#forklist <= 15 ? undef :
3796                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3797                                       'noheader');
3798         }
3799
3800         git_footer_html();
3801 }
3802
3803 sub git_tag {
3804         my $head = git_get_head_hash($project);
3805         git_header_html();
3806         git_print_page_nav('','', $head,undef,$head);
3807         my %tag = parse_tag($hash);
3808
3809         if (! %tag) {
3810                 die_error(undef, "Unknown tag object");
3811         }
3812
3813         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3814         print "<div class=\"title_text\">\n" .
3815               "<table cellspacing=\"0\">\n" .
3816               "<tr>\n" .
3817               "<td>object</td>\n" .
3818               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3819                                $tag{'object'}) . "</td>\n" .
3820               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3821                                               $tag{'type'}) . "</td>\n" .
3822               "</tr>\n";
3823         if (defined($tag{'author'})) {
3824                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3825                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3826                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3827                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3828                         "</td></tr>\n";
3829         }
3830         print "</table>\n\n" .
3831               "</div>\n";
3832         print "<div class=\"page_body\">";
3833         my $comment = $tag{'comment'};
3834         foreach my $line (@$comment) {
3835                 chomp $line;
3836                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3837         }
3838         print "</div>\n";
3839         git_footer_html();
3840 }
3841
3842 sub git_blame2 {
3843         my $fd;
3844         my $ftype;
3845
3846         my ($have_blame) = gitweb_check_feature('blame');
3847         if (!$have_blame) {
3848                 die_error('403 Permission denied', "Permission denied");
3849         }
3850         die_error('404 Not Found', "File name not defined") if (!$file_name);
3851         $hash_base ||= git_get_head_hash($project);
3852         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3853         my %co = parse_commit($hash_base)
3854                 or die_error(undef, "Reading commit failed");
3855         if (!defined $hash) {
3856                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3857                         or die_error(undef, "Error looking up file");
3858         }
3859         $ftype = git_get_type($hash);
3860         if ($ftype !~ "blob") {
3861                 die_error('400 Bad Request', "Object is not a blob");
3862         }
3863         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3864               $file_name, $hash_base)
3865                 or die_error(undef, "Open git-blame failed");
3866         git_header_html();
3867         my $formats_nav =
3868                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3869                         "blob") .
3870                 " | " .
3871                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3872                         "history") .
3873                 " | " .
3874                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3875                         "HEAD");
3876         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3877         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3878         git_print_page_path($file_name, $ftype, $hash_base);
3879         my @rev_color = (qw(light2 dark2));
3880         my $num_colors = scalar(@rev_color);
3881         my $current_color = 0;
3882         my $last_rev;
3883         print <<HTML;
3884 <div class="page_body">
3885 <table class="blame">
3886 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3887 HTML
3888         my %metainfo = ();
3889         while (1) {
3890                 $_ = <$fd>;
3891                 last unless defined $_;
3892                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3893                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3894                 if (!exists $metainfo{$full_rev}) {
3895                         $metainfo{$full_rev} = {};
3896                 }
3897                 my $meta = $metainfo{$full_rev};
3898                 while (<$fd>) {
3899                         last if (s/^\t//);
3900                         if (/^(\S+) (.*)$/) {
3901                                 $meta->{$1} = $2;
3902                         }
3903                 }
3904                 my $data = $_;
3905                 chomp $data;
3906                 my $rev = substr($full_rev, 0, 8);
3907                 my $author = $meta->{'author'};
3908                 my %date = parse_date($meta->{'author-time'},
3909                                       $meta->{'author-tz'});
3910                 my $date = $date{'iso-tz'};
3911                 if ($group_size) {
3912                         $current_color = ++$current_color % $num_colors;
3913                 }
3914                 print "<tr class=\"$rev_color[$current_color]\">\n";
3915                 if ($group_size) {
3916                         print "<td class=\"sha1\"";
3917                         print " title=\"". esc_html($author) . ", $date\"";
3918                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3919                         print ">";
3920                         print $cgi->a({-href => href(action=>"commit",
3921                                                      hash=>$full_rev,
3922                                                      file_name=>$file_name)},
3923                                       esc_html($rev));
3924                         print "</td>\n";
3925                 }
3926                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3927                         or die_error(undef, "Open git-rev-parse failed");
3928                 my $parent_commit = <$dd>;
3929                 close $dd;
3930                 chomp($parent_commit);
3931                 my $blamed = href(action => 'blame',
3932                                   file_name => $meta->{'filename'},
3933                                   hash_base => $parent_commit);
3934                 print "<td class=\"linenr\">";
3935                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3936                                 -id => "l$lineno",
3937                                 -class => "linenr" },
3938                               esc_html($lineno));
3939                 print "</td>";
3940                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3941                 print "</tr>\n";
3942         }
3943         print "</table>\n";
3944         print "</div>";
3945         close $fd
3946                 or print "Reading blob failed\n";
3947         git_footer_html();
3948 }
3949
3950 sub git_blame {
3951         my $fd;
3952
3953         my ($have_blame) = gitweb_check_feature('blame');
3954         if (!$have_blame) {
3955                 die_error('403 Permission denied', "Permission denied");
3956         }
3957         die_error('404 Not Found', "File name not defined") if (!$file_name);
3958         $hash_base ||= git_get_head_hash($project);
3959         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3960         my %co = parse_commit($hash_base)
3961                 or die_error(undef, "Reading commit failed");
3962         if (!defined $hash) {
3963                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3964                         or die_error(undef, "Error lookup file");
3965         }
3966         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
3967                 or die_error(undef, "Open git-annotate failed");
3968         git_header_html();
3969         my $formats_nav =
3970                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3971                         "blob") .
3972                 " | " .
3973                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3974                         "history") .
3975                 " | " .
