gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 if (-e $GITWEB_CONFIG) {
 373         do $GITWEB_CONFIG;
 374 } else {
 375         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 376         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 377 }
 378
 379 # version of the core git binary
 380 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 381
 382 $projects_list ||= $projectroot;
 383
 384 # ======================================================================
 385 # input validation and dispatch
 386 our $action = $cgi->param('a');
 387 if (defined $action) {
 388         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 389                 die_error(400, "Invalid action parameter");
 390         }
 391 }
 392
 393 # parameters which are pathnames
 394 our $project = $cgi->param('p');
 395 if (defined $project) {
 396         if (!validate_pathname($project) ||
 397             !(-d "$projectroot/$project") ||
 398             !check_head_link("$projectroot/$project") ||
 399             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 400             ($strict_export && !project_in_list($project))) {
 401                 undef $project;
 402                 die_error(404, "No such project");
 403         }
 404 }
 405
 406 our $file_name = $cgi->param('f');
 407 if (defined $file_name) {
 408         if (!validate_pathname($file_name)) {
 409                 die_error(400, "Invalid file parameter");
 410         }
 411 }
 412
 413 our $file_parent = $cgi->param('fp');
 414 if (defined $file_parent) {
 415         if (!validate_pathname($file_parent)) {
 416                 die_error(400, "Invalid file parent parameter");
 417         }
 418 }
 419
 420 # parameters which are refnames
 421 our $hash = $cgi->param('h');
 422 if (defined $hash) {
 423         if (!validate_refname($hash)) {
 424                 die_error(400, "Invalid hash parameter");
 425         }
 426 }
 427
 428 our $hash_parent = $cgi->param('hp');
 429 if (defined $hash_parent) {
 430         if (!validate_refname($hash_parent)) {
 431                 die_error(400, "Invalid hash parent parameter");
 432         }
 433 }
 434
 435 our $hash_base = $cgi->param('hb');
 436 if (defined $hash_base) {
 437         if (!validate_refname($hash_base)) {
 438                 die_error(400, "Invalid hash base parameter");
 439         }
 440 }
 441
 442 my %allowed_options = (
 443         "--no-merges" => [ qw(rss atom log shortlog history) ],
 444 );
 445
 446 our @extra_options = $cgi->param('opt');
 447 if (defined @extra_options) {
 448         foreach my $opt (@extra_options) {
 449                 if (not exists $allowed_options{$opt}) {
 450                         die_error(400, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(400, "Invalid option parameter for this action");
 454                 }
 455         }
 456 }
 457
 458 our $hash_parent_base = $cgi->param('hpb');
 459 if (defined $hash_parent_base) {
 460         if (!validate_refname($hash_parent_base)) {
 461                 die_error(400, "Invalid hash parent base parameter");
 462         }
 463 }
 464
 465 # other parameters
 466 our $page = $cgi->param('pg');
 467 if (defined $page) {
 468         if ($page =~ m/[^0-9]/) {
 469                 die_error(400, "Invalid page parameter");
 470         }
 471 }
 472
 473 our $searchtype = $cgi->param('st');
 474 if (defined $searchtype) {
 475         if ($searchtype =~ m/[^a-z]/) {
 476                 die_error(400, "Invalid searchtype parameter");
 477         }
 478 }
 479
 480 our $search_use_regexp = $cgi->param('sr');
 481
 482 our $searchtext = $cgi->param('s');
 483 our $search_regexp;
 484 if (defined $searchtext) {
 485         if (length($searchtext) < 2) {
 486                 die_error(403, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_blame,
 543         "blobdiff" => \&git_blobdiff,
 544         "blobdiff_plain" => \&git_blobdiff_plain,
 545         "blob" => \&git_blob,
 546         "blob_plain" => \&git_blob_plain,
 547         "commitdiff" => \&git_commitdiff,
 548         "commitdiff_plain" => \&git_commitdiff_plain,
 549         "commit" => \&git_commit,
 550         "forks" => \&git_forks,
 551         "heads" => \&git_heads,
 552         "history" => \&git_history,
 553         "log" => \&git_log,
 554         "rss" => \&git_rss,
 555         "atom" => \&git_atom,
 556         "search" => \&git_search,
 557         "search_help" => \&git_search_help,
 558         "shortlog" => \&git_shortlog,
 559         "summary" => \&git_summary,
 560         "tag" => \&git_tag,
 561         "tags" => \&git_tags,
 562         "tree" => \&git_tree,
 563         "snapshot" => \&git_snapshot,
 564         "object" => \&git_object,
 565         # those below don't need $project
 566         "opml" => \&git_opml,
 567         "project_list" => \&git_project_list,
 568         "project_index" => \&git_project_index,
 569 );
 570
 571 if (!defined $action) {
 572         if (defined $hash) {
 573                 $action = git_get_type($hash);
 574         } elsif (defined $hash_base && defined $file_name) {
 575                 $action = git_get_type("$hash_base:$file_name");
 576         } elsif (defined $project) {
 577                 $action = 'summary';
 578         } else {
 579                 $action = 'project_list';
 580         }
 581 }
 582 if (!defined($actions{$action})) {
 583         die_error(400, "Unknown action");
 584 }
 585 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 586     !$project) {
 587         die_error(400, "Project needed");
 588 }
 589 $actions{$action}->();
 590 exit;
 591
 592 ## ======================================================================
 593 ## action links
 594
 595 sub href (%) {
 596         my %params = @_;
 597         # default is to use -absolute url() i.e. $my_uri
 598         my $href = $params{-full} ? $my_url : $my_uri;
 599
 600         # XXX: Warning: If you touch this, check the search form for updating,
 601         # too.
 602
 603         my @mapping = (
 604                 project => "p",
 605                 action => "a",
 606                 file_name => "f",
 607                 file_parent => "fp",
 608                 hash => "h",
 609                 hash_parent => "hp",
 610                 hash_base => "hb",
 611                 hash_parent_base => "hpb",
 612                 page => "pg",
 613                 order => "o",
 614                 searchtext => "s",
 615                 searchtype => "st",
 616                 snapshot_format => "sf",
 617                 extra_options => "opt",
 618                 search_use_regexp => "sr",
 619         );
 620         my %mapping = @mapping;
 621
 622         $params{'project'} = $project unless exists $params{'project'};
 623
 624         if ($params{-replay}) {
 625                 while (my ($name, $symbol) = each %mapping) {
 626                         if (!exists $params{$name}) {
 627                                 # to allow for multivalued params we use arrayref form
 628                                 $params{$name} = [ $cgi->param($symbol) ];
 629                         }
 630                 }
 631         }
 632
 633         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 634         if ($use_pathinfo) {
 635                 # use PATH_INFO for project name
 636                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 637                 delete $params{'project'};
 638
 639                 # Summary just uses the project path URL
 640                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 641                         delete $params{'action'};
 642                 }
 643         }
 644
 645         # now encode the parameters explicitly
 646         my @result = ();
 647         for (my $i = 0; $i < @mapping; $i += 2) {
 648                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 649                 if (defined $params{$name}) {
 650                         if (ref($params{$name}) eq "ARRAY") {
 651                                 foreach my $par (@{$params{$name}}) {
 652                                         push @result, $symbol . "=" . esc_param($par);
 653                                 }
 654                         } else {
 655                                 push @result, $symbol . "=" . esc_param($params{$name});
 656                         }
 657                 }
 658         }
 659         $href .= "?" . join(';', @result) if scalar @result;
 660
 661         return $href;
 662 }
 663
 664
 665 ## ======================================================================
 666 ## validation, quoting/unquoting and escaping
 667
 668 sub validate_pathname {
 669         my $input = shift || return undef;
 670
 671         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 672         # at the beginning, at the end, and between slashes.
 673         # also this catches doubled slashes
 674         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 675                 return undef;
 676         }
 677         # no null characters
 678         if ($input =~ m!\0!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 sub validate_refname {
 685         my $input = shift || return undef;
 686
 687         # textual hashes are O.K.
 688         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 689                 return $input;
 690         }
 691         # it must be correct pathname
 692         $input = validate_pathname($input)
 693                 or return undef;
 694         # restrictions on ref name according to git-check-ref-format
 695         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 696                 return undef;
 697         }
 698         return $input;
 699 }
 700
 701 # decode sequences of octets in utf8 into Perl's internal form,
 702 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 703 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 704 sub to_utf8 {
 705         my $str = shift;
 706         if (utf8::valid($str)) {
 707                 utf8::decode($str);
 708                 return $str;
 709         } else {
 710                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 711         }
 712 }
 713
 714 # quote unsafe chars, but keep the slash, even when it's not
 715 # correct, but quoted slashes look too horrible in bookmarks
 716 sub esc_param {
 717         my $str = shift;
 718         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 719         $str =~ s/\+/%2B/g;
 720         $str =~ s/ /\+/g;
 721         return $str;
 722 }
 723
 724 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 725 sub esc_url {
 726         my $str = shift;
 727         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 728         $str =~ s/\+/%2B/g;
 729         $str =~ s/ /\+/g;
 730         return $str;
 731 }
 732
 733 # replace invalid utf8 character with SUBSTITUTION sequence
 734 sub esc_html ($;%) {
 735         my $str = shift;
 736         my %opts = @_;
 737
 738         $str = to_utf8($str);
 739         $str = $cgi->escapeHTML($str);
 740         if ($opts{'-nbsp'}) {
 741                 $str =~ s/ /&nbsp;/g;
 742         }
 743         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 744         return $str;
 745 }
 746
 747 # quote control characters and escape filename to HTML
 748 sub esc_path {
 749         my $str = shift;
 750         my %opts = @_;
 751
 752         $str = to_utf8($str);
 753         $str = $cgi->escapeHTML($str);
 754         if ($opts{'-nbsp'}) {
 755                 $str =~ s/ /&nbsp;/g;
 756         }
 757         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 758         return $str;
 759 }
 760
 761 # Make control characters "printable", using character escape codes (CEC)
 762 sub quot_cec {
 763         my $cntrl = shift;
 764         my %opts = @_;
 765         my %es = ( # character escape codes, aka escape sequences
 766                 "\t" => '\t',   # tab            (HT)
 767                 "\n" => '\n',   # line feed      (LF)
 768                 "\r" => '\r',   # carrige return (CR)
 769                 "\f" => '\f',   # form feed      (FF)
 770                 "\b" => '\b',   # backspace      (BS)
 771                 "\a" => '\a',   # alarm (bell)   (BEL)
 772                 "\e" => '\e',   # escape         (ESC)
 773                 "\013" => '\v', # vertical tab   (VT)
 774                 "\000" => '\0', # nul character  (NUL)
 775         );
 776         my $chr = ( (exists $es{$cntrl})
 777                     ? $es{$cntrl}
 778                     : sprintf('\%03o', ord($cntrl)) );
 779         if ($opts{-nohtml}) {
 780                 return $chr;
 781         } else {
 782                 return "<span class=\"cntrl\">$chr</span>";
 783         }
 784 }
 785
 786 # Alternatively use unicode control pictures codepoints,
 787 # Unicode "printable representation" (PR)
 788 sub quot_upr {
 789         my $cntrl = shift;
 790         my %opts = @_;
 791
 792         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 793         if ($opts{-nohtml}) {
 794                 return $chr;
 795         } else {
 796                 return "<span class=\"cntrl\">$chr</span>";
 797         }
 798 }
 799
 800 # git may return quoted and escaped filenames
 801 sub unquote {
 802         my $str = shift;
 803
 804         sub unq {
 805                 my $seq = shift;
 806                 my %es = ( # character escape codes, aka escape sequences
 807                         't' => "\t",   # tab            (HT, TAB)
 808                         'n' => "\n",   # newline        (NL)
 809                         'r' => "\r",   # return         (CR)
 810                         'f' => "\f",   # form feed      (FF)
 811                         'b' => "\b",   # backspace      (BS)
 812                         'a' => "\a",   # alarm (bell)   (BEL)
 813                         'e' => "\e",   # escape         (ESC)
 814                         'v' => "\013", # vertical tab   (VT)
 815                 );
 816
 817                 if ($seq =~ m/^[0-7]{1,3}$/) {
 818                         # octal char sequence
 819                         return chr(oct($seq));
 820                 } elsif (exists $es{$seq}) {
 821                         # C escape sequence, aka character escape code
 822                         return $es{$seq};
 823                 }
 824                 # quoted ordinary character
 825                 return $seq;
 826         }
 827
 828         if ($str =~ m/^"(.*)"$/) {
 829                 # needs unquoting
 830                 $str = $1;
 831                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 832         }
 833         return $str;
 834 }
 835
 836 # escape tabs (convert tabs to spaces)
 837 sub untabify {
 838         my $line = shift;
 839
 840         while ((my $pos = index($line, "\t")) != -1) {
 841                 if (my $count = (8 - ($pos % 8))) {
 842                         my $spaces = ' ' x $count;
 843                         $line =~ s/\t/$spaces/;
 844                 }
 845         }
 846
 847         return $line;
 848 }
 849
 850 sub project_in_list {
 851         my $project = shift;
 852         my @list = git_get_projects_list();
 853         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 854 }
 855
 856 ## ----------------------------------------------------------------------
 857 ## HTML aware string manipulation
 858
 859 # Try to chop given string on a word boundary between position
 860 # $len and $len+$add_len. If there is no word boundary there,
 861 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 862 # (marking chopped part) would be longer than given string.
 863 sub chop_str {
 864         my $str = shift;
 865         my $len = shift;
 866         my $add_len = shift || 10;
 867         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 868
 869         # Make sure perl knows it is utf8 encoded so we don't
 870         # cut in the middle of a utf8 multibyte char.
 871         $str = to_utf8($str);
 872
 873         # allow only $len chars, but don't cut a word if it would fit in $add_len
 874         # if it doesn't fit, cut it if it's still longer than the dots we would add
 875         # remove chopped character entities entirely
 876
 877         # when chopping in the middle, distribute $len into left and right part
 878         # return early if chopping wouldn't make string shorter
 879         if ($where eq 'center') {
 880                 return $str if ($len + 5 >= length($str)); # filler is length 5
 881                 $len = int($len/2);
 882         } else {
 883                 return $str if ($len + 4 >= length($str)); # filler is length 4
 884         }
 885
 886         # regexps: ending and beginning with word part up to $add_len
 887         my $endre = qr/.{$len}\w{0,$add_len}/;
 888         my $begre = qr/\w{0,$add_len}.{$len}/;
 889
 890         if ($where eq 'left') {
 891                 $str =~ m/^(.*?)($begre)$/;
 892                 my ($lead, $body) = ($1, $2);
 893                 if (length($lead) > 4) {
 894                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 895                         $lead = " ...";
 896                 }
 897                 return "$lead$body";
 898
 899         } elsif ($where eq 'center') {
 900                 $str =~ m/^($endre)(.*)$/;
 901                 my ($left, $str)  = ($1, $2);
 902                 $str =~ m/^(.*?)($begre)$/;
 903                 my ($mid, $right) = ($1, $2);
 904                 if (length($mid) > 5) {
 905                         $left  =~ s/&[^;]*$//;
 906                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 907                         $mid = " ... ";
 908                 }
 909                 return "$left$mid$right";
 910
 911         } else {
 912                 $str =~ m/^($endre)(.*)$/;
 913                 my $body = $1;
 914                 my $tail = $2;
 915                 if (length($tail) > 4) {
 916                         $body =~ s/&[^;]*$//;
 917                         $tail = "... ";
 918                 }
 919                 return "$body$tail";
 920         }
 921 }
 922
 923 # takes the same arguments as chop_str, but also wraps a <span> around the
 924 # result with a title attribute if it does get chopped. Additionally, the
 925 # string is HTML-escaped.
 926 sub chop_and_escape_str {
 927         my ($str) = @_;
 928
 929         my $chopped = chop_str(@_);
 930         if ($chopped eq $str) {
 931                 return esc_html($chopped);
 932         } else {
 933                 $str =~ s/([[:cntrl:]])/?/g;
 934                 return $cgi->span({-title=>$str}, esc_html($chopped));
 935         }
 936 }
 937
 938 ## ----------------------------------------------------------------------
 939 ## functions returning short strings
 940
 941 # CSS class for given age value (in seconds)
 942 sub age_class {
 943         my $age = shift;
 944
 945         if (!defined $age) {
 946                 return "noage";
 947         } elsif ($age < 60*60*2) {
 948                 return "age0";
 949         } elsif ($age < 60*60*24*2) {
 950                 return "age1";
 951         } else {
 952                 return "age2";
 953         }
 954 }
 955
 956 # convert age in seconds to "nn units ago" string
 957 sub age_string {
 958         my $age = shift;
 959         my $age_str;
 960
 961         if ($age > 60*60*24*365*2) {
 962                 $age_str = (int $age/60/60/24/365);
 963                 $age_str .= " years ago";
 964         } elsif ($age > 60*60*24*(365/12)*2) {
 965                 $age_str = int $age/60/60/24/(365/12);
 966                 $age_str .= " months ago";
 967         } elsif ($age > 60*60*24*7*2) {
 968                 $age_str = int $age/60/60/24/7;
 969                 $age_str .= " weeks ago";
 970         } elsif ($age > 60*60*24*2) {
 971                 $age_str = int $age/60/60/24;
 972                 $age_str .= " days ago";
 973         } elsif ($age > 60*60*2) {
 974                 $age_str = int $age/60/60;
 975                 $age_str .= " hours ago";
 976         } elsif ($age > 60*2) {
 977                 $age_str = int $age/60;
 978                 $age_str .= " min ago";
 979         } elsif ($age > 2) {
 980                 $age_str = int $age;
 981                 $age_str .= " sec ago";
 982         } else {
 983                 $age_str .= " right now";
 984         }
 985         return $age_str;
 986 }
 987
 988 use constant {
 989         S_IFINVALID => 0030000,
 990         S_IFGITLINK => 0160000,
 991 };
 992
 993 # submodule/subproject, a commit object reference
 994 sub S_ISGITLINK($) {
 995         my $mode = shift;
 996
 997         return (($mode & S_IFMT) == S_IFGITLINK)
 998 }
 999
1000 # convert file mode in octal to symbolic file mode string
1001 sub mode_str {
1002         my $mode = oct shift;
1003
1004         if (S_ISGITLINK($mode)) {
1005                 return 'm---------';
1006         } elsif (S_ISDIR($mode & S_IFMT)) {
1007                 return 'drwxr-xr-x';
1008         } elsif (S_ISLNK($mode)) {
1009                 return 'lrwxrwxrwx';
1010         } elsif (S_ISREG($mode)) {
1011                 # git cares only about the executable bit
1012                 if ($mode & S_IXUSR) {
1013                         return '-rwxr-xr-x';
1014                 } else {
1015                         return '-rw-r--r--';
1016                 };
1017         } else {
1018                 return '----------';
1019         }
1020 }
1021
1022 # convert file mode in octal to file type string
1023 sub file_type {
1024         my $mode = shift;
1025
1026         if ($mode !~ m/^[0-7]+$/) {
1027                 return $mode;
1028         } else {
1029                 $mode = oct $mode;
1030         }
1031
1032         if (S_ISGITLINK($mode)) {
1033                 return "submodule";
1034         } elsif (S_ISDIR($mode & S_IFMT)) {
1035                 return "directory";
1036         } elsif (S_ISLNK($mode)) {
1037                 return "symlink";
1038         } elsif (S_ISREG($mode)) {
1039                 return "file";
1040         } else {
1041                 return "unknown";
1042         }
1043 }
1044
1045 # convert file mode in octal to file type description string
1046 sub file_type_long {
1047         my $mode = shift;
1048
1049         if ($mode !~ m/^[0-7]+$/) {
1050                 return $mode;
1051         } else {
1052                 $mode = oct $mode;
1053         }
1054
1055         if (S_ISGITLINK($mode)) {
1056                 return "submodule";
1057         } elsif (S_ISDIR($mode & S_IFMT)) {
1058                 return "directory";
1059         } elsif (S_ISLNK($mode)) {
1060                 return "symlink";
1061         } elsif (S_ISREG($mode)) {
1062                 if ($mode & S_IXUSR) {
1063                         return "executable";
1064                 } else {
1065                         return "file";
1066                 };
1067         } else {
1068                 return "unknown";
1069         }
1070 }
1071
1072
1073 ## ----------------------------------------------------------------------
1074 ## functions returning short HTML fragments, or transforming HTML fragments
1075 ## which don't belong to other sections
1076
1077 # format line of commit message.
