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 # if we're called with PATH_INFO, we have to strip that
  31 # from the URL to find our real URL
  32 if (my $path_info = $ENV{"PATH_INFO"}) {
  33         $my_url =~ s,\Q$path_info\E$,,;
  34         $my_uri =~ s,\Q$path_info\E$,,;
  35 }
  36
  37 # core git executable to use
  38 # this can just be "git" if your webserver has a sensible PATH
  39 our $GIT = "++GIT_BINDIR++/git";
  40
  41 # absolute fs-path which will be prepended to the project path
  42 #our $projectroot = "/pub/scm";
  43 our $projectroot = "++GITWEB_PROJECTROOT++";
  44
  45 # fs traversing limit for getting project list
  46 # the number is relative to the projectroot
  47 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  48
  49 # target of the home link on top of all pages
  50 our $home_link = $my_uri || "/";
  51
  52 # string of the home link on top of all pages
  53 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  54
  55 # name of your site or organization to appear in page titles
  56 # replace this with something more descriptive for clearer bookmarks
  57 our $site_name = "++GITWEB_SITENAME++"
  58                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  59
  60 # filename of html text to include at top of each page
  61 our $site_header = "++GITWEB_SITE_HEADER++";
  62 # html text to include at home page
  63 our $home_text = "++GITWEB_HOMETEXT++";
  64 # filename of html text to include at bottom of each page
  65 our $site_footer = "++GITWEB_SITE_FOOTER++";
  66
  67 # URI of stylesheets
  68 our @stylesheets = ("++GITWEB_CSS++");
  69 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  70 our $stylesheet = undef;
  71 # URI of GIT logo (72x27 size)
  72 our $logo = "++GITWEB_LOGO++";
  73 # URI of GIT favicon, assumed to be image/png type
  74 our $favicon = "++GITWEB_FAVICON++";
  75
  76 # URI and label (title) of GIT logo link
  77 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  78 #our $logo_label = "git documentation";
  79 our $logo_url = "http://git.or.cz/";
  80 our $logo_label = "git homepage";
  81
  82 # source of projects list
  83 our $projects_list = "++GITWEB_LIST++";
  84
  85 # the width (in characters) of the projects list "Description" column
  86 our $projects_list_description_width = 25;
  87
  88 # default order of projects list
  89 # valid values are none, project, descr, owner, and age
  90 our $default_projects_order = "project";
  91
  92 # show repository only if this file exists
  93 # (only effective if this variable evaluates to true)
  94 our $export_ok = "++GITWEB_EXPORT_OK++";
  95
  96 # only allow viewing of repositories also shown on the overview page
  97 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  98
  99 # list of git base URLs used for URL to where fetch project from,
 100 # i.e. full URL is "$git_base_url/$project"
 101 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 102
 103 # default blob_plain mimetype and default charset for text/plain blob
 104 our $default_blob_plain_mimetype = 'text/plain';
 105 our $default_text_plain_charset  = undef;
 106
 107 # file to use for guessing MIME types before trying /etc/mime.types
 108 # (relative to the current git repository)
 109 our $mimetypes_file = undef;
 110
 111 # assume this charset if line contains non-UTF-8 characters;
 112 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 113 # for which encoding all byte sequences are valid, for example
 114 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 115 # could be even 'utf-8' for the old behavior)
 116 our $fallback_encoding = 'latin1';
 117
 118 # rename detection options for git-diff and git-diff-tree
 119 # - default is '-M', with the cost proportional to
 120 #   (number of removed files) * (number of new files).
 121 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 122 #   (number of changed files + number of removed files) * (number of new files)
 123 # - even more costly is '-C', '--find-copies-harder' with cost
 124 #   (number of files in the original tree) * (number of new files)
 125 # - one might want to include '-B' option, e.g. '-B', '-M'
 126 our @diff_opts = ('-M'); # taken from git_commit
 127
 128 # information about snapshot formats that gitweb is capable of serving
 129 our %known_snapshot_formats = (
 130         # name => {
 131         #       'display' => display name,
 132         #       'type' => mime type,
 133         #       'suffix' => filename suffix,
 134         #       'format' => --format for git-archive,
 135         #       'compressor' => [compressor command and arguments]
 136         #                       (array reference, optional)}
 137         #
 138         'tgz' => {
 139                 'display' => 'tar.gz',
 140                 'type' => 'application/x-gzip',
 141                 'suffix' => '.tar.gz',
 142                 'format' => 'tar',
 143                 'compressor' => ['gzip']},
 144
 145         'tbz2' => {
 146                 'display' => 'tar.bz2',
 147                 'type' => 'application/x-bzip2',
 148                 'suffix' => '.tar.bz2',
 149                 'format' => 'tar',
 150                 'compressor' => ['bzip2']},
 151
 152         'zip' => {
 153                 'display' => 'zip',
 154                 'type' => 'application/x-zip',
 155                 'suffix' => '.zip',
 156                 'format' => 'zip'},
 157 );
 158
 159 # Aliases so we understand old gitweb.snapshot values in repository
 160 # configuration.
 161 our %known_snapshot_format_aliases = (
 162         'gzip'  => 'tgz',
 163         'bzip2' => 'tbz2',
 164
 165         # backward compatibility: legacy gitweb config support
 166         'x-gzip' => undef, 'gz' => undef,
 167         'x-bzip2' => undef, 'bz2' => undef,
 168         'x-zip' => undef, '' => undef,
 169 );
 170
 171 # You define site-wide feature defaults here; override them with
 172 # $GITWEB_CONFIG as necessary.
 173 our %feature = (
 174         # feature => {
 175         #       'sub' => feature-sub (subroutine),
 176         #       'override' => allow-override (boolean),
 177         #       'default' => [ default options...] (array reference)}
 178         #
 179         # if feature is overridable (it means that allow-override has true value),
 180         # then feature-sub will be called with default options as parameters;
 181         # return value of feature-sub indicates if to enable specified feature
 182         #
 183         # if there is no 'sub' key (no feature-sub), then feature cannot be
 184         # overriden
 185         #
 186         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 187
 188         # Enable the 'blame' blob view, showing the last commit that modified
 189         # each line in the file. This can be very CPU-intensive.
 190
 191         # To enable system wide have in $GITWEB_CONFIG
 192         # $feature{'blame'}{'default'} = [1];
 193         # To have project specific config enable override in $GITWEB_CONFIG
 194         # $feature{'blame'}{'override'} = 1;
 195         # and in project config gitweb.blame = 0|1;
 196         'blame' => {
 197                 'sub' => \&feature_blame,
 198                 'override' => 0,
 199                 'default' => [0]},
 200
 201         # Enable the 'snapshot' link, providing a compressed archive of any
 202         # tree. This can potentially generate high traffic if you have large
 203         # project.
 204
 205         # Value is a list of formats defined in %known_snapshot_formats that
 206         # you wish to offer.
 207         # To disable system wide have in $GITWEB_CONFIG
 208         # $feature{'snapshot'}{'default'} = [];
 209         # To have project specific config enable override in $GITWEB_CONFIG
 210         # $feature{'snapshot'}{'override'} = 1;
 211         # and in project config, a comma-separated list of formats or "none"
 212         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 213         'snapshot' => {
 214                 'sub' => \&feature_snapshot,
 215                 'override' => 0,
 216                 'default' => ['tgz']},
 217
 218         # Enable text search, which will list the commits which match author,
 219         # committer or commit text to a given string.  Enabled by default.
 220         # Project specific override is not supported.
 221         'search' => {
 222                 'override' => 0,
 223                 'default' => [1]},
 224
 225         # Enable grep search, which will list the files in currently selected
 226         # tree containing the given string. Enabled by default. This can be
 227         # potentially CPU-intensive, of course.
 228
 229         # To enable system wide have in $GITWEB_CONFIG
 230         # $feature{'grep'}{'default'} = [1];
 231         # To have project specific config enable override in $GITWEB_CONFIG
 232         # $feature{'grep'}{'override'} = 1;
 233         # and in project config gitweb.grep = 0|1;
 234         'grep' => {
 235                 'override' => 0,
 236                 'default' => [1]},
 237
 238         # Enable the pickaxe search, which will list the commits that modified
 239         # a given string in a file. This can be practical and quite faster
 240         # alternative to 'blame', but still potentially CPU-intensive.
 241
 242         # To enable system wide have in $GITWEB_CONFIG
 243         # $feature{'pickaxe'}{'default'} = [1];
 244         # To have project specific config enable override in $GITWEB_CONFIG
 245         # $feature{'pickaxe'}{'override'} = 1;
 246         # and in project config gitweb.pickaxe = 0|1;
 247         'pickaxe' => {
 248                 'sub' => \&feature_pickaxe,
 249                 'override' => 0,
 250                 'default' => [1]},
 251
 252         # Make gitweb use an alternative format of the URLs which can be
 253         # more readable and natural-looking: project name is embedded
 254         # directly in the path and the query string contains other
 255         # auxiliary information. All gitweb installations recognize
 256         # URL in either format; this configures in which formats gitweb
 257         # generates links.
 258
 259         # To enable system wide have in $GITWEB_CONFIG
 260         # $feature{'pathinfo'}{'default'} = [1];
 261         # Project specific override is not supported.
 262
 263         # Note that you will need to change the default location of CSS,
 264         # favicon, logo and possibly other files to an absolute URL. Also,
 265         # if gitweb.cgi serves as your indexfile, you will need to force
 266         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 267         'pathinfo' => {
 268                 'override' => 0,
 269                 'default' => [0]},
 270
 271         # Make gitweb consider projects in project root subdirectories
 272         # to be forks of existing projects. Given project $projname.git,
 273         # projects matching $projname/*.git will not be shown in the main
 274         # projects list, instead a '+' mark will be added to $projname
 275         # there and a 'forks' view will be enabled for the project, listing
 276         # all the forks. If project list is taken from a file, forks have
 277         # to be listed after the main project.
 278
 279         # To enable system wide have in $GITWEB_CONFIG
 280         # $feature{'forks'}{'default'} = [1];
 281         # Project specific override is not supported.
 282         'forks' => {
 283                 'override' => 0,
 284                 'default' => [0]},
 285
 286         # Insert custom links to the action bar of all project pages.
 287         # This enables you mainly to link to third-party scripts integrating
 288         # into gitweb; e.g. git-browser for graphical history representation
 289         # or custom web-based repository administration interface.
 290
 291         # The 'default' value consists of a list of triplets in the form
 292         # (label, link, position) where position is the label after which
 293         # to inster the link and link is a format string where %n expands
 294         # to the project name, %f to the project path within the filesystem,
 295         # %h to the current hash (h gitweb parameter) and %b to the current
 296         # hash base (hb gitweb parameter).
 297
 298         # To enable system wide have in $GITWEB_CONFIG e.g.
 299         # $feature{'actions'}{'default'} = [('graphiclog',
 300         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 301         # Project specific override is not supported.
 302         'actions' => {
 303                 'override' => 0,
 304                 'default' => []},
 305 );
 306
 307 sub gitweb_check_feature {
 308         my ($name) = @_;
 309         return unless exists $feature{$name};
 310         my ($sub, $override, @defaults) = (
 311                 $feature{$name}{'sub'},
 312                 $feature{$name}{'override'},
 313                 @{$feature{$name}{'default'}});
 314         if (!$override) { return @defaults; }
 315         if (!defined $sub) {
 316                 warn "feature $name is not overrideable";
 317                 return @defaults;
 318         }
 319         return $sub->(@defaults);
 320 }
 321
 322 sub feature_blame {
 323         my ($val) = git_get_project_config('blame', '--bool');
 324
 325         if ($val eq 'true') {
 326                 return 1;
 327         } elsif ($val eq 'false') {
 328                 return 0;
 329         }
 330
 331         return $_[0];
 332 }
 333
 334 sub feature_snapshot {
 335         my (@fmts) = @_;
 336
 337         my ($val) = git_get_project_config('snapshot');
 338
 339         if ($val) {
 340                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 341         }
 342
 343         return @fmts;
 344 }
 345
 346 sub feature_grep {
 347         my ($val) = git_get_project_config('grep', '--bool');
 348
 349         if ($val eq 'true') {
 350                 return (1);
 351         } elsif ($val eq 'false') {
 352                 return (0);
 353         }
 354
 355         return ($_[0]);
 356 }
 357
 358 sub feature_pickaxe {
 359         my ($val) = git_get_project_config('pickaxe', '--bool');
 360
 361         if ($val eq 'true') {
 362                 return (1);
 363         } elsif ($val eq 'false') {
 364                 return (0);
 365         }
 366
 367         return ($_[0]);
 368 }
 369
 370 # checking HEAD file with -e is fragile if the repository was
 371 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 372 # and then pruned.
 373 sub check_head_link {
 374         my ($dir) = @_;
 375         my $headfile = "$dir/HEAD";
 376         return ((-e $headfile) ||
 377                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 378 }
 379
 380 sub check_export_ok {
 381         my ($dir) = @_;
 382         return (check_head_link($dir) &&
 383                 (!$export_ok || -e "$dir/$export_ok"));
 384 }
 385
 386 # process alternate names for backward compatibility
 387 # filter out unsupported (unknown) snapshot formats
 388 sub filter_snapshot_fmts {
 389         my @fmts = @_;
 390
 391         @fmts = map {
 392                 exists $known_snapshot_format_aliases{$_} ?
 393                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 394         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 395
 396 }
 397
 398 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 399 if (-e $GITWEB_CONFIG) {
 400         do $GITWEB_CONFIG;
 401 } else {
 402         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 403         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 404 }
 405
 406 # version of the core git binary
 407 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 408
 409 $projects_list ||= $projectroot;
 410
 411 # ======================================================================
 412 # input validation and dispatch
 413 our $action = $cgi->param('a');
 414 if (defined $action) {
 415         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 416                 die_error(400, "Invalid action parameter");
 417         }
 418 }
 419
 420 # parameters which are pathnames
 421 our $project = $cgi->param('p');
 422 if (defined $project) {
 423         if (!validate_pathname($project) ||
 424             !(-d "$projectroot/$project") ||
 425             !check_head_link("$projectroot/$project") ||
 426             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 427             ($strict_export && !project_in_list($project))) {
 428                 undef $project;
 429                 die_error(404, "No such project");
 430         }
 431 }
 432
 433 our $file_name = $cgi->param('f');
 434 if (defined $file_name) {
 435         if (!validate_pathname($file_name)) {
 436                 die_error(400, "Invalid file parameter");
 437         }
 438 }
 439
 440 our $file_parent = $cgi->param('fp');
 441 if (defined $file_parent) {
 442         if (!validate_pathname($file_parent)) {
 443                 die_error(400, "Invalid file parent parameter");
 444         }
 445 }
 446
 447 # parameters which are refnames
 448 our $hash = $cgi->param('h');
 449 if (defined $hash) {
 450         if (!validate_refname($hash)) {
 451                 die_error(400, "Invalid hash parameter");
 452         }
 453 }
 454
 455 our $hash_parent = $cgi->param('hp');
 456 if (defined $hash_parent) {
 457         if (!validate_refname($hash_parent)) {
 458                 die_error(400, "Invalid hash parent parameter");
 459         }
 460 }
 461
 462 our $hash_base = $cgi->param('hb');
 463 if (defined $hash_base) {
 464         if (!validate_refname($hash_base)) {
 465                 die_error(400, "Invalid hash base parameter");
 466         }
 467 }
 468
 469 my %allowed_options = (
 470         "--no-merges" => [ qw(rss atom log shortlog history) ],
 471 );
 472
 473 our @extra_options = $cgi->param('opt');
 474 if (defined @extra_options) {
 475         foreach my $opt (@extra_options) {
 476                 if (not exists $allowed_options{$opt}) {
 477                         die_error(400, "Invalid option parameter");
 478                 }
 479                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 480                         die_error(400, "Invalid option parameter for this action");
 481                 }
 482         }
 483 }
 484
 485 our $hash_parent_base = $cgi->param('hpb');
 486 if (defined $hash_parent_base) {
 487         if (!validate_refname($hash_parent_base)) {
 488                 die_error(400, "Invalid hash parent base parameter");
 489         }
 490 }
 491
 492 # other parameters
 493 our $page = $cgi->param('pg');
 494 if (defined $page) {
 495         if ($page =~ m/[^0-9]/) {
 496                 die_error(400, "Invalid page parameter");
 497         }
 498 }
 499
 500 our $searchtype = $cgi->param('st');
 501 if (defined $searchtype) {
 502         if ($searchtype =~ m/[^a-z]/) {
 503                 die_error(400, "Invalid searchtype parameter");
 504         }
 505 }
 506
 507 our $search_use_regexp = $cgi->param('sr');
 508
 509 our $searchtext = $cgi->param('s');
 510 our $search_regexp;
 511 if (defined $searchtext) {
 512         if (length($searchtext) < 2) {
 513                 die_error(403, "At least two characters are required for search parameter");
 514         }
 515         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 516 }
 517
 518 # now read PATH_INFO and use it as alternative to parameters
 519 sub evaluate_path_info {
 520         return if defined $project;
 521         my $path_info = $ENV{"PATH_INFO"};
 522         return if !$path_info;
 523         $path_info =~ s,^/+,,;
 524         return if !$path_info;
 525         # find which part of PATH_INFO is project
 526         $project = $path_info;
 527         $project =~ s,/+$,,;
 528         while ($project && !check_head_link("$projectroot/$project")) {
 529                 $project =~ s,/*[^/]*$,,;
 530         }
 531         # validate project
 532         $project = validate_pathname($project);
 533         if (!$project ||
 534             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 535             ($strict_export && !project_in_list($project))) {
 536                 undef $project;
 537                 return;
 538         }
 539         # do not change any parameters if an action is given using the query string
 540         return if $action;
 541         $path_info =~ s,^\Q$project\E/*,,;
 542         my ($refname, $pathname) = split(/:/, $path_info, 2);
 543         if (defined $pathname) {
 544                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 545                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 546                 $pathname =~ s,^/+,,;
 547                 if (!$pathname || substr($pathname, -1) eq "/") {
 548                         $action  ||= "tree";
 549                         $pathname =~ s,/$,,;
 550                 } else {
 551                         $action  ||= "blob_plain";
 552                 }
 553                 $hash_base ||= validate_refname($refname);
 554                 $file_name ||= validate_pathname($pathname);
 555         } elsif (defined $refname) {
 556                 # we got "project.git/branch"
 557                 $action ||= "shortlog";
 558                 $hash   ||= validate_refname($refname);
 559         }
 560 }
 561 evaluate_path_info();
 562
 563 # path to the current git repository
 564 our $git_dir;
 565 $git_dir = "$projectroot/$project" if $project;
 566
 567 # dispatch
 568 my %actions = (
 569         "blame" => \&git_blame,
 570         "blobdiff" => \&git_blobdiff,
 571         "blobdiff_plain" => \&git_blobdiff_plain,
 572         "blob" => \&git_blob,
 573         "blob_plain" => \&git_blob_plain,
 574         "commitdiff" => \&git_commitdiff,
 575         "commitdiff_plain" => \&git_commitdiff_plain,
 576         "commit" => \&git_commit,
 577         "forks" => \&git_forks,
 578         "heads" => \&git_heads,
 579         "history" => \&git_history,
 580         "log" => \&git_log,
 581         "rss" => \&git_rss,
 582         "atom" => \&git_atom,
 583         "search" => \&git_search,
 584         "search_help" => \&git_search_help,
 585         "shortlog" => \&git_shortlog,
 586         "summary" => \&git_summary,
 587         "tag" => \&git_tag,
 588         "tags" => \&git_tags,
 589         "tree" => \&git_tree,
 590         "snapshot" => \&git_snapshot,
 591         "object" => \&git_object,
 592         # those below don't need $project
 593         "opml" => \&git_opml,
 594         "project_list" => \&git_project_list,
 595         "project_index" => \&git_project_index,
 596 );
 597
 598 if (!defined $action) {
 599         if (defined $hash) {
 600                 $action = git_get_type($hash);
 601         } elsif (defined $hash_base && defined $file_name) {
 602                 $action = git_get_type("$hash_base:$file_name");
 603         } elsif (defined $project) {
 604                 $action = 'summary';
 605         } else {
 606                 $action = 'project_list';
 607         }
 608 }
 609 if (!defined($actions{$action})) {
 610         die_error(400, "Unknown action");
 611 }
 612 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 613     !$project) {
 614         die_error(400, "Project needed");
 615 }
 616 $actions{$action}->();
 617 exit;
 618
 619 ## ======================================================================
 620 ## action links
 621
 622 sub href (%) {
 623         my %params = @_;
 624         # default is to use -absolute url() i.e. $my_uri
 625         my $href = $params{-full} ? $my_url : $my_uri;
 626
 627         # XXX: Warning: If you touch this, check the search form for updating,
 628         # too.
 629
 630         my @mapping = (
 631                 project => "p",
 632                 action => "a",
 633                 file_name => "f",
 634                 file_parent => "fp",
 635                 hash => "h",
 636                 hash_parent => "hp",
 637                 hash_base => "hb",
 638                 hash_parent_base => "hpb",
 639                 page => "pg",
 640                 order => "o",
 641                 searchtext => "s",
 642                 searchtype => "st",
 643                 snapshot_format => "sf",
 644                 extra_options => "opt",
 645                 search_use_regexp => "sr",
 646         );
 647         my %mapping = @mapping;
 648
 649         $params{'project'} = $project unless exists $params{'project'};
 650
 651         if ($params{-replay}) {
 652                 while (my ($name, $symbol) = each %mapping) {
 653                         if (!exists $params{$name}) {
 654                                 # to allow for multivalued params we use arrayref form
 655                                 $params{$name} = [ $cgi->param($symbol) ];
 656                         }
 657                 }
 658         }
 659
 660         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 661         if ($use_pathinfo) {
 662                 # use PATH_INFO for project name
 663                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 664                 delete $params{'project'};
 665
 666                 # Summary just uses the project path URL
 667                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 668                         delete $params{'action'};
 669                 }
 670         }
 671
 672         # now encode the parameters explicitly
 673         my @result = ();
 674         for (my $i = 0; $i < @mapping; $i += 2) {
 675                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 676                 if (defined $params{$name}) {
 677                         if (ref($params{$name}) eq "ARRAY") {
 678                                 foreach my $par (@{$params{$name}}) {
 679                                         push @result, $symbol . "=" . esc_param($par);
 680                                 }
 681                         } else {
 682                                 push @result, $symbol . "=" . esc_param($params{$name});
 683                         }
 684                 }
 685         }
 686         $href .= "?" . join(';', @result) if scalar @result;
 687
 688         return $href;
 689 }
 690
 691
 692 ## ======================================================================
 693 ## validation, quoting/unquoting and escaping
 694
 695 sub validate_pathname {
 696         my $input = shift || return undef;
 697
 698         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 699         # at the beginning, at the end, and between slashes.