3976                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3977                         "HEAD");
3978         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3979         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3980         git_print_page_path($file_name, 'blob', $hash_base);
3981         print "<div class=\"page_body\">\n";
3982         print <<HTML;
3983 <table class="blame">
3984   <tr>
3985     <th>Commit</th>
3986     <th>Age</th>
3987     <th>Author</th>
3988     <th>Line</th>
3989     <th>Data</th>
3990   </tr>
3991 HTML
3992         my @line_class = (qw(light dark));
3993         my $line_class_len = scalar (@line_class);
3994         my $line_class_num = $#line_class;
3995         while (my $line = <$fd>) {
3996                 my $long_rev;
3997                 my $short_rev;
3998                 my $author;
3999                 my $time;
4000                 my $lineno;
4001                 my $data;
4002                 my $age;
4003                 my $age_str;
4004                 my $age_class;
4005
4006                 chomp $line;
4007                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4008
4009                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4010                         $long_rev = $1;
4011                         $author   = $2;
4012                         $time     = $3;
4013                         $lineno   = $4;
4014                         $data     = $5;
4015                 } else {
4016                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4017                         next;
4018                 }
4019                 $short_rev  = substr ($long_rev, 0, 8);
4020                 $age        = time () - $time;
4021                 $age_str    = age_string ($age);
4022                 $age_str    =~ s/ /&nbsp;/g;
4023                 $age_class  = age_class($age);
4024                 $author     = esc_html ($author);
4025                 $author     =~ s/ /&nbsp;/g;
4026
4027                 $data = untabify($data);
4028                 $data = esc_html ($data);
4029
4030                 print <<HTML;
4031   <tr class="$line_class[$line_class_num]">
4032     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4033     <td class="$age_class">$age_str</td>
4034     <td>$author</td>
4035     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4036     <td class="pre">$data</td>
4037   </tr>
4038 HTML
4039         } # while (my $line = <$fd>)
4040         print "</table>\n\n";
4041         close $fd
4042                 or print "Reading blob failed.\n";
4043         print "</div>";
4044         git_footer_html();
4045 }
4046
4047 sub git_tags {
4048         my $head = git_get_head_hash($project);
4049         git_header_html();
4050         git_print_page_nav('','', $head,undef,$head);
4051         git_print_header_div('summary', $project);
4052
4053         my @tagslist = git_get_tags_list();
4054         if (@tagslist) {
4055                 git_tags_body(\@tagslist);
4056         }
4057         git_footer_html();
4058 }
4059
4060 sub git_heads {
4061         my $head = git_get_head_hash($project);
4062         git_header_html();
4063         git_print_page_nav('','', $head,undef,$head);
4064         git_print_header_div('summary', $project);
4065
4066         my @headslist = git_get_heads_list();
4067         if (@headslist) {
4068                 git_heads_body(\@headslist, $head);
4069         }
4070         git_footer_html();
4071 }
4072
4073 sub git_blob_plain {
4074         my $expires;
4075
4076         if (!defined $hash) {
4077                 if (defined $file_name) {
4078                         my $base = $hash_base || git_get_head_hash($project);
4079                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4080                                 or die_error(undef, "Error lookup file");
4081                 } else {
4082                         die_error(undef, "No file name defined");
4083                 }
4084         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4085                 # blobs defined by non-textual hash id's can be cached
4086                 $expires = "+1d";
4087         }
4088
4089         my $type = shift;
4090         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4091                 or die_error(undef, "Couldn't cat $file_name, $hash");
4092
4093         $type ||= blob_mimetype($fd, $file_name);
4094
4095         # save as filename, even when no $file_name is given
4096         my $save_as = "$hash";
4097         if (defined $file_name) {
4098                 $save_as = $file_name;
4099         } elsif ($type =~ m/^text\//) {
4100                 $save_as .= '.txt';
4101         }
4102
4103         print $cgi->header(
4104                 -type => "$type",
4105                 -expires=>$expires,
4106                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4107         undef $/;
4108         binmode STDOUT, ':raw';
4109         print <$fd>;
4110         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4111         $/ = "\n";
4112         close $fd;
4113 }
4114
4115 sub git_blob {
4116         my $expires;
4117
4118         if (!defined $hash) {
4119                 if (defined $file_name) {
4120                         my $base = $hash_base || git_get_head_hash($project);
4121                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4122                                 or die_error(undef, "Error lookup file");
4123                 } else {
4124                         die_error(undef, "No file name defined");
4125                 }
4126         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4127                 # blobs defined by non-textual hash id's can be cached
4128                 $expires = "+1d";
4129         }
4130
4131         my ($have_blame) = gitweb_check_feature('blame');
4132         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4133                 or die_error(undef, "Couldn't cat $file_name, $hash");
4134         my $mimetype = blob_mimetype($fd, $file_name);
4135         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4136                 close $fd;
4137                 return git_blob_plain($mimetype);
4138         }
4139         # we can have blame only for text/* mimetype
4140         $have_blame &&= ($mimetype =~ m!^text/!);
4141
4142         git_header_html(undef, $expires);
4143         my $formats_nav = '';
4144         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4145                 if (defined $file_name) {
4146                         if ($have_blame) {
4147                                 $formats_nav .=
4148                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4149                                                                hash=>$hash, file_name=>$file_name)},
4150                                                 "blame") .
4151                                         " | ";
4152                         }
4153                         $formats_nav .=
4154                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4155                                                        hash=>$hash, file_name=>$file_name)},
4156                                         "history") .
4157                                 " | " .
4158                                 $cgi->a({-href => href(action=>"blob_plain",
4159                                                        hash=>$hash, file_name=>$file_name)},
4160                                         "raw") .
4161                                 " | " .
4162                                 $cgi->a({-href => href(action=>"blob",
4163                                                        hash_base=>"HEAD", file_name=>$file_name)},
4164                                         "HEAD");
4165                 } else {
4166                         $formats_nav .=
4167                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4168                 }
4169                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4170                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4171         } else {
4172                 print "<div class=\"page_nav\">\n" .
4173                       "<br/><br/></div>\n" .
4174                       "<div class=\"title\">$hash</div>\n";
4175         }
4176         git_print_page_path($file_name, "blob", $hash_base);
4177         print "<div class=\"page_body\">\n";
4178         if ($mimetype =~ m!^text/!) {
4179                 my $nr;
4180                 while (my $line = <$fd>) {
4181                         chomp $line;
4182                         $nr++;
4183                         $line = untabify($line);
4184                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4185                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4186                 }
4187         } elsif ($mimetype =~ m!^image/!) {
4188                 print qq!<img type="$mimetype"!;
4189                 if ($file_name) {
4190                         print qq! alt="$file_name" title="$file_name"!;
4191                 }
4192                 print qq! src="! .
4193                       href(action=>"blob_plain", hash=>$hash,
4194                            hash_base=>$hash_base, file_name=>$file_name) .
4195                       qq!" />\n!;
4196         }
4197         close $fd
4198                 or print "Reading blob failed.\n";
4199         print "</div>";
4200         git_footer_html();
4201 }
4202
4203 sub git_tree {
4204         if (!defined $hash_base) {
4205                 $hash_base = "HEAD";
4206         }
4207         if (!defined $hash) {
4208                 if (defined $file_name) {
4209                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4210                 } else {
4211                         $hash = $hash_base;
4212                 }
4213         }
4214         $/ = "\0";
4215         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4216                 or die_error(undef, "Open git-ls-tree failed");
4217         my @entries = map { chomp; $_ } <$fd>;
4218         close $fd or die_error(undef, "Reading tree failed");
4219         $/ = "\n";
4220
4221         my $refs = git_get_references();
4222         my $ref = format_ref_marker($refs, $hash_base);
4223         git_header_html();
4224         my $basedir = '';
4225         my ($have_blame) = gitweb_check_feature('blame');
4226         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4227                 my @views_nav = ();
4228                 if (defined $file_name) {
4229                         push @views_nav,
4230                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4231                                                        hash=>$hash, file_name=>$file_name)},
4232                                         "history"),
4233                                 $cgi->a({-href => href(action=>"tree",
4234                                                        hash_base=>"HEAD", file_name=>$file_name)},
4235                                         "HEAD"),
4236                 }
4237                 my $snapshot_links = format_snapshot_links($hash);
4238                 if (defined $snapshot_links) {
4239                         # FIXME: Should be available when we have no hash base as well.