1078 sub format_log_line_html {
1079         my $line = shift;
1080
1081         $line = esc_html($line, -nbsp=>1);
1082         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1083                 my $hash_text = $1;
1084                 my $link =
1085                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1086                                 -class => "text"}, $hash_text);
1087                 $line =~ s/$hash_text/$link/;
1088         }
1089         return $line;
1090 }
1091
1092 # format marker of refs pointing to given object
1093 sub format_ref_marker {
1094         my ($refs, $id) = @_;
1095         my $markers = '';
1096
1097         if (defined $refs->{$id}) {
1098                 foreach my $ref (@{$refs->{$id}}) {
1099                         my ($type, $name) = qw();
1100                         # e.g. tags/v2.6.11 or heads/next
1101                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1102                                 $type = $1;
1103                                 $name = $2;
1104                         } else {
1105                                 $type = "ref";
1106                                 $name = $ref;
1107                         }
1108
1109                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1110                                     esc_html($name) . "</span>";
1111                 }
1112         }
1113
1114         if ($markers) {
1115                 return ' <span class="refs">'. $markers . '</span>';
1116         } else {
1117                 return "";
1118         }
1119 }
1120
1121 # format, perhaps shortened and with markers, title line
1122 sub format_subject_html {
1123         my ($long, $short, $href, $extra) = @_;
1124         $extra = '' unless defined($extra);
1125
1126         if (length($short) < length($long)) {
1127                 return $cgi->a({-href => $href, -class => "list subject",
1128                                 -title => to_utf8($long)},
1129                        esc_html($short) . $extra);
1130         } else {
1131                 return $cgi->a({-href => $href, -class => "list subject"},
1132                        esc_html($long)  . $extra);
1133         }
1134 }
1135
1136 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1137 sub format_git_diff_header_line {
1138         my $line = shift;
1139         my $diffinfo = shift;
1140         my ($from, $to) = @_;
1141
1142         if ($diffinfo->{'nparents'}) {
1143                 # combined diff
1144                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1145                 if ($to->{'href'}) {
1146                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1147                                          esc_path($to->{'file'}));
1148                 } else { # file was deleted (no href)
1149                         $line .= esc_path($to->{'file'});
1150                 }
1151         } else {
1152                 # "ordinary" diff
1153                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1154                 if ($from->{'href'}) {
1155                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1156                                          'a/' . esc_path($from->{'file'}));
1157                 } else { # file was added (no href)
1158                         $line .= 'a/' . esc_path($from->{'file'});
1159                 }
1160                 $line .= ' ';
1161                 if ($to->{'href'}) {
1162                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1163                                          'b/' . esc_path($to->{'file'}));
1164                 } else { # file was deleted
1165                         $line .= 'b/' . esc_path($to->{'file'});
1166                 }
1167         }
1168
1169         return "<div class=\"diff header\">$line</div>\n";
1170 }
1171
1172 # format extended diff header line, before patch itself
1173 sub format_extended_diff_header_line {
1174         my $line = shift;
1175         my $diffinfo = shift;
1176         my ($from, $to) = @_;
1177
1178         # match <path>
1179         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1180                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1181                                        esc_path($from->{'file'}));
1182         }
1183         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1184                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1185                                  esc_path($to->{'file'}));
1186         }
1187         # match single <mode>
1188         if ($line =~ m/\s(\d{6})$/) {
1189                 $line .= '<span class="info"> (' .
1190                          file_type_long($1) .
1191                          ')</span>';
1192         }
1193         # match <hash>
1194         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1195                 # can match only for combined diff
1196                 $line = 'index ';
1197                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1198                         if ($from->{'href'}[$i]) {
1199                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1200                                                   -class=>"hash"},
1201                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1202                         } else {
1203                                 $line .= '0' x 7;
1204                         }
1205                         # separator
1206                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1207                 }
1208                 $line .= '..';
1209                 if ($to->{'href'}) {
1210                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1211                                          substr($diffinfo->{'to_id'},0,7));
1212                 } else {
1213                         $line .= '0' x 7;
1214                 }
1215
1216         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1217                 # can match only for ordinary diff
1218                 my ($from_link, $to_link);
1219                 if ($from->{'href'}) {
1220                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1221                                              substr($diffinfo->{'from_id'},0,7));
1222                 } else {
1223                         $from_link = '0' x 7;
1224                 }
1225                 if ($to->{'href'}) {
1226                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1227                                            substr($diffinfo->{'to_id'},0,7));
1228                 } else {
1229                         $to_link = '0' x 7;
1230                 }
1231                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1232                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1233         }
1234
1235         return $line . "<br/>\n";
1236 }
1237
1238 # format from-file/to-file diff header
1239 sub format_diff_from_to_header {
1240         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1241         my $line;
1242         my $result = '';
1243
1244         $line = $from_line;
1245         #assert($line =~ m/^---/) if DEBUG;
1246         # no extra formatting for "^--- /dev/null"
1247         if (! $diffinfo->{'nparents'}) {
1248                 # ordinary (single parent) diff
1249                 if ($line =~ m!^--- "?a/!) {
1250                         if ($from->{'href'}) {
1251                                 $line = '--- a/' .
1252                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1253                                                 esc_path($from->{'file'}));
1254                         } else {
1255                                 $line = '--- a/' .
1256                                         esc_path($from->{'file'});
1257                         }
1258                 }
1259                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1260
1261         } else {
1262                 # combined diff (merge commit)
1263                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1264                         if ($from->{'href'}[$i]) {
1265                                 $line = '--- ' .
1266                                         $cgi->a({-href=>href(action=>"blobdiff",
1267                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1268                                                              hash_parent_base=>$parents[$i],
1269                                                              file_parent=>$from->{'file'}[$i],
1270                                                              hash=>$diffinfo->{'to_id'},
1271                                                              hash_base=>$hash,
1272                                                              file_name=>$to->{'file'}),
1273                                                  -class=>"path",
1274                                                  -title=>"diff" . ($i+1)},
1275                                                 $i+1) .
1276                                         '/' .
1277                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1278                                                 esc_path($from->{'file'}[$i]));
1279                         } else {
1280                                 $line = '--- /dev/null';
1281                         }
1282                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1283                 }
1284         }
1285
1286         $line = $to_line;
1287         #assert($line =~ m/^\+\+\+/) if DEBUG;
1288         # no extra formatting for "^+++ /dev/null"
1289         if ($line =~ m!^\+\+\+ "?b/!) {
1290                 if ($to->{'href'}) {
1291                         $line = '+++ b/' .
1292                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1293                                         esc_path($to->{'file'}));
1294                 } else {
1295                         $line = '+++ b/' .
1296                                 esc_path($to->{'file'});
1297                 }
1298         }
1299         $result .= qq!<div class="diff to_file">$line</div>\n!;
1300
1301         return $result;
1302 }
1303
1304 # create note for patch simplified by combined diff
1305 sub format_diff_cc_simplified {
1306         my ($diffinfo, @parents) = @_;
1307         my $result = '';
1308
1309         $result .= "<div class=\"diff header\">" .
1310                    "diff --cc ";
1311         if (!is_deleted($diffinfo)) {
1312                 $result .= $cgi->a({-href => href(action=>"blob",
1313                                                   hash_base=>$hash,
1314                                                   hash=>$diffinfo->{'to_id'},
1315                                                   file_name=>$diffinfo->{'to_file'}),
1316                                     -class => "path"},
1317                                    esc_path($diffinfo->{'to_file'}));
1318         } else {
1319                 $result .= esc_path($diffinfo->{'to_file'});
1320         }
1321         $result .= "</div>\n" . # class="diff header"
1322                    "<div class=\"diff nodifferences\">" .
1323                    "Simple merge" .
1324                    "</div>\n"; # class="diff nodifferences"
1325
1326         return $result;
1327 }
1328
1329 # format patch (diff) line (not to be used for diff headers)
1330 sub format_diff_line {
1331         my $line = shift;
1332         my ($from, $to) = @_;
1333         my $diff_class = "";
1334
1335         chomp $line;
1336
1337         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1338                 # combined diff
1339                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1340                 if ($line =~ m/^\@{3}/) {
1341                         $diff_class = " chunk_header";
1342                 } elsif ($line =~ m/^\\/) {
1343                         $diff_class = " incomplete";
1344                 } elsif ($prefix =~ tr/+/+/) {
1345                         $diff_class = " add";
1346                 } elsif ($prefix =~ tr/-/-/) {
1347                         $diff_class = " rem";
1348                 }
1349         } else {
1350                 # assume ordinary diff
1351                 my $char = substr($line, 0, 1);
1352                 if ($char eq '+') {
1353                         $diff_class = " add";
1354                 } elsif ($char eq '-') {
1355                         $diff_class = " rem";
1356                 } elsif ($char eq '@') {
1357                         $diff_class = " chunk_header";
1358                 } elsif ($char eq "\\") {
1359                         $diff_class = " incomplete";
1360                 }
1361         }
1362         $line = untabify($line);
1363         if ($from && $to && $line =~ m/^\@{2} /) {
1364                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1365                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1366
1367                 $from_lines = 0 unless defined $from_lines;
1368                 $to_lines   = 0 unless defined $to_lines;
1369
1370                 if ($from->{'href'}) {
1371                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1372                                              -class=>"list"}, $from_text);
1373                 }
1374                 if ($to->{'href'}) {
1375                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1376                                              -class=>"list"}, $to_text);
1377                 }
1378                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1379                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1380                 return "<div class=\"diff$diff_class\">$line</div>\n";
1381         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1382                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1383                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1384
1385                 @from_text = split(' ', $ranges);
1386                 for (my $i = 0; $i < @from_text; ++$i) {
1387                         ($from_start[$i], $from_nlines[$i]) =
1388                                 (split(',', substr($from_text[$i], 1)), 0);
1389                 }
1390
1391                 $to_text   = pop @from_text;
1392                 $to_start  = pop @from_start;
1393                 $to_nlines = pop @from_nlines;
1394
1395                 $line = "<span class=\"chunk_info\">$prefix ";
1396                 for (my $i = 0; $i < @from_text; ++$i) {
1397                         if ($from->{'href'}[$i]) {
1398                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1399                                                   -class=>"list"}, $from_text[$i]);
1400                         } else {
1401                                 $line .= $from_text[$i];
1402                         }
1403                         $line .= " ";
1404                 }
1405                 if ($to->{'href'}) {
1406                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1407                                           -class=>"list"}, $to_text);
1408                 } else {
1409                         $line .= $to_text;
1410                 }
1411                 $line .= " $prefix</span>" .
1412                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1413                 return "<div class=\"diff$diff_class\">$line</div>\n";
1414         }
1415         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1416 }
1417
1418 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1419 # linked.  Pass the hash of the tree/commit to snapshot.
1420 sub format_snapshot_links {
1421         my ($hash) = @_;
1422         my @snapshot_fmts = gitweb_check_feature('snapshot');
1423         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1424         my $num_fmts = @snapshot_fmts;
1425         if ($num_fmts > 1) {
1426                 # A parenthesized list of links bearing format names.
1427                 # e.g. "snapshot (_tar.gz_ _zip_)"
1428                 return "snapshot (" . join(' ', map
1429                         $cgi->a({
1430                                 -href => href(
1431                                         action=>"snapshot",
1432                                         hash=>$hash,
1433                                         snapshot_format=>$_
1434                                 )
1435                         }, $known_snapshot_formats{$_}{'display'})
1436                 , @snapshot_fmts) . ")";
1437         } elsif ($num_fmts == 1) {
1438                 # A single "snapshot" link whose tooltip bears the format name.
1439                 # i.e. "_snapshot_"
1440                 my ($fmt) = @snapshot_fmts;
1441                 return
1442                         $cgi->a({
1443                                 -href => href(
1444                                         action=>"snapshot",
1445                                         hash=>$hash,
1446                                         snapshot_format=>$fmt
1447                                 ),
1448                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1449                         }, "snapshot");
1450         } else { # $num_fmts == 0
1451                 return undef;
1452         }
1453 }
1454
1455 ## ......................................................................
1456 ## functions returning values to be passed, perhaps after some
1457 ## transformation, to other functions; e.g. returning arguments to href()
1458
1459 # returns hash to be passed to href to generate gitweb URL
1460 # in -title key it returns description of link
1461 sub get_feed_info {
1462         my $format = shift || 'Atom';
1463         my %res = (action => lc($format));
1464
1465         # feed links are possible only for project views
1466         return unless (defined $project);
1467         # some views should link to OPML, or to generic project feed,
1468         # or don't have specific feed yet (so they should use generic)
1469         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1470
1471         my $branch;
1472         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1473         # from tag links; this also makes possible to detect branch links
1474         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1475             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1476                 $branch = $1;
1477         }
1478         # find log type for feed description (title)
1479         my $type = 'log';
1480         if (defined $file_name) {
1481                 $type  = "history of $file_name";
1482                 $type .= "/" if ($action eq 'tree');
1483                 $type .= " on '$branch'" if (defined $branch);
1484         } else {
1485                 $type = "log of $branch" if (defined $branch);
1486         }
1487
1488         $res{-title} = $type;
1489         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1490         $res{'file_name'} = $file_name;
1491
1492         return %res;
1493 }
1494
1495 ## ----------------------------------------------------------------------
1496 ## git utility subroutines, invoking git commands
1497
1498 # returns path to the core git executable and the --git-dir parameter as list
1499 sub git_cmd {
1500         return $GIT, '--git-dir='.$git_dir;
1501 }
1502
1503 # quote the given arguments for passing them to the shell
1504 # quote_command("command", "arg 1", "arg with ' and ! characters")
1505 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1506 # Try to avoid using this function wherever possible.
1507 sub quote_command {
1508         return join(' ',
1509                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1510 }
1511
1512 # get HEAD ref of given project as hash
1513 sub git_get_head_hash {
1514         my $project = shift;
1515         my $o_git_dir = $git_dir;
1516         my $retval = undef;
1517         $git_dir = "$projectroot/$project";
1518         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1519                 my $head = <$fd>;
1520                 close $fd;
1521                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1522                         $retval = $1;
1523                 }
1524         }
1525         if (defined $o_git_dir) {
1526                 $git_dir = $o_git_dir;
1527         }
1528         return $retval;
1529 }
1530
1531 # get type of given object
1532 sub git_get_type {
1533         my $hash = shift;
1534
1535         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1536         my $type = <$fd>;
1537         close $fd or return;
1538         chomp $type;
1539         return $type;
1540 }
1541
1542 # repository configuration
1543 our $config_file = '';
1544 our %config;
1545
1546 # store multiple values for single key as anonymous array reference
1547 # single values stored directly in the hash, not as [ <value> ]
1548 sub hash_set_multi {
1549         my ($hash, $key, $value) = @_;
1550
1551         if (!exists $hash->{$key}) {
1552                 $hash->{$key} = $value;
1553         } elsif (!ref $hash->{$key}) {
1554                 $hash->{$key} = [ $hash->{$key}, $value ];
1555         } else {
1556                 push @{$hash->{$key}}, $value;
1557         }
1558 }
1559
1560 # return hash of git project configuration
1561 # optionally limited to some section, e.g. 'gitweb'
1562 sub git_parse_project_config {
1563         my $section_regexp = shift;
1564         my %config;
1565
1566         local $/ = "\0";
1567
1568         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1569                 or return;
1570
1571         while (my $keyval = <$fh>) {
1572                 chomp $keyval;
1573                 my ($key, $value) = split(/\n/, $keyval, 2);
1574
1575                 hash_set_multi(\%config, $key, $value)
1576                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1577         }
1578         close $fh;
1579
1580         return %config;
1581 }
1582
1583 # convert config value to boolean, 'true' or 'false'
1584 # no value, number > 0, 'true' and 'yes' values are true
1585 # rest of values are treated as false (never as error)
1586 sub config_to_bool {
1587         my $val = shift;
1588
1589         # strip leading and trailing whitespace
1590         $val =~ s/^\s+//;
1591         $val =~ s/\s+$//;
1592
1593         return (!defined $val ||               # section.key
1594                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1595                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1596 }
1597
1598 # convert config value to simple decimal number
1599 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1600 # to be multiplied by 1024, 1048576, or 1073741824
1601 sub config_to_int {
1602         my $val = shift;
1603
1604         # strip leading and trailing whitespace
1605         $val =~ s/^\s+//;
1606         $val =~ s/\s+$//;
1607
1608         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1609                 $unit = lc($unit);
1610                 # unknown unit is treated as 1
1611                 return $num * ($unit eq 'g' ? 1073741824 :
1612                                $unit eq 'm' ?    1048576 :
1613                                $unit eq 'k' ?       1024 : 1);
1614         }
1615         return $val;
1616 }
1617
1618 # convert config value to array reference, if needed
1619 sub config_to_multi {
1620         my $val = shift;
1621
1622         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1623 }
1624
1625 sub git_get_project_config {
1626         my ($key, $type) = @_;
1627
1628         # key sanity check
1629         return unless ($key);
1630         $key =~ s/^gitweb\.//;
1631         return if ($key =~ m/\W/);
1632
1633         # type sanity check
1634         if (defined $type) {
1635                 $type =~ s/^--//;
1636                 $type = undef
1637                         unless ($type eq 'bool' || $type eq 'int');
1638         }
1639
1640         # get config
1641         if (!defined $config_file ||
1642             $config_file ne "$git_dir/config") {
1643                 %config = git_parse_project_config('gitweb');
1644                 $config_file = "$git_dir/config";
1645         }
1646
1647         # ensure given type
1648         if (!defined $type) {
1649                 return $config{"gitweb.$key"};
1650         } elsif ($type eq 'bool') {
1651                 # backward compatibility: 'git config --bool' returns true/false
1652                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1653         } elsif ($type eq 'int') {
1654                 return config_to_int($config{"gitweb.$key"});
1655         }
1656         return $config{"gitweb.$key"};
1657 }
1658
1659 # get hash of given path at given ref
1660 sub git_get_hash_by_path {
1661         my $base = shift;
1662         my $path = shift || return undef;
1663         my $type = shift;
1664
1665         $path =~ s,/+$,,;
1666
1667         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1668                 or die_error(500, "Open git-ls-tree failed");
1669         my $line = <$fd>;
1670         close $fd or return undef;
1671
1672         if (!defined $line) {
1673                 # there is no tree or hash given by $path at $base
1674                 return undef;
1675         }
1676
1677         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1678         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1679         if (defined $type && $type ne $2) {
1680                 # type doesn't match
1681                 return undef;
1682         }
1683         return $3;
1684 }
1685
1686 # get path of entry with given hash at given tree-ish (ref)
1687 # used to get 'from' filename for combined diff (merge commit) for renames
1688 sub git_get_path_by_hash {
1689         my $base = shift || return;
1690         my $hash = shift || return;
1691
1692         local $/ = "\0";
1693
1694         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1695                 or return undef;
1696         while (my $line = <$fd>) {
1697                 chomp $line;
1698
1699                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1700                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1701                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1702                         close $fd;
1703                         return $1;
1704                 }
1705         }
1706         close $fd;
1707         return undef;
1708 }
1709
1710 ## ......................................................................
1711 ## git utility functions, directly accessing git repository
1712
1713 sub git_get_project_description {
1714         my $path = shift;
1715
1716         $git_dir = "$projectroot/$path";
1717         open my $fd, "$git_dir/description"
1718                 or return git_get_project_config('description');
1719         my $descr = <$fd>;
1720         close $fd;
1721         if (defined $descr) {
1722                 chomp $descr;
1723         }
1724         return $descr;
1725 }
1726
1727 sub git_get_project_url_list {
1728         my $path = shift;
1729
1730         $git_dir = "$projectroot/$path";
1731         open my $fd, "$git_dir/cloneurl"
1732                 or return wantarray ?
1733                 @{ config_to_multi(git_get_project_config('url')) } :
1734                    config_to_multi(git_get_project_config('url'));
1735         my @git_project_url_list = map { chomp; $_ } <$fd>;
1736         close $fd;
1737
1738         return wantarray ? @git_project_url_list : \@git_project_url_list;
1739 }
1740
1741 sub git_get_projects_list {
1742         my ($filter) = @_;
1743         my @list;
1744
1745         $filter ||= '';
1746         $filter =~ s/\.git$//;
1747
1748         my ($check_forks) = gitweb_check_feature('forks');
1749
1750         if (-d $projects_list) {
1751                 # search in directory
1752                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1753                 # remove the trailing "/"
1754                 $dir =~ s!/+$!!;
1755                 my $pfxlen = length("$dir");
1756                 my $pfxdepth = ($dir =~ tr!/!!);
1757
1758                 File::Find::find({
1759                         follow_fast => 1, # follow symbolic links
1760                         follow_skip => 2, # ignore duplicates
1761                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1762                         wanted => sub {
1763                                 # skip project-list toplevel, if we get it.