 700         # also this catches doubled slashes
 701         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 702                 return undef;
 703         }
 704         # no null characters
 705         if ($input =~ m!\0!) {
 706                 return undef;
 707         }
 708         return $input;
 709 }
 710
 711 sub validate_refname {
 712         my $input = shift || return undef;
 713
 714         # textual hashes are O.K.
 715         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 716                 return $input;
 717         }
 718         # it must be correct pathname
 719         $input = validate_pathname($input)
 720                 or return undef;
 721         # restrictions on ref name according to git-check-ref-format
 722         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 723                 return undef;
 724         }
 725         return $input;
 726 }
 727
 728 # decode sequences of octets in utf8 into Perl's internal form,
 729 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 730 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 731 sub to_utf8 {
 732         my $str = shift;
 733         if (utf8::valid($str)) {
 734                 utf8::decode($str);
 735                 return $str;
 736         } else {
 737                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 738         }
 739 }
 740
 741 # quote unsafe chars, but keep the slash, even when it's not
 742 # correct, but quoted slashes look too horrible in bookmarks
 743 sub esc_param {
 744         my $str = shift;
 745         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 746         $str =~ s/\+/%2B/g;
 747         $str =~ s/ /\+/g;
 748         return $str;
 749 }
 750
 751 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 752 sub esc_url {
 753         my $str = shift;
 754         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 755         $str =~ s/\+/%2B/g;
 756         $str =~ s/ /\+/g;
 757         return $str;
 758 }
 759
 760 # replace invalid utf8 character with SUBSTITUTION sequence
 761 sub esc_html ($;%) {
 762         my $str = shift;
 763         my %opts = @_;
 764
 765         $str = to_utf8($str);
 766         $str = $cgi->escapeHTML($str);
 767         if ($opts{'-nbsp'}) {
 768                 $str =~ s/ /&nbsp;/g;
 769         }
 770         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 771         return $str;
 772 }
 773
 774 # quote control characters and escape filename to HTML
 775 sub esc_path {
 776         my $str = shift;
 777         my %opts = @_;
 778
 779         $str = to_utf8($str);
 780         $str = $cgi->escapeHTML($str);
 781         if ($opts{'-nbsp'}) {
 782                 $str =~ s/ /&nbsp;/g;
 783         }
 784         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 785         return $str;
 786 }
 787
 788 # Make control characters "printable", using character escape codes (CEC)
 789 sub quot_cec {
 790         my $cntrl = shift;
 791         my %opts = @_;
 792         my %es = ( # character escape codes, aka escape sequences
 793                 "\t" => '\t',   # tab            (HT)
 794                 "\n" => '\n',   # line feed      (LF)
 795                 "\r" => '\r',   # carrige return (CR)
 796                 "\f" => '\f',   # form feed      (FF)
 797                 "\b" => '\b',   # backspace      (BS)
 798                 "\a" => '\a',   # alarm (bell)   (BEL)
 799                 "\e" => '\e',   # escape         (ESC)
 800                 "\013" => '\v', # vertical tab   (VT)
 801                 "\000" => '\0', # nul character  (NUL)
 802         );
 803         my $chr = ( (exists $es{$cntrl})
 804                     ? $es{$cntrl}
 805                     : sprintf('\%2x', ord($cntrl)) );
 806         if ($opts{-nohtml}) {
 807                 return $chr;
 808         } else {
 809                 return "<span class=\"cntrl\">$chr</span>";
 810         }
 811 }
 812
 813 # Alternatively use unicode control pictures codepoints,
 814 # Unicode "printable representation" (PR)
 815 sub quot_upr {
 816         my $cntrl = shift;
 817         my %opts = @_;
 818
 819         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 820         if ($opts{-nohtml}) {
 821                 return $chr;
 822         } else {
 823                 return "<span class=\"cntrl\">$chr</span>";
 824         }
 825 }
 826
 827 # git may return quoted and escaped filenames
 828 sub unquote {
 829         my $str = shift;
 830
 831         sub unq {
 832                 my $seq = shift;
 833                 my %es = ( # character escape codes, aka escape sequences
 834                         't' => "\t",   # tab            (HT, TAB)
 835                         'n' => "\n",   # newline        (NL)
 836                         'r' => "\r",   # return         (CR)
 837                         'f' => "\f",   # form feed      (FF)
 838                         'b' => "\b",   # backspace      (BS)
 839                         'a' => "\a",   # alarm (bell)   (BEL)
 840                         'e' => "\e",   # escape         (ESC)
 841                         'v' => "\013", # vertical tab   (VT)
 842                 );
 843
 844                 if ($seq =~ m/^[0-7]{1,3}$/) {
 845                         # octal char sequence
 846                         return chr(oct($seq));
 847                 } elsif (exists $es{$seq}) {
 848                         # C escape sequence, aka character escape code
 849                         return $es{$seq};
 850                 }
 851                 # quoted ordinary character
 852                 return $seq;
 853         }
 854
 855         if ($str =~ m/^"(.*)"$/) {
 856                 # needs unquoting
 857                 $str = $1;
 858                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 859         }
 860         return $str;
 861 }
 862
 863 # escape tabs (convert tabs to spaces)
 864 sub untabify {
 865         my $line = shift;
 866
 867         while ((my $pos = index($line, "\t")) != -1) {
 868                 if (my $count = (8 - ($pos % 8))) {
 869                         my $spaces = ' ' x $count;
 870                         $line =~ s/\t/$spaces/;
 871                 }
 872         }
 873
 874         return $line;
 875 }
 876
 877 sub project_in_list {
 878         my $project = shift;
 879         my @list = git_get_projects_list();
 880         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 881 }
 882
 883 ## ----------------------------------------------------------------------
 884 ## HTML aware string manipulation
 885
 886 # Try to chop given string on a word boundary between position
 887 # $len and $len+$add_len. If there is no word boundary there,
 888 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 889 # (marking chopped part) would be longer than given string.
 890 sub chop_str {
 891         my $str = shift;
 892         my $len = shift;
 893         my $add_len = shift || 10;
 894         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 895
 896         # Make sure perl knows it is utf8 encoded so we don't
 897         # cut in the middle of a utf8 multibyte char.
 898         $str = to_utf8($str);
 899
 900         # allow only $len chars, but don't cut a word if it would fit in $add_len
 901         # if it doesn't fit, cut it if it's still longer than the dots we would add
 902         # remove chopped character entities entirely
 903
 904         # when chopping in the middle, distribute $len into left and right part
 905         # return early if chopping wouldn't make string shorter
 906         if ($where eq 'center') {
 907                 return $str if ($len + 5 >= length($str)); # filler is length 5
 908                 $len = int($len/2);
 909         } else {
 910                 return $str if ($len + 4 >= length($str)); # filler is length 4
 911         }
 912
 913         # regexps: ending and beginning with word part up to $add_len
 914         my $endre = qr/.{$len}\w{0,$add_len}/;
 915         my $begre = qr/\w{0,$add_len}.{$len}/;
 916
 917         if ($where eq 'left') {
 918                 $str =~ m/^(.*?)($begre)$/;
 919                 my ($lead, $body) = ($1, $2);
 920                 if (length($lead) > 4) {
 921                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 922                         $lead = " ...";
 923                 }
 924                 return "$lead$body";
 925
 926         } elsif ($where eq 'center') {
 927                 $str =~ m/^($endre)(.*)$/;
 928                 my ($left, $str)  = ($1, $2);
 929                 $str =~ m/^(.*?)($begre)$/;
 930                 my ($mid, $right) = ($1, $2);
 931                 if (length($mid) > 5) {
 932                         $left  =~ s/&[^;]*$//;
 933                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 934                         $mid = " ... ";
 935                 }
 936                 return "$left$mid$right";
 937
 938         } else {
 939                 $str =~ m/^($endre)(.*)$/;
 940                 my $body = $1;
 941                 my $tail = $2;
 942                 if (length($tail) > 4) {
 943                         $body =~ s/&[^;]*$//;
 944                         $tail = "... ";
 945                 }
 946                 return "$body$tail";
 947         }
 948 }
 949
 950 # takes the same arguments as chop_str, but also wraps a <span> around the
 951 # result with a title attribute if it does get chopped. Additionally, the
 952 # string is HTML-escaped.
 953 sub chop_and_escape_str {
 954         my ($str) = @_;
 955
 956         my $chopped = chop_str(@_);
 957         if ($chopped eq $str) {
 958                 return esc_html($chopped);
 959         } else {
 960                 $str =~ s/([[:cntrl:]])/?/g;
 961                 return $cgi->span({-title=>$str}, esc_html($chopped));
 962         }
 963 }
 964
 965 ## ----------------------------------------------------------------------
 966 ## functions returning short strings
 967
 968 # CSS class for given age value (in seconds)
 969 sub age_class {
 970         my $age = shift;
 971
 972         if (!defined $age) {
 973                 return "noage";
 974         } elsif ($age < 60*60*2) {
 975                 return "age0";
 976         } elsif ($age < 60*60*24*2) {
 977                 return "age1";
 978         } else {
 979                 return "age2";
 980         }
 981 }
 982
 983 # convert age in seconds to "nn units ago" string
 984 sub age_string {
 985         my $age = shift;
 986         my $age_str;
 987
 988         if ($age > 60*60*24*365*2) {
 989                 $age_str = (int $age/60/60/24/365);
 990                 $age_str .= " years ago";
 991         } elsif ($age > 60*60*24*(365/12)*2) {
 992                 $age_str = int $age/60/60/24/(365/12);
 993                 $age_str .= " months ago";
 994         } elsif ($age > 60*60*24*7*2) {
 995                 $age_str = int $age/60/60/24/7;
 996                 $age_str .= " weeks ago";
 997         } elsif ($age > 60*60*24*2) {
 998                 $age_str = int $age/60/60/24;
 999                 $age_str .= " days ago";
1000         } elsif ($age > 60*60*2) {
1001                 $age_str = int $age/60/60;
1002                 $age_str .= " hours ago";
1003         } elsif ($age > 60*2) {
1004                 $age_str = int $age/60;
1005                 $age_str .= " min ago";
1006         } elsif ($age > 2) {
1007                 $age_str = int $age;
1008                 $age_str .= " sec ago";
1009         } else {
1010                 $age_str .= " right now";
1011         }
1012         return $age_str;
1013 }
1014
1015 use constant {
1016         S_IFINVALID => 0030000,
1017         S_IFGITLINK => 0160000,
1018 };
1019
1020 # submodule/subproject, a commit object reference
1021 sub S_ISGITLINK($) {
1022         my $mode = shift;
1023
1024         return (($mode & S_IFMT) == S_IFGITLINK)
1025 }
1026
1027 # convert file mode in octal to symbolic file mode string
1028 sub mode_str {
1029         my $mode = oct shift;
1030
1031         if (S_ISGITLINK($mode)) {
1032                 return 'm---------';
1033         } elsif (S_ISDIR($mode & S_IFMT)) {
1034                 return 'drwxr-xr-x';
1035         } elsif (S_ISLNK($mode)) {
1036                 return 'lrwxrwxrwx';
1037         } elsif (S_ISREG($mode)) {
1038                 # git cares only about the executable bit
1039                 if ($mode & S_IXUSR) {
1040                         return '-rwxr-xr-x';
1041                 } else {
1042                         return '-rw-r--r--';
1043                 };
1044         } else {
1045                 return '----------';
1046         }
1047 }
1048
1049 # convert file mode in octal to file type string
1050 sub file_type {
1051         my $mode = shift;
1052
1053         if ($mode !~ m/^[0-7]+$/) {
1054                 return $mode;
1055         } else {
1056                 $mode = oct $mode;
1057         }
1058
1059         if (S_ISGITLINK($mode)) {
1060                 return "submodule";
1061         } elsif (S_ISDIR($mode & S_IFMT)) {
1062                 return "directory";
1063         } elsif (S_ISLNK($mode)) {
1064                 return "symlink";
1065         } elsif (S_ISREG($mode)) {
1066                 return "file";
1067         } else {
1068                 return "unknown";
1069         }
1070 }
1071
1072 # convert file mode in octal to file type description string
1073 sub file_type_long {
1074         my $mode = shift;
1075
1076         if ($mode !~ m/^[0-7]+$/) {
1077                 return $mode;
1078         } else {
1079                 $mode = oct $mode;
1080         }
1081
1082         if (S_ISGITLINK($mode)) {
1083                 return "submodule";
1084         } elsif (S_ISDIR($mode & S_IFMT)) {
1085                 return "directory";
1086         } elsif (S_ISLNK($mode)) {
1087                 return "symlink";
1088         } elsif (S_ISREG($mode)) {
1089                 if ($mode & S_IXUSR) {
1090                         return "executable";
1091                 } else {
1092                         return "file";
1093                 };
1094         } else {
1095                 return "unknown";
1096         }
1097 }
1098
1099
1100 ## ----------------------------------------------------------------------
1101 ## functions returning short HTML fragments, or transforming HTML fragments
1102 ## which don't belong to other sections
1103
1104 # format line of commit message.
1105 sub format_log_line_html {
1106         my $line = shift;
1107
1108         $line = esc_html($line, -nbsp=>1);
1109         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1110                 my $hash_text = $1;
1111                 my $link =
1112                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1113                                 -class => "text"}, $hash_text);
1114                 $line =~ s/$hash_text/$link/;
1115         }
1116         return $line;
1117 }
1118
1119 # format marker of refs pointing to given object
1120
1121 # the destination action is chosen based on object type and current context:
1122 # - for annotated tags, we choose the tag view unless it's the current view
1123 #   already, in which case we go to shortlog view
1124 # - for other refs, we keep the current view if we're in history, shortlog or
1125 #   log view, and select shortlog otherwise
1126 sub format_ref_marker {
1127         my ($refs, $id) = @_;
1128         my $markers = '';
1129
1130         if (defined $refs->{$id}) {
1131                 foreach my $ref (@{$refs->{$id}}) {
1132                         # this code exploits the fact that non-lightweight tags are the
1133                         # only indirect objects, and that they are the only objects for which
1134                         # we want to use tag instead of shortlog as action
1135                         my ($type, $name) = qw();
1136                         my $indirect = ($ref =~ s/\^\{\}$//);
1137                         # e.g. tags/v2.6.11 or heads/next
1138                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1139                                 $type = $1;
1140                                 $name = $2;
1141                         } else {
1142                                 $type = "ref";
1143                                 $name = $ref;
1144                         }
1145
1146                         my $class = $type;
1147                         $class .= " indirect" if $indirect;
1148
1149                         my $dest_action = "shortlog";
1150
1151                         if ($indirect) {
1152                                 $dest_action = "tag" unless $action eq "tag";
1153                         } elsif ($action =~ /^(history|(short)?log)$/) {
1154                                 $dest_action = $action;
1155                         }
1156
1157                         my $dest = "";
1158                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1159                         $dest .= $ref;
1160
1161                         my $link = $cgi->a({
1162                                 -href => href(
1163                                         action=>$dest_action,
1164                                         hash=>$dest
1165                                 )}, $name);
1166
1167                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1168                                 $link . "</span>";
1169                 }
1170         }
1171
1172         if ($markers) {
1173                 return ' <span class="refs">'. $markers . '</span>';
1174         } else {
1175                 return "";
1176         }
1177 }
1178
1179 # format, perhaps shortened and with markers, title line
1180 sub format_subject_html {
1181         my ($long, $short, $href, $extra) = @_;
1182         $extra = '' unless defined($extra);
1183
1184         if (length($short) < length($long)) {
1185                 return $cgi->a({-href => $href, -class => "list subject",
1186                                 -title => to_utf8($long)},
1187                        esc_html($short) . $extra);
1188         } else {
1189                 return $cgi->a({-href => $href, -class => "list subject"},
1190                        esc_html($long)  . $extra);
1191         }
1192 }
1193
1194 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1195 sub format_git_diff_header_line {
1196         my $line = shift;
1197         my $diffinfo = shift;
1198         my ($from, $to) = @_;
1199
1200         if ($diffinfo->{'nparents'}) {
1201                 # combined diff
1202                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1203                 if ($to->{'href'}) {
1204                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1205                                          esc_path($to->{'file'}));
1206                 } else { # file was deleted (no href)
1207                         $line .= esc_path($to->{'file'});
1208                 }
1209         } else {
1210                 # "ordinary" diff
1211                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1212                 if ($from->{'href'}) {
1213                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1214                                          'a/' . esc_path($from->{'file'}));
1215                 } else { # file was added (no href)
1216                         $line .= 'a/' . esc_path($from->{'file'});
1217                 }
1218                 $line .= ' ';
1219                 if ($to->{'href'}) {
1220                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1221                                          'b/' . esc_path($to->{'file'}));
1222                 } else { # file was deleted
1223                         $line .= 'b/' . esc_path($to->{'file'});
1224                 }
1225         }
1226
1227         return "<div class=\"diff header\">$line</div>\n";
1228 }
1229
1230 # format extended diff header line, before patch itself
1231 sub format_extended_diff_header_line {
1232         my $line = shift;
1233         my $diffinfo = shift;
1234         my ($from, $to) = @_;
1235
1236         # match <path>
1237         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1238                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1239                                        esc_path($from->{'file'}));
1240         }
1241         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1242                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1243                                  esc_path($to->{'file'}));
1244         }
1245         # match single <mode>
1246         if ($line =~ m/\s(\d{6})$/) {
1247                 $line .= '<span class="info"> (' .
1248                          file_type_long($1) .
1249                          ')</span>';
1250         }
1251         # match <hash>
1252         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1253                 # can match only for combined diff
1254                 $line = 'index ';
1255                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1256                         if ($from->{'href'}[$i]) {
1257                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1258                                                   -class=>"hash"},
1259                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1260                         } else {
1261                                 $line .= '0' x 7;
1262                         }
1263                         # separator
1264                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1265                 }
1266                 $line .= '..';
1267                 if ($to->{'href'}) {
1268                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1269                                          substr($diffinfo->{'to_id'},0,7));
1270                 } else {
1271                         $line .= '0' x 7;
1272                 }
1273
1274         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1275                 # can match only for ordinary diff
1276                 my ($from_link, $to_link);
1277                 if ($from->{'href'}) {
1278                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1279                                              substr($diffinfo->{'from_id'},0,7));
1280                 } else {
1281                         $from_link = '0' x 7;
1282                 }
1283                 if ($to->{'href'}) {
1284                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1285                                            substr($diffinfo->{'to_id'},0,7));
1286                 } else {
1287                         $to_link = '0' x 7;
1288                 }
1289                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1290                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1291         }
1292
1293         return $line . "<br/>\n";
1294 }
1295
1296 # format from-file/to-file diff header
1297 sub format_diff_from_to_header {
1298         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1299         my $line;
1300         my $result = '';
1301
1302         $line = $from_line;
1303         #assert($line =~ m/^---/) if DEBUG;
1304         # no extra formatting for "^--- /dev/null"
1305         if (! $diffinfo->{'nparents'}) {
1306                 # ordinary (single parent) diff
1307                 if ($line =~ m!^--- "?a/!) {
1308                         if ($from->{'href'}) {
1309                                 $line = '--- a/' .
1310                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1311                                                 esc_path($from->{'file'}));
1312                         } else {
1313                                 $line = '--- a/' .
1314                                         esc_path($from->{'file'});
1315                         }
1316                 }
1317                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1318
1319         } else {
1320                 # combined diff (merge commit)
1321                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1322                         if ($from->{'href'}[$i]) {
1323                                 $line = '--- ' .
1324                                         $cgi->a({-href=>href(action=>"blobdiff",
1325                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1326                                                              hash_parent_base=>$parents[$i],
1327                                                              file_parent=>$from->{'file'}[$i],
1328                                                              hash=>$diffinfo->{'to_id'},
1329                                                              hash_base=>$hash,
1330                                                              file_name=>$to->{'file'}),
1331                                                  -class=>"path",
1332                                                  -title=>"diff" . ($i+1)},
1333                                                 $i+1) .
1334                                         '/' .
1335                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1336                                                 esc_path($from->{'file'}[$i]));
1337                         } else {
1338                                 $line = '--- /dev/null';
1339                         }
1340                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1341                 }
1342         }
1343
1344         $line = $to_line;
1345         #assert($line =~ m/^\+\+\+/) if DEBUG;
1346         # no extra formatting for "^+++ /dev/null"
1347         if ($line =~ m!^\+\+\+ "?b/!) {
1348                 if ($to->{'href'}) {
1349                         $line = '+++ b/' .
1350                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1351                                         esc_path($to->{'file'}));
1352                 } else {
1353                         $line = '+++ b/' .
1354                                 esc_path($to->{'file'});
1355                 }
1356         }
1357         $result .= qq!<div class="diff to_file">$line</div>\n!;
1358
1359         return $result;
1360 }
1361
1362 # create note for patch simplified by combined diff
1363 sub format_diff_cc_simplified {
1364         my ($diffinfo, @parents) = @_;
1365         my $result = '';
1366
1367         $result .= "<div class=\"diff header\">" .
1368                    "diff --cc ";
1369         if (!is_deleted($diffinfo)) {
1370                 $result .= $cgi->a({-href => href(action=>"blob",
1371                                                   hash_base=>$hash,
1372                                                   hash=>$diffinfo->{'to_id'},
1373                                                   file_name=>$diffinfo->{'to_file'}),
1374                                     -class => "path"},
1375                                    esc_path($diffinfo->{'to_file'}));
1376         } else {
1377                 $result .= esc_path($diffinfo->{'to_file'});
1378         }
1379         $result .= "</div>\n" . # class="diff header"
1380                    "<div class=\"diff nodifferences\">" .
1381                    "Simple merge" .