4240                         push @views_nav, $snapshot_links;
4241                 }
4242                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4243                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4244         } else {
4245                 undef $hash_base;
4246                 print "<div class=\"page_nav\">\n";
4247                 print "<br/><br/></div>\n";
4248                 print "<div class=\"title\">$hash</div>\n";
4249         }
4250         if (defined $file_name) {
4251                 $basedir = $file_name;
4252                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4253                         $basedir .= '/';
4254                 }
4255         }
4256         git_print_page_path($file_name, 'tree', $hash_base);
4257         print "<div class=\"page_body\">\n";
4258         print "<table cellspacing=\"0\">\n";
4259         my $alternate = 1;
4260         # '..' (top directory) link if possible
4261         if (defined $hash_base &&
4262             defined $file_name && $file_name =~ m![^/]+$!) {
4263                 if ($alternate) {
4264                         print "<tr class=\"dark\">\n";
4265                 } else {
4266                         print "<tr class=\"light\">\n";
4267                 }
4268                 $alternate ^= 1;
4269
4270                 my $up = $file_name;
4271                 $up =~ s!/?[^/]+$!!;
4272                 undef $up unless $up;
4273                 # based on git_print_tree_entry
4274                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4275                 print '<td class="list">';
4276                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4277                                              file_name=>$up)},
4278                               "..");
4279                 print "</td>\n";
4280                 print "<td class=\"link\"></td>\n";
4281
4282                 print "</tr>\n";
4283         }
4284         foreach my $line (@entries) {
4285                 my %t = parse_ls_tree_line($line, -z => 1);
4286
4287                 if ($alternate) {
4288                         print "<tr class=\"dark\">\n";
4289                 } else {
4290                         print "<tr class=\"light\">\n";
4291                 }
4292                 $alternate ^= 1;
4293
4294                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4295
4296                 print "</tr>\n";
4297         }
4298         print "</table>\n" .
4299               "</div>";
4300         git_footer_html();
4301 }
4302
4303 sub git_snapshot {
4304         my @supported_fmts = gitweb_check_feature('snapshot');
4305
4306         my $format = $cgi->param('sf');
4307         unless ($format =~ m/[a-z0-9]+/
4308                 && exists($known_snapshot_formats{$format})
4309                 && grep($_ eq $format, @supported_fmts)) {
4310                 die_error(undef, "Unsupported snapshot format");
4311         }
4312
4313         if (!defined $hash) {
4314                 $hash = git_get_head_hash($project);
4315         }
4316
4317         my $git_command = git_cmd_str();
4318         my $name = $project;
4319         $name =~ s,([^/])/*\.git$,$1,;
4320         $name = basename($name);
4321         my $filename = to_utf8($name);
4322         $name =~ s/\047/\047\\\047\047/g;
4323         my $cmd;
4324         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4325         $cmd = "$git_command archive " .
4326                 "--format=$known_snapshot_formats{$format}{'format'}" .
4327                 "--prefix=\'$name\'/ $hash";
4328         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4329                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4330         }
4331
4332         print $cgi->header(
4333                 -type => $known_snapshot_formats{$format}{'type'},
4334                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4335                 -status => '200 OK');
4336
4337         open my $fd, "-|", $cmd
4338                 or die_error(undef, "Execute git-archive failed");
4339         binmode STDOUT, ':raw';
4340         print <$fd>;
4341         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4342         close $fd;
4343 }
4344
4345 sub git_log {
4346         my $head = git_get_head_hash($project);
4347         if (!defined $hash) {
4348                 $hash = $head;
4349         }
4350         if (!defined $page) {
4351                 $page = 0;
4352         }
4353         my $refs = git_get_references();
4354
4355         my @commitlist = parse_commits($hash, 101, (100 * $page));
4356
4357         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4358
4359         git_header_html();
4360         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4361
4362         if (!@commitlist) {
4363                 my %co = parse_commit($hash);
4364
4365                 git_print_header_div('summary', $project);
4366                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4367         }
4368         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4369         for (my $i = 0; $i <= $to; $i++) {
4370                 my %co = %{$commitlist[$i]};
4371                 next if !%co;
4372                 my $commit = $co{'id'};
4373                 my $ref = format_ref_marker($refs, $commit);
4374                 my %ad = parse_date($co{'author_epoch'});
4375                 git_print_header_div('commit',
4376                                "<span class=\"age\">$co{'age_string'}</span>" .
4377                                esc_html($co{'title'}) . $ref,
4378                                $commit);
4379                 print "<div class=\"title_text\">\n" .
4380                       "<div class=\"log_link\">\n" .
4381                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4382                       " | " .
4383                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4384                       " | " .
4385                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4386                       "<br/>\n" .
4387                       "</div>\n" .
4388                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4389                       "</div>\n";
4390
4391                 print "<div class=\"log_body\">\n";
4392                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4393                 print "</div>\n";
4394         }
4395         if ($#commitlist >= 100) {
4396                 print "<div class=\"page_nav\">\n";
4397                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4398                                -accesskey => "n", -title => "Alt-n"}, "next");
4399                 print "</div>\n";
4400         }
4401         git_footer_html();
4402 }
4403
4404 sub git_commit {
4405         $hash ||= $hash_base || "HEAD";
4406         my %co = parse_commit($hash);
4407         if (!%co) {
4408                 die_error(undef, "Unknown commit object");
4409         }
4410         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4411         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4412
4413         my $parent  = $co{'parent'};
4414         my $parents = $co{'parents'}; # listref
4415
4416         # we need to prepare $formats_nav before any parameter munging
4417         my $formats_nav;
4418         if (!defined $parent) {
4419                 # --root commitdiff
4420                 $formats_nav .= '(initial)';
4421         } elsif (@$parents == 1) {
4422                 # single parent commit
4423                 $formats_nav .=
4424                         '(parent: ' .
4425                         $cgi->a({-href => href(action=>"commit",
4426                                                hash=>$parent)},
4427                                 esc_html(substr($parent, 0, 7))) .
4428                         ')';
4429         } else {
4430                 # merge commit
4431                 $formats_nav .=
4432                         '(merge: ' .
4433                         join(' ', map {
4434                                 $cgi->a({-href => href(action=>"commit",
4435                                                        hash=>$_)},
4436                                         esc_html(substr($_, 0, 7)));
4437                         } @$parents ) .