1764                                 return if (m!^[/.]$!);
1765                                 # only directories can be git repositories
1766                                 return unless (-d $_);
1767                                 # don't traverse too deep (Find is super slow on os x)
1768                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1769                                         $File::Find::prune = 1;
1770                                         return;
1771                                 }
1772
1773                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1774                                 # we check related file in $projectroot
1775                                 if ($check_forks and $subdir =~ m#/.#) {
1776                                         $File::Find::prune = 1;
1777                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1778                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1779                                         $File::Find::prune = 1;
1780                                 }
1781                         },
1782                 }, "$dir");
1783
1784         } elsif (-f $projects_list) {
1785                 # read from file(url-encoded):
1786                 # 'git%2Fgit.git Linus+Torvalds'
1787                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1788                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1789                 my %paths;
1790                 open my ($fd), $projects_list or return;
1791         PROJECT:
1792                 while (my $line = <$fd>) {
1793                         chomp $line;
1794                         my ($path, $owner) = split ' ', $line;
1795                         $path = unescape($path);
1796                         $owner = unescape($owner);
1797                         if (!defined $path) {
1798                                 next;
1799                         }
1800                         if ($filter ne '') {
1801                                 # looking for forks;
1802                                 my $pfx = substr($path, 0, length($filter));
1803                                 if ($pfx ne $filter) {
1804                                         next PROJECT;
1805                                 }
1806                                 my $sfx = substr($path, length($filter));
1807                                 if ($sfx !~ /^\/.*\.git$/) {
1808                                         next PROJECT;
1809                                 }
1810                         } elsif ($check_forks) {
1811                         PATH:
1812                                 foreach my $filter (keys %paths) {
1813                                         # looking for forks;
1814                                         my $pfx = substr($path, 0, length($filter));
1815                                         if ($pfx ne $filter) {
1816                                                 next PATH;
1817                                         }
1818                                         my $sfx = substr($path, length($filter));
1819                                         if ($sfx !~ /^\/.*\.git$/) {
1820                                                 next PATH;
1821                                         }
1822                                         # is a fork, don't include it in
1823                                         # the list
1824                                         next PROJECT;
1825                                 }
1826                         }
1827                         if (check_export_ok("$projectroot/$path")) {
1828                                 my $pr = {
1829                                         path => $path,
1830                                         owner => to_utf8($owner),
1831                                 };
1832                                 push @list, $pr;
1833                                 (my $forks_path = $path) =~ s/\.git$//;
1834                                 $paths{$forks_path}++;
1835                         }
1836                 }
1837                 close $fd;
1838         }
1839         return @list;
1840 }
1841
1842 our $gitweb_project_owner = undef;
1843 sub git_get_project_list_from_file {
1844
1845         return if (defined $gitweb_project_owner);
1846
1847         $gitweb_project_owner = {};
1848         # read from file (url-encoded):
1849         # 'git%2Fgit.git Linus+Torvalds'
1850         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1851         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1852         if (-f $projects_list) {
1853                 open (my $fd , $projects_list);
1854                 while (my $line = <$fd>) {
1855                         chomp $line;
1856                         my ($pr, $ow) = split ' ', $line;
1857                         $pr = unescape($pr);
1858                         $ow = unescape($ow);
1859                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1860                 }
1861                 close $fd;
1862         }
1863 }
1864
1865 sub git_get_project_owner {
1866         my $project = shift;
1867         my $owner;
1868
1869         return undef unless $project;
1870         $git_dir = "$projectroot/$project";
1871
1872         if (!defined $gitweb_project_owner) {
1873                 git_get_project_list_from_file();
1874         }
1875
1876         if (exists $gitweb_project_owner->{$project}) {
1877                 $owner = $gitweb_project_owner->{$project};
1878         }
1879         if (!defined $owner){
1880                 $owner = git_get_project_config('owner');
1881         }
1882         if (!defined $owner) {
1883                 $owner = get_file_owner("$git_dir");
1884         }
1885
1886         return $owner;
1887 }
1888
1889 sub git_get_last_activity {
1890         my ($path) = @_;
1891         my $fd;
1892
1893         $git_dir = "$projectroot/$path";
1894         open($fd, "-|", git_cmd(), 'for-each-ref',
1895              '--format=%(committer)',
1896              '--sort=-committerdate',
1897              '--count=1',
1898              'refs/heads') or return;
1899         my $most_recent = <$fd>;
1900         close $fd or return;
1901         if (defined $most_recent &&
1902             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1903                 my $timestamp = $1;
1904                 my $age = time - $timestamp;
1905                 return ($age, age_string($age));
1906         }
1907         return (undef, undef);
1908 }
1909
1910 sub git_get_references {
1911         my $type = shift || "";
1912         my %refs;
1913         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1914         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1915         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1916                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1917                 or return;
1918
1919         while (my $line = <$fd>) {
1920                 chomp $line;
1921                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1922                         if (defined $refs{$1}) {
1923                                 push @{$refs{$1}}, $2;
1924                         } else {
1925                                 $refs{$1} = [ $2 ];
1926                         }
1927                 }
1928         }
1929         close $fd or return;
1930         return \%refs;
1931 }
1932
1933 sub git_get_rev_name_tags {
1934         my $hash = shift || return undef;
1935
1936         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1937                 or return;
1938         my $name_rev = <$fd>;
1939         close $fd;
1940
1941         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1942                 return $1;
1943         } else {
1944                 # catches also '$hash undefined' output
1945                 return undef;
1946         }
1947 }
1948
1949 ## ----------------------------------------------------------------------
1950 ## parse to hash functions
1951
1952 sub parse_date {
1953         my $epoch = shift;
1954         my $tz = shift || "-0000";
1955
1956         my %date;
1957         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1958         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1959         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1960         $date{'hour'} = $hour;
1961         $date{'minute'} = $min;
1962         $date{'mday'} = $mday;
1963         $date{'day'} = $days[$wday];
1964         $date{'month'} = $months[$mon];
1965         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1966                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1967         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1968                              $mday, $months[$mon], $hour ,$min;
1969         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1970                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1971
1972         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1973         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1974         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1975         $date{'hour_local'} = $hour;
1976         $date{'minute_local'} = $min;
1977         $date{'tz_local'} = $tz;
1978         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1979                                   1900+$year, $mon+1, $mday,
1980                                   $hour, $min, $sec, $tz);
1981         return %date;
1982 }
1983
1984 sub parse_tag {
1985         my $tag_id = shift;
1986         my %tag;
1987         my @comment;
1988
1989         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1990         $tag{'id'} = $tag_id;
1991         while (my $line = <$fd>) {
1992                 chomp $line;
1993                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1994                         $tag{'object'} = $1;
1995                 } elsif ($line =~ m/^type (.+)$/) {
1996                         $tag{'type'} = $1;
1997                 } elsif ($line =~ m/^tag (.+)$/) {
1998                         $tag{'name'} = $1;
1999                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2000                         $tag{'author'} = $1;
2001                         $tag{'epoch'} = $2;
2002                         $tag{'tz'} = $3;
2003                 } elsif ($line =~ m/--BEGIN/) {
2004                         push @comment, $line;
2005                         last;
2006                 } elsif ($line eq "") {
2007                         last;
2008                 }
2009         }
2010         push @comment, <$fd>;
2011         $tag{'comment'} = \@comment;
2012         close $fd or return;
2013         if (!defined $tag{'name'}) {
2014                 return
2015         };
2016         return %tag
2017 }
2018
2019 sub parse_commit_text {
2020         my ($commit_text, $withparents) = @_;
2021         my @commit_lines = split '\n', $commit_text;
2022         my %co;
2023
2024         pop @commit_lines; # Remove '\0'
2025
2026         if (! @commit_lines) {
2027                 return;
2028         }
2029
2030         my $header = shift @commit_lines;
2031         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2032                 return;
2033         }
2034         ($co{'id'}, my @parents) = split ' ', $header;
2035         while (my $line = shift @commit_lines) {
2036                 last if $line eq "\n";
2037                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2038                         $co{'tree'} = $1;
2039                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2040                         push @parents, $1;
2041                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2042                         $co{'author'} = $1;
2043                         $co{'author_epoch'} = $2;
2044                         $co{'author_tz'} = $3;
2045                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2046                                 $co{'author_name'}  = $1;
2047                                 $co{'author_email'} = $2;
2048                         } else {
2049                                 $co{'author_name'} = $co{'author'};
2050                         }
2051                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2052                         $co{'committer'} = $1;
2053                         $co{'committer_epoch'} = $2;
2054                         $co{'committer_tz'} = $3;
2055                         $co{'committer_name'} = $co{'committer'};
2056                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2057                                 $co{'committer_name'}  = $1;
2058                                 $co{'committer_email'} = $2;
2059                         } else {
2060                                 $co{'committer_name'} = $co{'committer'};
2061                         }
2062                 }
2063         }
2064         if (!defined $co{'tree'}) {
2065                 return;
2066         };
2067         $co{'parents'} = \@parents;
2068         $co{'parent'} = $parents[0];
2069
2070         foreach my $title (@commit_lines) {
2071                 $title =~ s/^    //;
2072                 if ($title ne "") {
2073                         $co{'title'} = chop_str($title, 80, 5);
2074                         # remove leading stuff of merges to make the interesting part visible
2075                         if (length($title) > 50) {
2076                                 $title =~ s/^Automatic //;
2077                                 $title =~ s/^merge (of|with) /Merge ... /i;
2078                                 if (length($title) > 50) {
2079                                         $title =~ s/(http|rsync):\/\///;
2080                                 }
2081                                 if (length($title) > 50) {
2082                                         $title =~ s/(master|www|rsync)\.//;
2083                                 }
2084                                 if (length($title) > 50) {
2085                                         $title =~ s/kernel.org:?//;
2086                                 }
2087                                 if (length($title) > 50) {
2088                                         $title =~ s/\/pub\/scm//;
2089                                 }
2090                         }
2091                         $co{'title_short'} = chop_str($title, 50, 5);
2092                         last;
2093                 }
2094         }
2095         if (! defined $co{'title'} || $co{'title'} eq "") {
2096                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2097         }
2098         # remove added spaces
2099         foreach my $line (@commit_lines) {
2100                 $line =~ s/^    //;
2101         }
2102         $co{'comment'} = \@commit_lines;
2103
2104         my $age = time - $co{'committer_epoch'};
2105         $co{'age'} = $age;
2106         $co{'age_string'} = age_string($age);
2107         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2108         if ($age > 60*60*24*7*2) {
2109                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2110                 $co{'age_string_age'} = $co{'age_string'};
2111         } else {
2112                 $co{'age_string_date'} = $co{'age_string'};
2113                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2114         }
2115         return %co;
2116 }
2117
2118 sub parse_commit {
2119         my ($commit_id) = @_;
2120         my %co;
2121
2122         local $/ = "\0";
2123
2124         open my $fd, "-|", git_cmd(), "rev-list",
2125                 "--parents",
2126                 "--header",
2127                 "--max-count=1",
2128                 $commit_id,
2129                 "--",
2130                 or die_error(500, "Open git-rev-list failed");
2131         %co = parse_commit_text(<$fd>, 1);
2132         close $fd;
2133
2134         return %co;
2135 }
2136
2137 sub parse_commits {
2138         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2139         my @cos;
2140
2141         $maxcount ||= 1;
2142         $skip ||= 0;
2143
2144         local $/ = "\0";
2145
2146         open my $fd, "-|", git_cmd(), "rev-list",
2147                 "--header",
2148                 @args,
2149                 ("--max-count=" . $maxcount),
2150                 ("--skip=" . $skip),
2151                 @extra_options,
2152                 $commit_id,
2153                 "--",
2154                 ($filename ? ($filename) : ())
2155                 or die_error(500, "Open git-rev-list failed");
2156         while (my $line = <$fd>) {
2157                 my %co = parse_commit_text($line);
2158                 push @cos, \%co;
2159         }
2160         close $fd;
2161
2162         return wantarray ? @cos : \@cos;
2163 }
2164
2165 # parse line of git-diff-tree "raw" output
2166 sub parse_difftree_raw_line {
2167         my $line = shift;
2168         my %res;
2169
2170         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2171         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2172         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2173                 $res{'from_mode'} = $1;
2174                 $res{'to_mode'} = $2;
2175                 $res{'from_id'} = $3;
2176                 $res{'to_id'} = $4;
2177                 $res{'status'} = $5;
2178                 $res{'similarity'} = $6;
2179                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2180                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2181                 } else {
2182                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2183                 }
2184         }
2185         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2186         # combined diff (for merge commit)
2187         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2188                 $res{'nparents'}  = length($1);
2189                 $res{'from_mode'} = [ split(' ', $2) ];
2190                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2191                 $res{'from_id'} = [ split(' ', $3) ];
2192                 $res{'to_id'} = pop @{$res{'from_id'}};
2193                 $res{'status'} = [ split('', $4) ];
2194                 $res{'to_file'} = unquote($5);
2195         }
2196         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2197         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2198                 $res{'commit'} = $1;
2199         }
2200
2201         return wantarray ? %res : \%res;
2202 }
2203
2204 # wrapper: return parsed line of git-diff-tree "raw" output
2205 # (the argument might be raw line, or parsed info)
2206 sub parsed_difftree_line {
2207         my $line_or_ref = shift;
2208
2209         if (ref($line_or_ref) eq "HASH") {
2210                 # pre-parsed (or generated by hand)
2211                 return $line_or_ref;
2212         } else {
2213                 return parse_difftree_raw_line($line_or_ref);
2214         }
2215 }
2216
2217 # parse line of git-ls-tree output
2218 sub parse_ls_tree_line ($;%) {
2219         my $line = shift;
2220         my %opts = @_;
2221         my %res;
2222
2223         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2224         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2225
2226         $res{'mode'} = $1;
2227         $res{'type'} = $2;
2228         $res{'hash'} = $3;
2229         if ($opts{'-z'}) {
2230                 $res{'name'} = $4;
2231         } else {
2232                 $res{'name'} = unquote($4);
2233         }
2234
2235         return wantarray ? %res : \%res;
2236 }
2237
2238 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2239 sub parse_from_to_diffinfo {
2240         my ($diffinfo, $from, $to, @parents) = @_;
2241
2242         if ($diffinfo->{'nparents'}) {
2243                 # combined diff
2244                 $from->{'file'} = [];
2245                 $from->{'href'} = [];
2246                 fill_from_file_info($diffinfo, @parents)
2247                         unless exists $diffinfo->{'from_file'};
2248                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2249                         $from->{'file'}[$i] =
2250                                 defined $diffinfo->{'from_file'}[$i] ?
2251                                         $diffinfo->{'from_file'}[$i] :
2252                                         $diffinfo->{'to_file'};
2253                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2254                                 $from->{'href'}[$i] = href(action=>"blob",
2255                                                            hash_base=>$parents[$i],
2256                                                            hash=>$diffinfo->{'from_id'}[$i],
2257                                                            file_name=>$from->{'file'}[$i]);
2258                         } else {
2259                                 $from->{'href'}[$i] = undef;
2260                         }
2261                 }
2262         } else {
2263                 # ordinary (not combined) diff
2264                 $from->{'file'} = $diffinfo->{'from_file'};
2265                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2266                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2267                                                hash=>$diffinfo->{'from_id'},
2268                                                file_name=>$from->{'file'});
2269                 } else {
2270                         delete $from->{'href'};
2271                 }
2272         }
2273
2274         $to->{'file'} = $diffinfo->{'to_file'};
2275         if (!is_deleted($diffinfo)) { # file exists in result
2276                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2277                                      hash=>$diffinfo->{'to_id'},
2278                                      file_name=>$to->{'file'});
2279         } else {
2280                 delete $to->{'href'};
2281         }
2282 }
2283
2284 ## ......................................................................
2285 ## parse to array of hashes functions
2286
2287 sub git_get_heads_list {
2288         my $limit = shift;
2289         my @headslist;
2290
2291         open my $fd, '-|', git_cmd(), 'for-each-ref',
2292                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2293                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2294                 'refs/heads'
2295                 or return;
2296         while (my $line = <$fd>) {
2297                 my %ref_item;
2298
2299                 chomp $line;
2300                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2301                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2302                 my ($committer, $epoch, $tz) =
2303                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2304                 $ref_item{'fullname'}  = $name;
2305                 $name =~ s!^refs/heads/!!;
2306
2307                 $ref_item{'name'}  = $name;
2308                 $ref_item{'id'}    = $hash;
2309                 $ref_item{'title'} = $title || '(no commit message)';
2310                 $ref_item{'epoch'} = $epoch;
2311                 if ($epoch) {
2312                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2313                 } else {
2314                         $ref_item{'age'} = "unknown";
2315                 }
2316
2317                 push @headslist, \%ref_item;
2318         }
2319         close $fd;
2320
2321         return wantarray ? @headslist : \@headslist;
2322 }
2323
2324 sub git_get_tags_list {
2325         my $limit = shift;
2326         my @tagslist;
2327
2328         open my $fd, '-|', git_cmd(), 'for-each-ref',
2329                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2330                 '--format=%(objectname) %(objecttype) %(refname) '.
2331                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2332                 'refs/tags'
2333                 or return;
2334         while (my $line = <$fd>) {
2335                 my %ref_item;
2336
2337                 chomp $line;
2338                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2339                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2340                 my ($creator, $epoch, $tz) =
2341                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2342                 $ref_item{'fullname'} = $name;
2343                 $name =~ s!^refs/tags/!!;
2344
2345                 $ref_item{'type'} = $type;
2346                 $ref_item{'id'} = $id;
2347                 $ref_item{'name'} = $name;
2348                 if ($type eq "tag") {
2349                         $ref_item{'subject'} = $title;
2350                         $ref_item{'reftype'} = $reftype;
2351                         $ref_item{'refid'}   = $refid;
2352                 } else {
2353                         $ref_item{'reftype'} = $type;
2354                         $ref_item{'refid'}   = $id;
2355                 }
2356
2357                 if ($type eq "tag" || $type eq "commit") {
2358                         $ref_item{'epoch'} = $epoch;
2359                         if ($epoch) {
2360                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2361                         } else {
2362                                 $ref_item{'age'} = "unknown";
2363                         }
2364                 }
2365
2366                 push @tagslist, \%ref_item;
2367         }
2368         close $fd;
2369
2370         return wantarray ? @tagslist : \@tagslist;
2371 }
2372
2373 ## ----------------------------------------------------------------------
2374 ## filesystem-related functions
2375
2376 sub get_file_owner {
2377         my $path = shift;
2378
2379         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2380         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2381         if (!defined $gcos) {
2382                 return undef;
2383         }
2384         my $owner = $gcos;
2385         $owner =~ s/[,;].*$//;
2386         return to_utf8($owner);
2387 }
2388
2389 ## ......................................................................
