gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 if (-e $GITWEB_CONFIG) {
 373         do $GITWEB_CONFIG;
 374 } else {
 375         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 376         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 377 }
 378
 379 # version of the core git binary
 380 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 381
 382 $projects_list ||= $projectroot;
 383
 384 # ======================================================================
 385 # input validation and dispatch
 386 our $action = $cgi->param('a');
 387 if (defined $action) {
 388         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 389                 die_error(undef, "Invalid action parameter");
 390         }
 391 }
 392
 393 # parameters which are pathnames
 394 our $project = $cgi->param('p');
 395 if (defined $project) {
 396         if (!validate_pathname($project) ||
 397             !(-d "$projectroot/$project") ||
 398             !check_head_link("$projectroot/$project") ||
 399             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 400             ($strict_export && !project_in_list($project))) {
 401                 undef $project;
 402                 die_error(undef, "No such project");
 403         }
 404 }
 405
 406 our $file_name = $cgi->param('f');
 407 if (defined $file_name) {
 408         if (!validate_pathname($file_name)) {
 409                 die_error(undef, "Invalid file parameter");
 410         }
 411 }
 412
 413 our $file_parent = $cgi->param('fp');
 414 if (defined $file_parent) {
 415         if (!validate_pathname($file_parent)) {
 416                 die_error(undef, "Invalid file parent parameter");
 417         }
 418 }
 419
 420 # parameters which are refnames
 421 our $hash = $cgi->param('h');
 422 if (defined $hash) {
 423         if (!validate_refname($hash)) {
 424                 die_error(undef, "Invalid hash parameter");
 425         }
 426 }
 427
 428 our $hash_parent = $cgi->param('hp');
 429 if (defined $hash_parent) {
 430         if (!validate_refname($hash_parent)) {
 431                 die_error(undef, "Invalid hash parent parameter");
 432         }
 433 }
 434
 435 our $hash_base = $cgi->param('hb');
 436 if (defined $hash_base) {
 437         if (!validate_refname($hash_base)) {
 438                 die_error(undef, "Invalid hash base parameter");
 439         }
 440 }
 441
 442 my %allowed_options = (
 443         "--no-merges" => [ qw(rss atom log shortlog history) ],
 444 );
 445
 446 our @extra_options = $cgi->param('opt');
 447 if (defined @extra_options) {
 448         foreach my $opt (@extra_options) {
 449                 if (not exists $allowed_options{$opt}) {
 450                         die_error(undef, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(undef, "Invalid option parameter for this action");
 454                 }
 455         }
 456 }
 457
 458 our $hash_parent_base = $cgi->param('hpb');
 459 if (defined $hash_parent_base) {
 460         if (!validate_refname($hash_parent_base)) {
 461                 die_error(undef, "Invalid hash parent base parameter");
 462         }
 463 }
 464
 465 # other parameters
 466 our $page = $cgi->param('pg');
 467 if (defined $page) {
 468         if ($page =~ m/[^0-9]/) {
 469                 die_error(undef, "Invalid page parameter");
 470         }
 471 }
 472
 473 our $searchtype = $cgi->param('st');
 474 if (defined $searchtype) {
 475         if ($searchtype =~ m/[^a-z]/) {
 476                 die_error(undef, "Invalid searchtype parameter");
 477         }
 478 }
 479
 480 our $search_use_regexp = $cgi->param('sr');
 481
 482 our $searchtext = $cgi->param('s');
 483 our $search_regexp;
 484 if (defined $searchtext) {
 485         if (length($searchtext) < 2) {
 486                 die_error(undef, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_blame,
 543         "blobdiff" => \&git_blobdiff,
 544         "blobdiff_plain" => \&git_blobdiff_plain,
 545         "blob" => \&git_blob,
 546         "blob_plain" => \&git_blob_plain,
 547         "commitdiff" => \&git_commitdiff,
 548         "commitdiff_plain" => \&git_commitdiff_plain,
 549         "commit" => \&git_commit,
 550         "forks" => \&git_forks,
 551         "heads" => \&git_heads,
 552         "history" => \&git_history,
 553         "log" => \&git_log,
 554         "rss" => \&git_rss,
 555         "atom" => \&git_atom,
 556         "search" => \&git_search,
 557         "search_help" => \&git_search_help,
 558         "shortlog" => \&git_shortlog,
 559         "summary" => \&git_summary,
 560         "tag" => \&git_tag,
 561         "tags" => \&git_tags,
 562         "tree" => \&git_tree,
 563         "snapshot" => \&git_snapshot,
 564         "object" => \&git_object,
 565         # those below don't need $project
 566         "opml" => \&git_opml,
 567         "project_list" => \&git_project_list,
 568         "project_index" => \&git_project_index,
 569 );
 570
 571 if (!defined $action) {
 572         if (defined $hash) {
 573                 $action = git_get_type($hash);
 574         } elsif (defined $hash_base && defined $file_name) {
 575                 $action = git_get_type("$hash_base:$file_name");
 576         } elsif (defined $project) {
 577                 $action = 'summary';
 578         } else {
 579                 $action = 'project_list';
 580         }
 581 }
 582 if (!defined($actions{$action})) {
 583         die_error(undef, "Unknown action");
 584 }
 585 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 586     !$project) {
 587         die_error(undef, "Project needed");
 588 }
 589 $actions{$action}->();
 590 exit;
 591
 592 ## ======================================================================
 593 ## action links
 594
 595 sub href (%) {
 596         my %params = @_;
 597         # default is to use -absolute url() i.e. $my_uri
 598         my $href = $params{-full} ? $my_url : $my_uri;
 599
 600         # XXX: Warning: If you touch this, check the search form for updating,
 601         # too.
 602
 603         my @mapping = (
 604                 project => "p",
 605                 action => "a",
 606                 file_name => "f",
 607                 file_parent => "fp",
 608                 hash => "h",
 609                 hash_parent => "hp",
 610                 hash_base => "hb",
 611                 hash_parent_base => "hpb",
 612                 page => "pg",
 613                 order => "o",
 614                 searchtext => "s",
 615                 searchtype => "st",
 616                 snapshot_format => "sf",
 617                 extra_options => "opt",
 618                 search_use_regexp => "sr",
 619         );
 620         my %mapping = @mapping;
 621
 622         $params{'project'} = $project unless exists $params{'project'};
 623
 624         if ($params{-replay}) {
 625                 while (my ($name, $symbol) = each %mapping) {
 626                         if (!exists $params{$name}) {
 627                                 # to allow for multivalued params we use arrayref form
 628                                 $params{$name} = [ $cgi->param($symbol) ];
 629                         }
 630                 }
 631         }
 632
 633         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 634         if ($use_pathinfo) {
 635                 # use PATH_INFO for project name
 636                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 637                 delete $params{'project'};
 638
 639                 # Summary just uses the project path URL
 640                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 641                         delete $params{'action'};
 642                 }
 643         }
 644
 645         # now encode the parameters explicitly
 646         my @result = ();
 647         for (my $i = 0; $i < @mapping; $i += 2) {
 648                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 649                 if (defined $params{$name}) {
 650                         if (ref($params{$name}) eq "ARRAY") {
 651                                 foreach my $par (@{$params{$name}}) {
 652                                         push @result, $symbol . "=" . esc_param($par);
 653                                 }
 654                         } else {
 655                                 push @result, $symbol . "=" . esc_param($params{$name});
 656                         }
 657                 }
 658         }
 659         $href .= "?" . join(';', @result) if scalar @result;
 660
 661         return $href;
 662 }
 663
 664
 665 ## ======================================================================
 666 ## validation, quoting/unquoting and escaping
 667
 668 sub validate_pathname {
 669         my $input = shift || return undef;
 670
 671         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 672         # at the beginning, at the end, and between slashes.
 673         # also this catches doubled slashes
 674         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 675                 return undef;
 676         }
 677         # no null characters
 678         if ($input =~ m!\0!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 sub validate_refname {
 685         my $input = shift || return undef;
 686
 687         # textual hashes are O.K.
 688         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 689                 return $input;
 690         }
 691         # it must be correct pathname
 692         $input = validate_pathname($input)
 693                 or return undef;
 694         # restrictions on ref name according to git-check-ref-format
 695         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 696                 return undef;
 697         }
 698         return $input;
 699 }
 700
 701 # decode sequences of octets in utf8 into Perl's internal form,
 702 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 703 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 704 sub to_utf8 {
 705         my $str = shift;
 706         if (utf8::valid($str)) {
 707                 utf8::decode($str);
 708                 return $str;
 709         } else {
 710                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 711         }
 712 }
 713
 714 # quote unsafe chars, but keep the slash, even when it's not
 715 # correct, but quoted slashes look too horrible in bookmarks
 716 sub esc_param {
 717         my $str = shift;
 718         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 719         $str =~ s/\+/%2B/g;
 720         $str =~ s/ /\+/g;
 721         return $str;
 722 }
 723
 724 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 725 sub esc_url {
 726         my $str = shift;
 727         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 728         $str =~ s/\+/%2B/g;
 729         $str =~ s/ /\+/g;
 730         return $str;
 731 }
 732
 733 # replace invalid utf8 character with SUBSTITUTION sequence
 734 sub esc_html ($;%) {
 735         my $str = shift;
 736         my %opts = @_;
 737
 738         $str = to_utf8($str);
 739         $str = $cgi->escapeHTML($str);
 740         if ($opts{'-nbsp'}) {
 741                 $str =~ s/ /&nbsp;/g;
 742         }
 743         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 744         return $str;
 745 }
 746
 747 # quote control characters and escape filename to HTML
 748 sub esc_path {
 749         my $str = shift;
 750         my %opts = @_;
 751
 752         $str = to_utf8($str);
 753         $str = $cgi->escapeHTML($str);
 754         if ($opts{'-nbsp'}) {
 755                 $str =~ s/ /&nbsp;/g;
 756         }
 757         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 758         return $str;
 759 }
 760
 761 # Make control characters "printable", using character escape codes (CEC)
 762 sub quot_cec {
 763         my $cntrl = shift;
 764         my %opts = @_;
 765         my %es = ( # character escape codes, aka escape sequences
 766                 "\t" => '\t',   # tab            (HT)
 767                 "\n" => '\n',   # line feed      (LF)
 768                 "\r" => '\r',   # carrige return (CR)
 769                 "\f" => '\f',   # form feed      (FF)
 770                 "\b" => '\b',   # backspace      (BS)
 771                 "\a" => '\a',   # alarm (bell)   (BEL)
 772                 "\e" => '\e',   # escape         (ESC)
 773                 "\013" => '\v', # vertical tab   (VT)
 774                 "\000" => '\0', # nul character  (NUL)
 775         );
 776         my $chr = ( (exists $es{$cntrl})
 777                     ? $es{$cntrl}
 778                     : sprintf('\%03o', ord($cntrl)) );
 779         if ($opts{-nohtml}) {
 780                 return $chr;
 781         } else {
 782                 return "<span class=\"cntrl\">$chr</span>";
 783         }
 784 }
 785
 786 # Alternatively use unicode control pictures codepoints,
 787 # Unicode "printable representation" (PR)
 788 sub quot_upr {
 789         my $cntrl = shift;
 790         my %opts = @_;
 791
 792         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 793         if ($opts{-nohtml}) {
 794                 return $chr;
 795         } else {
 796                 return "<span class=\"cntrl\">$chr</span>";
 797         }
 798 }
 799
 800 # git may return quoted and escaped filenames
 801 sub unquote {
 802         my $str = shift;
 803
 804         sub unq {
 805                 my $seq = shift;
 806                 my %es = ( # character escape codes, aka escape sequences
 807                         't' => "\t",   # tab            (HT, TAB)
 808                         'n' => "\n",   # newline        (NL)
 809                         'r' => "\r",   # return         (CR)
 810                         'f' => "\f",   # form feed      (FF)
 811                         'b' => "\b",   # backspace      (BS)
 812                         'a' => "\a",   # alarm (bell)   (BEL)
 813                         'e' => "\e",   # escape         (ESC)
 814                         'v' => "\013", # vertical tab   (VT)
 815                 );
 816
 817                 if ($seq =~ m/^[0-7]{1,3}$/) {
 818                         # octal char sequence
 819                         return chr(oct($seq));
 820                 } elsif (exists $es{$seq}) {
 821                         # C escape sequence, aka character escape code
 822                         return $es{$seq};
 823                 }
 824                 # quoted ordinary character
 825                 return $seq;
 826         }
 827
 828         if ($str =~ m/^"(.*)"$/) {
 829                 # needs unquoting
 830                 $str = $1;
 831                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 832         }
 833         return $str;
 834 }
 835
 836 # escape tabs (convert tabs to spaces)
 837 sub untabify {
 838         my $line = shift;
 839
 840         while ((my $pos = index($line, "\t")) != -1) {
 841                 if (my $count = (8 - ($pos % 8))) {
 842                         my $spaces = ' ' x $count;
 843                         $line =~ s/\t/$spaces/;
 844                 }
 845         }
 846
 847         return $line;
 848 }
 849
 850 sub project_in_list {
 851         my $project = shift;
 852         my @list = git_get_projects_list();
 853         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 854 }
 855
 856 ## ----------------------------------------------------------------------
 857 ## HTML aware string manipulation
 858
 859 # Try to chop given string on a word boundary between position
 860 # $len and $len+$add_len. If there is no word boundary there,
 861 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 862 # (marking chopped part) would be longer than given string.
 863 sub chop_str {
 864         my $str = shift;
 865         my $len = shift;
 866         my $add_len = shift || 10;
 867         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 868
 869         # Make sure perl knows it is utf8 encoded so we don't
 870         # cut in the middle of a utf8 multibyte char.
 871         $str = to_utf8($str);
 872
 873         # allow only $len chars, but don't cut a word if it would fit in $add_len
 874         # if it doesn't fit, cut it if it's still longer than the dots we would add
 875         # remove chopped character entities entirely
 876
 877         # when chopping in the middle, distribute $len into left and right part
 878         # return early if chopping wouldn't make string shorter
 879         if ($where eq 'center') {
 880                 return $str if ($len + 5 >= length($str)); # filler is length 5
 881                 $len = int($len/2);
 882         } else {
 883                 return $str if ($len + 4 >= length($str)); # filler is length 4
 884         }
 885
 886         # regexps: ending and beginning with word part up to $add_len
 887         my $endre = qr/.{$len}\w{0,$add_len}/;
 888         my $begre = qr/\w{0,$add_len}.{$len}/;
 889
 890         if ($where eq 'left') {
 891                 $str =~ m/^(.*?)($begre)$/;
 892                 my ($lead, $body) = ($1, $2);
 893                 if (length($lead) > 4) {
 894                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 895                         $lead = " ...";
 896                 }
 897                 return "$lead$body";
 898
 899         } elsif ($where eq 'center') {
 900                 $str =~ m/^($endre)(.*)$/;
 901                 my ($left, $str)  = ($1, $2);
 902                 $str =~ m/^(.*?)($begre)$/;
 903                 my ($mid, $right) = ($1, $2);
 904                 if (length($mid) > 5) {
 905                         $left  =~ s/&[^;]*$//;
 906                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 907                         $mid = " ... ";
 908                 }
 909                 return "$left$mid$right";
 910
 911         } else {
 912                 $str =~ m/^($endre)(.*)$/;
 913                 my $body = $1;
 914                 my $tail = $2;
 915                 if (length($tail) > 4) {
 916                         $body =~ s/&[^;]*$//;
 917                         $tail = "... ";
 918                 }
 919                 return "$body$tail";
 920         }
 921 }
 922
 923 # takes the same arguments as chop_str, but also wraps a <span> around the
 924 # result with a title attribute if it does get chopped. Additionally, the
 925 # string is HTML-escaped.