4438                         ')';
4439         }
4440
4441         if (!defined $parent) {
4442                 $parent = "--root";
4443         }
4444         my @difftree;
4445         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4446                 @diff_opts,
4447                 (@$parents <= 1 ? $parent : '-c'),
4448                 $hash, "--"
4449                 or die_error(undef, "Open git-diff-tree failed");
4450         @difftree = map { chomp; $_ } <$fd>;
4451         close $fd or die_error(undef, "Reading git-diff-tree failed");
4452
4453         # non-textual hash id's can be cached
4454         my $expires;
4455         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4456                 $expires = "+1d";
4457         }
4458         my $refs = git_get_references();
4459         my $ref = format_ref_marker($refs, $co{'id'});
4460
4461         git_header_html(undef, $expires);
4462         git_print_page_nav('commit', '',
4463                            $hash, $co{'tree'}, $hash,
4464                            $formats_nav);
4465
4466         if (defined $co{'parent'}) {
4467                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4468         } else {
4469                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4470         }
4471         print "<div class=\"title_text\">\n" .
4472               "<table cellspacing=\"0\">\n";
4473         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4474               "<tr>" .
4475               "<td></td><td> $ad{'rfc2822'}";
4476         if ($ad{'hour_local'} < 6) {
4477                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4478                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4479         } else {
4480                 printf(" (%02d:%02d %s)",
4481                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4482         }
4483         print "</td>" .
4484               "</tr>\n";
4485         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4486         print "<tr><td></td><td> $cd{'rfc2822'}" .
4487               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4488               "</td></tr>\n";
4489         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4490         print "<tr>" .
4491               "<td>tree</td>" .
4492               "<td class=\"sha1\">" .
4493               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4494                        class => "list"}, $co{'tree'}) .
4495               "</td>" .
4496               "<td class=\"link\">" .
4497               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4498                       "tree");
4499         my $snapshot_links = format_snapshot_links($hash);
4500         if (defined $snapshot_links) {
4501                 print " | " . $snapshot_links;
4502         }
4503         print "</td>" .
4504               "</tr>\n";
4505
4506         foreach my $par (@$parents) {
4507                 print "<tr>" .
4508                       "<td>parent</td>" .
4509                       "<td class=\"sha1\">" .
4510                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4511                                class => "list"}, $par) .
4512                       "</td>" .
4513                       "<td class=\"link\">" .
4514                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4515                       " | " .
4516                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4517                       "</td>" .
4518                       "</tr>\n";
4519         }
4520         print "</table>".
4521               "</div>\n";
4522
4523         print "<div class=\"page_body\">\n";
4524         git_print_log($co{'comment'});
4525         print "</div>\n";
4526
4527         git_difftree_body(\@difftree, $hash, @$parents);
4528
4529         git_footer_html();
4530 }
4531
4532 sub git_object {
4533         # object is defined by:
4534         # - hash or hash_base alone
4535         # - hash_base and file_name
4536         my $type;
4537
4538         # - hash or hash_base alone
4539         if ($hash || ($hash_base && !defined $file_name)) {
4540                 my $object_id = $hash || $hash_base;
4541
4542                 my $git_command = git_cmd_str();
4543                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4544                         or die_error('404 Not Found', "Object does not exist");
4545                 $type = <$fd>;
4546                 chomp $type;
4547                 close $fd
4548                         or die_error('404 Not Found', "Object does not exist");
4549
4550         # - hash_base and file_name
4551         } elsif ($hash_base && defined $file_name) {
4552                 $file_name =~ s,/+$,,;
4553
4554                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4555                         or die_error('404 Not Found', "Base object does not exist");
4556
4557                 # here errors should not hapen
4558                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4559                         or die_error(undef, "Open git-ls-tree failed");
4560                 my $line = <$fd>;
4561                 close $fd;
4562
4563                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4564                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4565                         die_error('404 Not Found', "File or directory for given base does not exist");
4566                 }
4567                 $type = $2;
4568                 $hash = $3;
4569         } else {
4570                 die_error('404 Not Found', "Not enough information to find object");
4571         }
4572
4573         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4574                                           hash=>$hash, hash_base=>$hash_base,
4575                                           file_name=>$file_name),
4576                              -status => '302 Found');
4577 }
4578
4579 sub git_blobdiff {
4580         my $format = shift || 'html';
4581
4582         my $fd;
4583         my @difftree;
4584         my %diffinfo;
4585         my $expires;
4586
4587         # preparing $fd and %diffinfo for git_patchset_body
4588         # new style URI
4589         if (defined $hash_base && defined $hash_parent_base) {
4590                 if (defined $file_name) {
4591                         # read raw output
4592                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4593                                 $hash_parent_base, $hash_base,
4594                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4595                                 or die_error(undef, "Open git-diff-tree failed");
4596                         @difftree = map { chomp; $_ } <$fd>;
4597                         close $fd
4598                                 or die_error(undef, "Reading git-diff-tree failed");
4599                         @difftree
4600                                 or die_error('404 Not Found', "Blob diff not found");
4601
4602                 } elsif (defined $hash &&
4603                          $hash =~ /[0-9a-fA-F]{40}/) {
4604                         # try to find filename from $hash
4605
4606                         # read filtered raw output
4607                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4608                                 $hash_parent_base, $hash_base, "--"
4609                                 or die_error(undef, "Open git-diff-tree failed");
4610                         @difftree =
4611                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4612                                 # $hash == to_id
4613                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4614                                 map { chomp; $_ } <$fd>;
4615                         close $fd
4616                                 or die_error(undef, "Reading git-diff-tree failed");
4617                         @difftree
4618                                 or die_error('404 Not Found', "Blob diff not found");
4619
4620                 } else {
4621                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4622                 }
4623
4624                 if (@difftree > 1) {
4625                         die_error('404 Not Found', "Ambiguous blob diff specification");
4626                 }
4627
4628                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4629                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4630                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4631
4632                 $hash_parent ||= $diffinfo{'from_id'};
4633                 $hash        ||= $diffinfo{'to_id'};
4634
4635                 # non-textual hash id's can be cached
4636                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4637                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4638                         $expires = '+1d';
4639                 }
4640
4641                 # open patch output