2390 ## mimetype related functions
2391
2392 sub mimetype_guess_file {
2393         my $filename = shift;
2394         my $mimemap = shift;
2395         -r $mimemap or return undef;
2396
2397         my %mimemap;
2398         open(MIME, $mimemap) or return undef;
2399         while (<MIME>) {
2400                 next if m/^#/; # skip comments
2401                 my ($mime, $exts) = split(/\t+/);
2402                 if (defined $exts) {
2403                         my @exts = split(/\s+/, $exts);
2404                         foreach my $ext (@exts) {
2405                                 $mimemap{$ext} = $mime;
2406                         }
2407                 }
2408         }
2409         close(MIME);
2410
2411         $filename =~ /\.([^.]*)$/;
2412         return $mimemap{$1};
2413 }
2414
2415 sub mimetype_guess {
2416         my $filename = shift;
2417         my $mime;
2418         $filename =~ /\./ or return undef;
2419
2420         if ($mimetypes_file) {
2421                 my $file = $mimetypes_file;
2422                 if ($file !~ m!^/!) { # if it is relative path
2423                         # it is relative to project
2424                         $file = "$projectroot/$project/$file";
2425                 }
2426                 $mime = mimetype_guess_file($filename, $file);
2427         }
2428         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2429         return $mime;
2430 }
2431
2432 sub blob_mimetype {
2433         my $fd = shift;
2434         my $filename = shift;
2435
2436         if ($filename) {
2437                 my $mime = mimetype_guess($filename);
2438                 $mime and return $mime;
2439         }
2440
2441         # just in case
2442         return $default_blob_plain_mimetype unless $fd;
2443
2444         if (-T $fd) {
2445                 return 'text/plain';
2446         } elsif (! $filename) {
2447                 return 'application/octet-stream';
2448         } elsif ($filename =~ m/\.png$/i) {
2449                 return 'image/png';
2450         } elsif ($filename =~ m/\.gif$/i) {
2451                 return 'image/gif';
2452         } elsif ($filename =~ m/\.jpe?g$/i) {
2453                 return 'image/jpeg';
2454         } else {
2455                 return 'application/octet-stream';
2456         }
2457 }
2458
2459 sub blob_contenttype {
2460         my ($fd, $file_name, $type) = @_;
2461
2462         $type ||= blob_mimetype($fd, $file_name);
2463         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2464                 $type .= "; charset=$default_text_plain_charset";
2465         }
2466
2467         return $type;
2468 }
2469
2470 ## ======================================================================
2471 ## functions printing HTML: header, footer, error page
2472
2473 sub git_header_html {
2474         my $status = shift || "200 OK";
2475         my $expires = shift;
2476
2477         my $title = "$site_name";
2478         if (defined $project) {
2479                 $title .= " - " . to_utf8($project);
2480                 if (defined $action) {
2481                         $title .= "/$action";
2482                         if (defined $file_name) {
2483                                 $title .= " - " . esc_path($file_name);
2484                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2485                                         $title .= "/";
2486                                 }
2487                         }
2488                 }
2489         }
2490         my $content_type;
2491         # require explicit support from the UA if we are to send the page as
2492         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2493         # we have to do this because MSIE sometimes globs '*/*', pretending to
2494         # support xhtml+xml but choking when it gets what it asked for.
2495         if (defined $cgi->http('HTTP_ACCEPT') &&
2496             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2497             $cgi->Accept('application/xhtml+xml') != 0) {
2498                 $content_type = 'application/xhtml+xml';
2499         } else {
2500                 $content_type = 'text/html';
2501         }
2502         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2503                            -status=> $status, -expires => $expires);
2504         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2505         print <<EOF;
2506 <?xml version="1.0" encoding="utf-8"?>
2507 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2508 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2509 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2510 <!-- git core binaries version $git_version -->
2511 <head>
2512 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2513 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2514 <meta name="robots" content="index, nofollow"/>
2515 <title>$title</title>
2516 EOF
2517 # print out each stylesheet that exist
2518         if (defined $stylesheet) {
2519 #provides backwards capability for those people who define style sheet in a config file
2520                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2521         } else {
2522                 foreach my $stylesheet (@stylesheets) {
2523                         next unless $stylesheet;
2524                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2525                 }
2526         }
2527         if (defined $project) {
2528                 my %href_params = get_feed_info();
2529                 if (!exists $href_params{'-title'}) {
2530                         $href_params{'-title'} = 'log';
2531                 }
2532
2533                 foreach my $format qw(RSS Atom) {
2534                         my $type = lc($format);
2535                         my %link_attr = (
2536                                 '-rel' => 'alternate',
2537                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2538                                 '-type' => "application/$type+xml"
2539                         );
2540
2541                         $href_params{'action'} = $type;
2542                         $link_attr{'-href'} = href(%href_params);
2543                         print "<link ".
2544                               "rel=\"$link_attr{'-rel'}\" ".
2545                               "title=\"$link_attr{'-title'}\" ".
2546                               "href=\"$link_attr{'-href'}\" ".
2547                               "type=\"$link_attr{'-type'}\" ".
2548                               "/>\n";
2549
2550                         $href_params{'extra_options'} = '--no-merges';
2551                         $link_attr{'-href'} = href(%href_params);
2552                         $link_attr{'-title'} .= ' (no merges)';
2553                         print "<link ".
2554                               "rel=\"$link_attr{'-rel'}\" ".
2555                               "title=\"$link_attr{'-title'}\" ".
2556                               "href=\"$link_attr{'-href'}\" ".
2557                               "type=\"$link_attr{'-type'}\" ".
2558                               "/>\n";
2559                 }
2560
2561         } else {
2562                 printf('<link rel="alternate" title="%s projects list" '.
2563                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2564                        $site_name, href(project=>undef, action=>"project_index"));
2565                 printf('<link rel="alternate" title="%s projects feeds" '.
2566                        'href="%s" type="text/x-opml" />'."\n",
2567                        $site_name, href(project=>undef, action=>"opml"));
2568         }
2569         if (defined $favicon) {
2570                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2571         }
2572
2573         print "</head>\n" .
2574               "<body>\n";
2575
2576         if (-f $site_header) {
2577                 open (my $fd, $site_header);
2578                 print <$fd>;
2579                 close $fd;
2580         }
2581
2582         print "<div class=\"page_header\">\n" .
2583               $cgi->a({-href => esc_url($logo_url),
2584                        -title => $logo_label},
2585                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2586         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2587         if (defined $project) {
2588                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2589                 if (defined $action) {
2590                         print " / $action";
2591                 }
2592                 print "\n";
2593         }
2594         print "</div>\n";
2595
2596         my ($have_search) = gitweb_check_feature('search');
2597         if (defined $project && $have_search) {
2598                 if (!defined $searchtext) {
2599                         $searchtext = "";
2600                 }
2601                 my $search_hash;
2602                 if (defined $hash_base) {
2603                         $search_hash = $hash_base;
2604                 } elsif (defined $hash) {
2605                         $search_hash = $hash;
2606                 } else {
2607                         $search_hash = "HEAD";
2608                 }
2609                 my $action = $my_uri;
2610                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2611                 if ($use_pathinfo) {
2612                         $action .= "/".esc_url($project);
2613                 }
2614                 print $cgi->startform(-method => "get", -action => $action) .
2615                       "<div class=\"search\">\n" .
2616                       (!$use_pathinfo &&
2617                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2618                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2619                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2620                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2621                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2622                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2623                       " search:\n",
2624                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2625                       "<span title=\"Extended regular expression\">" .
2626                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2627                                      -checked => $search_use_regexp) .
2628                       "</span>" .
2629                       "</div>" .
2630                       $cgi->end_form() . "\n";
2631         }
2632 }
2633
2634 sub git_footer_html {
2635         my $feed_class = 'rss_logo';
2636
2637         print "<div class=\"page_footer\">\n";
2638         if (defined $project) {
2639                 my $descr = git_get_project_description($project);
2640                 if (defined $descr) {
2641                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2642                 }
2643
2644                 my %href_params = get_feed_info();
2645                 if (!%href_params) {
2646                         $feed_class .= ' generic';
2647                 }
2648                 $href_params{'-title'} ||= 'log';
2649
2650                 foreach my $format qw(RSS Atom) {
2651                         $href_params{'action'} = lc($format);
2652                         print $cgi->a({-href => href(%href_params),
2653                                       -title => "$href_params{'-title'} $format feed",
2654                                       -class => $feed_class}, $format)."\n";
2655                 }
2656
2657         } else {
2658                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2659                               -class => $feed_class}, "OPML") . " ";
2660                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2661                               -class => $feed_class}, "TXT") . "\n";
2662         }
2663         print "</div>\n"; # class="page_footer"
2664
2665         if (-f $site_footer) {
2666                 open (my $fd, $site_footer);
2667                 print <$fd>;
2668                 close $fd;
2669         }
2670
2671         print "</body>\n" .
2672               "</html>";
2673 }
2674
2675 # die_error(<http_status_code>, <error_message>)
2676 # Example: die_error(404, 'Hash not found')
2677 # By convention, use the following status codes (as defined in RFC 2616):
2678 # 400: Invalid or missing CGI parameters, or
2679 #      requested object exists but has wrong type.
2680 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2681 #      this server or project.
2682 # 404: Requested object/revision/project doesn't exist.
2683 # 500: The server isn't configured properly, or
2684 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2685 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2686 sub die_error {
2687         my $status = shift || 500;
2688         my $error = shift || "Internal server error";
2689
2690         my %http_responses = (400 => '400 Bad Request',
2691                               403 => '403 Forbidden',
2692                               404 => '404 Not Found',
2693                               500 => '500 Internal Server Error');
2694         git_header_html($http_responses{$status});
2695         print <<EOF;
2696 <div class="page_body">
2697 <br /><br />
2698 $status - $error
2699 <br />
2700 </div>
2701 EOF
2702         git_footer_html();
2703         exit;
2704 }
2705
2706 ## ----------------------------------------------------------------------
2707 ## functions printing or outputting HTML: navigation
2708
2709 sub git_print_page_nav {
2710         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2711         $extra = '' if !defined $extra; # pager or formats
2712
2713         my @navs = qw(summary shortlog log commit commitdiff tree);
2714         if ($suppress) {
2715                 @navs = grep { $_ ne $suppress } @navs;
2716         }
2717
2718         my %arg = map { $_ => {action=>$_} } @navs;
2719         if (defined $head) {
2720                 for (qw(commit commitdiff)) {
2721                         $arg{$_}{'hash'} = $head;
2722                 }
2723                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2724                         for (qw(shortlog log)) {
2725                                 $arg{$_}{'hash'} = $head;
2726                         }
2727                 }
2728         }
2729         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2730         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2731
2732         print "<div class=\"page_nav\">\n" .
2733                 (join " | ",
2734                  map { $_ eq $current ?
2735                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2736                  } @navs);
2737         print "<br/>\n$extra<br/>\n" .
2738               "</div>\n";
2739 }
2740
2741 sub format_paging_nav {
2742         my ($action, $hash, $head, $page, $has_next_link) = @_;
2743         my $paging_nav;
2744
2745
2746         if ($hash ne $head || $page) {
2747                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2748         } else {
2749                 $paging_nav .= "HEAD";
2750         }
2751
2752         if ($page > 0) {
2753                 $paging_nav .= " &sdot; " .
2754                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2755                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2756         } else {
2757                 $paging_nav .= " &sdot; prev";
2758         }
2759
2760         if ($has_next_link) {
2761                 $paging_nav .= " &sdot; " .
2762                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2763                                  -accesskey => "n", -title => "Alt-n"}, "next");
2764         } else {
2765                 $paging_nav .= " &sdot; next";
2766         }
2767
2768         return $paging_nav;
2769 }
2770
2771 ## ......................................................................
2772 ## functions printing or outputting HTML: div
2773
2774 sub git_print_header_div {
2775         my ($action, $title, $hash, $hash_base) = @_;
2776         my %args = ();
2777
2778         $args{'action'} = $action;
2779         $args{'hash'} = $hash if $hash;
2780         $args{'hash_base'} = $hash_base if $hash_base;
2781
2782         print "<div class=\"header\">\n" .
2783               $cgi->a({-href => href(%args), -class => "title"},
2784               $title ? $title : $action) .
2785               "\n</div>\n";
2786 }
2787
2788 #sub git_print_authorship (\%) {
2789 sub git_print_authorship {
2790         my $co = shift;
2791
2792         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2793         print "<div class=\"author_date\">" .
2794               esc_html($co->{'author_name'}) .
2795               " [$ad{'rfc2822'}";
2796         if ($ad{'hour_local'} < 6) {
2797                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2798                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2799         } else {
2800                 printf(" (%02d:%02d %s)",
2801                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2802         }
2803         print "]</div>\n";
2804 }
2805
2806 sub git_print_page_path {
2807         my $name = shift;
2808         my $type = shift;
2809         my $hb = shift;
2810
2811
2812         print "<div class=\"page_path\">";
2813         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2814                       -title => 'tree root'}, to_utf8("[$project]"));
2815         print " / ";
2816         if (defined $name) {
2817                 my @dirname = split '/', $name;
2818                 my $basename = pop @dirname;
2819                 my $fullname = '';
2820
2821                 foreach my $dir (@dirname) {
2822                         $fullname .= ($fullname ? '/' : '') . $dir;
2823                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2824                                                      hash_base=>$hb),
2825                                       -title => $fullname}, esc_path($dir));
2826                         print " / ";
2827                 }
2828                 if (defined $type && $type eq 'blob') {
2829                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2830                                                      hash_base=>$hb),
2831                                       -title => $name}, esc_path($basename));
2832                 } elsif (defined $type && $type eq 'tree') {
2833                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2834                                                      hash_base=>$hb),
2835                                       -title => $name}, esc_path($basename));
2836                         print " / ";
2837                 } else {
2838                         print esc_path($basename);
2839                 }
2840         }
2841         print "<br/></div>\n";
2842 }
2843
2844 # sub git_print_log (\@;%) {
2845 sub git_print_log ($;%) {
2846         my $log = shift;
2847         my %opts = @_;
2848
2849         if ($opts{'-remove_title'}) {
2850                 # remove title, i.e. first line of log
2851                 shift @$log;
2852         }
2853         # remove leading empty lines
2854         while (defined $log->[0] && $log->[0] eq "") {
2855                 shift @$log;
2856         }
2857
2858         # print log
2859         my $signoff = 0;
2860         my $empty = 0;
2861         foreach my $line (@$log) {
2862                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2863                         $signoff = 1;
2864                         $empty = 0;
2865                         if (! $opts{'-remove_signoff'}) {
2866                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2867                                 next;
2868                         } else {
2869                                 # remove signoff lines
2870                                 next;
2871                         }
2872                 } else {
2873                         $signoff = 0;
2874                 }
2875
2876                 # print only one empty line
2877                 # do not print empty line after signoff
2878                 if ($line eq "") {
2879                         next if ($empty || $signoff);
2880                         $empty = 1;
2881                 } else {
2882                         $empty = 0;
2883                 }
2884
2885                 print format_log_line_html($line) . "<br/>\n";
2886         }
2887
2888         if ($opts{'-final_empty_line'}) {
2889                 # end with single empty line
2890                 print "<br/>\n" unless $empty;
2891         }
2892 }
2893
2894 # return link target (what link points to)
2895 sub git_get_link_target {
2896         my $hash = shift;
2897         my $link_target;
2898
2899         # read link
2900         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2901                 or return;
2902         {
2903                 local $/;
2904                 $link_target = <$fd>;
2905         }
2906         close $fd
2907                 or return;
2908
2909         return $link_target;
2910 }
2911
2912 # given link target, and the directory (basedir) the link is in,
2913 # return target of link relative to top directory (top tree);
2914 # return undef if it is not possible (including absolute links).
2915 sub normalize_link_target {
2916         my ($link_target, $basedir, $hash_base) = @_;
2917
2918         # we can normalize symlink target only if $hash_base is provided
2919         return unless $hash_base;
2920
2921         # absolute symlinks (beginning with '/') cannot be normalized
2922         return if (substr($link_target, 0, 1) eq '/');
2923
2924         # normalize link target to path from top (root) tree (dir)
2925         my $path;
2926         if ($basedir) {
2927                 $path = $basedir . '/' . $link_target;
2928         } else {
2929                 # we are in top (root) tree (dir)
2930                 $path = $link_target;
2931         }
2932
2933         # remove //, /./, and /../
2934         my @path_parts;
2935         foreach my $part (split('/', $path)) {
2936                 # discard '.' and ''
2937                 next if (!$part || $part eq '.');
2938                 # handle '..'
2939                 if ($part eq '..') {
2940                         if (@path_parts) {
2941                                 pop @path_parts;
2942                         } else {
2943                                 # link leads outside repository (outside top dir)
2944                                 return;
2945                         }
2946                 } else {
2947                         push @path_parts, $part;
2948                 }
2949         }
2950         $path = join('/', @path_parts);
2951
2952         return $path;
2953 }
2954
2955 # print tree entry (row of git_tree), but without encompassing <tr> element
2956 sub git_print_tree_entry {
2957         my ($t, $basedir, $hash_base, $have_blame) = @_;
2958
2959         my %base_key = ();
2960         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2961
2962         # The format of a table row is: mode list link.  Where mode is
2963         # the mode of the entry, list is the name of the entry, an href,
2964         # and link is the action links of the entry.
2965
2966         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2967         if ($t->{'type'} eq "blob") {
2968                 print "<td class=\"list\">" .
2969                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2970                                                file_name=>"$basedir$t->{'name'}", %base_key),
2971                                 -class => "list"}, esc_path($t->{'name'}));
2972                 if (S_ISLNK(oct $t->{'mode'})) {
2973                         my $link_target = git_get_link_target($t->{'hash'});
2974                         if ($link_target) {
2975                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2976                                 if (defined $norm_target) {
2977                                         print " -> " .
2978                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2979                                                                      file_name=>$norm_target),
2980                                                        -title => $norm_target}, esc_path($link_target));
2981                                 } else {
2982                                         print " -> " . esc_path($link_target);
2983                                 }
2984                         }
2985                 }
2986                 print "</td>\n";
2987                 print "<td class=\"link\">";
2988                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2989                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2990                               "blob");
2991                 if ($have_blame) {
2992                         print " | " .
2993                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2994                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2995                                       "blame");
2996                 }
2997                 if (defined $hash_base) {
2998                         print " | " .
2999                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3000                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3001                                       "history");
3002                 }
3003                 print " | " .
3004                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3005                                                file_name=>"$basedir$t->{'name'}")},
3006                                 "raw");
3007                 print "</td>\n";
3008
3009         } elsif ($t->{'type'} eq "tree") {
3010                 print "<td class=\"list\">";
3011                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3012                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3013                               esc_path($t->{'name'}));
3014                 print "</td>\n";
3015                 print "<td class=\"link\">";
3016                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3017                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3018                               "tree");
3019                 if (defined $hash_base) {
3020                         print " | " .
3021                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3022                                                      file_name=>"$basedir$t->{'name'}")},
3023                                       "history");
3024                 }
3025                 print "</td>\n";
3026         } else {
3027                 # unknown object: we can only present history for it
3028                 # (this includes 'commit' object, i.e. submodule support)
3029                 print "<td class=\"list\">" .
3030                       esc_path($t->{'name'}) .
3031                       "</td>\n";
3032                 print "<td class=\"link\">";
3033                 if (defined $hash_base) {
3034                         print $cgi->a({-href => href(action=>"history",
3035                                                      hash_base=>$hash_base,
3036                                                      file_name=>"$basedir$t->{'name'}")},
3037                                       "history");
3038                 }
3039                 print "</td>\n";
3040         }
3041 }
3042
3043 ## ......................................................................
3044 ## functions printing large fragments of HTML
3045
3046 # get pre-image filenames for merge (combined) diff
3047 sub fill_from_file_info {
3048         my ($diff, @parents) = @_;
3049
3050         $diff->{'from_file'} = [ ];
3051         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3052         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3053                 if ($diff->{'status'}[$i] eq 'R' ||
3054                     $diff->{'status'}[$i] eq 'C') {
3055                         $diff->{'from_file'}[$i] =
3056                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3057                 }
3058         }
3059
3060         return $diff;
3061 }
3062
3063 # is current raw difftree line of file deletion
3064 sub is_deleted {
3065         my $diffinfo = shift;
3066
3067         return $diffinfo->{'to_id'} eq ('0' x 40);
3068 }
3069
3070 # does patch correspond to [previous] difftree raw line
3071 # $diffinfo  - hashref of parsed raw diff format
3072 # $patchinfo - hashref of parsed patch diff format
3073 #              (the same keys as in $diffinfo)
3074 sub is_patch_split {
3075         my ($diffinfo, $patchinfo) = @_;
3076
3077         return defined $diffinfo && defined $patchinfo
3078                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3079 }
3080
3081
3082 sub git_difftree_body {
3083         my ($difftree, $hash, @parents) = @_;
3084         my ($parent) = $parents[0];
3085         my ($have_blame) = gitweb_check_feature('blame');
3086         print "<div class=\"list_head\">\n";
3087         if ($#{$difftree} > 10) {
3088                 print(($#{$difftree} + 1) . " files changed:\n");
3089         }
3090         print "</div>\n";
3091
3092         print "<table class=\"" .
3093               (@parents > 1 ? "combined " : "") .
3094               "diff_tree\">\n";
3095
3096         # header only for combined diff in 'commitdiff' view
3097         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3098         if ($has_header) {
3099                 # table header
3100                 print "<thead><tr>\n" .
3101                        "<th></th><th></th>\n"; # filename, patchN link
3102                 for (my $i = 0; $i < @parents; $i++) {
3103                         my $par = $parents[$i];
3104                         print "<th>" .
3105                               $cgi->a({-href => href(action=>"commitdiff",
3106                                                      hash=>$hash, hash_parent=>$par),
3107                                        -title => 'commitdiff to parent number ' .
3108                                                   ($i+1) . ': ' . substr($par,0,7)},
3109                                       $i+1) .
