gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # target of the home link on top of all pages
  39 our $home_link = $my_uri || "/";
  40
  41 # string of the home link on top of all pages
  42 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  43
  44 # name of your site or organization to appear in page titles
  45 # replace this with something more descriptive for clearer bookmarks
  46 our $site_name = "++GITWEB_SITENAME++"
  47                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  48
  49 # filename of html text to include at top of each page
  50 our $site_header = "++GITWEB_SITE_HEADER++";
  51 # html text to include at home page
  52 our $home_text = "++GITWEB_HOMETEXT++";
  53 # filename of html text to include at bottom of each page
  54 our $site_footer = "++GITWEB_SITE_FOOTER++";
  55
  56 # URI of stylesheets
  57 our @stylesheets = ("++GITWEB_CSS++");
  58 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  59 our $stylesheet = undef;
  60 # URI of GIT logo (72x27 size)
  61 our $logo = "++GITWEB_LOGO++";
  62 # URI of GIT favicon, assumed to be image/png type
  63 our $favicon = "++GITWEB_FAVICON++";
  64
  65 # URI and label (title) of GIT logo link
  66 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  67 #our $logo_label = "git documentation";
  68 our $logo_url = "http://git.or.cz/";
  69 our $logo_label = "git homepage";
  70
  71 # source of projects list
  72 our $projects_list = "++GITWEB_LIST++";
  73
  74 # the width (in characters) of the projects list "Description" column
  75 our $projects_list_description_width = 25;
  76
  77 # default order of projects list
  78 # valid values are none, project, descr, owner, and age
  79 our $default_projects_order = "project";
  80
  81 # show repository only if this file exists
  82 # (only effective if this variable evaluates to true)
  83 our $export_ok = "++GITWEB_EXPORT_OK++";
  84
  85 # only allow viewing of repositories also shown on the overview page
  86 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  87
  88 # list of git base URLs used for URL to where fetch project from,
  89 # i.e. full URL is "$git_base_url/$project"
  90 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  91
  92 # default blob_plain mimetype and default charset for text/plain blob
  93 our $default_blob_plain_mimetype = 'text/plain';
  94 our $default_text_plain_charset  = undef;
  95
  96 # file to use for guessing MIME types before trying /etc/mime.types
  97 # (relative to the current git repository)
  98 our $mimetypes_file = undef;
  99
 100 # assume this charset if line contains non-UTF-8 characters;
 101 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 102 # for which encoding all byte sequences are valid, for example
 103 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 104 # could be even 'utf-8' for the old behavior)
 105 our $fallback_encoding = 'latin1';
 106
 107 # rename detection options for git-diff and git-diff-tree
 108 # - default is '-M', with the cost proportional to
 109 #   (number of removed files) * (number of new files).
 110 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 111 #   (number of changed files + number of removed files) * (number of new files)
 112 # - even more costly is '-C', '--find-copies-harder' with cost
 113 #   (number of files in the original tree) * (number of new files)
 114 # - one might want to include '-B' option, e.g. '-B', '-M'
 115 our @diff_opts = ('-M'); # taken from git_commit
 116
 117 # information about snapshot formats that gitweb is capable of serving
 118 our %known_snapshot_formats = (
 119         # name => {
 120         #       'display' => display name,
 121         #       'type' => mime type,
 122         #       'suffix' => filename suffix,
 123         #       'format' => --format for git-archive,
 124         #       'compressor' => [compressor command and arguments]
 125         #                       (array reference, optional)}
 126         #
 127         'tgz' => {
 128                 'display' => 'tar.gz',
 129                 'type' => 'application/x-gzip',
 130                 'suffix' => '.tar.gz',
 131                 'format' => 'tar',
 132                 'compressor' => ['gzip']},
 133
 134         'tbz2' => {
 135                 'display' => 'tar.bz2',
 136                 'type' => 'application/x-bzip2',
 137                 'suffix' => '.tar.bz2',
 138                 'format' => 'tar',
 139                 'compressor' => ['bzip2']},
 140
 141         'zip' => {
 142                 'display' => 'zip',
 143                 'type' => 'application/x-zip',
 144                 'suffix' => '.zip',
 145                 'format' => 'zip'},
 146 );
 147
 148 # Aliases so we understand old gitweb.snapshot values in repository
 149 # configuration.
 150 our %known_snapshot_format_aliases = (
 151         'gzip'  => 'tgz',
 152         'bzip2' => 'tbz2',
 153
 154         # backward compatibility: legacy gitweb config support
 155         'x-gzip' => undef, 'gz' => undef,
 156         'x-bzip2' => undef, 'bz2' => undef,
 157         'x-zip' => undef, '' => undef,
 158 );
 159
 160 # You define site-wide feature defaults here; override them with
 161 # $GITWEB_CONFIG as necessary.
 162 our %feature = (
 163         # feature => {
 164         #       'sub' => feature-sub (subroutine),
 165         #       'override' => allow-override (boolean),
 166         #       'default' => [ default options...] (array reference)}
 167         #
 168         # if feature is overridable (it means that allow-override has true value),
 169         # then feature-sub will be called with default options as parameters;
 170         # return value of feature-sub indicates if to enable specified feature
 171         #
 172         # if there is no 'sub' key (no feature-sub), then feature cannot be
 173         # overriden
 174         #
 175         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 176
 177         # Enable the 'blame' blob view, showing the last commit that modified
 178         # each line in the file. This can be very CPU-intensive.
 179
 180         # To enable system wide have in $GITWEB_CONFIG
 181         # $feature{'blame'}{'default'} = [1];
 182         # To have project specific config enable override in $GITWEB_CONFIG
 183         # $feature{'blame'}{'override'} = 1;
 184         # and in project config gitweb.blame = 0|1;
 185         'blame' => {
 186                 'sub' => \&feature_blame,
 187                 'override' => 0,
 188                 'default' => [0]},
 189
 190         # Enable the 'snapshot' link, providing a compressed archive of any
 191         # tree. This can potentially generate high traffic if you have large
 192         # project.
 193
 194         # Value is a list of formats defined in %known_snapshot_formats that
 195         # you wish to offer.
 196         # To disable system wide have in $GITWEB_CONFIG
 197         # $feature{'snapshot'}{'default'} = [];
 198         # To have project specific config enable override in $GITWEB_CONFIG
 199         # $feature{'snapshot'}{'override'} = 1;
 200         # and in project config, a comma-separated list of formats or "none"
 201         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 202         'snapshot' => {
 203                 'sub' => \&feature_snapshot,
 204                 'override' => 0,
 205                 'default' => ['tgz']},
 206
 207         # Enable text search, which will list the commits which match author,
 208         # committer or commit text to a given string.  Enabled by default.
 209         # Project specific override is not supported.
 210         'search' => {
 211                 'override' => 0,
 212                 'default' => [1]},
 213
 214         # Enable grep search, which will list the files in currently selected
 215         # tree containing the given string. Enabled by default. This can be
 216         # potentially CPU-intensive, of course.
 217
 218         # To enable system wide have in $GITWEB_CONFIG
 219         # $feature{'grep'}{'default'} = [1];
 220         # To have project specific config enable override in $GITWEB_CONFIG
 221         # $feature{'grep'}{'override'} = 1;
 222         # and in project config gitweb.grep = 0|1;
 223         'grep' => {
 224                 'override' => 0,
 225                 'default' => [1]},
 226
 227         # Enable the pickaxe search, which will list the commits that modified
 228         # a given string in a file. This can be practical and quite faster
 229         # alternative to 'blame', but still potentially CPU-intensive.
 230
 231         # To enable system wide have in $GITWEB_CONFIG
 232         # $feature{'pickaxe'}{'default'} = [1];
 233         # To have project specific config enable override in $GITWEB_CONFIG
 234         # $feature{'pickaxe'}{'override'} = 1;
 235         # and in project config gitweb.pickaxe = 0|1;
 236         'pickaxe' => {
 237                 'sub' => \&feature_pickaxe,
 238                 'override' => 0,
 239                 'default' => [1]},
 240
 241         # Make gitweb use an alternative format of the URLs which can be
 242         # more readable and natural-looking: project name is embedded
 243         # directly in the path and the query string contains other
 244         # auxiliary information. All gitweb installations recognize
 245         # URL in either format; this configures in which formats gitweb
 246         # generates links.
 247
 248         # To enable system wide have in $GITWEB_CONFIG
 249         # $feature{'pathinfo'}{'default'} = [1];
 250         # Project specific override is not supported.
 251
 252         # Note that you will need to change the default location of CSS,
 253         # favicon, logo and possibly other files to an absolute URL. Also,
 254         # if gitweb.cgi serves as your indexfile, you will need to force
 255         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 256         'pathinfo' => {
 257                 'override' => 0,
 258                 'default' => [0]},
 259
 260         # Make gitweb consider projects in project root subdirectories
 261         # to be forks of existing projects. Given project $projname.git,
 262         # projects matching $projname/*.git will not be shown in the main
 263         # projects list, instead a '+' mark will be added to $projname
 264         # there and a 'forks' view will be enabled for the project, listing
 265         # all the forks. If project list is taken from a file, forks have
 266         # to be listed after the main project.
 267
 268         # To enable system wide have in $GITWEB_CONFIG
 269         # $feature{'forks'}{'default'} = [1];
 270         # Project specific override is not supported.
 271         'forks' => {
 272                 'override' => 0,
 273                 'default' => [0]},
 274 );
 275
 276 sub gitweb_check_feature {
 277         my ($name) = @_;
 278         return unless exists $feature{$name};
 279         my ($sub, $override, @defaults) = (
 280                 $feature{$name}{'sub'},
 281                 $feature{$name}{'override'},
 282                 @{$feature{$name}{'default'}});
 283         if (!$override) { return @defaults; }
 284         if (!defined $sub) {
 285                 warn "feature $name is not overrideable";
 286                 return @defaults;
 287         }
 288         return $sub->(@defaults);
 289 }
 290
 291 sub feature_blame {
 292         my ($val) = git_get_project_config('blame', '--bool');
 293
 294         if ($val eq 'true') {
 295                 return 1;
 296         } elsif ($val eq 'false') {
 297                 return 0;
 298         }
 299
 300         return $_[0];
 301 }
 302
 303 sub feature_snapshot {
 304         my (@fmts) = @_;
 305
 306         my ($val) = git_get_project_config('snapshot');
 307
 308         if ($val) {
 309                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 310         }
 311
 312         return @fmts;
 313 }
 314
 315 sub feature_grep {
 316         my ($val) = git_get_project_config('grep', '--bool');
 317
 318         if ($val eq 'true') {
 319                 return (1);
 320         } elsif ($val eq 'false') {
 321                 return (0);
 322         }
 323
 324         return ($_[0]);
 325 }
 326
 327 sub feature_pickaxe {
 328         my ($val) = git_get_project_config('pickaxe', '--bool');
 329
 330         if ($val eq 'true') {
 331                 return (1);
 332         } elsif ($val eq 'false') {
 333                 return (0);
 334         }
 335
 336         return ($_[0]);
 337 }
 338
 339 # checking HEAD file with -e is fragile if the repository was
 340 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 341 # and then pruned.
 342 sub check_head_link {
 343         my ($dir) = @_;
 344         my $headfile = "$dir/HEAD";
 345         return ((-e $headfile) ||
 346                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 347 }
 348
 349 sub check_export_ok {
 350         my ($dir) = @_;
 351         return (check_head_link($dir) &&
 352                 (!$export_ok || -e "$dir/$export_ok"));
 353 }
 354
 355 # process alternate names for backward compatibility
 356 # filter out unsupported (unknown) snapshot formats
 357 sub filter_snapshot_fmts {
 358         my @fmts = @_;
 359
 360         @fmts = map {
 361                 exists $known_snapshot_format_aliases{$_} ?
 362                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 363         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 364
 365 }
 366
 367 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 368 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 369
 370 # version of the core git binary
 371 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 372
 373 $projects_list ||= $projectroot;
 374
 375 # ======================================================================
 376 # input validation and dispatch
 377 our $action = $cgi->param('a');
 378 if (defined $action) {
 379         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 380                 die_error(undef, "Invalid action parameter");
 381         }
 382 }
 383
 384 # parameters which are pathnames
 385 our $project = $cgi->param('p');
 386 if (defined $project) {
 387         if (!validate_pathname($project) ||
 388             !(-d "$projectroot/$project") ||
 389             !check_head_link("$projectroot/$project") ||
 390             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 391             ($strict_export && !project_in_list($project))) {
 392                 undef $project;
 393                 die_error(undef, "No such project");
 394         }
 395 }
 396
 397 our $file_name = $cgi->param('f');
 398 if (defined $file_name) {
 399         if (!validate_pathname($file_name)) {
 400                 die_error(undef, "Invalid file parameter");
 401         }
 402 }
 403
 404 our $file_parent = $cgi->param('fp');
 405 if (defined $file_parent) {
 406         if (!validate_pathname($file_parent)) {
 407                 die_error(undef, "Invalid file parent parameter");
 408         }
 409 }
 410
 411 # parameters which are refnames
 412 our $hash = $cgi->param('h');
 413 if (defined $hash) {
 414         if (!validate_refname($hash)) {
 415                 die_error(undef, "Invalid hash parameter");
 416         }
 417 }
 418
 419 our $hash_parent = $cgi->param('hp');
 420 if (defined $hash_parent) {
 421         if (!validate_refname($hash_parent)) {
 422                 die_error(undef, "Invalid hash parent parameter");
 423         }
 424 }
 425
 426 our $hash_base = $cgi->param('hb');
 427 if (defined $hash_base) {
 428         if (!validate_refname($hash_base)) {
 429                 die_error(undef, "Invalid hash base parameter");
 430         }
 431 }
 432
 433 my %allowed_options = (
 434         "--no-merges" => [ qw(rss atom log shortlog history) ],
 435 );
 436
 437 our @extra_options = $cgi->param('opt');
 438 if (defined @extra_options) {
 439         foreach my $opt (@extra_options) {
 440                 if (not exists $allowed_options{$opt}) {
 441                         die_error(undef, "Invalid option parameter");
 442                 }
 443                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 444                         die_error(undef, "Invalid option parameter for this action");
 445                 }
 446         }
 447 }
 448
 449 our $hash_parent_base = $cgi->param('hpb');
 450 if (defined $hash_parent_base) {
 451         if (!validate_refname($hash_parent_base)) {
 452                 die_error(undef, "Invalid hash parent base parameter");
 453         }
 454 }
 455
 456 # other parameters
 457 our $page = $cgi->param('pg');
 458 if (defined $page) {
 459         if ($page =~ m/[^0-9]/) {
 460                 die_error(undef, "Invalid page parameter");
 461         }
 462 }
 463
 464 our $searchtype = $cgi->param('st');
 465 if (defined $searchtype) {
 466         if ($searchtype =~ m/[^a-z]/) {
 467                 die_error(undef, "Invalid searchtype parameter");
 468         }
 469 }
 470
 471 our $searchtext = $cgi->param('s');
 472 our $search_regexp;
 473 if (defined $searchtext) {
 474         if (length($searchtext) < 2) {
 475                 die_error(undef, "At least two characters are required for search parameter");
 476         }
 477         $search_regexp = quotemeta $searchtext;
 478 }
 479
 480 # now read PATH_INFO and use it as alternative to parameters
 481 sub evaluate_path_info {
 482         return if defined $project;
 483         my $path_info = $ENV{"PATH_INFO"};
 484         return if !$path_info;
 485         $path_info =~ s,^/+,,;
 486         return if !$path_info;
 487         # find which part of PATH_INFO is project
 488         $project = $path_info;
 489         $project =~ s,/+$,,;
 490         while ($project && !check_head_link("$projectroot/$project")) {
 491                 $project =~ s,/*[^/]*$,,;
 492         }
 493         # validate project
 494         $project = validate_pathname($project);
 495         if (!$project ||
 496             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 497             ($strict_export && !project_in_list($project))) {
 498                 undef $project;
 499                 return;
 500         }
 501         # do not change any parameters if an action is given using the query string
 502         return if $action;
 503         $path_info =~ s,^$project/*,,;
 504         my ($refname, $pathname) = split(/:/, $path_info, 2);
 505         if (defined $pathname) {
 506                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 507                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 508                 $pathname =~ s,^/+,,;
 509                 if (!$pathname || substr($pathname, -1) eq "/") {
 510                         $action  ||= "tree";
 511                         $pathname =~ s,/$,,;
 512                 } else {
 513                         $action  ||= "blob_plain";
 514                 }
 515                 $hash_base ||= validate_refname($refname);
 516                 $file_name ||= validate_pathname($pathname);
 517         } elsif (defined $refname) {
 518                 # we got "project.git/branch"
 519                 $action ||= "shortlog";
 520                 $hash   ||= validate_refname($refname);
 521         }
 522 }
 523 evaluate_path_info();
 524
 525 # path to the current git repository
 526 our $git_dir;
 527 $git_dir = "$projectroot/$project" if $project;
 528
 529 # dispatch
 530 my %actions = (
 531         "blame" => \&git_blame2,
 532         "blobdiff" => \&git_blobdiff,
 533         "blobdiff_plain" => \&git_blobdiff_plain,
 534         "blob" => \&git_blob,
 535         "blob_plain" => \&git_blob_plain,
 536         "commitdiff" => \&git_commitdiff,
 537         "commitdiff_plain" => \&git_commitdiff_plain,
 538         "commit" => \&git_commit,
 539         "forks" => \&git_forks,
 540         "heads" => \&git_heads,
 541         "history" => \&git_history,
 542         "log" => \&git_log,
 543         "rss" => \&git_rss,
 544         "atom" => \&git_atom,
 545         "search" => \&git_search,
 546         "search_help" => \&git_search_help,
 547         "shortlog" => \&git_shortlog,
 548         "summary" => \&git_summary,
 549         "tag" => \&git_tag,
 550         "tags" => \&git_tags,
 551         "tree" => \&git_tree,
 552         "snapshot" => \&git_snapshot,
 553         "object" => \&git_object,
 554         # those below don't need $project
 555         "opml" => \&git_opml,
 556         "project_list" => \&git_project_list,
 557         "project_index" => \&git_project_index,
 558 );
 559
 560 if (!defined $action) {
 561         if (defined $hash) {
 562                 $action = git_get_type($hash);
 563         } elsif (defined $hash_base && defined $file_name) {
 564                 $action = git_get_type("$hash_base:$file_name");
 565         } elsif (defined $project) {
 566                 $action = 'summary';
 567         } else {
 568                 $action = 'project_list';
 569         }
 570 }
 571 if (!defined($actions{$action})) {
 572         die_error(undef, "Unknown action");
 573 }
 574 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 575     !$project) {
 576         die_error(undef, "Project needed");
 577 }
 578 $actions{$action}->();
 579 exit;
 580
 581 ## ======================================================================
 582 ## action links
 583
 584 sub href(%) {
 585         my %params = @_;
 586         # default is to use -absolute url() i.e. $my_uri
 587         my $href = $params{-full} ? $my_url : $my_uri;
 588
 589         # XXX: Warning: If you touch this, check the search form for updating,
 590         # too.
 591
 592         my @mapping = (
 593                 project => "p",
 594                 action => "a",
 595                 file_name => "f",
 596                 file_parent => "fp",
 597                 hash => "h",
 598                 hash_parent => "hp",
 599                 hash_base => "hb",
 600                 hash_parent_base => "hpb",
 601                 page => "pg",
 602                 order => "o",
 603                 searchtext => "s",
 604                 searchtype => "st",
 605                 snapshot_format => "sf",
 606                 extra_options => "opt",
 607         );
 608         my %mapping = @mapping;
 609
 610         $params{'project'} = $project unless exists $params{'project'};
 611
 612         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 613         if ($use_pathinfo) {
 614                 # use PATH_INFO for project name
 615                 $href .= "/$params{'project'}" if defined $params{'project'};
 616                 delete $params{'project'};
 617
 618                 # Summary just uses the project path URL
 619                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 620                         delete $params{'action'};
 621                 }
 622         }
 623
 624         # now encode the parameters explicitly
 625         my @result = ();
 626         for (my $i = 0; $i < @mapping; $i += 2) {
 627                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 628                 if (defined $params{$name}) {
 629                         if (ref($params{$name}) eq "ARRAY") {
 630                                 foreach my $par (@{$params{$name}}) {
 631                                         push @result, $symbol . "=" . esc_param($par);
 632                                 }
 633                         } else {
 634                                 push @result, $symbol . "=" . esc_param($params{$name});
 635                         }
 636                 }
 637         }
 638         $href .= "?" . join(';', @result) if scalar @result;
 639
 640         return $href;
 641 }
 642
 643
 644 ## ======================================================================
 645 ## validation, quoting/unquoting and escaping
 646
 647 sub validate_pathname {
 648         my $input = shift || return undef;
 649
 650         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 651         # at the beginning, at the end, and between slashes.
 652         # also this catches doubled slashes
 653         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 654                 return undef;
 655         }
 656         # no null characters
 657         if ($input =~ m!\0!) {
 658                 return undef;
 659         }
 660         return $input;
 661 }
 662
 663 sub validate_refname {
 664         my $input = shift || return undef;
 665
 666         # textual hashes are O.K.