4642                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4643                         '-p', ($format eq 'html' ? "--full-index" : ()),
4644                         $hash_parent_base, $hash_base,
4645                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4646                         or die_error(undef, "Open git-diff-tree failed");
4647         }
4648
4649         # old/legacy style URI
4650         if (!%diffinfo && # if new style URI failed
4651             defined $hash && defined $hash_parent) {
4652                 # fake git-diff-tree raw output
4653                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4654                 $diffinfo{'from_id'} = $hash_parent;
4655                 $diffinfo{'to_id'}   = $hash;
4656                 if (defined $file_name) {
4657                         if (defined $file_parent) {
4658                                 $diffinfo{'status'} = '2';
4659                                 $diffinfo{'from_file'} = $file_parent;
4660                                 $diffinfo{'to_file'}   = $file_name;
4661                         } else { # assume not renamed
4662                                 $diffinfo{'status'} = '1';
4663                                 $diffinfo{'from_file'} = $file_name;
4664                                 $diffinfo{'to_file'}   = $file_name;
4665                         }
4666                 } else { # no filename given
4667                         $diffinfo{'status'} = '2';
4668                         $diffinfo{'from_file'} = $hash_parent;
4669                         $diffinfo{'to_file'}   = $hash;
4670                 }
4671
4672                 # non-textual hash id's can be cached
4673                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4674                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4675                         $expires = '+1d';
4676                 }
4677
4678                 # open patch output
4679                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4680                         '-p', ($format eq 'html' ? "--full-index" : ()),
4681                         $hash_parent, $hash, "--"
4682                         or die_error(undef, "Open git-diff failed");
4683         } else  {
4684                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4685                         unless %diffinfo;
4686         }
4687
4688         # header
4689         if ($format eq 'html') {
4690                 my $formats_nav =
4691                         $cgi->a({-href => href(action=>"blobdiff_plain",
4692                                                hash=>$hash, hash_parent=>$hash_parent,
4693                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4694                                                file_name=>$file_name, file_parent=>$file_parent)},
4695                                 "raw");
4696                 git_header_html(undef, $expires);
4697                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4698                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4699                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4700                 } else {
4701                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4702                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4703                 }
4704                 if (defined $file_name) {
4705                         git_print_page_path($file_name, "blob", $hash_base);
4706                 } else {
4707                         print "<div class=\"page_path\"></div>\n";
4708                 }
4709
4710         } elsif ($format eq 'plain') {
4711                 print $cgi->header(
4712                         -type => 'text/plain',
4713                         -charset => 'utf-8',
4714                         -expires => $expires,
4715                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4716
4717                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4718
4719         } else {
4720                 die_error(undef, "Unknown blobdiff format");
4721         }
4722
4723         # patch
4724         if ($format eq 'html') {
4725                 print "<div class=\"page_body\">\n";
4726
4727                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4728                 close $fd;
4729
4730                 print "</div>\n"; # class="page_body"
4731                 git_footer_html();
4732
4733         } else {
4734                 while (my $line = <$fd>) {
4735                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4736                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4737
4738                         print $line;
4739
4740                         last if $line =~ m!^\+\+\+!;
4741                 }
4742                 local $/ = undef;
4743                 print <$fd>;
4744                 close $fd;
4745         }
4746 }
4747
4748 sub git_blobdiff_plain {
4749         git_blobdiff('plain');
4750 }
4751
4752 sub git_commitdiff {
4753         my $format = shift || 'html';
4754         $hash ||= $hash_base || "HEAD";
4755         my %co = parse_commit($hash);
4756         if (!%co) {
4757                 die_error(undef, "Unknown commit object");
4758         }
4759
4760         # choose format for commitdiff for merge
4761         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4762                 $hash_parent = '--cc';
4763         }
4764         # we need to prepare $formats_nav before almost any parameter munging
4765         my $formats_nav;
4766         if ($format eq 'html') {
4767                 $formats_nav =
4768                         $cgi->a({-href => href(action=>"commitdiff_plain",
4769                                                hash=>$hash, hash_parent=>$hash_parent)},
4770                                 "raw");
4771
4772                 if (defined $hash_parent &&
4773                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4774                         # commitdiff with two commits given
4775                         my $hash_parent_short = $hash_parent;
4776                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4777                                 $hash_parent_short = substr($hash_parent, 0, 7);
4778                         }
4779                         $formats_nav .=
4780                                 ' (from';
4781                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4782                                 if ($co{'parents'}[$i] eq $hash_parent) {
4783                                         $formats_nav .= ' parent ' . ($i+1);
4784                                         last;
4785                                 }
4786                         }
4787                         $formats_nav .= ': ' .
4788                                 $cgi->a({-href => href(action=>"commitdiff",
4789                                                        hash=>$hash_parent)},
4790                                         esc_html($hash_parent_short)) .
4791                                 ')';
4792                 } elsif (!$co{'parent'}) {
4793                         # --root commitdiff
4794                         $formats_nav .= ' (initial)';
4795                 } elsif (scalar @{$co{'parents'}} == 1) {
4796                         # single parent commit
4797                         $formats_nav .=
4798                                 ' (parent: ' .
4799                                 $cgi->a({-href => href(action=>"commitdiff",
4800                                                        hash=>$co{'parent'})},
4801                                         esc_html(substr($co{'parent'}, 0, 7))) .
4802                                 ')';
4803                 } else {
4804                         # merge commit
4805                         if ($hash_parent eq '--cc') {
4806                                 $formats_nav .= ' | ' .
4807                                         $cgi->a({-href => href(action=>"commitdiff",
4808                                                                hash=>$hash, hash_parent=>'-c')},
4809                                                 'combined');
4810                         } else { # $hash_parent eq '-c'
4811                                 $formats_nav .= ' | ' .
4812                                         $cgi->a({-href => href(action=>"commitdiff",
4813                                                                hash=>$hash, hash_parent=>'--cc')},
4814                                                 'compact');
4815                         }
4816                         $formats_nav .=
4817                                 ' (merge: ' .
4818                                 join(' ', map {
4819                                         $cgi->a({-href => href(action=>"commitdiff",
4820                                                                hash=>$_)},
4821                                                 esc_html(substr($_, 0, 7)));
4822                                 } @{$co{'parents'}} ) .