1382                    "</div>\n"; # class="diff nodifferences"
1383
1384         return $result;
1385 }
1386
1387 # format patch (diff) line (not to be used for diff headers)
1388 sub format_diff_line {
1389         my $line = shift;
1390         my ($from, $to) = @_;
1391         my $diff_class = "";
1392
1393         chomp $line;
1394
1395         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1396                 # combined diff
1397                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1398                 if ($line =~ m/^\@{3}/) {
1399                         $diff_class = " chunk_header";
1400                 } elsif ($line =~ m/^\\/) {
1401                         $diff_class = " incomplete";
1402                 } elsif ($prefix =~ tr/+/+/) {
1403                         $diff_class = " add";
1404                 } elsif ($prefix =~ tr/-/-/) {
1405                         $diff_class = " rem";
1406                 }
1407         } else {
1408                 # assume ordinary diff
1409                 my $char = substr($line, 0, 1);
1410                 if ($char eq '+') {
1411                         $diff_class = " add";
1412                 } elsif ($char eq '-') {
1413                         $diff_class = " rem";
1414                 } elsif ($char eq '@') {
1415                         $diff_class = " chunk_header";
1416                 } elsif ($char eq "\\") {
1417                         $diff_class = " incomplete";
1418                 }
1419         }
1420         $line = untabify($line);
1421         if ($from && $to && $line =~ m/^\@{2} /) {
1422                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1423                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1424
1425                 $from_lines = 0 unless defined $from_lines;
1426                 $to_lines   = 0 unless defined $to_lines;
1427
1428                 if ($from->{'href'}) {
1429                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1430                                              -class=>"list"}, $from_text);
1431                 }
1432                 if ($to->{'href'}) {
1433                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1434                                              -class=>"list"}, $to_text);
1435                 }
1436                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1437                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1438                 return "<div class=\"diff$diff_class\">$line</div>\n";
1439         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1440                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1441                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1442
1443                 @from_text = split(' ', $ranges);
1444                 for (my $i = 0; $i < @from_text; ++$i) {
1445                         ($from_start[$i], $from_nlines[$i]) =
1446                                 (split(',', substr($from_text[$i], 1)), 0);
1447                 }
1448
1449                 $to_text   = pop @from_text;
1450                 $to_start  = pop @from_start;
1451                 $to_nlines = pop @from_nlines;
1452
1453                 $line = "<span class=\"chunk_info\">$prefix ";
1454                 for (my $i = 0; $i < @from_text; ++$i) {
1455                         if ($from->{'href'}[$i]) {
1456                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1457                                                   -class=>"list"}, $from_text[$i]);
1458                         } else {
1459                                 $line .= $from_text[$i];
1460                         }
1461                         $line .= " ";
1462                 }
1463                 if ($to->{'href'}) {
1464                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1465                                           -class=>"list"}, $to_text);
1466                 } else {
1467                         $line .= $to_text;
1468                 }
1469                 $line .= " $prefix</span>" .
1470                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1471                 return "<div class=\"diff$diff_class\">$line</div>\n";
1472         }
1473         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1474 }
1475
1476 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1477 # linked.  Pass the hash of the tree/commit to snapshot.
1478 sub format_snapshot_links {
1479         my ($hash) = @_;
1480         my @snapshot_fmts = gitweb_check_feature('snapshot');
1481         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1482         my $num_fmts = @snapshot_fmts;
1483         if ($num_fmts > 1) {
1484                 # A parenthesized list of links bearing format names.
1485                 # e.g. "snapshot (_tar.gz_ _zip_)"
1486                 return "snapshot (" . join(' ', map
1487                         $cgi->a({
1488                                 -href => href(
1489                                         action=>"snapshot",
1490                                         hash=>$hash,
1491                                         snapshot_format=>$_
1492                                 )
1493                         }, $known_snapshot_formats{$_}{'display'})
1494                 , @snapshot_fmts) . ")";
1495         } elsif ($num_fmts == 1) {
1496                 # A single "snapshot" link whose tooltip bears the format name.
1497                 # i.e. "_snapshot_"
1498                 my ($fmt) = @snapshot_fmts;
1499                 return
1500                         $cgi->a({
1501                                 -href => href(
1502                                         action=>"snapshot",
1503                                         hash=>$hash,
1504                                         snapshot_format=>$fmt
1505                                 ),
1506                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1507                         }, "snapshot");
1508         } else { # $num_fmts == 0
1509                 return undef;
1510         }
1511 }
1512
1513 ## ......................................................................
1514 ## functions returning values to be passed, perhaps after some
1515 ## transformation, to other functions; e.g. returning arguments to href()
1516
1517 # returns hash to be passed to href to generate gitweb URL
1518 # in -title key it returns description of link
1519 sub get_feed_info {
1520         my $format = shift || 'Atom';
1521         my %res = (action => lc($format));
1522
1523         # feed links are possible only for project views
1524         return unless (defined $project);
1525         # some views should link to OPML, or to generic project feed,
1526         # or don't have specific feed yet (so they should use generic)
1527         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1528
1529         my $branch;
1530         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1531         # from tag links; this also makes possible to detect branch links
1532         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1533             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1534                 $branch = $1;
1535         }
1536         # find log type for feed description (title)
1537         my $type = 'log';
1538         if (defined $file_name) {
1539                 $type  = "history of $file_name";
1540                 $type .= "/" if ($action eq 'tree');
1541                 $type .= " on '$branch'" if (defined $branch);
1542         } else {
1543                 $type = "log of $branch" if (defined $branch);
1544         }
1545
1546         $res{-title} = $type;
1547         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1548         $res{'file_name'} = $file_name;
1549
1550         return %res;
1551 }
1552
1553 ## ----------------------------------------------------------------------
1554 ## git utility subroutines, invoking git commands
1555
1556 # returns path to the core git executable and the --git-dir parameter as list
1557 sub git_cmd {
1558         return $GIT, '--git-dir='.$git_dir;
1559 }
1560
1561 # quote the given arguments for passing them to the shell
1562 # quote_command("command", "arg 1", "arg with ' and ! characters")
1563 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1564 # Try to avoid using this function wherever possible.
1565 sub quote_command {
1566         return join(' ',
1567                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1568 }
1569
1570 # get HEAD ref of given project as hash
1571 sub git_get_head_hash {
1572         my $project = shift;
1573         my $o_git_dir = $git_dir;
1574         my $retval = undef;
1575         $git_dir = "$projectroot/$project";
1576         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1577                 my $head = <$fd>;
1578                 close $fd;
1579                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1580                         $retval = $1;
1581                 }
1582         }
1583         if (defined $o_git_dir) {
1584                 $git_dir = $o_git_dir;
1585         }
1586         return $retval;
1587 }
1588
1589 # get type of given object
1590 sub git_get_type {
1591         my $hash = shift;
1592
1593         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1594         my $type = <$fd>;
1595         close $fd or return;
1596         chomp $type;
1597         return $type;
1598 }
1599
1600 # repository configuration
1601 our $config_file = '';
1602 our %config;
1603
1604 # store multiple values for single key as anonymous array reference
1605 # single values stored directly in the hash, not as [ <value> ]
1606 sub hash_set_multi {
1607         my ($hash, $key, $value) = @_;
1608
1609         if (!exists $hash->{$key}) {
1610                 $hash->{$key} = $value;
1611         } elsif (!ref $hash->{$key}) {
1612                 $hash->{$key} = [ $hash->{$key}, $value ];
1613         } else {
1614                 push @{$hash->{$key}}, $value;
1615         }
1616 }
1617
1618 # return hash of git project configuration
1619 # optionally limited to some section, e.g. 'gitweb'
1620 sub git_parse_project_config {
1621         my $section_regexp = shift;
1622         my %config;
1623
1624         local $/ = "\0";
1625
1626         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1627                 or return;
1628
1629         while (my $keyval = <$fh>) {
1630                 chomp $keyval;
1631                 my ($key, $value) = split(/\n/, $keyval, 2);
1632
1633                 hash_set_multi(\%config, $key, $value)
1634                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1635         }
1636         close $fh;
1637
1638         return %config;
1639 }
1640
1641 # convert config value to boolean, 'true' or 'false'
1642 # no value, number > 0, 'true' and 'yes' values are true
1643 # rest of values are treated as false (never as error)
1644 sub config_to_bool {
1645         my $val = shift;
1646
1647         # strip leading and trailing whitespace
1648         $val =~ s/^\s+//;
1649         $val =~ s/\s+$//;
1650
1651         return (!defined $val ||               # section.key
1652                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1653                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1654 }
1655
1656 # convert config value to simple decimal number
1657 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1658 # to be multiplied by 1024, 1048576, or 1073741824
1659 sub config_to_int {
1660         my $val = shift;
1661
1662         # strip leading and trailing whitespace
1663         $val =~ s/^\s+//;
1664         $val =~ s/\s+$//;
1665
1666         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1667                 $unit = lc($unit);
1668                 # unknown unit is treated as 1
1669                 return $num * ($unit eq 'g' ? 1073741824 :
1670                                $unit eq 'm' ?    1048576 :
1671                                $unit eq 'k' ?       1024 : 1);
1672         }
1673         return $val;
1674 }
1675
1676 # convert config value to array reference, if needed
1677 sub config_to_multi {
1678         my $val = shift;
1679
1680         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1681 }
1682
1683 sub git_get_project_config {
1684         my ($key, $type) = @_;
1685
1686         # key sanity check
1687         return unless ($key);
1688         $key =~ s/^gitweb\.//;
1689         return if ($key =~ m/\W/);
1690
1691         # type sanity check
1692         if (defined $type) {
1693                 $type =~ s/^--//;
1694                 $type = undef
1695                         unless ($type eq 'bool' || $type eq 'int');
1696         }
1697
1698         # get config
1699         if (!defined $config_file ||
1700             $config_file ne "$git_dir/config") {
1701                 %config = git_parse_project_config('gitweb');
1702                 $config_file = "$git_dir/config";
1703         }
1704
1705         # ensure given type
1706         if (!defined $type) {
1707                 return $config{"gitweb.$key"};
1708         } elsif ($type eq 'bool') {
1709                 # backward compatibility: 'git config --bool' returns true/false
1710                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1711         } elsif ($type eq 'int') {
1712                 return config_to_int($config{"gitweb.$key"});
1713         }
1714         return $config{"gitweb.$key"};
1715 }
1716
1717 # get hash of given path at given ref
1718 sub git_get_hash_by_path {
1719         my $base = shift;
1720         my $path = shift || return undef;
1721         my $type = shift;
1722
1723         $path =~ s,/+$,,;
1724
1725         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1726                 or die_error(500, "Open git-ls-tree failed");
1727         my $line = <$fd>;
1728         close $fd or return undef;
1729
1730         if (!defined $line) {
1731                 # there is no tree or hash given by $path at $base
1732                 return undef;
1733         }
1734
1735         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1736         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1737         if (defined $type && $type ne $2) {
1738                 # type doesn't match
1739                 return undef;
1740         }
1741         return $3;
1742 }
1743
1744 # get path of entry with given hash at given tree-ish (ref)
1745 # used to get 'from' filename for combined diff (merge commit) for renames
1746 sub git_get_path_by_hash {
1747         my $base = shift || return;
1748         my $hash = shift || return;
1749
1750         local $/ = "\0";
1751
1752         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1753                 or return undef;
1754         while (my $line = <$fd>) {
1755                 chomp $line;
1756
1757                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1758                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1759                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1760                         close $fd;
1761                         return $1;
1762                 }
1763         }
1764         close $fd;
1765         return undef;
1766 }
1767
1768 ## ......................................................................
1769 ## git utility functions, directly accessing git repository
1770
1771 sub git_get_project_description {
1772         my $path = shift;
1773
1774         $git_dir = "$projectroot/$path";
1775         open my $fd, "$git_dir/description"
1776                 or return git_get_project_config('description');
1777         my $descr = <$fd>;
1778         close $fd;
1779         if (defined $descr) {
1780                 chomp $descr;
1781         }
1782         return $descr;
1783 }
1784
1785 sub git_get_project_url_list {
1786         my $path = shift;
1787
1788         $git_dir = "$projectroot/$path";
1789         open my $fd, "$git_dir/cloneurl"
1790                 or return wantarray ?
1791                 @{ config_to_multi(git_get_project_config('url')) } :
1792                    config_to_multi(git_get_project_config('url'));
1793         my @git_project_url_list = map { chomp; $_ } <$fd>;
1794         close $fd;
1795
1796         return wantarray ? @git_project_url_list : \@git_project_url_list;
1797 }
1798
1799 sub git_get_projects_list {
1800         my ($filter) = @_;
1801         my @list;
1802
1803         $filter ||= '';
1804         $filter =~ s/\.git$//;
1805
1806         my ($check_forks) = gitweb_check_feature('forks');
1807
1808         if (-d $projects_list) {
1809                 # search in directory
1810                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1811                 # remove the trailing "/"
1812                 $dir =~ s!/+$!!;
1813                 my $pfxlen = length("$dir");
1814                 my $pfxdepth = ($dir =~ tr!/!!);
1815
1816                 File::Find::find({
1817                         follow_fast => 1, # follow symbolic links
1818                         follow_skip => 2, # ignore duplicates
1819                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1820                         wanted => sub {
1821                                 # skip project-list toplevel, if we get it.
1822                                 return if (m!^[/.]$!);
1823                                 # only directories can be git repositories
1824                                 return unless (-d $_);
1825                                 # don't traverse too deep (Find is super slow on os x)
1826                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1827                                         $File::Find::prune = 1;
1828                                         return;
1829                                 }
1830
1831                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1832                                 # we check related file in $projectroot
1833                                 if ($check_forks and $subdir =~ m#/.#) {
1834                                         $File::Find::prune = 1;
1835                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1836                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1837                                         $File::Find::prune = 1;
1838                                 }
1839                         },
1840                 }, "$dir");
1841
1842         } elsif (-f $projects_list) {
1843                 # read from file(url-encoded):
1844                 # 'git%2Fgit.git Linus+Torvalds'
1845                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1846                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1847                 my %paths;
1848                 open my ($fd), $projects_list or return;
1849         PROJECT:
1850                 while (my $line = <$fd>) {
1851                         chomp $line;
1852                         my ($path, $owner) = split ' ', $line;
1853                         $path = unescape($path);
1854                         $owner = unescape($owner);
1855                         if (!defined $path) {
1856                                 next;
1857                         }
1858                         if ($filter ne '') {
1859                                 # looking for forks;
1860                                 my $pfx = substr($path, 0, length($filter));
1861                                 if ($pfx ne $filter) {
1862                                         next PROJECT;
1863                                 }
1864                                 my $sfx = substr($path, length($filter));
1865                                 if ($sfx !~ /^\/.*\.git$/) {
1866                                         next PROJECT;
1867                                 }
1868                         } elsif ($check_forks) {
1869                         PATH:
1870                                 foreach my $filter (keys %paths) {
1871                                         # looking for forks;
1872                                         my $pfx = substr($path, 0, length($filter));
1873                                         if ($pfx ne $filter) {
1874                                                 next PATH;
1875                                         }
1876                                         my $sfx = substr($path, length($filter));
1877                                         if ($sfx !~ /^\/.*\.git$/) {
1878                                                 next PATH;
1879                                         }
1880                                         # is a fork, don't include it in
1881                                         # the list
1882                                         next PROJECT;
1883                                 }
1884                         }
1885                         if (check_export_ok("$projectroot/$path")) {
1886                                 my $pr = {
1887                                         path => $path,
1888                                         owner => to_utf8($owner),
1889                                 };
1890                                 push @list, $pr;
1891                                 (my $forks_path = $path) =~ s/\.git$//;
1892                                 $paths{$forks_path}++;
1893                         }
1894                 }
1895                 close $fd;
1896         }
1897         return @list;
1898 }
1899
1900 our $gitweb_project_owner = undef;
1901 sub git_get_project_list_from_file {
1902
1903         return if (defined $gitweb_project_owner);
1904
1905         $gitweb_project_owner = {};
1906         # read from file (url-encoded):
1907         # 'git%2Fgit.git Linus+Torvalds'
1908         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1909         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1910         if (-f $projects_list) {
1911                 open (my $fd , $projects_list);
1912                 while (my $line = <$fd>) {
1913                         chomp $line;
1914                         my ($pr, $ow) = split ' ', $line;
1915                         $pr = unescape($pr);
1916                         $ow = unescape($ow);
1917                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1918                 }
1919                 close $fd;
1920         }
1921 }
1922
1923 sub git_get_project_owner {
1924         my $project = shift;
1925         my $owner;
1926
1927         return undef unless $project;
1928         $git_dir = "$projectroot/$project";
1929
1930         if (!defined $gitweb_project_owner) {
1931                 git_get_project_list_from_file();
1932         }
1933
1934         if (exists $gitweb_project_owner->{$project}) {
1935                 $owner = $gitweb_project_owner->{$project};
1936         }
1937         if (!defined $owner){
1938                 $owner = git_get_project_config('owner');
1939         }
1940         if (!defined $owner) {
1941                 $owner = get_file_owner("$git_dir");
1942         }
1943
1944         return $owner;
1945 }
1946
1947 sub git_get_last_activity {
1948         my ($path) = @_;
1949         my $fd;
1950
1951         $git_dir = "$projectroot/$path";
1952         open($fd, "-|", git_cmd(), 'for-each-ref',
1953              '--format=%(committer)',
1954              '--sort=-committerdate',
1955              '--count=1',
1956              'refs/heads') or return;
1957         my $most_recent = <$fd>;
1958         close $fd or return;
1959         if (defined $most_recent &&
1960             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1961                 my $timestamp = $1;
1962                 my $age = time - $timestamp;
1963                 return ($age, age_string($age));
1964         }
1965         return (undef, undef);
1966 }
1967
1968 sub git_get_references {
1969         my $type = shift || "";
1970         my %refs;
1971         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1972         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1973         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1974                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1975                 or return;
1976
1977         while (my $line = <$fd>) {
1978                 chomp $line;
1979                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
1980                         if (defined $refs{$1}) {
1981                                 push @{$refs{$1}}, $2;
1982                         } else {
1983                                 $refs{$1} = [ $2 ];
1984                         }
1985                 }
1986         }
1987         close $fd or return;
1988         return \%refs;
1989 }
1990
1991 sub git_get_rev_name_tags {
1992         my $hash = shift || return undef;
1993
1994         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1995                 or return;
1996         my $name_rev = <$fd>;
1997         close $fd;
1998
1999         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2000                 return $1;
2001         } else {
2002                 # catches also '$hash undefined' output
2003                 return undef;
2004         }
2005 }
2006
2007 ## ----------------------------------------------------------------------
2008 ## parse to hash functions
2009
2010 sub parse_date {
2011         my $epoch = shift;
2012         my $tz = shift || "-0000";
2013
2014         my %date;
2015         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2016         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2017         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2018         $date{'hour'} = $hour;
2019         $date{'minute'} = $min;
2020         $date{'mday'} = $mday;
2021         $date{'day'} = $days[$wday];
2022         $date{'month'} = $months[$mon];
2023         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2024                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2025         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2026                              $mday, $months[$mon], $hour ,$min;
2027         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2028                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2029
2030         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2031         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2032         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2033         $date{'hour_local'} = $hour;
2034         $date{'minute_local'} = $min;
2035         $date{'tz_local'} = $tz;
2036         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2037                                   1900+$year, $mon+1, $mday,
2038                                   $hour, $min, $sec, $tz);
2039         return %date;
2040 }
2041
2042 sub parse_tag {
2043         my $tag_id = shift;
2044         my %tag;
2045         my @comment;
2046
2047         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2048         $tag{'id'} = $tag_id;
2049         while (my $line = <$fd>) {
2050                 chomp $line;
2051                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2052                         $tag{'object'} = $1;
2053                 } elsif ($line =~ m/^type (.+)$/) {
2054                         $tag{'type'} = $1;
2055                 } elsif ($line =~ m/^tag (.+)$/) {
2056                         $tag{'name'} = $1;
2057                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2058                         $tag{'author'} = $1;
2059                         $tag{'epoch'} = $2;
2060                         $tag{'tz'} = $3;
2061                 } elsif ($line =~ m/--BEGIN/) {
2062                         push @comment, $line;
2063                         last;
2064                 } elsif ($line eq "") {
2065                         last;
2066                 }
2067         }
2068         push @comment, <$fd>;
2069         $tag{'comment'} = \@comment;
2070         close $fd or return;
2071         if (!defined $tag{'name'}) {
2072                 return
2073         };
2074         return %tag
2075 }
2076
2077 sub parse_commit_text {
2078         my ($commit_text, $withparents) = @_;
2079         my @commit_lines = split '\n', $commit_text;
2080         my %co;
2081
2082         pop @commit_lines; # Remove '\0'
2083
2084         if (! @commit_lines) {
2085                 return;
2086         }
2087
2088         my $header = shift @commit_lines;
2089         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2090                 return;
2091         }
2092         ($co{'id'}, my @parents) = split ' ', $header;
2093         while (my $line = shift @commit_lines) {
2094                 last if $line eq "\n";
2095                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2096                         $co{'tree'} = $1;
2097                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2098                         push @parents, $1;
2099                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2100                         $co{'author'} = $1;
2101                         $co{'author_epoch'} = $2;
2102                         $co{'author_tz'} = $3;
2103                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2104                                 $co{'author_name'}  = $1;
2105                                 $co{'author_email'} = $2;
2106                         } else {
2107                                 $co{'author_name'} = $co{'author'};
2108                         }
2109                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2110                         $co{'committer'} = $1;
2111                         $co{'committer_epoch'} = $2;
2112                         $co{'committer_tz'} = $3;
2113                         $co{'committer_name'} = $co{'committer'};
2114                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2115                                 $co{'committer_name'}  = $1;
2116                                 $co{'committer_email'} = $2;
2117                         } else {
2118                                 $co{'committer_name'} = $co{'committer'};
2119                         }
2120                 }
2121         }
2122         if (!defined $co{'tree'}) {
2123                 return;
2124         };
2125         $co{'parents'} = \@parents;
2126         $co{'parent'} = $parents[0];
2127
2128         foreach my $title (@commit_lines) {
2129                 $title =~ s/^    //;
2130                 if ($title ne "") {
2131                         $co{'title'} = chop_str($title, 80, 5);
2132                         # remove leading stuff of merges to make the interesting part visible
2133                         if (length($title) > 50) {
2134                                 $title =~ s/^Automatic //;
2135                                 $title =~ s/^merge (of|with) /Merge ... /i;
2136                                 if (length($title) > 50) {
2137                                         $title =~ s/(http|rsync):\/\///;
2138                                 }
2139                                 if (length($title) > 50) {
2140                                         $title =~ s/(master|www|rsync)\.//;
2141                                 }
2142                                 if (length($title) > 50) {
2143                                         $title =~ s/kernel.org:?//;
2144                                 }
2145                                 if (length($title) > 50) {
2146                                         $title =~ s/\/pub\/scm//;
2147                                 }
2148                         }
2149                         $co{'title_short'} = chop_str($title, 50, 5);
2150                         last;
2151                 }
2152         }
2153         if (! defined $co{'title'} || $co{'title'} eq "") {
2154                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2155         }
2156         # remove added spaces
2157         foreach my $line (@commit_lines) {
2158                 $line =~ s/^    //;
2159         }
2160         $co{'comment'} = \@commit_lines;
2161
2162         my $age = time - $co{'committer_epoch'};
2163         $co{'age'} = $age;
2164         $co{'age_string'} = age_string($age);
2165         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2166         if ($age > 60*60*24*7*2) {
2167                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2168                 $co{'age_string_age'} = $co{'age_string'};
2169         } else {
2170                 $co{'age_string_date'} = $co{'age_string'};
2171                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2172         }
2173         return %co;
2174 }
2175
2176 sub parse_commit {
2177         my ($commit_id) = @_;
2178         my %co;
2179
2180         local $/ = "\0";
2181
2182         open my $fd, "-|", git_cmd(), "rev-list",
2183                 "--parents",
2184                 "--header",
2185                 "--max-count=1",
2186                 $commit_id,
2187                 "--",
2188                 or die_error(500, "Open git-rev-list failed");
2189         %co = parse_commit_text(<$fd>, 1);
2190         close $fd;
2191
2192         return %co;
2193 }
2194
2195 sub parse_commits {
2196         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2197         my @cos;
2198
2199         $maxcount ||= 1;
2200         $skip ||= 0;
2201
2202         local $/ = "\0";
2203
2204         open my $fd, "-|", git_cmd(), "rev-list",
2205                 "--header",
2206                 @args,
2207                 ("--max-count=" . $maxcount),
2208                 ("--skip=" . $skip),
2209                 @extra_options,
2210                 $commit_id,
2211                 "--",
2212                 ($filename ? ($filename) : ())
2213                 or die_error(500, "Open git-rev-list failed");
2214         while (my $line = <$fd>) {
2215                 my %co = parse_commit_text($line);
2216                 push @cos, \%co;
2217         }
2218         close $fd;
2219
2220         return wantarray ? @cos : \@cos;
2221 }
2222
2223 # parse line of git-diff-tree "raw" output
2224 sub parse_difftree_raw_line {
2225         my $line = shift;
2226         my %res;
2227
2228         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2229         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2230         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2231                 $res{'from_mode'} = $1;
2232                 $res{'to_mode'} = $2;
2233                 $res{'from_id'} = $3;
2234                 $res{'to_id'} = $4;
2235                 $res{'status'} = $5;
2236                 $res{'similarity'} = $6;
2237                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2238                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2239                 } else {
2240                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2241                 }
2242         }
2243         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2244         # combined diff (for merge commit)
2245         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2246                 $res{'nparents'}  = length($1);
2247                 $res{'from_mode'} = [ split(' ', $2) ];
2248                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2249                 $res{'from_id'} = [ split(' ', $3) ];
2250                 $res{'to_id'} = pop @{$res{'from_id'}};
2251                 $res{'status'} = [ split('', $4) ];
2252                 $res{'to_file'} = unquote($5);
2253         }
2254         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2255         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2256                 $res{'commit'} = $1;
2257         }
2258
2259         return wantarray ? %res : \%res;
2260 }
2261
2262 # wrapper: return parsed line of git-diff-tree "raw" output
2263 # (the argument might be raw line, or parsed info)
2264 sub parsed_difftree_line {
2265         my $line_or_ref = shift;
2266
2267         if (ref($line_or_ref) eq "HASH") {
2268                 # pre-parsed (or generated by hand)
2269                 return $line_or_ref;
2270         } else {
2271                 return parse_difftree_raw_line($line_or_ref);
2272         }
2273 }
2274
2275 # parse line of git-ls-tree output
2276 sub parse_ls_tree_line ($;%) {
2277         my $line = shift;
2278         my %opts = @_;
2279         my %res;
2280
2281         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2282         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2283
2284         $res{'mode'} = $1;
2285         $res{'type'} = $2;
2286         $res{'hash'} = $3;
2287         if ($opts{'-z'}) {
2288                 $res{'name'} = $4;
2289         } else {
2290                 $res{'name'} = unquote($4);
2291         }
2292
2293         return wantarray ? %res : \%res;
2294 }
2295
2296 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2297 sub parse_from_to_diffinfo {
2298         my ($diffinfo, $from, $to, @parents) = @_;
2299
2300         if ($diffinfo->{'nparents'}) {
2301                 # combined diff
2302                 $from->{'file'} = [];
2303                 $from->{'href'} = [];
2304                 fill_from_file_info($diffinfo, @parents)
2305                         unless exists $diffinfo->{'from_file'};
2306                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2307                         $from->{'file'}[$i] =
2308                                 defined $diffinfo->{'from_file'}[$i] ?