3110                               "&nbsp;</th>\n";
3111                 }
3112                 print "</tr></thead>\n<tbody>\n";
3113         }
3114
3115         my $alternate = 1;
3116         my $patchno = 0;
3117         foreach my $line (@{$difftree}) {
3118                 my $diff = parsed_difftree_line($line);
3119
3120                 if ($alternate) {
3121                         print "<tr class=\"dark\">\n";
3122                 } else {
3123                         print "<tr class=\"light\">\n";
3124                 }
3125                 $alternate ^= 1;
3126
3127                 if (exists $diff->{'nparents'}) { # combined diff
3128
3129                         fill_from_file_info($diff, @parents)
3130                                 unless exists $diff->{'from_file'};
3131
3132                         if (!is_deleted($diff)) {
3133                                 # file exists in the result (child) commit
3134                                 print "<td>" .
3135                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3136                                                              file_name=>$diff->{'to_file'},
3137                                                              hash_base=>$hash),
3138                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3139                                       "</td>\n";
3140                         } else {
3141                                 print "<td>" .
3142                                       esc_path($diff->{'to_file'}) .
3143                                       "</td>\n";
3144                         }
3145
3146                         if ($action eq 'commitdiff') {
3147                                 # link to patch
3148                                 $patchno++;
3149                                 print "<td class=\"link\">" .
3150                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3151                                       " | " .
3152                                       "</td>\n";
3153                         }
3154
3155                         my $has_history = 0;
3156                         my $not_deleted = 0;
3157                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3158                                 my $hash_parent = $parents[$i];
3159                                 my $from_hash = $diff->{'from_id'}[$i];
3160                                 my $from_path = $diff->{'from_file'}[$i];
3161                                 my $status = $diff->{'status'}[$i];
3162
3163                                 $has_history ||= ($status ne 'A');
3164                                 $not_deleted ||= ($status ne 'D');
3165
3166                                 if ($status eq 'A') {
3167                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3168                                 } elsif ($status eq 'D') {
3169                                         print "<td class=\"link\">" .
3170                                               $cgi->a({-href => href(action=>"blob",
3171                                                                      hash_base=>$hash,
3172                                                                      hash=>$from_hash,
3173                                                                      file_name=>$from_path)},
3174                                                       "blob" . ($i+1)) .
3175                                               " | </td>\n";
3176                                 } else {
3177                                         if ($diff->{'to_id'} eq $from_hash) {
3178                                                 print "<td class=\"link nochange\">";
3179                                         } else {
3180                                                 print "<td class=\"link\">";
3181                                         }
3182                                         print $cgi->a({-href => href(action=>"blobdiff",
3183                                                                      hash=>$diff->{'to_id'},
3184                                                                      hash_parent=>$from_hash,
3185                                                                      hash_base=>$hash,
3186                                                                      hash_parent_base=>$hash_parent,
3187                                                                      file_name=>$diff->{'to_file'},
3188                                                                      file_parent=>$from_path)},
3189                                                       "diff" . ($i+1)) .
3190                                               " | </td>\n";
3191                                 }
3192                         }
3193
3194                         print "<td class=\"link\">";
3195                         if ($not_deleted) {
3196                                 print $cgi->a({-href => href(action=>"blob",
3197                                                              hash=>$diff->{'to_id'},
3198                                                              file_name=>$diff->{'to_file'},
3199                                                              hash_base=>$hash)},
3200                                               "blob");
3201                                 print " | " if ($has_history);
3202                         }
3203                         if ($has_history) {
3204                                 print $cgi->a({-href => href(action=>"history",
3205                                                              file_name=>$diff->{'to_file'},
3206                                                              hash_base=>$hash)},
3207                                               "history");
3208                         }
3209                         print "</td>\n";
3210
3211                         print "</tr>\n";
3212                         next; # instead of 'else' clause, to avoid extra indent
3213                 }
3214                 # else ordinary diff
3215
3216                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3217                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3218                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3219                         $to_mode_oct = oct $diff->{'to_mode'};
3220                         if (S_ISREG($to_mode_oct)) { # only for regular file
3221                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3222                         }
3223                         $to_file_type = file_type($diff->{'to_mode'});
3224                 }
3225                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3226                         $from_mode_oct = oct $diff->{'from_mode'};
3227                         if (S_ISREG($to_mode_oct)) { # only for regular file
3228                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3229                         }
3230                         $from_file_type = file_type($diff->{'from_mode'});
3231                 }
3232
3233                 if ($diff->{'status'} eq "A") { # created
3234                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3235                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3236                         $mode_chng   .= "]</span>";
3237                         print "<td>";
3238                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3239                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3240                                       -class => "list"}, esc_path($diff->{'file'}));
3241                         print "</td>\n";
3242                         print "<td>$mode_chng</td>\n";
3243                         print "<td class=\"link\">";
3244                         if ($action eq 'commitdiff') {
3245                                 # link to patch
3246                                 $patchno++;
3247                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3248                                 print " | ";
3249                         }
3250                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3251                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3252                                       "blob");
3253                         print "</td>\n";
3254
3255                 } elsif ($diff->{'status'} eq "D") { # deleted
3256                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3257                         print "<td>";
3258                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3259                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3260                                        -class => "list"}, esc_path($diff->{'file'}));
3261                         print "</td>\n";
3262                         print "<td>$mode_chng</td>\n";
3263                         print "<td class=\"link\">";
3264                         if ($action eq 'commitdiff') {
3265                                 # link to patch
3266                                 $patchno++;
3267                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3268                                 print " | ";
3269                         }
3270                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3271                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3272                                       "blob") . " | ";
3273                         if ($have_blame) {
3274                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3275                                                              file_name=>$diff->{'file'})},
3276                                               "blame") . " | ";
3277                         }
3278                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3279                                                      file_name=>$diff->{'file'})},
3280                                       "history");
3281                         print "</td>\n";
3282
3283                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3284                         my $mode_chnge = "";
3285                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3286                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3287                                 if ($from_file_type ne $to_file_type) {
3288                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3289                                 }
3290                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3291                                         if ($from_mode_str && $to_mode_str) {
3292                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3293                                         } elsif ($to_mode_str) {
3294                                                 $mode_chnge .= " mode: $to_mode_str";
3295                                         }
3296                                 }
3297                                 $mode_chnge .= "]</span>\n";
3298                         }
3299                         print "<td>";
3300                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3301                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3302                                       -class => "list"}, esc_path($diff->{'file'}));
3303                         print "</td>\n";
3304                         print "<td>$mode_chnge</td>\n";
3305                         print "<td class=\"link\">";
3306                         if ($action eq 'commitdiff') {
3307                                 # link to patch
3308                                 $patchno++;
3309                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3310                                       " | ";
3311                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3312                                 # "commit" view and modified file (not onlu mode changed)
3313                                 print $cgi->a({-href => href(action=>"blobdiff",
3314                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3315                                                              hash_base=>$hash, hash_parent_base=>$parent,
3316                                                              file_name=>$diff->{'file'})},
3317                                               "diff") .
3318                                       " | ";
3319                         }
3320                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3321                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3322                                        "blob") . " | ";
3323                         if ($have_blame) {
3324                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3325                                                              file_name=>$diff->{'file'})},
3326                                               "blame") . " | ";
3327                         }
3328                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3329                                                      file_name=>$diff->{'file'})},
3330                                       "history");
3331                         print "</td>\n";
3332
3333                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3334                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3335                         my $nstatus = $status_name{$diff->{'status'}};
3336                         my $mode_chng = "";
3337                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3338                                 # mode also for directories, so we cannot use $to_mode_str
3339                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3340                         }
3341                         print "<td>" .
3342                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3343                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3344                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3345                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3346                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3347                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3348                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3349                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3350                               "<td class=\"link\">";
3351                         if ($action eq 'commitdiff') {
3352                                 # link to patch
3353                                 $patchno++;
3354                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3355                                       " | ";
3356                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3357                                 # "commit" view and modified file (not only pure rename or copy)
3358                                 print $cgi->a({-href => href(action=>"blobdiff",
3359                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3360                                                              hash_base=>$hash, hash_parent_base=>$parent,
3361                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3362                                               "diff") .
3363                                       " | ";
3364                         }
3365                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3366                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3367                                       "blob") . " | ";
3368                         if ($have_blame) {
3369                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3370                                                              file_name=>$diff->{'to_file'})},
3371                                               "blame") . " | ";
3372                         }
3373                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3374                                                     file_name=>$diff->{'to_file'})},
3375                                       "history");
3376                         print "</td>\n";
3377
3378                 } # we should not encounter Unmerged (U) or Unknown (X) status
3379                 print "</tr>\n";
3380         }
3381         print "</tbody>" if $has_header;
3382         print "</table>\n";
3383 }
3384
3385 sub git_patchset_body {
3386         my ($fd, $difftree, $hash, @hash_parents) = @_;
3387         my ($hash_parent) = $hash_parents[0];
3388
3389         my $is_combined = (@hash_parents > 1);
3390         my $patch_idx = 0;
3391         my $patch_number = 0;
3392         my $patch_line;
3393         my $diffinfo;
3394         my $to_name;
3395         my (%from, %to);
3396
3397         print "<div class=\"patchset\">\n";
3398
3399         # skip to first patch
3400         while ($patch_line = <$fd>) {
3401                 chomp $patch_line;
3402
3403                 last if ($patch_line =~ m/^diff /);
3404         }
3405
3406  PATCH:
3407         while ($patch_line) {
3408
3409                 # parse "git diff" header line
3410                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3411                         # $1 is from_name, which we do not use
3412                         $to_name = unquote($2);
3413                         $to_name =~ s!^b/!!;
3414                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3415                         # $1 is 'cc' or 'combined', which we do not use
3416                         $to_name = unquote($2);
3417                 } else {
3418                         $to_name = undef;
3419                 }
3420
3421                 # check if current patch belong to current raw line
3422                 # and parse raw git-diff line if needed
3423                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3424                         # this is continuation of a split patch
3425                         print "<div class=\"patch cont\">\n";
3426                 } else {
3427                         # advance raw git-diff output if needed
3428                         $patch_idx++ if defined $diffinfo;
3429
3430                         # read and prepare patch information
3431                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3432
3433                         # compact combined diff output can have some patches skipped
3434                         # find which patch (using pathname of result) we are at now;
3435                         if ($is_combined) {
3436                                 while ($to_name ne $diffinfo->{'to_file'}) {
3437                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3438                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3439                                               "</div>\n";  # class="patch"
3440
3441                                         $patch_idx++;
3442                                         $patch_number++;
3443
3444                                         last if $patch_idx > $#$difftree;
3445                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3446                                 }
3447                         }
3448
3449                         # modifies %from, %to hashes
3450                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3451
3452                         # this is first patch for raw difftree line with $patch_idx index
3453                         # we index @$difftree array from 0, but number patches from 1
3454                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3455                 }
3456
3457                 # git diff header
3458                 #assert($patch_line =~ m/^diff /) if DEBUG;
3459                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3460                 $patch_number++;
3461                 # print "git diff" header
3462                 print format_git_diff_header_line($patch_line, $diffinfo,
3463                                                   \%from, \%to);
3464
3465                 # print extended diff header
3466                 print "<div class=\"diff extended_header\">\n";
3467         EXTENDED_HEADER:
3468                 while ($patch_line = <$fd>) {
3469                         chomp $patch_line;
3470
3471                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3472
3473                         print format_extended_diff_header_line($patch_line, $diffinfo,
3474                                                                \%from, \%to);
3475                 }
3476                 print "</div>\n"; # class="diff extended_header"
3477
3478                 # from-file/to-file diff header
3479                 if (! $patch_line) {
3480                         print "</div>\n"; # class="patch"
3481                         last PATCH;
3482                 }
3483                 next PATCH if ($patch_line =~ m/^diff /);
3484                 #assert($patch_line =~ m/^---/) if DEBUG;
3485
3486                 my $last_patch_line = $patch_line;
3487                 $patch_line = <$fd>;
3488                 chomp $patch_line;
3489                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3490
3491                 print format_diff_from_to_header($last_patch_line, $patch_line,
3492                                                  $diffinfo, \%from, \%to,
3493                                                  @hash_parents);
3494
3495                 # the patch itself
3496         LINE:
3497                 while ($patch_line = <$fd>) {
3498                         chomp $patch_line;
3499
3500                         next PATCH if ($patch_line =~ m/^diff /);
3501
3502                         print format_diff_line($patch_line, \%from, \%to);
3503                 }
3504
3505         } continue {
3506                 print "</div>\n"; # class="patch"
3507         }
3508
3509         # for compact combined (--cc) format, with chunk and patch simpliciaction
3510         # patchset might be empty, but there might be unprocessed raw lines
3511         for (++$patch_idx if $patch_number > 0;
3512              $patch_idx < @$difftree;
3513              ++$patch_idx) {
3514                 # read and prepare patch information
3515                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3516
3517                 # generate anchor for "patch" links in difftree / whatchanged part
3518                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3519                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3520                       "</div>\n";  # class="patch"
3521
3522                 $patch_number++;
3523         }
3524
3525         if ($patch_number == 0) {
3526                 if (@hash_parents > 1) {
3527                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3528                 } else {
3529                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3530                 }
3531         }
3532
3533         print "</div>\n"; # class="patchset"
3534 }
3535
3536 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3537
3538 # fills project list info (age, description, owner, forks) for each
3539 # project in the list, removing invalid projects from returned list
3540 # NOTE: modifies $projlist, but does not remove entries from it
3541 sub fill_project_list_info {
3542         my ($projlist, $check_forks) = @_;
3543         my @projects;
3544
3545  PROJECT:
3546         foreach my $pr (@$projlist) {
3547                 my (@activity) = git_get_last_activity($pr->{'path'});
3548                 unless (@activity) {
3549                         next PROJECT;
3550                 }
3551                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3552                 if (!defined $pr->{'descr'}) {
3553                         my $descr = git_get_project_description($pr->{'path'}) || "";
3554                         $descr = to_utf8($descr);
3555                         $pr->{'descr_long'} = $descr;
3556                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3557                 }
3558                 if (!defined $pr->{'owner'}) {
3559                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3560                 }
3561                 if ($check_forks) {
3562                         my $pname = $pr->{'path'};
3563                         if (($pname =~ s/\.git$//) &&
3564                             ($pname !~ /\/$/) &&
3565                             (-d "$projectroot/$pname")) {
3566                                 $pr->{'forks'} = "-d $projectroot/$pname";
3567                         }       else {
3568                                 $pr->{'forks'} = 0;
3569                         }
3570                 }
3571                 push @projects, $pr;
3572         }
3573
3574         return @projects;
3575 }
3576
3577 # print 'sort by' <th> element, either sorting by $key if $name eq $order
3578 # (changing $list), or generating 'sort by $name' replay link otherwise
3579 sub print_sort_th {
3580         my ($str_sort, $name, $order, $key, $header, $list) = @_;
3581         $key    ||= $name;
3582         $header ||= ucfirst($name);
3583
3584         if ($order eq $name) {
3585                 if ($str_sort) {
3586                         @$list = sort {$a->{$key} cmp $b->{$key}} @$list;
3587                 } else {
3588                         @$list = sort {$a->{$key} <=> $b->{$key}} @$list;
3589                 }
3590                 print "<th>$header</th>\n";
3591         } else {
3592                 print "<th>" .
3593                       $cgi->a({-href => href(-replay=>1, order=>$name),
3594                                -class => "header"}, $header) .
3595                       "</th>\n";
3596         }
3597 }
3598
3599 sub print_sort_th_str {
3600         print_sort_th(1, @_);
3601 }
3602
3603 sub print_sort_th_num {
3604         print_sort_th(0, @_);
3605 }
3606
3607 sub git_project_list_body {
3608         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3609
3610         my ($check_forks) = gitweb_check_feature('forks');
3611         my @projects = fill_project_list_info($projlist, $check_forks);
3612
3613         $order ||= $default_projects_order;
3614         $from = 0 unless defined $from;
3615         $to = $#projects if (!defined $to || $#projects < $to);
3616
3617         print "<table class=\"project_list\">\n";
3618         unless ($no_header) {
3619                 print "<tr>\n";
3620                 if ($check_forks) {
3621                         print "<th></th>\n";
3622                 }
3623                 print_sort_th_str('project', $order, 'path',
3624                                   'Project', \@projects);
3625                 print_sort_th_str('descr', $order, 'descr_long',
3626                                   'Description', \@projects);
3627                 print_sort_th_str('owner', $order, 'owner',
3628                                   'Owner', \@projects);
3629                 print_sort_th_num('age', $order, 'age',
3630                                   'Last Change', \@projects);
3631                 print "<th></th>\n" . # for links
3632                       "</tr>\n";
3633         }
3634         my $alternate = 1;
3635         for (my $i = $from; $i <= $to; $i++) {
3636                 my $pr = $projects[$i];
3637                 if ($alternate) {
3638                         print "<tr class=\"dark\">\n";
3639                 } else {
3640                         print "<tr class=\"light\">\n";
3641                 }
3642                 $alternate ^= 1;
3643                 if ($check_forks) {
3644                         print "<td>";
3645                         if ($pr->{'forks'}) {
3646                                 print "<!-- $pr->{'forks'} -->\n";
3647                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3648                         }
3649                         print "</td>\n";
3650                 }
3651                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3652                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3653                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3654                                         -class => "list", -title => $pr->{'descr_long'}},
3655                                         esc_html($pr->{'descr'})) . "</td>\n" .
3656                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3657                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3658                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3659                       "<td class=\"link\">" .
3660                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3661                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3662                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3663                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3664                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3665                       "</td>\n" .
3666                       "</tr>\n";
3667         }
3668         if (defined $extra) {
3669                 print "<tr>\n";
3670                 if ($check_forks) {
3671                         print "<td></td>\n";
3672                 }
3673                 print "<td colspan=\"5\">$extra</td>\n" .
3674                       "</tr>\n";
3675         }
3676         print "</table>\n";
3677 }
3678
3679 sub git_shortlog_body {
3680         # uses global variable $project
3681         my ($commitlist, $from, $to, $refs, $extra) = @_;
3682
3683         $from = 0 unless defined $from;
3684         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3685
3686         print "<table class=\"shortlog\">\n";
3687         my $alternate = 1;
3688         for (my $i = $from; $i <= $to; $i++) {
3689                 my %co = %{$commitlist->[$i]};
3690                 my $commit = $co{'id'};
3691                 my $ref = format_ref_marker($refs, $commit);
3692                 if ($alternate) {
3693                         print "<tr class=\"dark\">\n";
3694                 } else {
3695                         print "<tr class=\"light\">\n";
3696                 }
3697                 $alternate ^= 1;
3698                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3699                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3700                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3701                       "<td><i>" . $author . "</i></td>\n" .
3702                       "<td>";
3703                 print format_subject_html($co{'title'}, $co{'title_short'},
3704                                           href(action=>"commit", hash=>$commit), $ref);
3705                 print "</td>\n" .
3706                       "<td class=\"link\">" .
3707                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3708                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3709                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3710                 my $snapshot_links = format_snapshot_links($commit);
3711                 if (defined $snapshot_links) {
3712                         print " | " . $snapshot_links;
3713                 }
3714                 print "</td>\n" .
3715                       "</tr>\n";
3716         }
3717         if (defined $extra) {
3718                 print "<tr>\n" .
3719                       "<td colspan=\"4\">$extra</td>\n" .
3720                       "</tr>\n";
3721         }
3722         print "</table>\n";
3723 }
3724
3725 sub git_history_body {
3726         # Warning: assumes constant type (blob or tree) during history
3727         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3728
3729         $from = 0 unless defined $from;
3730         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3731
3732         print "<table class=\"history\">\n";
3733         my $alternate = 1;
3734         for (my $i = $from; $i <= $to; $i++) {
3735                 my %co = %{$commitlist->[$i]};
3736                 if (!%co) {
3737                         next;
3738                 }
3739                 my $commit = $co{'id'};
3740
3741                 my $ref = format_ref_marker($refs, $commit);
3742
3743                 if ($alternate) {
3744                         print "<tr class=\"dark\">\n";
3745                 } else {
3746                         print "<tr class=\"light\">\n";
3747                 }
3748                 $alternate ^= 1;
3749         # shortlog uses      chop_str($co{'author_name'}, 10)
3750                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3751                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3752                       "<td><i>" . $author . "</i></td>\n" .