4823                                 ')';
4824                 }
4825         }
4826
4827         my $hash_parent_param = $hash_parent;
4828         if (!defined $hash_parent_param) {
4829                 # --cc for multiple parents, --root for parentless
4830                 $hash_parent_param =
4831                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4832         }
4833
4834         # read commitdiff
4835         my $fd;
4836         my @difftree;
4837         if ($format eq 'html') {
4838                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4839                         "--no-commit-id", "--patch-with-raw", "--full-index",
4840                         $hash_parent_param, $hash, "--"
4841                         or die_error(undef, "Open git-diff-tree failed");
4842
4843                 while (my $line = <$fd>) {
4844                         chomp $line;
4845                         # empty line ends raw part of diff-tree output
4846                         last unless $line;
4847                         push @difftree, scalar parse_difftree_raw_line($line);
4848                 }
4849
4850         } elsif ($format eq 'plain') {
4851                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4852                         '-p', $hash_parent_param, $hash, "--"
4853                         or die_error(undef, "Open git-diff-tree failed");
4854
4855         } else {
4856                 die_error(undef, "Unknown commitdiff format");
4857         }
4858
4859         # non-textual hash id's can be cached
4860         my $expires;
4861         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4862                 $expires = "+1d";
4863         }
4864
4865         # write commit message
4866         if ($format eq 'html') {
4867                 my $refs = git_get_references();
4868                 my $ref = format_ref_marker($refs, $co{'id'});
4869
4870                 git_header_html(undef, $expires);
4871                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4872                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4873                 git_print_authorship(\%co);
4874                 print "<div class=\"page_body\">\n";
4875                 if (@{$co{'comment'}} > 1) {
4876                         print "<div class=\"log\">\n";
4877                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4878                         print "</div>\n"; # class="log"
4879                 }
4880
4881         } elsif ($format eq 'plain') {
4882                 my $refs = git_get_references("tags");
4883                 my $tagname = git_get_rev_name_tags($hash);
4884                 my $filename = basename($project) . "-$hash.patch";
4885
4886                 print $cgi->header(
4887                         -type => 'text/plain',
4888                         -charset => 'utf-8',
4889                         -expires => $expires,
4890                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4891                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4892                 print <<TEXT;
4893 From: $co{'author'}
4894 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4895 Subject: $co{'title'}
4896 TEXT
4897                 print "X-Git-Tag: $tagname\n" if $tagname;
4898                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4899
4900                 foreach my $line (@{$co{'comment'}}) {
4901                         print "$line\n";
4902                 }
4903                 print "---\n\n";
4904         }
4905
4906         # write patch
4907         if ($format eq 'html') {
4908                 my $use_parents = !defined $hash_parent ||
4909                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4910                 git_difftree_body(\@difftree, $hash,
4911                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4912                 print "<br/>\n";
4913
4914                 git_patchset_body($fd, \@difftree, $hash,
4915                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4916                 close $fd;
4917                 print "</div>\n"; # class="page_body"
4918                 git_footer_html();
4919
4920         } elsif ($format eq 'plain') {
4921                 local $/ = undef;
4922                 print <$fd>;
4923                 close $fd
4924                         or print "Reading git-diff-tree failed\n";
4925         }
4926 }
4927
4928 sub git_commitdiff_plain {
4929         git_commitdiff('plain');
4930 }
4931
4932 sub git_history {
4933         if (!defined $hash_base) {
4934                 $hash_base = git_get_head_hash($project);
4935         }
4936         if (!defined $page) {
4937                 $page = 0;
4938         }
4939         my $ftype;
4940         my %co = parse_commit($hash_base);
4941         if (!%co) {
4942                 die_error(undef, "Unknown commit object");
4943         }
4944
4945         my $refs = git_get_references();
4946         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4947
4948         if (!defined $hash && defined $file_name) {
4949                 $hash = git_get_hash_by_path($hash_base, $file_name);
4950         }
4951         if (defined $hash) {
4952                 $ftype = git_get_type($hash);
4953         }
4954
4955         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
4956
4957         my $paging_nav = '';
4958         if ($page > 0) {
4959                 $paging_nav .=
4960                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4961                                                file_name=>$file_name)},
4962                                 "first");
4963                 $paging_nav .= " &sdot; " .
4964                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4965                                                file_name=>$file_name, page=>$page-1),
4966                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4967         } else {
4968                 $paging_nav .= "first";
4969                 $paging_nav .= " &sdot; prev";
4970         }
4971         if ($#commitlist >= 100) {
4972                 $paging_nav .= " &sdot; " .
4973                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4974                                                file_name=>$file_name, page=>$page+1),
4975                                  -accesskey => "n", -title => "Alt-n"}, "next");
4976         } else {
4977                 $paging_nav .= " &sdot; next";
4978         }
4979         my $next_link = '';
4980         if ($#commitlist >= 100) {
4981                 $next_link =
4982                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4983                                                file_name=>$file_name, page=>$page+1),
4984                                  -accesskey => "n", -title => "Alt-n"}, "next");
4985         }
4986
4987         git_header_html();
4988         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
4989         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4990         git_print_page_path($file_name, $ftype, $hash_base);
4991
4992         git_history_body(\@commitlist, 0, 99,
4993                          $refs, $hash_base, $ftype, $next_link);
4994
4995         git_footer_html();
4996 }
4997
4998 sub git_search {
4999         my ($have_search) = gitweb_check_feature('search');
5000         if (!$have_search) {
5001                 die_error('403 Permission denied', "Permission denied");
5002         }
5003         if (!defined $searchtext) {
5004                 die_error(undef, "Text field empty");
5005         }
5006         if (!defined $hash) {
5007                 $hash = git_get_head_hash($project);
5008         }
5009         my %co = parse_commit($hash);
5010         if (!%co) {
5011                 die_error(undef, "Unknown commit object");
5012         }
5013         if (!defined $page) {
5014                 $page = 0;
5015         }
5016
5017         $searchtype ||= 'commit';
5018         if ($searchtype eq 'pickaxe') {
5019                 # pickaxe may take all resources of your box and run for several minutes
5020                 # with every query - so decide by yourself how public you make this feature
5021                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5022                 if (!$have_pickaxe) {
5023                         die_error('403 Permission denied', "Permission denied");
5024                 }
5025         }
5026         if ($searchtype eq 'grep') {
5027                 my ($have_grep) = gitweb_check_feature('grep');
5028                 if (!$have_grep) {
5029                         die_error('403 Permission denied', "Permission denied");
5030                 }
5031         }
5032
5033         git_header_html();
5034
5035         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5036                 my $greptype;
5037                 if ($searchtype eq 'commit') {
5038                         $greptype = "--grep=";
5039                 } elsif ($searchtype eq 'author') {
5040                         $greptype = "--author=";
5041                 } elsif ($searchtype eq 'committer') {
5042                         $greptype = "--committer=";
5043                 }
5044                 $greptype .= $search_regexp;
5045                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5046
5047                 my $paging_nav = '';
5048                 if ($page > 0) {
5049                         $paging_nav .=
5050                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5051                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5052                                         "first");
5053                         $paging_nav .= " &sdot; " .
5054                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5055                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5056                                                        page=>$page-1),
5057                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5058                 } else {
5059                         $paging_nav .= "first";
5060                         $paging_nav .= " &sdot; prev";
5061                 }
5062                 if ($#commitlist >= 100) {
5063                         $paging_nav .= " &sdot; " .
5064                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5065                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5066                                                        page=>$page+1),
5067                                          -accesskey => "n", -title => "Alt-n"}, "next");
5068                 } else {
5069                         $paging_nav .= " &sdot; next";
5070                 }
5071                 my $next_link = '';
5072                 if ($#commitlist >= 100) {
5073                         $next_link =
5074                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5075                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5076                                                        page=>$page+1),
5077                                          -accesskey => "n", -title => "Alt-n"}, "next");
5078                 }
5079
5080                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5081                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5082                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5083         }
5084
5085         if ($searchtype eq 'pickaxe') {
5086                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5087                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5088
5089                 print "<table cellspacing=\"0\">\n";
5090                 my $alternate = 1;
5091                 $/ = "\n";
5092                 my $git_command = git_cmd_str();
5093                 my $searchqtext = $searchtext;
5094                 $searchqtext =~ s/'/'\\''/;
5095                 open my $fd, "-|", "$git_command rev-list $hash | " .