2309                                         $diffinfo->{'from_file'}[$i] :
2310                                         $diffinfo->{'to_file'};
2311                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2312                                 $from->{'href'}[$i] = href(action=>"blob",
2313                                                            hash_base=>$parents[$i],
2314                                                            hash=>$diffinfo->{'from_id'}[$i],
2315                                                            file_name=>$from->{'file'}[$i]);
2316                         } else {
2317                                 $from->{'href'}[$i] = undef;
2318                         }
2319                 }
2320         } else {
2321                 # ordinary (not combined) diff
2322                 $from->{'file'} = $diffinfo->{'from_file'};
2323                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2324                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2325                                                hash=>$diffinfo->{'from_id'},
2326                                                file_name=>$from->{'file'});
2327                 } else {
2328                         delete $from->{'href'};
2329                 }
2330         }
2331
2332         $to->{'file'} = $diffinfo->{'to_file'};
2333         if (!is_deleted($diffinfo)) { # file exists in result
2334                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2335                                      hash=>$diffinfo->{'to_id'},
2336                                      file_name=>$to->{'file'});
2337         } else {
2338                 delete $to->{'href'};
2339         }
2340 }
2341
2342 ## ......................................................................
2343 ## parse to array of hashes functions
2344
2345 sub git_get_heads_list {
2346         my $limit = shift;
2347         my @headslist;
2348
2349         open my $fd, '-|', git_cmd(), 'for-each-ref',
2350                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2351                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2352                 'refs/heads'
2353                 or return;
2354         while (my $line = <$fd>) {
2355                 my %ref_item;
2356
2357                 chomp $line;
2358                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2359                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2360                 my ($committer, $epoch, $tz) =
2361                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2362                 $ref_item{'fullname'}  = $name;
2363                 $name =~ s!^refs/heads/!!;
2364
2365                 $ref_item{'name'}  = $name;
2366                 $ref_item{'id'}    = $hash;
2367                 $ref_item{'title'} = $title || '(no commit message)';
2368                 $ref_item{'epoch'} = $epoch;
2369                 if ($epoch) {
2370                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2371                 } else {
2372                         $ref_item{'age'} = "unknown";
2373                 }
2374
2375                 push @headslist, \%ref_item;
2376         }
2377         close $fd;
2378
2379         return wantarray ? @headslist : \@headslist;
2380 }
2381
2382 sub git_get_tags_list {
2383         my $limit = shift;
2384         my @tagslist;
2385
2386         open my $fd, '-|', git_cmd(), 'for-each-ref',
2387                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2388                 '--format=%(objectname) %(objecttype) %(refname) '.
2389                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2390                 'refs/tags'
2391                 or return;
2392         while (my $line = <$fd>) {
2393                 my %ref_item;
2394
2395                 chomp $line;
2396                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2397                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2398                 my ($creator, $epoch, $tz) =
2399                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2400                 $ref_item{'fullname'} = $name;
2401                 $name =~ s!^refs/tags/!!;
2402
2403                 $ref_item{'type'} = $type;
2404                 $ref_item{'id'} = $id;
2405                 $ref_item{'name'} = $name;
2406                 if ($type eq "tag") {
2407                         $ref_item{'subject'} = $title;
2408                         $ref_item{'reftype'} = $reftype;
2409                         $ref_item{'refid'}   = $refid;
2410                 } else {
2411                         $ref_item{'reftype'} = $type;
2412                         $ref_item{'refid'}   = $id;
2413                 }
2414
2415                 if ($type eq "tag" || $type eq "commit") {
2416                         $ref_item{'epoch'} = $epoch;
2417                         if ($epoch) {
2418                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2419                         } else {
2420                                 $ref_item{'age'} = "unknown";
2421                         }
2422                 }
2423
2424                 push @tagslist, \%ref_item;
2425         }
2426         close $fd;
2427
2428         return wantarray ? @tagslist : \@tagslist;
2429 }
2430
2431 ## ----------------------------------------------------------------------
2432 ## filesystem-related functions
2433
2434 sub get_file_owner {
2435         my $path = shift;
2436
2437         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2438         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2439         if (!defined $gcos) {
2440                 return undef;
2441         }
2442         my $owner = $gcos;
2443         $owner =~ s/[,;].*$//;
2444         return to_utf8($owner);
2445 }
2446
2447 ## ......................................................................
2448 ## mimetype related functions
2449
2450 sub mimetype_guess_file {
2451         my $filename = shift;
2452         my $mimemap = shift;
2453         -r $mimemap or return undef;
2454
2455         my %mimemap;
2456         open(MIME, $mimemap) or return undef;
2457         while (<MIME>) {
2458                 next if m/^#/; # skip comments
2459                 my ($mime, $exts) = split(/\t+/);
2460                 if (defined $exts) {
2461                         my @exts = split(/\s+/, $exts);
2462                         foreach my $ext (@exts) {
2463                                 $mimemap{$ext} = $mime;
2464                         }
2465                 }
2466         }
2467         close(MIME);
2468
2469         $filename =~ /\.([^.]*)$/;
2470         return $mimemap{$1};
2471 }
2472
2473 sub mimetype_guess {
2474         my $filename = shift;
2475         my $mime;
2476         $filename =~ /\./ or return undef;
2477
2478         if ($mimetypes_file) {
2479                 my $file = $mimetypes_file;
2480                 if ($file !~ m!^/!) { # if it is relative path
2481                         # it is relative to project
2482                         $file = "$projectroot/$project/$file";
2483                 }
2484                 $mime = mimetype_guess_file($filename, $file);
2485         }
2486         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2487         return $mime;
2488 }
2489
2490 sub blob_mimetype {
2491         my $fd = shift;
2492         my $filename = shift;
2493
2494         if ($filename) {
2495                 my $mime = mimetype_guess($filename);
2496                 $mime and return $mime;
2497         }
2498
2499         # just in case
2500         return $default_blob_plain_mimetype unless $fd;
2501
2502         if (-T $fd) {
2503                 return 'text/plain';
2504         } elsif (! $filename) {
2505                 return 'application/octet-stream';
2506         } elsif ($filename =~ m/\.png$/i) {
2507                 return 'image/png';
2508         } elsif ($filename =~ m/\.gif$/i) {
2509                 return 'image/gif';
2510         } elsif ($filename =~ m/\.jpe?g$/i) {
2511                 return 'image/jpeg';
2512         } else {
2513                 return 'application/octet-stream';
2514         }
2515 }
2516
2517 sub blob_contenttype {
2518         my ($fd, $file_name, $type) = @_;
2519
2520         $type ||= blob_mimetype($fd, $file_name);
2521         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2522                 $type .= "; charset=$default_text_plain_charset";
2523         }
2524
2525         return $type;
2526 }
2527
2528 ## ======================================================================
2529 ## functions printing HTML: header, footer, error page
2530
2531 sub git_header_html {
2532         my $status = shift || "200 OK";
2533         my $expires = shift;
2534
2535         my $title = "$site_name";
2536         if (defined $project) {
2537                 $title .= " - " . to_utf8($project);
2538                 if (defined $action) {
2539                         $title .= "/$action";
2540                         if (defined $file_name) {
2541                                 $title .= " - " . esc_path($file_name);
2542                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2543                                         $title .= "/";
2544                                 }
2545                         }
2546                 }
2547         }
2548         my $content_type;
2549         # require explicit support from the UA if we are to send the page as
2550         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2551         # we have to do this because MSIE sometimes globs '*/*', pretending to
2552         # support xhtml+xml but choking when it gets what it asked for.
2553         if (defined $cgi->http('HTTP_ACCEPT') &&
2554             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2555             $cgi->Accept('application/xhtml+xml') != 0) {
2556                 $content_type = 'application/xhtml+xml';
2557         } else {
2558                 $content_type = 'text/html';
2559         }
2560         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2561                            -status=> $status, -expires => $expires);
2562         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2563         print <<EOF;
2564 <?xml version="1.0" encoding="utf-8"?>
2565 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2566 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2567 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2568 <!-- git core binaries version $git_version -->
2569 <head>
2570 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2571 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2572 <meta name="robots" content="index, nofollow"/>
2573 <title>$title</title>
2574 EOF
2575 # print out each stylesheet that exist
2576         if (defined $stylesheet) {
2577 #provides backwards capability for those people who define style sheet in a config file
2578                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2579         } else {
2580                 foreach my $stylesheet (@stylesheets) {
2581                         next unless $stylesheet;
2582                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2583                 }
2584         }
2585         if (defined $project) {
2586                 my %href_params = get_feed_info();
2587                 if (!exists $href_params{'-title'}) {
2588                         $href_params{'-title'} = 'log';
2589                 }
2590
2591                 foreach my $format qw(RSS Atom) {
2592                         my $type = lc($format);
2593                         my %link_attr = (
2594                                 '-rel' => 'alternate',
2595                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2596                                 '-type' => "application/$type+xml"
2597                         );
2598
2599                         $href_params{'action'} = $type;
2600                         $link_attr{'-href'} = href(%href_params);
2601                         print "<link ".
2602                               "rel=\"$link_attr{'-rel'}\" ".
2603                               "title=\"$link_attr{'-title'}\" ".
2604                               "href=\"$link_attr{'-href'}\" ".
2605                               "type=\"$link_attr{'-type'}\" ".
2606                               "/>\n";
2607
2608                         $href_params{'extra_options'} = '--no-merges';
2609                         $link_attr{'-href'} = href(%href_params);
2610                         $link_attr{'-title'} .= ' (no merges)';
2611                         print "<link ".
2612                               "rel=\"$link_attr{'-rel'}\" ".
2613                               "title=\"$link_attr{'-title'}\" ".
2614                               "href=\"$link_attr{'-href'}\" ".
2615                               "type=\"$link_attr{'-type'}\" ".
2616                               "/>\n";
2617                 }
2618
2619         } else {
2620                 printf('<link rel="alternate" title="%s projects list" '.
2621                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2622                        $site_name, href(project=>undef, action=>"project_index"));
2623                 printf('<link rel="alternate" title="%s projects feeds" '.
2624                        'href="%s" type="text/x-opml" />'."\n",
2625                        $site_name, href(project=>undef, action=>"opml"));
2626         }
2627         if (defined $favicon) {
2628                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2629         }
2630
2631         print "</head>\n" .
2632               "<body>\n";
2633
2634         if (-f $site_header) {
2635                 open (my $fd, $site_header);
2636                 print <$fd>;
2637                 close $fd;
2638         }
2639
2640         print "<div class=\"page_header\">\n" .
2641               $cgi->a({-href => esc_url($logo_url),
2642                        -title => $logo_label},
2643                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2644         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2645         if (defined $project) {
2646                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2647                 if (defined $action) {
2648                         print " / $action";
2649                 }
2650                 print "\n";
2651         }
2652         print "</div>\n";
2653
2654         my ($have_search) = gitweb_check_feature('search');
2655         if (defined $project && $have_search) {
2656                 if (!defined $searchtext) {
2657                         $searchtext = "";
2658                 }
2659                 my $search_hash;
2660                 if (defined $hash_base) {
2661                         $search_hash = $hash_base;
2662                 } elsif (defined $hash) {
2663                         $search_hash = $hash;
2664                 } else {
2665                         $search_hash = "HEAD";
2666                 }
2667                 my $action = $my_uri;
2668                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2669                 if ($use_pathinfo) {
2670                         $action .= "/".esc_url($project);
2671                 }
2672                 print $cgi->startform(-method => "get", -action => $action) .
2673                       "<div class=\"search\">\n" .
2674                       (!$use_pathinfo &&
2675                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2676                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2677                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2678                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2679                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2680                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2681                       " search:\n",
2682                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2683                       "<span title=\"Extended regular expression\">" .
2684                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2685                                      -checked => $search_use_regexp) .
2686                       "</span>" .
2687                       "</div>" .
2688                       $cgi->end_form() . "\n";
2689         }
2690 }
2691
2692 sub git_footer_html {
2693         my $feed_class = 'rss_logo';
2694
2695         print "<div class=\"page_footer\">\n";
2696         if (defined $project) {
2697                 my $descr = git_get_project_description($project);
2698                 if (defined $descr) {
2699                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2700                 }
2701
2702                 my %href_params = get_feed_info();
2703                 if (!%href_params) {
2704                         $feed_class .= ' generic';
2705                 }
2706                 $href_params{'-title'} ||= 'log';
2707
2708                 foreach my $format qw(RSS Atom) {
2709                         $href_params{'action'} = lc($format);
2710                         print $cgi->a({-href => href(%href_params),
2711                                       -title => "$href_params{'-title'} $format feed",
2712                                       -class => $feed_class}, $format)."\n";
2713                 }
2714
2715         } else {
2716                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2717                               -class => $feed_class}, "OPML") . " ";
2718                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2719                               -class => $feed_class}, "TXT") . "\n";
2720         }
2721         print "</div>\n"; # class="page_footer"
2722
2723         if (-f $site_footer) {
2724                 open (my $fd, $site_footer);
2725                 print <$fd>;
2726                 close $fd;
2727         }
2728
2729         print "</body>\n" .
2730               "</html>";
2731 }
2732
2733 # die_error(<http_status_code>, <error_message>)
2734 # Example: die_error(404, 'Hash not found')
2735 # By convention, use the following status codes (as defined in RFC 2616):
2736 # 400: Invalid or missing CGI parameters, or
2737 #      requested object exists but has wrong type.
2738 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2739 #      this server or project.
2740 # 404: Requested object/revision/project doesn't exist.
2741 # 500: The server isn't configured properly, or
2742 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2743 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2744 sub die_error {
2745         my $status = shift || 500;
2746         my $error = shift || "Internal server error";
2747
2748         my %http_responses = (400 => '400 Bad Request',
2749                               403 => '403 Forbidden',
2750                               404 => '404 Not Found',
2751                               500 => '500 Internal Server Error');
2752         git_header_html($http_responses{$status});
2753         print <<EOF;
2754 <div class="page_body">
2755 <br /><br />
2756 $status - $error
2757 <br />
2758 </div>
2759 EOF
2760         git_footer_html();
2761         exit;
2762 }
2763
2764 ## ----------------------------------------------------------------------
2765 ## functions printing or outputting HTML: navigation
2766
2767 sub git_print_page_nav {
2768         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2769         $extra = '' if !defined $extra; # pager or formats
2770
2771         my @navs = qw(summary log commit commitdiff tree);
2772         if ($suppress) {
2773                 @navs = grep { $_ ne $suppress } @navs;
2774         }
2775
2776         my %arg = map { $_ => {action=>$_} } @navs;
2777         if (defined $head) {
2778                 for (qw(commit commitdiff)) {
2779                         $arg{$_}{'hash'} = $head;
2780                 }
2781                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2782                         $arg{'log'}{'hash'} = $head;
2783                 }
2784         }
2785
2786         $arg{'log'}{'action'} = 'shortlog';
2787         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2788         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2789
2790         my @actions = gitweb_check_feature('actions');
2791         while (@actions) {
2792                 my ($label, $link, $pos) = (shift(@actions), shift(@actions), shift(@actions));
2793                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
2794                 # munch munch
2795                 $link =~ s#%n#$project#g;
2796                 $link =~ s#%f#$git_dir#g;
2797                 $treehead ? $link =~ s#%h#$treehead#g : $link =~ s#%h##g;
2798                 $treebase ? $link =~ s#%b#$treebase#g : $link =~ s#%b##g;
2799                 $arg{$label}{'_href'} = $link;
2800         }
2801
2802         print "<div class=\"page_nav\">\n" .
2803                 (join " | ",
2804                  map { $_ eq $current ?
2805                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
2806                  } @navs);
2807         print "<br/>\n$extra<br/>\n" .
2808               "</div>\n";
2809 }
2810
2811 sub format_paging_nav {
2812         my ($action, $hash, $head, $page, $has_next_link) = @_;
2813         my $paging_nav;
2814
2815
2816         if ($hash ne $head || $page) {
2817                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2818         } else {
2819                 $paging_nav .= "HEAD";
2820         }
2821
2822         if ($page > 0) {
2823                 $paging_nav .= " &sdot; " .
2824                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2825                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2826         } else {
2827                 $paging_nav .= " &sdot; prev";
2828         }
2829
2830         if ($has_next_link) {
2831                 $paging_nav .= " &sdot; " .
2832                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2833                                  -accesskey => "n", -title => "Alt-n"}, "next");
2834         } else {
2835                 $paging_nav .= " &sdot; next";
2836         }
2837
2838         return $paging_nav;
2839 }
2840
2841 sub format_log_nav {
2842         my ($action, $hash, $head, $page, $has_next_link) = @_;
2843         my $paging_nav;
2844
2845         if ($action eq 'shortlog') {
2846                 $paging_nav .= 'shortlog';
2847         } else {
2848                 $paging_nav .= $cgi->a({-href => href(action=>'shortlog', -replay=>1)}, 'shortlog');
2849         }
2850         $paging_nav .= ' | ';
2851         if ($action eq 'log') {
2852                 $paging_nav .= 'fulllog';
2853         } else {
2854                 $paging_nav .= $cgi->a({-href => href(action=>'log', -replay=>1)}, 'fulllog');
2855         }
2856
2857         $paging_nav .= " | " . format_paging_nav($action, $hash, $head, $page, $has_next_link);
2858         return $paging_nav;
2859 }
2860
2861 ## ......................................................................
2862 ## functions printing or outputting HTML: div
2863
2864 sub git_print_header_div {
2865         my ($action, $title, $hash, $hash_base) = @_;
2866         my %args = ();
2867
2868         $args{'action'} = $action;
2869         $args{'hash'} = $hash if $hash;
2870         $args{'hash_base'} = $hash_base if $hash_base;
2871
2872         print "<div class=\"header\">\n" .
2873               $cgi->a({-href => href(%args), -class => "title"},
2874               $title ? $title : $action) .
2875               "\n</div>\n";
2876 }
2877
2878 #sub git_print_authorship (\%) {
2879 sub git_print_authorship {
2880         my $co = shift;
2881
2882         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2883         print "<div class=\"author_date\">" .
2884               esc_html($co->{'author_name'}) .