3753                       "<td>";
3754                 # originally git_history used chop_str($co{'title'}, 50)
3755                 print format_subject_html($co{'title'}, $co{'title_short'},
3756                                           href(action=>"commit", hash=>$commit), $ref);
3757                 print "</td>\n" .
3758                       "<td class=\"link\">" .
3759                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3760                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3761
3762                 if ($ftype eq 'blob') {
3763                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3764                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3765                         if (defined $blob_current && defined $blob_parent &&
3766                                         $blob_current ne $blob_parent) {
3767                                 print " | " .
3768                                         $cgi->a({-href => href(action=>"blobdiff",
3769                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3770                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3771                                                                file_name=>$file_name)},
3772                                                 "diff to current");
3773                         }
3774                 }
3775                 print "</td>\n" .
3776                       "</tr>\n";
3777         }
3778         if (defined $extra) {
3779                 print "<tr>\n" .
3780                       "<td colspan=\"4\">$extra</td>\n" .
3781                       "</tr>\n";
3782         }
3783         print "</table>\n";
3784 }
3785
3786 sub git_tags_body {
3787         # uses global variable $project
3788         my ($taglist, $from, $to, $extra) = @_;
3789         $from = 0 unless defined $from;
3790         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3791
3792         print "<table class=\"tags\">\n";
3793         my $alternate = 1;
3794         for (my $i = $from; $i <= $to; $i++) {
3795                 my $entry = $taglist->[$i];
3796                 my %tag = %$entry;
3797                 my $comment = $tag{'subject'};
3798                 my $comment_short;
3799                 if (defined $comment) {
3800                         $comment_short = chop_str($comment, 30, 5);
3801                 }
3802                 if ($alternate) {
3803                         print "<tr class=\"dark\">\n";
3804                 } else {
3805                         print "<tr class=\"light\">\n";
3806                 }
3807                 $alternate ^= 1;
3808                 if (defined $tag{'age'}) {
3809                         print "<td><i>$tag{'age'}</i></td>\n";
3810                 } else {
3811                         print "<td></td>\n";
3812                 }
3813                 print "<td>" .
3814                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3815                                -class => "list name"}, esc_html($tag{'name'})) .
3816                       "</td>\n" .
3817                       "<td>";
3818                 if (defined $comment) {
3819                         print format_subject_html($comment, $comment_short,
3820                                                   href(action=>"tag", hash=>$tag{'id'}));
3821                 }
3822                 print "</td>\n" .
3823                       "<td class=\"selflink\">";
3824                 if ($tag{'type'} eq "tag") {
3825                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3826                 } else {
3827                         print "&nbsp;";
3828                 }
3829                 print "</td>\n" .
3830                       "<td class=\"link\">" . " | " .
3831                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3832                 if ($tag{'reftype'} eq "commit") {
3833                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3834                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3835                 } elsif ($tag{'reftype'} eq "blob") {
3836                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3837                 }
3838                 print "</td>\n" .
3839                       "</tr>";
3840         }
3841         if (defined $extra) {
3842                 print "<tr>\n" .
3843                       "<td colspan=\"5\">$extra</td>\n" .
3844                       "</tr>\n";
3845         }
3846         print "</table>\n";
3847 }
3848
3849 sub git_heads_body {
3850         # uses global variable $project
3851         my ($headlist, $head, $from, $to, $extra) = @_;
3852         $from = 0 unless defined $from;
3853         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3854
3855         print "<table class=\"heads\">\n";
3856         my $alternate = 1;
3857         for (my $i = $from; $i <= $to; $i++) {
3858                 my $entry = $headlist->[$i];
3859                 my %ref = %$entry;
3860                 my $curr = $ref{'id'} eq $head;
3861                 if ($alternate) {
3862                         print "<tr class=\"dark\">\n";
3863                 } else {
3864                         print "<tr class=\"light\">\n";
3865                 }
3866                 $alternate ^= 1;
3867                 print "<td><i>$ref{'age'}</i></td>\n" .
3868                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3869                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3870                                -class => "list name"},esc_html($ref{'name'})) .
3871                       "</td>\n" .
3872                       "<td class=\"link\">" .
3873                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3874                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3875                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3876                       "</td>\n" .
3877                       "</tr>";
3878         }
3879         if (defined $extra) {
3880                 print "<tr>\n" .
3881                       "<td colspan=\"3\">$extra</td>\n" .
3882                       "</tr>\n";
3883         }
3884         print "</table>\n";
3885 }
3886
3887 sub git_search_grep_body {
3888         my ($commitlist, $from, $to, $extra) = @_;
3889         $from = 0 unless defined $from;
3890         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3891
3892         print "<table class=\"commit_search\">\n";
3893         my $alternate = 1;
3894         for (my $i = $from; $i <= $to; $i++) {
3895                 my %co = %{$commitlist->[$i]};
3896                 if (!%co) {
3897                         next;
3898                 }
3899                 my $commit = $co{'id'};
3900                 if ($alternate) {
3901                         print "<tr class=\"dark\">\n";
3902                 } else {
3903                         print "<tr class=\"light\">\n";
3904                 }
3905                 $alternate ^= 1;
3906                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3907                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3908                       "<td><i>" . $author . "</i></td>\n" .
3909                       "<td>" .
3910                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3911                                -class => "list subject"},
3912                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3913                 my $comment = $co{'comment'};
3914                 foreach my $line (@$comment) {
3915                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3916                                 my ($lead, $match, $trail) = ($1, $2, $3);
3917                                 $match = chop_str($match, 70, 5, 'center');
3918                                 my $contextlen = int((80 - length($match))/2);
3919                                 $contextlen = 30 if ($contextlen > 30);
3920                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3921                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3922
3923                                 $lead  = esc_html($lead);
3924                                 $match = esc_html($match);
3925                                 $trail = esc_html($trail);
3926
3927                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3928                         }
3929                 }
3930                 print "</td>\n" .
3931                       "<td class=\"link\">" .
3932                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3933                       " | " .
3934                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3935                       " | " .
3936                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3937                 print "</td>\n" .
3938                       "</tr>\n";
3939         }
3940         if (defined $extra) {
3941                 print "<tr>\n" .
3942                       "<td colspan=\"3\">$extra</td>\n" .
3943                       "</tr>\n";
3944         }
3945         print "</table>\n";
3946 }
3947
3948 ## ======================================================================
3949 ## ======================================================================
3950 ## actions
3951
3952 sub git_project_list {
3953         my $order = $cgi->param('o');
3954         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3955                 die_error(400, "Unknown order parameter");
3956         }
3957
3958         my @list = git_get_projects_list();
3959         if (!@list) {
3960                 die_error(404, "No projects found");
3961         }
3962
3963         git_header_html();
3964         if (-f $home_text) {
3965                 print "<div class=\"index_include\">\n";
3966                 open (my $fd, $home_text);
3967                 print <$fd>;
3968                 close $fd;
3969                 print "</div>\n";
3970         }
3971         git_project_list_body(\@list, $order);
3972         git_footer_html();
3973 }
3974
3975 sub git_forks {
3976         my $order = $cgi->param('o');
3977         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3978                 die_error(400, "Unknown order parameter");
3979         }
3980
3981         my @list = git_get_projects_list($project);
3982         if (!@list) {
3983                 die_error(404, "No forks found");
3984         }
3985
3986         git_header_html();
3987         git_print_page_nav('','');
3988         git_print_header_div('summary', "$project forks");
3989         git_project_list_body(\@list, $order);
3990         git_footer_html();
3991 }
3992
3993 sub git_project_index {
3994         my @projects = git_get_projects_list($project);
3995
3996         print $cgi->header(
3997                 -type => 'text/plain',
3998                 -charset => 'utf-8',
3999                 -content_disposition => 'inline; filename="index.aux"');
4000
4001         foreach my $pr (@projects) {
4002                 if (!exists $pr->{'owner'}) {
4003                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4004                 }
4005
4006                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4007                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4008                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4009                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4010                 $path  =~ s/ /\+/g;
4011                 $owner =~ s/ /\+/g;
4012
4013                 print "$path $owner\n";
4014         }
4015 }
4016
4017 sub git_summary {
4018         my $descr = git_get_project_description($project) || "none";
4019         my %co = parse_commit("HEAD");
4020         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4021         my $head = $co{'id'};
4022
4023         my $owner = git_get_project_owner($project);
4024
4025         my $refs = git_get_references();
4026         # These get_*_list functions return one more to allow us to see if
4027         # there are more ...
4028         my @taglist  = git_get_tags_list(16);
4029         my @headlist = git_get_heads_list(16);
4030         my @forklist;
4031         my ($check_forks) = gitweb_check_feature('forks');
4032
4033         if ($check_forks) {
4034                 @forklist = git_get_projects_list($project);
4035         }
4036
4037         git_header_html();
4038         git_print_page_nav('summary','', $head);
4039
4040         print "<div class=\"title\">&nbsp;</div>\n";
4041         print "<table class=\"projects_list\">\n" .
4042               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4043               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4044         if (defined $cd{'rfc2822'}) {
4045                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4046         }
4047
4048         # use per project git URL list in $projectroot/$project/cloneurl
4049         # or make project git URL from git base URL and project name
4050         my $url_tag = "URL";
4051         my @url_list = git_get_project_url_list($project);
4052         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4053         foreach my $git_url (@url_list) {
4054                 next unless $git_url;
4055                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4056                 $url_tag = "";
4057         }
4058         print "</table>\n";
4059
4060         if (-s "$projectroot/$project/README.html") {
4061                 if (open my $fd, "$projectroot/$project/README.html") {
4062                         print "<div class=\"title\">readme</div>\n" .
4063                               "<div class=\"readme\">\n";
4064                         print $_ while (<$fd>);
4065                         print "\n</div>\n"; # class="readme"
4066                         close $fd;
4067                 }
4068         }
4069
4070         # we need to request one more than 16 (0..15) to check if
4071         # those 16 are all
4072         my @commitlist = $head ? parse_commits($head, 17) : ();
4073         if (@commitlist) {
4074                 git_print_header_div('shortlog');
4075                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4076                                   $#commitlist <=  15 ? undef :
4077                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4078         }
4079
4080         if (@taglist) {
4081                 git_print_header_div('tags');
4082                 git_tags_body(\@taglist, 0, 15,
4083                               $#taglist <=  15 ? undef :
4084                               $cgi->a({-href => href(action=>"tags")}, "..."));
4085         }
4086
4087         if (@headlist) {
4088                 git_print_header_div('heads');
4089                 git_heads_body(\@headlist, $head, 0, 15,
4090                                $#headlist <= 15 ? undef :
4091                                $cgi->a({-href => href(action=>"heads")}, "..."));
4092         }
4093
4094         if (@forklist) {
4095                 git_print_header_div('forks');
4096                 git_project_list_body(\@forklist, undef, 0, 15,
4097                                       $#forklist <= 15 ? undef :
4098                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4099                                       'noheader');
4100         }
4101
4102         git_footer_html();
4103 }
4104
4105 sub git_tag {
4106         my $head = git_get_head_hash($project);
4107         git_header_html();
4108         git_print_page_nav('','', $head,undef,$head);
4109         my %tag = parse_tag($hash);
4110
4111         if (! %tag) {
4112                 die_error(404, "Unknown tag object");
4113         }
4114
4115         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4116         print "<div class=\"title_text\">\n" .
4117               "<table class=\"object_header\">\n" .
4118               "<tr>\n" .
4119               "<td>object</td>\n" .
4120               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4121                                $tag{'object'}) . "</td>\n" .
4122               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4123                                               $tag{'type'}) . "</td>\n" .
4124               "</tr>\n";
4125         if (defined($tag{'author'})) {
4126                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4127                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4128                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4129                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4130                         "</td></tr>\n";
4131         }
4132         print "</table>\n\n" .
4133               "</div>\n";
4134         print "<div class=\"page_body\">";
4135         my $comment = $tag{'comment'};
4136         foreach my $line (@$comment) {
4137                 chomp $line;
4138                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4139         }
4140         print "</div>\n";
4141         git_footer_html();
4142 }
4143
4144 sub git_blame {
4145         my $fd;
4146         my $ftype;
4147
4148         gitweb_check_feature('blame')
4149             or die_error(403, "Blame view not allowed");
4150
4151         die_error(400, "No file name given") unless $file_name;
4152         $hash_base ||= git_get_head_hash($project);
4153         die_error(404, "Couldn't find base commit") unless ($hash_base);
4154         my %co = parse_commit($hash_base)
4155                 or die_error(404, "Commit not found");
4156         if (!defined $hash) {
4157                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4158                         or die_error(404, "Error looking up file");
4159         }
4160         $ftype = git_get_type($hash);
4161         if ($ftype !~ "blob") {
4162                 die_error(400, "Object is not a blob");
4163         }
4164         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4165               $file_name, $hash_base)
4166                 or die_error(500, "Open git-blame failed");
4167         git_header_html();
4168         my $formats_nav =
4169                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4170                         "blob") .
4171                 " | " .
4172                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4173                         "history") .
4174                 " | " .
4175                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4176                         "HEAD");
4177         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4178         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4179         git_print_page_path($file_name, $ftype, $hash_base);
4180         my @rev_color = (qw(light2 dark2));
4181         my $num_colors = scalar(@rev_color);
4182         my $current_color = 0;
4183         my $last_rev;
4184         print <<HTML;
4185 <div class="page_body">
4186 <table class="blame">
4187 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4188 HTML
4189         my %metainfo = ();
4190         while (1) {
4191                 $_ = <$fd>;
4192                 last unless defined $_;
4193                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4194                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4195                 if (!exists $metainfo{$full_rev}) {
4196                         $metainfo{$full_rev} = {};
4197                 }
4198                 my $meta = $metainfo{$full_rev};
4199                 while (<$fd>) {
4200                         last if (s/^\t//);
4201                         if (/^(\S+) (.*)$/) {
4202                                 $meta->{$1} = $2;
4203                         }
4204                 }
4205                 my $data = $_;
4206                 chomp $data;
4207                 my $rev = substr($full_rev, 0, 8);
4208                 my $author = $meta->{'author'};
4209                 my %date = parse_date($meta->{'author-time'},
4210                                       $meta->{'author-tz'});
4211                 my $date = $date{'iso-tz'};
4212                 if ($group_size) {
4213                         $current_color = ++$current_color % $num_colors;
4214                 }
4215                 print "<tr class=\"$rev_color[$current_color]\">\n";
4216                 if ($group_size) {
4217                         print "<td class=\"sha1\"";
4218                         print " title=\"". esc_html($author) . ", $date\"";
4219                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4220                         print ">";
4221                         print $cgi->a({-href => href(action=>"commit",
4222                                                      hash=>$full_rev,
4223                                                      file_name=>$file_name)},
4224                                       esc_html($rev));
4225                         print "</td>\n";
4226                 }
4227                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4228                         or die_error(500, "Open git-rev-parse failed");
4229                 my $parent_commit = <$dd>;
4230                 close $dd;
4231                 chomp($parent_commit);
4232                 my $blamed = href(action => 'blame',
4233                                   file_name => $meta->{'filename'},
4234                                   hash_base => $parent_commit);
4235                 print "<td class=\"linenr\">";
4236                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4237                                 -id => "l$lineno",
4238                                 -class => "linenr" },
4239                               esc_html($lineno));
4240                 print "</td>";
4241                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4242                 print "</tr>\n";
4243         }
4244         print "</table>\n";
4245         print "</div>";
4246         close $fd
4247                 or print "Reading blob failed\n";
4248         git_footer_html();
4249 }
4250
4251 sub git_tags {
4252         my $head = git_get_head_hash($project);
4253         git_header_html();
4254         git_print_page_nav('','', $head,undef,$head);
4255         git_print_header_div('summary', $project);
4256
4257         my @tagslist = git_get_tags_list();
4258         if (@tagslist) {
4259                 git_tags_body(\@tagslist);
4260         }
4261         git_footer_html();
4262 }
4263
4264 sub git_heads {
4265         my $head = git_get_head_hash($project);
4266         git_header_html();
4267         git_print_page_nav('','', $head,undef,$head);
4268         git_print_header_div('summary', $project);
4269
4270         my @headslist = git_get_heads_list();
4271         if (@headslist) {
4272                 git_heads_body(\@headslist, $head);
4273         }
4274         git_footer_html();
4275 }
4276
4277 sub git_blob_plain {
4278         my $type = shift;
4279         my $expires;
4280
4281         if (!defined $hash) {
4282                 if (defined $file_name) {
4283                         my $base = $hash_base || git_get_head_hash($project);
4284                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4285                                 or die_error(404, "Cannot find file");
4286                 } else {
4287                         die_error(400, "No file name defined");
4288                 }
4289         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4290                 # blobs defined by non-textual hash id's can be cached
4291                 $expires = "+1d";
4292         }
4293
4294         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4295                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4296
4297         # content-type (can include charset)
4298         $type = blob_contenttype($fd, $file_name, $type);
4299
4300         # "save as" filename, even when no $file_name is given
4301         my $save_as = "$hash";
4302         if (defined $file_name) {
4303                 $save_as = $file_name;
4304         } elsif ($type =~ m/^text\//) {
4305                 $save_as .= '.txt';
4306         }
4307
4308         print $cgi->header(
4309                 -type => $type,
4310                 -expires => $expires,
4311                 -content_disposition => 'inline; filename="' . $save_as . '"');
4312         undef $/;
4313         binmode STDOUT, ':raw';
4314         print <$fd>;
4315         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4316         $/ = "\n";
4317         close $fd;
4318 }
4319
4320 sub git_blob {
4321         my $expires;
4322
4323         if (!defined $hash) {
4324                 if (defined $file_name) {
4325                         my $base = $hash_base || git_get_head_hash($project);
4326                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4327                                 or die_error(404, "Cannot find file");
4328                 } else {
4329                         die_error(400, "No file name defined");
4330                 }
4331         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4332                 # blobs defined by non-textual hash id's can be cached
4333                 $expires = "+1d";
4334         }
4335
4336         my ($have_blame) = gitweb_check_feature('blame');
4337         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4338                 or die_error(500, "Couldn't cat $file_name, $hash");
4339         my $mimetype = blob_mimetype($fd, $file_name);
4340         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4341                 close $fd;
4342                 return git_blob_plain($mimetype);
4343         }
4344         # we can have blame only for text/* mimetype
4345         $have_blame &&= ($mimetype =~ m!^text/!);
4346
4347         git_header_html(undef, $expires);
4348         my $formats_nav = '';
4349         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4350                 if (defined $file_name) {
4351                         if ($have_blame) {
4352                                 $formats_nav .=
4353                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4354                                                 "blame") .
4355                                         " | ";
4356                         }
4357                         $formats_nav .=
4358                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4359                                         "history") .
4360                                 " | " .
4361                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4362                                         "raw") .
4363                                 " | " .
4364                                 $cgi->a({-href => href(action=>"blob",
4365                                                        hash_base=>"HEAD", file_name=>$file_name)},
4366                                         "HEAD");
4367                 } else {
4368                         $formats_nav .=
4369                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4370                                         "raw");
4371                 }
4372                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4373                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4374         } else {
4375                 print "<div class=\"page_nav\">\n" .
4376                       "<br/><br/></div>\n" .
4377                       "<div class=\"title\">$hash</div>\n";
4378         }
4379         git_print_page_path($file_name, "blob", $hash_base);
4380         print "<div class=\"page_body\">\n";
4381         if ($mimetype =~ m!^image/!) {
4382                 print qq!<img type="$mimetype"!;
4383                 if ($file_name) {
4384                         print qq! alt="$file_name" title="$file_name"!;
4385                 }
4386                 print qq! src="! .
4387                       href(action=>"blob_plain", hash=>$hash,
4388                            hash_base=>$hash_base, file_name=>$file_name) .
4389                       qq!" />\n!;
4390         } else {
4391                 my $nr;
4392                 while (my $line = <$fd>) {
4393                         chomp $line;
4394                         $nr++;
4395                         $line = untabify($line);
4396                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4397                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4398                 }
4399         }
4400         close $fd
4401                 or print "Reading blob failed.\n";
4402         print "</div>";
4403         git_footer_html();
4404 }
4405
4406 sub git_tree {
4407         if (!defined $hash_base) {
4408                 $hash_base = "HEAD";
4409         }
4410         if (!defined $hash) {
4411                 if (defined $file_name) {
4412                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4413                 } else {
4414                         $hash = $hash_base;
4415                 }
4416         }
4417         $/ = "\0";
4418         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4419                 or die_error(500, "Open git-ls-tree failed");
4420         my @entries = map { chomp; $_ } <$fd>;
4421         close $fd or die_error(404, "Reading tree failed");
4422         $/ = "\n";
4423
4424         my $refs = git_get_references();
4425         my $ref = format_ref_marker($refs, $hash_base);
4426         git_header_html();
4427         my $basedir = '';
4428         my ($have_blame) = gitweb_check_feature('blame');
4429         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4430                 my @views_nav = ();
4431                 if (defined $file_name) {
4432                         push @views_nav,
4433                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4434                                         "history"),
4435                                 $cgi->a({-href => href(action=>"tree",
4436                                                        hash_base=>"HEAD", file_name=>$file_name)},
4437                                         "HEAD"),
4438                 }
4439                 my $snapshot_links = format_snapshot_links($hash);
4440                 if (defined $snapshot_links) {
4441                         # FIXME: Should be available when we have no hash base as well.