 926 sub chop_and_escape_str {
 927         my ($str) = @_;
 928
 929         my $chopped = chop_str(@_);
 930         if ($chopped eq $str) {
 931                 return esc_html($chopped);
 932         } else {
 933                 $str =~ s/([[:cntrl:]])/?/g;
 934                 return $cgi->span({-title=>$str}, esc_html($chopped));
 935         }
 936 }
 937
 938 ## ----------------------------------------------------------------------
 939 ## functions returning short strings
 940
 941 # CSS class for given age value (in seconds)
 942 sub age_class {
 943         my $age = shift;
 944
 945         if (!defined $age) {
 946                 return "noage";
 947         } elsif ($age < 60*60*2) {
 948                 return "age0";
 949         } elsif ($age < 60*60*24*2) {
 950                 return "age1";
 951         } else {
 952                 return "age2";
 953         }
 954 }
 955
 956 # convert age in seconds to "nn units ago" string
 957 sub age_string {
 958         my $age = shift;
 959         my $age_str;
 960
 961         if ($age > 60*60*24*365*2) {
 962                 $age_str = (int $age/60/60/24/365);
 963                 $age_str .= " years ago";
 964         } elsif ($age > 60*60*24*(365/12)*2) {
 965                 $age_str = int $age/60/60/24/(365/12);
 966                 $age_str .= " months ago";
 967         } elsif ($age > 60*60*24*7*2) {
 968                 $age_str = int $age/60/60/24/7;
 969                 $age_str .= " weeks ago";
 970         } elsif ($age > 60*60*24*2) {
 971                 $age_str = int $age/60/60/24;
 972                 $age_str .= " days ago";
 973         } elsif ($age > 60*60*2) {
 974                 $age_str = int $age/60/60;
 975                 $age_str .= " hours ago";
 976         } elsif ($age > 60*2) {
 977                 $age_str = int $age/60;
 978                 $age_str .= " min ago";
 979         } elsif ($age > 2) {
 980                 $age_str = int $age;
 981                 $age_str .= " sec ago";
 982         } else {
 983                 $age_str .= " right now";
 984         }
 985         return $age_str;
 986 }
 987
 988 use constant {
 989         S_IFINVALID => 0030000,
 990         S_IFGITLINK => 0160000,
 991 };
 992
 993 # submodule/subproject, a commit object reference
 994 sub S_ISGITLINK($) {
 995         my $mode = shift;
 996
 997         return (($mode & S_IFMT) == S_IFGITLINK)
 998 }
 999
1000 # convert file mode in octal to symbolic file mode string
1001 sub mode_str {
1002         my $mode = oct shift;
1003
1004         if (S_ISGITLINK($mode)) {
1005                 return 'm---------';
1006         } elsif (S_ISDIR($mode & S_IFMT)) {
1007                 return 'drwxr-xr-x';
1008         } elsif (S_ISLNK($mode)) {
1009                 return 'lrwxrwxrwx';
1010         } elsif (S_ISREG($mode)) {
1011                 # git cares only about the executable bit
1012                 if ($mode & S_IXUSR) {
1013                         return '-rwxr-xr-x';
1014                 } else {
1015                         return '-rw-r--r--';
1016                 };
1017         } else {
1018                 return '----------';
1019         }
1020 }
1021
1022 # convert file mode in octal to file type string
1023 sub file_type {
1024         my $mode = shift;
1025
1026         if ($mode !~ m/^[0-7]+$/) {
1027                 return $mode;
1028         } else {
1029                 $mode = oct $mode;
1030         }
1031
1032         if (S_ISGITLINK($mode)) {
1033                 return "submodule";
1034         } elsif (S_ISDIR($mode & S_IFMT)) {
1035                 return "directory";
1036         } elsif (S_ISLNK($mode)) {
1037                 return "symlink";
1038         } elsif (S_ISREG($mode)) {
1039                 return "file";
1040         } else {
1041                 return "unknown";
1042         }
1043 }
1044
1045 # convert file mode in octal to file type description string
1046 sub file_type_long {
1047         my $mode = shift;
1048
1049         if ($mode !~ m/^[0-7]+$/) {
1050                 return $mode;
1051         } else {
1052                 $mode = oct $mode;
1053         }
1054
1055         if (S_ISGITLINK($mode)) {
1056                 return "submodule";
1057         } elsif (S_ISDIR($mode & S_IFMT)) {
1058                 return "directory";
1059         } elsif (S_ISLNK($mode)) {
1060                 return "symlink";
1061         } elsif (S_ISREG($mode)) {
1062                 if ($mode & S_IXUSR) {
1063                         return "executable";
1064                 } else {
1065                         return "file";
1066                 };
1067         } else {
1068                 return "unknown";
1069         }
1070 }
1071
1072
1073 ## ----------------------------------------------------------------------
1074 ## functions returning short HTML fragments, or transforming HTML fragments
1075 ## which don't belong to other sections
1076
1077 # format line of commit message.
1078 sub format_log_line_html {
1079         my $line = shift;
1080
1081         $line = esc_html($line, -nbsp=>1);
1082         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1083                 my $hash_text = $1;
1084                 my $link =
1085                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1086                                 -class => "text"}, $hash_text);
1087                 $line =~ s/$hash_text/$link/;
1088         }
1089         return $line;
1090 }
1091
1092 # format marker of refs pointing to given object
1093 sub format_ref_marker {
1094         my ($refs, $id) = @_;
1095         my $markers = '';
1096
1097         if (defined $refs->{$id}) {
1098                 foreach my $ref (@{$refs->{$id}}) {
1099                         my ($type, $name) = qw();
1100                         # e.g. tags/v2.6.11 or heads/next
1101                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1102                                 $type = $1;
1103                                 $name = $2;
1104                         } else {
1105                                 $type = "ref";
1106                                 $name = $ref;
1107                         }
1108
1109                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1110                                     esc_html($name) . "</span>";
1111                 }
1112         }
1113
1114         if ($markers) {
1115                 return ' <span class="refs">'. $markers . '</span>';
1116         } else {
1117                 return "";
1118         }
1119 }
1120
1121 # format, perhaps shortened and with markers, title line
1122 sub format_subject_html {
1123         my ($long, $short, $href, $extra) = @_;
1124         $extra = '' unless defined($extra);
1125
1126         if (length($short) < length($long)) {
1127                 return $cgi->a({-href => $href, -class => "list subject",
1128                                 -title => to_utf8($long)},
1129                        esc_html($short) . $extra);
1130         } else {
1131                 return $cgi->a({-href => $href, -class => "list subject"},
1132                        esc_html($long)  . $extra);
1133         }
1134 }
1135
1136 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1137 sub format_git_diff_header_line {
1138         my $line = shift;
1139         my $diffinfo = shift;
1140         my ($from, $to) = @_;
1141
1142         if ($diffinfo->{'nparents'}) {
1143                 # combined diff
1144                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1145                 if ($to->{'href'}) {
1146                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1147                                          esc_path($to->{'file'}));
1148                 } else { # file was deleted (no href)
1149                         $line .= esc_path($to->{'file'});
1150                 }
1151         } else {
1152                 # "ordinary" diff
1153                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1154                 if ($from->{'href'}) {
1155                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1156                                          'a/' . esc_path($from->{'file'}));
1157                 } else { # file was added (no href)
1158                         $line .= 'a/' . esc_path($from->{'file'});
1159                 }
1160                 $line .= ' ';
1161                 if ($to->{'href'}) {
1162                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1163                                          'b/' . esc_path($to->{'file'}));
1164                 } else { # file was deleted
1165                         $line .= 'b/' . esc_path($to->{'file'});
1166                 }
1167         }
1168
1169         return "<div class=\"diff header\">$line</div>\n";
1170 }
1171
1172 # format extended diff header line, before patch itself
1173 sub format_extended_diff_header_line {
1174         my $line = shift;
1175         my $diffinfo = shift;
1176         my ($from, $to) = @_;
1177
1178         # match <path>
1179         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1180                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1181                                        esc_path($from->{'file'}));
1182         }
1183         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1184                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1185                                  esc_path($to->{'file'}));
1186         }
1187         # match single <mode>
1188         if ($line =~ m/\s(\d{6})$/) {
1189                 $line .= '<span class="info"> (' .
1190                          file_type_long($1) .
1191                          ')</span>';
1192         }
1193         # match <hash>
1194         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1195                 # can match only for combined diff
1196                 $line = 'index ';
1197                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1198                         if ($from->{'href'}[$i]) {
1199                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1200                                                   -class=>"hash"},
1201                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1202                         } else {
1203                                 $line .= '0' x 7;
1204                         }
1205                         # separator
1206                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1207                 }
1208                 $line .= '..';
1209                 if ($to->{'href'}) {
1210                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1211                                          substr($diffinfo->{'to_id'},0,7));
1212                 } else {
1213                         $line .= '0' x 7;
1214                 }
1215
1216         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1217                 # can match only for ordinary diff
1218                 my ($from_link, $to_link);
1219                 if ($from->{'href'}) {
1220                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1221                                              substr($diffinfo->{'from_id'},0,7));
1222                 } else {
1223                         $from_link = '0' x 7;
1224                 }
1225                 if ($to->{'href'}) {
1226                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1227                                            substr($diffinfo->{'to_id'},0,7));
1228                 } else {
1229                         $to_link = '0' x 7;
1230                 }
1231                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1232                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1233         }
1234
1235         return $line . "<br/>\n";
1236 }
1237
1238 # format from-file/to-file diff header
1239 sub format_diff_from_to_header {
1240         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1241         my $line;
1242         my $result = '';
1243
1244         $line = $from_line;
1245         #assert($line =~ m/^---/) if DEBUG;
1246         # no extra formatting for "^--- /dev/null"
1247         if (! $diffinfo->{'nparents'}) {
1248                 # ordinary (single parent) diff
1249                 if ($line =~ m!^--- "?a/!) {
1250                         if ($from->{'href'}) {
1251                                 $line = '--- a/' .
1252                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1253                                                 esc_path($from->{'file'}));
1254                         } else {
1255                                 $line = '--- a/' .
1256                                         esc_path($from->{'file'});
1257                         }
1258                 }
1259                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1260
1261         } else {
1262                 # combined diff (merge commit)
1263                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1264                         if ($from->{'href'}[$i]) {
1265                                 $line = '--- ' .
1266                                         $cgi->a({-href=>href(action=>"blobdiff",
1267                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1268                                                              hash_parent_base=>$parents[$i],
1269                                                              file_parent=>$from->{'file'}[$i],
1270                                                              hash=>$diffinfo->{'to_id'},
1271                                                              hash_base=>$hash,
1272                                                              file_name=>$to->{'file'}),
1273                                                  -class=>"path",
1274                                                  -title=>"diff" . ($i+1)},
1275                                                 $i+1) .
1276                                         '/' .
1277                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1278                                                 esc_path($from->{'file'}[$i]));
1279                         } else {
1280                                 $line = '--- /dev/null';
1281                         }
1282                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1283                 }
1284         }
1285
1286         $line = $to_line;
1287         #assert($line =~ m/^\+\+\+/) if DEBUG;
1288         # no extra formatting for "^+++ /dev/null"
1289         if ($line =~ m!^\+\+\+ "?b/!) {
1290                 if ($to->{'href'}) {
1291                         $line = '+++ b/' .
1292                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1293                                         esc_path($to->{'file'}));
1294                 } else {
1295                         $line = '+++ b/' .
1296                                 esc_path($to->{'file'});
1297                 }
1298         }
1299         $result .= qq!<div class="diff to_file">$line</div>\n!;
1300
1301         return $result;
1302 }
1303
1304 # create note for patch simplified by combined diff
1305 sub format_diff_cc_simplified {
1306         my ($diffinfo, @parents) = @_;
1307         my $result = '';
1308
1309         $result .= "<div class=\"diff header\">" .
1310                    "diff --cc ";
1311         if (!is_deleted($diffinfo)) {
1312                 $result .= $cgi->a({-href => href(action=>"blob",
1313                                                   hash_base=>$hash,
1314                                                   hash=>$diffinfo->{'to_id'},
1315                                                   file_name=>$diffinfo->{'to_file'}),
1316                                     -class => "path"},
1317                                    esc_path($diffinfo->{'to_file'}));
1318         } else {
1319                 $result .= esc_path($diffinfo->{'to_file'});
1320         }
1321         $result .= "</div>\n" . # class="diff header"
1322                    "<div class=\"diff nodifferences\">" .
1323                    "Simple merge" .
1324                    "</div>\n"; # class="diff nodifferences"
1325
1326         return $result;
1327 }
1328
1329 # format patch (diff) line (not to be used for diff headers)
1330 sub format_diff_line {
1331         my $line = shift;
1332         my ($from, $to) = @_;
1333         my $diff_class = "";
1334
1335         chomp $line;
1336
1337         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1338                 # combined diff
1339                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1340                 if ($line =~ m/^\@{3}/) {
1341                         $diff_class = " chunk_header";
1342                 } elsif ($line =~ m/^\\/) {
1343                         $diff_class = " incomplete";
1344                 } elsif ($prefix =~ tr/+/+/) {
1345                         $diff_class = " add";
1346                 } elsif ($prefix =~ tr/-/-/) {
1347                         $diff_class = " rem";
1348                 }
1349         } else {
1350                 # assume ordinary diff
1351                 my $char = substr($line, 0, 1);
1352                 if ($char eq '+') {
1353                         $diff_class = " add";
1354                 } elsif ($char eq '-') {
1355                         $diff_class = " rem";
1356                 } elsif ($char eq '@') {
1357                         $diff_class = " chunk_header";
1358                 } elsif ($char eq "\\") {
1359                         $diff_class = " incomplete";
1360                 }
1361         }
1362         $line = untabify($line);
1363         if ($from && $to && $line =~ m/^\@{2} /) {
1364                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1365                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1366
1367                 $from_lines = 0 unless defined $from_lines;
1368                 $to_lines   = 0 unless defined $to_lines;
1369
1370                 if ($from->{'href'}) {
1371                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1372                                              -class=>"list"}, $from_text);
1373                 }
1374                 if ($to->{'href'}) {
1375                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1376                                              -class=>"list"}, $to_text);
1377                 }
1378                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1379                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1380                 return "<div class=\"diff$diff_class\">$line</div>\n";
1381         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1382                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1383                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1384
1385                 @from_text = split(' ', $ranges);
1386                 for (my $i = 0; $i < @from_text; ++$i) {
1387                         ($from_start[$i], $from_nlines[$i]) =
1388                                 (split(',', substr($from_text[$i], 1)), 0);
1389                 }
1390
1391                 $to_text   = pop @from_text;
1392                 $to_start  = pop @from_start;
1393                 $to_nlines = pop @from_nlines;
1394
1395                 $line = "<span class=\"chunk_info\">$prefix ";
1396                 for (my $i = 0; $i < @from_text; ++$i) {
1397                         if ($from->{'href'}[$i]) {
1398                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1399                                                   -class=>"list"}, $from_text[$i]);
1400                         } else {
1401                                 $line .= $from_text[$i];
1402                         }
1403                         $line .= " ";
1404                 }
1405                 if ($to->{'href'}) {
1406                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1407                                           -class=>"list"}, $to_text);
1408                 } else {
1409                         $line .= $to_text;
1410                 }
1411                 $line .= " $prefix</span>" .
1412                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1413                 return "<div class=\"diff$diff_class\">$line</div>\n";
1414         }
1415         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1416 }
1417
1418 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1419 # linked.  Pass the hash of the tree/commit to snapshot.
1420 sub format_snapshot_links {
1421         my ($hash) = @_;
1422         my @snapshot_fmts = gitweb_check_feature('snapshot');
1423         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1424         my $num_fmts = @snapshot_fmts;
1425         if ($num_fmts > 1) {
1426                 # A parenthesized list of links bearing format names.
1427                 # e.g. "snapshot (_tar.gz_ _zip_)"
1428                 return "snapshot (" . join(' ', map
1429                         $cgi->a({
1430                                 -href => href(
1431                                         action=>"snapshot",
1432                                         hash=>$hash,
1433                                         snapshot_format=>$_
1434                                 )
1435                         }, $known_snapshot_formats{$_}{'display'})
1436                 , @snapshot_fmts) . ")";
1437         } elsif ($num_fmts == 1) {
1438                 # A single "snapshot" link whose tooltip bears the format name.
1439                 # i.e. "_snapshot_"
1440                 my ($fmt) = @snapshot_fmts;
1441                 return
1442                         $cgi->a({
1443                                 -href => href(
1444                                         action=>"snapshot",
1445                                         hash=>$hash,
1446                                         snapshot_format=>$fmt
1447                                 ),
1448                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1449                         }, "snapshot");
1450         } else { # $num_fmts == 0
1451                 return undef;
1452         }
1453 }
1454
1455 ## ......................................................................
1456 ## functions returning values to be passed, perhaps after some
1457 ## transformation, to other functions; e.g. returning arguments to href()
1458
1459 # returns hash to be passed to href to generate gitweb URL
1460 # in -title key it returns description of link
1461 sub get_feed_info {
1462         my $format = shift || 'Atom';
1463         my %res = (action => lc($format));
1464
1465         # feed links are possible only for project views
1466         return unless (defined $project);
1467         # some views should link to OPML, or to generic project feed,
1468         # or don't have specific feed yet (so they should use generic)
1469         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1470
1471         my $branch;
1472         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1473         # from tag links; this also makes possible to detect branch links
1474         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1475             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1476                 $branch = $1;
1477         }
1478         # find log type for feed description (title)
1479         my $type = 'log';
1480         if (defined $file_name) {
1481                 $type  = "history of $file_name";
1482                 $type .= "/" if ($action eq 'tree');
1483                 $type .= " on '$branch'" if (defined $branch);
1484         } else {
1485                 $type = "log of $branch" if (defined $branch);
1486         }
1487
1488         $res{-title} = $type;
1489         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1490         $res{'file_name'} = $file_name;
1491
1492         return %res;
1493 }
1494
1495 ## ----------------------------------------------------------------------
1496 ## git utility subroutines, invoking git commands
1497
1498 # returns path to the core git executable and the --git-dir parameter as list
1499 sub git_cmd {
1500         return $GIT, '--git-dir='.$git_dir;
1501 }
1502
1503 # quote the given arguments for passing them to the shell
1504 # quote_command("command", "arg 1", "arg with ' and ! characters")
1505 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1506 # Try to avoid using this function wherever possible.