 667         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 668                 return $input;
 669         }
 670         # it must be correct pathname
 671         $input = validate_pathname($input)
 672                 or return undef;
 673         # restrictions on ref name according to git-check-ref-format
 674         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 675                 return undef;
 676         }
 677         return $input;
 678 }
 679
 680 # decode sequences of octets in utf8 into Perl's internal form,
 681 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 682 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 683 sub to_utf8 {
 684         my $str = shift;
 685         my $res;
 686         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 687         if (defined $res) {
 688                 return $res;
 689         } else {
 690                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 691         }
 692 }
 693
 694 # quote unsafe chars, but keep the slash, even when it's not
 695 # correct, but quoted slashes look too horrible in bookmarks
 696 sub esc_param {
 697         my $str = shift;
 698         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 699         $str =~ s/\+/%2B/g;
 700         $str =~ s/ /\+/g;
 701         return $str;
 702 }
 703
 704 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 705 sub esc_url {
 706         my $str = shift;
 707         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 708         $str =~ s/\+/%2B/g;
 709         $str =~ s/ /\+/g;
 710         return $str;
 711 }
 712
 713 # replace invalid utf8 character with SUBSTITUTION sequence
 714 sub esc_html ($;%) {
 715         my $str = shift;
 716         my %opts = @_;
 717
 718         $str = to_utf8($str);
 719         $str = $cgi->escapeHTML($str);
 720         if ($opts{'-nbsp'}) {
 721                 $str =~ s/ /&nbsp;/g;
 722         }
 723         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 724         return $str;
 725 }
 726
 727 # quote control characters and escape filename to HTML
 728 sub esc_path {
 729         my $str = shift;
 730         my %opts = @_;
 731
 732         $str = to_utf8($str);
 733         $str = $cgi->escapeHTML($str);
 734         if ($opts{'-nbsp'}) {
 735                 $str =~ s/ /&nbsp;/g;
 736         }
 737         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 738         return $str;
 739 }
 740
 741 # Make control characters "printable", using character escape codes (CEC)
 742 sub quot_cec {
 743         my $cntrl = shift;
 744         my %es = ( # character escape codes, aka escape sequences
 745                    "\t" => '\t',   # tab            (HT)
 746                    "\n" => '\n',   # line feed      (LF)
 747                    "\r" => '\r',   # carrige return (CR)
 748                    "\f" => '\f',   # form feed      (FF)
 749                    "\b" => '\b',   # backspace      (BS)
 750                    "\a" => '\a',   # alarm (bell)   (BEL)
 751                    "\e" => '\e',   # escape         (ESC)
 752                    "\013" => '\v', # vertical tab   (VT)
 753                    "\000" => '\0', # nul character  (NUL)
 754                    );
 755         my $chr = ( (exists $es{$cntrl})
 756                     ? $es{$cntrl}
 757                     : sprintf('\%03o', ord($cntrl)) );
 758         return "<span class=\"cntrl\">$chr</span>";
 759 }
 760
 761 # Alternatively use unicode control pictures codepoints,
 762 # Unicode "printable representation" (PR)
 763 sub quot_upr {
 764         my $cntrl = shift;
 765         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 766         return "<span class=\"cntrl\">$chr</span>";
 767 }
 768
 769 # git may return quoted and escaped filenames
 770 sub unquote {
 771         my $str = shift;
 772
 773         sub unq {
 774                 my $seq = shift;
 775                 my %es = ( # character escape codes, aka escape sequences
 776                         't' => "\t",   # tab            (HT, TAB)
 777                         'n' => "\n",   # newline        (NL)
 778                         'r' => "\r",   # return         (CR)
 779                         'f' => "\f",   # form feed      (FF)
 780                         'b' => "\b",   # backspace      (BS)
 781                         'a' => "\a",   # alarm (bell)   (BEL)
 782                         'e' => "\e",   # escape         (ESC)
 783                         'v' => "\013", # vertical tab   (VT)
 784                 );
 785
 786                 if ($seq =~ m/^[0-7]{1,3}$/) {
 787                         # octal char sequence
 788                         return chr(oct($seq));
 789                 } elsif (exists $es{$seq}) {
 790                         # C escape sequence, aka character escape code
 791                         return $es{$seq}
 792                 }
 793                 # quoted ordinary character
 794                 return $seq;
 795         }
 796
 797         if ($str =~ m/^"(.*)"$/) {
 798                 # needs unquoting
 799                 $str = $1;
 800                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 801         }
 802         return $str;
 803 }
 804
 805 # escape tabs (convert tabs to spaces)
 806 sub untabify {
 807         my $line = shift;
 808
 809         while ((my $pos = index($line, "\t")) != -1) {
 810                 if (my $count = (8 - ($pos % 8))) {
 811                         my $spaces = ' ' x $count;
 812                         $line =~ s/\t/$spaces/;
 813                 }
 814         }
 815
 816         return $line;
 817 }
 818
 819 sub project_in_list {
 820         my $project = shift;
 821         my @list = git_get_projects_list();
 822         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 823 }
 824
 825 ## ----------------------------------------------------------------------
 826 ## HTML aware string manipulation
 827
 828 sub chop_str {
 829         my $str = shift;
 830         my $len = shift;
 831         my $add_len = shift || 10;
 832
 833         # allow only $len chars, but don't cut a word if it would fit in $add_len
 834         # if it doesn't fit, cut it if it's still longer than the dots we would add
 835         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 836         my $body = $1;
 837         my $tail = $2;
 838         if (length($tail) > 4) {
 839                 $tail = " ...";
 840                 $body =~ s/&[^;]*$//; # remove chopped character entities
 841         }
 842         return "$body$tail";
 843 }
 844
 845 ## ----------------------------------------------------------------------
 846 ## functions returning short strings
 847
 848 # CSS class for given age value (in seconds)
 849 sub age_class {
 850         my $age = shift;
 851
 852         if (!defined $age) {
 853                 return "noage";
 854         } elsif ($age < 60*60*2) {
 855                 return "age0";
 856         } elsif ($age < 60*60*24*2) {
 857                 return "age1";
 858         } else {
 859                 return "age2";
 860         }
 861 }
 862
 863 # convert age in seconds to "nn units ago" string
 864 sub age_string {
 865         my $age = shift;
 866         my $age_str;
 867
 868         if ($age > 60*60*24*365*2) {
 869                 $age_str = (int $age/60/60/24/365);
 870                 $age_str .= " years ago";
 871         } elsif ($age > 60*60*24*(365/12)*2) {
 872                 $age_str = int $age/60/60/24/(365/12);
 873                 $age_str .= " months ago";
 874         } elsif ($age > 60*60*24*7*2) {
 875                 $age_str = int $age/60/60/24/7;
 876                 $age_str .= " weeks ago";
 877         } elsif ($age > 60*60*24*2) {
 878                 $age_str = int $age/60/60/24;
 879                 $age_str .= " days ago";
 880         } elsif ($age > 60*60*2) {
 881                 $age_str = int $age/60/60;
 882                 $age_str .= " hours ago";
 883         } elsif ($age > 60*2) {
 884                 $age_str = int $age/60;
 885                 $age_str .= " min ago";
 886         } elsif ($age > 2) {
 887                 $age_str = int $age;
 888                 $age_str .= " sec ago";
 889         } else {
 890                 $age_str .= " right now";
 891         }
 892         return $age_str;
 893 }
 894
 895 use constant {
 896         S_IFINVALID => 0030000,
 897         S_IFGITLINK => 0160000,
 898 };
 899
 900 # submodule/subproject, a commit object reference
 901 sub S_ISGITLINK($) {
 902         my $mode = shift;
 903
 904         return (($mode & S_IFMT) == S_IFGITLINK)
 905 }
 906
 907 # convert file mode in octal to symbolic file mode string
 908 sub mode_str {
 909         my $mode = oct shift;
 910
 911         if (S_ISGITLINK($mode)) {
 912                 return 'm---------';
 913         } elsif (S_ISDIR($mode & S_IFMT)) {
 914                 return 'drwxr-xr-x';
 915         } elsif (S_ISLNK($mode)) {
 916                 return 'lrwxrwxrwx';
 917         } elsif (S_ISREG($mode)) {
 918                 # git cares only about the executable bit
 919                 if ($mode & S_IXUSR) {
 920                         return '-rwxr-xr-x';
 921                 } else {
 922                         return '-rw-r--r--';
 923                 };
 924         } else {
 925                 return '----------';
 926         }
 927 }
 928
 929 # convert file mode in octal to file type string
 930 sub file_type {
 931         my $mode = shift;
 932
 933         if ($mode !~ m/^[0-7]+$/) {
 934                 return $mode;
 935         } else {
 936                 $mode = oct $mode;
 937         }
 938
 939         if (S_ISGITLINK($mode)) {
 940                 return "submodule";
 941         } elsif (S_ISDIR($mode & S_IFMT)) {
 942                 return "directory";
 943         } elsif (S_ISLNK($mode)) {
 944                 return "symlink";
 945         } elsif (S_ISREG($mode)) {
 946                 return "file";
 947         } else {
 948                 return "unknown";
 949         }
 950 }
 951
 952 # convert file mode in octal to file type description string
 953 sub file_type_long {
 954         my $mode = shift;
 955
 956         if ($mode !~ m/^[0-7]+$/) {
 957                 return $mode;
 958         } else {
 959                 $mode = oct $mode;
 960         }
 961
 962         if (S_ISGITLINK($mode)) {
 963                 return "submodule";
 964         } elsif (S_ISDIR($mode & S_IFMT)) {
 965                 return "directory";
 966         } elsif (S_ISLNK($mode)) {
 967                 return "symlink";
 968         } elsif (S_ISREG($mode)) {
 969                 if ($mode & S_IXUSR) {
 970                         return "executable";
 971                 } else {
 972                         return "file";
 973                 };
 974         } else {
 975                 return "unknown";
 976         }
 977 }
 978
 979
 980 ## ----------------------------------------------------------------------
 981 ## functions returning short HTML fragments, or transforming HTML fragments
 982 ## which don't belong to other sections
 983
 984 # format line of commit message.
 985 sub format_log_line_html {
 986         my $line = shift;
 987
 988         $line = esc_html($line, -nbsp=>1);
 989         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 990                 my $hash_text = $1;
 991                 my $link =
 992                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 993                                 -class => "text"}, $hash_text);
 994                 $line =~ s/$hash_text/$link/;
 995         }
 996         return $line;
 997 }
 998
 999 # format marker of refs pointing to given object
1000 sub format_ref_marker {
1001         my ($refs, $id) = @_;
1002         my $markers = '';
1003
1004         if (defined $refs->{$id}) {
1005                 foreach my $ref (@{$refs->{$id}}) {
1006                         my ($type, $name) = qw();
1007                         # e.g. tags/v2.6.11 or heads/next
1008                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1009                                 $type = $1;
1010                                 $name = $2;
1011                         } else {
1012                                 $type = "ref";
1013                                 $name = $ref;
1014                         }
1015
1016                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1017                                     esc_html($name) . "</span>";
1018                 }
1019         }
1020
1021         if ($markers) {
1022                 return ' <span class="refs">'. $markers . '</span>';
1023         } else {
1024                 return "";
1025         }
1026 }
1027
1028 # format, perhaps shortened and with markers, title line
1029 sub format_subject_html {
1030         my ($long, $short, $href, $extra) = @_;
1031         $extra = '' unless defined($extra);
1032
1033         if (length($short) < length($long)) {
1034                 return $cgi->a({-href => $href, -class => "list subject",
1035                                 -title => to_utf8($long)},
1036                        esc_html($short) . $extra);
1037         } else {
1038                 return $cgi->a({-href => $href, -class => "list subject"},
1039                        esc_html($long)  . $extra);
1040         }
1041 }
1042
1043 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1044 sub format_git_diff_header_line {
1045         my $line = shift;
1046         my $diffinfo = shift;
1047         my ($from, $to) = @_;
1048
1049         if ($diffinfo->{'nparents'}) {
1050                 # combined diff
1051                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1052                 if ($to->{'href'}) {
1053                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1054                                          esc_path($to->{'file'}));
1055                 } else { # file was deleted (no href)
1056                         $line .= esc_path($to->{'file'});
1057                 }
1058         } else {
1059                 # "ordinary" diff
1060                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1061                 if ($from->{'href'}) {
1062                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1063                                          'a/' . esc_path($from->{'file'}));
1064                 } else { # file was added (no href)
1065                         $line .= 'a/' . esc_path($from->{'file'});
1066                 }
1067                 $line .= ' ';
1068                 if ($to->{'href'}) {
1069                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1070                                          'b/' . esc_path($to->{'file'}));
1071                 } else { # file was deleted
1072                         $line .= 'b/' . esc_path($to->{'file'});
1073                 }
1074         }
1075
1076         return "<div class=\"diff header\">$line</div>\n";
1077 }
1078
1079 # format extended diff header line, before patch itself
1080 sub format_extended_diff_header_line {
1081         my $line = shift;
1082         my $diffinfo = shift;
1083         my ($from, $to) = @_;
1084
1085         # match <path>
1086         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1087                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1088                                        esc_path($from->{'file'}));
1089         }
1090         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1091                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1092                                  esc_path($to->{'file'}));
1093         }
1094         # match single <mode>
1095         if ($line =~ m/\s(\d{6})$/) {
1096                 $line .= '<span class="info"> (' .
1097                          file_type_long($1) .
1098                          ')</span>';
1099         }
1100         # match <hash>
1101         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1102                 # can match only for combined diff
1103                 $line = 'index ';
1104                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1105                         if ($from->{'href'}[$i]) {
1106                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1107                                                   -class=>"hash"},
1108                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1109                         } else {
1110                                 $line .= '0' x 7;
1111                         }
1112                         # separator
1113                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1114                 }
1115                 $line .= '..';
1116                 if ($to->{'href'}) {
1117                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1118                                          substr($diffinfo->{'to_id'},0,7));
1119                 } else {
1120                         $line .= '0' x 7;
1121                 }
1122
1123         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1124                 # can match only for ordinary diff
1125                 my ($from_link, $to_link);
1126                 if ($from->{'href'}) {
1127                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1128                                              substr($diffinfo->{'from_id'},0,7));
1129                 } else {
1130                         $from_link = '0' x 7;
1131                 }
1132                 if ($to->{'href'}) {
1133                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1134                                            substr($diffinfo->{'to_id'},0,7));
1135                 } else {
1136                         $to_link = '0' x 7;
1137                 }
1138                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1139                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1140         }
1141
1142         return $line . "<br/>\n";
1143 }
1144
1145 # format from-file/to-file diff header
1146 sub format_diff_from_to_header {
1147         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1148         my $line;
1149         my $result = '';
1150
1151         $line = $from_line;
1152         #assert($line =~ m/^---/) if DEBUG;
1153         # no extra formatting for "^--- /dev/null"
1154         if (! $diffinfo->{'nparents'}) {
1155                 # ordinary (single parent) diff
1156                 if ($line =~ m!^--- "?a/!) {
1157                         if ($from->{'href'}) {
1158                                 $line = '--- a/' .
1159                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1160                                                 esc_path($from->{'file'}));
1161                         } else {
1162                                 $line = '--- a/' .
1163                                         esc_path($from->{'file'});
1164                         }
1165                 }
1166                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1167
1168         } else {
1169                 # combined diff (merge commit)
1170                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1171                         if ($from->{'href'}[$i]) {
1172                                 $line = '--- ' .
1173                                         $cgi->a({-href=>href(action=>"blobdiff",
1174                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1175                                                              hash_parent_base=>$parents[$i],
1176                                                              file_parent=>$from->{'file'}[$i],
1177                                                              hash=>$diffinfo->{'to_id'},
1178                                                              hash_base=>$hash,
1179                                                              file_name=>$to->{'file'}),
1180                                                  -class=>"path",
1181                                                  -title=>"diff" . ($i+1)},
1182                                                 $i+1) .
1183                                         '/' .
1184                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1185                                                 esc_path($from->{'file'}[$i]));
1186                         } else {
1187                                 $line = '--- /dev/null';
1188                         }
1189                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1190                 }
1191         }
1192
1193         $line = $to_line;
1194         #assert($line =~ m/^\+\+\+/) if DEBUG;
1195         # no extra formatting for "^+++ /dev/null"
1196         if ($line =~ m!^\+\+\+ "?b/!) {
1197                 if ($to->{'href'}) {
1198                         $line = '+++ b/' .
1199                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1200                                         esc_path($to->{'file'}));
1201                 } else {
1202                         $line = '+++ b/' .
1203                                 esc_path($to->{'file'});
1204                 }
1205         }
1206         $result .= qq!<div class="diff to_file">$line</div>\n!;
1207
1208         return $result;
1209 }
1210
1211 # create note for patch simplified by combined diff
1212 sub format_diff_cc_simplified {
1213         my ($diffinfo, @parents) = @_;
1214         my $result = '';
1215
1216         $result .= "<div class=\"diff header\">" .
1217                    "diff --cc ";
1218         if (!is_deleted($diffinfo)) {
1219                 $result .= $cgi->a({-href => href(action=>"blob",
1220                                                   hash_base=>$hash,
1221                                                   hash=>$diffinfo->{'to_id'},
1222                                                   file_name=>$diffinfo->{'to_file'}),
1223                                     -class => "path"},
1224                                    esc_path($diffinfo->{'to_file'}));
1225         } else {
1226                 $result .= esc_path($diffinfo->{'to_file'});
1227         }
1228         $result .= "</div>\n" . # class="diff header"
1229                    "<div class=\"diff nodifferences\">" .
1230                    "Simple merge" .
1231                    "</div>\n"; # class="diff nodifferences"
1232
1233         return $result;
1234 }
1235
1236 # format patch (diff) line (not to be used for diff headers)
1237 sub format_diff_line {
1238         my $line = shift;
1239         my ($from, $to) = @_;
1240         my $diff_class = "";
1241
1242         chomp $line;
1243
1244         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1245                 # combined diff
1246                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1247                 if ($line =~ m/^\@{3}/) {
1248                         $diff_class = " chunk_header";
1249                 } elsif ($line =~ m/^\\/) {
1250                         $diff_class = " incomplete";
1251                 } elsif ($prefix =~ tr/+/+/) {
1252                         $diff_class = " add";
1253                 } elsif ($prefix =~ tr/-/-/) {
1254                         $diff_class = " rem";
1255                 }
1256         } else {
1257                 # assume ordinary diff
1258                 my $char = substr($line, 0, 1);
1259                 if ($char eq '+') {
1260                         $diff_class = " add";
1261                 } elsif ($char eq '-') {
1262                         $diff_class = " rem";
1263                 } elsif ($char eq '@') {
1264                         $diff_class = " chunk_header";
1265                 } elsif ($char eq "\\") {
1266                         $diff_class = " incomplete";
1267                 }
1268         }
1269         $line = untabify($line);
1270         if ($from && $to && $line =~ m/^\@{2} /) {
1271                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1272                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1273
1274                 $from_lines = 0 unless defined $from_lines;
1275                 $to_lines   = 0 unless defined $to_lines;
1276
1277                 if ($from->{'href'}) {
1278                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1279                                              -class=>"list"}, $from_text);
1280                 }
1281                 if ($to->{'href'}) {
1282                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1283                                              -class=>"list"}, $to_text);
1284                 }
1285                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1286                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1287                 return "<div class=\"diff$diff_class\">$line</div>\n";
1288         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1289                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1290                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1291
1292                 @from_text = split(' ', $ranges);
1293                 for (my $i = 0; $i < @from_text; ++$i) {
1294                         ($from_start[$i], $from_nlines[$i]) =
1295                                 (split(',', substr($from_text[$i], 1)), 0);
1296                 }
1297
1298                 $to_text   = pop @from_text;
1299                 $to_start  = pop @from_start;
1300                 $to_nlines = pop @from_nlines;
1301
1302                 $line = "<span class=\"chunk_info\">$prefix ";
1303                 for (my $i = 0; $i < @from_text; ++$i) {
1304                         if ($from->{'href'}[$i]) {
1305                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1306                                                   -class=>"list"}, $from_text[$i]);
1307                         } else {
1308                                 $line .= $from_text[$i];
1309                         }
1310                         $line .= " ";
1311                 }
1312                 if ($to->{'href'}) {
1313                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1314                                           -class=>"list"}, $to_text);
1315                 } else {
1316                         $line .= $to_text;
1317                 }
1318                 $line .= " $prefix</span>" .
1319                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1320                 return "<div class=\"diff$diff_class\">$line</div>\n";
1321         }
1322         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1323 }
1324
1325 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1326 # linked.  Pass the hash of the tree/commit to snapshot.
1327 sub format_snapshot_links {
1328         my ($hash) = @_;
1329         my @snapshot_fmts = gitweb_check_feature('snapshot');
1330         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1331         my $num_fmts = @snapshot_fmts;
1332         if ($num_fmts > 1) {
1333                 # A parenthesized list of links bearing format names.
1334                 # e.g. "snapshot (_tar.gz_ _zip_)"
1335                 return "snapshot (" . join(' ', map
1336                         $cgi->a({
1337                                 -href => href(
1338                                         action=>"snapshot",
1339                                         hash=>$hash,
1340                                         snapshot_format=>$_
1341                                 )
1342                         }, $known_snapshot_formats{$_}{'display'})
1343                 , @snapshot_fmts) . ")";
1344         } elsif ($num_fmts == 1) {
1345                 # A single "snapshot" link whose tooltip bears the format name.