4442                         push @views_nav, $snapshot_links;
4443                 }
4444                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4445                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4446         } else {
4447                 undef $hash_base;
4448                 print "<div class=\"page_nav\">\n";
4449                 print "<br/><br/></div>\n";
4450                 print "<div class=\"title\">$hash</div>\n";
4451         }
4452         if (defined $file_name) {
4453                 $basedir = $file_name;
4454                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4455                         $basedir .= '/';
4456                 }
4457         }
4458         git_print_page_path($file_name, 'tree', $hash_base);
4459         print "<div class=\"page_body\">\n";
4460         print "<table class=\"tree\">\n";
4461         my $alternate = 1;
4462         # '..' (top directory) link if possible
4463         if (defined $hash_base &&
4464             defined $file_name && $file_name =~ m![^/]+$!) {
4465                 if ($alternate) {
4466                         print "<tr class=\"dark\">\n";
4467                 } else {
4468                         print "<tr class=\"light\">\n";
4469                 }
4470                 $alternate ^= 1;
4471
4472                 my $up = $file_name;
4473                 $up =~ s!/?[^/]+$!!;
4474                 undef $up unless $up;
4475                 # based on git_print_tree_entry
4476                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4477                 print '<td class="list">';
4478                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4479                                              file_name=>$up)},
4480                               "..");
4481                 print "</td>\n";
4482                 print "<td class=\"link\"></td>\n";
4483
4484                 print "</tr>\n";
4485         }
4486         foreach my $line (@entries) {
4487                 my %t = parse_ls_tree_line($line, -z => 1);
4488
4489                 if ($alternate) {
4490                         print "<tr class=\"dark\">\n";
4491                 } else {
4492                         print "<tr class=\"light\">\n";
4493                 }
4494                 $alternate ^= 1;
4495
4496                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4497
4498                 print "</tr>\n";
4499         }
4500         print "</table>\n" .
4501               "</div>";
4502         git_footer_html();
4503 }
4504
4505 sub git_snapshot {
4506         my @supported_fmts = gitweb_check_feature('snapshot');
4507         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4508
4509         my $format = $cgi->param('sf');
4510         if (!@supported_fmts) {
4511                 die_error(403, "Snapshots not allowed");
4512         }
4513         # default to first supported snapshot format
4514         $format ||= $supported_fmts[0];
4515         if ($format !~ m/^[a-z0-9]+$/) {
4516                 die_error(400, "Invalid snapshot format parameter");
4517         } elsif (!exists($known_snapshot_formats{$format})) {
4518                 die_error(400, "Unknown snapshot format");
4519         } elsif (!grep($_ eq $format, @supported_fmts)) {
4520                 die_error(403, "Unsupported snapshot format");
4521         }
4522
4523         if (!defined $hash) {
4524                 $hash = git_get_head_hash($project);
4525         }
4526
4527         my $name = $project;
4528         $name =~ s,([^/])/*\.git$,$1,;
4529         $name = basename($name);
4530         my $filename = to_utf8($name);
4531         $name =~ s/\047/\047\\\047\047/g;
4532         my $cmd;
4533         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4534         $cmd = quote_command(
4535                 git_cmd(), 'archive',
4536                 "--format=$known_snapshot_formats{$format}{'format'}",
4537                 "--prefix=$name/", $hash);
4538         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4539                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4540         }
4541
4542         print $cgi->header(
4543                 -type => $known_snapshot_formats{$format}{'type'},
4544                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4545                 -status => '200 OK');
4546
4547         open my $fd, "-|", $cmd
4548                 or die_error(500, "Execute git-archive failed");
4549         binmode STDOUT, ':raw';
4550         print <$fd>;
4551         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4552         close $fd;
4553 }
4554
4555 sub git_log {
4556         my $head = git_get_head_hash($project);
4557         if (!defined $hash) {
4558                 $hash = $head;
4559         }
4560         if (!defined $page) {
4561                 $page = 0;
4562         }
4563         my $refs = git_get_references();
4564
4565         my @commitlist = parse_commits($hash, 101, (100 * $page));
4566
4567         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4568
4569         git_header_html();
4570         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4571
4572         if (!@commitlist) {
4573                 my %co = parse_commit($hash);
4574
4575                 git_print_header_div('summary', $project);
4576                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4577         }
4578         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4579         for (my $i = 0; $i <= $to; $i++) {
4580                 my %co = %{$commitlist[$i]};
4581                 next if !%co;
4582                 my $commit = $co{'id'};
4583                 my $ref = format_ref_marker($refs, $commit);
4584                 my %ad = parse_date($co{'author_epoch'});
4585                 git_print_header_div('commit',
4586                                "<span class=\"age\">$co{'age_string'}</span>" .
4587                                esc_html($co{'title'}) . $ref,
4588                                $commit);
4589                 print "<div class=\"title_text\">\n" .
4590                       "<div class=\"log_link\">\n" .
4591                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4592                       " | " .
4593                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4594                       " | " .
4595                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4596                       "<br/>\n" .
4597                       "</div>\n" .
4598                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4599                       "</div>\n";
4600
4601                 print "<div class=\"log_body\">\n";
4602                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4603                 print "</div>\n";
4604         }
4605         if ($#commitlist >= 100) {
4606                 print "<div class=\"page_nav\">\n";
4607                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4608                                -accesskey => "n", -title => "Alt-n"}, "next");
4609                 print "</div>\n";
4610         }
4611         git_footer_html();
4612 }
4613
4614 sub git_commit {
4615         $hash ||= $hash_base || "HEAD";
4616         my %co = parse_commit($hash)
4617             or die_error(404, "Unknown commit object");
4618         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4619         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4620
4621         my $parent  = $co{'parent'};
4622         my $parents = $co{'parents'}; # listref
4623
4624         # we need to prepare $formats_nav before any parameter munging
4625         my $formats_nav;
4626         if (!defined $parent) {
4627                 # --root commitdiff
4628                 $formats_nav .= '(initial)';
4629         } elsif (@$parents == 1) {
4630                 # single parent commit
4631                 $formats_nav .=
4632                         '(parent: ' .
4633                         $cgi->a({-href => href(action=>"commit",
4634                                                hash=>$parent)},
4635                                 esc_html(substr($parent, 0, 7))) .
4636                         ')';
4637         } else {
4638                 # merge commit
4639                 $formats_nav .=
4640                         '(merge: ' .
4641                         join(' ', map {
4642                                 $cgi->a({-href => href(action=>"commit",
4643                                                        hash=>$_)},
4644                                         esc_html(substr($_, 0, 7)));
4645                         } @$parents ) .
4646                         ')';
4647         }
4648
4649         if (!defined $parent) {
4650                 $parent = "--root";
4651         }
4652         my @difftree;
4653         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4654                 @diff_opts,
4655                 (@$parents <= 1 ? $parent : '-c'),
4656                 $hash, "--"
4657                 or die_error(500, "Open git-diff-tree failed");
4658         @difftree = map { chomp; $_ } <$fd>;
4659         close $fd or die_error(404, "Reading git-diff-tree failed");
4660
4661         # non-textual hash id's can be cached
4662         my $expires;
4663         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4664                 $expires = "+1d";
4665         }
4666         my $refs = git_get_references();
4667         my $ref = format_ref_marker($refs, $co{'id'});
4668
4669         git_header_html(undef, $expires);
4670         git_print_page_nav('commit', '',
4671                            $hash, $co{'tree'}, $hash,
4672                            $formats_nav);
4673
4674         if (defined $co{'parent'}) {
4675                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4676         } else {
4677                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4678         }
4679         print "<div class=\"title_text\">\n" .
4680               "<table class=\"object_header\">\n";
4681         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4682               "<tr>" .
4683               "<td></td><td> $ad{'rfc2822'}";
4684         if ($ad{'hour_local'} < 6) {
4685                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4686                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4687         } else {
4688                 printf(" (%02d:%02d %s)",
4689                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4690         }
4691         print "</td>" .
4692               "</tr>\n";
4693         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4694         print "<tr><td></td><td> $cd{'rfc2822'}" .
4695               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4696               "</td></tr>\n";
4697         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4698         print "<tr>" .
4699               "<td>tree</td>" .
4700               "<td class=\"sha1\">" .
4701               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4702                        class => "list"}, $co{'tree'}) .
4703               "</td>" .
4704               "<td class=\"link\">" .
4705               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4706                       "tree");
4707         my $snapshot_links = format_snapshot_links($hash);
4708         if (defined $snapshot_links) {
4709                 print " | " . $snapshot_links;
4710         }
4711         print "</td>" .
4712               "</tr>\n";
4713
4714         foreach my $par (@$parents) {
4715                 print "<tr>" .
4716                       "<td>parent</td>" .
4717                       "<td class=\"sha1\">" .
4718                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4719                                class => "list"}, $par) .
4720                       "</td>" .
4721                       "<td class=\"link\">" .
4722                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4723                       " | " .
4724                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4725                       "</td>" .
4726                       "</tr>\n";
4727         }
4728         print "</table>".
4729               "</div>\n";
4730
4731         print "<div class=\"page_body\">\n";
4732         git_print_log($co{'comment'});
4733         print "</div>\n";
4734
4735         git_difftree_body(\@difftree, $hash, @$parents);
4736
4737         git_footer_html();
4738 }
4739
4740 sub git_object {
4741         # object is defined by:
4742         # - hash or hash_base alone
4743         # - hash_base and file_name
4744         my $type;
4745
4746         # - hash or hash_base alone
4747         if ($hash || ($hash_base && !defined $file_name)) {
4748                 my $object_id = $hash || $hash_base;
4749
4750                 open my $fd, "-|", quote_command(
4751                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4752                         or die_error(404, "Object does not exist");
4753                 $type = <$fd>;
4754                 chomp $type;
4755                 close $fd
4756                         or die_error(404, "Object does not exist");
4757
4758         # - hash_base and file_name
4759         } elsif ($hash_base && defined $file_name) {
4760                 $file_name =~ s,/+$,,;
4761
4762                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4763                         or die_error(404, "Base object does not exist");
4764
4765                 # here errors should not hapen
4766                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4767                         or die_error(500, "Open git-ls-tree failed");
4768                 my $line = <$fd>;
4769                 close $fd;
4770
4771                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4772                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4773                         die_error(404, "File or directory for given base does not exist");
4774                 }
4775                 $type = $2;
4776                 $hash = $3;
4777         } else {
4778                 die_error(400, "Not enough information to find object");
4779         }
4780
4781         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4782                                           hash=>$hash, hash_base=>$hash_base,
4783                                           file_name=>$file_name),
4784                              -status => '302 Found');
4785 }
4786
4787 sub git_blobdiff {
4788         my $format = shift || 'html';
4789
4790         my $fd;
4791         my @difftree;
4792         my %diffinfo;
4793         my $expires;
4794
4795         # preparing $fd and %diffinfo for git_patchset_body
4796         # new style URI
4797         if (defined $hash_base && defined $hash_parent_base) {
4798                 if (defined $file_name) {
4799                         # read raw output
4800                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4801                                 $hash_parent_base, $hash_base,
4802                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4803                                 or die_error(500, "Open git-diff-tree failed");
4804                         @difftree = map { chomp; $_ } <$fd>;
4805                         close $fd
4806                                 or die_error(404, "Reading git-diff-tree failed");
4807                         @difftree
4808                                 or die_error(404, "Blob diff not found");
4809
4810                 } elsif (defined $hash &&
4811                          $hash =~ /[0-9a-fA-F]{40}/) {
4812                         # try to find filename from $hash
4813
4814                         # read filtered raw output
4815                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4816                                 $hash_parent_base, $hash_base, "--"
4817                                 or die_error(500, "Open git-diff-tree failed");
4818                         @difftree =
4819                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4820                                 # $hash == to_id
4821                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4822                                 map { chomp; $_ } <$fd>;
4823                         close $fd
4824                                 or die_error(404, "Reading git-diff-tree failed");
4825                         @difftree
4826                                 or die_error(404, "Blob diff not found");
4827
4828                 } else {
4829                         die_error(400, "Missing one of the blob diff parameters");
4830                 }
4831
4832                 if (@difftree > 1) {
4833                         die_error(400, "Ambiguous blob diff specification");
4834                 }
4835
4836                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4837                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4838                 $file_name   ||= $diffinfo{'to_file'};
4839
4840                 $hash_parent ||= $diffinfo{'from_id'};
4841                 $hash        ||= $diffinfo{'to_id'};
4842
4843                 # non-textual hash id's can be cached
4844                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4845                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4846                         $expires = '+1d';
4847                 }
4848
4849                 # open patch output
4850                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4851                         '-p', ($format eq 'html' ? "--full-index" : ()),
4852                         $hash_parent_base, $hash_base,
4853                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4854                         or die_error(500, "Open git-diff-tree failed");
4855         }
4856
4857         # old/legacy style URI
4858         if (!%diffinfo && # if new style URI failed
4859             defined $hash && defined $hash_parent) {
4860                 # fake git-diff-tree raw output
4861                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4862                 $diffinfo{'from_id'} = $hash_parent;
4863                 $diffinfo{'to_id'}   = $hash;
4864                 if (defined $file_name) {
4865                         if (defined $file_parent) {
4866                                 $diffinfo{'status'} = '2';
4867                                 $diffinfo{'from_file'} = $file_parent;
4868                                 $diffinfo{'to_file'}   = $file_name;
4869                         } else { # assume not renamed
4870                                 $diffinfo{'status'} = '1';
4871                                 $diffinfo{'from_file'} = $file_name;
4872                                 $diffinfo{'to_file'}   = $file_name;
4873                         }
4874                 } else { # no filename given
4875                         $diffinfo{'status'} = '2';
4876                         $diffinfo{'from_file'} = $hash_parent;
4877                         $diffinfo{'to_file'}   = $hash;
4878                 }
4879
4880                 # non-textual hash id's can be cached
4881                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4882                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4883                         $expires = '+1d';
4884                 }
4885
4886                 # open patch output
4887                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4888                         '-p', ($format eq 'html' ? "--full-index" : ()),
4889                         $hash_parent, $hash, "--"
4890                         or die_error(500, "Open git-diff failed");
4891         } else  {
4892                 die_error(400, "Missing one of the blob diff parameters")
4893                         unless %diffinfo;
4894         }
4895
4896         # header
4897         if ($format eq 'html') {
4898                 my $formats_nav =
4899                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4900                                 "raw");
4901                 git_header_html(undef, $expires);
4902                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4903                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4904                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4905                 } else {
4906                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4907                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4908                 }
4909                 if (defined $file_name) {
4910                         git_print_page_path($file_name, "blob", $hash_base);
4911                 } else {
4912                         print "<div class=\"page_path\"></div>\n";
4913                 }
4914
4915         } elsif ($format eq 'plain') {
4916                 print $cgi->header(
4917                         -type => 'text/plain',
4918                         -charset => 'utf-8',
4919                         -expires => $expires,
4920                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4921
4922                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4923
4924         } else {
4925                 die_error(400, "Unknown blobdiff format");
4926         }
4927
4928         # patch
4929         if ($format eq 'html') {
4930                 print "<div class=\"page_body\">\n";
4931
4932                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4933                 close $fd;
4934
4935                 print "</div>\n"; # class="page_body"
4936                 git_footer_html();
4937
4938         } else {
4939                 while (my $line = <$fd>) {
4940                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4941                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4942
4943                         print $line;
4944
4945                         last if $line =~ m!^\+\+\+!;
4946                 }
4947                 local $/ = undef;
4948                 print <$fd>;
4949                 close $fd;
4950         }
4951 }
4952
4953 sub git_blobdiff_plain {
4954         git_blobdiff('plain');
4955 }
4956
4957 sub git_commitdiff {
4958         my $format = shift || 'html';
4959         $hash ||= $hash_base || "HEAD";
4960         my %co = parse_commit($hash)
4961             or die_error(404, "Unknown commit object");
4962
4963         # choose format for commitdiff for merge
4964         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4965                 $hash_parent = '--cc';
4966         }
4967         # we need to prepare $formats_nav before almost any parameter munging
4968         my $formats_nav;
4969         if ($format eq 'html') {
4970                 $formats_nav =
4971                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4972                                 "raw");
4973
4974                 if (defined $hash_parent &&
4975                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4976                         # commitdiff with two commits given
4977                         my $hash_parent_short = $hash_parent;
4978                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4979                                 $hash_parent_short = substr($hash_parent, 0, 7);
4980                         }
4981                         $formats_nav .=
4982                                 ' (from';
4983                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4984                                 if ($co{'parents'}[$i] eq $hash_parent) {
4985                                         $formats_nav .= ' parent ' . ($i+1);
4986                                         last;
4987                                 }
4988                         }
4989                         $formats_nav .= ': ' .
4990                                 $cgi->a({-href => href(action=>"commitdiff",
4991                                                        hash=>$hash_parent)},
4992                                         esc_html($hash_parent_short)) .
4993                                 ')';
4994                 } elsif (!$co{'parent'}) {
4995                         # --root commitdiff
4996                         $formats_nav .= ' (initial)';
4997                 } elsif (scalar @{$co{'parents'}} == 1) {
4998                         # single parent commit
4999                         $formats_nav .=
5000                                 ' (parent: ' .
5001                                 $cgi->a({-href => href(action=>"commitdiff",
5002                                                        hash=>$co{'parent'})},
5003                                         esc_html(substr($co{'parent'}, 0, 7))) .
5004                                 ')';
5005                 } else {
5006                         # merge commit
5007                         if ($hash_parent eq '--cc') {
5008                                 $formats_nav .= ' | ' .
5009                                         $cgi->a({-href => href(action=>"commitdiff",
5010                                                                hash=>$hash, hash_parent=>'-c')},
5011                                                 'combined');
5012                         } else { # $hash_parent eq '-c'
5013                                 $formats_nav .= ' | ' .
5014                                         $cgi->a({-href => href(action=>"commitdiff",
5015                                                                hash=>$hash, hash_parent=>'--cc')},
5016                                                 'compact');
5017                         }
5018                         $formats_nav .=
5019                                 ' (merge: ' .
5020                                 join(' ', map {
5021                                         $cgi->a({-href => href(action=>"commitdiff",
5022                                                                hash=>$_)},
5023                                                 esc_html(substr($_, 0, 7)));
5024                                 } @{$co{'parents'}} ) .