2885               " [$ad{'rfc2822'}";
2886         if ($ad{'hour_local'} < 6) {
2887                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2888                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2889         } else {
2890                 printf(" (%02d:%02d %s)",
2891                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2892         }
2893         print "]</div>\n";
2894 }
2895
2896 sub git_print_page_path {
2897         my $name = shift;
2898         my $type = shift;
2899         my $hb = shift;
2900
2901
2902         print "<div class=\"page_path\">";
2903         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2904                       -title => 'tree root'}, to_utf8("[$project]"));
2905         print " / ";
2906         if (defined $name) {
2907                 my @dirname = split '/', $name;
2908                 my $basename = pop @dirname;
2909                 my $fullname = '';
2910
2911                 foreach my $dir (@dirname) {
2912                         $fullname .= ($fullname ? '/' : '') . $dir;
2913                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2914                                                      hash_base=>$hb),
2915                                       -title => $fullname}, esc_path($dir));
2916                         print " / ";
2917                 }
2918                 if (defined $type && $type eq 'blob') {
2919                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2920                                                      hash_base=>$hb),
2921                                       -title => $name}, esc_path($basename));
2922                 } elsif (defined $type && $type eq 'tree') {
2923                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2924                                                      hash_base=>$hb),
2925                                       -title => $name}, esc_path($basename));
2926                         print " / ";
2927                 } else {
2928                         print esc_path($basename);
2929                 }
2930         }
2931         print "<br/></div>\n";
2932 }
2933
2934 # sub git_print_log (\@;%) {
2935 sub git_print_log ($;%) {
2936         my $log = shift;
2937         my %opts = @_;
2938
2939         if ($opts{'-remove_title'}) {
2940                 # remove title, i.e. first line of log
2941                 shift @$log;
2942         }
2943         # remove leading empty lines
2944         while (defined $log->[0] && $log->[0] eq "") {
2945                 shift @$log;
2946         }
2947
2948         # print log
2949         my $signoff = 0;
2950         my $empty = 0;
2951         foreach my $line (@$log) {
2952                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2953                         $signoff = 1;
2954                         $empty = 0;
2955                         if (! $opts{'-remove_signoff'}) {
2956                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2957                                 next;
2958                         } else {
2959                                 # remove signoff lines
2960                                 next;
2961                         }
2962                 } else {
2963                         $signoff = 0;
2964                 }
2965
2966                 # print only one empty line
2967                 # do not print empty line after signoff
2968                 if ($line eq "") {
2969                         next if ($empty || $signoff);
2970                         $empty = 1;
2971                 } else {
2972                         $empty = 0;
2973                 }
2974
2975                 print format_log_line_html($line) . "<br/>\n";
2976         }
2977
2978         if ($opts{'-final_empty_line'}) {
2979                 # end with single empty line
2980                 print "<br/>\n" unless $empty;
2981         }
2982 }
2983
2984 # return link target (what link points to)
2985 sub git_get_link_target {
2986         my $hash = shift;
2987         my $link_target;
2988
2989         # read link
2990         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2991                 or return;
2992         {
2993                 local $/;
2994                 $link_target = <$fd>;
2995         }
2996         close $fd
2997                 or return;
2998
2999         return $link_target;
3000 }
3001
3002 # given link target, and the directory (basedir) the link is in,
3003 # return target of link relative to top directory (top tree);
3004 # return undef if it is not possible (including absolute links).
3005 sub normalize_link_target {
3006         my ($link_target, $basedir, $hash_base) = @_;
3007
3008         # we can normalize symlink target only if $hash_base is provided
3009         return unless $hash_base;
3010
3011         # absolute symlinks (beginning with '/') cannot be normalized
3012         return if (substr($link_target, 0, 1) eq '/');
3013
3014         # normalize link target to path from top (root) tree (dir)
3015         my $path;
3016         if ($basedir) {
3017                 $path = $basedir . '/' . $link_target;
3018         } else {
3019                 # we are in top (root) tree (dir)
3020                 $path = $link_target;
3021         }
3022
3023         # remove //, /./, and /../
3024         my @path_parts;
3025         foreach my $part (split('/', $path)) {
3026                 # discard '.' and ''
3027                 next if (!$part || $part eq '.');
3028                 # handle '..'
3029                 if ($part eq '..') {
3030                         if (@path_parts) {
3031                                 pop @path_parts;
3032                         } else {
3033                                 # link leads outside repository (outside top dir)
3034                                 return;
3035                         }
3036                 } else {
3037                         push @path_parts, $part;
3038                 }
3039         }
3040         $path = join('/', @path_parts);
3041
3042         return $path;
3043 }
3044
3045 # print tree entry (row of git_tree), but without encompassing <tr> element
3046 sub git_print_tree_entry {
3047         my ($t, $basedir, $hash_base, $have_blame) = @_;
3048
3049         my %base_key = ();
3050         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3051
3052         # The format of a table row is: mode list link.  Where mode is
3053         # the mode of the entry, list is the name of the entry, an href,
3054         # and link is the action links of the entry.
3055
3056         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3057         if ($t->{'type'} eq "blob") {
3058                 print "<td class=\"list\">" .
3059                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3060                                                file_name=>"$basedir$t->{'name'}", %base_key),
3061                                 -class => "list"}, esc_path($t->{'name'}));
3062                 if (S_ISLNK(oct $t->{'mode'})) {
3063                         my $link_target = git_get_link_target($t->{'hash'});
3064                         if ($link_target) {
3065                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3066                                 if (defined $norm_target) {
3067                                         print " -> " .
3068                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3069                                                                      file_name=>$norm_target),
3070                                                        -title => $norm_target}, esc_path($link_target));
3071                                 } else {
3072                                         print " -> " . esc_path($link_target);
3073                                 }
3074                         }
3075                 }
3076                 print "</td>\n";
3077                 print "<td class=\"link\">";
3078                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3079                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3080                               "blob");
3081                 if ($have_blame) {
3082                         print " | " .
3083                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3084                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3085                                       "blame");
3086                 }
3087                 if (defined $hash_base) {
3088                         print " | " .
3089                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3090                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3091                                       "history");
3092                 }
3093                 print " | " .
3094                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3095                                                file_name=>"$basedir$t->{'name'}")},
3096                                 "raw");
3097                 print "</td>\n";
3098
3099         } elsif ($t->{'type'} eq "tree") {
3100                 print "<td class=\"list\">";
3101                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3102                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3103                               esc_path($t->{'name'}));
3104                 print "</td>\n";
3105                 print "<td class=\"link\">";
3106                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3107                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3108                               "tree");
3109                 if (defined $hash_base) {
3110                         print " | " .
3111                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3112                                                      file_name=>"$basedir$t->{'name'}")},
3113                                       "history");
3114                 }
3115                 print "</td>\n";
3116         } else {
3117                 # unknown object: we can only present history for it
3118                 # (this includes 'commit' object, i.e. submodule support)
3119                 print "<td class=\"list\">" .
3120                       esc_path($t->{'name'}) .
3121                       "</td>\n";
3122                 print "<td class=\"link\">";
3123                 if (defined $hash_base) {
3124                         print $cgi->a({-href => href(action=>"history",
3125                                                      hash_base=>$hash_base,
3126                                                      file_name=>"$basedir$t->{'name'}")},
3127                                       "history");
3128                 }
3129                 print "</td>\n";
3130         }
3131 }
3132
3133 ## ......................................................................
3134 ## functions printing large fragments of HTML
3135
3136 # get pre-image filenames for merge (combined) diff
3137 sub fill_from_file_info {
3138         my ($diff, @parents) = @_;
3139
3140         $diff->{'from_file'} = [ ];
3141         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3142         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3143                 if ($diff->{'status'}[$i] eq 'R' ||
3144                     $diff->{'status'}[$i] eq 'C') {
3145                         $diff->{'from_file'}[$i] =
3146                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3147                 }
3148         }
3149
3150         return $diff;
3151 }
3152
3153 # is current raw difftree line of file deletion
3154 sub is_deleted {
3155         my $diffinfo = shift;
3156
3157         return $diffinfo->{'to_id'} eq ('0' x 40);
3158 }
3159
3160 # does patch correspond to [previous] difftree raw line
3161 # $diffinfo  - hashref of parsed raw diff format
3162 # $patchinfo - hashref of parsed patch diff format
3163 #              (the same keys as in $diffinfo)
3164 sub is_patch_split {
3165         my ($diffinfo, $patchinfo) = @_;
3166
3167         return defined $diffinfo && defined $patchinfo
3168                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3169 }
3170
3171
3172 sub git_difftree_body {
3173         my ($difftree, $hash, @parents) = @_;
3174         my ($parent) = $parents[0];
3175         my ($have_blame) = gitweb_check_feature('blame');
3176         print "<div class=\"list_head\">\n";
3177         if ($#{$difftree} > 10) {
3178                 print(($#{$difftree} + 1) . " files changed:\n");
3179         }
3180         print "</div>\n";
3181
3182         print "<table class=\"" .
3183               (@parents > 1 ? "combined " : "") .
3184               "diff_tree\">\n";
3185
3186         # header only for combined diff in 'commitdiff' view
3187         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3188         if ($has_header) {
3189                 # table header
3190                 print "<thead><tr>\n" .
3191                        "<th></th><th></th>\n"; # filename, patchN link
3192                 for (my $i = 0; $i < @parents; $i++) {
3193                         my $par = $parents[$i];
3194                         print "<th>" .
3195                               $cgi->a({-href => href(action=>"commitdiff",
3196                                                      hash=>$hash, hash_parent=>$par),
3197                                        -title => 'commitdiff to parent number ' .
3198                                                   ($i+1) . ': ' . substr($par,0,7)},
3199                                       $i+1) .
3200                               "&nbsp;</th>\n";
3201                 }
3202                 print "</tr></thead>\n<tbody>\n";
3203         }
3204
3205         my $alternate = 1;
3206         my $patchno = 0;
3207         foreach my $line (@{$difftree}) {
3208                 my $diff = parsed_difftree_line($line);
3209
3210                 if ($alternate) {
3211                         print "<tr class=\"dark\">\n";
3212                 } else {
3213                         print "<tr class=\"light\">\n";
3214                 }
3215                 $alternate ^= 1;
3216
3217                 if (exists $diff->{'nparents'}) { # combined diff
3218
3219                         fill_from_file_info($diff, @parents)
3220                                 unless exists $diff->{'from_file'};
3221
3222                         if (!is_deleted($diff)) {
3223                                 # file exists in the result (child) commit
3224                                 print "<td>" .
3225                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3226                                                              file_name=>$diff->{'to_file'},
3227                                                              hash_base=>$hash),
3228                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3229                                       "</td>\n";
3230                         } else {
3231                                 print "<td>" .
3232                                       esc_path($diff->{'to_file'}) .
3233                                       "</td>\n";
3234                         }
3235
3236                         if ($action eq 'commitdiff') {
3237                                 # link to patch
3238                                 $patchno++;
3239                                 print "<td class=\"link\">" .
3240                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3241                                       " | " .
3242                                       "</td>\n";
3243                         }
3244
3245                         my $has_history = 0;
3246                         my $not_deleted = 0;
3247                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3248                                 my $hash_parent = $parents[$i];
3249                                 my $from_hash = $diff->{'from_id'}[$i];
3250                                 my $from_path = $diff->{'from_file'}[$i];
3251                                 my $status = $diff->{'status'}[$i];
3252
3253                                 $has_history ||= ($status ne 'A');
3254                                 $not_deleted ||= ($status ne 'D');
3255
3256                                 if ($status eq 'A') {
3257                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3258                                 } elsif ($status eq 'D') {
3259                                         print "<td class=\"link\">" .
3260                                               $cgi->a({-href => href(action=>"blob",
3261                                                                      hash_base=>$hash,
3262                                                                      hash=>$from_hash,
3263                                                                      file_name=>$from_path)},
3264                                                       "blob" . ($i+1)) .
3265                                               " | </td>\n";
3266                                 } else {
3267                                         if ($diff->{'to_id'} eq $from_hash) {
3268                                                 print "<td class=\"link nochange\">";
3269                                         } else {
3270                                                 print "<td class=\"link\">";
3271                                         }
3272                                         print $cgi->a({-href => href(action=>"blobdiff",
3273                                                                      hash=>$diff->{'to_id'},
3274                                                                      hash_parent=>$from_hash,
3275                                                                      hash_base=>$hash,
3276                                                                      hash_parent_base=>$hash_parent,
3277                                                                      file_name=>$diff->{'to_file'},
3278                                                                      file_parent=>$from_path)},
3279                                                       "diff" . ($i+1)) .
3280                                               " | </td>\n";
3281                                 }
3282                         }
3283
3284                         print "<td class=\"link\">";
3285                         if ($not_deleted) {
3286                                 print $cgi->a({-href => href(action=>"blob",
3287                                                              hash=>$diff->{'to_id'},
3288                                                              file_name=>$diff->{'to_file'},
3289                                                              hash_base=>$hash)},
3290                                               "blob");
3291                                 print " | " if ($has_history);
3292                         }
3293                         if ($has_history) {
3294                                 print $cgi->a({-href => href(action=>"history",
3295                                                              file_name=>$diff->{'to_file'},
3296                                                              hash_base=>$hash)},
3297                                               "history");
3298                         }
3299                         print "</td>\n";
3300
3301                         print "</tr>\n";
3302                         next; # instead of 'else' clause, to avoid extra indent
3303                 }
3304                 # else ordinary diff
3305
3306                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3307                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3308                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3309                         $to_mode_oct = oct $diff->{'to_mode'};
3310                         if (S_ISREG($to_mode_oct)) { # only for regular file
3311                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3312                         }
3313                         $to_file_type = file_type($diff->{'to_mode'});
3314                 }
3315                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3316                         $from_mode_oct = oct $diff->{'from_mode'};
3317                         if (S_ISREG($to_mode_oct)) { # only for regular file
3318                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3319                         }
3320                         $from_file_type = file_type($diff->{'from_mode'});
3321                 }
3322
3323                 if ($diff->{'status'} eq "A") { # created
3324                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3325                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3326                         $mode_chng   .= "]</span>";
3327                         print "<td>";
3328                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3329                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3330                                       -class => "list"}, esc_path($diff->{'file'}));
3331                         print "</td>\n";
3332                         print "<td>$mode_chng</td>\n";
3333                         print "<td class=\"link\">";
3334                         if ($action eq 'commitdiff') {
3335                                 # link to patch
3336                                 $patchno++;
3337                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3338                                 print " | ";
3339                         }
3340                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3341                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3342                                       "blob");
3343                         print "</td>\n";
3344
3345                 } elsif ($diff->{'status'} eq "D") { # deleted
3346                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3347                         print "<td>";
3348                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3349                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3350                                        -class => "list"}, esc_path($diff->{'file'}));
3351                         print "</td>\n";
3352                         print "<td>$mode_chng</td>\n";
3353                         print "<td class=\"link\">";
3354                         if ($action eq 'commitdiff') {
3355                                 # link to patch
3356                                 $patchno++;
3357                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3358                                 print " | ";
3359                         }
3360                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3361                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3362                                       "blob") . " | ";
3363                         if ($have_blame) {
3364                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3365                                                              file_name=>$diff->{'file'})},
3366                                               "blame") . " | ";
3367                         }
3368                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3369                                                      file_name=>$diff->{'file'})},
3370                                       "history");
3371                         print "</td>\n";
3372
3373                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3374                         my $mode_chnge = "";
3375                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3376                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3377                                 if ($from_file_type ne $to_file_type) {
3378                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3379                                 }
3380                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3381                                         if ($from_mode_str && $to_mode_str) {
3382                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3383                                         } elsif ($to_mode_str) {
3384                                                 $mode_chnge .= " mode: $to_mode_str";
3385                                         }
3386                                 }
3387                                 $mode_chnge .= "]</span>\n";
3388                         }
3389                         print "<td>";
3390                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3391                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3392                                       -class => "list"}, esc_path($diff->{'file'}));
3393                         print "</td>\n";
3394                         print "<td>$mode_chnge</td>\n";
3395                         print "<td class=\"link\">";
3396                         if ($action eq 'commitdiff') {
3397                                 # link to patch
3398                                 $patchno++;
3399                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3400                                       " | ";
3401                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3402                                 # "commit" view and modified file (not onlu mode changed)
3403                                 print $cgi->a({-href => href(action=>"blobdiff",
3404                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3405                                                              hash_base=>$hash, hash_parent_base=>$parent,
3406                                                              file_name=>$diff->{'file'})},
3407                                               "diff") .
3408                                       " | ";
3409                         }
3410                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3411                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3412                                        "blob") . " | ";
3413                         if ($have_blame) {
3414                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3415                                                              file_name=>$diff->{'file'})},
3416                                               "blame") . " | ";
3417                         }
3418                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3419                                                      file_name=>$diff->{'file'})},
3420                                       "history");
3421                         print "</td>\n";
3422
3423                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3424                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3425                         my $nstatus = $status_name{$diff->{'status'}};
3426                         my $mode_chng = "";
3427                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3428                                 # mode also for directories, so we cannot use $to_mode_str
3429                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3430                         }
3431                         print "<td>" .
3432                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3433                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3434                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3435                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3436                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3437                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3438                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3439                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3440                               "<td class=\"link\">";
3441                         if ($action eq 'commitdiff') {
3442                                 # link to patch
3443                                 $patchno++;
3444                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3445                                       " | ";
3446                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3447                                 # "commit" view and modified file (not only pure rename or copy)
3448                                 print $cgi->a({-href => href(action=>"blobdiff",
3449                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3450                                                              hash_base=>$hash, hash_parent_base=>$parent,
3451                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3452                                               "diff") .
3453                                       " | ";
3454                         }
3455                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3456                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3457                                       "blob") . " | ";
3458                         if ($have_blame) {
3459                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3460                                                              file_name=>$diff->{'to_file'})},
3461                                               "blame") . " | ";
3462                         }
3463                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3464                                                     file_name=>$diff->{'to_file'})},
3465                                       "history");
3466                         print "</td>\n";
3467
3468                 } # we should not encounter Unmerged (U) or Unknown (X) status
3469                 print "</tr>\n";
3470         }
3471         print "</tbody>" if $has_header;
3472         print "</table>\n";
3473 }
3474
3475 sub git_patchset_body {
3476         my ($fd, $difftree, $hash, @hash_parents) = @_;
3477         my ($hash_parent) = $hash_parents[0];
3478
3479         my $is_combined = (@hash_parents > 1);
3480         my $patch_idx = 0;
3481         my $patch_number = 0;
3482         my $patch_line;
3483         my $diffinfo;
3484         my $to_name;
3485         my (%from, %to);
3486
3487         print "<div class=\"patchset\">\n";
3488
3489         # skip to first patch
3490         while ($patch_line = <$fd>) {
3491                 chomp $patch_line;
3492
3493                 last if ($patch_line =~ m/^diff /);
3494         }
3495
3496  PATCH:
3497         while ($patch_line) {
3498
3499                 # parse "git diff" header line
3500                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3501                         # $1 is from_name, which we do not use
3502                         $to_name = unquote($2);
3503                         $to_name =~ s!^b/!!;
3504                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3505                         # $1 is 'cc' or 'combined', which we do not use
3506                         $to_name = unquote($2);
3507                 } else {
3508                         $to_name = undef;
3509                 }
3510
3511                 # check if current patch belong to current raw line
3512                 # and parse raw git-diff line if needed
3513                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3514                         # this is continuation of a split patch
3515                         print "<div class=\"patch cont\">\n";
3516                 } else {
3517                         # advance raw git-diff output if needed
3518                         $patch_idx++ if defined $diffinfo;
3519
3520                         # read and prepare patch information
3521                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3522
3523                         # compact combined diff output can have some patches skipped
3524                         # find which patch (using pathname of result) we are at now;
3525                         if ($is_combined) {
3526                                 while ($to_name ne $diffinfo->{'to_file'}) {
3527                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3528                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3529                                               "</div>\n";  # class="patch"
3530
3531                                         $patch_idx++;
3532                                         $patch_number++;
3533
3534                                         last if $patch_idx > $#$difftree;
3535                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3536                                 }
3537                         }
3538
3539                         # modifies %from, %to hashes
3540                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3541
3542                         # this is first patch for raw difftree line with $patch_idx index
3543                         # we index @$difftree array from 0, but number patches from 1
3544                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3545                 }
3546
3547                 # git diff header
3548                 #assert($patch_line =~ m/^diff /) if DEBUG;
3549                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3550                 $patch_number++;
3551                 # print "git diff" header
3552                 print format_git_diff_header_line($patch_line, $diffinfo,
3553                                                   \%from, \%to);
3554
3555                 # print extended diff header
3556                 print "<div class=\"diff extended_header\">\n";
3557         EXTENDED_HEADER:
3558                 while ($patch_line = <$fd>) {
3559                         chomp $patch_line;
3560
3561                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3562
3563                         print format_extended_diff_header_line($patch_line, $diffinfo,
3564                                                                \%from, \%to);
3565                 }
3566                 print "</div>\n"; # class="diff extended_header"
3567
3568                 # from-file/to-file diff header
3569                 if (! $patch_line) {
3570                         print "</div>\n"; # class="patch"
3571                         last PATCH;
3572                 }
3573                 next PATCH if ($patch_line =~ m/^diff /);
3574                 #assert($patch_line =~ m/^---/) if DEBUG;
3575
3576                 my $last_patch_line = $patch_line;
3577                 $patch_line = <$fd>;
3578                 chomp $patch_line;
3579                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3580
3581                 print format_diff_from_to_header($last_patch_line, $patch_line,
3582                                                  $diffinfo, \%from, \%to,
3583                                                  @hash_parents);
3584
3585                 # the patch itself
3586         LINE:
3587                 while ($patch_line = <$fd>) {
3588                         chomp $patch_line;
3589
3590                         next PATCH if ($patch_line =~ m/^diff /);
3591
3592                         print format_diff_line($patch_line, \%from, \%to);
3593                 }
3594
3595         } continue {
3596                 print "</div>\n"; # class="patch"
3597         }
3598
3599         # for compact combined (--cc) format, with chunk and patch simpliciaction
3600         # patchset might be empty, but there might be unprocessed raw lines
3601         for (++$patch_idx if $patch_number > 0;
3602              $patch_idx < @$difftree;
3603              ++$patch_idx) {
3604                 # read and prepare patch information
3605                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3606
3607                 # generate anchor for "patch" links in difftree / whatchanged part
3608                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3609                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3610                       "</div>\n";  # class="patch"
3611
3612                 $patch_number++;
3613         }
3614
3615         if ($patch_number == 0) {
3616                 if (@hash_parents > 1) {
3617                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3618                 } else {
3619                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3620                 }
3621         }
3622
3623         print "</div>\n"; # class="patchset"
3624 }
3625
3626 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3627
3628 # fills project list info (age, description, owner, forks) for each
3629 # project in the list, removing invalid projects from returned list
3630 # NOTE: modifies $projlist, but does not remove entries from it
3631 sub fill_project_list_info {
3632         my ($projlist, $check_forks) = @_;
3633         my @projects;
3634
3635  PROJECT:
3636         foreach my $pr (@$projlist) {
3637                 my (@activity) = git_get_last_activity($pr->{'path'});
3638                 unless (@activity) {
3639                         next PROJECT;
3640                 }
3641                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3642                 if (!defined $pr->{'descr'}) {
3643                         my $descr = git_get_project_description($pr->{'path'}) || "";
3644                         $descr = to_utf8($descr);
3645                         $pr->{'descr_long'} = $descr;
3646                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3647                 }
3648                 if (!defined $pr->{'owner'}) {
3649                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3650                 }
3651                 if ($check_forks) {
3652                         my $pname = $pr->{'path'};
3653                         if (($pname =~ s/\.git$//) &&
3654                             ($pname !~ /\/$/) &&
3655                             (-d "$projectroot/$pname")) {
3656                                 $pr->{'forks'} = "-d $projectroot/$pname";
3657                         }       else {
3658                                 $pr->{'forks'} = 0;
3659                         }
3660                 }
3661                 push @projects, $pr;
3662         }
3663
3664         return @projects;
3665 }
3666
3667 # print 'sort by' <th> element, generating 'sort by $name' replay link
3668 # if that order is not selected
3669 sub print_sort_th {
3670         my ($name, $order, $header) = @_;
3671         $header ||= ucfirst($name);
3672
3673         if ($order eq $name) {
3674                 print "<th>$header</th>\n";
3675         } else {
3676                 print "<th>" .