1346                 # i.e. "_snapshot_"
1347                 my ($fmt) = @snapshot_fmts;
1348                 return
1349                         $cgi->a({
1350                                 -href => href(
1351                                         action=>"snapshot",
1352                                         hash=>$hash,
1353                                         snapshot_format=>$fmt
1354                                 ),
1355                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1356                         }, "snapshot");
1357         } else { # $num_fmts == 0
1358                 return undef;
1359         }
1360 }
1361
1362 ## ----------------------------------------------------------------------
1363 ## git utility subroutines, invoking git commands
1364
1365 # returns path to the core git executable and the --git-dir parameter as list
1366 sub git_cmd {
1367         return $GIT, '--git-dir='.$git_dir;
1368 }
1369
1370 # returns path to the core git executable and the --git-dir parameter as string
1371 sub git_cmd_str {
1372         return join(' ', git_cmd());
1373 }
1374
1375 # get HEAD ref of given project as hash
1376 sub git_get_head_hash {
1377         my $project = shift;
1378         my $o_git_dir = $git_dir;
1379         my $retval = undef;
1380         $git_dir = "$projectroot/$project";
1381         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1382                 my $head = <$fd>;
1383                 close $fd;
1384                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1385                         $retval = $1;
1386                 }
1387         }
1388         if (defined $o_git_dir) {
1389                 $git_dir = $o_git_dir;
1390         }
1391         return $retval;
1392 }
1393
1394 # get type of given object
1395 sub git_get_type {
1396         my $hash = shift;
1397
1398         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1399         my $type = <$fd>;
1400         close $fd or return;
1401         chomp $type;
1402         return $type;
1403 }
1404
1405 sub git_get_project_config {
1406         my ($key, $type) = @_;
1407
1408         return unless ($key);
1409         $key =~ s/^gitweb\.//;
1410         return if ($key =~ m/\W/);
1411
1412         my @x = (git_cmd(), 'config');
1413         if (defined $type) { push @x, $type; }
1414         push @x, "--get";
1415         push @x, "gitweb.$key";
1416         my $val = qx(@x);
1417         chomp $val;
1418         return ($val);
1419 }
1420
1421 # get hash of given path at given ref
1422 sub git_get_hash_by_path {
1423         my $base = shift;
1424         my $path = shift || return undef;
1425         my $type = shift;
1426
1427         $path =~ s,/+$,,;
1428
1429         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1430                 or die_error(undef, "Open git-ls-tree failed");
1431         my $line = <$fd>;
1432         close $fd or return undef;
1433
1434         if (!defined $line) {
1435                 # there is no tree or hash given by $path at $base
1436                 return undef;
1437         }
1438
1439         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1440         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1441         if (defined $type && $type ne $2) {
1442                 # type doesn't match
1443                 return undef;
1444         }
1445         return $3;
1446 }
1447
1448 # get path of entry with given hash at given tree-ish (ref)
1449 # used to get 'from' filename for combined diff (merge commit) for renames
1450 sub git_get_path_by_hash {
1451         my $base = shift || return;
1452         my $hash = shift || return;
1453
1454         local $/ = "\0";
1455
1456         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1457                 or return undef;
1458         while (my $line = <$fd>) {
1459                 chomp $line;
1460
1461                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1462                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1463                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1464                         close $fd;
1465                         return $1;
1466                 }
1467         }
1468         close $fd;
1469         return undef;
1470 }
1471
1472 ## ......................................................................
1473 ## git utility functions, directly accessing git repository
1474
1475 sub git_get_project_description {
1476         my $path = shift;
1477
1478         open my $fd, "$projectroot/$path/description" or return undef;
1479         my $descr = <$fd>;
1480         close $fd;
1481         if (defined $descr) {
1482                 chomp $descr;
1483         }
1484         return $descr;
1485 }
1486
1487 sub git_get_project_url_list {
1488         my $path = shift;
1489
1490         open my $fd, "$projectroot/$path/cloneurl" or return;
1491         my @git_project_url_list = map { chomp; $_ } <$fd>;
1492         close $fd;
1493
1494         return wantarray ? @git_project_url_list : \@git_project_url_list;
1495 }
1496
1497 sub git_get_projects_list {
1498         my ($filter) = @_;
1499         my @list;
1500
1501         $filter ||= '';
1502         $filter =~ s/\.git$//;
1503
1504         my ($check_forks) = gitweb_check_feature('forks');
1505
1506         if (-d $projects_list) {
1507                 # search in directory
1508                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1509                 # remove the trailing "/"
1510                 $dir =~ s!/+$!!;
1511                 my $pfxlen = length("$dir");
1512
1513                 File::Find::find({
1514                         follow_fast => 1, # follow symbolic links
1515                         follow_skip => 2, # ignore duplicates
1516                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1517                         wanted => sub {
1518                                 # skip project-list toplevel, if we get it.
1519                                 return if (m!^[/.]$!);
1520                                 # only directories can be git repositories
1521                                 return unless (-d $_);
1522
1523                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1524                                 # we check related file in $projectroot
1525                                 if ($check_forks and $subdir =~ m#/.#) {
1526                                         $File::Find::prune = 1;
1527                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1528                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1529                                         $File::Find::prune = 1;
1530                                 }
1531                         },
1532                 }, "$dir");
1533
1534         } elsif (-f $projects_list) {
1535                 # read from file(url-encoded):
1536                 # 'git%2Fgit.git Linus+Torvalds'
1537                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1538                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1539                 my %paths;
1540                 open my ($fd), $projects_list or return;
1541         PROJECT:
1542                 while (my $line = <$fd>) {
1543                         chomp $line;
1544                         my ($path, $owner) = split ' ', $line;
1545                         $path = unescape($path);
1546                         $owner = unescape($owner);
1547                         if (!defined $path) {
1548                                 next;
1549                         }
1550                         if ($filter ne '') {
1551                                 # looking for forks;
1552                                 my $pfx = substr($path, 0, length($filter));
1553                                 if ($pfx ne $filter) {
1554                                         next PROJECT;
1555                                 }
1556                                 my $sfx = substr($path, length($filter));
1557                                 if ($sfx !~ /^\/.*\.git$/) {
1558                                         next PROJECT;
1559                                 }
1560                         } elsif ($check_forks) {
1561                         PATH:
1562                                 foreach my $filter (keys %paths) {
1563                                         # looking for forks;
1564                                         my $pfx = substr($path, 0, length($filter));
1565                                         if ($pfx ne $filter) {
1566                                                 next PATH;
1567                                         }
1568                                         my $sfx = substr($path, length($filter));
1569                                         if ($sfx !~ /^\/.*\.git$/) {
1570                                                 next PATH;
1571                                         }
1572                                         # is a fork, don't include it in
1573                                         # the list
1574                                         next PROJECT;
1575                                 }
1576                         }
1577                         if (check_export_ok("$projectroot/$path")) {
1578                                 my $pr = {
1579                                         path => $path,
1580                                         owner => to_utf8($owner),
1581                                 };
1582                                 push @list, $pr;
1583                                 (my $forks_path = $path) =~ s/\.git$//;
1584                                 $paths{$forks_path}++;
1585                         }
1586                 }
1587                 close $fd;
1588         }
1589         return @list;
1590 }
1591
1592 our $gitweb_project_owner = undef;
1593 sub git_get_project_list_from_file {
1594
1595         return if (defined $gitweb_project_owner);
1596
1597         $gitweb_project_owner = {};
1598         # read from file (url-encoded):
1599         # 'git%2Fgit.git Linus+Torvalds'
1600         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1601         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1602         if (-f $projects_list) {
1603                 open (my $fd , $projects_list);
1604                 while (my $line = <$fd>) {
1605                         chomp $line;
1606                         my ($pr, $ow) = split ' ', $line;
1607                         $pr = unescape($pr);
1608                         $ow = unescape($ow);
1609                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1610                 }
1611                 close $fd;
1612         }
1613 }
1614
1615 sub git_get_project_owner {
1616         my $project = shift;
1617         my $owner;
1618
1619         return undef unless $project;
1620
1621         if (!defined $gitweb_project_owner) {
1622                 git_get_project_list_from_file();
1623         }
1624
1625         if (exists $gitweb_project_owner->{$project}) {
1626                 $owner = $gitweb_project_owner->{$project};
1627         }
1628         if (!defined $owner) {
1629                 $owner = get_file_owner("$projectroot/$project");
1630         }
1631
1632         return $owner;
1633 }
1634
1635 sub git_get_last_activity {
1636         my ($path) = @_;
1637         my $fd;
1638
1639         $git_dir = "$projectroot/$path";
1640         open($fd, "-|", git_cmd(), 'for-each-ref',
1641              '--format=%(committer)',
1642              '--sort=-committerdate',
1643              '--count=1',
1644              'refs/heads') or return;
1645         my $most_recent = <$fd>;
1646         close $fd or return;
1647         if (defined $most_recent &&
1648             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1649                 my $timestamp = $1;
1650                 my $age = time - $timestamp;
1651                 return ($age, age_string($age));
1652         }
1653         return (undef, undef);
1654 }
1655
1656 sub git_get_references {
1657         my $type = shift || "";
1658         my %refs;
1659         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1660         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1661         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1662                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1663                 or return;
1664
1665         while (my $line = <$fd>) {
1666                 chomp $line;
1667                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1668                         if (defined $refs{$1}) {
1669                                 push @{$refs{$1}}, $2;
1670                         } else {
1671                                 $refs{$1} = [ $2 ];
1672                         }
1673                 }
1674         }
1675         close $fd or return;
1676         return \%refs;
1677 }
1678
1679 sub git_get_rev_name_tags {
1680         my $hash = shift || return undef;
1681
1682         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1683                 or return;
1684         my $name_rev = <$fd>;
1685         close $fd;
1686
1687         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1688                 return $1;
1689         } else {
1690                 # catches also '$hash undefined' output
1691                 return undef;
1692         }
1693 }
1694
1695 ## ----------------------------------------------------------------------
1696 ## parse to hash functions
1697
1698 sub parse_date {
1699         my $epoch = shift;
1700         my $tz = shift || "-0000";
1701
1702         my %date;
1703         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1704         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1705         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1706         $date{'hour'} = $hour;
1707         $date{'minute'} = $min;
1708         $date{'mday'} = $mday;
1709         $date{'day'} = $days[$wday];
1710         $date{'month'} = $months[$mon];
1711         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1712                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1713         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1714                              $mday, $months[$mon], $hour ,$min;
1715         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1716                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1717
1718         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1719         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1720         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1721         $date{'hour_local'} = $hour;
1722         $date{'minute_local'} = $min;
1723         $date{'tz_local'} = $tz;
1724         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1725                                   1900+$year, $mon+1, $mday,
1726                                   $hour, $min, $sec, $tz);
1727         return %date;
1728 }
1729
1730 sub parse_tag {
1731         my $tag_id = shift;
1732         my %tag;
1733         my @comment;
1734
1735         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1736         $tag{'id'} = $tag_id;
1737         while (my $line = <$fd>) {
1738                 chomp $line;
1739                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1740                         $tag{'object'} = $1;
1741                 } elsif ($line =~ m/^type (.+)$/) {
1742                         $tag{'type'} = $1;
1743                 } elsif ($line =~ m/^tag (.+)$/) {
1744                         $tag{'name'} = $1;
1745                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1746                         $tag{'author'} = $1;
1747                         $tag{'epoch'} = $2;
1748                         $tag{'tz'} = $3;
1749                 } elsif ($line =~ m/--BEGIN/) {
1750                         push @comment, $line;
1751                         last;
1752                 } elsif ($line eq "") {
1753                         last;
1754                 }
1755         }
1756         push @comment, <$fd>;
1757         $tag{'comment'} = \@comment;
1758         close $fd or return;
1759         if (!defined $tag{'name'}) {
1760                 return
1761         };
1762         return %tag
1763 }
1764
1765 sub parse_commit_text {
1766         my ($commit_text, $withparents) = @_;
1767         my @commit_lines = split '\n', $commit_text;
1768         my %co;
1769
1770         pop @commit_lines; # Remove '\0'
1771
1772         if (! @commit_lines) {
1773                 return;
1774         }
1775
1776         my $header = shift @commit_lines;
1777         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1778                 return;
1779         }
1780         ($co{'id'}, my @parents) = split ' ', $header;
1781         while (my $line = shift @commit_lines) {
1782                 last if $line eq "\n";
1783                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1784                         $co{'tree'} = $1;
1785                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1786                         push @parents, $1;
1787                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1788                         $co{'author'} = $1;
1789                         $co{'author_epoch'} = $2;
1790                         $co{'author_tz'} = $3;
1791                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1792                                 $co{'author_name'}  = $1;
1793                                 $co{'author_email'} = $2;
1794                         } else {
1795                                 $co{'author_name'} = $co{'author'};
1796                         }
1797                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1798                         $co{'committer'} = $1;
1799                         $co{'committer_epoch'} = $2;
1800                         $co{'committer_tz'} = $3;
1801                         $co{'committer_name'} = $co{'committer'};
1802                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1803                                 $co{'committer_name'}  = $1;
1804                                 $co{'committer_email'} = $2;
1805                         } else {
1806                                 $co{'committer_name'} = $co{'committer'};
1807                         }
1808                 }
1809         }
1810         if (!defined $co{'tree'}) {
1811                 return;
1812         };
1813         $co{'parents'} = \@parents;
1814         $co{'parent'} = $parents[0];
1815
1816         foreach my $title (@commit_lines) {
1817                 $title =~ s/^    //;
1818                 if ($title ne "") {
1819                         $co{'title'} = chop_str($title, 80, 5);
1820                         # remove leading stuff of merges to make the interesting part visible
1821                         if (length($title) > 50) {
1822                                 $title =~ s/^Automatic //;
1823                                 $title =~ s/^merge (of|with) /Merge ... /i;
1824                                 if (length($title) > 50) {
1825                                         $title =~ s/(http|rsync):\/\///;
1826                                 }
1827                                 if (length($title) > 50) {
1828                                         $title =~ s/(master|www|rsync)\.//;
1829                                 }
1830                                 if (length($title) > 50) {
1831                                         $title =~ s/kernel.org:?//;
1832                                 }
1833                                 if (length($title) > 50) {
1834                                         $title =~ s/\/pub\/scm//;
1835                                 }
1836                         }
1837                         $co{'title_short'} = chop_str($title, 50, 5);
1838                         last;
1839                 }
1840         }
1841         if ($co{'title'} eq "") {
1842                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1843         }
1844         # remove added spaces
1845         foreach my $line (@commit_lines) {
1846                 $line =~ s/^    //;
1847         }
1848         $co{'comment'} = \@commit_lines;
1849
1850         my $age = time - $co{'committer_epoch'};
1851         $co{'age'} = $age;
1852         $co{'age_string'} = age_string($age);
1853         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1854         if ($age > 60*60*24*7*2) {
1855                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1856                 $co{'age_string_age'} = $co{'age_string'};
1857         } else {
1858                 $co{'age_string_date'} = $co{'age_string'};
1859                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1860         }
1861         return %co;
1862 }
1863
1864 sub parse_commit {
1865         my ($commit_id) = @_;
1866         my %co;
1867
1868         local $/ = "\0";
1869
1870         open my $fd, "-|", git_cmd(), "rev-list",
1871                 "--parents",
1872                 "--header",
1873                 "--max-count=1",
1874                 $commit_id,
1875                 "--",
1876                 or die_error(undef, "Open git-rev-list failed");
1877         %co = parse_commit_text(<$fd>, 1);
1878         close $fd;
1879
1880         return %co;
1881 }
1882
1883 sub parse_commits {
1884         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1885         my @cos;
1886
1887         $maxcount ||= 1;
1888         $skip ||= 0;
1889
1890         local $/ = "\0";
1891
1892         open my $fd, "-|", git_cmd(), "rev-list",
1893                 "--header",
1894                 ($arg ? ($arg) : ()),
1895                 ("--max-count=" . $maxcount),
1896                 ("--skip=" . $skip),
1897                 @extra_options,
1898                 $commit_id,
1899                 "--",
1900                 ($filename ? ($filename) : ())
1901                 or die_error(undef, "Open git-rev-list failed");
1902         while (my $line = <$fd>) {
1903                 my %co = parse_commit_text($line);
1904                 push @cos, \%co;
1905         }
1906         close $fd;
1907
1908         return wantarray ? @cos : \@cos;
1909 }
1910
1911 # parse ref from ref_file, given by ref_id, with given type
1912 sub parse_ref {
1913         my $ref_file = shift;
1914         my $ref_id = shift;
1915         my $type = shift || git_get_type($ref_id);
1916         my %ref_item;
1917
1918         $ref_item{'type'} = $type;
1919         $ref_item{'id'} = $ref_id;
1920         $ref_item{'epoch'} = 0;
1921         $ref_item{'age'} = "unknown";
1922         if ($type eq "tag") {
1923                 my %tag = parse_tag($ref_id);
1924                 $ref_item{'comment'} = $tag{'comment'};
1925                 if ($tag{'type'} eq "commit") {
1926                         my %co = parse_commit($tag{'object'});
1927                         $ref_item{'epoch'} = $co{'committer_epoch'};
1928                         $ref_item{'age'} = $co{'age_string'};
1929                 } elsif (defined($tag{'epoch'})) {
1930                         my $age = time - $tag{'epoch'};
1931                         $ref_item{'epoch'} = $tag{'epoch'};
1932                         $ref_item{'age'} = age_string($age);
1933                 }
1934                 $ref_item{'reftype'} = $tag{'type'};
1935                 $ref_item{'name'} = $tag{'name'};
1936                 $ref_item{'refid'} = $tag{'object'};
1937         } elsif ($type eq "commit"){
1938                 my %co = parse_commit($ref_id);
1939                 $ref_item{'reftype'} = "commit";
1940                 $ref_item{'name'} = $ref_file;
1941                 $ref_item{'title'} = $co{'title'};
1942                 $ref_item{'refid'} = $ref_id;
1943                 $ref_item{'epoch'} = $co{'committer_epoch'};
1944                 $ref_item{'age'} = $co{'age_string'};
1945         } else {
1946                 $ref_item{'reftype'} = $type;
1947                 $ref_item{'name'} = $ref_file;
1948                 $ref_item{'refid'} = $ref_id;
1949         }
1950
1951         return %ref_item;
1952 }
1953
1954 # parse line of git-diff-tree "raw" output
1955 sub parse_difftree_raw_line {
1956         my $line = shift;
1957         my %res;
1958
1959         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1960         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1961         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1962                 $res{'from_mode'} = $1;
1963                 $res{'to_mode'} = $2;
1964                 $res{'from_id'} = $3;
1965                 $res{'to_id'} = $4;
1966                 $res{'status'} = $5;
1967                 $res{'similarity'} = $6;
1968                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1969                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1970                 } else {
1971                         $res{'file'} = unquote($7);
1972                 }
1973         }
1974         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1975         # combined diff (for merge commit)
1976         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1977                 $res{'nparents'}  = length($1);
1978                 $res{'from_mode'} = [ split(' ', $2) ];
1979                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1980                 $res{'from_id'} = [ split(' ', $3) ];
1981                 $res{'to_id'} = pop @{$res{'from_id'}};
1982                 $res{'status'} = [ split('', $4) ];
1983                 $res{'to_file'} = unquote($5);
1984         }
1985         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1986         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1987                 $res{'commit'} = $1;
1988         }
1989
1990         return wantarray ? %res : \%res;
1991 }
1992
1993 # parse line of git-ls-tree output
1994 sub parse_ls_tree_line ($;%) {
1995         my $line = shift;
1996         my %opts = @_;
1997         my %res;
1998
1999         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2000         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2001
2002         $res{'mode'} = $1;
2003         $res{'type'} = $2;
2004         $res{'hash'} = $3;
2005         if ($opts{'-z'}) {
2006                 $res{'name'} = $4;
2007         } else {
2008                 $res{'name'} = unquote($4);
2009         }
2010
2011         return wantarray ? %res : \%res;
2012 }
2013
2014 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2015 sub parse_from_to_diffinfo {
2016         my ($diffinfo, $from, $to, @parents) = @_;
2017
2018         if ($diffinfo->{'nparents'}) {
2019                 # combined diff
2020                 $from->{'file'} = [];
2021                 $from->{'href'} = [];
2022                 fill_from_file_info($diffinfo, @parents)
2023                         unless exists $diffinfo->{'from_file'};
2024                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2025                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2026                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2027                                 $from->{'href'}[$i] = href(action=>"blob",
2028                                                            hash_base=>$parents[$i],
2029                                                            hash=>$diffinfo->{'from_id'}[$i],
2030                                                            file_name=>$from->{'file'}[$i]);
2031                         } else {
2032                                 $from->{'href'}[$i] = undef;
2033                         }
2034                 }
2035         } else {
2036                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2037                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2038                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2039                                                hash=>$diffinfo->{'from_id'},
2040                                                file_name=>$from->{'file'});
2041                 } else {
2042                         delete $from->{'href'};
2043                 }
2044         }
2045
2046         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2047         if (!is_deleted($diffinfo)) { # file exists in result
2048                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2049                                      hash=>$diffinfo->{'to_id'},
2050                                      file_name=>$to->{'file'});
2051         } else {
2052                 delete $to->{'href'};
2053         }
2054 }
2055
2056 ## ......................................................................
2057 ## parse to array of hashes functions
2058
2059 sub git_get_heads_list {
2060         my $limit = shift;
2061         my @headslist;
2062
2063         open my $fd, '-|', git_cmd(), 'for-each-ref',
2064                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2065                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2066                 'refs/heads'
2067                 or return;
2068         while (my $line = <$fd>) {
2069                 my %ref_item;
2070
2071                 chomp $line;
2072                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2073                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2074                 my ($committer, $epoch, $tz) =
2075                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2076                 $name =~ s!^refs/heads/!!;
2077
2078                 $ref_item{'name'}  = $name;
2079                 $ref_item{'id'}    = $hash;
2080                 $ref_item{'title'} = $title || '(no commit message)';
2081                 $ref_item{'epoch'} = $epoch;
2082                 if ($epoch) {
2083                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2084                 } else {
2085                         $ref_item{'age'} = "unknown";
2086                 }
2087
2088                 push @headslist, \%ref_item;
2089         }
2090         close $fd;
2091
2092         return wantarray ? @headslist : \@headslist;
2093 }
2094
2095 sub git_get_tags_list {
2096         my $limit = shift;
2097         my @tagslist;
2098
2099         open my $fd, '-|', git_cmd(), 'for-each-ref',
2100                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2101                 '--format=%(objectname) %(objecttype) %(refname) '.