5096                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5097                 undef %co;
5098                 my @files;
5099                 while (my $line = <$fd>) {
5100                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5101                                 my %set;
5102                                 $set{'file'} = $6;
5103                                 $set{'from_id'} = $3;
5104                                 $set{'to_id'} = $4;
5105                                 $set{'id'} = $set{'to_id'};
5106                                 if ($set{'id'} =~ m/0{40}/) {
5107                                         $set{'id'} = $set{'from_id'};
5108                                 }
5109                                 if ($set{'id'} =~ m/0{40}/) {
5110                                         next;
5111                                 }
5112                                 push @files, \%set;
5113                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5114                                 if (%co) {
5115                                         if ($alternate) {
5116                                                 print "<tr class=\"dark\">\n";
5117                                         } else {
5118                                                 print "<tr class=\"light\">\n";
5119                                         }
5120                                         $alternate ^= 1;
5121                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5122                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5123                                               "<td>" .
5124                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5125                                                       -class => "list subject"},
5126                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5127                                         while (my $setref = shift @files) {
5128                                                 my %set = %$setref;
5129                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5130                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5131                                                               -class => "list"},
5132                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5133                                                       "<br/>\n";
5134                                         }
5135                                         print "</td>\n" .
5136                                               "<td class=\"link\">" .
5137                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5138                                               " | " .
5139                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5140                                         print "</td>\n" .
5141                                               "</tr>\n";
5142                                 }
5143                                 %co = parse_commit($1);
5144                         }
5145                 }
5146                 close $fd;
5147
5148                 print "</table>\n";
5149         }
5150
5151         if ($searchtype eq 'grep') {
5152                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5153                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5154
5155                 print "<table cellspacing=\"0\">\n";
5156                 my $alternate = 1;
5157                 my $matches = 0;
5158                 $/ = "\n";
5159                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5160                 my $lastfile = '';
5161                 while (my $line = <$fd>) {
5162                         chomp $line;
5163                         my ($file, $lno, $ltext, $binary);
5164                         last if ($matches++ > 1000);
5165                         if ($line =~ /^Binary file (.+) matches$/) {
5166                                 $file = $1;
5167                                 $binary = 1;
5168                         } else {
5169                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5170                         }
5171                         if ($file ne $lastfile) {
5172                                 $lastfile and print "</td></tr>\n";
5173                                 if ($alternate++) {
5174                                         print "<tr class=\"dark\">\n";
5175                                 } else {
5176                                         print "<tr class=\"light\">\n";
5177                                 }
5178                                 print "<td class=\"list\">".
5179                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5180                                                                file_name=>"$file"),
5181                                                 -class => "list"}, esc_path($file));
5182                                 print "</td><td>\n";
5183                                 $lastfile = $file;
5184                         }
5185                         if ($binary) {
5186                                 print "<div class=\"binary\">Binary file</div>\n";
5187                         } else {
5188                                 $ltext = untabify($ltext);
5189                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5190                                         $ltext = esc_html($1, -nbsp=>1);
5191                                         $ltext .= '<span class="match">';
5192                                         $ltext .= esc_html($2, -nbsp=>1);
5193                                         $ltext .= '</span>';
5194                                         $ltext .= esc_html($3, -nbsp=>1);
5195                                 } else {
5196                                         $ltext = esc_html($ltext, -nbsp=>1);
5197                                 }
5198                                 print "<div class=\"pre\">" .
5199                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5200                                                                file_name=>"$file").'#l'.$lno,
5201                                                 -class => "linenr"}, sprintf('%4i', $lno))
5202                                         . ' ' .  $ltext . "</div>\n";
5203                         }
5204                 }
5205                 if ($lastfile) {
5206                         print "</td></tr>\n";
5207                         if ($matches > 1000) {
5208                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5209                         }
5210                 } else {
5211                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5212                 }
5213                 close $fd;
5214
5215                 print "</table>\n";
5216         }
5217         git_footer_html();
5218 }
5219
5220 sub git_search_help {
5221         git_header_html();
5222         git_print_page_nav('','', $hash,$hash,$hash);
5223         print <<EOT;
5224 <dl>
5225 <dt><b>commit</b></dt>
5226 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5227 EOT
5228         my ($have_grep) = gitweb_check_feature('grep');
5229         if ($have_grep) {
5230                 print <<EOT;
5231 <dt><b>grep</b></dt>
5232 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5233     a different one) are searched for the given
5234 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5235 (POSIX extended) and the matches are listed. On large
5236 trees, this search can take a while and put some strain on the server, so please use it with
5237 some consideration.</dd>
5238 EOT
5239         }
5240         print <<EOT;
5241 <dt><b>author</b></dt>
5242 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5243 <dt><b>committer</b></dt>
5244 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5245 EOT
5246         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5247         if ($have_pickaxe) {
5248                 print <<EOT;
5249 <dt><b>pickaxe</b></dt>
5250 <dd>All commits that caused the string to appear or disappear from any file (changes that
5251 added, removed or "modified" the string) will be listed. This search can take a while and
5252 takes a lot of strain on the server, so please use it wisely.</dd>
5253 EOT
5254         }
5255         print "</dl>\n";
5256         git_footer_html();
5257 }
5258
5259 sub git_shortlog {
5260         my $head = git_get_head_hash($project);
5261         if (!defined $hash) {
5262                 $hash = $head;
5263         }
5264         if (!defined $page) {
5265                 $page = 0;
5266         }
5267         my $refs = git_get_references();
5268
5269         my @commitlist = parse_commits($hash, 101, (100 * $page));
5270
5271         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5272         my $next_link = '';
5273         if ($#commitlist >= 100) {
5274                 $next_link =
5275                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5276                                  -accesskey => "n", -title => "Alt-n"}, "next");
5277         }
5278
5279         git_header_html();
5280         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5281         git_print_header_div('summary', $project);
5282
5283         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5284
5285         git_footer_html();
5286 }
5287
5288 ## ......................................................................
5289 ## feeds (RSS, Atom; OPML)
5290
5291 sub git_feed {
5292         my $format = shift || 'atom';
5293         my ($have_blame) = gitweb_check_feature('blame');
5294
5295         # Atom: http://www.atomenabled.org/developers/syndication/
5296         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5297         if ($format ne 'rss' && $format ne 'atom') {
5298                 die_error(undef, "Unknown web feed format");
5299         }
5300
5301         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5302         my $head = $hash || 'HEAD';
5303         my @commitlist = parse_commits($head, 150);
5304
5305         my %latest_commit;
5306         my %latest_date;
5307         my $content_type = "application/$format+xml";
5308         if (defined $cgi->http('HTTP_ACCEPT') &&
5309                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5310                 # browser (feed reader) prefers text/xml
5311                 $content_type = 'text/xml';
5312         }
5313         if (defined($commitlist[0])) {
5314                 %latest_commit = %{$commitlist[0]};
5315                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5316                 print $cgi->header(
5317                         -type => $content_type,
5318                         -charset => 'utf-8',
5319                         -last_modified => $latest_date{'rfc2822'});
5320         } else {
5321                 print $cgi->header(
5322                         -type => $content_type,
5323                         -charset => 'utf-8');
5324         }
5325
5326         # Optimization: skip generating the body if client asks only
5327         # for Last-Modified date.