1507 sub quote_command {
1508         return join(' ',
1509                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1510 }
1511
1512 # get HEAD ref of given project as hash
1513 sub git_get_head_hash {
1514         my $project = shift;
1515         my $o_git_dir = $git_dir;
1516         my $retval = undef;
1517         $git_dir = "$projectroot/$project";
1518         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1519                 my $head = <$fd>;
1520                 close $fd;
1521                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1522                         $retval = $1;
1523                 }
1524         }
1525         if (defined $o_git_dir) {
1526                 $git_dir = $o_git_dir;
1527         }
1528         return $retval;
1529 }
1530
1531 # get type of given object
1532 sub git_get_type {
1533         my $hash = shift;
1534
1535         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1536         my $type = <$fd>;
1537         close $fd or return;
1538         chomp $type;
1539         return $type;
1540 }
1541
1542 # repository configuration
1543 our $config_file = '';
1544 our %config;
1545
1546 # store multiple values for single key as anonymous array reference
1547 # single values stored directly in the hash, not as [ <value> ]
1548 sub hash_set_multi {
1549         my ($hash, $key, $value) = @_;
1550
1551         if (!exists $hash->{$key}) {
1552                 $hash->{$key} = $value;
1553         } elsif (!ref $hash->{$key}) {
1554                 $hash->{$key} = [ $hash->{$key}, $value ];
1555         } else {
1556                 push @{$hash->{$key}}, $value;
1557         }
1558 }
1559
1560 # return hash of git project configuration
1561 # optionally limited to some section, e.g. 'gitweb'
1562 sub git_parse_project_config {
1563         my $section_regexp = shift;
1564         my %config;
1565
1566         local $/ = "\0";
1567
1568         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1569                 or return;
1570
1571         while (my $keyval = <$fh>) {
1572                 chomp $keyval;
1573                 my ($key, $value) = split(/\n/, $keyval, 2);
1574
1575                 hash_set_multi(\%config, $key, $value)
1576                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1577         }
1578         close $fh;
1579
1580         return %config;
1581 }
1582
1583 # convert config value to boolean, 'true' or 'false'
1584 # no value, number > 0, 'true' and 'yes' values are true
1585 # rest of values are treated as false (never as error)
1586 sub config_to_bool {
1587         my $val = shift;
1588
1589         # strip leading and trailing whitespace
1590         $val =~ s/^\s+//;
1591         $val =~ s/\s+$//;
1592
1593         return (!defined $val ||               # section.key
1594                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1595                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1596 }
1597
1598 # convert config value to simple decimal number
1599 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1600 # to be multiplied by 1024, 1048576, or 1073741824
1601 sub config_to_int {
1602         my $val = shift;
1603
1604         # strip leading and trailing whitespace
1605         $val =~ s/^\s+//;
1606         $val =~ s/\s+$//;
1607
1608         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1609                 $unit = lc($unit);
1610                 # unknown unit is treated as 1
1611                 return $num * ($unit eq 'g' ? 1073741824 :
1612                                $unit eq 'm' ?    1048576 :
1613                                $unit eq 'k' ?       1024 : 1);
1614         }
1615         return $val;
1616 }
1617
1618 # convert config value to array reference, if needed
1619 sub config_to_multi {
1620         my $val = shift;
1621
1622         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1623 }
1624
1625 sub git_get_project_config {
1626         my ($key, $type) = @_;
1627
1628         # key sanity check
1629         return unless ($key);
1630         $key =~ s/^gitweb\.//;
1631         return if ($key =~ m/\W/);
1632
1633         # type sanity check
1634         if (defined $type) {
1635                 $type =~ s/^--//;
1636                 $type = undef
1637                         unless ($type eq 'bool' || $type eq 'int');
1638         }
1639
1640         # get config
1641         if (!defined $config_file ||
1642             $config_file ne "$git_dir/config") {
1643                 %config = git_parse_project_config('gitweb');
1644                 $config_file = "$git_dir/config";
1645         }
1646
1647         # ensure given type
1648         if (!defined $type) {
1649                 return $config{"gitweb.$key"};
1650         } elsif ($type eq 'bool') {
1651                 # backward compatibility: 'git config --bool' returns true/false
1652                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1653         } elsif ($type eq 'int') {
1654                 return config_to_int($config{"gitweb.$key"});
1655         }
1656         return $config{"gitweb.$key"};
1657 }
1658
1659 # get hash of given path at given ref
1660 sub git_get_hash_by_path {
1661         my $base = shift;
1662         my $path = shift || return undef;
1663         my $type = shift;
1664
1665         $path =~ s,/+$,,;
1666
1667         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1668                 or die_error(undef, "Open git-ls-tree failed");
1669         my $line = <$fd>;
1670         close $fd or return undef;
1671
1672         if (!defined $line) {
1673                 # there is no tree or hash given by $path at $base
1674                 return undef;
1675         }
1676
1677         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1678         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1679         if (defined $type && $type ne $2) {
1680                 # type doesn't match
1681                 return undef;
1682         }
1683         return $3;
1684 }
1685
1686 # get path of entry with given hash at given tree-ish (ref)
1687 # used to get 'from' filename for combined diff (merge commit) for renames
1688 sub git_get_path_by_hash {
1689         my $base = shift || return;
1690         my $hash = shift || return;
1691
1692         local $/ = "\0";
1693
1694         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1695                 or return undef;
1696         while (my $line = <$fd>) {
1697                 chomp $line;
1698
1699                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1700                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1701                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1702                         close $fd;
1703                         return $1;
1704                 }
1705         }
1706         close $fd;
1707         return undef;
1708 }
1709
1710 ## ......................................................................
1711 ## git utility functions, directly accessing git repository
1712
1713 sub git_get_project_description {
1714         my $path = shift;
1715
1716         $git_dir = "$projectroot/$path";
1717         open my $fd, "$git_dir/description"
1718                 or return git_get_project_config('description');
1719         my $descr = <$fd>;
1720         close $fd;
1721         if (defined $descr) {
1722                 chomp $descr;
1723         }
1724         return $descr;
1725 }
1726
1727 sub git_get_project_url_list {
1728         my $path = shift;
1729
1730         $git_dir = "$projectroot/$path";
1731         open my $fd, "$git_dir/cloneurl"
1732                 or return wantarray ?
1733                 @{ config_to_multi(git_get_project_config('url')) } :
1734                    config_to_multi(git_get_project_config('url'));
1735         my @git_project_url_list = map { chomp; $_ } <$fd>;
1736         close $fd;
1737
1738         return wantarray ? @git_project_url_list : \@git_project_url_list;
1739 }
1740
1741 sub git_get_projects_list {
1742         my ($filter) = @_;
1743         my @list;
1744
1745         $filter ||= '';
1746         $filter =~ s/\.git$//;
1747
1748         my ($check_forks) = gitweb_check_feature('forks');
1749
1750         if (-d $projects_list) {
1751                 # search in directory
1752                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1753                 # remove the trailing "/"
1754                 $dir =~ s!/+$!!;
1755                 my $pfxlen = length("$dir");
1756                 my $pfxdepth = ($dir =~ tr!/!!);
1757
1758                 File::Find::find({
1759                         follow_fast => 1, # follow symbolic links
1760                         follow_skip => 2, # ignore duplicates
1761                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1762                         wanted => sub {
1763                                 # skip project-list toplevel, if we get it.
1764                                 return if (m!^[/.]$!);
1765                                 # only directories can be git repositories
1766                                 return unless (-d $_);
1767                                 # don't traverse too deep (Find is super slow on os x)
1768                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1769                                         $File::Find::prune = 1;
1770                                         return;
1771                                 }
1772
1773                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1774                                 # we check related file in $projectroot
1775                                 if ($check_forks and $subdir =~ m#/.#) {
1776                                         $File::Find::prune = 1;
1777                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1778                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1779                                         $File::Find::prune = 1;
1780                                 }
1781                         },
1782                 }, "$dir");
1783
1784         } elsif (-f $projects_list) {
1785                 # read from file(url-encoded):
1786                 # 'git%2Fgit.git Linus+Torvalds'
1787                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1788                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1789                 my %paths;
1790                 open my ($fd), $projects_list or return;
1791         PROJECT:
1792                 while (my $line = <$fd>) {
1793                         chomp $line;
1794                         my ($path, $owner) = split ' ', $line;
1795                         $path = unescape($path);
1796                         $owner = unescape($owner);
1797                         if (!defined $path) {
1798                                 next;
1799                         }
1800                         if ($filter ne '') {
1801                                 # looking for forks;
1802                                 my $pfx = substr($path, 0, length($filter));
1803                                 if ($pfx ne $filter) {
1804                                         next PROJECT;
1805                                 }
1806                                 my $sfx = substr($path, length($filter));
1807                                 if ($sfx !~ /^\/.*\.git$/) {
1808                                         next PROJECT;
1809                                 }
1810                         } elsif ($check_forks) {
1811                         PATH:
1812                                 foreach my $filter (keys %paths) {
1813                                         # looking for forks;
1814                                         my $pfx = substr($path, 0, length($filter));
1815                                         if ($pfx ne $filter) {
1816                                                 next PATH;
1817                                         }
1818                                         my $sfx = substr($path, length($filter));
1819                                         if ($sfx !~ /^\/.*\.git$/) {
1820                                                 next PATH;
1821                                         }
1822                                         # is a fork, don't include it in
1823                                         # the list
1824                                         next PROJECT;
1825                                 }
1826                         }
1827                         if (check_export_ok("$projectroot/$path")) {
1828                                 my $pr = {
1829                                         path => $path,
1830                                         owner => to_utf8($owner),
1831                                 };
1832                                 push @list, $pr;
1833                                 (my $forks_path = $path) =~ s/\.git$//;
1834                                 $paths{$forks_path}++;
1835                         }
1836                 }
1837                 close $fd;
1838         }
1839         return @list;
1840 }
1841
1842 our $gitweb_project_owner = undef;
1843 sub git_get_project_list_from_file {
1844
1845         return if (defined $gitweb_project_owner);
1846
1847         $gitweb_project_owner = {};
1848         # read from file (url-encoded):
1849         # 'git%2Fgit.git Linus+Torvalds'
1850         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1851         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1852         if (-f $projects_list) {
1853                 open (my $fd , $projects_list);
1854                 while (my $line = <$fd>) {
1855                         chomp $line;
1856                         my ($pr, $ow) = split ' ', $line;
1857                         $pr = unescape($pr);
1858                         $ow = unescape($ow);
1859                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1860                 }
1861                 close $fd;
1862         }
1863 }
1864
1865 sub git_get_project_owner {
1866         my $project = shift;
1867         my $owner;
1868
1869         return undef unless $project;
1870         $git_dir = "$projectroot/$project";
1871
1872         if (!defined $gitweb_project_owner) {
1873                 git_get_project_list_from_file();
1874         }
1875
1876         if (exists $gitweb_project_owner->{$project}) {
1877                 $owner = $gitweb_project_owner->{$project};
1878         }
1879         if (!defined $owner){
1880                 $owner = git_get_project_config('owner');
1881         }
1882         if (!defined $owner) {
1883                 $owner = get_file_owner("$git_dir");
1884         }
1885
1886         return $owner;
1887 }
1888
1889 sub git_get_last_activity {
1890         my ($path) = @_;
1891         my $fd;
1892
1893         $git_dir = "$projectroot/$path";
1894         open($fd, "-|", git_cmd(), 'for-each-ref',
1895              '--format=%(committer)',
1896              '--sort=-committerdate',
1897              '--count=1',
1898              'refs/heads') or return;
1899         my $most_recent = <$fd>;
1900         close $fd or return;
1901         if (defined $most_recent &&
1902             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1903                 my $timestamp = $1;
1904                 my $age = time - $timestamp;
1905                 return ($age, age_string($age));
1906         }
1907         return (undef, undef);
1908 }
1909
1910 sub git_get_references {
1911         my $type = shift || "";
1912         my %refs;
1913         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1914         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1915         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1916                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1917                 or return;
1918
1919         while (my $line = <$fd>) {
1920                 chomp $line;
1921                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1922                         if (defined $refs{$1}) {
1923                                 push @{$refs{$1}}, $2;
1924                         } else {
1925                                 $refs{$1} = [ $2 ];
1926                         }
1927                 }
1928         }
1929         close $fd or return;
1930         return \%refs;
1931 }
1932
1933 sub git_get_rev_name_tags {
1934         my $hash = shift || return undef;
1935
1936         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1937                 or return;
1938         my $name_rev = <$fd>;
1939         close $fd;
1940
1941         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1942                 return $1;
1943         } else {
1944                 # catches also '$hash undefined' output
1945                 return undef;
1946         }
1947 }
1948
1949 ## ----------------------------------------------------------------------
1950 ## parse to hash functions
1951
1952 sub parse_date {
1953         my $epoch = shift;
1954         my $tz = shift || "-0000";
1955
1956         my %date;
1957         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1958         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1959         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1960         $date{'hour'} = $hour;
1961         $date{'minute'} = $min;
1962         $date{'mday'} = $mday;
1963         $date{'day'} = $days[$wday];
1964         $date{'month'} = $months[$mon];
1965         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1966                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1967         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1968                              $mday, $months[$mon], $hour ,$min;
1969         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1970                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1971
1972         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1973         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1974         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1975         $date{'hour_local'} = $hour;
1976         $date{'minute_local'} = $min;
1977         $date{'tz_local'} = $tz;
1978         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1979                                   1900+$year, $mon+1, $mday,
1980                                   $hour, $min, $sec, $tz);
1981         return %date;
1982 }
1983
1984 sub parse_tag {
1985         my $tag_id = shift;
1986         my %tag;
1987         my @comment;
1988
1989         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1990         $tag{'id'} = $tag_id;
1991         while (my $line = <$fd>) {
1992                 chomp $line;
1993                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1994                         $tag{'object'} = $1;
1995                 } elsif ($line =~ m/^type (.+)$/) {
1996                         $tag{'type'} = $1;
1997                 } elsif ($line =~ m/^tag (.+)$/) {
1998                         $tag{'name'} = $1;
1999                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2000                         $tag{'author'} = $1;
2001                         $tag{'epoch'} = $2;
2002                         $tag{'tz'} = $3;
2003                 } elsif ($line =~ m/--BEGIN/) {
2004                         push @comment, $line;
2005                         last;
2006                 } elsif ($line eq "") {
2007                         last;
2008                 }
2009         }
2010         push @comment, <$fd>;
2011         $tag{'comment'} = \@comment;
2012         close $fd or return;
2013         if (!defined $tag{'name'}) {
2014                 return
2015         };
2016         return %tag
2017 }
2018
2019 sub parse_commit_text {
2020         my ($commit_text, $withparents) = @_;
2021         my @commit_lines = split '\n', $commit_text;
2022         my %co;
2023
2024         pop @commit_lines; # Remove '\0'
2025
2026         if (! @commit_lines) {
2027                 return;
2028         }
2029
2030         my $header = shift @commit_lines;
2031         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2032                 return;
2033         }
2034         ($co{'id'}, my @parents) = split ' ', $header;
2035         while (my $line = shift @commit_lines) {
2036                 last if $line eq "\n";
2037                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2038                         $co{'tree'} = $1;
2039                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2040                         push @parents, $1;
2041                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2042                         $co{'author'} = $1;
2043                         $co{'author_epoch'} = $2;
2044                         $co{'author_tz'} = $3;
2045                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2046                                 $co{'author_name'}  = $1;
2047                                 $co{'author_email'} = $2;
2048                         } else {
2049                                 $co{'author_name'} = $co{'author'};
2050                         }
2051                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2052                         $co{'committer'} = $1;
2053                         $co{'committer_epoch'} = $2;
2054                         $co{'committer_tz'} = $3;
2055                         $co{'committer_name'} = $co{'committer'};
2056                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2057                                 $co{'committer_name'}  = $1;
2058                                 $co{'committer_email'} = $2;
2059                         } else {
2060                                 $co{'committer_name'} = $co{'committer'};
2061                         }
2062                 }
2063         }
2064         if (!defined $co{'tree'}) {
2065                 return;
2066         };
2067         $co{'parents'} = \@parents;
2068         $co{'parent'} = $parents[0];
2069
2070         foreach my $title (@commit_lines) {
2071                 $title =~ s/^    //;
2072                 if ($title ne "") {
2073                         $co{'title'} = chop_str($title, 80, 5);
2074                         # remove leading stuff of merges to make the interesting part visible
2075                         if (length($title) > 50) {
2076                                 $title =~ s/^Automatic //;
2077                                 $title =~ s/^merge (of|with) /Merge ... /i;
2078                                 if (length($title) > 50) {
2079                                         $title =~ s/(http|rsync):\/\///;
2080                                 }
2081                                 if (length($title) > 50) {
2082                                         $title =~ s/(master|www|rsync)\.//;
2083                                 }
2084                                 if (length($title) > 50) {
2085                                         $title =~ s/kernel.org:?//;
2086                                 }
2087                                 if (length($title) > 50) {
2088                                         $title =~ s/\/pub\/scm//;
2089                                 }
2090                         }
2091                         $co{'title_short'} = chop_str($title, 50, 5);
2092                         last;
2093                 }
2094         }
2095         if ($co{'title'} eq "") {
2096                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2097         }
2098         # remove added spaces
2099         foreach my $line (@commit_lines) {
2100                 $line =~ s/^    //;
2101         }
2102         $co{'comment'} = \@commit_lines;
2103
2104         my $age = time - $co{'committer_epoch'};
2105         $co{'age'} = $age;
2106         $co{'age_string'} = age_string($age);
2107         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2108         if ($age > 60*60*24*7*2) {
2109                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2110                 $co{'age_string_age'} = $co{'age_string'};
2111         } else {
2112                 $co{'age_string_date'} = $co{'age_string'};
2113                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2114         }
2115         return %co;
2116 }
2117
2118 sub parse_commit {
2119         my ($commit_id) = @_;
2120         my %co;
2121
2122         local $/ = "\0";
2123
2124         open my $fd, "-|", git_cmd(), "rev-list",
2125                 "--parents",
2126                 "--header",
2127                 "--max-count=1",
2128                 $commit_id,
2129                 "--",
2130                 or die_error(undef, "Open git-rev-list failed");
2131         %co = parse_commit_text(<$fd>, 1);
2132         close $fd;
2133
2134         return %co;
2135 }
2136
2137 sub parse_commits {
2138         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2139         my @cos;
2140
2141         $maxcount ||= 1;
2142         $skip ||= 0;
2143
2144         local $/ = "\0";
2145
2146         open my $fd, "-|", git_cmd(), "rev-list",
2147                 "--header",
2148                 @args,
2149                 ("--max-count=" . $maxcount),
2150                 ("--skip=" . $skip),
2151                 @extra_options,
2152                 $commit_id,
2153                 "--",
2154                 ($filename ? ($filename) : ())
2155                 or die_error(undef, "Open git-rev-list failed");
2156         while (my $line = <$fd>) {
2157                 my %co = parse_commit_text($line);
2158                 push @cos, \%co;
2159         }
2160         close $fd;
2161
2162         return wantarray ? @cos : \@cos;
2163 }
2164
2165 # parse line of git-diff-tree "raw" output
2166 sub parse_difftree_raw_line {
2167         my $line = shift;
2168         my %res;
2169
2170         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2171         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2172         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2173                 $res{'from_mode'} = $1;
2174                 $res{'to_mode'} = $2;
2175                 $res{'from_id'} = $3;
2176                 $res{'to_id'} = $4;
2177                 $res{'status'} = $5;
2178                 $res{'similarity'} = $6;
2179                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2180                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2181                 } else {
2182                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2183                 }
2184         }
2185         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2186         # combined diff (for merge commit)
2187         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2188                 $res{'nparents'}  = length($1);
2189                 $res{'from_mode'} = [ split(' ', $2) ];
2190                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2191                 $res{'from_id'} = [ split(' ', $3) ];
2192                 $res{'to_id'} = pop @{$res{'from_id'}};
2193                 $res{'status'} = [ split('', $4) ];
2194                 $res{'to_file'} = unquote($5);
2195         }
2196         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2197         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2198                 $res{'commit'} = $1;
2199         }
2200
2201         return wantarray ? %res : \%res;
2202 }
2203
2204 # wrapper: return parsed line of git-diff-tree "raw" output
2205 # (the argument might be raw line, or parsed info)
2206 sub parsed_difftree_line {
2207         my $line_or_ref = shift;
2208
2209         if (ref($line_or_ref) eq "HASH") {
2210                 # pre-parsed (or generated by hand)
2211                 return $line_or_ref;
2212         } else {
2213                 return parse_difftree_raw_line($line_or_ref);
2214         }
2215 }
2216
2217 # parse line of git-ls-tree output
2218 sub parse_ls_tree_line ($;%) {
2219         my $line = shift;
2220         my %opts = @_;
2221         my %res;
2222
2223         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2224         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2225
2226         $res{'mode'} = $1;
2227         $res{'type'} = $2;
2228         $res{'hash'} = $3;
2229         if ($opts{'-z'}) {
2230                 $res{'name'} = $4;
2231         } else {
2232                 $res{'name'} = unquote($4);
2233         }
2234
2235         return wantarray ? %res : \%res;
2236 }
2237
2238 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2239 sub parse_from_to_diffinfo {
2240         my ($diffinfo, $from, $to, @parents) = @_;
2241
2242         if ($diffinfo->{'nparents'}) {
2243                 # combined diff
2244                 $from->{'file'} = [];
2245                 $from->{'href'} = [];
2246                 fill_from_file_info($diffinfo, @parents)
2247                         unless exists $diffinfo->{'from_file'};
2248                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2249                         $from->{'file'}[$i] =
2250                                 defined $diffinfo->{'from_file'}[$i] ?