2102                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2103                 'refs/tags'
2104                 or return;
2105         while (my $line = <$fd>) {
2106                 my %ref_item;
2107
2108                 chomp $line;
2109                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2110                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2111                 my ($creator, $epoch, $tz) =
2112                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2113                 $name =~ s!^refs/tags/!!;
2114
2115                 $ref_item{'type'} = $type;
2116                 $ref_item{'id'} = $id;
2117                 $ref_item{'name'} = $name;
2118                 if ($type eq "tag") {
2119                         $ref_item{'subject'} = $title;
2120                         $ref_item{'reftype'} = $reftype;
2121                         $ref_item{'refid'}   = $refid;
2122                 } else {
2123                         $ref_item{'reftype'} = $type;
2124                         $ref_item{'refid'}   = $id;
2125                 }
2126
2127                 if ($type eq "tag" || $type eq "commit") {
2128                         $ref_item{'epoch'} = $epoch;
2129                         if ($epoch) {
2130                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2131                         } else {
2132                                 $ref_item{'age'} = "unknown";
2133                         }
2134                 }
2135
2136                 push @tagslist, \%ref_item;
2137         }
2138         close $fd;
2139
2140         return wantarray ? @tagslist : \@tagslist;
2141 }
2142
2143 ## ----------------------------------------------------------------------
2144 ## filesystem-related functions
2145
2146 sub get_file_owner {
2147         my $path = shift;
2148
2149         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2150         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2151         if (!defined $gcos) {
2152                 return undef;
2153         }
2154         my $owner = $gcos;
2155         $owner =~ s/[,;].*$//;
2156         return to_utf8($owner);
2157 }
2158
2159 ## ......................................................................
2160 ## mimetype related functions
2161
2162 sub mimetype_guess_file {
2163         my $filename = shift;
2164         my $mimemap = shift;
2165         -r $mimemap or return undef;
2166
2167         my %mimemap;
2168         open(MIME, $mimemap) or return undef;
2169         while (<MIME>) {
2170                 next if m/^#/; # skip comments
2171                 my ($mime, $exts) = split(/\t+/);
2172                 if (defined $exts) {
2173                         my @exts = split(/\s+/, $exts);
2174                         foreach my $ext (@exts) {
2175                                 $mimemap{$ext} = $mime;
2176                         }
2177                 }
2178         }
2179         close(MIME);
2180
2181         $filename =~ /\.([^.]*)$/;
2182         return $mimemap{$1};
2183 }
2184
2185 sub mimetype_guess {
2186         my $filename = shift;
2187         my $mime;
2188         $filename =~ /\./ or return undef;
2189
2190         if ($mimetypes_file) {
2191                 my $file = $mimetypes_file;
2192                 if ($file !~ m!^/!) { # if it is relative path
2193                         # it is relative to project
2194                         $file = "$projectroot/$project/$file";
2195                 }
2196                 $mime = mimetype_guess_file($filename, $file);
2197         }
2198         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2199         return $mime;
2200 }
2201
2202 sub blob_mimetype {
2203         my $fd = shift;
2204         my $filename = shift;
2205
2206         if ($filename) {
2207                 my $mime = mimetype_guess($filename);
2208                 $mime and return $mime;
2209         }
2210
2211         # just in case
2212         return $default_blob_plain_mimetype unless $fd;
2213
2214         if (-T $fd) {
2215                 return 'text/plain' .
2216                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2217         } elsif (! $filename) {
2218                 return 'application/octet-stream';
2219         } elsif ($filename =~ m/\.png$/i) {
2220                 return 'image/png';
2221         } elsif ($filename =~ m/\.gif$/i) {
2222                 return 'image/gif';
2223         } elsif ($filename =~ m/\.jpe?g$/i) {
2224                 return 'image/jpeg';
2225         } else {
2226                 return 'application/octet-stream';
2227         }
2228 }
2229
2230 ## ======================================================================
2231 ## functions printing HTML: header, footer, error page
2232
2233 sub git_header_html {
2234         my $status = shift || "200 OK";
2235         my $expires = shift;
2236
2237         my $title = "$site_name";
2238         if (defined $project) {
2239                 $title .= " - " . to_utf8($project);
2240                 if (defined $action) {
2241                         $title .= "/$action";
2242                         if (defined $file_name) {
2243                                 $title .= " - " . esc_path($file_name);
2244                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2245                                         $title .= "/";
2246                                 }
2247                         }
2248                 }
2249         }
2250         my $content_type;
2251         # require explicit support from the UA if we are to send the page as
2252         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2253         # we have to do this because MSIE sometimes globs '*/*', pretending to
2254         # support xhtml+xml but choking when it gets what it asked for.
2255         if (defined $cgi->http('HTTP_ACCEPT') &&
2256             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2257             $cgi->Accept('application/xhtml+xml') != 0) {
2258                 $content_type = 'application/xhtml+xml';
2259         } else {
2260                 $content_type = 'text/html';
2261         }
2262         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2263                            -status=> $status, -expires => $expires);
2264         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2265         print <<EOF;
2266 <?xml version="1.0" encoding="utf-8"?>
2267 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2268 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2269 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2270 <!-- git core binaries version $git_version -->
2271 <head>
2272 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2273 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2274 <meta name="robots" content="index, nofollow"/>
2275 <title>$title</title>
2276 EOF
2277 # print out each stylesheet that exist
2278         if (defined $stylesheet) {
2279 #provides backwards capability for those people who define style sheet in a config file
2280                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2281         } else {
2282                 foreach my $stylesheet (@stylesheets) {
2283                         next unless $stylesheet;
2284                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2285                 }
2286         }
2287         if (defined $project) {
2288                 printf('<link rel="alternate" title="%s log RSS feed" '.
2289                        'href="%s" type="application/rss+xml" />'."\n",
2290                        esc_param($project), href(action=>"rss"));
2291                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2292                        'href="%s" type="application/rss+xml" />'."\n",
2293                        esc_param($project), href(action=>"rss",
2294                                                  extra_options=>"--no-merges"));
2295                 printf('<link rel="alternate" title="%s log Atom feed" '.
2296                        'href="%s" type="application/atom+xml" />'."\n",
2297                        esc_param($project), href(action=>"atom"));
2298                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2299                        'href="%s" type="application/atom+xml" />'."\n",
2300                        esc_param($project), href(action=>"atom",
2301                                                  extra_options=>"--no-merges"));
2302         } else {
2303                 printf('<link rel="alternate" title="%s projects list" '.
2304                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2305                        $site_name, href(project=>undef, action=>"project_index"));
2306                 printf('<link rel="alternate" title="%s projects feeds" '.
2307                        'href="%s" type="text/x-opml"/>'."\n",
2308                        $site_name, href(project=>undef, action=>"opml"));
2309         }
2310         if (defined $favicon) {
2311                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2312         }
2313
2314         print "</head>\n" .
2315               "<body>\n";
2316
2317         if (-f $site_header) {
2318                 open (my $fd, $site_header);
2319                 print <$fd>;
2320                 close $fd;
2321         }
2322
2323         print "<div class=\"page_header\">\n" .
2324               $cgi->a({-href => esc_url($logo_url),
2325                        -title => $logo_label},
2326                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2327         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2328         if (defined $project) {
2329                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2330                 if (defined $action) {
2331                         print " / $action";
2332                 }
2333                 print "\n";
2334         }
2335         print "</div>\n";
2336
2337         my ($have_search) = gitweb_check_feature('search');
2338         if ((defined $project) && ($have_search)) {
2339                 if (!defined $searchtext) {
2340                         $searchtext = "";
2341                 }
2342                 my $search_hash;
2343                 if (defined $hash_base) {
2344                         $search_hash = $hash_base;
2345                 } elsif (defined $hash) {
2346                         $search_hash = $hash;
2347                 } else {
2348                         $search_hash = "HEAD";
2349                 }
2350                 my $action = $my_uri;
2351                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2352                 if ($use_pathinfo) {
2353                         $action .= "/$project";
2354                 } else {
2355                         $cgi->param("p", $project);
2356                 }
2357                 $cgi->param("a", "search");
2358                 $cgi->param("h", $search_hash);
2359                 print $cgi->startform(-method => "get", -action => $action) .
2360                       "<div class=\"search\">\n" .
2361                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2362                       $cgi->hidden(-name => "a") . "\n" .
2363                       $cgi->hidden(-name => "h") . "\n" .
2364                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2365                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2366                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2367                       " search:\n",
2368                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2369                       "</div>" .
2370                       $cgi->end_form() . "\n";
2371         }
2372 }
2373
2374 sub git_footer_html {
2375         print "<div class=\"page_footer\">\n";
2376         if (defined $project) {
2377                 my $descr = git_get_project_description($project);
2378                 if (defined $descr) {
2379                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2380                 }
2381                 print $cgi->a({-href => href(action=>"rss"),
2382                               -class => "rss_logo"}, "RSS") . " ";
2383                 print $cgi->a({-href => href(action=>"atom"),
2384                               -class => "rss_logo"}, "Atom") . "\n";
2385         } else {
2386                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2387                               -class => "rss_logo"}, "OPML") . " ";
2388                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2389                               -class => "rss_logo"}, "TXT") . "\n";
2390         }
2391         print "</div>\n" ;
2392
2393         if (-f $site_footer) {
2394                 open (my $fd, $site_footer);
2395                 print <$fd>;
2396                 close $fd;
2397         }
2398
2399         print "</body>\n" .
2400               "</html>";
2401 }
2402
2403 sub die_error {
2404         my $status = shift || "403 Forbidden";
2405         my $error = shift || "Malformed query, file missing or permission denied";
2406
2407         git_header_html($status);
2408         print <<EOF;
2409 <div class="page_body">
2410 <br /><br />
2411 $status - $error
2412 <br />
2413 </div>
2414 EOF
2415         git_footer_html();
2416         exit;
2417 }
2418
2419 ## ----------------------------------------------------------------------
2420 ## functions printing or outputting HTML: navigation
2421
2422 sub git_print_page_nav {
2423         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2424         $extra = '' if !defined $extra; # pager or formats
2425
2426         my @navs = qw(summary shortlog log commit commitdiff tree);
2427         if ($suppress) {
2428                 @navs = grep { $_ ne $suppress } @navs;
2429         }
2430
2431         my %arg = map { $_ => {action=>$_} } @navs;
2432         if (defined $head) {
2433                 for (qw(commit commitdiff)) {
2434                         $arg{$_}{'hash'} = $head;
2435                 }
2436                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2437                         for (qw(shortlog log)) {
2438                                 $arg{$_}{'hash'} = $head;
2439                         }
2440                 }
2441         }
2442         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2443         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2444
2445         print "<div class=\"page_nav\">\n" .
2446                 (join " | ",
2447                  map { $_ eq $current ?
2448                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2449                  } @navs);
2450         print "<br/>\n$extra<br/>\n" .
2451               "</div>\n";
2452 }
2453
2454 sub format_paging_nav {
2455         my ($action, $hash, $head, $page, $nrevs) = @_;
2456         my $paging_nav;
2457
2458
2459         if ($hash ne $head || $page) {
2460                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2461         } else {
2462                 $paging_nav .= "HEAD";
2463         }
2464
2465         if ($page > 0) {
2466                 $paging_nav .= " &sdot; " .
2467                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2468                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2469         } else {
2470                 $paging_nav .= " &sdot; prev";
2471         }
2472
2473         if ($nrevs >= (100 * ($page+1)-1)) {
2474                 $paging_nav .= " &sdot; " .
2475                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2476                                  -accesskey => "n", -title => "Alt-n"}, "next");
2477         } else {
2478                 $paging_nav .= " &sdot; next";
2479         }
2480
2481         return $paging_nav;
2482 }
2483
2484 ## ......................................................................
2485 ## functions printing or outputting HTML: div
2486
2487 sub git_print_header_div {
2488         my ($action, $title, $hash, $hash_base) = @_;
2489         my %args = ();
2490
2491         $args{'action'} = $action;
2492         $args{'hash'} = $hash if $hash;
2493         $args{'hash_base'} = $hash_base if $hash_base;
2494
2495         print "<div class=\"header\">\n" .
2496               $cgi->a({-href => href(%args), -class => "title"},
2497               $title ? $title : $action) .
2498               "\n</div>\n";
2499 }
2500
2501 #sub git_print_authorship (\%) {
2502 sub git_print_authorship {
2503         my $co = shift;
2504
2505         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2506         print "<div class=\"author_date\">" .
2507               esc_html($co->{'author_name'}) .
2508               " [$ad{'rfc2822'}";
2509         if ($ad{'hour_local'} < 6) {
2510                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2511                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2512         } else {
2513                 printf(" (%02d:%02d %s)",
2514                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2515         }
2516         print "]</div>\n";
2517 }
2518
2519 sub git_print_page_path {
2520         my $name = shift;
2521         my $type = shift;
2522         my $hb = shift;
2523
2524
2525         print "<div class=\"page_path\">";
2526         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2527                       -title => 'tree root'}, to_utf8("[$project]"));
2528         print " / ";
2529         if (defined $name) {
2530                 my @dirname = split '/', $name;
2531                 my $basename = pop @dirname;
2532                 my $fullname = '';
2533
2534                 foreach my $dir (@dirname) {
2535                         $fullname .= ($fullname ? '/' : '') . $dir;
2536                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2537                                                      hash_base=>$hb),
2538                                       -title => $fullname}, esc_path($dir));
2539                         print " / ";
2540                 }
2541                 if (defined $type && $type eq 'blob') {
2542                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2543                                                      hash_base=>$hb),
2544                                       -title => $name}, esc_path($basename));
2545                 } elsif (defined $type && $type eq 'tree') {
2546                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2547                                                      hash_base=>$hb),
2548                                       -title => $name}, esc_path($basename));
2549                         print " / ";
2550                 } else {
2551                         print esc_path($basename);
2552                 }
2553         }
2554         print "<br/></div>\n";
2555 }
2556
2557 # sub git_print_log (\@;%) {
2558 sub git_print_log ($;%) {
2559         my $log = shift;
2560         my %opts = @_;
2561
2562         if ($opts{'-remove_title'}) {
2563                 # remove title, i.e. first line of log
2564                 shift @$log;
2565         }
2566         # remove leading empty lines
2567         while (defined $log->[0] && $log->[0] eq "") {
2568                 shift @$log;
2569         }
2570
2571         # print log
2572         my $signoff = 0;
2573         my $empty = 0;
2574         foreach my $line (@$log) {
2575                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2576                         $signoff = 1;
2577                         $empty = 0;
2578                         if (! $opts{'-remove_signoff'}) {
2579                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2580                                 next;
2581                         } else {
2582                                 # remove signoff lines
2583                                 next;
2584                         }
2585                 } else {
2586                         $signoff = 0;
2587                 }
2588
2589                 # print only one empty line
2590                 # do not print empty line after signoff
2591                 if ($line eq "") {
2592                         next if ($empty || $signoff);
2593                         $empty = 1;
2594                 } else {
2595                         $empty = 0;
2596                 }
2597
2598                 print format_log_line_html($line) . "<br/>\n";
2599         }
2600
2601         if ($opts{'-final_empty_line'}) {
2602                 # end with single empty line
2603                 print "<br/>\n" unless $empty;
2604         }
2605 }
2606
2607 # return link target (what link points to)
2608 sub git_get_link_target {
2609         my $hash = shift;
2610         my $link_target;
2611
2612         # read link
2613         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2614                 or return;
2615         {
2616                 local $/;
2617                 $link_target = <$fd>;
2618         }
2619         close $fd
2620                 or return;
2621
2622         return $link_target;
2623 }
2624
2625 # given link target, and the directory (basedir) the link is in,
2626 # return target of link relative to top directory (top tree);
2627 # return undef if it is not possible (including absolute links).
2628 sub normalize_link_target {
2629         my ($link_target, $basedir, $hash_base) = @_;
2630
2631         # we can normalize symlink target only if $hash_base is provided
2632         return unless $hash_base;
2633
2634         # absolute symlinks (beginning with '/') cannot be normalized
2635         return if (substr($link_target, 0, 1) eq '/');
2636
2637         # normalize link target to path from top (root) tree (dir)
2638         my $path;
2639         if ($basedir) {
2640                 $path = $basedir . '/' . $link_target;
2641         } else {
2642                 # we are in top (root) tree (dir)
2643                 $path = $link_target;
2644         }
2645
2646         # remove //, /./, and /../
2647         my @path_parts;
2648         foreach my $part (split('/', $path)) {
2649                 # discard '.' and ''
2650                 next if (!$part || $part eq '.');
2651                 # handle '..'
2652                 if ($part eq '..') {
2653                         if (@path_parts) {
2654                                 pop @path_parts;
2655                         } else {
2656                                 # link leads outside repository (outside top dir)
2657                                 return;
2658                         }
2659                 } else {
2660                         push @path_parts, $part;
2661                 }
2662         }
2663         $path = join('/', @path_parts);
2664
2665         return $path;
2666 }
2667
2668 # print tree entry (row of git_tree), but without encompassing <tr> element
2669 sub git_print_tree_entry {
2670         my ($t, $basedir, $hash_base, $have_blame) = @_;
2671
2672         my %base_key = ();
2673         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2674
2675         # The format of a table row is: mode list link.  Where mode is
2676         # the mode of the entry, list is the name of the entry, an href,
2677         # and link is the action links of the entry.
2678
2679         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2680         if ($t->{'type'} eq "blob") {
2681                 print "<td class=\"list\">" .
2682                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2683                                                file_name=>"$basedir$t->{'name'}", %base_key),
2684                                 -class => "list"}, esc_path($t->{'name'}));
2685                 if (S_ISLNK(oct $t->{'mode'})) {
2686                         my $link_target = git_get_link_target($t->{'hash'});
2687                         if ($link_target) {
2688                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2689                                 if (defined $norm_target) {
2690                                         print " -> " .
2691                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2692                                                                      file_name=>$norm_target),
2693                                                        -title => $norm_target}, esc_path($link_target));
2694                                 } else {
2695                                         print " -> " . esc_path($link_target);
2696                                 }
2697                         }
2698                 }
2699                 print "</td>\n";
2700                 print "<td class=\"link\">";
2701                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2702                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2703                               "blob");
2704                 if ($have_blame) {
2705                         print " | " .
2706                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2707                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2708                                       "blame");
2709                 }
2710                 if (defined $hash_base) {
2711                         print " | " .
2712                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2713                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2714                                       "history");
2715                 }
2716                 print " | " .
2717                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2718                                                file_name=>"$basedir$t->{'name'}")},
2719                                 "raw");
2720                 print "</td>\n";
2721
2722         } elsif ($t->{'type'} eq "tree") {
2723                 print "<td class=\"list\">";
2724                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2725                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2726                               esc_path($t->{'name'}));
2727                 print "</td>\n";
2728                 print "<td class=\"link\">";
2729                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2730                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2731                               "tree");
2732                 if (defined $hash_base) {
2733                         print " | " .
2734                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2735                                                      file_name=>"$basedir$t->{'name'}")},
2736                                       "history");
2737                 }
2738                 print "</td>\n";
2739         } else {
2740                 # unknown object: we can only present history for it
2741                 # (this includes 'commit' object, i.e. submodule support)
2742                 print "<td class=\"list\">" .
2743                       esc_path($t->{'name'}) .
2744                       "</td>\n";
2745                 print "<td class=\"link\">";
2746                 if (defined $hash_base) {
2747                         print $cgi->a({-href => href(action=>"history",
2748                                                      hash_base=>$hash_base,
2749                                                      file_name=>"$basedir$t->{'name'}")},
2750                                       "history");
2751                 }
2752                 print "</td>\n";
2753         }
2754 }
2755
2756 ## ......................................................................
2757 ## functions printing large fragments of HTML
2758
2759 sub fill_from_file_info {
2760         my ($diff, @parents) = @_;
2761
2762         $diff->{'from_file'} = [ ];
2763         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2764         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2765                 if ($diff->{'status'}[$i] eq 'R' ||
2766                     $diff->{'status'}[$i] eq 'C') {
2767                         $diff->{'from_file'}[$i] =
2768                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2769                 }
2770         }
2771
2772         return $diff;
2773 }
2774
2775 # parameters can be strings, or references to arrays of strings
2776 sub from_ids_eq {
2777         my ($a, $b) = @_;
2778
2779         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2780                 for (my $i = 0; $i < @$a; ++$i) {
2781                         return 0 unless ($a->[$i] eq $b->[$i]);
2782                 }
2783                 return 1;
2784         } elsif (!ref($a) && !ref($b)) {
2785                 return $a eq $b;
2786         } else {
2787                 return 0;
2788         }
2789 }
2790
2791 sub is_deleted {
2792         my $diffinfo = shift;
2793
2794         return $diffinfo->{'to_id'} eq ('0' x 40);
2795 }
2796
2797 sub git_difftree_body {
2798         my ($difftree, $hash, @parents) = @_;
2799         my ($parent) = $parents[0];
2800         my ($have_blame) = gitweb_check_feature('blame');
2801         print "<div class=\"list_head\">\n";
2802         if ($#{$difftree} > 10) {
2803                 print(($#{$difftree} + 1) . " files changed:\n");
2804         }
2805         print "</div>\n";
2806
2807         print "<table class=\"" .
2808               (@parents > 1 ? "combined " : "") .
2809               "diff_tree\">\n";
2810
2811         # header only for combined diff in 'commitdiff' view
2812         my $has_header = @parents > 1 && $action eq 'commitdiff';
2813         if ($has_header) {
2814                 # table header
2815                 print "<thead><tr>\n" .
2816                        "<th></th><th></th>\n"; # filename, patchN link
2817                 for (my $i = 0; $i < @parents; $i++) {
2818                         my $par = $parents[$i];
2819                         print "<th>" .