5328         return if ($cgi->request_method() eq 'HEAD');
5329
5330         # header variables
5331         my $title = "$site_name - $project/$action";
5332         my $feed_type = 'log';
5333         if (defined $hash) {
5334                 $title .= " - '$hash'";
5335                 $feed_type = 'branch log';
5336                 if (defined $file_name) {
5337                         $title .= " :: $file_name";
5338                         $feed_type = 'history';
5339                 }
5340         } elsif (defined $file_name) {
5341                 $title .= " - $file_name";
5342                 $feed_type = 'history';
5343         }
5344         $title .= " $feed_type";
5345         my $descr = git_get_project_description($project);
5346         if (defined $descr) {
5347                 $descr = esc_html($descr);
5348         } else {
5349                 $descr = "$project " .
5350                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5351                          " feed";
5352         }
5353         my $owner = git_get_project_owner($project);
5354         $owner = esc_html($owner);
5355
5356         #header
5357         my $alt_url;
5358         if (defined $file_name) {
5359                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5360         } elsif (defined $hash) {
5361                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5362         } else {
5363                 $alt_url = href(-full=>1, action=>"summary");
5364         }
5365         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5366         if ($format eq 'rss') {
5367                 print <<XML;
5368 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5369 <channel>
5370 XML
5371                 print "<title>$title</title>\n" .
5372                       "<link>$alt_url</link>\n" .
5373                       "<description>$descr</description>\n" .
5374                       "<language>en</language>\n";
5375         } elsif ($format eq 'atom') {
5376                 print <<XML;
5377 <feed xmlns="http://www.w3.org/2005/Atom">
5378 XML
5379                 print "<title>$title</title>\n" .
5380                       "<subtitle>$descr</subtitle>\n" .
5381                       '<link rel="alternate" type="text/html" href="' .
5382                       $alt_url . '" />' . "\n" .
5383                       '<link rel="self" type="' . $content_type . '" href="' .
5384                       $cgi->self_url() . '" />' . "\n" .
5385                       "<id>" . href(-full=>1) . "</id>\n" .
5386                       # use project owner for feed author
5387                       "<author><name>$owner</name></author>\n";
5388                 if (defined $favicon) {
5389                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5390                 }
5391                 if (defined $logo_url) {
5392                         # not twice as wide as tall: 72 x 27 pixels
5393                         print "<logo>" . esc_url($logo) . "</logo>\n";
5394                 }
5395                 if (! %latest_date) {
5396                         # dummy date to keep the feed valid until commits trickle in:
5397                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5398                 } else {
5399                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5400                 }
5401         }
5402
5403         # contents
5404         for (my $i = 0; $i <= $#commitlist; $i++) {
5405                 my %co = %{$commitlist[$i]};
5406                 my $commit = $co{'id'};
5407                 # we read 150, we always show 30 and the ones more recent than 48 hours
5408                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5409                         last;
5410                 }
5411                 my %cd = parse_date($co{'author_epoch'});
5412
5413                 # get list of changed files
5414                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5415                         $co{'parent'} || "--root",
5416                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5417                         or next;
5418                 my @difftree = map { chomp; $_ } <$fd>;
5419                 close $fd
5420                         or next;
5421
5422                 # print element (entry, item)
5423                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5424                 if ($format eq 'rss') {
5425                         print "<item>\n" .
5426                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5427                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5428                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5429                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5430                               "<link>$co_url</link>\n" .
5431                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5432                               "<content:encoded>" .
5433                               "<![CDATA[\n";
5434                 } elsif ($format eq 'atom') {
5435                         print "<entry>\n" .
5436                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5437                               "<updated>$cd{'iso-8601'}</updated>\n" .
5438                               "<author>\n" .
5439                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5440                         if ($co{'author_email'}) {
5441                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5442                         }
5443                         print "</author>\n" .
5444                               # use committer for contributor
5445                               "<contributor>\n" .
5446                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5447                         if ($co{'committer_email'}) {
5448                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5449                         }
5450                         print "</contributor>\n" .
5451                               "<published>$cd{'iso-8601'}</published>\n" .
5452                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5453                               "<id>$co_url</id>\n" .
5454                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5455                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5456                 }
5457                 my $comment = $co{'comment'};
5458                 print "<pre>\n";
5459                 foreach my $line (@$comment) {
5460                         $line = esc_html($line);
5461                         print "$line\n";
5462                 }
5463                 print "</pre><ul>\n";
5464                 foreach my $difftree_line (@difftree) {
5465                         my %difftree = parse_difftree_raw_line($difftree_line);
5466                         next if !$difftree{'from_id'};
5467
5468                         my $file = $difftree{'file'} || $difftree{'to_file'};
5469
5470                         print "<li>" .
5471                               "[" .
5472                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5473                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5474                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5475                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5476                                       -title => "diff"}, 'D');
5477                         if ($have_blame) {
5478                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5479                                                              file_name=>$file, hash_base=>$commit),
5480                                               -title => "blame"}, 'B');
5481                         }
5482                         # if this is not a feed of a file history
5483                         if (!defined $file_name || $file_name ne $file) {
5484                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5485                                                              file_name=>$file, hash=>$commit),
5486                                               -title => "history"}, 'H');
5487                         }
5488                         $file = esc_path($file);
5489                         print "] ".
5490                               "$file</li>\n";
5491                 }
5492                 if ($format eq 'rss') {
5493                         print "</ul>]]>\n" .
5494                               "</content:encoded>\n" .
5495                               "</item>\n";
5496                 } elsif ($format eq 'atom') {
5497                         print "</ul>\n</div>\n" .
5498                               "</content>\n" .
5499                               "</entry>\n";
5500                 }
5501         }
5502
5503         # end of feed
5504         if ($format eq 'rss') {
5505                 print "</channel>\n</rss>\n";
5506         }       elsif ($format eq 'atom') {
5507                 print "</feed>\n";
5508         }
5509 }
5510
5511 sub git_rss {
5512         git_feed('rss');
5513 }
5514
5515 sub git_atom {
5516         git_feed('atom');
5517 }
5518
5519 sub git_opml {
5520         my @list = git_get_projects_list();
5521
5522         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5523         print <<XML;
5524 <?xml version="1.0" encoding="utf-8"?>
5525 <opml version="1.0">
5526 <head>
5527   <title>$site_name OPML Export</title>
5528 </head>
5529 <body>
5530 <outline text="git RSS feeds">
5531 XML
5532
5533         foreach my $pr (@list) {
5534                 my %proj = %$pr;
5535                 my $head = git_get_head_hash($proj{'path'});
5536                 if (!defined $head) {
5537                         next;
5538                 }
5539                 $git_dir = "$projectroot/$proj{'path'}";
5540                 my %co = parse_commit($head);
5541                 if (!%co) {
5542                         next;
5543                 }
5544
5545                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5546                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5547                 my $html = "$my_url?p=$proj{'path'};a=summary";
5548                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5549         }
5550         print <<XML;
5551 </outline>
5552 </body>
5553 </opml>
5554 XML
5555 }