2251                                         $diffinfo->{'from_file'}[$i] :
2252                                         $diffinfo->{'to_file'};
2253                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2254                                 $from->{'href'}[$i] = href(action=>"blob",
2255                                                            hash_base=>$parents[$i],
2256                                                            hash=>$diffinfo->{'from_id'}[$i],
2257                                                            file_name=>$from->{'file'}[$i]);
2258                         } else {
2259                                 $from->{'href'}[$i] = undef;
2260                         }
2261                 }
2262         } else {
2263                 # ordinary (not combined) diff
2264                 $from->{'file'} = $diffinfo->{'from_file'};
2265                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2266                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2267                                                hash=>$diffinfo->{'from_id'},
2268                                                file_name=>$from->{'file'});
2269                 } else {
2270                         delete $from->{'href'};
2271                 }
2272         }
2273
2274         $to->{'file'} = $diffinfo->{'to_file'};
2275         if (!is_deleted($diffinfo)) { # file exists in result
2276                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2277                                      hash=>$diffinfo->{'to_id'},
2278                                      file_name=>$to->{'file'});
2279         } else {
2280                 delete $to->{'href'};
2281         }
2282 }
2283
2284 ## ......................................................................
2285 ## parse to array of hashes functions
2286
2287 sub git_get_heads_list {
2288         my $limit = shift;
2289         my @headslist;
2290
2291         open my $fd, '-|', git_cmd(), 'for-each-ref',
2292                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2293                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2294                 'refs/heads'
2295                 or return;
2296         while (my $line = <$fd>) {
2297                 my %ref_item;
2298
2299                 chomp $line;
2300                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2301                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2302                 my ($committer, $epoch, $tz) =
2303                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2304                 $ref_item{'fullname'}  = $name;
2305                 $name =~ s!^refs/heads/!!;
2306
2307                 $ref_item{'name'}  = $name;
2308                 $ref_item{'id'}    = $hash;
2309                 $ref_item{'title'} = $title || '(no commit message)';
2310                 $ref_item{'epoch'} = $epoch;
2311                 if ($epoch) {
2312                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2313                 } else {
2314                         $ref_item{'age'} = "unknown";
2315                 }
2316
2317                 push @headslist, \%ref_item;
2318         }
2319         close $fd;
2320
2321         return wantarray ? @headslist : \@headslist;
2322 }
2323
2324 sub git_get_tags_list {
2325         my $limit = shift;
2326         my @tagslist;
2327
2328         open my $fd, '-|', git_cmd(), 'for-each-ref',
2329                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2330                 '--format=%(objectname) %(objecttype) %(refname) '.
2331                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2332                 'refs/tags'
2333                 or return;
2334         while (my $line = <$fd>) {
2335                 my %ref_item;
2336
2337                 chomp $line;
2338                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2339                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2340                 my ($creator, $epoch, $tz) =
2341                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2342                 $ref_item{'fullname'} = $name;
2343                 $name =~ s!^refs/tags/!!;
2344
2345                 $ref_item{'type'} = $type;
2346                 $ref_item{'id'} = $id;
2347                 $ref_item{'name'} = $name;
2348                 if ($type eq "tag") {
2349                         $ref_item{'subject'} = $title;
2350                         $ref_item{'reftype'} = $reftype;
2351                         $ref_item{'refid'}   = $refid;
2352                 } else {
2353                         $ref_item{'reftype'} = $type;
2354                         $ref_item{'refid'}   = $id;
2355                 }
2356
2357                 if ($type eq "tag" || $type eq "commit") {
2358                         $ref_item{'epoch'} = $epoch;
2359                         if ($epoch) {
2360                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2361                         } else {
2362                                 $ref_item{'age'} = "unknown";
2363                         }
2364                 }
2365
2366                 push @tagslist, \%ref_item;
2367         }
2368         close $fd;
2369
2370         return wantarray ? @tagslist : \@tagslist;
2371 }
2372
2373 ## ----------------------------------------------------------------------
2374 ## filesystem-related functions
2375
2376 sub get_file_owner {
2377         my $path = shift;
2378
2379         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2380         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2381         if (!defined $gcos) {
2382                 return undef;
2383         }
2384         my $owner = $gcos;
2385         $owner =~ s/[,;].*$//;
2386         return to_utf8($owner);
2387 }
2388
2389 ## ......................................................................
2390 ## mimetype related functions
2391
2392 sub mimetype_guess_file {
2393         my $filename = shift;
2394         my $mimemap = shift;
2395         -r $mimemap or return undef;
2396
2397         my %mimemap;
2398         open(MIME, $mimemap) or return undef;
2399         while (<MIME>) {
2400                 next if m/^#/; # skip comments
2401                 my ($mime, $exts) = split(/\t+/);
2402                 if (defined $exts) {
2403                         my @exts = split(/\s+/, $exts);
2404                         foreach my $ext (@exts) {
2405                                 $mimemap{$ext} = $mime;
2406                         }
2407                 }
2408         }
2409         close(MIME);
2410
2411         $filename =~ /\.([^.]*)$/;
2412         return $mimemap{$1};
2413 }
2414
2415 sub mimetype_guess {
2416         my $filename = shift;
2417         my $mime;
2418         $filename =~ /\./ or return undef;
2419
2420         if ($mimetypes_file) {
2421                 my $file = $mimetypes_file;
2422                 if ($file !~ m!^/!) { # if it is relative path
2423                         # it is relative to project
2424                         $file = "$projectroot/$project/$file";
2425                 }
2426                 $mime = mimetype_guess_file($filename, $file);
2427         }
2428         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2429         return $mime;
2430 }
2431
2432 sub blob_mimetype {
2433         my $fd = shift;
2434         my $filename = shift;
2435
2436         if ($filename) {
2437                 my $mime = mimetype_guess($filename);
2438                 $mime and return $mime;
2439         }
2440
2441         # just in case
2442         return $default_blob_plain_mimetype unless $fd;
2443
2444         if (-T $fd) {
2445                 return 'text/plain';
2446         } elsif (! $filename) {
2447                 return 'application/octet-stream';
2448         } elsif ($filename =~ m/\.png$/i) {
2449                 return 'image/png';
2450         } elsif ($filename =~ m/\.gif$/i) {
2451                 return 'image/gif';
2452         } elsif ($filename =~ m/\.jpe?g$/i) {
2453                 return 'image/jpeg';
2454         } else {
2455                 return 'application/octet-stream';
2456         }
2457 }
2458
2459 sub blob_contenttype {
2460         my ($fd, $file_name, $type) = @_;
2461
2462         $type ||= blob_mimetype($fd, $file_name);
2463         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2464                 $type .= "; charset=$default_text_plain_charset";
2465         }
2466
2467         return $type;
2468 }
2469
2470 ## ======================================================================
2471 ## functions printing HTML: header, footer, error page
2472
2473 sub git_header_html {
2474         my $status = shift || "200 OK";
2475         my $expires = shift;
2476
2477         my $title = "$site_name";
2478         if (defined $project) {
2479                 $title .= " - " . to_utf8($project);
2480                 if (defined $action) {
2481                         $title .= "/$action";
2482                         if (defined $file_name) {
2483                                 $title .= " - " . esc_path($file_name);
2484                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2485                                         $title .= "/";
2486                                 }
2487                         }
2488                 }
2489         }
2490         my $content_type;
2491         # require explicit support from the UA if we are to send the page as
2492         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2493         # we have to do this because MSIE sometimes globs '*/*', pretending to
2494         # support xhtml+xml but choking when it gets what it asked for.
2495         if (defined $cgi->http('HTTP_ACCEPT') &&
2496             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2497             $cgi->Accept('application/xhtml+xml') != 0) {
2498                 $content_type = 'application/xhtml+xml';
2499         } else {
2500                 $content_type = 'text/html';
2501         }
2502         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2503                            -status=> $status, -expires => $expires);
2504         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2505         print <<EOF;
2506 <?xml version="1.0" encoding="utf-8"?>
2507 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2508 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2509 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2510 <!-- git core binaries version $git_version -->
2511 <head>
2512 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2513 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2514 <meta name="robots" content="index, nofollow"/>
2515 <title>$title</title>
2516 EOF
2517 # print out each stylesheet that exist
2518         if (defined $stylesheet) {
2519 #provides backwards capability for those people who define style sheet in a config file
2520                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2521         } else {
2522                 foreach my $stylesheet (@stylesheets) {
2523                         next unless $stylesheet;
2524                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2525                 }
2526         }
2527         if (defined $project) {
2528                 my %href_params = get_feed_info();
2529                 if (!exists $href_params{'-title'}) {
2530                         $href_params{'-title'} = 'log';
2531                 }
2532
2533                 foreach my $format qw(RSS Atom) {
2534                         my $type = lc($format);
2535                         my %link_attr = (
2536                                 '-rel' => 'alternate',
2537                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2538                                 '-type' => "application/$type+xml"
2539                         );
2540
2541                         $href_params{'action'} = $type;
2542                         $link_attr{'-href'} = href(%href_params);
2543                         print "<link ".
2544                               "rel=\"$link_attr{'-rel'}\" ".
2545                               "title=\"$link_attr{'-title'}\" ".
2546                               "href=\"$link_attr{'-href'}\" ".
2547                               "type=\"$link_attr{'-type'}\" ".
2548                               "/>\n";
2549
2550                         $href_params{'extra_options'} = '--no-merges';
2551                         $link_attr{'-href'} = href(%href_params);
2552                         $link_attr{'-title'} .= ' (no merges)';
2553                         print "<link ".
2554                               "rel=\"$link_attr{'-rel'}\" ".
2555                               "title=\"$link_attr{'-title'}\" ".
2556                               "href=\"$link_attr{'-href'}\" ".
2557                               "type=\"$link_attr{'-type'}\" ".
2558                               "/>\n";
2559                 }
2560
2561         } else {
2562                 printf('<link rel="alternate" title="%s projects list" '.
2563                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2564                        $site_name, href(project=>undef, action=>"project_index"));
2565                 printf('<link rel="alternate" title="%s projects feeds" '.
2566                        'href="%s" type="text/x-opml" />'."\n",
2567                        $site_name, href(project=>undef, action=>"opml"));
2568         }
2569         if (defined $favicon) {
2570                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2571         }
2572
2573         print "</head>\n" .
2574               "<body>\n";
2575
2576         if (-f $site_header) {
2577                 open (my $fd, $site_header);
2578                 print <$fd>;
2579                 close $fd;
2580         }
2581
2582         print "<div class=\"page_header\">\n" .
2583               $cgi->a({-href => esc_url($logo_url),
2584                        -title => $logo_label},
2585                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2586         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2587         if (defined $project) {
2588                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2589                 if (defined $action) {
2590                         print " / $action";
2591                 }
2592                 print "\n";
2593         }
2594         print "</div>\n";
2595
2596         my ($have_search) = gitweb_check_feature('search');
2597         if (defined $project && $have_search) {
2598                 if (!defined $searchtext) {
2599                         $searchtext = "";
2600                 }
2601                 my $search_hash;
2602                 if (defined $hash_base) {
2603                         $search_hash = $hash_base;
2604                 } elsif (defined $hash) {
2605                         $search_hash = $hash;
2606                 } else {
2607                         $search_hash = "HEAD";
2608                 }
2609                 my $action = $my_uri;
2610                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2611                 if ($use_pathinfo) {
2612                         $action .= "/".esc_url($project);
2613                 }
2614                 print $cgi->startform(-method => "get", -action => $action) .
2615                       "<div class=\"search\">\n" .
2616                       (!$use_pathinfo &&
2617                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2618                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2619                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2620                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2621                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2622                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2623                       " search:\n",
2624                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2625                       "<span title=\"Extended regular expression\">" .
2626                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2627                                      -checked => $search_use_regexp) .
2628                       "</span>" .
2629                       "</div>" .
2630                       $cgi->end_form() . "\n";
2631         }
2632 }
2633
2634 sub git_footer_html {
2635         my $feed_class = 'rss_logo';
2636
2637         print "<div class=\"page_footer\">\n";
2638         if (defined $project) {
2639                 my $descr = git_get_project_description($project);
2640                 if (defined $descr) {
2641                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2642                 }
2643
2644                 my %href_params = get_feed_info();
2645                 if (!%href_params) {
2646                         $feed_class .= ' generic';
2647                 }
2648                 $href_params{'-title'} ||= 'log';
2649
2650                 foreach my $format qw(RSS Atom) {
2651                         $href_params{'action'} = lc($format);
2652                         print $cgi->a({-href => href(%href_params),
2653                                       -title => "$href_params{'-title'} $format feed",
2654                                       -class => $feed_class}, $format)."\n";
2655                 }
2656
2657         } else {
2658                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2659                               -class => $feed_class}, "OPML") . " ";
2660                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2661                               -class => $feed_class}, "TXT") . "\n";
2662         }
2663         print "</div>\n"; # class="page_footer"
2664
2665         if (-f $site_footer) {
2666                 open (my $fd, $site_footer);
2667                 print <$fd>;
2668                 close $fd;
2669         }
2670
2671         print "</body>\n" .
2672               "</html>";
2673 }
2674
2675 sub die_error {
2676         my $status = shift || "403 Forbidden";
2677         my $error = shift || "Malformed query, file missing or permission denied";
2678
2679         git_header_html($status);
2680         print <<EOF;
2681 <div class="page_body">
2682 <br /><br />
2683 $status - $error
2684 <br />
2685 </div>
2686 EOF
2687         git_footer_html();
2688         exit;
2689 }
2690
2691 ## ----------------------------------------------------------------------
2692 ## functions printing or outputting HTML: navigation
2693
2694 sub git_print_page_nav {
2695         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2696         $extra = '' if !defined $extra; # pager or formats
2697
2698         my @navs = qw(summary shortlog log commit commitdiff tree);
2699         if ($suppress) {
2700                 @navs = grep { $_ ne $suppress } @navs;
2701         }
2702
2703         my %arg = map { $_ => {action=>$_} } @navs;
2704         if (defined $head) {
2705                 for (qw(commit commitdiff)) {
2706                         $arg{$_}{'hash'} = $head;
2707                 }
2708                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2709                         for (qw(shortlog log)) {
2710                                 $arg{$_}{'hash'} = $head;
2711                         }
2712                 }
2713         }
2714         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2715         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2716
2717         print "<div class=\"page_nav\">\n" .
2718                 (join " | ",
2719                  map { $_ eq $current ?
2720                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2721                  } @navs);
2722         print "<br/>\n$extra<br/>\n" .
2723               "</div>\n";
2724 }
2725
2726 sub format_paging_nav {
2727         my ($action, $hash, $head, $page, $has_next_link) = @_;
2728         my $paging_nav;
2729
2730
2731         if ($hash ne $head || $page) {
2732                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2733         } else {
2734                 $paging_nav .= "HEAD";
2735         }
2736
2737         if ($page > 0) {
2738                 $paging_nav .= " &sdot; " .
2739                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2740                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2741         } else {
2742                 $paging_nav .= " &sdot; prev";
2743         }
2744
2745         if ($has_next_link) {
2746                 $paging_nav .= " &sdot; " .
2747                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2748                                  -accesskey => "n", -title => "Alt-n"}, "next");
2749         } else {
2750                 $paging_nav .= " &sdot; next";
2751         }
2752
2753         return $paging_nav;
2754 }
2755
2756 ## ......................................................................
2757 ## functions printing or outputting HTML: div
2758
2759 sub git_print_header_div {
2760         my ($action, $title, $hash, $hash_base) = @_;
2761         my %args = ();
2762
2763         $args{'action'} = $action;
2764         $args{'hash'} = $hash if $hash;
2765         $args{'hash_base'} = $hash_base if $hash_base;
2766
2767         print "<div class=\"header\">\n" .