5025                                 ')';
5026                 }
5027         }
5028
5029         my $hash_parent_param = $hash_parent;
5030         if (!defined $hash_parent_param) {
5031                 # --cc for multiple parents, --root for parentless
5032                 $hash_parent_param =
5033                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5034         }
5035
5036         # read commitdiff
5037         my $fd;
5038         my @difftree;
5039         if ($format eq 'html') {
5040                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5041                         "--no-commit-id", "--patch-with-raw", "--full-index",
5042                         $hash_parent_param, $hash, "--"
5043                         or die_error(500, "Open git-diff-tree failed");
5044
5045                 while (my $line = <$fd>) {
5046                         chomp $line;
5047                         # empty line ends raw part of diff-tree output
5048                         last unless $line;
5049                         push @difftree, scalar parse_difftree_raw_line($line);
5050                 }
5051
5052         } elsif ($format eq 'plain') {
5053                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5054                         '-p', $hash_parent_param, $hash, "--"
5055                         or die_error(500, "Open git-diff-tree failed");
5056
5057         } else {
5058                 die_error(400, "Unknown commitdiff format");
5059         }
5060
5061         # non-textual hash id's can be cached
5062         my $expires;
5063         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5064                 $expires = "+1d";
5065         }
5066
5067         # write commit message
5068         if ($format eq 'html') {
5069                 my $refs = git_get_references();
5070                 my $ref = format_ref_marker($refs, $co{'id'});
5071
5072                 git_header_html(undef, $expires);
5073                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5074                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5075                 git_print_authorship(\%co);
5076                 print "<div class=\"page_body\">\n";
5077                 if (@{$co{'comment'}} > 1) {
5078                         print "<div class=\"log\">\n";
5079                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5080                         print "</div>\n"; # class="log"
5081                 }
5082
5083         } elsif ($format eq 'plain') {
5084                 my $refs = git_get_references("tags");
5085                 my $tagname = git_get_rev_name_tags($hash);
5086                 my $filename = basename($project) . "-$hash.patch";
5087
5088                 print $cgi->header(
5089                         -type => 'text/plain',
5090                         -charset => 'utf-8',
5091                         -expires => $expires,
5092                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5093                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5094                 print "From: " . to_utf8($co{'author'}) . "\n";
5095                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5096                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5097
5098                 print "X-Git-Tag: $tagname\n" if $tagname;
5099                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5100
5101                 foreach my $line (@{$co{'comment'}}) {
5102                         print to_utf8($line) . "\n";
5103                 }
5104                 print "---\n\n";
5105         }
5106
5107         # write patch
5108         if ($format eq 'html') {
5109                 my $use_parents = !defined $hash_parent ||
5110                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5111                 git_difftree_body(\@difftree, $hash,
5112                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5113                 print "<br/>\n";
5114
5115                 git_patchset_body($fd, \@difftree, $hash,
5116                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5117                 close $fd;
5118                 print "</div>\n"; # class="page_body"
5119                 git_footer_html();
5120
5121         } elsif ($format eq 'plain') {
5122                 local $/ = undef;
5123                 print <$fd>;
5124                 close $fd
5125                         or print "Reading git-diff-tree failed\n";
5126         }
5127 }
5128
5129 sub git_commitdiff_plain {
5130         git_commitdiff('plain');
5131 }
5132
5133 sub git_history {
5134         if (!defined $hash_base) {
5135                 $hash_base = git_get_head_hash($project);
5136         }
5137         if (!defined $page) {
5138                 $page = 0;
5139         }
5140         my $ftype;
5141         my %co = parse_commit($hash_base)
5142             or die_error(404, "Unknown commit object");
5143
5144         my $refs = git_get_references();
5145         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5146
5147         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5148                                        $file_name, "--full-history")
5149             or die_error(404, "No such file or directory on given branch");
5150
5151         if (!defined $hash && defined $file_name) {
5152                 # some commits could have deleted file in question,
5153                 # and not have it in tree, but one of them has to have it
5154                 for (my $i = 0; $i <= @commitlist; $i++) {
5155                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5156                         last if defined $hash;
5157                 }
5158         }
5159         if (defined $hash) {
5160                 $ftype = git_get_type($hash);
5161         }
5162         if (!defined $ftype) {
5163                 die_error(500, "Unknown type of object");
5164         }
5165
5166         my $paging_nav = '';
5167         if ($page > 0) {
5168                 $paging_nav .=
5169                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5170                                                file_name=>$file_name)},
5171                                 "first");
5172                 $paging_nav .= " &sdot; " .
5173                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5174                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5175         } else {
5176                 $paging_nav .= "first";
5177                 $paging_nav .= " &sdot; prev";
5178         }
5179         my $next_link = '';
5180         if ($#commitlist >= 100) {
5181                 $next_link =
5182                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5183                                  -accesskey => "n", -title => "Alt-n"}, "next");
5184                 $paging_nav .= " &sdot; $next_link";
5185         } else {
5186                 $paging_nav .= " &sdot; next";
5187         }
5188
5189         git_header_html();
5190         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5191         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5192         git_print_page_path($file_name, $ftype, $hash_base);
5193
5194         git_history_body(\@commitlist, 0, 99,
5195                          $refs, $hash_base, $ftype, $next_link);
5196
5197         git_footer_html();
5198 }
5199
5200 sub git_search {
5201         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5202         if (!defined $searchtext) {
5203                 die_error(400, "Text field is empty");
5204         }
5205         if (!defined $hash) {
5206                 $hash = git_get_head_hash($project);
5207         }
5208         my %co = parse_commit($hash);
5209         if (!%co) {
5210                 die_error(404, "Unknown commit object");
5211         }
5212         if (!defined $page) {
5213                 $page = 0;
5214         }
5215
5216         $searchtype ||= 'commit';
5217         if ($searchtype eq 'pickaxe') {
5218                 # pickaxe may take all resources of your box and run for several minutes
5219                 # with every query - so decide by yourself how public you make this feature
5220                 gitweb_check_feature('pickaxe')
5221                     or die_error(403, "Pickaxe is disabled");
5222         }
5223         if ($searchtype eq 'grep') {
5224                 gitweb_check_feature('grep')
5225                     or die_error(403, "Grep is disabled");
5226         }
5227
5228         git_header_html();
5229
5230         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5231                 my $greptype;
5232                 if ($searchtype eq 'commit') {
5233                         $greptype = "--grep=";
5234                 } elsif ($searchtype eq 'author') {
5235                         $greptype = "--author=";
5236                 } elsif ($searchtype eq 'committer') {
5237                         $greptype = "--committer=";
5238                 }
5239                 $greptype .= $searchtext;
5240                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5241                                                $greptype, '--regexp-ignore-case',
5242                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5243
5244                 my $paging_nav = '';
5245                 if ($page > 0) {
5246                         $paging_nav .=
5247                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5248                                                        searchtext=>$searchtext,
5249                                                        searchtype=>$searchtype)},
5250                                         "first");
5251                         $paging_nav .= " &sdot; " .
5252                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5253                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5254                 } else {
5255                         $paging_nav .= "first";
5256                         $paging_nav .= " &sdot; prev";
5257                 }
5258                 my $next_link = '';
5259                 if ($#commitlist >= 100) {
5260                         $next_link =
5261                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5262                                          -accesskey => "n", -title => "Alt-n"}, "next");
5263                         $paging_nav .= " &sdot; $next_link";
5264                 } else {
5265                         $paging_nav .= " &sdot; next";
5266                 }
5267
5268                 if ($#commitlist >= 100) {
5269                 }
5270
5271                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5272                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5273                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5274         }
5275
5276         if ($searchtype eq 'pickaxe') {
5277                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5278                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5279
5280                 print "<table class=\"pickaxe search\">\n";
5281                 my $alternate = 1;
5282                 $/ = "\n";
5283                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5284                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5285                         ($search_use_regexp ? '--pickaxe-regex' : ());
5286                 undef %co;
5287                 my @files;
5288                 while (my $line = <$fd>) {
5289                         chomp $line;
5290                         next unless $line;
5291
5292                         my %set = parse_difftree_raw_line($line);
5293                         if (defined $set{'commit'}) {
5294                                 # finish previous commit
5295                                 if (%co) {
5296                                         print "</td>\n" .
5297                                               "<td class=\"link\">" .
5298                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5299                                               " | " .
5300                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5301                                         print "</td>\n" .
5302                                               "</tr>\n";
5303                                 }
5304
5305                                 if ($alternate) {
5306                                         print "<tr class=\"dark\">\n";
5307                                 } else {
5308                                         print "<tr class=\"light\">\n";
5309                                 }
5310                                 $alternate ^= 1;
5311                                 %co = parse_commit($set{'commit'});
5312                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5313                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5314                                       "<td><i>$author</i></td>\n" .
5315                                       "<td>" .
5316                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5317                                               -class => "list subject"},
5318                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5319                         } elsif (defined $set{'to_id'}) {
5320                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5321
5322                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5323                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5324                                               -class => "list"},
5325                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5326                                       "<br/>\n";
5327                         }
5328                 }
5329                 close $fd;
5330
5331                 # finish last commit (warning: repetition!)
5332                 if (%co) {
5333                         print "</td>\n" .
5334                               "<td class=\"link\">" .
5335                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5336                               " | " .
5337                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5338                         print "</td>\n" .
5339                               "</tr>\n";
5340                 }
5341
5342                 print "</table>\n";
5343         }
5344
5345         if ($searchtype eq 'grep') {
5346                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5347                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5348
5349                 print "<table class=\"grep_search\">\n";
5350                 my $alternate = 1;
5351                 my $matches = 0;
5352                 $/ = "\n";
5353                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5354                         $search_use_regexp ? ('-E', '-i') : '-F',
5355                         $searchtext, $co{'tree'};
5356                 my $lastfile = '';
5357                 while (my $line = <$fd>) {
5358                         chomp $line;
5359                         my ($file, $lno, $ltext, $binary);
5360                         last if ($matches++ > 1000);
5361                         if ($line =~ /^Binary file (.+) matches$/) {
5362                                 $file = $1;
5363                                 $binary = 1;
5364                         } else {
5365                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5366                         }
5367                         if ($file ne $lastfile) {
5368                                 $lastfile and print "</td></tr>\n";
5369                                 if ($alternate++) {
5370                                         print "<tr class=\"dark\">\n";
5371                                 } else {
5372                                         print "<tr class=\"light\">\n";
5373                                 }
5374                                 print "<td class=\"list\">".
5375                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5376                                                                file_name=>"$file"),
5377                                                 -class => "list"}, esc_path($file));
5378                                 print "</td><td>\n";
5379                                 $lastfile = $file;
5380                         }
5381                         if ($binary) {
5382                                 print "<div class=\"binary\">Binary file</div>\n";
5383                         } else {
5384                                 $ltext = untabify($ltext);
5385                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5386                                         $ltext = esc_html($1, -nbsp=>1);
5387                                         $ltext .= '<span class="match">';
5388                                         $ltext .= esc_html($2, -nbsp=>1);
5389                                         $ltext .= '</span>';
5390                                         $ltext .= esc_html($3, -nbsp=>1);
5391                                 } else {
5392                                         $ltext = esc_html($ltext, -nbsp=>1);
5393                                 }
5394                                 print "<div class=\"pre\">" .
5395                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5396                                                                file_name=>"$file").'#l'.$lno,
5397                                                 -class => "linenr"}, sprintf('%4i', $lno))
5398                                         . ' ' .  $ltext . "</div>\n";
5399                         }
5400                 }
5401                 if ($lastfile) {
5402                         print "</td></tr>\n";
5403                         if ($matches > 1000) {
5404                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5405                         }
5406                 } else {
5407                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5408                 }
5409                 close $fd;
5410
5411                 print "</table>\n";
5412         }
5413         git_footer_html();
5414 }
5415
5416 sub git_search_help {
5417         git_header_html();
5418         git_print_page_nav('','', $hash,$hash,$hash);
5419         print <<EOT;
5420 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5421 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5422 the pattern entered is recognized as the POSIX extended
5423 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5424 insensitive).</p>
5425 <dl>
5426 <dt><b>commit</b></dt>
5427 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5428 EOT
5429         my ($have_grep) = gitweb_check_feature('grep');
5430         if ($have_grep) {
5431                 print <<EOT;
5432 <dt><b>grep</b></dt>
5433 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5434     a different one) are searched for the given pattern. On large trees, this search can take
5435 a while and put some strain on the server, so please use it with some consideration. Note that
5436 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5437 case-sensitive.</dd>
5438 EOT
5439         }
5440         print <<EOT;
5441 <dt><b>author</b></dt>
5442 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5443 <dt><b>committer</b></dt>
5444 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5445 EOT
5446         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5447         if ($have_pickaxe) {
5448                 print <<EOT;
5449 <dt><b>pickaxe</b></dt>
5450 <dd>All commits that caused the string to appear or disappear from any file (changes that
5451 added, removed or "modified" the string) will be listed. This search can take a while and
5452 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5453 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5454 EOT
5455         }
5456         print "</dl>\n";
5457         git_footer_html();
5458 }
5459
5460 sub git_shortlog {
5461         my $head = git_get_head_hash($project);
5462         if (!defined $hash) {
5463                 $hash = $head;
5464         }
5465         if (!defined $page) {
5466                 $page = 0;
5467         }
5468         my $refs = git_get_references();
5469
5470         my @commitlist = parse_commits($hash, 101, (100 * $page));
5471
5472         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5473         my $next_link = '';
5474         if ($#commitlist >= 100) {
5475                 $next_link =
5476                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5477                                  -accesskey => "n", -title => "Alt-n"}, "next");
5478         }
5479
5480         git_header_html();
5481         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5482         git_print_header_div('summary', $project);
5483
5484         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5485
5486         git_footer_html();
5487 }
5488
5489 ## ......................................................................
5490 ## feeds (RSS, Atom; OPML)
5491
5492 sub git_feed {
5493         my $format = shift || 'atom';
5494         my ($have_blame) = gitweb_check_feature('blame');
5495
5496         # Atom: http://www.atomenabled.org/developers/syndication/
5497         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5498         if ($format ne 'rss' && $format ne 'atom') {
5499                 die_error(400, "Unknown web feed format");
5500         }
5501
5502         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5503         my $head = $hash || 'HEAD';
5504         my @commitlist = parse_commits($head, 150, 0, $file_name);
5505
5506         my %latest_commit;
5507         my %latest_date;
5508         my $content_type = "application/$format+xml";
5509         if (defined $cgi->http('HTTP_ACCEPT') &&
5510                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5511                 # browser (feed reader) prefers text/xml
5512                 $content_type = 'text/xml';
5513         }
5514         if (defined($commitlist[0])) {
5515                 %latest_commit = %{$commitlist[0]};
5516                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5517                 print $cgi->header(
5518                         -type => $content_type,
5519                         -charset => 'utf-8',
5520                         -last_modified => $latest_date{'rfc2822'});
5521         } else {
5522                 print $cgi->header(
5523                         -type => $content_type,
5524                         -charset => 'utf-8');
5525         }
5526
5527         # Optimization: skip generating the body if client asks only
5528         # for Last-Modified date.
5529         return if ($cgi->request_method() eq 'HEAD');
5530
5531         # header variables
5532         my $title = "$site_name - $project/$action";
5533         my $feed_type = 'log';
5534         if (defined $hash) {
5535                 $title .= " - '$hash'";
5536                 $feed_type = 'branch log';
5537                 if (defined $file_name) {
5538                         $title .= " :: $file_name";
5539                         $feed_type = 'history';
5540                 }
5541         } elsif (defined $file_name) {
5542                 $title .= " - $file_name";
5543                 $feed_type = 'history';
5544         }
5545         $title .= " $feed_type";
5546         my $descr = git_get_project_description($project);
5547         if (defined $descr) {
5548                 $descr = esc_html($descr);
5549         } else {
5550                 $descr = "$project " .
5551                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5552                          " feed";
5553         }
5554         my $owner = git_get_project_owner($project);
5555         $owner = esc_html($owner);
5556
5557         #header
5558         my $alt_url;
5559         if (defined $file_name) {
5560                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5561         } elsif (defined $hash) {
5562                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5563         } else {
5564                 $alt_url = href(-full=>1, action=>"summary");
5565         }
5566         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5567         if ($format eq 'rss') {
5568                 print <<XML;
5569 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5570 <channel>
5571 XML
5572                 print "<title>$title</title>\n" .
5573                       "<link>$alt_url</link>\n" .
5574                       "<description>$descr</description>\n" .
5575                       "<language>en</language>\n";
5576         } elsif ($format eq 'atom') {
5577                 print <<XML;
5578 <feed xmlns="http://www.w3.org/2005/Atom">
5579 XML
5580                 print "<title>$title</title>\n" .
5581                       "<subtitle>$descr</subtitle>\n" .
5582                       '<link rel="alternate" type="text/html" href="' .
5583                       $alt_url . '" />' . "\n" .
5584                       '<link rel="self" type="' . $content_type . '" href="' .
5585                       $cgi->self_url() . '" />' . "\n" .
5586                       "<id>" . href(-full=>1) . "</id>\n" .
5587                       # use project owner for feed author
5588                       "<author><name>$owner</name></author>\n";
5589                 if (defined $favicon) {
5590                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5591                 }
5592                 if (defined $logo_url) {
5593                         # not twice as wide as tall: 72 x 27 pixels
5594                         print "<logo>" . esc_url($logo) . "</logo>\n";
5595                 }
5596                 if (! %latest_date) {
5597                         # dummy date to keep the feed valid until commits trickle in:
5598                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5599                 } else {
5600                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5601                 }
5602         }
5603
5604         # contents
5605         for (my $i = 0; $i <= $#commitlist; $i++) {
5606                 my %co = %{$commitlist[$i]};
5607                 my $commit = $co{'id'};
5608                 # we read 150, we always show 30 and the ones more recent than 48 hours
5609                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5610                         last;
5611                 }
5612                 my %cd = parse_date($co{'author_epoch'});
5613
5614                 # get list of changed files
5615                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5616                         $co{'parent'} || "--root",
5617                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5618                         or next;
5619                 my @difftree = map { chomp; $_ } <$fd>;
5620                 close $fd
5621                         or next;
5622
5623                 # print element (entry, item)
5624                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5625                 if ($format eq 'rss') {
5626                         print "<item>\n" .
5627                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5628                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5629                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5630                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5631                               "<link>$co_url</link>\n" .
5632                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5633                               "<content:encoded>" .
5634                               "<![CDATA[\n";
5635                 } elsif ($format eq 'atom') {
5636                         print "<entry>\n" .
5637                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5638                               "<updated>$cd{'iso-8601'}</updated>\n" .
5639                               "<author>\n" .
5640                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5641                         if ($co{'author_email'}) {
5642                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5643                         }
5644                         print "</author>\n" .
5645                               # use committer for contributor
5646                               "<contributor>\n" .
5647                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5648                         if ($co{'committer_email'}) {
5649                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5650                         }
5651                         print "</contributor>\n" .
5652                               "<published>$cd{'iso-8601'}</published>\n" .
5653                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5654                               "<id>$co_url</id>\n" .
5655                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5656                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5657                 }
5658                 my $comment = $co{'comment'};
5659                 print "<pre>\n";
5660                 foreach my $line (@$comment) {
5661                         $line = esc_html($line);
5662                         print "$line\n";
5663                 }
5664                 print "</pre><ul>\n";
5665                 foreach my $difftree_line (@difftree) {
5666                         my %difftree = parse_difftree_raw_line($difftree_line);
5667                         next if !$difftree{'from_id'};
5668
5669                         my $file = $difftree{'file'} || $difftree{'to_file'};
5670
5671                         print "<li>" .
5672                               "[" .
5673                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5674                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5675                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5676                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5677                                       -title => "diff"}, 'D');
5678                         if ($have_blame) {
5679                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5680                                                              file_name=>$file, hash_base=>$commit),
5681                                               -title => "blame"}, 'B');
5682                         }
5683                         # if this is not a feed of a file history
5684                         if (!defined $file_name || $file_name ne $file) {
5685                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5686                                                              file_name=>$file, hash=>$commit),
5687                                               -title => "history"}, 'H');
5688                         }
5689                         $file = esc_path($file);
5690                         print "] ".
5691                               "$file</li>\n";
5692                 }
5693                 if ($format eq 'rss') {
5694                         print "</ul>]]>\n" .
5695                               "</content:encoded>\n" .
5696                               "</item>\n";
5697                 } elsif ($format eq 'atom') {
5698                         print "</ul>\n</div>\n" .
5699                               "</content>\n" .
5700                               "</entry>\n";
5701                 }
5702         }
5703
5704         # end of feed
5705         if ($format eq 'rss') {
5706                 print "</channel>\n</rss>\n";
5707         }       elsif ($format eq 'atom') {
5708                 print "</feed>\n";
5709         }
5710 }
5711
5712 sub git_rss {
5713         git_feed('rss');
5714 }
5715
5716 sub git_atom {
5717         git_feed('atom');
5718 }
5719
5720 sub git_opml {
5721         my @list = git_get_projects_list();
5722
5723         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5724         print <<XML;
5725 <?xml version="1.0" encoding="utf-8"?>
5726 <opml version="1.0">
5727 <head>
5728   <title>$site_name OPML Export</title>
5729 </head>
5730 <body>
5731 <outline text="git RSS feeds">
5732 XML
5733
5734         foreach my $pr (@list) {
5735                 my %proj = %$pr;
5736                 my $head = git_get_head_hash($proj{'path'});
5737                 if (!defined $head) {
5738                         next;
5739                 }
5740                 $git_dir = "$projectroot/$proj{'path'}";
5741                 my %co = parse_commit($head);
5742                 if (!%co) {
5743                         next;
5744                 }
5745
5746                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5747                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5748                 my $html = "$my_url?p=$proj{'path'};a=summary";
5749                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5750         }
5751         print <<XML;
5752 </outline>
5753 </body>
5754 </opml>
5755 XML
5756 }