2820                               $cgi->a({-href => href(action=>"commitdiff",
2821                                                      hash=>$hash, hash_parent=>$par),
2822                                        -title => 'commitdiff to parent number ' .
2823                                                   ($i+1) . ': ' . substr($par,0,7)},
2824                                       $i+1) .
2825                               "&nbsp;</th>\n";
2826                 }
2827                 print "</tr></thead>\n<tbody>\n";
2828         }
2829
2830         my $alternate = 1;
2831         my $patchno = 0;
2832         foreach my $line (@{$difftree}) {
2833                 my $diff;
2834                 if (ref($line) eq "HASH") {
2835                         # pre-parsed (or generated by hand)
2836                         $diff = $line;
2837                 } else {
2838                         $diff = parse_difftree_raw_line($line);
2839                 }
2840
2841                 if ($alternate) {
2842                         print "<tr class=\"dark\">\n";
2843                 } else {
2844                         print "<tr class=\"light\">\n";
2845                 }
2846                 $alternate ^= 1;
2847
2848                 if (exists $diff->{'nparents'}) { # combined diff
2849
2850                         fill_from_file_info($diff, @parents)
2851                                 unless exists $diff->{'from_file'};
2852
2853                         if (!is_deleted($diff)) {
2854                                 # file exists in the result (child) commit
2855                                 print "<td>" .
2856                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2857                                                              file_name=>$diff->{'to_file'},
2858                                                              hash_base=>$hash),
2859                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2860                                       "</td>\n";
2861                         } else {
2862                                 print "<td>" .
2863                                       esc_path($diff->{'to_file'}) .
2864                                       "</td>\n";
2865                         }
2866
2867                         if ($action eq 'commitdiff') {
2868                                 # link to patch
2869                                 $patchno++;
2870                                 print "<td class=\"link\">" .
2871                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2872                                       " | " .
2873                                       "</td>\n";
2874                         }
2875
2876                         my $has_history = 0;
2877                         my $not_deleted = 0;
2878                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2879                                 my $hash_parent = $parents[$i];
2880                                 my $from_hash = $diff->{'from_id'}[$i];
2881                                 my $from_path = $diff->{'from_file'}[$i];
2882                                 my $status = $diff->{'status'}[$i];
2883
2884                                 $has_history ||= ($status ne 'A');
2885                                 $not_deleted ||= ($status ne 'D');
2886
2887                                 if ($status eq 'A') {
2888                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2889                                 } elsif ($status eq 'D') {
2890                                         print "<td class=\"link\">" .
2891                                               $cgi->a({-href => href(action=>"blob",
2892                                                                      hash_base=>$hash,
2893                                                                      hash=>$from_hash,
2894                                                                      file_name=>$from_path)},
2895                                                       "blob" . ($i+1)) .
2896                                               " | </td>\n";
2897                                 } else {
2898                                         if ($diff->{'to_id'} eq $from_hash) {
2899                                                 print "<td class=\"link nochange\">";
2900                                         } else {
2901                                                 print "<td class=\"link\">";
2902                                         }
2903                                         print $cgi->a({-href => href(action=>"blobdiff",
2904                                                                      hash=>$diff->{'to_id'},
2905                                                                      hash_parent=>$from_hash,
2906                                                                      hash_base=>$hash,
2907                                                                      hash_parent_base=>$hash_parent,
2908                                                                      file_name=>$diff->{'to_file'},
2909                                                                      file_parent=>$from_path)},
2910                                                       "diff" . ($i+1)) .
2911                                               " | </td>\n";
2912                                 }
2913                         }
2914
2915                         print "<td class=\"link\">";
2916                         if ($not_deleted) {
2917                                 print $cgi->a({-href => href(action=>"blob",
2918                                                              hash=>$diff->{'to_id'},
2919                                                              file_name=>$diff->{'to_file'},
2920                                                              hash_base=>$hash)},
2921                                               "blob");
2922                                 print " | " if ($has_history);
2923                         }
2924                         if ($has_history) {
2925                                 print $cgi->a({-href => href(action=>"history",
2926                                                              file_name=>$diff->{'to_file'},
2927                                                              hash_base=>$hash)},
2928                                               "history");
2929                         }
2930                         print "</td>\n";
2931
2932                         print "</tr>\n";
2933                         next; # instead of 'else' clause, to avoid extra indent
2934                 }
2935                 # else ordinary diff
2936
2937                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2938                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2939                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2940                         $to_mode_oct = oct $diff->{'to_mode'};
2941                         if (S_ISREG($to_mode_oct)) { # only for regular file
2942                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2943                         }
2944                         $to_file_type = file_type($diff->{'to_mode'});
2945                 }
2946                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2947                         $from_mode_oct = oct $diff->{'from_mode'};
2948                         if (S_ISREG($to_mode_oct)) { # only for regular file
2949                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2950                         }
2951                         $from_file_type = file_type($diff->{'from_mode'});
2952                 }
2953
2954                 if ($diff->{'status'} eq "A") { # created
2955                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2956                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2957                         $mode_chng   .= "]</span>";
2958                         print "<td>";
2959                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2960                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2961                                       -class => "list"}, esc_path($diff->{'file'}));
2962                         print "</td>\n";
2963                         print "<td>$mode_chng</td>\n";
2964                         print "<td class=\"link\">";
2965                         if ($action eq 'commitdiff') {
2966                                 # link to patch
2967                                 $patchno++;
2968                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2969                                 print " | ";
2970                         }
2971                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2972                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2973                                       "blob");
2974                         print "</td>\n";
2975
2976                 } elsif ($diff->{'status'} eq "D") { # deleted
2977                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2978                         print "<td>";
2979                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2980                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2981                                        -class => "list"}, esc_path($diff->{'file'}));
2982                         print "</td>\n";
2983                         print "<td>$mode_chng</td>\n";
2984                         print "<td class=\"link\">";
2985                         if ($action eq 'commitdiff') {
2986                                 # link to patch
2987                                 $patchno++;
2988                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2989                                 print " | ";
2990                         }
2991                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2992                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2993                                       "blob") . " | ";
2994                         if ($have_blame) {
2995                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
2996                                                              file_name=>$diff->{'file'})},
2997                                               "blame") . " | ";
2998                         }
2999                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3000                                                      file_name=>$diff->{'file'})},
3001                                       "history");
3002                         print "</td>\n";
3003
3004                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3005                         my $mode_chnge = "";
3006                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3007                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3008                                 if ($from_file_type ne $to_file_type) {
3009                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3010                                 }
3011                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3012                                         if ($from_mode_str && $to_mode_str) {
3013                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3014                                         } elsif ($to_mode_str) {
3015                                                 $mode_chnge .= " mode: $to_mode_str";
3016                                         }
3017                                 }
3018                                 $mode_chnge .= "]</span>\n";
3019                         }
3020                         print "<td>";
3021                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3022                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3023                                       -class => "list"}, esc_path($diff->{'file'}));
3024                         print "</td>\n";
3025                         print "<td>$mode_chnge</td>\n";
3026                         print "<td class=\"link\">";
3027                         if ($action eq 'commitdiff') {
3028                                 # link to patch
3029                                 $patchno++;
3030                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3031                                       " | ";
3032                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3033                                 # "commit" view and modified file (not onlu mode changed)
3034                                 print $cgi->a({-href => href(action=>"blobdiff",
3035                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3036                                                              hash_base=>$hash, hash_parent_base=>$parent,
3037                                                              file_name=>$diff->{'file'})},
3038                                               "diff") .
3039                                       " | ";
3040                         }
3041                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3042                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3043                                        "blob") . " | ";
3044                         if ($have_blame) {
3045                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3046                                                              file_name=>$diff->{'file'})},
3047                                               "blame") . " | ";
3048                         }
3049                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3050                                                      file_name=>$diff->{'file'})},
3051                                       "history");
3052                         print "</td>\n";
3053
3054                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3055                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3056                         my $nstatus = $status_name{$diff->{'status'}};
3057                         my $mode_chng = "";
3058                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3059                                 # mode also for directories, so we cannot use $to_mode_str
3060                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3061                         }
3062                         print "<td>" .
3063                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3064                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3065                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3066                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3067                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3068                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3069                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3070                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3071                               "<td class=\"link\">";
3072                         if ($action eq 'commitdiff') {
3073                                 # link to patch
3074                                 $patchno++;
3075                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3076                                       " | ";
3077                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3078                                 # "commit" view and modified file (not only pure rename or copy)
3079                                 print $cgi->a({-href => href(action=>"blobdiff",
3080                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3081                                                              hash_base=>$hash, hash_parent_base=>$parent,
3082                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3083                                               "diff") .
3084                                       " | ";
3085                         }
3086                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3087                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3088                                       "blob") . " | ";
3089                         if ($have_blame) {
3090                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3091                                                              file_name=>$diff->{'to_file'})},
3092                                               "blame") . " | ";
3093                         }
3094                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3095                                                     file_name=>$diff->{'to_file'})},
3096                                       "history");
3097                         print "</td>\n";
3098
3099                 } # we should not encounter Unmerged (U) or Unknown (X) status
3100                 print "</tr>\n";
3101         }
3102         print "</tbody>" if $has_header;
3103         print "</table>\n";
3104 }
3105
3106 sub git_patchset_body {
3107         my ($fd, $difftree, $hash, @hash_parents) = @_;
3108         my ($hash_parent) = $hash_parents[0];
3109
3110         my $patch_idx = 0;
3111         my $patch_number = 0;
3112         my $patch_line;
3113         my $diffinfo;
3114         my (%from, %to);
3115
3116         print "<div class=\"patchset\">\n";
3117
3118         # skip to first patch
3119         while ($patch_line = <$fd>) {
3120                 chomp $patch_line;
3121
3122                 last if ($patch_line =~ m/^diff /);
3123         }
3124
3125  PATCH:
3126         while ($patch_line) {
3127                 my @diff_header;
3128                 my ($from_id, $to_id);
3129
3130                 # git diff header
3131                 #assert($patch_line =~ m/^diff /) if DEBUG;
3132                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3133                 $patch_number++;
3134                 push @diff_header, $patch_line;
3135
3136                 # extended diff header
3137         EXTENDED_HEADER:
3138                 while ($patch_line = <$fd>) {
3139                         chomp $patch_line;
3140
3141                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3142
3143                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3144                                 $from_id = $1;
3145                                 $to_id   = $2;
3146                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3147                                 $from_id = [ split(',', $1) ];
3148                                 $to_id   = $2;
3149                         }
3150
3151                         push @diff_header, $patch_line;
3152                 }
3153                 my $last_patch_line = $patch_line;
3154
3155                 # check if current patch belong to current raw line
3156                 # and parse raw git-diff line if needed
3157                 if (defined $diffinfo &&
3158                     defined $from_id && defined $to_id &&
3159                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3160                     $diffinfo->{'to_id'} eq $to_id) {
3161                         # this is continuation of a split patch
3162                         print "<div class=\"patch cont\">\n";
3163                 } else {
3164                         # advance raw git-diff output if needed
3165                         $patch_idx++ if defined $diffinfo;
3166
3167                         # compact combined diff output can have some patches skipped
3168                         # find which patch (using pathname of result) we are at now
3169                         my $to_name;
3170                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3171                                 $to_name = $1;
3172                         }
3173
3174                         do {
3175                                 # read and prepare patch information
3176                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3177                                         # pre-parsed (or generated by hand)
3178                                         $diffinfo = $difftree->[$patch_idx];
3179                                 } else {
3180                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3181                                 }
3182
3183                                 # check if current raw line has no patch (it got simplified)
3184                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3185                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3186                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3187                                               "</div>\n";  # class="patch"
3188
3189                                         $patch_idx++;
3190                                         $patch_number++;
3191                                 }
3192                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3193                                  $patch_idx > $#$difftree);
3194                         # modifies %from, %to hashes
3195                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3196                         if ($diffinfo->{'nparents'}) {
3197                                 # combined diff
3198                                 $from{'file'} = [];
3199                                 $from{'href'} = [];
3200                                 fill_from_file_info($diffinfo, @hash_parents)
3201                                         unless exists $diffinfo->{'from_file'};
3202                                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3203                                         $from{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
3204                                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3205                                                 $from{'href'}[$i] = href(action=>"blob",
3206                                                                          hash_base=>$hash_parents[$i],
3207                                                                          hash=>$diffinfo->{'from_id'}[$i],
3208                                                                          file_name=>$from{'file'}[$i]);
3209                                         } else {
3210                                                 $from{'href'}[$i] = undef;
3211                                         }
3212                                 }
3213                         } else {
3214                                 $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
3215                                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3216                                         $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3217                                                              hash=>$diffinfo->{'from_id'},
3218                                                              file_name=>$from{'file'});
3219                                 } else {
3220                                         delete $from{'href'};
3221                                 }
3222                         }
3223
3224                         $to{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
3225                         if (!is_deleted($diffinfo)) { # file exists in result
3226                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
3227                                                    hash=>$diffinfo->{'to_id'},
3228                                                    file_name=>$to{'file'});
3229                         } else {
3230                                 delete $to{'href'};
3231                         }
3232                         # this is first patch for raw difftree line with $patch_idx index
3233                         # we index @$difftree array from 0, but number patches from 1
3234                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3235                 }
3236
3237                 # print "git diff" header
3238                 $patch_line = shift @diff_header;
3239                 print format_git_diff_header_line($patch_line, $diffinfo,
3240                                                   \%from, \%to);
3241
3242                 # print extended diff header
3243                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3244         EXTENDED_HEADER:
3245                 foreach $patch_line (@diff_header) {
3246                         print format_extended_diff_header_line($patch_line, $diffinfo,
3247                                                                \%from, \%to);
3248                 }
3249                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3250
3251                 # from-file/to-file diff header
3252                 $patch_line = $last_patch_line;
3253                 if (! $patch_line) {
3254                         print "</div>\n"; # class="patch"
3255                         last PATCH;
3256                 }
3257                 next PATCH if ($patch_line =~ m/^diff /);
3258                 #assert($patch_line =~ m/^---/) if DEBUG;
3259                 #assert($patch_line eq $last_patch_line) if DEBUG;
3260
3261                 $patch_line = <$fd>;
3262                 chomp $patch_line;
3263                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3264
3265                 print format_diff_from_to_header($last_patch_line, $patch_line,
3266                                                  $diffinfo, \%from, \%to,
3267                                                  @hash_parents);
3268
3269                 # the patch itself
3270         LINE:
3271                 while ($patch_line = <$fd>) {
3272                         chomp $patch_line;
3273
3274                         next PATCH if ($patch_line =~ m/^diff /);
3275
3276                         print format_diff_line($patch_line, \%from, \%to);
3277                 }
3278
3279         } continue {
3280                 print "</div>\n"; # class="patch"
3281         }
3282
3283         # for compact combined (--cc) format, with chunk and patch simpliciaction
3284         # patchset might be empty, but there might be unprocessed raw lines
3285         for ($patch_idx++ if $patch_number > 0;
3286              $patch_idx < @$difftree;
3287              $patch_idx++) {
3288                 # read and prepare patch information
3289                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3290                         # pre-parsed (or generated by hand)
3291                         $diffinfo = $difftree->[$patch_idx];
3292                 } else {
3293                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3294                 }
3295
3296                 # generate anchor for "patch" links in difftree / whatchanged part
3297                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3298                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3299                       "</div>\n";  # class="patch"
3300
3301                 $patch_number++;
3302         }
3303
3304         if ($patch_number == 0) {
3305                 if (@hash_parents > 1) {
3306                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3307                 } else {
3308                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3309                 }
3310         }
3311
3312         print "</div>\n"; # class="patchset"
3313 }
3314
3315 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3316
3317 sub git_project_list_body {
3318         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3319
3320         my ($check_forks) = gitweb_check_feature('forks');
3321
3322         my @projects;
3323         foreach my $pr (@$projlist) {
3324                 my (@aa) = git_get_last_activity($pr->{'path'});
3325                 unless (@aa) {
3326                         next;
3327                 }
3328                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3329                 if (!defined $pr->{'descr'}) {
3330                         my $descr = git_get_project_description($pr->{'path'}) || "";
3331                         $pr->{'descr_long'} = to_utf8($descr);
3332                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3333                 }
3334                 if (!defined $pr->{'owner'}) {
3335                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3336                 }
3337                 if ($check_forks) {
3338                         my $pname = $pr->{'path'};
3339                         if (($pname =~ s/\.git$//) &&
3340                             ($pname !~ /\/$/) &&
3341                             (-d "$projectroot/$pname")) {
3342                                 $pr->{'forks'} = "-d $projectroot/$pname";
3343                         }
3344                         else {
3345                                 $pr->{'forks'} = 0;
3346                         }
3347                 }
3348                 push @projects, $pr;
3349         }
3350
3351         $order ||= $default_projects_order;
3352         $from = 0 unless defined $from;
3353         $to = $#projects if (!defined $to || $#projects < $to);
3354
3355         print "<table class=\"project_list\">\n";
3356         unless ($no_header) {
3357                 print "<tr>\n";
3358                 if ($check_forks) {
3359                         print "<th></th>\n";
3360                 }
3361                 if ($order eq "project") {
3362                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3363                         print "<th>Project</th>\n";
3364                 } else {
3365                         print "<th>" .
3366                               $cgi->a({-href => href(project=>undef, order=>'project'),
3367                                        -class => "header"}, "Project") .
3368                               "</th>\n";
3369                 }
3370                 if ($order eq "descr") {
3371                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3372                         print "<th>Description</th>\n";
3373                 } else {
3374                         print "<th>" .
3375                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3376                                        -class => "header"}, "Description") .
3377                               "</th>\n";
3378                 }
3379                 if ($order eq "owner") {
3380                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3381                         print "<th>Owner</th>\n";
3382                 } else {
3383                         print "<th>" .
3384                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3385                                        -class => "header"}, "Owner") .
3386                               "</th>\n";
3387                 }
3388                 if ($order eq "age") {
3389                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3390                         print "<th>Last Change</th>\n";
3391                 } else {
3392                         print "<th>" .
3393                               $cgi->a({-href => href(project=>undef, order=>'age'),
3394                                        -class => "header"}, "Last Change") .
3395                               "</th>\n";
3396                 }
3397                 print "<th></th>\n" .
3398                       "</tr>\n";
3399         }
3400         my $alternate = 1;
3401         for (my $i = $from; $i <= $to; $i++) {
3402                 my $pr = $projects[$i];
3403                 if ($alternate) {
3404                         print "<tr class=\"dark\">\n";
3405                 } else {
3406                         print "<tr class=\"light\">\n";
3407                 }
3408                 $alternate ^= 1;
3409                 if ($check_forks) {
3410                         print "<td>";
3411                         if ($pr->{'forks'}) {
3412                                 print "<!-- $pr->{'forks'} -->\n";
3413                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3414                         }
3415                         print "</td>\n";
3416                 }
3417                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3418                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3419                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3420                                         -class => "list", -title => $pr->{'descr_long'}},
3421                                         esc_html($pr->{'descr'})) . "</td>\n" .
3422                       "<td><i>" . esc_html(chop_str($pr->{'owner'}, 15)) . "</i></td>\n";
3423                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3424                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3425                       "<td class=\"link\">" .
3426                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3427                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3428                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3429                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3430                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3431                       "</td>\n" .
3432                       "</tr>\n";
3433         }
3434         if (defined $extra) {
3435                 print "<tr>\n";
3436                 if ($check_forks) {
3437                         print "<td></td>\n";
3438                 }
3439                 print "<td colspan=\"5\">$extra</td>\n" .
3440                       "</tr>\n";
3441         }
3442         print "</table>\n";
3443 }
3444
3445 sub git_shortlog_body {
3446         # uses global variable $project
3447         my ($commitlist, $from, $to, $refs, $extra) = @_;
3448
3449         $from = 0 unless defined $from;
3450         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3451
3452         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3453         my $alternate = 1;
3454         for (my $i = $from; $i <= $to; $i++) {
3455                 my %co = %{$commitlist->[$i]};
3456                 my $commit = $co{'id'};
3457                 my $ref = format_ref_marker($refs, $commit);
3458                 if ($alternate) {
3459                         print "<tr class=\"dark\">\n";
3460                 } else {
3461                         print "<tr class=\"light\">\n";
3462                 }
3463                 $alternate ^= 1;
3464                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3465                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3466                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3467                       "<td>";
3468                 print format_subject_html($co{'title'}, $co{'title_short'},
3469                                           href(action=>"commit", hash=>$commit), $ref);
3470                 print "</td>\n" .
3471                       "<td class=\"link\">" .
3472                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3473                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3474                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3475                 my $snapshot_links = format_snapshot_links($commit);
3476                 if (defined $snapshot_links) {
3477                         print " | " . $snapshot_links;
3478                 }
3479                 print "</td>\n" .
3480                       "</tr>\n";
3481         }
3482         if (defined $extra) {
3483                 print "<tr>\n" .
3484                       "<td colspan=\"4\">$extra</td>\n" .
3485                       "</tr>\n";
3486         }
3487         print "</table>\n";
3488 }
3489
3490 sub git_history_body {
3491         # Warning: assumes constant type (blob or tree) during history
3492         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3493
3494         $from = 0 unless defined $from;
3495         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3496
3497         print "<table class=\"history\" cellspacing=\"0\">\n";
3498         my $alternate = 1;
3499         for (my $i = $from; $i <= $to; $i++) {
3500                 my %co = %{$commitlist->[$i]};
3501                 if (!%co) {
3502                         next;
3503                 }
3504                 my $commit = $co{'id'};
3505
3506                 my $ref = format_ref_marker($refs, $commit);
3507
3508                 if ($alternate) {
3509                         print "<tr class=\"dark\">\n";
3510                 } else {
3511                         print "<tr class=\"light\">\n";
3512                 }
3513                 $alternate ^= 1;
3514                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3515                       # shortlog uses      chop_str($co{'author_name'}, 10)
3516                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3517                       "<td>";
3518                 # originally git_history used chop_str($co{'title'}, 50)
3519                 print format_subject_html($co{'title'}, $co{'title_short'},
3520                                           href(action=>"commit", hash=>$commit), $ref);
3521                 print "</td>\n" .