2768               $cgi->a({-href => href(%args), -class => "title"},
2769               $title ? $title : $action) .
2770               "\n</div>\n";
2771 }
2772
2773 #sub git_print_authorship (\%) {
2774 sub git_print_authorship {
2775         my $co = shift;
2776
2777         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2778         print "<div class=\"author_date\">" .
2779               esc_html($co->{'author_name'}) .
2780               " [$ad{'rfc2822'}";
2781         if ($ad{'hour_local'} < 6) {
2782                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2783                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2784         } else {
2785                 printf(" (%02d:%02d %s)",
2786                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2787         }
2788         print "]</div>\n";
2789 }
2790
2791 sub git_print_page_path {
2792         my $name = shift;
2793         my $type = shift;
2794         my $hb = shift;
2795
2796
2797         print "<div class=\"page_path\">";
2798         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2799                       -title => 'tree root'}, to_utf8("[$project]"));
2800         print " / ";
2801         if (defined $name) {
2802                 my @dirname = split '/', $name;
2803                 my $basename = pop @dirname;
2804                 my $fullname = '';
2805
2806                 foreach my $dir (@dirname) {
2807                         $fullname .= ($fullname ? '/' : '') . $dir;
2808                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2809                                                      hash_base=>$hb),
2810                                       -title => $fullname}, esc_path($dir));
2811                         print " / ";
2812                 }
2813                 if (defined $type && $type eq 'blob') {
2814                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2815                                                      hash_base=>$hb),
2816                                       -title => $name}, esc_path($basename));
2817                 } elsif (defined $type && $type eq 'tree') {
2818                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2819                                                      hash_base=>$hb),
2820                                       -title => $name}, esc_path($basename));
2821                         print " / ";
2822                 } else {
2823                         print esc_path($basename);
2824                 }
2825         }
2826         print "<br/></div>\n";
2827 }
2828
2829 # sub git_print_log (\@;%) {
2830 sub git_print_log ($;%) {
2831         my $log = shift;
2832         my %opts = @_;
2833
2834         if ($opts{'-remove_title'}) {
2835                 # remove title, i.e. first line of log
2836                 shift @$log;
2837         }
2838         # remove leading empty lines
2839         while (defined $log->[0] && $log->[0] eq "") {
2840                 shift @$log;
2841         }
2842
2843         # print log
2844         my $signoff = 0;
2845         my $empty = 0;
2846         foreach my $line (@$log) {
2847                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2848                         $signoff = 1;
2849                         $empty = 0;
2850                         if (! $opts{'-remove_signoff'}) {
2851                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2852                                 next;
2853                         } else {
2854                                 # remove signoff lines
2855                                 next;
2856                         }
2857                 } else {
2858                         $signoff = 0;
2859                 }
2860
2861                 # print only one empty line
2862                 # do not print empty line after signoff
2863                 if ($line eq "") {
2864                         next if ($empty || $signoff);
2865                         $empty = 1;
2866                 } else {
2867                         $empty = 0;
2868                 }
2869
2870                 print format_log_line_html($line) . "<br/>\n";
2871         }
2872
2873         if ($opts{'-final_empty_line'}) {
2874                 # end with single empty line
2875                 print "<br/>\n" unless $empty;
2876         }
2877 }
2878
2879 # return link target (what link points to)
2880 sub git_get_link_target {
2881         my $hash = shift;
2882         my $link_target;
2883
2884         # read link
2885         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2886                 or return;
2887         {
2888                 local $/;
2889                 $link_target = <$fd>;
2890         }
2891         close $fd
2892                 or return;
2893
2894         return $link_target;
2895 }
2896
2897 # given link target, and the directory (basedir) the link is in,
2898 # return target of link relative to top directory (top tree);
2899 # return undef if it is not possible (including absolute links).
2900 sub normalize_link_target {
2901         my ($link_target, $basedir, $hash_base) = @_;
2902
2903         # we can normalize symlink target only if $hash_base is provided
2904         return unless $hash_base;
2905
2906         # absolute symlinks (beginning with '/') cannot be normalized
2907         return if (substr($link_target, 0, 1) eq '/');
2908
2909         # normalize link target to path from top (root) tree (dir)
2910         my $path;
2911         if ($basedir) {
2912                 $path = $basedir . '/' . $link_target;
2913         } else {
2914                 # we are in top (root) tree (dir)
2915                 $path = $link_target;
2916         }
2917
2918         # remove //, /./, and /../
2919         my @path_parts;
2920         foreach my $part (split('/', $path)) {
2921                 # discard '.' and ''
2922                 next if (!$part || $part eq '.');
2923                 # handle '..'
2924                 if ($part eq '..') {
2925                         if (@path_parts) {
2926                                 pop @path_parts;
2927                         } else {
2928                                 # link leads outside repository (outside top dir)
2929                                 return;
2930                         }
2931                 } else {
2932                         push @path_parts, $part;
2933                 }
2934         }
2935         $path = join('/', @path_parts);
2936
2937         return $path;
2938 }
2939
2940 # print tree entry (row of git_tree), but without encompassing <tr> element
2941 sub git_print_tree_entry {
2942         my ($t, $basedir, $hash_base, $have_blame) = @_;
2943
2944         my %base_key = ();
2945         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2946
2947         # The format of a table row is: mode list link.  Where mode is
2948         # the mode of the entry, list is the name of the entry, an href,
2949         # and link is the action links of the entry.
2950
2951         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2952         if ($t->{'type'} eq "blob") {
2953                 print "<td class=\"list\">" .
2954                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2955                                                file_name=>"$basedir$t->{'name'}", %base_key),
2956                                 -class => "list"}, esc_path($t->{'name'}));
2957                 if (S_ISLNK(oct $t->{'mode'})) {
2958                         my $link_target = git_get_link_target($t->{'hash'});
2959                         if ($link_target) {
2960                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2961                                 if (defined $norm_target) {
2962                                         print " -> " .
2963                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2964                                                                      file_name=>$norm_target),
2965                                                        -title => $norm_target}, esc_path($link_target));
2966                                 } else {
2967                                         print " -> " . esc_path($link_target);
2968                                 }
2969                         }
2970                 }
2971                 print "</td>\n";
2972                 print "<td class=\"link\">";
2973                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2974                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2975                               "blob");
2976                 if ($have_blame) {
2977                         print " | " .
2978                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2979                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2980                                       "blame");
2981                 }
2982                 if (defined $hash_base) {
2983                         print " | " .
2984                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2985                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2986                                       "history");
2987                 }
2988                 print " | " .
2989                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2990                                                file_name=>"$basedir$t->{'name'}")},
2991                                 "raw");
2992                 print "</td>\n";
2993
2994         } elsif ($t->{'type'} eq "tree") {
2995                 print "<td class=\"list\">";
2996                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2997                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2998                               esc_path($t->{'name'}));
2999                 print "</td>\n";
3000                 print "<td class=\"link\">";
3001                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3002                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3003                               "tree");
3004                 if (defined $hash_base) {
3005                         print " | " .
3006                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3007                                                      file_name=>"$basedir$t->{'name'}")},
3008                                       "history");
3009                 }
3010                 print "</td>\n";
3011         } else {
3012                 # unknown object: we can only present history for it
3013                 # (this includes 'commit' object, i.e. submodule support)
3014                 print "<td class=\"list\">" .
3015                       esc_path($t->{'name'}) .
3016                       "</td>\n";
3017                 print "<td class=\"link\">";
3018                 if (defined $hash_base) {
3019                         print $cgi->a({-href => href(action=>"history",
3020                                                      hash_base=>$hash_base,
3021                                                      file_name=>"$basedir$t->{'name'}")},
3022                                       "history");
3023                 }
3024                 print "</td>\n";
3025         }
3026 }
3027
3028 ## ......................................................................
3029 ## functions printing large fragments of HTML
3030
3031 # get pre-image filenames for merge (combined) diff
3032 sub fill_from_file_info {
3033         my ($diff, @parents) = @_;
3034
3035         $diff->{'from_file'} = [ ];
3036         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3037         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3038                 if ($diff->{'status'}[$i] eq 'R' ||
3039                     $diff->{'status'}[$i] eq 'C') {
3040                         $diff->{'from_file'}[$i] =
3041                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3042                 }
3043         }
3044
3045         return $diff;
3046 }
3047
3048 # is current raw difftree line of file deletion
3049 sub is_deleted {
3050         my $diffinfo = shift;
3051
3052         return $diffinfo->{'to_id'} eq ('0' x 40);
3053 }
3054
3055 # does patch correspond to [previous] difftree raw line
3056 # $diffinfo  - hashref of parsed raw diff format
3057 # $patchinfo - hashref of parsed patch diff format
3058 #              (the same keys as in $diffinfo)
3059 sub is_patch_split {
3060         my ($diffinfo, $patchinfo) = @_;
3061
3062         return defined $diffinfo && defined $patchinfo
3063                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3064 }
3065
3066
3067 sub git_difftree_body {
3068         my ($difftree, $hash, @parents) = @_;
3069         my ($parent) = $parents[0];
3070         my ($have_blame) = gitweb_check_feature('blame');
3071         print "<div class=\"list_head\">\n";
3072         if ($#{$difftree} > 10) {
3073                 print(($#{$difftree} + 1) . " files changed:\n");
3074         }
3075         print "</div>\n";
3076
3077         print "<table class=\"" .
3078               (@parents > 1 ? "combined " : "") .
3079               "diff_tree\">\n";
3080
3081         # header only for combined diff in 'commitdiff' view
3082         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3083         if ($has_header) {
3084                 # table header
3085                 print "<thead><tr>\n" .
3086                        "<th></th><th></th>\n"; # filename, patchN link
3087                 for (my $i = 0; $i < @parents; $i++) {
3088                         my $par = $parents[$i];
3089                         print "<th>" .
3090                               $cgi->a({-href => href(action=>"commitdiff",
3091                                                      hash=>$hash, hash_parent=>$par),
3092                                        -title => 'commitdiff to parent number ' .
3093                                                   ($i+1) . ': ' . substr($par,0,7)},
3094                                       $i+1) .
3095                               "&nbsp;</th>\n";
3096                 }
3097                 print "</tr></thead>\n<tbody>\n";
3098         }
3099
3100         my $alternate = 1;
3101         my $patchno = 0;
3102         foreach my $line (@{$difftree}) {
3103                 my $diff = parsed_difftree_line($line);
3104
3105                 if ($alternate) {
3106                         print "<tr class=\"dark\">\n";
3107                 } else {
3108                         print "<tr class=\"light\">\n";
3109                 }
3110                 $alternate ^= 1;
3111
3112                 if (exists $diff->{'nparents'}) { # combined diff
3113
3114                         fill_from_file_info($diff, @parents)
3115                                 unless exists $diff->{'from_file'};
3116
3117                         if (!is_deleted($diff)) {
3118                                 # file exists in the result (child) commit
3119                                 print "<td>" .
3120                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3121                                                              file_name=>$diff->{'to_file'},
3122                                                              hash_base=>$hash),
3123                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3124                                       "</td>\n";
3125                         } else {
3126                                 print "<td>" .
3127                                       esc_path($diff->{'to_file'}) .
3128                                       "</td>\n";
3129                         }
3130
3131                         if ($action eq 'commitdiff') {
3132                                 # link to patch
3133                                 $patchno++;
3134                                 print "<td class=\"link\">" .
3135                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3136                                       " | " .
3137                                       "</td>\n";
3138                         }
3139
3140                         my $has_history = 0;
3141                         my $not_deleted = 0;
3142                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3143                                 my $hash_parent = $parents[$i];
3144                                 my $from_hash = $diff->{'from_id'}[$i];
3145                                 my $from_path = $diff->{'from_file'}[$i];
3146                                 my $status = $diff->{'status'}[$i];
3147
3148                                 $has_history ||= ($status ne 'A');
3149                                 $not_deleted ||= ($status ne 'D');
3150
3151                                 if ($status eq 'A') {
3152                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3153                                 } elsif ($status eq 'D') {
3154                                         print "<td class=\"link\">" .
3155                                               $cgi->a({-href => href(action=>"blob",
3156                                                                      hash_base=>$hash,
3157                                                                      hash=>$from_hash,
3158                                                                      file_name=>$from_path)},
3159                                                       "blob" . ($i+1)) .
3160                                               " | </td>\n";
3161                                 } else {
3162                                         if ($diff->{'to_id'} eq $from_hash) {
3163                                                 print "<td class=\"link nochange\">";
3164                                         } else {
3165                                                 print "<td class=\"link\">";
3166                                         }
3167                                         print $cgi->a({-href => href(action=>"blobdiff",
3168                                                                      hash=>$diff->{'to_id'},
3169                                                                      hash_parent=>$from_hash,
3170                                                                      hash_base=>$hash,
3171                                                                      hash_parent_base=>$hash_parent,
3172                                                                      file_name=>$diff->{'to_file'},
3173                                                                      file_parent=>$from_path)},
3174                                                       "diff" . ($i+1)) .
3175                                               " | </td>\n";
3176                                 }
3177                         }
3178
3179                         print "<td class=\"link\">";
3180                         if ($not_deleted) {
3181                                 print $cgi->a({-href => href(action=>"blob",
3182                                                              hash=>$diff->{'to_id'},
3183                                                              file_name=>$diff->{'to_file'},
3184                                                              hash_base=>$hash)},
3185                                               "blob");
3186                                 print " | " if ($has_history);
3187                         }
3188                         if ($has_history) {
3189                                 print $cgi->a({-href => href(action=>"history",
3190                                                              file_name=>$diff->{'to_file'},
3191                                                              hash_base=>$hash)},
3192                                               "history");
3193                         }
3194                         print "</td>\n";
3195
3196                         print "</tr>\n";
3197                         next; # instead of 'else' clause, to avoid extra indent
3198                 }
3199                 # else ordinary diff
3200
3201                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3202                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3203                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3204                         $to_mode_oct = oct $diff->{'to_mode'};
3205                         if (S_ISREG($to_mode_oct)) { # only for regular file
3206                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3207                         }
3208                         $to_file_type = file_type($diff->{'to_mode'});
3209                 }
3210                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3211                         $from_mode_oct = oct $diff->{'from_mode'};
3212                         if (S_ISREG($to_mode_oct)) { # only for regular file
3213                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3214                         }
3215                         $from_file_type = file_type($diff->{'from_mode'});
3216                 }
3217
3218                 if ($diff->{'status'} eq "A") { # created
3219                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3220                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3221                         $mode_chng   .= "]</span>";
3222                         print "<td>";
3223                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3224                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3225                                       -class => "list"}, esc_path($diff->{'file'}));
3226                         print "</td>\n";
3227                         print "<td>$mode_chng</td>\n";
3228                         print "<td class=\"link\">";
3229                         if ($action eq 'commitdiff') {
3230                                 # link to patch
3231                                 $patchno++;
3232                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3233                                 print " | ";
3234                         }
3235                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3236                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3237                                       "blob");
3238                         print "</td>\n";
3239
3240                 } elsif ($diff->{'status'} eq "D") { # deleted
3241                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3242                         print "<td>";
3243                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3244                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3245                                        -class => "list"}, esc_path($diff->{'file'}));
3246                         print "</td>\n";
3247                         print "<td>$mode_chng</td>\n";
3248                         print "<td class=\"link\">";
3249                         if ($action eq 'commitdiff') {
3250                                 # link to patch
3251                                 $patchno++;
3252                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3253                                 print " | ";
3254                         }
3255                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3256                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3257                                       "blob") . " | ";
3258                         if ($have_blame) {
3259                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3260                                                              file_name=>$diff->{'file'})},
3261                                               "blame") . " | ";
3262                         }
3263                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3264                                                      file_name=>$diff->{'file'})},
3265                                       "history");
3266                         print "</td>\n";
3267
3268                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3269                         my $mode_chnge = "";
3270                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3271                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3272                                 if ($from_file_type ne $to_file_type) {
3273                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3274                                 }
3275                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3276                                         if ($from_mode_str && $to_mode_str) {
3277                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3278                                         } elsif ($to_mode_str) {
3279                                                 $mode_chnge .= " mode: $to_mode_str";
3280                                         }
3281                                 }
3282                                 $mode_chnge .= "]</span>\n";
3283                         }
3284                         print "<td>";
3285                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3286                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3287                                       -class => "list"}, esc_path($diff->{'file'}));
3288                         print "</td>\n";
3289                         print "<td>$mode_chnge</td>\n";
3290                         print "<td class=\"link\">";
3291                         if ($action eq 'commitdiff') {
3292                                 # link to patch
3293                                 $patchno++;
3294                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3295                                       " | ";
3296                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3297                                 # "commit" view and modified file (not onlu mode changed)
3298                                 print $cgi->a({-href => href(action=>"blobdiff",
3299                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3300                                                              hash_base=>$hash, hash_parent_base=>$parent,
3301                                                              file_name=>$diff->{'file'})},
3302                                               "diff") .
3303                                       " | ";
3304                         }
3305                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3306                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3307                                        "blob") . " | ";
3308                         if ($have_blame) {
3309                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3310                                                              file_name=>$diff->{'file'})},
3311                                               "blame") . " | ";
3312                         }
3313                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3314                                                      file_name=>$diff->{'file'})},
3315                                       "history");
3316                         print "</td>\n";
3317
3318                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3319                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3320                         my $nstatus = $status_name{$diff->{'status'}};
3321                         my $mode_chng = "";
3322                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3323                                 # mode also for directories, so we cannot use $to_mode_str
3324                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3325                         }
3326                         print "<td>" .