3677                       $cgi->a({-href => href(-replay=>1, order=>$name),
3678                                -class => "header"}, $header) .
3679                       "</th>\n";
3680         }
3681 }
3682
3683 sub git_project_list_body {
3684         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3685
3686         my ($check_forks) = gitweb_check_feature('forks');
3687         my @projects = fill_project_list_info($projlist, $check_forks);
3688
3689         $order ||= $default_projects_order;
3690         $from = 0 unless defined $from;
3691         $to = $#projects if (!defined $to || $#projects < $to);
3692
3693         my %order_info = (
3694                 project => { key => 'path', type => 'str' },
3695                 descr => { key => 'descr_long', type => 'str' },
3696                 owner => { key => 'owner', type => 'str' },
3697                 age => { key => 'age', type => 'num' }
3698         );
3699         my $oi = $order_info{$order};
3700         if ($oi->{'type'} eq 'str') {
3701                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
3702         } else {
3703                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
3704         }
3705
3706         print "<table class=\"project_list\">\n";
3707         unless ($no_header) {
3708                 print "<tr>\n";
3709                 if ($check_forks) {
3710                         print "<th></th>\n";
3711                 }
3712                 print_sort_th('project', $order, 'Project');
3713                 print_sort_th('descr', $order, 'Description');
3714                 print_sort_th('owner', $order, 'Owner');
3715                 print_sort_th('age', $order, 'Last Change');
3716                 print "<th></th>\n" . # for links
3717                       "</tr>\n";
3718         }
3719         my $alternate = 1;
3720         for (my $i = $from; $i <= $to; $i++) {
3721                 my $pr = $projects[$i];
3722                 if ($alternate) {
3723                         print "<tr class=\"dark\">\n";
3724                 } else {
3725                         print "<tr class=\"light\">\n";
3726                 }
3727                 $alternate ^= 1;
3728                 if ($check_forks) {
3729                         print "<td>";
3730                         if ($pr->{'forks'}) {
3731                                 print "<!-- $pr->{'forks'} -->\n";
3732                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3733                         }
3734                         print "</td>\n";
3735                 }
3736                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3737                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3738                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3739                                         -class => "list", -title => $pr->{'descr_long'}},
3740                                         esc_html($pr->{'descr'})) . "</td>\n" .
3741                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3742                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3743                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3744                       "<td class=\"link\">" .
3745                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3746                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "log") . " | " .
3747                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3748                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3749                       "</td>\n" .
3750                       "</tr>\n";
3751         }
3752         if (defined $extra) {
3753                 print "<tr>\n";
3754                 if ($check_forks) {
3755                         print "<td></td>\n";
3756                 }
3757                 print "<td colspan=\"5\">$extra</td>\n" .
3758                       "</tr>\n";
3759         }
3760         print "</table>\n";
3761 }
3762
3763 sub git_shortlog_body {
3764         # uses global variable $project
3765         my ($commitlist, $from, $to, $refs, $extra) = @_;
3766
3767         $from = 0 unless defined $from;
3768         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3769
3770         print "<table class=\"shortlog\">\n";
3771         my $alternate = 1;
3772         for (my $i = $from; $i <= $to; $i++) {
3773                 my %co = %{$commitlist->[$i]};
3774                 my $commit = $co{'id'};
3775                 my $ref = format_ref_marker($refs, $commit);
3776                 if ($alternate) {
3777                         print "<tr class=\"dark\">\n";
3778                 } else {
3779                         print "<tr class=\"light\">\n";
3780                 }
3781                 $alternate ^= 1;
3782                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3783                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3784                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3785                       "<td><i>" . $author . "</i></td>\n" .
3786                       "<td>";
3787                 print format_subject_html($co{'title'}, $co{'title_short'},
3788                                           href(action=>"commit", hash=>$commit), $ref);
3789                 print "</td>\n" .
3790                       "<td class=\"link\">" .
3791                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3792                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3793                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3794                 my $snapshot_links = format_snapshot_links($commit);
3795                 if (defined $snapshot_links) {
3796                         print " | " . $snapshot_links;
3797                 }
3798                 print "</td>\n" .
3799                       "</tr>\n";
3800         }
3801         if (defined $extra) {
3802                 print "<tr>\n" .
3803                       "<td colspan=\"4\">$extra</td>\n" .
3804                       "</tr>\n";
3805         }
3806         print "</table>\n";
3807 }
3808
3809 sub git_history_body {
3810         # Warning: assumes constant type (blob or tree) during history
3811         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3812
3813         $from = 0 unless defined $from;
3814         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3815
3816         print "<table class=\"history\">\n";
3817         my $alternate = 1;
3818         for (my $i = $from; $i <= $to; $i++) {
3819                 my %co = %{$commitlist->[$i]};
3820                 if (!%co) {
3821                         next;
3822                 }
3823                 my $commit = $co{'id'};
3824
3825                 my $ref = format_ref_marker($refs, $commit);
3826
3827                 if ($alternate) {
3828                         print "<tr class=\"dark\">\n";
3829                 } else {
3830                         print "<tr class=\"light\">\n";
3831                 }
3832                 $alternate ^= 1;
3833         # shortlog uses      chop_str($co{'author_name'}, 10)
3834                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3835                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3836                       "<td><i>" . $author . "</i></td>\n" .
3837                       "<td>";
3838                 # originally git_history used chop_str($co{'title'}, 50)
3839                 print format_subject_html($co{'title'}, $co{'title_short'},
3840                                           href(action=>"commit", hash=>$commit), $ref);
3841                 print "</td>\n" .
3842                       "<td class=\"link\">" .
3843                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3844                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3845
3846                 if ($ftype eq 'blob') {
3847                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3848                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3849                         if (defined $blob_current && defined $blob_parent &&
3850                                         $blob_current ne $blob_parent) {
3851                                 print " | " .
3852                                         $cgi->a({-href => href(action=>"blobdiff",
3853                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3854                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3855                                                                file_name=>$file_name)},
3856                                                 "diff to current");
3857                         }
3858                 }
3859                 print "</td>\n" .
3860                       "</tr>\n";
3861         }
3862         if (defined $extra) {
3863                 print "<tr>\n" .
3864                       "<td colspan=\"4\">$extra</td>\n" .
3865                       "</tr>\n";
3866         }
3867         print "</table>\n";
3868 }
3869
3870 sub git_tags_body {
3871         # uses global variable $project
3872         my ($taglist, $from, $to, $extra) = @_;
3873         $from = 0 unless defined $from;
3874         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3875
3876         print "<table class=\"tags\">\n";
3877         my $alternate = 1;
3878         for (my $i = $from; $i <= $to; $i++) {
3879                 my $entry = $taglist->[$i];
3880                 my %tag = %$entry;
3881                 my $comment = $tag{'subject'};
3882                 my $comment_short;
3883                 if (defined $comment) {
3884                         $comment_short = chop_str($comment, 30, 5);
3885                 }
3886                 if ($alternate) {
3887                         print "<tr class=\"dark\">\n";
3888                 } else {
3889                         print "<tr class=\"light\">\n";
3890                 }
3891                 $alternate ^= 1;
3892                 if (defined $tag{'age'}) {
3893                         print "<td><i>$tag{'age'}</i></td>\n";
3894                 } else {
3895                         print "<td></td>\n";
3896                 }
3897                 print "<td>" .
3898                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3899                                -class => "list name"}, esc_html($tag{'name'})) .
3900                       "</td>\n" .
3901                       "<td>";
3902                 if (defined $comment) {
3903                         print format_subject_html($comment, $comment_short,
3904                                                   href(action=>"tag", hash=>$tag{'id'}));
3905                 }
3906                 print "</td>\n" .
3907                       "<td class=\"selflink\">";
3908                 if ($tag{'type'} eq "tag") {
3909                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3910                 } else {
3911                         print "&nbsp;";
3912                 }
3913                 print "</td>\n" .
3914                       "<td class=\"link\">" . " | " .
3915                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3916                 if ($tag{'reftype'} eq "commit") {
3917                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "log");
3918                 } elsif ($tag{'reftype'} eq "blob") {
3919                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3920                 }
3921                 print "</td>\n" .
3922                       "</tr>";
3923         }
3924         if (defined $extra) {
3925                 print "<tr>\n" .
3926                       "<td colspan=\"5\">$extra</td>\n" .
3927                       "</tr>\n";
3928         }
3929         print "</table>\n";
3930 }
3931
3932 sub git_heads_body {
3933         # uses global variable $project
3934         my ($headlist, $head, $from, $to, $extra) = @_;
3935         $from = 0 unless defined $from;
3936         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3937
3938         print "<table class=\"heads\">\n";
3939         my $alternate = 1;
3940         for (my $i = $from; $i <= $to; $i++) {
3941                 my $entry = $headlist->[$i];
3942                 my %ref = %$entry;
3943                 my $curr = $ref{'id'} eq $head;
3944                 if ($alternate) {
3945                         print "<tr class=\"dark\">\n";
3946                 } else {
3947                         print "<tr class=\"light\">\n";
3948                 }
3949                 $alternate ^= 1;
3950                 print "<td><i>$ref{'age'}</i></td>\n" .
3951                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3952                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3953                                -class => "list name"},esc_html($ref{'name'})) .
3954                       "</td>\n" .
3955                       "<td class=\"link\">" .
3956                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "log") . " | " .
3957                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3958                       "</td>\n" .
3959                       "</tr>";
3960         }
3961         if (defined $extra) {
3962                 print "<tr>\n" .
3963                       "<td colspan=\"3\">$extra</td>\n" .
3964                       "</tr>\n";
3965         }
3966         print "</table>\n";
3967 }
3968
3969 sub git_search_grep_body {
3970         my ($commitlist, $from, $to, $extra) = @_;
3971         $from = 0 unless defined $from;
3972         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3973
3974         print "<table class=\"commit_search\">\n";
3975         my $alternate = 1;
3976         for (my $i = $from; $i <= $to; $i++) {
3977                 my %co = %{$commitlist->[$i]};
3978                 if (!%co) {
3979                         next;
3980                 }
3981                 my $commit = $co{'id'};
3982                 if ($alternate) {
3983                         print "<tr class=\"dark\">\n";
3984                 } else {
3985                         print "<tr class=\"light\">\n";
3986                 }
3987                 $alternate ^= 1;
3988                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3989                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3990                       "<td><i>" . $author . "</i></td>\n" .
3991                       "<td>" .
3992                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3993                                -class => "list subject"},
3994                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3995                 my $comment = $co{'comment'};
3996                 foreach my $line (@$comment) {
3997                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3998                                 my ($lead, $match, $trail) = ($1, $2, $3);
3999                                 $match = chop_str($match, 70, 5, 'center');
4000                                 my $contextlen = int((80 - length($match))/2);
4001                                 $contextlen = 30 if ($contextlen > 30);
4002                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4003                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4004
4005                                 $lead  = esc_html($lead);
4006                                 $match = esc_html($match);
4007                                 $trail = esc_html($trail);
4008
4009                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4010                         }
4011                 }
4012                 print "</td>\n" .
4013                       "<td class=\"link\">" .
4014                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4015                       " | " .
4016                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4017                       " | " .
4018                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4019                 print "</td>\n" .
4020                       "</tr>\n";
4021         }
4022         if (defined $extra) {
4023                 print "<tr>\n" .
4024                       "<td colspan=\"3\">$extra</td>\n" .
4025                       "</tr>\n";
4026         }
4027         print "</table>\n";
4028 }
4029
4030 ## ======================================================================
4031 ## ======================================================================
4032 ## actions
4033
4034 sub git_project_list {
4035         my $order = $cgi->param('o');
4036         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4037                 die_error(400, "Unknown order parameter");
4038         }
4039
4040         my @list = git_get_projects_list();
4041         if (!@list) {
4042                 die_error(404, "No projects found");
4043         }
4044
4045         git_header_html();
4046         if (-f $home_text) {
4047                 print "<div class=\"index_include\">\n";
4048                 open (my $fd, $home_text);
4049                 print <$fd>;
4050                 close $fd;
4051                 print "</div>\n";
4052         }
4053         git_project_list_body(\@list, $order);
4054         git_footer_html();
4055 }
4056
4057 sub git_forks {
4058         my $order = $cgi->param('o');
4059         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4060                 die_error(400, "Unknown order parameter");
4061         }
4062
4063         my @list = git_get_projects_list($project);
4064         if (!@list) {
4065                 die_error(404, "No forks found");
4066         }
4067
4068         git_header_html();
4069         git_print_page_nav('','');
4070         git_print_header_div('summary', "$project forks");
4071         git_project_list_body(\@list, $order);
4072         git_footer_html();
4073 }
4074
4075 sub git_project_index {
4076         my @projects = git_get_projects_list($project);
4077
4078         print $cgi->header(
4079                 -type => 'text/plain',
4080                 -charset => 'utf-8',
4081                 -content_disposition => 'inline; filename="index.aux"');
4082
4083         foreach my $pr (@projects) {
4084                 if (!exists $pr->{'owner'}) {
4085                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4086                 }
4087
4088                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4089                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4090                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4091                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4092                 $path  =~ s/ /\+/g;
4093                 $owner =~ s/ /\+/g;
4094
4095                 print "$path $owner\n";
4096         }
4097 }
4098
4099 sub git_summary {
4100         my $descr = git_get_project_description($project) || "none";
4101         my %co = parse_commit("HEAD");
4102         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4103         my $head = $co{'id'};
4104
4105         my $owner = git_get_project_owner($project);
4106
4107         my $refs = git_get_references();
4108         # These get_*_list functions return one more to allow us to see if
4109         # there are more ...
4110         my @taglist  = git_get_tags_list(16);
4111         my @headlist = git_get_heads_list(16);
4112         my @forklist;
4113         my ($check_forks) = gitweb_check_feature('forks');
4114
4115         if ($check_forks) {
4116                 @forklist = git_get_projects_list($project);
4117         }
4118
4119         git_header_html();
4120         git_print_page_nav('summary','', $head);
4121
4122         print "<div class=\"title\">&nbsp;</div>\n";
4123         print "<table class=\"projects_list\">\n" .
4124               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4125               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4126         if (defined $cd{'rfc2822'}) {
4127                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4128         }
4129
4130         # use per project git URL list in $projectroot/$project/cloneurl
4131         # or make project git URL from git base URL and project name
4132         my $url_tag = "URL";
4133         my @url_list = git_get_project_url_list($project);
4134         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4135         foreach my $git_url (@url_list) {
4136                 next unless $git_url;
4137                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4138                 $url_tag = "";
4139         }
4140         print "</table>\n";
4141
4142         if (-s "$projectroot/$project/README.html") {
4143                 if (open my $fd, "$projectroot/$project/README.html") {
4144                         print "<div class=\"title\">readme</div>\n" .
4145                               "<div class=\"readme\">\n";
4146                         print $_ while (<$fd>);
4147                         print "\n</div>\n"; # class="readme"
4148                         close $fd;
4149                 }
4150         }
4151
4152         # we need to request one more than 16 (0..15) to check if
4153         # those 16 are all
4154         my @commitlist = $head ? parse_commits($head, 17) : ();
4155         if (@commitlist) {
4156                 git_print_header_div('shortlog');
4157                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4158                                   $#commitlist <=  15 ? undef :
4159                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4160         }
4161
4162         if (@taglist) {
4163                 git_print_header_div('tags');
4164                 git_tags_body(\@taglist, 0, 15,
4165                               $#taglist <=  15 ? undef :
4166                               $cgi->a({-href => href(action=>"tags")}, "..."));
4167         }
4168
4169         if (@headlist) {
4170                 git_print_header_div('heads');
4171                 git_heads_body(\@headlist, $head, 0, 15,
4172                                $#headlist <= 15 ? undef :
4173                                $cgi->a({-href => href(action=>"heads")}, "..."));
4174         }
4175
4176         if (@forklist) {
4177                 git_print_header_div('forks');
4178                 git_project_list_body(\@forklist, 'age', 0, 15,
4179                                       $#forklist <= 15 ? undef :
4180                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4181                                       'no_header');
4182         }
4183
4184         git_footer_html();
4185 }
4186
4187 sub git_tag {
4188         my $head = git_get_head_hash($project);
4189         git_header_html();
4190         git_print_page_nav('','', $head,undef,$head);
4191         my %tag = parse_tag($hash);
4192
4193         if (! %tag) {
4194                 die_error(404, "Unknown tag object");
4195         }
4196
4197         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4198         print "<div class=\"title_text\">\n" .
4199               "<table class=\"object_header\">\n" .
4200               "<tr>\n" .
4201               "<td>object</td>\n" .
4202               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4203                                $tag{'object'}) . "</td>\n" .
4204               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4205                                               $tag{'type'}) . "</td>\n" .
4206               "</tr>\n";
4207         if (defined($tag{'author'})) {
4208                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4209                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4210                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4211                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4212                         "</td></tr>\n";
4213         }
4214         print "</table>\n\n" .
4215               "</div>\n";
4216         print "<div class=\"page_body\">";
4217         my $comment = $tag{'comment'};
4218         foreach my $line (@$comment) {
4219                 chomp $line;
4220                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4221         }
4222         print "</div>\n";
4223         git_footer_html();
4224 }
4225
4226 sub git_blame {
4227         my $fd;
4228         my $ftype;
4229
4230         gitweb_check_feature('blame')
4231             or die_error(403, "Blame view not allowed");
4232
4233         die_error(400, "No file name given") unless $file_name;
4234         $hash_base ||= git_get_head_hash($project);
4235         die_error(404, "Couldn't find base commit") unless ($hash_base);
4236         my %co = parse_commit($hash_base)
4237                 or die_error(404, "Commit not found");
4238         if (!defined $hash) {
4239                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4240                         or die_error(404, "Error looking up file");
4241         }
4242         $ftype = git_get_type($hash);
4243         if ($ftype !~ "blob") {
4244                 die_error(400, "Object is not a blob");
4245         }
4246         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4247               $file_name, $hash_base)
4248                 or die_error(500, "Open git-blame failed");
4249         git_header_html();
4250         my $formats_nav =
4251                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4252                         "blob") .
4253                 " | " .
4254                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4255                         "history") .
4256                 " | " .
4257                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4258                         "HEAD");
4259         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4260         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4261         git_print_page_path($file_name, $ftype, $hash_base);
4262         my @rev_color = (qw(light2 dark2));
4263         my $num_colors = scalar(@rev_color);
4264         my $current_color = 0;
4265         my $last_rev;
4266         print <<HTML;
4267 <div class="page_body">
4268 <table class="blame">
4269 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4270 HTML
4271         my %metainfo = ();
4272         while (1) {
4273                 $_ = <$fd>;
4274                 last unless defined $_;
4275                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4276                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4277                 if (!exists $metainfo{$full_rev}) {
4278                         $metainfo{$full_rev} = {};
4279                 }
4280                 my $meta = $metainfo{$full_rev};
4281                 while (<$fd>) {
4282                         last if (s/^\t//);
4283                         if (/^(\S+) (.*)$/) {
4284                                 $meta->{$1} = $2;
4285                         }
4286                 }
4287                 my $data = $_;
4288                 chomp $data;
4289                 my $rev = substr($full_rev, 0, 8);
4290                 my $author = $meta->{'author'};
4291                 my %date = parse_date($meta->{'author-time'},
4292                                       $meta->{'author-tz'});
4293                 my $date = $date{'iso-tz'};
4294                 if ($group_size) {
4295                         $current_color = ++$current_color % $num_colors;
4296                 }
4297                 print "<tr class=\"$rev_color[$current_color]\">\n";
4298                 if ($group_size) {
4299                         print "<td class=\"sha1\"";
4300                         print " title=\"". esc_html($author) . ", $date\"";
4301                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4302                         print ">";
4303                         print $cgi->a({-href => href(action=>"commit",
4304                                                      hash=>$full_rev,
4305                                                      file_name=>$file_name)},
4306                                       esc_html($rev));
4307                         print "</td>\n";
4308                 }
4309                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4310                         or die_error(500, "Open git-rev-parse failed");
4311                 my $parent_commit = <$dd>;
4312                 close $dd;
4313                 chomp($parent_commit);
4314                 my $blamed = href(action => 'blame',
4315                                   file_name => $meta->{'filename'},
4316                                   hash_base => $parent_commit);
4317                 print "<td class=\"linenr\">";
4318                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4319                                 -id => "l$lineno",
4320                                 -class => "linenr" },
4321                               esc_html($lineno));
4322                 print "</td>";
4323                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4324                 print "</tr>\n";
4325         }
4326         print "</table>\n";
4327         print "</div>";
4328         close $fd
4329                 or print "Reading blob failed\n";
4330         git_footer_html();
4331 }
4332
4333 sub git_tags {
4334         my $head = git_get_head_hash($project);
4335         git_header_html();
4336         git_print_page_nav('','', $head,undef,$head);
4337         git_print_header_div('summary', $project);
4338
4339         my @tagslist = git_get_tags_list();
4340         if (@tagslist) {
4341                 git_tags_body(\@tagslist);
4342         }
4343         git_footer_html();
4344 }
4345
4346 sub git_heads {
4347         my $head = git_get_head_hash($project);
4348         git_header_html();
4349         git_print_page_nav('','', $head,undef,$head);
4350         git_print_header_div('summary', $project);
4351
4352         my @headslist = git_get_heads_list();
4353         if (@headslist) {
4354                 git_heads_body(\@headslist, $head);
4355         }
4356         git_footer_html();
4357 }
4358
4359 sub git_blob_plain {
4360         my $type = shift;
4361         my $expires;
4362
4363         if (!defined $hash) {
4364                 if (defined $file_name) {
4365                         my $base = $hash_base || git_get_head_hash($project);
4366                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4367                                 or die_error(404, "Cannot find file");
4368                 } else {
4369                         die_error(400, "No file name defined");
4370                 }
4371         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4372                 # blobs defined by non-textual hash id's can be cached
4373                 $expires = "+1d";
4374         }
4375
4376         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4377                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4378
4379         # content-type (can include charset)
4380         $type = blob_contenttype($fd, $file_name, $type);
4381
4382         # "save as" filename, even when no $file_name is given
4383         my $save_as = "$hash";
4384         if (defined $file_name) {
4385                 $save_as = $file_name;
4386         } elsif ($type =~ m/^text\//) {
4387                 $save_as .= '.txt';
4388         }
4389
4390         print $cgi->header(
4391                 -type => $type,
4392                 -expires => $expires,
4393                 -content_disposition => 'inline; filename="' . $save_as . '"');
4394         undef $/;
4395         binmode STDOUT, ':raw';
4396         print <$fd>;
4397         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4398         $/ = "\n";
4399         close $fd;
4400 }
4401
4402 sub git_blob {
4403         my $expires;
4404
4405         if (!defined $hash) {
4406                 if (defined $file_name) {
4407                         my $base = $hash_base || git_get_head_hash($project);
4408                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4409                                 or die_error(404, "Cannot find file");
4410                 } else {
4411                         die_error(400, "No file name defined");
4412                 }
4413         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4414                 # blobs defined by non-textual hash id's can be cached
4415                 $expires = "+1d";
4416         }
4417
4418         my ($have_blame) = gitweb_check_feature('blame');
4419         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4420                 or die_error(500, "Couldn't cat $file_name, $hash");
4421         my $mimetype = blob_mimetype($fd, $file_name);
4422         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4423                 close $fd;
4424                 return git_blob_plain($mimetype);
4425         }
4426         # we can have blame only for text/* mimetype
4427         $have_blame &&= ($mimetype =~ m!^text/!);
4428
4429         git_header_html(undef, $expires);
4430         my $formats_nav = '';
4431         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4432                 if (defined $file_name) {
4433                         if ($have_blame) {
4434                                 $formats_nav .=
4435                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4436                                                 "blame") .