3522                       "<td class=\"link\">" .
3523                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3524                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3525
3526                 if ($ftype eq 'blob') {
3527                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3528                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3529                         if (defined $blob_current && defined $blob_parent &&
3530                                         $blob_current ne $blob_parent) {
3531                                 print " | " .
3532                                         $cgi->a({-href => href(action=>"blobdiff",
3533                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3534                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3535                                                                file_name=>$file_name)},
3536                                                 "diff to current");
3537                         }
3538                 }
3539                 print "</td>\n" .
3540                       "</tr>\n";
3541         }
3542         if (defined $extra) {
3543                 print "<tr>\n" .
3544                       "<td colspan=\"4\">$extra</td>\n" .
3545                       "</tr>\n";
3546         }
3547         print "</table>\n";
3548 }
3549
3550 sub git_tags_body {
3551         # uses global variable $project
3552         my ($taglist, $from, $to, $extra) = @_;
3553         $from = 0 unless defined $from;
3554         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3555
3556         print "<table class=\"tags\" cellspacing=\"0\">\n";
3557         my $alternate = 1;
3558         for (my $i = $from; $i <= $to; $i++) {
3559                 my $entry = $taglist->[$i];
3560                 my %tag = %$entry;
3561                 my $comment = $tag{'subject'};
3562                 my $comment_short;
3563                 if (defined $comment) {
3564                         $comment_short = chop_str($comment, 30, 5);
3565                 }
3566                 if ($alternate) {
3567                         print "<tr class=\"dark\">\n";
3568                 } else {
3569                         print "<tr class=\"light\">\n";
3570                 }
3571                 $alternate ^= 1;
3572                 if (defined $tag{'age'}) {
3573                         print "<td><i>$tag{'age'}</i></td>\n";
3574                 } else {
3575                         print "<td></td>\n";
3576                 }
3577                 print "<td>" .
3578                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3579                                -class => "list name"}, esc_html($tag{'name'})) .
3580                       "</td>\n" .
3581                       "<td>";
3582                 if (defined $comment) {
3583                         print format_subject_html($comment, $comment_short,
3584                                                   href(action=>"tag", hash=>$tag{'id'}));
3585                 }
3586                 print "</td>\n" .
3587                       "<td class=\"selflink\">";
3588                 if ($tag{'type'} eq "tag") {
3589                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3590                 } else {
3591                         print "&nbsp;";
3592                 }
3593                 print "</td>\n" .
3594                       "<td class=\"link\">" . " | " .
3595                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3596                 if ($tag{'reftype'} eq "commit") {
3597                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3598                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3599                 } elsif ($tag{'reftype'} eq "blob") {
3600                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3601                 }
3602                 print "</td>\n" .
3603                       "</tr>";
3604         }
3605         if (defined $extra) {
3606                 print "<tr>\n" .
3607                       "<td colspan=\"5\">$extra</td>\n" .
3608                       "</tr>\n";
3609         }
3610         print "</table>\n";
3611 }
3612
3613 sub git_heads_body {
3614         # uses global variable $project
3615         my ($headlist, $head, $from, $to, $extra) = @_;
3616         $from = 0 unless defined $from;
3617         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3618
3619         print "<table class=\"heads\" cellspacing=\"0\">\n";
3620         my $alternate = 1;
3621         for (my $i = $from; $i <= $to; $i++) {
3622                 my $entry = $headlist->[$i];
3623                 my %ref = %$entry;
3624                 my $curr = $ref{'id'} eq $head;
3625                 if ($alternate) {
3626                         print "<tr class=\"dark\">\n";
3627                 } else {
3628                         print "<tr class=\"light\">\n";
3629                 }
3630                 $alternate ^= 1;
3631                 print "<td><i>$ref{'age'}</i></td>\n" .
3632                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3633                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3634                                -class => "list name"},esc_html($ref{'name'})) .
3635                       "</td>\n" .
3636                       "<td class=\"link\">" .
3637                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3638                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3639                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3640                       "</td>\n" .
3641                       "</tr>";
3642         }
3643         if (defined $extra) {
3644                 print "<tr>\n" .
3645                       "<td colspan=\"3\">$extra</td>\n" .
3646                       "</tr>\n";
3647         }
3648         print "</table>\n";
3649 }
3650
3651 sub git_search_grep_body {
3652         my ($commitlist, $from, $to, $extra) = @_;
3653         $from = 0 unless defined $from;
3654         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3655
3656         print "<table class=\"grep\" cellspacing=\"0\">\n";
3657         my $alternate = 1;
3658         for (my $i = $from; $i <= $to; $i++) {
3659                 my %co = %{$commitlist->[$i]};
3660                 if (!%co) {
3661                         next;
3662                 }
3663                 my $commit = $co{'id'};
3664                 if ($alternate) {
3665                         print "<tr class=\"dark\">\n";
3666                 } else {
3667                         print "<tr class=\"light\">\n";
3668                 }
3669                 $alternate ^= 1;
3670                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3671                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3672                       "<td>" .
3673                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3674                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3675                 my $comment = $co{'comment'};
3676                 foreach my $line (@$comment) {
3677                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3678                                 my $lead = esc_html($1) || "";
3679                                 $lead = chop_str($lead, 30, 10);
3680                                 my $match = esc_html($2) || "";
3681                                 my $trail = esc_html($3) || "";
3682                                 $trail = chop_str($trail, 30, 10);
3683                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3684                                 print chop_str($text, 80, 5) . "<br/>\n";
3685                         }
3686                 }
3687                 print "</td>\n" .
3688                       "<td class=\"link\">" .
3689                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3690                       " | " .
3691                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3692                 print "</td>\n" .
3693                       "</tr>\n";
3694         }
3695         if (defined $extra) {
3696                 print "<tr>\n" .
3697                       "<td colspan=\"3\">$extra</td>\n" .
3698                       "</tr>\n";
3699         }
3700         print "</table>\n";
3701 }
3702
3703 ## ======================================================================
3704 ## ======================================================================
3705 ## actions
3706
3707 sub git_project_list {
3708         my $order = $cgi->param('o');
3709         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3710                 die_error(undef, "Unknown order parameter");
3711         }
3712
3713         my @list = git_get_projects_list();
3714         if (!@list) {
3715                 die_error(undef, "No projects found");
3716         }
3717
3718         git_header_html();
3719         if (-f $home_text) {
3720                 print "<div class=\"index_include\">\n";
3721                 open (my $fd, $home_text);
3722                 print <$fd>;
3723                 close $fd;
3724                 print "</div>\n";
3725         }
3726         git_project_list_body(\@list, $order);
3727         git_footer_html();
3728 }
3729
3730 sub git_forks {
3731         my $order = $cgi->param('o');
3732         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3733                 die_error(undef, "Unknown order parameter");
3734         }
3735
3736         my @list = git_get_projects_list($project);
3737         if (!@list) {
3738                 die_error(undef, "No forks found");
3739         }
3740
3741         git_header_html();
3742         git_print_page_nav('','');
3743         git_print_header_div('summary', "$project forks");
3744         git_project_list_body(\@list, $order);
3745         git_footer_html();
3746 }
3747
3748 sub git_project_index {
3749         my @projects = git_get_projects_list($project);
3750
3751         print $cgi->header(
3752                 -type => 'text/plain',
3753                 -charset => 'utf-8',
3754                 -content_disposition => 'inline; filename="index.aux"');
3755
3756         foreach my $pr (@projects) {
3757                 if (!exists $pr->{'owner'}) {
3758                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3759                 }
3760
3761                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3762                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3763                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3764                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3765                 $path  =~ s/ /\+/g;
3766                 $owner =~ s/ /\+/g;
3767
3768                 print "$path $owner\n";
3769         }
3770 }
3771
3772 sub git_summary {
3773         my $descr = git_get_project_description($project) || "none";
3774         my %co = parse_commit("HEAD");
3775         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3776         my $head = $co{'id'};
3777
3778         my $owner = git_get_project_owner($project);
3779
3780         my $refs = git_get_references();
3781         # These get_*_list functions return one more to allow us to see if
3782         # there are more ...
3783         my @taglist  = git_get_tags_list(16);
3784         my @headlist = git_get_heads_list(16);
3785         my @forklist;
3786         my ($check_forks) = gitweb_check_feature('forks');
3787
3788         if ($check_forks) {
3789                 @forklist = git_get_projects_list($project);
3790         }
3791
3792         git_header_html();
3793         git_print_page_nav('summary','', $head);
3794
3795         print "<div class=\"title\">&nbsp;</div>\n";
3796         print "<table cellspacing=\"0\">\n" .
3797               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3798               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3799         if (defined $cd{'rfc2822'}) {
3800                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3801         }
3802
3803         # use per project git URL list in $projectroot/$project/cloneurl
3804         # or make project git URL from git base URL and project name
3805         my $url_tag = "URL";
3806         my @url_list = git_get_project_url_list($project);
3807         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3808         foreach my $git_url (@url_list) {
3809                 next unless $git_url;
3810                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3811                 $url_tag = "";
3812         }
3813         print "</table>\n";
3814
3815         if (-s "$projectroot/$project/README.html") {
3816                 if (open my $fd, "$projectroot/$project/README.html") {
3817                         print "<div class=\"title\">readme</div>\n";
3818                         print $_ while (<$fd>);
3819                         close $fd;
3820                 }
3821         }
3822
3823         # we need to request one more than 16 (0..15) to check if
3824         # those 16 are all
3825         my @commitlist = $head ? parse_commits($head, 17) : ();
3826         if (@commitlist) {
3827                 git_print_header_div('shortlog');
3828                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3829                                   $#commitlist <=  15 ? undef :
3830                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3831         }
3832
3833         if (@taglist) {
3834                 git_print_header_div('tags');
3835                 git_tags_body(\@taglist, 0, 15,
3836                               $#taglist <=  15 ? undef :
3837                               $cgi->a({-href => href(action=>"tags")}, "..."));
3838         }
3839
3840         if (@headlist) {
3841                 git_print_header_div('heads');
3842                 git_heads_body(\@headlist, $head, 0, 15,
3843                                $#headlist <= 15 ? undef :
3844                                $cgi->a({-href => href(action=>"heads")}, "..."));
3845         }
3846
3847         if (@forklist) {
3848                 git_print_header_div('forks');
3849                 git_project_list_body(\@forklist, undef, 0, 15,
3850                                       $#forklist <= 15 ? undef :
3851                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3852                                       'noheader');
3853         }
3854
3855         git_footer_html();
3856 }
3857
3858 sub git_tag {
3859         my $head = git_get_head_hash($project);
3860         git_header_html();
3861         git_print_page_nav('','', $head,undef,$head);
3862         my %tag = parse_tag($hash);
3863
3864         if (! %tag) {
3865                 die_error(undef, "Unknown tag object");
3866         }
3867
3868         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3869         print "<div class=\"title_text\">\n" .
3870               "<table cellspacing=\"0\">\n" .
3871               "<tr>\n" .
3872               "<td>object</td>\n" .
3873               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3874                                $tag{'object'}) . "</td>\n" .
3875               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3876                                               $tag{'type'}) . "</td>\n" .
3877               "</tr>\n";
3878         if (defined($tag{'author'})) {
3879                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3880                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3881                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3882                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3883                         "</td></tr>\n";
3884         }
3885         print "</table>\n\n" .
3886               "</div>\n";
3887         print "<div class=\"page_body\">";
3888         my $comment = $tag{'comment'};
3889         foreach my $line (@$comment) {
3890                 chomp $line;
3891                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3892         }
3893         print "</div>\n";
3894         git_footer_html();
3895 }
3896
3897 sub git_blame2 {
3898         my $fd;
3899         my $ftype;
3900
3901         my ($have_blame) = gitweb_check_feature('blame');
3902         if (!$have_blame) {
3903                 die_error('403 Permission denied', "Permission denied");
3904         }
3905         die_error('404 Not Found', "File name not defined") if (!$file_name);
3906         $hash_base ||= git_get_head_hash($project);
3907         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3908         my %co = parse_commit($hash_base)
3909                 or die_error(undef, "Reading commit failed");
3910         if (!defined $hash) {
3911                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3912                         or die_error(undef, "Error looking up file");
3913         }
3914         $ftype = git_get_type($hash);
3915         if ($ftype !~ "blob") {
3916                 die_error('400 Bad Request', "Object is not a blob");
3917         }
3918         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3919               $file_name, $hash_base)
3920                 or die_error(undef, "Open git-blame failed");
3921         git_header_html();
3922         my $formats_nav =
3923                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3924                         "blob") .
3925                 " | " .
3926                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3927                         "history") .
3928                 " | " .
3929                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3930                         "HEAD");
3931         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3932         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3933         git_print_page_path($file_name, $ftype, $hash_base);
3934         my @rev_color = (qw(light2 dark2));
3935         my $num_colors = scalar(@rev_color);
3936         my $current_color = 0;
3937         my $last_rev;
3938         print <<HTML;
3939 <div class="page_body">
3940 <table class="blame">
3941 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3942 HTML
3943         my %metainfo = ();
3944         while (1) {
3945                 $_ = <$fd>;
3946                 last unless defined $_;
3947                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3948                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3949                 if (!exists $metainfo{$full_rev}) {
3950                         $metainfo{$full_rev} = {};
3951                 }
3952                 my $meta = $metainfo{$full_rev};
3953                 while (<$fd>) {
3954                         last if (s/^\t//);
3955                         if (/^(\S+) (.*)$/) {
3956                                 $meta->{$1} = $2;
3957                         }
3958                 }
3959                 my $data = $_;
3960                 chomp $data;
3961                 my $rev = substr($full_rev, 0, 8);
3962                 my $author = $meta->{'author'};
3963                 my %date = parse_date($meta->{'author-time'},
3964                                       $meta->{'author-tz'});
3965                 my $date = $date{'iso-tz'};
3966                 if ($group_size) {
3967                         $current_color = ++$current_color % $num_colors;
3968                 }
3969                 print "<tr class=\"$rev_color[$current_color]\">\n";
3970                 if ($group_size) {
3971                         print "<td class=\"sha1\"";
3972                         print " title=\"". esc_html($author) . ", $date\"";
3973                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3974                         print ">";
3975                         print $cgi->a({-href => href(action=>"commit",
3976                                                      hash=>$full_rev,
3977                                                      file_name=>$file_name)},
3978                                       esc_html($rev));
3979                         print "</td>\n";
3980                 }
3981                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3982                         or die_error(undef, "Open git-rev-parse failed");
3983                 my $parent_commit = <$dd>;
3984                 close $dd;
3985                 chomp($parent_commit);
3986                 my $blamed = href(action => 'blame',
3987                                   file_name => $meta->{'filename'},
3988                                   hash_base => $parent_commit);
3989                 print "<td class=\"linenr\">";
3990                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3991                                 -id => "l$lineno",
3992                                 -class => "linenr" },
3993                               esc_html($lineno));
3994                 print "</td>";
3995                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3996                 print "</tr>\n";
3997         }
3998         print "</table>\n";
3999         print "</div>";
4000         close $fd
4001                 or print "Reading blob failed\n";
4002         git_footer_html();
4003 }
4004
4005 sub git_blame {
4006         my $fd;
4007
4008         my ($have_blame) = gitweb_check_feature('blame');
4009         if (!$have_blame) {
4010                 die_error('403 Permission denied', "Permission denied");
4011         }
4012         die_error('404 Not Found', "File name not defined") if (!$file_name);
4013         $hash_base ||= git_get_head_hash($project);
4014         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4015         my %co = parse_commit($hash_base)
4016                 or die_error(undef, "Reading commit failed");
4017         if (!defined $hash) {
4018                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4019                         or die_error(undef, "Error lookup file");
4020         }
4021         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4022                 or die_error(undef, "Open git-annotate failed");
4023         git_header_html();
4024         my $formats_nav =
4025                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4026                         "blob") .
4027                 " | " .
4028                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4029                         "history") .
4030                 " | " .
4031                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4032                         "HEAD");
4033         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4034         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4035         git_print_page_path($file_name, 'blob', $hash_base);
4036         print "<div class=\"page_body\">\n";
4037         print <<HTML;
4038 <table class="blame">
4039   <tr>
4040     <th>Commit</th>
4041     <th>Age</th>
4042     <th>Author</th>
4043     <th>Line</th>
4044     <th>Data</th>
4045   </tr>
4046 HTML
4047         my @line_class = (qw(light dark));
4048         my $line_class_len = scalar (@line_class);
4049         my $line_class_num = $#line_class;
4050         while (my $line = <$fd>) {
4051                 my $long_rev;
4052                 my $short_rev;
4053                 my $author;
4054                 my $time;
4055                 my $lineno;
4056                 my $data;
4057                 my $age;
4058                 my $age_str;
4059                 my $age_class;
4060
4061                 chomp $line;
4062                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4063
4064                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4065                         $long_rev = $1;
4066                         $author   = $2;
4067                         $time     = $3;
4068                         $lineno   = $4;
4069                         $data     = $5;
4070                 } else {
4071                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4072                         next;
4073                 }
4074                 $short_rev  = substr ($long_rev, 0, 8);
4075                 $age        = time () - $time;
4076                 $age_str    = age_string ($age);
4077                 $age_str    =~ s/ /&nbsp;/g;
4078                 $age_class  = age_class($age);
4079                 $author     = esc_html ($author);
4080                 $author     =~ s/ /&nbsp;/g;
4081
4082                 $data = untabify($data);
4083                 $data = esc_html ($data);
4084
4085                 print <<HTML;
4086   <tr class="$line_class[$line_class_num]">
4087     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4088     <td class="$age_class">$age_str</td>
4089     <td>$author</td>
4090     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4091     <td class="pre">$data</td>
4092   </tr>
4093 HTML
4094         } # while (my $line = <$fd>)
4095         print "</table>\n\n";
4096         close $fd
4097                 or print "Reading blob failed.\n";
4098         print "</div>";
4099         git_footer_html();
4100 }
4101
4102 sub git_tags {
4103         my $head = git_get_head_hash($project);
4104         git_header_html();
4105         git_print_page_nav('','', $head,undef,$head);
4106         git_print_header_div('summary', $project);
4107
4108         my @tagslist = git_get_tags_list();
4109         if (@tagslist) {
4110                 git_tags_body(\@tagslist);
4111         }
4112         git_footer_html();
4113 }
4114
4115 sub git_heads {
4116         my $head = git_get_head_hash($project);
4117         git_header_html();
4118         git_print_page_nav('','', $head,undef,$head);
4119         git_print_header_div('summary', $project);
4120
4121         my @headslist = git_get_heads_list();
4122         if (@headslist) {
4123                 git_heads_body(\@headslist, $head);
4124         }
4125         git_footer_html();
4126 }
4127
4128 sub git_blob_plain {
4129         my $expires;
4130
4131         if (!defined $hash) {
4132                 if (defined $file_name) {
4133                         my $base = $hash_base || git_get_head_hash($project);
4134                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4135                                 or die_error(undef, "Error lookup file");
4136                 } else {
4137                         die_error(undef, "No file name defined");
4138                 }
4139         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4140                 # blobs defined by non-textual hash id's can be cached
4141                 $expires = "+1d";
4142         }
4143
4144         my $type = shift;
4145         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4146                 or die_error(undef, "Couldn't cat $file_name, $hash");
4147
4148         $type ||= blob_mimetype($fd, $file_name);
4149
4150         # save as filename, even when no $file_name is given
4151         my $save_as = "$hash";
4152         if (defined $file_name) {
4153                 $save_as = $file_name;
4154         } elsif ($type =~ m/^text\//) {
4155                 $save_as .= '.txt';
4156         }
4157
4158         print $cgi->header(
4159                 -type => "$type",
4160                 -expires=>$expires,
4161                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4162         undef $/;
4163         binmode STDOUT, ':raw';
4164         print <$fd>;
4165         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4166         $/ = "\n";
4167         close $fd;
4168 }
4169
4170 sub git_blob {
4171         my $expires;
4172
4173         if (!defined $hash) {
4174                 if (defined $file_name) {
4175                         my $base = $hash_base || git_get_head_hash($project);
4176                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4177                                 or die_error(undef, "Error lookup file");
4178                 } else {
4179                         die_error(undef, "No file name defined");
4180                 }
4181         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4182                 # blobs defined by non-textual hash id's can be cached
4183                 $expires = "+1d";
4184         }
4185
4186         my ($have_blame) = gitweb_check_feature('blame');
4187         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4188                 or die_error(undef, "Couldn't cat $file_name, $hash");
4189         my $mimetype = blob_mimetype($fd, $file_name);
4190         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4191                 close $fd;
4192                 return git_blob_plain($mimetype);
4193         }
4194         # we can have blame only for text/* mimetype
4195         $have_blame &&= ($mimetype =~ m!^text/!);
4196
4197         git_header_html(undef, $expires);
4198         my $formats_nav = '';
4199         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4200                 if (defined $file_name) {
4201                         if ($have_blame) {
4202                                 $formats_nav .=
4203                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4204                                                                hash=>$hash, file_name=>$file_name)},
4205                                                 "blame") .
4206                                         " | ";
4207                         }
4208                         $formats_nav .=
4209                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4210                                                        hash=>$hash, file_name=>$file_name)},
4211                                         "history") .
4212                                 " | " .
4213                                 $cgi->a({-href => href(action=>"blob_plain",
4214                                                        hash=>$hash, file_name=>$file_name)},
4215                                         "raw") .
4216                                 " | " .