3327                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3328                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3329                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3330                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3331                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3332                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3333                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3334                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3335                               "<td class=\"link\">";
3336                         if ($action eq 'commitdiff') {
3337                                 # link to patch
3338                                 $patchno++;
3339                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3340                                       " | ";
3341                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3342                                 # "commit" view and modified file (not only pure rename or copy)
3343                                 print $cgi->a({-href => href(action=>"blobdiff",
3344                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3345                                                              hash_base=>$hash, hash_parent_base=>$parent,
3346                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3347                                               "diff") .
3348                                       " | ";
3349                         }
3350                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3351                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3352                                       "blob") . " | ";
3353                         if ($have_blame) {
3354                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3355                                                              file_name=>$diff->{'to_file'})},
3356                                               "blame") . " | ";
3357                         }
3358                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3359                                                     file_name=>$diff->{'to_file'})},
3360                                       "history");
3361                         print "</td>\n";
3362
3363                 } # we should not encounter Unmerged (U) or Unknown (X) status
3364                 print "</tr>\n";
3365         }
3366         print "</tbody>" if $has_header;
3367         print "</table>\n";
3368 }
3369
3370 sub git_patchset_body {
3371         my ($fd, $difftree, $hash, @hash_parents) = @_;
3372         my ($hash_parent) = $hash_parents[0];
3373
3374         my $is_combined = (@hash_parents > 1);
3375         my $patch_idx = 0;
3376         my $patch_number = 0;
3377         my $patch_line;
3378         my $diffinfo;
3379         my $to_name;
3380         my (%from, %to);
3381
3382         print "<div class=\"patchset\">\n";
3383
3384         # skip to first patch
3385         while ($patch_line = <$fd>) {
3386                 chomp $patch_line;
3387
3388                 last if ($patch_line =~ m/^diff /);
3389         }
3390
3391  PATCH:
3392         while ($patch_line) {
3393
3394                 # parse "git diff" header line
3395                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3396                         # $1 is from_name, which we do not use
3397                         $to_name = unquote($2);
3398                         $to_name =~ s!^b/!!;
3399                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3400                         # $1 is 'cc' or 'combined', which we do not use
3401                         $to_name = unquote($2);
3402                 } else {
3403                         $to_name = undef;
3404                 }
3405
3406                 # check if current patch belong to current raw line
3407                 # and parse raw git-diff line if needed
3408                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3409                         # this is continuation of a split patch
3410                         print "<div class=\"patch cont\">\n";
3411                 } else {
3412                         # advance raw git-diff output if needed
3413                         $patch_idx++ if defined $diffinfo;
3414
3415                         # read and prepare patch information
3416                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3417
3418                         # compact combined diff output can have some patches skipped
3419                         # find which patch (using pathname of result) we are at now;
3420                         if ($is_combined) {
3421                                 while ($to_name ne $diffinfo->{'to_file'}) {
3422                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3423                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3424                                               "</div>\n";  # class="patch"
3425
3426                                         $patch_idx++;
3427                                         $patch_number++;
3428
3429                                         last if $patch_idx > $#$difftree;
3430                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3431                                 }
3432                         }
3433
3434                         # modifies %from, %to hashes
3435                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3436
3437                         # this is first patch for raw difftree line with $patch_idx index
3438                         # we index @$difftree array from 0, but number patches from 1
3439                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3440                 }
3441
3442                 # git diff header
3443                 #assert($patch_line =~ m/^diff /) if DEBUG;
3444                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3445                 $patch_number++;
3446                 # print "git diff" header
3447                 print format_git_diff_header_line($patch_line, $diffinfo,
3448                                                   \%from, \%to);
3449
3450                 # print extended diff header
3451                 print "<div class=\"diff extended_header\">\n";
3452         EXTENDED_HEADER:
3453                 while ($patch_line = <$fd>) {
3454                         chomp $patch_line;
3455
3456                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3457
3458                         print format_extended_diff_header_line($patch_line, $diffinfo,
3459                                                                \%from, \%to);
3460                 }
3461                 print "</div>\n"; # class="diff extended_header"
3462
3463                 # from-file/to-file diff header
3464                 if (! $patch_line) {
3465                         print "</div>\n"; # class="patch"
3466                         last PATCH;
3467                 }
3468                 next PATCH if ($patch_line =~ m/^diff /);
3469                 #assert($patch_line =~ m/^---/) if DEBUG;
3470
3471                 my $last_patch_line = $patch_line;
3472                 $patch_line = <$fd>;
3473                 chomp $patch_line;
3474                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3475
3476                 print format_diff_from_to_header($last_patch_line, $patch_line,
3477                                                  $diffinfo, \%from, \%to,
3478                                                  @hash_parents);
3479
3480                 # the patch itself
3481         LINE:
3482                 while ($patch_line = <$fd>) {
3483                         chomp $patch_line;
3484
3485                         next PATCH if ($patch_line =~ m/^diff /);
3486
3487                         print format_diff_line($patch_line, \%from, \%to);
3488                 }
3489
3490         } continue {
3491                 print "</div>\n"; # class="patch"
3492         }
3493
3494         # for compact combined (--cc) format, with chunk and patch simpliciaction
3495         # patchset might be empty, but there might be unprocessed raw lines
3496         for (++$patch_idx if $patch_number > 0;
3497              $patch_idx < @$difftree;
3498              ++$patch_idx) {
3499                 # read and prepare patch information
3500                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3501
3502                 # generate anchor for "patch" links in difftree / whatchanged part
3503                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3504                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3505                       "</div>\n";  # class="patch"
3506
3507                 $patch_number++;
3508         }
3509
3510         if ($patch_number == 0) {
3511                 if (@hash_parents > 1) {
3512                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3513                 } else {
3514                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3515                 }
3516         }
3517
3518         print "</div>\n"; # class="patchset"
3519 }
3520
3521 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3522
3523 # fills project list info (age, description, owner, forks) for each
3524 # project in the list, removing invalid projects from returned list
3525 # NOTE: modifies $projlist, but does not remove entries from it
3526 sub fill_project_list_info {
3527         my ($projlist, $check_forks) = @_;
3528         my @projects;
3529
3530  PROJECT:
3531         foreach my $pr (@$projlist) {
3532                 my (@activity) = git_get_last_activity($pr->{'path'});
3533                 unless (@activity) {
3534                         next PROJECT;
3535                 }
3536                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3537                 if (!defined $pr->{'descr'}) {
3538                         my $descr = git_get_project_description($pr->{'path'}) || "";
3539                         $descr = to_utf8($descr);
3540                         $pr->{'descr_long'} = $descr;
3541                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3542                 }
3543                 if (!defined $pr->{'owner'}) {
3544                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3545                 }
3546                 if ($check_forks) {
3547                         my $pname = $pr->{'path'};
3548                         if (($pname =~ s/\.git$//) &&
3549                             ($pname !~ /\/$/) &&
3550                             (-d "$projectroot/$pname")) {
3551                                 $pr->{'forks'} = "-d $projectroot/$pname";
3552                         }       else {
3553                                 $pr->{'forks'} = 0;
3554                         }
3555                 }
3556                 push @projects, $pr;
3557         }
3558
3559         return @projects;
3560 }
3561
3562 # print 'sort by' <th> element, either sorting by $key if $name eq $order
3563 # (changing $list), or generating 'sort by $name' replay link otherwise
3564 sub print_sort_th {
3565         my ($str_sort, $name, $order, $key, $header, $list) = @_;
3566         $key    ||= $name;
3567         $header ||= ucfirst($name);
3568
3569         if ($order eq $name) {
3570                 if ($str_sort) {
3571                         @$list = sort {$a->{$key} cmp $b->{$key}} @$list;
3572                 } else {
3573                         @$list = sort {$a->{$key} <=> $b->{$key}} @$list;
3574                 }
3575                 print "<th>$header</th>\n";
3576         } else {
3577                 print "<th>" .
3578                       $cgi->a({-href => href(-replay=>1, order=>$name),
3579                                -class => "header"}, $header) .
3580                       "</th>\n";
3581         }
3582 }
3583
3584 sub print_sort_th_str {
3585         print_sort_th(1, @_);
3586 }
3587
3588 sub print_sort_th_num {
3589         print_sort_th(0, @_);
3590 }
3591
3592 sub git_project_list_body {
3593         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3594
3595         my ($check_forks) = gitweb_check_feature('forks');
3596         my @projects = fill_project_list_info($projlist, $check_forks);
3597
3598         $order ||= $default_projects_order;
3599         $from = 0 unless defined $from;
3600         $to = $#projects if (!defined $to || $#projects < $to);
3601
3602         print "<table class=\"project_list\">\n";
3603         unless ($no_header) {
3604                 print "<tr>\n";
3605                 if ($check_forks) {
3606                         print "<th></th>\n";
3607                 }
3608                 print_sort_th_str('project', $order, 'path',
3609                                   'Project', \@projects);
3610                 print_sort_th_str('descr', $order, 'descr_long',
3611                                   'Description', \@projects);
3612                 print_sort_th_str('owner', $order, 'owner',
3613                                   'Owner', \@projects);
3614                 print_sort_th_num('age', $order, 'age',
3615                                   'Last Change', \@projects);
3616                 print "<th></th>\n" . # for links
3617                       "</tr>\n";
3618         }
3619         my $alternate = 1;
3620         for (my $i = $from; $i <= $to; $i++) {
3621                 my $pr = $projects[$i];
3622                 if ($alternate) {
3623                         print "<tr class=\"dark\">\n";
3624                 } else {
3625                         print "<tr class=\"light\">\n";
3626                 }
3627                 $alternate ^= 1;
3628                 if ($check_forks) {
3629                         print "<td>";
3630                         if ($pr->{'forks'}) {
3631                                 print "<!-- $pr->{'forks'} -->\n";
3632                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3633                         }
3634                         print "</td>\n";
3635                 }
3636                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3637                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3638                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3639                                         -class => "list", -title => $pr->{'descr_long'}},
3640                                         esc_html($pr->{'descr'})) . "</td>\n" .
3641                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3642                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3643                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3644                       "<td class=\"link\">" .
3645                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3646                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3647                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3648                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3649                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3650                       "</td>\n" .
3651                       "</tr>\n";
3652         }
3653         if (defined $extra) {
3654                 print "<tr>\n";
3655                 if ($check_forks) {
3656                         print "<td></td>\n";
3657                 }
3658                 print "<td colspan=\"5\">$extra</td>\n" .
3659                       "</tr>\n";
3660         }
3661         print "</table>\n";
3662 }
3663
3664 sub git_shortlog_body {
3665         # uses global variable $project
3666         my ($commitlist, $from, $to, $refs, $extra) = @_;
3667
3668         $from = 0 unless defined $from;
3669         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3670
3671         print "<table class=\"shortlog\">\n";
3672         my $alternate = 1;
3673         for (my $i = $from; $i <= $to; $i++) {
3674                 my %co = %{$commitlist->[$i]};
3675                 my $commit = $co{'id'};
3676                 my $ref = format_ref_marker($refs, $commit);
3677                 if ($alternate) {
3678                         print "<tr class=\"dark\">\n";
3679                 } else {
3680                         print "<tr class=\"light\">\n";
3681                 }
3682                 $alternate ^= 1;
3683                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3684                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3685                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3686                       "<td><i>" . $author . "</i></td>\n" .
3687                       "<td>";
3688                 print format_subject_html($co{'title'}, $co{'title_short'},
3689                                           href(action=>"commit", hash=>$commit), $ref);
3690                 print "</td>\n" .
3691                       "<td class=\"link\">" .
3692                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3693                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3694                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3695                 my $snapshot_links = format_snapshot_links($commit);
3696                 if (defined $snapshot_links) {
3697                         print " | " . $snapshot_links;
3698                 }
3699                 print "</td>\n" .
3700                       "</tr>\n";
3701         }
3702         if (defined $extra) {
3703                 print "<tr>\n" .
3704                       "<td colspan=\"4\">$extra</td>\n" .
3705                       "</tr>\n";
3706         }
3707         print "</table>\n";
3708 }
3709
3710 sub git_history_body {
3711         # Warning: assumes constant type (blob or tree) during history
3712         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3713
3714         $from = 0 unless defined $from;
3715         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3716
3717         print "<table class=\"history\">\n";
3718         my $alternate = 1;
3719         for (my $i = $from; $i <= $to; $i++) {
3720                 my %co = %{$commitlist->[$i]};
3721                 if (!%co) {
3722                         next;
3723                 }
3724                 my $commit = $co{'id'};
3725
3726                 my $ref = format_ref_marker($refs, $commit);
3727
3728                 if ($alternate) {
3729                         print "<tr class=\"dark\">\n";
3730                 } else {
3731                         print "<tr class=\"light\">\n";
3732                 }
3733                 $alternate ^= 1;
3734         # shortlog uses      chop_str($co{'author_name'}, 10)
3735                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3736                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3737                       "<td><i>" . $author . "</i></td>\n" .
3738                       "<td>";
3739                 # originally git_history used chop_str($co{'title'}, 50)
3740                 print format_subject_html($co{'title'}, $co{'title_short'},
3741                                           href(action=>"commit", hash=>$commit), $ref);
3742                 print "</td>\n" .
3743                       "<td class=\"link\">" .
3744                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3745                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3746
3747                 if ($ftype eq 'blob') {
3748                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3749                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3750                         if (defined $blob_current && defined $blob_parent &&
3751                                         $blob_current ne $blob_parent) {
3752                                 print " | " .
3753                                         $cgi->a({-href => href(action=>"blobdiff",
3754                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3755                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3756                                                                file_name=>$file_name)},
3757                                                 "diff to current");
3758                         }
3759                 }
3760                 print "</td>\n" .
3761                       "</tr>\n";
3762         }
3763         if (defined $extra) {
3764                 print "<tr>\n" .
3765                       "<td colspan=\"4\">$extra</td>\n" .
3766                       "</tr>\n";
3767         }
3768         print "</table>\n";
3769 }
3770
3771 sub git_tags_body {
3772         # uses global variable $project
3773         my ($taglist, $from, $to, $extra) = @_;
3774         $from = 0 unless defined $from;
3775         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3776
3777         print "<table class=\"tags\">\n";
3778         my $alternate = 1;
3779         for (my $i = $from; $i <= $to; $i++) {
3780                 my $entry = $taglist->[$i];
3781                 my %tag = %$entry;
3782                 my $comment = $tag{'subject'};
3783                 my $comment_short;
3784                 if (defined $comment) {
3785                         $comment_short = chop_str($comment, 30, 5);
3786                 }
3787                 if ($alternate) {
3788                         print "<tr class=\"dark\">\n";
3789                 } else {
3790                         print "<tr class=\"light\">\n";
3791                 }
3792                 $alternate ^= 1;
3793                 if (defined $tag{'age'}) {
3794                         print "<td><i>$tag{'age'}</i></td>\n";
3795                 } else {
3796                         print "<td></td>\n";
3797                 }
3798                 print "<td>" .
3799                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3800                                -class => "list name"}, esc_html($tag{'name'})) .
3801                       "</td>\n" .
3802                       "<td>";
3803                 if (defined $comment) {
3804                         print format_subject_html($comment, $comment_short,
3805                                                   href(action=>"tag", hash=>$tag{'id'}));
3806                 }
3807                 print "</td>\n" .
3808                       "<td class=\"selflink\">";
3809                 if ($tag{'type'} eq "tag") {
3810                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3811                 } else {
3812                         print "&nbsp;";
3813                 }
3814                 print "</td>\n" .
3815                       "<td class=\"link\">" . " | " .
3816                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3817                 if ($tag{'reftype'} eq "commit") {
3818                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3819                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3820                 } elsif ($tag{'reftype'} eq "blob") {
3821                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3822                 }
3823                 print "</td>\n" .
3824                       "</tr>";
3825         }
3826         if (defined $extra) {
3827                 print "<tr>\n" .
3828                       "<td colspan=\"5\">$extra</td>\n" .
3829                       "</tr>\n";
3830         }
3831         print "</table>\n";
3832 }
3833
3834 sub git_heads_body {
3835         # uses global variable $project
3836         my ($headlist, $head, $from, $to, $extra) = @_;
3837         $from = 0 unless defined $from;
3838         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3839
3840         print "<table class=\"heads\">\n";
3841         my $alternate = 1;
3842         for (my $i = $from; $i <= $to; $i++) {
3843                 my $entry = $headlist->[$i];
3844                 my %ref = %$entry;
3845                 my $curr = $ref{'id'} eq $head;
3846                 if ($alternate) {
3847                         print "<tr class=\"dark\">\n";
3848                 } else {
3849                         print "<tr class=\"light\">\n";
3850                 }
3851                 $alternate ^= 1;
3852                 print "<td><i>$ref{'age'}</i></td>\n" .
3853                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3854                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3855                                -class => "list name"},esc_html($ref{'name'})) .
3856                       "</td>\n" .
3857                       "<td class=\"link\">" .
3858                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3859                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3860                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3861                       "</td>\n" .
3862                       "</tr>";
3863         }
3864         if (defined $extra) {
3865                 print "<tr>\n" .
3866                       "<td colspan=\"3\">$extra</td>\n" .
3867                       "</tr>\n";
3868         }
3869         print "</table>\n";
3870 }
3871
3872 sub git_search_grep_body {
3873         my ($commitlist, $from, $to, $extra) = @_;
3874         $from = 0 unless defined $from;
3875         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3876
3877         print "<table class=\"commit_search\">\n";
3878         my $alternate = 1;
3879         for (my $i = $from; $i <= $to; $i++) {
3880                 my %co = %{$commitlist->[$i]};
3881                 if (!%co) {
3882                         next;
3883                 }
3884                 my $commit = $co{'id'};
3885                 if ($alternate) {
3886                         print "<tr class=\"dark\">\n";
3887                 } else {
3888                         print "<tr class=\"light\">\n";
3889                 }
3890                 $alternate ^= 1;
3891                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3892                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3893                       "<td><i>" . $author . "</i></td>\n" .
3894                       "<td>" .