4437                                         " | ";
4438                         }
4439                         $formats_nav .=
4440                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4441                                         "history") .
4442                                 " | " .
4443                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4444                                         "raw") .
4445                                 " | " .
4446                                 $cgi->a({-href => href(action=>"blob",
4447                                                        hash_base=>"HEAD", file_name=>$file_name)},
4448                                         "HEAD");
4449                 } else {
4450                         $formats_nav .=
4451                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4452                                         "raw");
4453                 }
4454                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4455                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4456         } else {
4457                 print "<div class=\"page_nav\">\n" .
4458                       "<br/><br/></div>\n" .
4459                       "<div class=\"title\">$hash</div>\n";
4460         }
4461         git_print_page_path($file_name, "blob", $hash_base);
4462         print "<div class=\"page_body\">\n";
4463         if ($mimetype =~ m!^image/!) {
4464                 print qq!<img type="$mimetype"!;
4465                 if ($file_name) {
4466                         print qq! alt="$file_name" title="$file_name"!;
4467                 }
4468                 print qq! src="! .
4469                       href(action=>"blob_plain", hash=>$hash,
4470                            hash_base=>$hash_base, file_name=>$file_name) .
4471                       qq!" />\n!;
4472         } else {
4473                 my $nr;
4474                 while (my $line = <$fd>) {
4475                         chomp $line;
4476                         $nr++;
4477                         $line = untabify($line);
4478                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4479                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4480                 }
4481         }
4482         close $fd
4483                 or print "Reading blob failed.\n";
4484         print "</div>";
4485         git_footer_html();
4486 }
4487
4488 sub git_tree {
4489         if (!defined $hash_base) {
4490                 $hash_base = "HEAD";
4491         }
4492         if (!defined $hash) {
4493                 if (defined $file_name) {
4494                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4495                 } else {
4496                         $hash = $hash_base;
4497                 }
4498         }
4499         die_error(404, "No such tree") unless defined($hash);
4500         $/ = "\0";
4501         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4502                 or die_error(500, "Open git-ls-tree failed");
4503         my @entries = map { chomp; $_ } <$fd>;
4504         close $fd or die_error(404, "Reading tree failed");
4505         $/ = "\n";
4506
4507         my $refs = git_get_references();
4508         my $ref = format_ref_marker($refs, $hash_base);
4509         git_header_html();
4510         my $basedir = '';
4511         my ($have_blame) = gitweb_check_feature('blame');
4512         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4513                 my @views_nav = ();
4514                 if (defined $file_name) {
4515                         push @views_nav,
4516                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4517                                         "history"),
4518                                 $cgi->a({-href => href(action=>"tree",
4519                                                        hash_base=>"HEAD", file_name=>$file_name)},
4520                                         "HEAD"),
4521                 }
4522                 my $snapshot_links = format_snapshot_links($hash);
4523                 if (defined $snapshot_links) {
4524                         # FIXME: Should be available when we have no hash base as well.
4525                         push @views_nav, $snapshot_links;
4526                 }
4527                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4528                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4529         } else {
4530                 undef $hash_base;
4531                 print "<div class=\"page_nav\">\n";
4532                 print "<br/><br/></div>\n";
4533                 print "<div class=\"title\">$hash</div>\n";
4534         }
4535         if (defined $file_name) {
4536                 $basedir = $file_name;
4537                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4538                         $basedir .= '/';
4539                 }
4540                 git_print_page_path($file_name, 'tree', $hash_base);
4541         }
4542         print "<div class=\"page_body\">\n";
4543         print "<table class=\"tree\">\n";
4544         my $alternate = 1;
4545         # '..' (top directory) link if possible
4546         if (defined $hash_base &&
4547             defined $file_name && $file_name =~ m![^/]+$!) {
4548                 if ($alternate) {
4549                         print "<tr class=\"dark\">\n";
4550                 } else {
4551                         print "<tr class=\"light\">\n";
4552                 }
4553                 $alternate ^= 1;
4554
4555                 my $up = $file_name;
4556                 $up =~ s!/?[^/]+$!!;
4557                 undef $up unless $up;
4558                 # based on git_print_tree_entry
4559                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4560                 print '<td class="list">';
4561                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4562                                              file_name=>$up)},
4563                               "..");
4564                 print "</td>\n";
4565                 print "<td class=\"link\"></td>\n";
4566
4567                 print "</tr>\n";
4568         }
4569         foreach my $line (@entries) {
4570                 my %t = parse_ls_tree_line($line, -z => 1);
4571
4572                 if ($alternate) {
4573                         print "<tr class=\"dark\">\n";
4574                 } else {
4575                         print "<tr class=\"light\">\n";
4576                 }
4577                 $alternate ^= 1;
4578
4579                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4580
4581                 print "</tr>\n";
4582         }
4583         print "</table>\n" .
4584               "</div>";
4585         git_footer_html();
4586 }
4587
4588 sub git_snapshot {
4589         my @supported_fmts = gitweb_check_feature('snapshot');
4590         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4591
4592         my $format = $cgi->param('sf');
4593         if (!@supported_fmts) {
4594                 die_error(403, "Snapshots not allowed");
4595         }
4596         # default to first supported snapshot format
4597         $format ||= $supported_fmts[0];
4598         if ($format !~ m/^[a-z0-9]+$/) {
4599                 die_error(400, "Invalid snapshot format parameter");
4600         } elsif (!exists($known_snapshot_formats{$format})) {
4601                 die_error(400, "Unknown snapshot format");
4602         } elsif (!grep($_ eq $format, @supported_fmts)) {
4603                 die_error(403, "Unsupported snapshot format");
4604         }
4605
4606         if (!defined $hash) {
4607                 $hash = git_get_head_hash($project);
4608         }
4609
4610         my $name = $project;
4611         $name =~ s,([^/])/*\.git$,$1,;
4612         $name = basename($name);
4613         my $filename = to_utf8($name);
4614         $name =~ s/\047/\047\\\047\047/g;
4615         my $cmd;
4616         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4617         $cmd = quote_command(
4618                 git_cmd(), 'archive',
4619                 "--format=$known_snapshot_formats{$format}{'format'}",
4620                 "--prefix=$name/", $hash);
4621         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4622                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4623         }
4624
4625         print $cgi->header(
4626                 -type => $known_snapshot_formats{$format}{'type'},
4627                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4628                 -status => '200 OK');
4629
4630         open my $fd, "-|", $cmd
4631                 or die_error(500, "Execute git-archive failed");
4632         binmode STDOUT, ':raw';
4633         print <$fd>;
4634         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4635         close $fd;
4636 }
4637
4638 sub git_log {
4639         my $head = git_get_head_hash($project);
4640         if (!defined $hash) {
4641                 $hash = $head;
4642         }
4643         if (!defined $page) {
4644                 $page = 0;
4645         }
4646         my $refs = git_get_references();
4647
4648         my @commitlist = parse_commits($hash, 101, (100 * $page));
4649
4650         my $paging_nav = format_log_nav('log', $hash, $head, $page, $#commitlist >= 100);
4651
4652         {
4653                 local $action = 'fulllog';
4654                 git_header_html();
4655         }
4656         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4657
4658         if (!@commitlist) {
4659                 my %co = parse_commit($hash);
4660
4661                 git_print_header_div('summary', $project);
4662                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4663         }
4664         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4665         for (my $i = 0; $i <= $to; $i++) {
4666                 my %co = %{$commitlist[$i]};
4667                 next if !%co;
4668                 my $commit = $co{'id'};
4669                 my $ref = format_ref_marker($refs, $commit);
4670                 my %ad = parse_date($co{'author_epoch'});
4671                 git_print_header_div('commit',
4672                                "<span class=\"age\">$co{'age_string'}</span>" .
4673                                esc_html($co{'title'}) . $ref,
4674                                $commit);
4675                 print "<div class=\"title_text\">\n" .
4676                       "<div class=\"log_link\">\n" .
4677                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4678                       " | " .
4679                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4680                       " | " .
4681                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4682                       "<br/>\n" .
4683                       "</div>\n" .
4684                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4685                       "</div>\n";
4686
4687                 print "<div class=\"log_body\">\n";
4688                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4689                 print "</div>\n";
4690         }
4691         if ($#commitlist >= 100) {
4692                 print "<div class=\"page_nav\">\n";
4693                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4694                                -accesskey => "n", -title => "Alt-n"}, "next");
4695                 print "</div>\n";
4696         }
4697         git_footer_html();
4698 }
4699
4700 sub git_commit {
4701         $hash ||= $hash_base || "HEAD";
4702         my %co = parse_commit($hash)
4703             or die_error(404, "Unknown commit object");
4704         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4705         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4706
4707         my $parent  = $co{'parent'};
4708         my $parents = $co{'parents'}; # listref
4709
4710         # we need to prepare $formats_nav before any parameter munging
4711         my $formats_nav;
4712         if (!defined $parent) {
4713                 # --root commitdiff
4714                 $formats_nav .= '(initial)';
4715         } elsif (@$parents == 1) {
4716                 # single parent commit
4717                 $formats_nav .=
4718                         '(parent: ' .
4719                         $cgi->a({-href => href(action=>"commit",
4720                                                hash=>$parent)},
4721                                 esc_html(substr($parent, 0, 7))) .
4722                         ')';
4723         } else {
4724                 # merge commit
4725                 $formats_nav .=
4726                         '(merge: ' .
4727                         join(' ', map {
4728                                 $cgi->a({-href => href(action=>"commit",
4729                                                        hash=>$_)},
4730                                         esc_html(substr($_, 0, 7)));
4731                         } @$parents ) .
4732                         ')';
4733         }
4734
4735         if (!defined $parent) {
4736                 $parent = "--root";
4737         }
4738         my @difftree;
4739         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4740                 @diff_opts,
4741                 (@$parents <= 1 ? $parent : '-c'),
4742                 $hash, "--"
4743                 or die_error(500, "Open git-diff-tree failed");
4744         @difftree = map { chomp; $_ } <$fd>;
4745         close $fd or die_error(404, "Reading git-diff-tree failed");
4746
4747         # non-textual hash id's can be cached
4748         my $expires;
4749         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4750                 $expires = "+1d";
4751         }
4752         my $refs = git_get_references();
4753         my $ref = format_ref_marker($refs, $co{'id'});
4754
4755         git_header_html(undef, $expires);
4756         git_print_page_nav('commit', '',
4757                            $hash, $co{'tree'}, $hash,
4758                            $formats_nav);
4759
4760         if (defined $co{'parent'}) {
4761                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4762         } else {
4763                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4764         }
4765         print "<div class=\"title_text\">\n" .
4766               "<table class=\"object_header\">\n";
4767         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4768               "<tr>" .
4769               "<td></td><td> $ad{'rfc2822'}";
4770         if ($ad{'hour_local'} < 6) {
4771                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4772                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4773         } else {
4774                 printf(" (%02d:%02d %s)",
4775                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4776         }
4777         print "</td>" .
4778               "</tr>\n";
4779         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4780         print "<tr><td></td><td> $cd{'rfc2822'}" .
4781               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4782               "</td></tr>\n";
4783         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4784         print "<tr>" .
4785               "<td>tree</td>" .
4786               "<td class=\"sha1\">" .
4787               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4788                        class => "list"}, $co{'tree'}) .
4789               "</td>" .
4790               "<td class=\"link\">" .
4791               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4792                       "tree");
4793         my $snapshot_links = format_snapshot_links($hash);
4794         if (defined $snapshot_links) {
4795                 print " | " . $snapshot_links;
4796         }
4797         print "</td>" .
4798               "</tr>\n";
4799
4800         foreach my $par (@$parents) {
4801                 print "<tr>" .
4802                       "<td>parent</td>" .
4803                       "<td class=\"sha1\">" .
4804                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4805                                class => "list"}, $par) .
4806                       "</td>" .
4807                       "<td class=\"link\">" .
4808                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4809                       " | " .
4810                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4811                       "</td>" .
4812                       "</tr>\n";
4813         }
4814         print "</table>".
4815               "</div>\n";
4816
4817         print "<div class=\"page_body\">\n";
4818         git_print_log($co{'comment'});
4819         print "</div>\n";
4820
4821         git_difftree_body(\@difftree, $hash, @$parents);
4822
4823         git_footer_html();
4824 }
4825
4826 sub git_object {
4827         # object is defined by:
4828         # - hash or hash_base alone
4829         # - hash_base and file_name
4830         my $type;
4831
4832         # - hash or hash_base alone
4833         if ($hash || ($hash_base && !defined $file_name)) {
4834                 my $object_id = $hash || $hash_base;
4835
4836                 open my $fd, "-|", quote_command(
4837                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4838                         or die_error(404, "Object does not exist");
4839                 $type = <$fd>;
4840                 chomp $type;
4841                 close $fd
4842                         or die_error(404, "Object does not exist");
4843
4844         # - hash_base and file_name
4845         } elsif ($hash_base && defined $file_name) {
4846                 $file_name =~ s,/+$,,;
4847
4848                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4849                         or die_error(404, "Base object does not exist");
4850
4851                 # here errors should not hapen
4852                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4853                         or die_error(500, "Open git-ls-tree failed");
4854                 my $line = <$fd>;
4855                 close $fd;
4856
4857                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4858                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4859                         die_error(404, "File or directory for given base does not exist");
4860                 }
4861                 $type = $2;
4862                 $hash = $3;
4863         } else {
4864                 die_error(400, "Not enough information to find object");
4865         }
4866
4867         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4868                                           hash=>$hash, hash_base=>$hash_base,
4869                                           file_name=>$file_name),
4870                              -status => '302 Found');
4871 }
4872
4873 sub git_blobdiff {
4874         my $format = shift || 'html';
4875
4876         my $fd;
4877         my @difftree;
4878         my %diffinfo;
4879         my $expires;
4880
4881         # preparing $fd and %diffinfo for git_patchset_body
4882         # new style URI
4883         if (defined $hash_base && defined $hash_parent_base) {
4884                 if (defined $file_name) {
4885                         # read raw output
4886                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4887                                 $hash_parent_base, $hash_base,
4888                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4889                                 or die_error(500, "Open git-diff-tree failed");
4890                         @difftree = map { chomp; $_ } <$fd>;
4891                         close $fd
4892                                 or die_error(404, "Reading git-diff-tree failed");
4893                         @difftree
4894                                 or die_error(404, "Blob diff not found");
4895
4896                 } elsif (defined $hash &&
4897                          $hash =~ /[0-9a-fA-F]{40}/) {
4898                         # try to find filename from $hash
4899
4900                         # read filtered raw output
4901                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4902                                 $hash_parent_base, $hash_base, "--"
4903                                 or die_error(500, "Open git-diff-tree failed");
4904                         @difftree =
4905                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4906                                 # $hash == to_id
4907                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4908                                 map { chomp; $_ } <$fd>;
4909                         close $fd
4910                                 or die_error(404, "Reading git-diff-tree failed");
4911                         @difftree
4912                                 or die_error(404, "Blob diff not found");
4913
4914                 } else {
4915                         die_error(400, "Missing one of the blob diff parameters");
4916                 }
4917
4918                 if (@difftree > 1) {
4919                         die_error(400, "Ambiguous blob diff specification");
4920                 }
4921
4922                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4923                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4924                 $file_name   ||= $diffinfo{'to_file'};
4925
4926                 $hash_parent ||= $diffinfo{'from_id'};
4927                 $hash        ||= $diffinfo{'to_id'};
4928
4929                 # non-textual hash id's can be cached
4930                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4931                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4932                         $expires = '+1d';
4933                 }
4934
4935                 # open patch output
4936                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4937                         '-p', ($format eq 'html' ? "--full-index" : ()),
4938                         $hash_parent_base, $hash_base,
4939                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4940                         or die_error(500, "Open git-diff-tree failed");
4941         }
4942
4943         # old/legacy style URI
4944         if (!%diffinfo && # if new style URI failed
4945             defined $hash && defined $hash_parent) {
4946                 # fake git-diff-tree raw output
4947                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4948                 $diffinfo{'from_id'} = $hash_parent;
4949                 $diffinfo{'to_id'}   = $hash;
4950                 if (defined $file_name) {
4951                         if (defined $file_parent) {
4952                                 $diffinfo{'status'} = '2';
4953                                 $diffinfo{'from_file'} = $file_parent;
4954                                 $diffinfo{'to_file'}   = $file_name;
4955                         } else { # assume not renamed
4956                                 $diffinfo{'status'} = '1';
4957                                 $diffinfo{'from_file'} = $file_name;
4958                                 $diffinfo{'to_file'}   = $file_name;
4959                         }
4960                 } else { # no filename given
4961                         $diffinfo{'status'} = '2';
4962                         $diffinfo{'from_file'} = $hash_parent;
4963                         $diffinfo{'to_file'}   = $hash;
4964                 }
4965
4966                 # non-textual hash id's can be cached
4967                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4968                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4969                         $expires = '+1d';
4970                 }
4971
4972                 # open patch output
4973                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4974                         '-p', ($format eq 'html' ? "--full-index" : ()),
4975                         $hash_parent, $hash, "--"
4976                         or die_error(500, "Open git-diff failed");
4977         } else  {
4978                 die_error(400, "Missing one of the blob diff parameters")
4979                         unless %diffinfo;
4980         }
4981
4982         # header
4983         if ($format eq 'html') {
4984                 my $formats_nav =
4985                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4986                                 "raw");
4987                 git_header_html(undef, $expires);
4988                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4989                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4990                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4991                 } else {
4992                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4993                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4994                 }
4995                 if (defined $file_name) {
4996                         git_print_page_path($file_name, "blob", $hash_base);
4997                 } else {
4998                         print "<div class=\"page_path\"></div>\n";
4999                 }
5000
5001         } elsif ($format eq 'plain') {
5002                 print $cgi->header(
5003                         -type => 'text/plain',
5004                         -charset => 'utf-8',
5005                         -expires => $expires,
5006                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5007
5008                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5009
5010         } else {
5011                 die_error(400, "Unknown blobdiff format");
5012         }
5013
5014         # patch
5015         if ($format eq 'html') {
5016                 print "<div class=\"page_body\">\n";
5017
5018                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5019                 close $fd;
5020
5021                 print "</div>\n"; # class="page_body"
5022                 git_footer_html();
5023
5024         } else {
5025                 while (my $line = <$fd>) {
5026                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5027                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5028
5029                         print $line;
5030
5031                         last if $line =~ m!^\+\+\+!;
5032                 }
5033                 local $/ = undef;
5034                 print <$fd>;
5035                 close $fd;
5036         }
5037 }
5038
5039 sub git_blobdiff_plain {
5040         git_blobdiff('plain');
5041 }
5042
5043 sub git_commitdiff {
5044         my $format = shift || 'html';
5045         $hash ||= $hash_base || "HEAD";
5046         my %co = parse_commit($hash)
5047             or die_error(404, "Unknown commit object");
5048
5049         # choose format for commitdiff for merge
5050         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5051                 $hash_parent = '--cc';
5052         }
5053         # we need to prepare $formats_nav before almost any parameter munging
5054         my $formats_nav;
5055         if ($format eq 'html') {
5056                 $formats_nav =
5057                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5058                                 "raw");
5059
5060                 if (defined $hash_parent &&
5061                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5062                         # commitdiff with two commits given
5063                         my $hash_parent_short = $hash_parent;
5064                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5065                                 $hash_parent_short = substr($hash_parent, 0, 7);
5066                         }
5067                         $formats_nav .=
5068                                 ' (from';
5069                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5070                                 if ($co{'parents'}[$i] eq $hash_parent) {
5071                                         $formats_nav .= ' parent ' . ($i+1);
5072                                         last;
5073                                 }
5074                         }
5075                         $formats_nav .= ': ' .
5076                                 $cgi->a({-href => href(action=>"commitdiff",
5077                                                        hash=>$hash_parent)},
5078                                         esc_html($hash_parent_short)) .
5079                                 ')';
5080                 } elsif (!$co{'parent'}) {
5081                         # --root commitdiff
5082                         $formats_nav .= ' (initial)';
5083                 } elsif (scalar @{$co{'parents'}} == 1) {
5084                         # single parent commit
5085                         $formats_nav .=
5086                                 ' (parent: ' .
5087                                 $cgi->a({-href => href(action=>"commitdiff",
5088                                                        hash=>$co{'parent'})},
5089                                         esc_html(substr($co{'parent'}, 0, 7))) .
5090                                 ')';
5091                 } else {
5092                         # merge commit
5093                         if ($hash_parent eq '--cc') {
5094                                 $formats_nav .= ' | ' .