4217                                 $cgi->a({-href => href(action=>"blob",
4218                                                        hash_base=>"HEAD", file_name=>$file_name)},
4219                                         "HEAD");
4220                 } else {
4221                         $formats_nav .=
4222                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4223                 }
4224                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4225                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4226         } else {
4227                 print "<div class=\"page_nav\">\n" .
4228                       "<br/><br/></div>\n" .
4229                       "<div class=\"title\">$hash</div>\n";
4230         }
4231         git_print_page_path($file_name, "blob", $hash_base);
4232         print "<div class=\"page_body\">\n";
4233         if ($mimetype =~ m!^text/!) {
4234                 my $nr;
4235                 while (my $line = <$fd>) {
4236                         chomp $line;
4237                         $nr++;
4238                         $line = untabify($line);
4239                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4240                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4241                 }
4242         } elsif ($mimetype =~ m!^image/!) {
4243                 print qq!<img type="$mimetype"!;
4244                 if ($file_name) {
4245                         print qq! alt="$file_name" title="$file_name"!;
4246                 }
4247                 print qq! src="! .
4248                       href(action=>"blob_plain", hash=>$hash,
4249                            hash_base=>$hash_base, file_name=>$file_name) .
4250                       qq!" />\n!;
4251         }
4252         close $fd
4253                 or print "Reading blob failed.\n";
4254         print "</div>";
4255         git_footer_html();
4256 }
4257
4258 sub git_tree {
4259         if (!defined $hash_base) {
4260                 $hash_base = "HEAD";
4261         }
4262         if (!defined $hash) {
4263                 if (defined $file_name) {
4264                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4265                 } else {
4266                         $hash = $hash_base;
4267                 }
4268         }
4269         $/ = "\0";
4270         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4271                 or die_error(undef, "Open git-ls-tree failed");
4272         my @entries = map { chomp; $_ } <$fd>;
4273         close $fd or die_error(undef, "Reading tree failed");
4274         $/ = "\n";
4275
4276         my $refs = git_get_references();
4277         my $ref = format_ref_marker($refs, $hash_base);
4278         git_header_html();
4279         my $basedir = '';
4280         my ($have_blame) = gitweb_check_feature('blame');
4281         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4282                 my @views_nav = ();
4283                 if (defined $file_name) {
4284                         push @views_nav,
4285                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4286                                                        hash=>$hash, file_name=>$file_name)},
4287                                         "history"),
4288                                 $cgi->a({-href => href(action=>"tree",
4289                                                        hash_base=>"HEAD", file_name=>$file_name)},
4290                                         "HEAD"),
4291                 }
4292                 my $snapshot_links = format_snapshot_links($hash);
4293                 if (defined $snapshot_links) {
4294                         # FIXME: Should be available when we have no hash base as well.
4295                         push @views_nav, $snapshot_links;
4296                 }
4297                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4298                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4299         } else {
4300                 undef $hash_base;
4301                 print "<div class=\"page_nav\">\n";
4302                 print "<br/><br/></div>\n";
4303                 print "<div class=\"title\">$hash</div>\n";
4304         }
4305         if (defined $file_name) {
4306                 $basedir = $file_name;
4307                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4308                         $basedir .= '/';
4309                 }
4310         }
4311         git_print_page_path($file_name, 'tree', $hash_base);
4312         print "<div class=\"page_body\">\n";
4313         print "<table cellspacing=\"0\">\n";
4314         my $alternate = 1;
4315         # '..' (top directory) link if possible
4316         if (defined $hash_base &&
4317             defined $file_name && $file_name =~ m![^/]+$!) {
4318                 if ($alternate) {
4319                         print "<tr class=\"dark\">\n";
4320                 } else {
4321                         print "<tr class=\"light\">\n";
4322                 }
4323                 $alternate ^= 1;
4324
4325                 my $up = $file_name;
4326                 $up =~ s!/?[^/]+$!!;
4327                 undef $up unless $up;
4328                 # based on git_print_tree_entry
4329                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4330                 print '<td class="list">';
4331                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4332                                              file_name=>$up)},
4333                               "..");
4334                 print "</td>\n";
4335                 print "<td class=\"link\"></td>\n";
4336
4337                 print "</tr>\n";
4338         }
4339         foreach my $line (@entries) {
4340                 my %t = parse_ls_tree_line($line, -z => 1);
4341
4342                 if ($alternate) {
4343                         print "<tr class=\"dark\">\n";
4344                 } else {
4345                         print "<tr class=\"light\">\n";
4346                 }
4347                 $alternate ^= 1;
4348
4349                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4350
4351                 print "</tr>\n";
4352         }
4353         print "</table>\n" .
4354               "</div>";
4355         git_footer_html();
4356 }
4357
4358 sub git_snapshot {
4359         my @supported_fmts = gitweb_check_feature('snapshot');
4360         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4361
4362         my $format = $cgi->param('sf');
4363         if (!@supported_fmts) {
4364                 die_error('403 Permission denied', "Permission denied");
4365         }
4366         # default to first supported snapshot format
4367         $format ||= $supported_fmts[0];
4368         if ($format !~ m/^[a-z0-9]+$/) {
4369                 die_error(undef, "Invalid snapshot format parameter");
4370         } elsif (!exists($known_snapshot_formats{$format})) {
4371                 die_error(undef, "Unknown snapshot format");
4372         } elsif (!grep($_ eq $format, @supported_fmts)) {
4373                 die_error(undef, "Unsupported snapshot format");
4374         }
4375
4376         if (!defined $hash) {
4377                 $hash = git_get_head_hash($project);
4378         }
4379
4380         my $git_command = git_cmd_str();
4381         my $name = $project;
4382         $name =~ s,([^/])/*\.git$,$1,;
4383         $name = basename($name);
4384         my $filename = to_utf8($name);
4385         $name =~ s/\047/\047\\\047\047/g;
4386         my $cmd;
4387         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4388         $cmd = "$git_command archive " .
4389                 "--format=$known_snapshot_formats{$format}{'format'} " .
4390                 "--prefix=\'$name\'/ $hash";
4391         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4392                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4393         }
4394
4395         print $cgi->header(
4396                 -type => $known_snapshot_formats{$format}{'type'},
4397                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4398                 -status => '200 OK');
4399
4400         open my $fd, "-|", $cmd
4401                 or die_error(undef, "Execute git-archive failed");
4402         binmode STDOUT, ':raw';
4403         print <$fd>;
4404         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4405         close $fd;
4406 }
4407
4408 sub git_log {
4409         my $head = git_get_head_hash($project);
4410         if (!defined $hash) {
4411                 $hash = $head;
4412         }
4413         if (!defined $page) {
4414                 $page = 0;
4415         }
4416         my $refs = git_get_references();
4417
4418         my @commitlist = parse_commits($hash, 101, (100 * $page));
4419
4420         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4421
4422         git_header_html();
4423         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4424
4425         if (!@commitlist) {
4426                 my %co = parse_commit($hash);
4427
4428                 git_print_header_div('summary', $project);
4429                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4430         }
4431         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4432         for (my $i = 0; $i <= $to; $i++) {
4433                 my %co = %{$commitlist[$i]};
4434                 next if !%co;
4435                 my $commit = $co{'id'};
4436                 my $ref = format_ref_marker($refs, $commit);
4437                 my %ad = parse_date($co{'author_epoch'});
4438                 git_print_header_div('commit',
4439                                "<span class=\"age\">$co{'age_string'}</span>" .
4440                                esc_html($co{'title'}) . $ref,
4441                                $commit);
4442                 print "<div class=\"title_text\">\n" .
4443                       "<div class=\"log_link\">\n" .
4444                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4445                       " | " .
4446                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4447                       " | " .
4448                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4449                       "<br/>\n" .
4450                       "</div>\n" .
4451                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4452                       "</div>\n";
4453
4454                 print "<div class=\"log_body\">\n";
4455                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4456                 print "</div>\n";
4457         }
4458         if ($#commitlist >= 100) {
4459                 print "<div class=\"page_nav\">\n";
4460                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4461                                -accesskey => "n", -title => "Alt-n"}, "next");
4462                 print "</div>\n";
4463         }
4464         git_footer_html();
4465 }
4466
4467 sub git_commit {
4468         $hash ||= $hash_base || "HEAD";
4469         my %co = parse_commit($hash);
4470         if (!%co) {
4471                 die_error(undef, "Unknown commit object");
4472         }
4473         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4474         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4475
4476         my $parent  = $co{'parent'};
4477         my $parents = $co{'parents'}; # listref
4478
4479         # we need to prepare $formats_nav before any parameter munging
4480         my $formats_nav;
4481         if (!defined $parent) {
4482                 # --root commitdiff
4483                 $formats_nav .= '(initial)';
4484         } elsif (@$parents == 1) {
4485                 # single parent commit
4486                 $formats_nav .=
4487                         '(parent: ' .
4488                         $cgi->a({-href => href(action=>"commit",
4489                                                hash=>$parent)},
4490                                 esc_html(substr($parent, 0, 7))) .
4491                         ')';
4492         } else {
4493                 # merge commit
4494                 $formats_nav .=
4495                         '(merge: ' .
4496                         join(' ', map {
4497                                 $cgi->a({-href => href(action=>"commit",
4498                                                        hash=>$_)},
4499                                         esc_html(substr($_, 0, 7)));
4500                         } @$parents ) .
4501                         ')';
4502         }
4503
4504         if (!defined $parent) {
4505                 $parent = "--root";
4506         }
4507         my @difftree;
4508         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4509                 @diff_opts,
4510                 (@$parents <= 1 ? $parent : '-c'),
4511                 $hash, "--"
4512                 or die_error(undef, "Open git-diff-tree failed");
4513         @difftree = map { chomp; $_ } <$fd>;
4514         close $fd or die_error(undef, "Reading git-diff-tree failed");
4515
4516         # non-textual hash id's can be cached
4517         my $expires;
4518         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4519                 $expires = "+1d";
4520         }
4521         my $refs = git_get_references();
4522         my $ref = format_ref_marker($refs, $co{'id'});
4523
4524         git_header_html(undef, $expires);
4525         git_print_page_nav('commit', '',
4526                            $hash, $co{'tree'}, $hash,
4527                            $formats_nav);
4528
4529         if (defined $co{'parent'}) {
4530                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4531         } else {
4532                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4533         }
4534         print "<div class=\"title_text\">\n" .
4535               "<table cellspacing=\"0\">\n";
4536         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4537               "<tr>" .
4538               "<td></td><td> $ad{'rfc2822'}";
4539         if ($ad{'hour_local'} < 6) {
4540                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4541                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4542         } else {
4543                 printf(" (%02d:%02d %s)",
4544                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4545         }
4546         print "</td>" .
4547               "</tr>\n";
4548         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4549         print "<tr><td></td><td> $cd{'rfc2822'}" .
4550               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4551               "</td></tr>\n";
4552         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4553         print "<tr>" .
4554               "<td>tree</td>" .
4555               "<td class=\"sha1\">" .
4556               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4557                        class => "list"}, $co{'tree'}) .
4558               "</td>" .
4559               "<td class=\"link\">" .
4560               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4561                       "tree");
4562         my $snapshot_links = format_snapshot_links($hash);
4563         if (defined $snapshot_links) {
4564                 print " | " . $snapshot_links;
4565         }
4566         print "</td>" .
4567               "</tr>\n";
4568
4569         foreach my $par (@$parents) {
4570                 print "<tr>" .
4571                       "<td>parent</td>" .
4572                       "<td class=\"sha1\">" .
4573                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4574                                class => "list"}, $par) .
4575                       "</td>" .
4576                       "<td class=\"link\">" .
4577                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4578                       " | " .
4579                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4580                       "</td>" .
4581                       "</tr>\n";
4582         }
4583         print "</table>".
4584               "</div>\n";
4585
4586         print "<div class=\"page_body\">\n";
4587         git_print_log($co{'comment'});
4588         print "</div>\n";
4589
4590         git_difftree_body(\@difftree, $hash, @$parents);
4591
4592         git_footer_html();
4593 }
4594
4595 sub git_object {
4596         # object is defined by:
4597         # - hash or hash_base alone
4598         # - hash_base and file_name
4599         my $type;
4600
4601         # - hash or hash_base alone
4602         if ($hash || ($hash_base && !defined $file_name)) {
4603                 my $object_id = $hash || $hash_base;
4604
4605                 my $git_command = git_cmd_str();
4606                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4607                         or die_error('404 Not Found', "Object does not exist");
4608                 $type = <$fd>;
4609                 chomp $type;
4610                 close $fd
4611                         or die_error('404 Not Found', "Object does not exist");
4612
4613         # - hash_base and file_name
4614         } elsif ($hash_base && defined $file_name) {
4615                 $file_name =~ s,/+$,,;
4616
4617                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4618                         or die_error('404 Not Found', "Base object does not exist");
4619
4620                 # here errors should not hapen
4621                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4622                         or die_error(undef, "Open git-ls-tree failed");
4623                 my $line = <$fd>;
4624                 close $fd;
4625
4626                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4627                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4628                         die_error('404 Not Found', "File or directory for given base does not exist");
4629                 }
4630                 $type = $2;
4631                 $hash = $3;
4632         } else {
4633                 die_error('404 Not Found', "Not enough information to find object");
4634         }
4635
4636         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4637                                           hash=>$hash, hash_base=>$hash_base,
4638                                           file_name=>$file_name),
4639                              -status => '302 Found');
4640 }
4641
4642 sub git_blobdiff {
4643         my $format = shift || 'html';
4644
4645         my $fd;
4646         my @difftree;
4647         my %diffinfo;
4648         my $expires;
4649
4650         # preparing $fd and %diffinfo for git_patchset_body
4651         # new style URI
4652         if (defined $hash_base && defined $hash_parent_base) {
4653                 if (defined $file_name) {
4654                         # read raw output
4655                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4656                                 $hash_parent_base, $hash_base,
4657                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4658                                 or die_error(undef, "Open git-diff-tree failed");
4659                         @difftree = map { chomp; $_ } <$fd>;
4660                         close $fd
4661                                 or die_error(undef, "Reading git-diff-tree failed");
4662                         @difftree
4663                                 or die_error('404 Not Found', "Blob diff not found");
4664
4665                 } elsif (defined $hash &&
4666                          $hash =~ /[0-9a-fA-F]{40}/) {
4667                         # try to find filename from $hash
4668
4669                         # read filtered raw output
4670                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4671                                 $hash_parent_base, $hash_base, "--"
4672                                 or die_error(undef, "Open git-diff-tree failed");
4673                         @difftree =
4674                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4675                                 # $hash == to_id
4676                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4677                                 map { chomp; $_ } <$fd>;
4678                         close $fd
4679                                 or die_error(undef, "Reading git-diff-tree failed");
4680                         @difftree
4681                                 or die_error('404 Not Found', "Blob diff not found");
4682
4683                 } else {
4684                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4685                 }
4686
4687                 if (@difftree > 1) {
4688                         die_error('404 Not Found', "Ambiguous blob diff specification");
4689                 }
4690
4691                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4692                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4693                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4694
4695                 $hash_parent ||= $diffinfo{'from_id'};
4696                 $hash        ||= $diffinfo{'to_id'};
4697
4698                 # non-textual hash id's can be cached
4699                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4700                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4701                         $expires = '+1d';
4702                 }
4703
4704                 # open patch output
4705                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4706                         '-p', ($format eq 'html' ? "--full-index" : ()),
4707                         $hash_parent_base, $hash_base,
4708                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4709                         or die_error(undef, "Open git-diff-tree failed");
4710         }
4711
4712         # old/legacy style URI
4713         if (!%diffinfo && # if new style URI failed
4714             defined $hash && defined $hash_parent) {
4715                 # fake git-diff-tree raw output
4716                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4717                 $diffinfo{'from_id'} = $hash_parent;
4718                 $diffinfo{'to_id'}   = $hash;
4719                 if (defined $file_name) {
4720                         if (defined $file_parent) {
4721                                 $diffinfo{'status'} = '2';
4722                                 $diffinfo{'from_file'} = $file_parent;
4723                                 $diffinfo{'to_file'}   = $file_name;
4724                         } else { # assume not renamed
4725                                 $diffinfo{'status'} = '1';
4726                                 $diffinfo{'from_file'} = $file_name;
4727                                 $diffinfo{'to_file'}   = $file_name;
4728                         }
4729                 } else { # no filename given
4730                         $diffinfo{'status'} = '2';
4731                         $diffinfo{'from_file'} = $hash_parent;
4732                         $diffinfo{'to_file'}   = $hash;
4733                 }
4734
4735                 # non-textual hash id's can be cached
4736                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4737                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4738                         $expires = '+1d';
4739                 }
4740
4741                 # open patch output
4742                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4743                         '-p', ($format eq 'html' ? "--full-index" : ()),
4744                         $hash_parent, $hash, "--"
4745                         or die_error(undef, "Open git-diff failed");
4746         } else  {
4747                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4748                         unless %diffinfo;
4749         }
4750
4751         # header
4752         if ($format eq 'html') {
4753                 my $formats_nav =
4754                         $cgi->a({-href => href(action=>"blobdiff_plain",
4755                                                hash=>$hash, hash_parent=>$hash_parent,
4756                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4757                                                file_name=>$file_name, file_parent=>$file_parent)},
4758                                 "raw");
4759                 git_header_html(undef, $expires);
4760                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4761                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4762                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4763                 } else {
4764                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4765                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4766                 }
4767                 if (defined $file_name) {
4768                         git_print_page_path($file_name, "blob", $hash_base);
4769                 } else {
4770                         print "<div class=\"page_path\"></div>\n";
4771                 }
4772
4773         } elsif ($format eq 'plain') {
4774                 print $cgi->header(
4775                         -type => 'text/plain',
4776                         -charset => 'utf-8',
4777                         -expires => $expires,
4778                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4779
4780                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4781
4782         } else {
4783                 die_error(undef, "Unknown blobdiff format");
4784         }
4785
4786         # patch
4787         if ($format eq 'html') {
4788                 print "<div class=\"page_body\">\n";
4789
4790                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4791                 close $fd;
4792
4793                 print "</div>\n"; # class="page_body"
4794                 git_footer_html();
4795
4796         } else {
4797                 while (my $line = <$fd>) {
4798                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4799                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4800
4801                         print $line;
4802
4803                         last if $line =~ m!^\+\+\+!;
4804                 }
4805                 local $/ = undef;
4806                 print <$fd>;
4807                 close $fd;
4808         }
4809 }
4810
4811 sub git_blobdiff_plain {
4812         git_blobdiff('plain');
4813 }
4814
4815 sub git_commitdiff {
4816         my $format = shift || 'html';
4817         $hash ||= $hash_base || "HEAD";
4818         my %co = parse_commit($hash);
4819         if (!%co) {
4820                 die_error(undef, "Unknown commit object");
4821         }
4822
4823         # choose format for commitdiff for merge
4824         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4825                 $hash_parent = '--cc';
4826         }
4827         # we need to prepare $formats_nav before almost any parameter munging
4828         my $formats_nav;
4829         if ($format eq 'html') {
4830                 $formats_nav =
4831                         $cgi->a({-href => href(action=>"commitdiff_plain",
4832                                                hash=>$hash, hash_parent=>$hash_parent)},
4833                                 "raw");
4834
4835                 if (defined $hash_parent &&
4836                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4837                         # commitdiff with two commits given
4838                         my $hash_parent_short = $hash_parent;
4839                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4840                                 $hash_parent_short = substr($hash_parent, 0, 7);
4841                         }
4842                         $formats_nav .=
4843                                 ' (from';
4844                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4845                                 if ($co{'parents'}[$i] eq $hash_parent) {
4846                                         $formats_nav .= ' parent ' . ($i+1);
4847                                         last;
4848                                 }
4849                         }
4850                         $formats_nav .= ': ' .
4851                                 $cgi->a({-href => href(action=>"commitdiff",
4852                                                        hash=>$hash_parent)},
4853                                         esc_html($hash_parent_short)) .
4854                                 ')';
4855                 } elsif (!$co{'parent'}) {
4856                         # --root commitdiff
4857                         $formats_nav .= ' (initial)';
4858                 } elsif (scalar @{$co{'parents'}} == 1) {
4859                         # single parent commit
4860                         $formats_nav .=
4861                                 ' (parent: ' .
4862                                 $cgi->a({-href => href(action=>"commitdiff",
4863                                                        hash=>$co{'parent'})},
4864                                         esc_html(substr($co{'parent'}, 0, 7))) .
4865                                 ')';
4866                 } else {
4867                         # merge commit
4868                         if ($hash_parent eq '--cc') {
4869                                 $formats_nav .= ' | ' .
4870                                         $cgi->a({-href => href(action=>"commitdiff",
4871                                                                hash=>$hash, hash_parent=>'-c')},
4872                                                 'combined');
4873                         } else { # $hash_parent eq '-c'
4874                                 $formats_nav .= ' | ' .
4875                                         $cgi->a({-href => href(action=>"commitdiff",
4876                                                                hash=>$hash, hash_parent=>'--cc')},
4877                                                 'compact');
4878                         }
4879                         $formats_nav .=
4880                                 ' (merge: ' .
4881                                 join(' ', map {
4882                                         $cgi->a({-href => href(action=>"commitdiff",
4883                                                                hash=>$_)},
4884                                                 esc_html(substr($_, 0, 7)));
4885                                 } @{$co{'parents'}} ) .