3895                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3896                                -class => "list subject"},
3897                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3898                 my $comment = $co{'comment'};
3899                 foreach my $line (@$comment) {
3900                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3901                                 my ($lead, $match, $trail) = ($1, $2, $3);
3902                                 $match = chop_str($match, 70, 5, 'center');
3903                                 my $contextlen = int((80 - length($match))/2);
3904                                 $contextlen = 30 if ($contextlen > 30);
3905                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3906                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3907
3908                                 $lead  = esc_html($lead);
3909                                 $match = esc_html($match);
3910                                 $trail = esc_html($trail);
3911
3912                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3913                         }
3914                 }
3915                 print "</td>\n" .
3916                       "<td class=\"link\">" .
3917                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3918                       " | " .
3919                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3920                       " | " .
3921                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3922                 print "</td>\n" .
3923                       "</tr>\n";
3924         }
3925         if (defined $extra) {
3926                 print "<tr>\n" .
3927                       "<td colspan=\"3\">$extra</td>\n" .
3928                       "</tr>\n";
3929         }
3930         print "</table>\n";
3931 }
3932
3933 ## ======================================================================
3934 ## ======================================================================
3935 ## actions
3936
3937 sub git_project_list {
3938         my $order = $cgi->param('o');
3939         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3940                 die_error(undef, "Unknown order parameter");
3941         }
3942
3943         my @list = git_get_projects_list();
3944         if (!@list) {
3945                 die_error(undef, "No projects found");
3946         }
3947
3948         git_header_html();
3949         if (-f $home_text) {
3950                 print "<div class=\"index_include\">\n";
3951                 open (my $fd, $home_text);
3952                 print <$fd>;
3953                 close $fd;
3954                 print "</div>\n";
3955         }
3956         git_project_list_body(\@list, $order);
3957         git_footer_html();
3958 }
3959
3960 sub git_forks {
3961         my $order = $cgi->param('o');
3962         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3963                 die_error(undef, "Unknown order parameter");
3964         }
3965
3966         my @list = git_get_projects_list($project);
3967         if (!@list) {
3968                 die_error(undef, "No forks found");
3969         }
3970
3971         git_header_html();
3972         git_print_page_nav('','');
3973         git_print_header_div('summary', "$project forks");
3974         git_project_list_body(\@list, $order);
3975         git_footer_html();
3976 }
3977
3978 sub git_project_index {
3979         my @projects = git_get_projects_list($project);
3980
3981         print $cgi->header(
3982                 -type => 'text/plain',
3983                 -charset => 'utf-8',
3984                 -content_disposition => 'inline; filename="index.aux"');
3985
3986         foreach my $pr (@projects) {
3987                 if (!exists $pr->{'owner'}) {
3988                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3989                 }
3990
3991                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3992                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3993                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3994                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3995                 $path  =~ s/ /\+/g;
3996                 $owner =~ s/ /\+/g;
3997
3998                 print "$path $owner\n";
3999         }
4000 }
4001
4002 sub git_summary {
4003         my $descr = git_get_project_description($project) || "none";
4004         my %co = parse_commit("HEAD");
4005         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4006         my $head = $co{'id'};
4007
4008         my $owner = git_get_project_owner($project);
4009
4010         my $refs = git_get_references();
4011         # These get_*_list functions return one more to allow us to see if
4012         # there are more ...
4013         my @taglist  = git_get_tags_list(16);
4014         my @headlist = git_get_heads_list(16);
4015         my @forklist;
4016         my ($check_forks) = gitweb_check_feature('forks');
4017
4018         if ($check_forks) {
4019                 @forklist = git_get_projects_list($project);
4020         }
4021
4022         git_header_html();
4023         git_print_page_nav('summary','', $head);
4024
4025         print "<div class=\"title\">&nbsp;</div>\n";
4026         print "<table class=\"projects_list\">\n" .
4027               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4028               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4029         if (defined $cd{'rfc2822'}) {
4030                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4031         }
4032
4033         # use per project git URL list in $projectroot/$project/cloneurl
4034         # or make project git URL from git base URL and project name
4035         my $url_tag = "URL";
4036         my @url_list = git_get_project_url_list($project);
4037         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4038         foreach my $git_url (@url_list) {
4039                 next unless $git_url;
4040                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4041                 $url_tag = "";
4042         }
4043         print "</table>\n";
4044
4045         if (-s "$projectroot/$project/README.html") {
4046                 if (open my $fd, "$projectroot/$project/README.html") {
4047                         print "<div class=\"title\">readme</div>\n" .
4048                               "<div class=\"readme\">\n";
4049                         print $_ while (<$fd>);
4050                         print "\n</div>\n"; # class="readme"
4051                         close $fd;
4052                 }
4053         }
4054
4055         # we need to request one more than 16 (0..15) to check if
4056         # those 16 are all
4057         my @commitlist = $head ? parse_commits($head, 17) : ();
4058         if (@commitlist) {
4059                 git_print_header_div('shortlog');
4060                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4061                                   $#commitlist <=  15 ? undef :
4062                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4063         }
4064
4065         if (@taglist) {
4066                 git_print_header_div('tags');
4067                 git_tags_body(\@taglist, 0, 15,
4068                               $#taglist <=  15 ? undef :
4069                               $cgi->a({-href => href(action=>"tags")}, "..."));
4070         }
4071
4072         if (@headlist) {
4073                 git_print_header_div('heads');
4074                 git_heads_body(\@headlist, $head, 0, 15,
4075                                $#headlist <= 15 ? undef :
4076                                $cgi->a({-href => href(action=>"heads")}, "..."));
4077         }
4078
4079         if (@forklist) {
4080                 git_print_header_div('forks');
4081                 git_project_list_body(\@forklist, undef, 0, 15,
4082                                       $#forklist <= 15 ? undef :
4083                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4084                                       'noheader');
4085         }
4086
4087         git_footer_html();
4088 }
4089
4090 sub git_tag {
4091         my $head = git_get_head_hash($project);
4092         git_header_html();
4093         git_print_page_nav('','', $head,undef,$head);
4094         my %tag = parse_tag($hash);
4095
4096         if (! %tag) {
4097                 die_error(undef, "Unknown tag object");
4098         }
4099
4100         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4101         print "<div class=\"title_text\">\n" .
4102               "<table class=\"object_header\">\n" .
4103               "<tr>\n" .
4104               "<td>object</td>\n" .
4105               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4106                                $tag{'object'}) . "</td>\n" .
4107               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4108                                               $tag{'type'}) . "</td>\n" .
4109               "</tr>\n";
4110         if (defined($tag{'author'})) {
4111                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4112                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4113                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4114                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4115                         "</td></tr>\n";
4116         }
4117         print "</table>\n\n" .
4118               "</div>\n";
4119         print "<div class=\"page_body\">";
4120         my $comment = $tag{'comment'};
4121         foreach my $line (@$comment) {
4122                 chomp $line;
4123                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4124         }
4125         print "</div>\n";
4126         git_footer_html();
4127 }
4128
4129 sub git_blame {
4130         my $fd;
4131         my $ftype;
4132
4133         my ($have_blame) = gitweb_check_feature('blame');
4134         if (!$have_blame) {
4135                 die_error('403 Permission denied', "Permission denied");
4136         }
4137         die_error('404 Not Found', "File name not defined") if (!$file_name);
4138         $hash_base ||= git_get_head_hash($project);
4139         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4140         my %co = parse_commit($hash_base)
4141                 or die_error(undef, "Reading commit failed");
4142         if (!defined $hash) {
4143                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4144                         or die_error(undef, "Error looking up file");
4145         }
4146         $ftype = git_get_type($hash);
4147         if ($ftype !~ "blob") {
4148                 die_error('400 Bad Request', "Object is not a blob");
4149         }
4150         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4151               $file_name, $hash_base)
4152                 or die_error(undef, "Open git-blame failed");
4153         git_header_html();
4154         my $formats_nav =
4155                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4156                         "blob") .
4157                 " | " .
4158                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4159                         "history") .
4160                 " | " .
4161                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4162                         "HEAD");
4163         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4164         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4165         git_print_page_path($file_name, $ftype, $hash_base);
4166         my @rev_color = (qw(light2 dark2));
4167         my $num_colors = scalar(@rev_color);
4168         my $current_color = 0;
4169         my $last_rev;
4170         print <<HTML;
4171 <div class="page_body">
4172 <table class="blame">
4173 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4174 HTML
4175         my %metainfo = ();
4176         while (1) {
4177                 $_ = <$fd>;
4178                 last unless defined $_;
4179                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4180                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4181                 if (!exists $metainfo{$full_rev}) {
4182                         $metainfo{$full_rev} = {};
4183                 }
4184                 my $meta = $metainfo{$full_rev};
4185                 while (<$fd>) {
4186                         last if (s/^\t//);
4187                         if (/^(\S+) (.*)$/) {
4188                                 $meta->{$1} = $2;
4189                         }
4190                 }
4191                 my $data = $_;
4192                 chomp $data;
4193                 my $rev = substr($full_rev, 0, 8);
4194                 my $author = $meta->{'author'};
4195                 my %date = parse_date($meta->{'author-time'},
4196                                       $meta->{'author-tz'});
4197                 my $date = $date{'iso-tz'};
4198                 if ($group_size) {
4199                         $current_color = ++$current_color % $num_colors;
4200                 }
4201                 print "<tr class=\"$rev_color[$current_color]\">\n";
4202                 if ($group_size) {
4203                         print "<td class=\"sha1\"";
4204                         print " title=\"". esc_html($author) . ", $date\"";
4205                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4206                         print ">";
4207                         print $cgi->a({-href => href(action=>"commit",
4208                                                      hash=>$full_rev,
4209                                                      file_name=>$file_name)},
4210                                       esc_html($rev));
4211                         print "</td>\n";
4212                 }
4213                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4214                         or die_error(undef, "Open git-rev-parse failed");
4215                 my $parent_commit = <$dd>;
4216                 close $dd;
4217                 chomp($parent_commit);
4218                 my $blamed = href(action => 'blame',
4219                                   file_name => $meta->{'filename'},
4220                                   hash_base => $parent_commit);
4221                 print "<td class=\"linenr\">";
4222                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4223                                 -id => "l$lineno",
4224                                 -class => "linenr" },
4225                               esc_html($lineno));
4226                 print "</td>";
4227                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4228                 print "</tr>\n";
4229         }
4230         print "</table>\n";
4231         print "</div>";
4232         close $fd
4233                 or print "Reading blob failed\n";
4234         git_footer_html();
4235 }
4236
4237 sub git_tags {
4238         my $head = git_get_head_hash($project);
4239         git_header_html();
4240         git_print_page_nav('','', $head,undef,$head);
4241         git_print_header_div('summary', $project);
4242
4243         my @tagslist = git_get_tags_list();
4244         if (@tagslist) {
4245                 git_tags_body(\@tagslist);
4246         }
4247         git_footer_html();
4248 }
4249
4250 sub git_heads {
4251         my $head = git_get_head_hash($project);
4252         git_header_html();
4253         git_print_page_nav('','', $head,undef,$head);
4254         git_print_header_div('summary', $project);
4255
4256         my @headslist = git_get_heads_list();
4257         if (@headslist) {
4258                 git_heads_body(\@headslist, $head);
4259         }
4260         git_footer_html();
4261 }
4262
4263 sub git_blob_plain {
4264         my $type = shift;
4265         my $expires;
4266
4267         if (!defined $hash) {
4268                 if (defined $file_name) {
4269                         my $base = $hash_base || git_get_head_hash($project);
4270                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4271                                 or die_error(undef, "Error lookup file");
4272                 } else {
4273                         die_error(undef, "No file name defined");
4274                 }
4275         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4276                 # blobs defined by non-textual hash id's can be cached
4277                 $expires = "+1d";
4278         }
4279
4280         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4281                 or die_error(undef, "Open git-cat-file blob '$hash' failed");
4282
4283         # content-type (can include charset)
4284         $type = blob_contenttype($fd, $file_name, $type);
4285
4286         # "save as" filename, even when no $file_name is given
4287         my $save_as = "$hash";
4288         if (defined $file_name) {
4289                 $save_as = $file_name;
4290         } elsif ($type =~ m/^text\//) {
4291                 $save_as .= '.txt';
4292         }
4293
4294         print $cgi->header(
4295                 -type => $type,
4296                 -expires => $expires,
4297                 -content_disposition => 'inline; filename="' . $save_as . '"');
4298         undef $/;
4299         binmode STDOUT, ':raw';
4300         print <$fd>;
4301         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4302         $/ = "\n";
4303         close $fd;
4304 }
4305
4306 sub git_blob {
4307         my $expires;
4308
4309         if (!defined $hash) {
4310                 if (defined $file_name) {
4311                         my $base = $hash_base || git_get_head_hash($project);
4312                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4313                                 or die_error(undef, "Error lookup file");
4314                 } else {
4315                         die_error(undef, "No file name defined");
4316                 }
4317         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4318                 # blobs defined by non-textual hash id's can be cached
4319                 $expires = "+1d";
4320         }
4321
4322         my ($have_blame) = gitweb_check_feature('blame');
4323         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4324                 or die_error(undef, "Couldn't cat $file_name, $hash");
4325         my $mimetype = blob_mimetype($fd, $file_name);
4326         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4327                 close $fd;
4328                 return git_blob_plain($mimetype);
4329         }
4330         # we can have blame only for text/* mimetype
4331         $have_blame &&= ($mimetype =~ m!^text/!);
4332
4333         git_header_html(undef, $expires);
4334         my $formats_nav = '';
4335         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4336                 if (defined $file_name) {
4337                         if ($have_blame) {
4338                                 $formats_nav .=
4339                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4340                                                 "blame") .
4341                                         " | ";
4342                         }
4343                         $formats_nav .=
4344                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4345                                         "history") .
4346                                 " | " .
4347                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4348                                         "raw") .
4349                                 " | " .
4350                                 $cgi->a({-href => href(action=>"blob",
4351                                                        hash_base=>"HEAD", file_name=>$file_name)},
4352                                         "HEAD");
4353                 } else {
4354                         $formats_nav .=
4355                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4356                                         "raw");
4357                 }
4358                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4359                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4360         } else {
4361                 print "<div class=\"page_nav\">\n" .
4362                       "<br/><br/></div>\n" .
4363                       "<div class=\"title\">$hash</div>\n";
4364         }
4365         git_print_page_path($file_name, "blob", $hash_base);
4366         print "<div class=\"page_body\">\n";
4367         if ($mimetype =~ m!^image/!) {
4368                 print qq!<img type="$mimetype"!;
4369                 if ($file_name) {
4370                         print qq! alt="$file_name" title="$file_name"!;
4371                 }
4372                 print qq! src="! .
4373                       href(action=>"blob_plain", hash=>$hash,
4374                            hash_base=>$hash_base, file_name=>$file_name) .
4375                       qq!" />\n!;
4376         } else {
4377                 my $nr;
4378                 while (my $line = <$fd>) {
4379                         chomp $line;
4380                         $nr++;
4381                         $line = untabify($line);
4382                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4383                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4384                 }
4385         }
4386         close $fd
4387                 or print "Reading blob failed.\n";
4388         print "</div>";
4389         git_footer_html();
4390 }
4391
4392 sub git_tree {
4393         if (!defined $hash_base) {
4394                 $hash_base = "HEAD";
4395         }
4396         if (!defined $hash) {
4397                 if (defined $file_name) {
4398                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4399                 } else {
4400                         $hash = $hash_base;
4401                 }
4402         }
4403         $/ = "\0";
4404         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4405                 or die_error(undef, "Open git-ls-tree failed");
4406         my @entries = map { chomp; $_ } <$fd>;
4407         close $fd or die_error(undef, "Reading tree failed");
4408         $/ = "\n";
4409
4410         my $refs = git_get_references();
4411         my $ref = format_ref_marker($refs, $hash_base);
4412         git_header_html();
4413         my $basedir = '';
4414         my ($have_blame) = gitweb_check_feature('blame');
4415         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4416                 my @views_nav = ();
4417                 if (defined $file_name) {
4418                         push @views_nav,
4419                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4420                                         "history"),
4421                                 $cgi->a({-href => href(action=>"tree",
4422                                                        hash_base=>"HEAD", file_name=>$file_name)},
4423                                         "HEAD"),
4424                 }
4425                 my $snapshot_links = format_snapshot_links($hash);
4426                 if (defined $snapshot_links) {
4427                         # FIXME: Should be available when we have no hash base as well.
4428                         push @views_nav, $snapshot_links;
4429                 }
4430                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4431                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4432         } else {
4433                 undef $hash_base;
4434                 print "<div class=\"page_nav\">\n";
4435                 print "<br/><br/></div>\n";
4436                 print "<div class=\"title\">$hash</div>\n";
4437         }
4438         if (defined $file_name) {
4439                 $basedir = $file_name;
4440                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4441                         $basedir .= '/';
4442                 }
4443         }
4444         git_print_page_path($file_name, 'tree', $hash_base);
4445         print "<div class=\"page_body\">\n";
4446         print "<table class=\"tree\">\n";
4447         my $alternate = 1;
4448         # '..' (top directory) link if possible
4449         if (defined $hash_base &&
4450             defined $file_name && $file_name =~ m![^/]+$!) {
4451                 if ($alternate) {
4452                         print "<tr class=\"dark\">\n";
4453                 } else {
4454                         print "<tr class=\"light\">\n";
4455                 }
4456                 $alternate ^= 1;
4457
4458                 my $up = $file_name;
4459                 $up =~ s!/?[^/]+$!!;
4460                 undef $up unless $up;
4461                 # based on git_print_tree_entry
4462                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4463                 print '<td class="list">';
4464                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4465                                              file_name=>$up)},
4466                               "..");
4467                 print "</td>\n";
4468                 print "<td class=\"link\"></td>\n";
4469
4470                 print "</tr>\n";
4471         }
4472         foreach my $line (@entries) {
4473                 my %t = parse_ls_tree_line($line, -z => 1);
4474
4475                 if ($alternate) {
4476                         print "<tr class=\"dark\">\n";
4477                 } else {
4478                         print "<tr class=\"light\">\n";
4479                 }
4480                 $alternate ^= 1;
4481
4482                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4483
4484                 print "</tr>\n";
4485         }
4486         print "</table>\n" .