5095                                         $cgi->a({-href => href(action=>"commitdiff",
5096                                                                hash=>$hash, hash_parent=>'-c')},
5097                                                 'combined');
5098                         } else { # $hash_parent eq '-c'
5099                                 $formats_nav .= ' | ' .
5100                                         $cgi->a({-href => href(action=>"commitdiff",
5101                                                                hash=>$hash, hash_parent=>'--cc')},
5102                                                 'compact');
5103                         }
5104                         $formats_nav .=
5105                                 ' (merge: ' .
5106                                 join(' ', map {
5107                                         $cgi->a({-href => href(action=>"commitdiff",
5108                                                                hash=>$_)},
5109                                                 esc_html(substr($_, 0, 7)));
5110                                 } @{$co{'parents'}} ) .
5111                                 ')';
5112                 }
5113         }
5114
5115         my $hash_parent_param = $hash_parent;
5116         if (!defined $hash_parent_param) {
5117                 # --cc for multiple parents, --root for parentless
5118                 $hash_parent_param =
5119                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5120         }
5121
5122         # read commitdiff
5123         my $fd;
5124         my @difftree;
5125         if ($format eq 'html') {
5126                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5127                         "--no-commit-id", "--patch-with-raw", "--full-index",
5128                         $hash_parent_param, $hash, "--"
5129                         or die_error(500, "Open git-diff-tree failed");
5130
5131                 while (my $line = <$fd>) {
5132                         chomp $line;
5133                         # empty line ends raw part of diff-tree output
5134                         last unless $line;
5135                         push @difftree, scalar parse_difftree_raw_line($line);
5136                 }
5137
5138         } elsif ($format eq 'plain') {
5139                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5140                         '-p', $hash_parent_param, $hash, "--"
5141                         or die_error(500, "Open git-diff-tree failed");
5142
5143         } else {
5144                 die_error(400, "Unknown commitdiff format");
5145         }
5146
5147         # non-textual hash id's can be cached
5148         my $expires;
5149         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5150                 $expires = "+1d";
5151         }
5152
5153         # write commit message
5154         if ($format eq 'html') {
5155                 my $refs = git_get_references();
5156                 my $ref = format_ref_marker($refs, $co{'id'});
5157
5158                 git_header_html(undef, $expires);
5159                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5160                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5161                 git_print_authorship(\%co);
5162                 print "<div class=\"page_body\">\n";
5163                 if (@{$co{'comment'}} > 1) {
5164                         print "<div class=\"log\">\n";
5165                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5166                         print "</div>\n"; # class="log"
5167                 }
5168
5169         } elsif ($format eq 'plain') {
5170                 my $refs = git_get_references("tags");
5171                 my $tagname = git_get_rev_name_tags($hash);
5172                 my $filename = basename($project) . "-$hash.patch";
5173
5174                 print $cgi->header(
5175                         -type => 'text/plain',
5176                         -charset => 'utf-8',
5177                         -expires => $expires,
5178                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5179                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5180                 print "From: " . to_utf8($co{'author'}) . "\n";
5181                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5182                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5183
5184                 print "X-Git-Tag: $tagname\n" if $tagname;
5185                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5186
5187                 foreach my $line (@{$co{'comment'}}) {
5188                         print to_utf8($line) . "\n";
5189                 }
5190                 print "---\n\n";
5191         }
5192
5193         # write patch
5194         if ($format eq 'html') {
5195                 my $use_parents = !defined $hash_parent ||
5196                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5197                 git_difftree_body(\@difftree, $hash,
5198                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5199                 print "<br/>\n";
5200
5201                 git_patchset_body($fd, \@difftree, $hash,
5202                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5203                 close $fd;
5204                 print "</div>\n"; # class="page_body"
5205                 git_footer_html();
5206
5207         } elsif ($format eq 'plain') {
5208                 local $/ = undef;
5209                 print <$fd>;
5210                 close $fd
5211                         or print "Reading git-diff-tree failed\n";
5212         }
5213 }
5214
5215 sub git_commitdiff_plain {
5216         git_commitdiff('plain');
5217 }
5218
5219 sub git_history {
5220         if (!defined $hash_base) {
5221                 $hash_base = git_get_head_hash($project);
5222         }
5223         if (!defined $page) {
5224                 $page = 0;
5225         }
5226         my $ftype;
5227         my %co = parse_commit($hash_base)
5228             or die_error(404, "Unknown commit object");
5229
5230         my $refs = git_get_references();
5231         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5232
5233         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5234                                        $file_name, "--full-history")
5235             or die_error(404, "No such file or directory on given branch");
5236
5237         if (!defined $hash && defined $file_name) {
5238                 # some commits could have deleted file in question,
5239                 # and not have it in tree, but one of them has to have it
5240                 for (my $i = 0; $i <= @commitlist; $i++) {
5241                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5242                         last if defined $hash;
5243                 }
5244         }
5245         if (defined $hash) {
5246                 $ftype = git_get_type($hash);
5247         }
5248         if (!defined $ftype) {
5249                 die_error(500, "Unknown type of object");
5250         }
5251
5252         my $paging_nav = '';
5253         if ($page > 0) {
5254                 $paging_nav .=
5255                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5256                                                file_name=>$file_name)},
5257                                 "first");
5258                 $paging_nav .= " &sdot; " .
5259                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5260                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5261         } else {
5262                 $paging_nav .= "first";
5263                 $paging_nav .= " &sdot; prev";
5264         }
5265         my $next_link = '';
5266         if ($#commitlist >= 100) {
5267                 $next_link =
5268                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5269                                  -accesskey => "n", -title => "Alt-n"}, "next");
5270                 $paging_nav .= " &sdot; $next_link";
5271         } else {
5272                 $paging_nav .= " &sdot; next";
5273         }
5274
5275         git_header_html();
5276         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5277         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5278         git_print_page_path($file_name, $ftype, $hash_base);
5279
5280         git_history_body(\@commitlist, 0, 99,
5281                          $refs, $hash_base, $ftype, $next_link);
5282
5283         git_footer_html();
5284 }
5285
5286 sub git_search {
5287         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5288         if (!defined $searchtext) {
5289                 die_error(400, "Text field is empty");
5290         }
5291         if (!defined $hash) {
5292                 $hash = git_get_head_hash($project);
5293         }
5294         my %co = parse_commit($hash);
5295         if (!%co) {
5296                 die_error(404, "Unknown commit object");
5297         }
5298         if (!defined $page) {
5299                 $page = 0;
5300         }
5301
5302         $searchtype ||= 'commit';
5303         if ($searchtype eq 'pickaxe') {
5304                 # pickaxe may take all resources of your box and run for several minutes
5305                 # with every query - so decide by yourself how public you make this feature
5306                 gitweb_check_feature('pickaxe')
5307                     or die_error(403, "Pickaxe is disabled");
5308         }
5309         if ($searchtype eq 'grep') {
5310                 gitweb_check_feature('grep')
5311                     or die_error(403, "Grep is disabled");
5312         }
5313
5314         git_header_html();
5315
5316         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5317                 my $greptype;
5318                 if ($searchtype eq 'commit') {
5319                         $greptype = "--grep=";
5320                 } elsif ($searchtype eq 'author') {
5321                         $greptype = "--author=";
5322                 } elsif ($searchtype eq 'committer') {
5323                         $greptype = "--committer=";
5324                 }
5325                 $greptype .= $searchtext;
5326                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5327                                                $greptype, '--regexp-ignore-case',
5328                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5329
5330                 my $paging_nav = '';
5331                 if ($page > 0) {
5332                         $paging_nav .=
5333                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5334                                                        searchtext=>$searchtext,
5335                                                        searchtype=>$searchtype)},
5336                                         "first");
5337                         $paging_nav .= " &sdot; " .
5338                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5339                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5340                 } else {
5341                         $paging_nav .= "first";
5342                         $paging_nav .= " &sdot; prev";
5343                 }
5344                 my $next_link = '';
5345                 if ($#commitlist >= 100) {
5346                         $next_link =
5347                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5348                                          -accesskey => "n", -title => "Alt-n"}, "next");
5349                         $paging_nav .= " &sdot; $next_link";
5350                 } else {
5351                         $paging_nav .= " &sdot; next";
5352                 }
5353
5354                 if ($#commitlist >= 100) {
5355                 }
5356
5357                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5358                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5359                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5360         }
5361
5362         if ($searchtype eq 'pickaxe') {
5363                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5364                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5365
5366                 print "<table class=\"pickaxe search\">\n";
5367                 my $alternate = 1;
5368                 $/ = "\n";
5369                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5370                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5371                         ($search_use_regexp ? '--pickaxe-regex' : ());
5372                 undef %co;
5373                 my @files;
5374                 while (my $line = <$fd>) {
5375                         chomp $line;
5376                         next unless $line;
5377
5378                         my %set = parse_difftree_raw_line($line);
5379                         if (defined $set{'commit'}) {
5380                                 # finish previous commit
5381                                 if (%co) {
5382                                         print "</td>\n" .
5383                                               "<td class=\"link\">" .
5384                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5385                                               " | " .
5386                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5387                                         print "</td>\n" .
5388                                               "</tr>\n";
5389                                 }
5390
5391                                 if ($alternate) {
5392                                         print "<tr class=\"dark\">\n";
5393                                 } else {
5394                                         print "<tr class=\"light\">\n";
5395                                 }
5396                                 $alternate ^= 1;
5397                                 %co = parse_commit($set{'commit'});
5398                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5399                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5400                                       "<td><i>$author</i></td>\n" .
5401                                       "<td>" .
5402                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5403                                               -class => "list subject"},
5404                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5405                         } elsif (defined $set{'to_id'}) {
5406                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5407
5408                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5409                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5410                                               -class => "list"},
5411                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5412                                       "<br/>\n";
5413                         }
5414                 }
5415                 close $fd;
5416
5417                 # finish last commit (warning: repetition!)
5418                 if (%co) {
5419                         print "</td>\n" .
5420                               "<td class=\"link\">" .
5421                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5422                               " | " .
5423                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5424                         print "</td>\n" .
5425                               "</tr>\n";
5426                 }
5427
5428                 print "</table>\n";
5429         }
5430
5431         if ($searchtype eq 'grep') {
5432                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5433                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5434
5435                 print "<table class=\"grep_search\">\n";
5436                 my $alternate = 1;
5437                 my $matches = 0;
5438                 $/ = "\n";
5439                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5440                         $search_use_regexp ? ('-E', '-i') : '-F',
5441                         $searchtext, $co{'tree'};
5442                 my $lastfile = '';
5443                 while (my $line = <$fd>) {
5444                         chomp $line;
5445                         my ($file, $lno, $ltext, $binary);
5446                         last if ($matches++ > 1000);
5447                         if ($line =~ /^Binary file (.+) matches$/) {
5448                                 $file = $1;
5449                                 $binary = 1;
5450                         } else {
5451                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5452                         }
5453                         if ($file ne $lastfile) {
5454                                 $lastfile and print "</td></tr>\n";
5455                                 if ($alternate++) {
5456                                         print "<tr class=\"dark\">\n";
5457                                 } else {
5458                                         print "<tr class=\"light\">\n";
5459                                 }
5460                                 print "<td class=\"list\">".
5461                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5462                                                                file_name=>"$file"),
5463                                                 -class => "list"}, esc_path($file));
5464                                 print "</td><td>\n";
5465                                 $lastfile = $file;
5466                         }
5467                         if ($binary) {
5468                                 print "<div class=\"binary\">Binary file</div>\n";
5469                         } else {
5470                                 $ltext = untabify($ltext);
5471                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5472                                         $ltext = esc_html($1, -nbsp=>1);
5473                                         $ltext .= '<span class="match">';
5474                                         $ltext .= esc_html($2, -nbsp=>1);
5475                                         $ltext .= '</span>';
5476                                         $ltext .= esc_html($3, -nbsp=>1);
5477                                 } else {
5478                                         $ltext = esc_html($ltext, -nbsp=>1);
5479                                 }
5480                                 print "<div class=\"pre\">" .
5481                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5482                                                                file_name=>"$file").'#l'.$lno,
5483                                                 -class => "linenr"}, sprintf('%4i', $lno))
5484                                         . ' ' .  $ltext . "</div>\n";
5485                         }
5486                 }
5487                 if ($lastfile) {
5488                         print "</td></tr>\n";
5489                         if ($matches > 1000) {
5490                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5491                         }
5492                 } else {
5493                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5494                 }
5495                 close $fd;
5496
5497                 print "</table>\n";
5498         }
5499         git_footer_html();
5500 }
5501
5502 sub git_search_help {
5503         git_header_html();
5504         git_print_page_nav('','', $hash,$hash,$hash);
5505         print <<EOT;
5506 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5507 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5508 the pattern entered is recognized as the POSIX extended
5509 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5510 insensitive).</p>
5511 <dl>
5512 <dt><b>commit</b></dt>
5513 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5514 EOT
5515         my ($have_grep) = gitweb_check_feature('grep');
5516         if ($have_grep) {
5517                 print <<EOT;
5518 <dt><b>grep</b></dt>
5519 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5520     a different one) are searched for the given pattern. On large trees, this search can take
5521 a while and put some strain on the server, so please use it with some consideration. Note that
5522 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5523 case-sensitive.</dd>
5524 EOT
5525         }
5526         print <<EOT;
5527 <dt><b>author</b></dt>
5528 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5529 <dt><b>committer</b></dt>
5530 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5531 EOT
5532         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5533         if ($have_pickaxe) {
5534                 print <<EOT;
5535 <dt><b>pickaxe</b></dt>
5536 <dd>All commits that caused the string to appear or disappear from any file (changes that
5537 added, removed or "modified" the string) will be listed. This search can take a while and
5538 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5539 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5540 EOT
5541         }
5542         print "</dl>\n";
5543         git_footer_html();
5544 }
5545
5546 sub git_shortlog {
5547         my $head = git_get_head_hash($project);
5548         if (!defined $hash) {
5549                 $hash = $head;
5550         }
5551         if (!defined $page) {
5552                 $page = 0;
5553         }
5554         my $refs = git_get_references();
5555
5556         my $commit_hash = $hash;
5557         if (defined $hash_parent) {
5558                 $commit_hash = "$hash_parent..$hash";
5559         }
5560         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5561
5562         my $paging_nav = format_log_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5563
5564         my $next_link = '';
5565         if ($#commitlist >= 100) {
5566                 $next_link =
5567                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5568                                  -accesskey => "n", -title => "Alt-n"}, "next");
5569         }
5570
5571         git_header_html();
5572         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5573         git_print_header_div('summary', $project);
5574
5575         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5576
5577         git_footer_html();
5578 }
5579
5580 ## ......................................................................
5581 ## feeds (RSS, Atom; OPML)
5582
5583 sub git_feed {
5584         my $format = shift || 'atom';
5585         my ($have_blame) = gitweb_check_feature('blame');
5586
5587         # Atom: http://www.atomenabled.org/developers/syndication/
5588         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5589         if ($format ne 'rss' && $format ne 'atom') {
5590                 die_error(400, "Unknown web feed format");
5591         }
5592
5593         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5594         my $head = $hash || 'HEAD';
5595         my @commitlist = parse_commits($head, 150, 0, $file_name);
5596
5597         my %latest_commit;
5598         my %latest_date;
5599         my $content_type = "application/$format+xml";
5600         if (defined $cgi->http('HTTP_ACCEPT') &&
5601                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5602                 # browser (feed reader) prefers text/xml
5603                 $content_type = 'text/xml';
5604         }
5605         if (defined($commitlist[0])) {
5606                 %latest_commit = %{$commitlist[0]};
5607                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5608                 print $cgi->header(
5609                         -type => $content_type,
5610                         -charset => 'utf-8',
5611                         -last_modified => $latest_date{'rfc2822'});
5612         } else {
5613                 print $cgi->header(
5614                         -type => $content_type,
5615                         -charset => 'utf-8');
5616         }
5617
5618         # Optimization: skip generating the body if client asks only
5619         # for Last-Modified date.
5620         return if ($cgi->request_method() eq 'HEAD');
5621
5622         # header variables
5623         my $title = "$site_name - $project/$action";
5624         my $feed_type = 'log';
5625         if (defined $hash) {
5626                 $title .= " - '$hash'";
5627                 $feed_type = 'branch log';
5628                 if (defined $file_name) {
5629                         $title .= " :: $file_name";
5630                         $feed_type = 'history';
5631                 }
5632         } elsif (defined $file_name) {
5633                 $title .= " - $file_name";
5634                 $feed_type = 'history';
5635         }
5636         $title .= " $feed_type";
5637         my $descr = git_get_project_description($project);
5638         if (defined $descr) {
5639                 $descr = esc_html($descr);
5640         } else {
5641                 $descr = "$project " .
5642                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5643                          " feed";
5644         }
5645         my $owner = git_get_project_owner($project);
5646         $owner = esc_html($owner);
5647
5648         #header
5649         my $alt_url;
5650         if (defined $file_name) {
5651                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5652         } elsif (defined $hash) {
5653                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5654         } else {
5655                 $alt_url = href(-full=>1, action=>"summary");
5656         }
5657         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5658         if ($format eq 'rss') {
5659                 print <<XML;
5660 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5661 <channel>
5662 XML
5663                 print "<title>$title</title>\n" .
5664                       "<link>$alt_url</link>\n" .
5665                       "<description>$descr</description>\n" .
5666                       "<language>en</language>\n";
5667         } elsif ($format eq 'atom') {
5668                 print <<XML;
5669 <feed xmlns="http://www.w3.org/2005/Atom">
5670 XML
5671                 print "<title>$title</title>\n" .
5672                       "<subtitle>$descr</subtitle>\n" .
5673                       '<link rel="alternate" type="text/html" href="' .
5674                       $alt_url . '" />' . "\n" .
5675                       '<link rel="self" type="' . $content_type . '" href="' .
5676                       $cgi->self_url() . '" />' . "\n" .
5677                       "<id>" . href(-full=>1) . "</id>\n" .
5678                       # use project owner for feed author
5679                       "<author><name>$owner</name></author>\n";
5680                 if (defined $favicon) {
5681                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5682                 }
5683                 if (defined $logo_url) {
5684                         # not twice as wide as tall: 72 x 27 pixels
5685                         print "<logo>" . esc_url($logo) . "</logo>\n";
5686                 }
5687                 if (! %latest_date) {
5688                         # dummy date to keep the feed valid until commits trickle in:
5689                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5690                 } else {
5691                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5692                 }
5693         }
5694
5695         # contents
5696         for (my $i = 0; $i <= $#commitlist; $i++) {
5697                 my %co = %{$commitlist[$i]};
5698                 my $commit = $co{'id'};
5699                 # we read 150, we always show 30 and the ones more recent than 48 hours
5700                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5701                         last;
5702                 }
5703                 my %cd = parse_date($co{'author_epoch'});
5704
5705                 # get list of changed files
5706                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5707                         $co{'parent'} || "--root",
5708                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5709                         or next;
5710                 my @difftree = map { chomp; $_ } <$fd>;
5711                 close $fd
5712                         or next;
5713
5714                 # print element (entry, item)
5715                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5716                 if ($format eq 'rss') {
5717                         print "<item>\n" .
5718                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5719                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5720                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5721                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5722                               "<link>$co_url</link>\n" .
5723                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5724                               "<content:encoded>" .
5725                               "<![CDATA[\n";
5726                 } elsif ($format eq 'atom') {
5727                         print "<entry>\n" .
5728                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5729                               "<updated>$cd{'iso-8601'}</updated>\n" .
5730                               "<author>\n" .
5731                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5732                         if ($co{'author_email'}) {
5733                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5734                         }
5735                         print "</author>\n" .
5736                               # use committer for contributor
5737                               "<contributor>\n" .
5738                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5739                         if ($co{'committer_email'}) {
5740                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5741                         }
5742                         print "</contributor>\n" .
5743                               "<published>$cd{'iso-8601'}</published>\n" .
5744                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5745                               "<id>$co_url</id>\n" .
5746                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5747                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5748                 }
5749                 my $comment = $co{'comment'};
5750                 print "<pre>\n";
5751                 foreach my $line (@$comment) {
5752                         $line = esc_html($line);
5753                         print "$line\n";
5754                 }
5755                 print "</pre><ul>\n";
5756                 foreach my $difftree_line (@difftree) {
5757                         my %difftree = parse_difftree_raw_line($difftree_line);
5758                         next if !$difftree{'from_id'};
5759
5760                         my $file = $difftree{'file'} || $difftree{'to_file'};
5761
5762                         print "<li>" .
5763                               "[" .
5764                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5765                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5766                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5767                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5768                                       -title => "diff"}, 'D');
5769                         if ($have_blame) {
5770                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5771                                                              file_name=>$file, hash_base=>$commit),
5772                                               -title => "blame"}, 'B');
5773                         }
5774                         # if this is not a feed of a file history
5775                         if (!defined $file_name || $file_name ne $file) {
5776                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5777                                                              file_name=>$file, hash=>$commit),
5778                                               -title => "history"}, 'H');
5779                         }
5780                         $file = esc_path($file);
5781                         print "] ".
5782                               "$file</li>\n";
5783                 }
5784                 if ($format eq 'rss') {
5785                         print "</ul>]]>\n" .
5786                               "</content:encoded>\n" .
5787                               "</item>\n";
5788                 } elsif ($format eq 'atom') {
5789                         print "</ul>\n</div>\n" .
5790                               "</content>\n" .
5791                               "</entry>\n";
5792                 }
5793         }
5794
5795         # end of feed
5796         if ($format eq 'rss') {
5797                 print "</channel>\n</rss>\n";
5798         }       elsif ($format eq 'atom') {
5799                 print "</feed>\n";
5800         }
5801 }
5802
5803 sub git_rss {
5804         git_feed('rss');
5805 }
5806
5807 sub git_atom {
5808         git_feed('atom');
5809 }
5810
5811 sub git_opml {
5812         my @list = git_get_projects_list();
5813
5814         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5815         print <<XML;
5816 <?xml version="1.0" encoding="utf-8"?>
5817 <opml version="1.0">
5818 <head>
5819   <title>$site_name OPML Export</title>
5820 </head>
5821 <body>
5822 <outline text="git RSS feeds">
5823 XML
5824
5825         foreach my $pr (@list) {
5826                 my %proj = %$pr;
5827                 my $head = git_get_head_hash($proj{'path'});
5828                 if (!defined $head) {
5829                         next;
5830                 }
5831                 $git_dir = "$projectroot/$proj{'path'}";
5832                 my %co = parse_commit($head);
5833                 if (!%co) {
5834                         next;
5835                 }
5836
5837                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5838                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5839                 my $html = "$my_url?p=$proj{'path'};a=summary";
5840                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5841         }
5842         print <<XML;
5843 </outline>
5844 </body>
5845 </opml>
5846 XML
5847 }