4886                                 ')';
4887                 }
4888         }
4889
4890         my $hash_parent_param = $hash_parent;
4891         if (!defined $hash_parent_param) {
4892                 # --cc for multiple parents, --root for parentless
4893                 $hash_parent_param =
4894                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4895         }
4896
4897         # read commitdiff
4898         my $fd;
4899         my @difftree;
4900         if ($format eq 'html') {
4901                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4902                         "--no-commit-id", "--patch-with-raw", "--full-index",
4903                         $hash_parent_param, $hash, "--"
4904                         or die_error(undef, "Open git-diff-tree failed");
4905
4906                 while (my $line = <$fd>) {
4907                         chomp $line;
4908                         # empty line ends raw part of diff-tree output
4909                         last unless $line;
4910                         push @difftree, scalar parse_difftree_raw_line($line);
4911                 }
4912
4913         } elsif ($format eq 'plain') {
4914                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4915                         '-p', $hash_parent_param, $hash, "--"
4916                         or die_error(undef, "Open git-diff-tree failed");
4917
4918         } else {
4919                 die_error(undef, "Unknown commitdiff format");
4920         }
4921
4922         # non-textual hash id's can be cached
4923         my $expires;
4924         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4925                 $expires = "+1d";
4926         }
4927
4928         # write commit message
4929         if ($format eq 'html') {
4930                 my $refs = git_get_references();
4931                 my $ref = format_ref_marker($refs, $co{'id'});
4932
4933                 git_header_html(undef, $expires);
4934                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4935                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4936                 git_print_authorship(\%co);
4937                 print "<div class=\"page_body\">\n";
4938                 if (@{$co{'comment'}} > 1) {
4939                         print "<div class=\"log\">\n";
4940                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4941                         print "</div>\n"; # class="log"
4942                 }
4943
4944         } elsif ($format eq 'plain') {
4945                 my $refs = git_get_references("tags");
4946                 my $tagname = git_get_rev_name_tags($hash);
4947                 my $filename = basename($project) . "-$hash.patch";
4948
4949                 print $cgi->header(
4950                         -type => 'text/plain',
4951                         -charset => 'utf-8',
4952                         -expires => $expires,
4953                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4954                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4955                 print <<TEXT;
4956 From: $co{'author'}
4957 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4958 Subject: $co{'title'}
4959 TEXT
4960                 print "X-Git-Tag: $tagname\n" if $tagname;
4961                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4962
4963                 foreach my $line (@{$co{'comment'}}) {
4964                         print "$line\n";
4965                 }
4966                 print "---\n\n";
4967         }
4968
4969         # write patch
4970         if ($format eq 'html') {
4971                 my $use_parents = !defined $hash_parent ||
4972                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4973                 git_difftree_body(\@difftree, $hash,
4974                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4975                 print "<br/>\n";
4976
4977                 git_patchset_body($fd, \@difftree, $hash,
4978                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4979                 close $fd;
4980                 print "</div>\n"; # class="page_body"
4981                 git_footer_html();
4982
4983         } elsif ($format eq 'plain') {
4984                 local $/ = undef;
4985                 print <$fd>;
4986                 close $fd
4987                         or print "Reading git-diff-tree failed\n";
4988         }
4989 }
4990
4991 sub git_commitdiff_plain {
4992         git_commitdiff('plain');
4993 }
4994
4995 sub git_history {
4996         if (!defined $hash_base) {
4997                 $hash_base = git_get_head_hash($project);
4998         }
4999         if (!defined $page) {
5000                 $page = 0;
5001         }
5002         my $ftype;
5003         my %co = parse_commit($hash_base);
5004         if (!%co) {
5005                 die_error(undef, "Unknown commit object");
5006         }
5007
5008         my $refs = git_get_references();
5009         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5010
5011         if (!defined $hash && defined $file_name) {
5012                 $hash = git_get_hash_by_path($hash_base, $file_name);
5013         }
5014         if (defined $hash) {
5015                 $ftype = git_get_type($hash);
5016         }
5017
5018         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5019
5020         my $paging_nav = '';
5021         if ($page > 0) {
5022                 $paging_nav .=
5023                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5024                                                file_name=>$file_name)},
5025                                 "first");
5026                 $paging_nav .= " &sdot; " .
5027                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5028                                                file_name=>$file_name, page=>$page-1),
5029                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5030         } else {
5031                 $paging_nav .= "first";
5032                 $paging_nav .= " &sdot; prev";
5033         }
5034         if ($#commitlist >= 100) {
5035                 $paging_nav .= " &sdot; " .
5036                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5037                                                file_name=>$file_name, page=>$page+1),
5038                                  -accesskey => "n", -title => "Alt-n"}, "next");
5039         } else {
5040                 $paging_nav .= " &sdot; next";
5041         }
5042         my $next_link = '';
5043         if ($#commitlist >= 100) {
5044                 $next_link =
5045                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5046                                                file_name=>$file_name, page=>$page+1),
5047                                  -accesskey => "n", -title => "Alt-n"}, "next");
5048         }
5049
5050         git_header_html();
5051         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5052         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5053         git_print_page_path($file_name, $ftype, $hash_base);
5054
5055         git_history_body(\@commitlist, 0, 99,
5056                          $refs, $hash_base, $ftype, $next_link);
5057
5058         git_footer_html();
5059 }
5060
5061 sub git_search {
5062         my ($have_search) = gitweb_check_feature('search');
5063         if (!$have_search) {
5064                 die_error('403 Permission denied', "Permission denied");
5065         }
5066         if (!defined $searchtext) {
5067                 die_error(undef, "Text field empty");
5068         }
5069         if (!defined $hash) {
5070                 $hash = git_get_head_hash($project);
5071         }
5072         my %co = parse_commit($hash);
5073         if (!%co) {
5074                 die_error(undef, "Unknown commit object");
5075         }
5076         if (!defined $page) {
5077                 $page = 0;
5078         }
5079
5080         $searchtype ||= 'commit';
5081         if ($searchtype eq 'pickaxe') {
5082                 # pickaxe may take all resources of your box and run for several minutes
5083                 # with every query - so decide by yourself how public you make this feature
5084                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5085                 if (!$have_pickaxe) {
5086                         die_error('403 Permission denied', "Permission denied");
5087                 }
5088         }
5089         if ($searchtype eq 'grep') {
5090                 my ($have_grep) = gitweb_check_feature('grep');
5091                 if (!$have_grep) {
5092                         die_error('403 Permission denied', "Permission denied");
5093                 }
5094         }
5095
5096         git_header_html();
5097
5098         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5099                 my $greptype;
5100                 if ($searchtype eq 'commit') {
5101                         $greptype = "--grep=";
5102                 } elsif ($searchtype eq 'author') {
5103                         $greptype = "--author=";
5104                 } elsif ($searchtype eq 'committer') {
5105                         $greptype = "--committer=";
5106                 }
5107                 $greptype .= $search_regexp;
5108                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5109
5110                 my $paging_nav = '';
5111                 if ($page > 0) {
5112                         $paging_nav .=
5113                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5114                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5115                                         "first");
5116                         $paging_nav .= " &sdot; " .
5117                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5118                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5119                                                        page=>$page-1),
5120                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5121                 } else {
5122                         $paging_nav .= "first";
5123                         $paging_nav .= " &sdot; prev";
5124                 }
5125                 if ($#commitlist >= 100) {
5126                         $paging_nav .= " &sdot; " .
5127                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5128                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5129                                                        page=>$page+1),
5130                                          -accesskey => "n", -title => "Alt-n"}, "next");
5131                 } else {
5132                         $paging_nav .= " &sdot; next";
5133                 }
5134                 my $next_link = '';
5135                 if ($#commitlist >= 100) {
5136                         $next_link =
5137                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5138                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5139                                                        page=>$page+1),
5140                                          -accesskey => "n", -title => "Alt-n"}, "next");
5141                 }
5142
5143                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5144                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5145                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5146         }
5147
5148         if ($searchtype eq 'pickaxe') {
5149                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5150                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5151
5152                 print "<table cellspacing=\"0\">\n";
5153                 my $alternate = 1;
5154                 $/ = "\n";
5155                 my $git_command = git_cmd_str();
5156                 my $searchqtext = $searchtext;
5157                 $searchqtext =~ s/'/'\\''/;
5158                 open my $fd, "-|", "$git_command rev-list $hash | " .
5159                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5160                 undef %co;
5161                 my @files;
5162                 while (my $line = <$fd>) {
5163                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5164                                 my %set;
5165                                 $set{'file'} = $6;
5166                                 $set{'from_id'} = $3;
5167                                 $set{'to_id'} = $4;
5168                                 $set{'id'} = $set{'to_id'};
5169                                 if ($set{'id'} =~ m/0{40}/) {
5170                                         $set{'id'} = $set{'from_id'};
5171                                 }
5172                                 if ($set{'id'} =~ m/0{40}/) {
5173                                         next;
5174                                 }
5175                                 push @files, \%set;
5176                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5177                                 if (%co) {
5178                                         if ($alternate) {
5179                                                 print "<tr class=\"dark\">\n";
5180                                         } else {
5181                                                 print "<tr class=\"light\">\n";
5182                                         }
5183                                         $alternate ^= 1;
5184                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5185                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5186                                               "<td>" .
5187                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5188                                                       -class => "list subject"},
5189                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5190                                         while (my $setref = shift @files) {
5191                                                 my %set = %$setref;
5192                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5193                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5194                                                               -class => "list"},
5195                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5196                                                       "<br/>\n";
5197                                         }
5198                                         print "</td>\n" .
5199                                               "<td class=\"link\">" .
5200                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5201                                               " | " .
5202                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5203                                         print "</td>\n" .
5204                                               "</tr>\n";
5205                                 }
5206                                 %co = parse_commit($1);
5207                         }
5208                 }
5209                 close $fd;
5210
5211                 print "</table>\n";
5212         }
5213
5214         if ($searchtype eq 'grep') {
5215                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5216                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5217
5218                 print "<table cellspacing=\"0\">\n";
5219                 my $alternate = 1;
5220                 my $matches = 0;
5221                 $/ = "\n";
5222                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5223                 my $lastfile = '';
5224                 while (my $line = <$fd>) {
5225                         chomp $line;
5226                         my ($file, $lno, $ltext, $binary);
5227                         last if ($matches++ > 1000);
5228                         if ($line =~ /^Binary file (.+) matches$/) {
5229                                 $file = $1;
5230                                 $binary = 1;
5231                         } else {
5232                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5233                         }
5234                         if ($file ne $lastfile) {
5235                                 $lastfile and print "</td></tr>\n";
5236                                 if ($alternate++) {
5237                                         print "<tr class=\"dark\">\n";
5238                                 } else {
5239                                         print "<tr class=\"light\">\n";
5240                                 }
5241                                 print "<td class=\"list\">".
5242                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5243                                                                file_name=>"$file"),
5244                                                 -class => "list"}, esc_path($file));
5245                                 print "</td><td>\n";
5246                                 $lastfile = $file;
5247                         }
5248                         if ($binary) {
5249                                 print "<div class=\"binary\">Binary file</div>\n";
5250                         } else {
5251                                 $ltext = untabify($ltext);
5252                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5253                                         $ltext = esc_html($1, -nbsp=>1);
5254                                         $ltext .= '<span class="match">';
5255                                         $ltext .= esc_html($2, -nbsp=>1);
5256                                         $ltext .= '</span>';
5257                                         $ltext .= esc_html($3, -nbsp=>1);
5258                                 } else {
5259                                         $ltext = esc_html($ltext, -nbsp=>1);
5260                                 }
5261                                 print "<div class=\"pre\">" .
5262                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5263                                                                file_name=>"$file").'#l'.$lno,
5264                                                 -class => "linenr"}, sprintf('%4i', $lno))
5265                                         . ' ' .  $ltext . "</div>\n";
5266                         }
5267                 }
5268                 if ($lastfile) {
5269                         print "</td></tr>\n";
5270                         if ($matches > 1000) {
5271                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5272                         }
5273                 } else {
5274                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5275                 }
5276                 close $fd;
5277
5278                 print "</table>\n";
5279         }
5280         git_footer_html();
5281 }
5282
5283 sub git_search_help {
5284         git_header_html();
5285         git_print_page_nav('','', $hash,$hash,$hash);
5286         print <<EOT;
5287 <dl>
5288 <dt><b>commit</b></dt>
5289 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5290 EOT
5291         my ($have_grep) = gitweb_check_feature('grep');
5292         if ($have_grep) {
5293                 print <<EOT;
5294 <dt><b>grep</b></dt>
5295 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5296     a different one) are searched for the given
5297 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5298 (POSIX extended) and the matches are listed. On large
5299 trees, this search can take a while and put some strain on the server, so please use it with
5300 some consideration.</dd>
5301 EOT
5302         }
5303         print <<EOT;
5304 <dt><b>author</b></dt>
5305 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5306 <dt><b>committer</b></dt>
5307 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5308 EOT
5309         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5310         if ($have_pickaxe) {
5311                 print <<EOT;
5312 <dt><b>pickaxe</b></dt>
5313 <dd>All commits that caused the string to appear or disappear from any file (changes that
5314 added, removed or "modified" the string) will be listed. This search can take a while and
5315 takes a lot of strain on the server, so please use it wisely.</dd>
5316 EOT
5317         }
5318         print "</dl>\n";
5319         git_footer_html();
5320 }
5321
5322 sub git_shortlog {
5323         my $head = git_get_head_hash($project);
5324         if (!defined $hash) {
5325                 $hash = $head;
5326         }
5327         if (!defined $page) {
5328                 $page = 0;
5329         }
5330         my $refs = git_get_references();
5331
5332         my @commitlist = parse_commits($hash, 101, (100 * $page));
5333
5334         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5335         my $next_link = '';
5336         if ($#commitlist >= 100) {
5337                 $next_link =
5338                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5339                                  -accesskey => "n", -title => "Alt-n"}, "next");
5340         }
5341
5342         git_header_html();
5343         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5344         git_print_header_div('summary', $project);
5345
5346         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5347
5348         git_footer_html();
5349 }
5350
5351 ## ......................................................................
5352 ## feeds (RSS, Atom; OPML)
5353
5354 sub git_feed {
5355         my $format = shift || 'atom';
5356         my ($have_blame) = gitweb_check_feature('blame');
5357
5358         # Atom: http://www.atomenabled.org/developers/syndication/
5359         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5360         if ($format ne 'rss' && $format ne 'atom') {
5361                 die_error(undef, "Unknown web feed format");
5362         }
5363
5364         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5365         my $head = $hash || 'HEAD';
5366         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5367
5368         my %latest_commit;
5369         my %latest_date;
5370         my $content_type = "application/$format+xml";
5371         if (defined $cgi->http('HTTP_ACCEPT') &&
5372                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5373                 # browser (feed reader) prefers text/xml
5374                 $content_type = 'text/xml';
5375         }
5376         if (defined($commitlist[0])) {
5377                 %latest_commit = %{$commitlist[0]};
5378                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5379                 print $cgi->header(
5380                         -type => $content_type,
5381                         -charset => 'utf-8',
5382                         -last_modified => $latest_date{'rfc2822'});
5383         } else {
5384                 print $cgi->header(
5385                         -type => $content_type,
5386                         -charset => 'utf-8');
5387         }
5388
5389         # Optimization: skip generating the body if client asks only
5390         # for Last-Modified date.
5391         return if ($cgi->request_method() eq 'HEAD');
5392
5393         # header variables
5394         my $title = "$site_name - $project/$action";
5395         my $feed_type = 'log';
5396         if (defined $hash) {
5397                 $title .= " - '$hash'";
5398                 $feed_type = 'branch log';
5399                 if (defined $file_name) {
5400                         $title .= " :: $file_name";
5401                         $feed_type = 'history';
5402                 }
5403         } elsif (defined $file_name) {
5404                 $title .= " - $file_name";
5405                 $feed_type = 'history';
5406         }
5407         $title .= " $feed_type";
5408         my $descr = git_get_project_description($project);
5409         if (defined $descr) {
5410                 $descr = esc_html($descr);
5411         } else {
5412                 $descr = "$project " .
5413                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5414                          " feed";
5415         }
5416         my $owner = git_get_project_owner($project);
5417         $owner = esc_html($owner);
5418
5419         #header
5420         my $alt_url;
5421         if (defined $file_name) {
5422                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5423         } elsif (defined $hash) {
5424                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5425         } else {
5426                 $alt_url = href(-full=>1, action=>"summary");
5427         }
5428         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5429         if ($format eq 'rss') {
5430                 print <<XML;
5431 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5432 <channel>
5433 XML
5434                 print "<title>$title</title>\n" .
5435                       "<link>$alt_url</link>\n" .
5436                       "<description>$descr</description>\n" .
5437                       "<language>en</language>\n";
5438         } elsif ($format eq 'atom') {
5439                 print <<XML;
5440 <feed xmlns="http://www.w3.org/2005/Atom">
5441 XML
5442                 print "<title>$title</title>\n" .
5443                       "<subtitle>$descr</subtitle>\n" .
5444                       '<link rel="alternate" type="text/html" href="' .
5445                       $alt_url . '" />' . "\n" .
5446                       '<link rel="self" type="' . $content_type . '" href="' .
5447                       $cgi->self_url() . '" />' . "\n" .
5448                       "<id>" . href(-full=>1) . "</id>\n" .
5449                       # use project owner for feed author
5450                       "<author><name>$owner</name></author>\n";
5451                 if (defined $favicon) {
5452                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5453                 }
5454                 if (defined $logo_url) {
5455                         # not twice as wide as tall: 72 x 27 pixels
5456                         print "<logo>" . esc_url($logo) . "</logo>\n";
5457                 }
5458                 if (! %latest_date) {
5459                         # dummy date to keep the feed valid until commits trickle in:
5460                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5461                 } else {
5462                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5463                 }
5464         }
5465
5466         # contents
5467         for (my $i = 0; $i <= $#commitlist; $i++) {
5468                 my %co = %{$commitlist[$i]};
5469                 my $commit = $co{'id'};
5470                 # we read 150, we always show 30 and the ones more recent than 48 hours
5471                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5472                         last;
5473                 }
5474                 my %cd = parse_date($co{'author_epoch'});
5475
5476                 # get list of changed files
5477                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5478                         $co{'parent'} || "--root",
5479                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5480                         or next;
5481                 my @difftree = map { chomp; $_ } <$fd>;
5482                 close $fd
5483                         or next;
5484
5485                 # print element (entry, item)
5486                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5487                 if ($format eq 'rss') {
5488                         print "<item>\n" .
5489                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5490                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5491                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5492                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5493                               "<link>$co_url</link>\n" .
5494                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5495                               "<content:encoded>" .
5496                               "<![CDATA[\n";
5497                 } elsif ($format eq 'atom') {
5498                         print "<entry>\n" .
5499                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5500                               "<updated>$cd{'iso-8601'}</updated>\n" .
5501                               "<author>\n" .
5502                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5503                         if ($co{'author_email'}) {
5504                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5505                         }
5506                         print "</author>\n" .
5507                               # use committer for contributor
5508                               "<contributor>\n" .
5509                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5510                         if ($co{'committer_email'}) {
5511                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5512                         }
5513                         print "</contributor>\n" .
5514                               "<published>$cd{'iso-8601'}</published>\n" .
5515                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5516                               "<id>$co_url</id>\n" .
5517                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5518                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5519                 }
5520                 my $comment = $co{'comment'};
5521                 print "<pre>\n";
5522                 foreach my $line (@$comment) {
5523                         $line = esc_html($line);
5524                         print "$line\n";
5525                 }
5526                 print "</pre><ul>\n";
5527                 foreach my $difftree_line (@difftree) {
5528                         my %difftree = parse_difftree_raw_line($difftree_line);
5529                         next if !$difftree{'from_id'};
5530
5531                         my $file = $difftree{'file'} || $difftree{'to_file'};
5532
5533                         print "<li>" .
5534                               "[" .
5535                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5536                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5537                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5538                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5539                                       -title => "diff"}, 'D');
5540                         if ($have_blame) {
5541                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5542                                                              file_name=>$file, hash_base=>$commit),
5543                                               -title => "blame"}, 'B');
5544                         }
5545                         # if this is not a feed of a file history
5546                         if (!defined $file_name || $file_name ne $file) {
5547                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5548                                                              file_name=>$file, hash=>$commit),
5549                                               -title => "history"}, 'H');
5550                         }
5551                         $file = esc_path($file);
5552                         print "] ".
5553                               "$file</li>\n";
5554                 }
5555                 if ($format eq 'rss') {
5556                         print "</ul>]]>\n" .
5557                               "</content:encoded>\n" .
5558                               "</item>\n";
5559                 } elsif ($format eq 'atom') {
5560                         print "</ul>\n</div>\n" .
5561                               "</content>\n" .
5562                               "</entry>\n";
5563                 }
5564         }
5565
5566         # end of feed
5567         if ($format eq 'rss') {
5568                 print "</channel>\n</rss>\n";
5569         }       elsif ($format eq 'atom') {
5570                 print "</feed>\n";
5571         }
5572 }
5573
5574 sub git_rss {
5575         git_feed('rss');
5576 }
5577
5578 sub git_atom {
5579         git_feed('atom');
5580 }
5581
5582 sub git_opml {
5583         my @list = git_get_projects_list();
5584
5585         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5586         print <<XML;
5587 <?xml version="1.0" encoding="utf-8"?>
5588 <opml version="1.0">
5589 <head>
5590   <title>$site_name OPML Export</title>
5591 </head>
5592 <body>
5593 <outline text="git RSS feeds">
5594 XML
5595
5596         foreach my $pr (@list) {
5597                 my %proj = %$pr;
5598                 my $head = git_get_head_hash($proj{'path'});
5599                 if (!defined $head) {
5600                         next;
5601                 }
5602                 $git_dir = "$projectroot/$proj{'path'}";
5603                 my %co = parse_commit($head);
5604                 if (!%co) {
5605                         next;
5606                 }
5607
5608                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5609                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5610                 my $html = "$my_url?p=$proj{'path'};a=summary";
5611                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5612         }
5613         print <<XML;
5614 </outline>
5615 </body>
5616 </opml>
5617 XML
5618 }