4487               "</div>";
4488         git_footer_html();
4489 }
4490
4491 sub git_snapshot {
4492         my @supported_fmts = gitweb_check_feature('snapshot');
4493         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4494
4495         my $format = $cgi->param('sf');
4496         if (!@supported_fmts) {
4497                 die_error('403 Permission denied', "Permission denied");
4498         }
4499         # default to first supported snapshot format
4500         $format ||= $supported_fmts[0];
4501         if ($format !~ m/^[a-z0-9]+$/) {
4502                 die_error(undef, "Invalid snapshot format parameter");
4503         } elsif (!exists($known_snapshot_formats{$format})) {
4504                 die_error(undef, "Unknown snapshot format");
4505         } elsif (!grep($_ eq $format, @supported_fmts)) {
4506                 die_error(undef, "Unsupported snapshot format");
4507         }
4508
4509         if (!defined $hash) {
4510                 $hash = git_get_head_hash($project);
4511         }
4512
4513         my $name = $project;
4514         $name =~ s,([^/])/*\.git$,$1,;
4515         $name = basename($name);
4516         my $filename = to_utf8($name);
4517         $name =~ s/\047/\047\\\047\047/g;
4518         my $cmd;
4519         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4520         $cmd = quote_command(
4521                 git_cmd(), 'archive',
4522                 "--format=$known_snapshot_formats{$format}{'format'}",
4523                 "--prefix=$name/", $hash);
4524         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4525                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4526         }
4527
4528         print $cgi->header(
4529                 -type => $known_snapshot_formats{$format}{'type'},
4530                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4531                 -status => '200 OK');
4532
4533         open my $fd, "-|", $cmd
4534                 or die_error(undef, "Execute git-archive failed");
4535         binmode STDOUT, ':raw';
4536         print <$fd>;
4537         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4538         close $fd;
4539 }
4540
4541 sub git_log {
4542         my $head = git_get_head_hash($project);
4543         if (!defined $hash) {
4544                 $hash = $head;
4545         }
4546         if (!defined $page) {
4547                 $page = 0;
4548         }
4549         my $refs = git_get_references();
4550
4551         my @commitlist = parse_commits($hash, 101, (100 * $page));
4552
4553         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4554
4555         git_header_html();
4556         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4557
4558         if (!@commitlist) {
4559                 my %co = parse_commit($hash);
4560
4561                 git_print_header_div('summary', $project);
4562                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4563         }
4564         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4565         for (my $i = 0; $i <= $to; $i++) {
4566                 my %co = %{$commitlist[$i]};
4567                 next if !%co;
4568                 my $commit = $co{'id'};
4569                 my $ref = format_ref_marker($refs, $commit);
4570                 my %ad = parse_date($co{'author_epoch'});
4571                 git_print_header_div('commit',
4572                                "<span class=\"age\">$co{'age_string'}</span>" .
4573                                esc_html($co{'title'}) . $ref,
4574                                $commit);
4575                 print "<div class=\"title_text\">\n" .
4576                       "<div class=\"log_link\">\n" .
4577                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4578                       " | " .
4579                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4580                       " | " .
4581                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4582                       "<br/>\n" .
4583                       "</div>\n" .
4584                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4585                       "</div>\n";
4586
4587                 print "<div class=\"log_body\">\n";
4588                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4589                 print "</div>\n";
4590         }
4591         if ($#commitlist >= 100) {
4592                 print "<div class=\"page_nav\">\n";
4593                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4594                                -accesskey => "n", -title => "Alt-n"}, "next");
4595                 print "</div>\n";
4596         }
4597         git_footer_html();
4598 }
4599
4600 sub git_commit {
4601         $hash ||= $hash_base || "HEAD";
4602         my %co = parse_commit($hash);
4603         if (!%co) {
4604                 die_error(undef, "Unknown commit object");
4605         }
4606         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4607         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4608
4609         my $parent  = $co{'parent'};
4610         my $parents = $co{'parents'}; # listref
4611
4612         # we need to prepare $formats_nav before any parameter munging
4613         my $formats_nav;
4614         if (!defined $parent) {
4615                 # --root commitdiff
4616                 $formats_nav .= '(initial)';
4617         } elsif (@$parents == 1) {
4618                 # single parent commit
4619                 $formats_nav .=
4620                         '(parent: ' .
4621                         $cgi->a({-href => href(action=>"commit",
4622                                                hash=>$parent)},
4623                                 esc_html(substr($parent, 0, 7))) .
4624                         ')';
4625         } else {
4626                 # merge commit
4627                 $formats_nav .=
4628                         '(merge: ' .
4629                         join(' ', map {
4630                                 $cgi->a({-href => href(action=>"commit",
4631                                                        hash=>$_)},
4632                                         esc_html(substr($_, 0, 7)));
4633                         } @$parents ) .
4634                         ')';
4635         }
4636
4637         if (!defined $parent) {
4638                 $parent = "--root";
4639         }
4640         my @difftree;
4641         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4642                 @diff_opts,
4643                 (@$parents <= 1 ? $parent : '-c'),
4644                 $hash, "--"
4645                 or die_error(undef, "Open git-diff-tree failed");
4646         @difftree = map { chomp; $_ } <$fd>;
4647         close $fd or die_error(undef, "Reading git-diff-tree failed");
4648
4649         # non-textual hash id's can be cached
4650         my $expires;
4651         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4652                 $expires = "+1d";
4653         }
4654         my $refs = git_get_references();
4655         my $ref = format_ref_marker($refs, $co{'id'});
4656
4657         git_header_html(undef, $expires);
4658         git_print_page_nav('commit', '',
4659                            $hash, $co{'tree'}, $hash,
4660                            $formats_nav);
4661
4662         if (defined $co{'parent'}) {
4663                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4664         } else {
4665                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4666         }
4667         print "<div class=\"title_text\">\n" .
4668               "<table class=\"object_header\">\n";
4669         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4670               "<tr>" .
4671               "<td></td><td> $ad{'rfc2822'}";
4672         if ($ad{'hour_local'} < 6) {
4673                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4674                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4675         } else {
4676                 printf(" (%02d:%02d %s)",
4677                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4678         }
4679         print "</td>" .
4680               "</tr>\n";
4681         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4682         print "<tr><td></td><td> $cd{'rfc2822'}" .
4683               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4684               "</td></tr>\n";
4685         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4686         print "<tr>" .
4687               "<td>tree</td>" .
4688               "<td class=\"sha1\">" .
4689               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4690                        class => "list"}, $co{'tree'}) .
4691               "</td>" .
4692               "<td class=\"link\">" .
4693               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4694                       "tree");
4695         my $snapshot_links = format_snapshot_links($hash);
4696         if (defined $snapshot_links) {
4697                 print " | " . $snapshot_links;
4698         }
4699         print "</td>" .
4700               "</tr>\n";
4701
4702         foreach my $par (@$parents) {
4703                 print "<tr>" .
4704                       "<td>parent</td>" .
4705                       "<td class=\"sha1\">" .
4706                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4707                                class => "list"}, $par) .
4708                       "</td>" .
4709                       "<td class=\"link\">" .
4710                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4711                       " | " .
4712                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4713                       "</td>" .
4714                       "</tr>\n";
4715         }
4716         print "</table>".
4717               "</div>\n";
4718
4719         print "<div class=\"page_body\">\n";
4720         git_print_log($co{'comment'});
4721         print "</div>\n";
4722
4723         git_difftree_body(\@difftree, $hash, @$parents);
4724
4725         git_footer_html();
4726 }
4727
4728 sub git_object {
4729         # object is defined by:
4730         # - hash or hash_base alone
4731         # - hash_base and file_name
4732         my $type;
4733
4734         # - hash or hash_base alone
4735         if ($hash || ($hash_base && !defined $file_name)) {
4736                 my $object_id = $hash || $hash_base;
4737
4738                 open my $fd, "-|", quote_command(
4739                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4740                         or die_error('404 Not Found', "Object does not exist");
4741                 $type = <$fd>;
4742                 chomp $type;
4743                 close $fd
4744                         or die_error('404 Not Found', "Object does not exist");
4745
4746         # - hash_base and file_name
4747         } elsif ($hash_base && defined $file_name) {
4748                 $file_name =~ s,/+$,,;
4749
4750                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4751                         or die_error('404 Not Found', "Base object does not exist");
4752
4753                 # here errors should not hapen
4754                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4755                         or die_error(undef, "Open git-ls-tree failed");
4756                 my $line = <$fd>;
4757                 close $fd;
4758
4759                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4760                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4761                         die_error('404 Not Found', "File or directory for given base does not exist");
4762                 }
4763                 $type = $2;
4764                 $hash = $3;
4765         } else {
4766                 die_error('404 Not Found', "Not enough information to find object");
4767         }
4768
4769         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4770                                           hash=>$hash, hash_base=>$hash_base,
4771                                           file_name=>$file_name),
4772                              -status => '302 Found');
4773 }
4774
4775 sub git_blobdiff {
4776         my $format = shift || 'html';
4777
4778         my $fd;
4779         my @difftree;
4780         my %diffinfo;
4781         my $expires;
4782
4783         # preparing $fd and %diffinfo for git_patchset_body
4784         # new style URI
4785         if (defined $hash_base && defined $hash_parent_base) {
4786                 if (defined $file_name) {
4787                         # read raw output
4788                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4789                                 $hash_parent_base, $hash_base,
4790                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4791                                 or die_error(undef, "Open git-diff-tree failed");
4792                         @difftree = map { chomp; $_ } <$fd>;
4793                         close $fd
4794                                 or die_error(undef, "Reading git-diff-tree failed");
4795                         @difftree
4796                                 or die_error('404 Not Found', "Blob diff not found");
4797
4798                 } elsif (defined $hash &&
4799                          $hash =~ /[0-9a-fA-F]{40}/) {
4800                         # try to find filename from $hash
4801
4802                         # read filtered raw output
4803                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4804                                 $hash_parent_base, $hash_base, "--"
4805                                 or die_error(undef, "Open git-diff-tree failed");
4806                         @difftree =
4807                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4808                                 # $hash == to_id
4809                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4810                                 map { chomp; $_ } <$fd>;
4811                         close $fd
4812                                 or die_error(undef, "Reading git-diff-tree failed");
4813                         @difftree
4814                                 or die_error('404 Not Found', "Blob diff not found");
4815
4816                 } else {
4817                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4818                 }
4819
4820                 if (@difftree > 1) {
4821                         die_error('404 Not Found', "Ambiguous blob diff specification");
4822                 }
4823
4824                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4825                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4826                 $file_name   ||= $diffinfo{'to_file'};
4827
4828                 $hash_parent ||= $diffinfo{'from_id'};
4829                 $hash        ||= $diffinfo{'to_id'};
4830
4831                 # non-textual hash id's can be cached
4832                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4833                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4834                         $expires = '+1d';
4835                 }
4836
4837                 # open patch output
4838                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4839                         '-p', ($format eq 'html' ? "--full-index" : ()),
4840                         $hash_parent_base, $hash_base,
4841                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4842                         or die_error(undef, "Open git-diff-tree failed");
4843         }
4844
4845         # old/legacy style URI
4846         if (!%diffinfo && # if new style URI failed
4847             defined $hash && defined $hash_parent) {
4848                 # fake git-diff-tree raw output
4849                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4850                 $diffinfo{'from_id'} = $hash_parent;
4851                 $diffinfo{'to_id'}   = $hash;
4852                 if (defined $file_name) {
4853                         if (defined $file_parent) {
4854                                 $diffinfo{'status'} = '2';
4855                                 $diffinfo{'from_file'} = $file_parent;
4856                                 $diffinfo{'to_file'}   = $file_name;
4857                         } else { # assume not renamed
4858                                 $diffinfo{'status'} = '1';
4859                                 $diffinfo{'from_file'} = $file_name;
4860                                 $diffinfo{'to_file'}   = $file_name;
4861                         }
4862                 } else { # no filename given
4863                         $diffinfo{'status'} = '2';
4864                         $diffinfo{'from_file'} = $hash_parent;
4865                         $diffinfo{'to_file'}   = $hash;
4866                 }
4867
4868                 # non-textual hash id's can be cached
4869                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4870                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4871                         $expires = '+1d';
4872                 }
4873
4874                 # open patch output
4875                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4876                         '-p', ($format eq 'html' ? "--full-index" : ()),
4877                         $hash_parent, $hash, "--"
4878                         or die_error(undef, "Open git-diff failed");
4879         } else  {
4880                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4881                         unless %diffinfo;
4882         }
4883
4884         # header
4885         if ($format eq 'html') {
4886                 my $formats_nav =
4887                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4888                                 "raw");
4889                 git_header_html(undef, $expires);
4890                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4891                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4892                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4893                 } else {
4894                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4895                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4896                 }
4897                 if (defined $file_name) {
4898                         git_print_page_path($file_name, "blob", $hash_base);
4899                 } else {
4900                         print "<div class=\"page_path\"></div>\n";
4901                 }
4902
4903         } elsif ($format eq 'plain') {
4904                 print $cgi->header(
4905                         -type => 'text/plain',
4906                         -charset => 'utf-8',
4907                         -expires => $expires,
4908                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4909
4910                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4911
4912         } else {
4913                 die_error(undef, "Unknown blobdiff format");
4914         }
4915
4916         # patch
4917         if ($format eq 'html') {
4918                 print "<div class=\"page_body\">\n";
4919
4920                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4921                 close $fd;
4922
4923                 print "</div>\n"; # class="page_body"
4924                 git_footer_html();
4925
4926         } else {
4927                 while (my $line = <$fd>) {
4928                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4929                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4930
4931                         print $line;
4932
4933                         last if $line =~ m!^\+\+\+!;
4934                 }
4935                 local $/ = undef;
4936                 print <$fd>;
4937                 close $fd;
4938         }
4939 }
4940
4941 sub git_blobdiff_plain {
4942         git_blobdiff('plain');
4943 }
4944
4945 sub git_commitdiff {
4946         my $format = shift || 'html';
4947         $hash ||= $hash_base || "HEAD";
4948         my %co = parse_commit($hash);
4949         if (!%co) {
4950                 die_error(undef, "Unknown commit object");
4951         }
4952
4953         # choose format for commitdiff for merge
4954         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4955                 $hash_parent = '--cc';
4956         }
4957         # we need to prepare $formats_nav before almost any parameter munging
4958         my $formats_nav;
4959         if ($format eq 'html') {
4960                 $formats_nav =
4961                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4962                                 "raw");
4963
4964                 if (defined $hash_parent &&
4965                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4966                         # commitdiff with two commits given
4967                         my $hash_parent_short = $hash_parent;
4968                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4969                                 $hash_parent_short = substr($hash_parent, 0, 7);
4970                         }
4971                         $formats_nav .=
4972                                 ' (from';
4973                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4974                                 if ($co{'parents'}[$i] eq $hash_parent) {
4975                                         $formats_nav .= ' parent ' . ($i+1);
4976                                         last;
4977                                 }
4978                         }
4979                         $formats_nav .= ': ' .
4980                                 $cgi->a({-href => href(action=>"commitdiff",
4981                                                        hash=>$hash_parent)},
4982                                         esc_html($hash_parent_short)) .
4983                                 ')';
4984                 } elsif (!$co{'parent'}) {
4985                         # --root commitdiff
4986                         $formats_nav .= ' (initial)';
4987                 } elsif (scalar @{$co{'parents'}} == 1) {
4988                         # single parent commit
4989                         $formats_nav .=
4990                                 ' (parent: ' .
4991                                 $cgi->a({-href => href(action=>"commitdiff",
4992                                                        hash=>$co{'parent'})},
4993                                         esc_html(substr($co{'parent'}, 0, 7))) .
4994                                 ')';
4995                 } else {
4996                         # merge commit
4997                         if ($hash_parent eq '--cc') {
4998                                 $formats_nav .= ' | ' .
4999                                         $cgi->a({-href => href(action=>"commitdiff",
5000                                                                hash=>$hash, hash_parent=>'-c')},
5001                                                 'combined');
5002                         } else { # $hash_parent eq '-c'
5003                                 $formats_nav .= ' | ' .
5004                                         $cgi->a({-href => href(action=>"commitdiff",
5005                                                                hash=>$hash, hash_parent=>'--cc')},
5006                                                 'compact');
5007                         }
5008                         $formats_nav .=
5009                                 ' (merge: ' .
5010                                 join(' ', map {
5011                                         $cgi->a({-href => href(action=>"commitdiff",
5012                                                                hash=>$_)},
5013                                                 esc_html(substr($_, 0, 7)));
5014                                 } @{$co{'parents'}} ) .
5015                                 ')';
5016                 }
5017         }
5018
5019         my $hash_parent_param = $hash_parent;
5020         if (!defined $hash_parent_param) {
5021                 # --cc for multiple parents, --root for parentless
5022                 $hash_parent_param =
5023                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5024         }
5025
5026         # read commitdiff
5027         my $fd;
5028         my @difftree;
5029         if ($format eq 'html') {
5030                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5031                         "--no-commit-id", "--patch-with-raw", "--full-index",
5032                         $hash_parent_param, $hash, "--"
5033                         or die_error(undef, "Open git-diff-tree failed");
5034
5035                 while (my $line = <$fd>) {
5036                         chomp $line;
5037                         # empty line ends raw part of diff-tree output
5038                         last unless $line;
5039                         push @difftree, scalar parse_difftree_raw_line($line);
5040                 }
5041
5042         } elsif ($format eq 'plain') {
5043                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5044                         '-p', $hash_parent_param, $hash, "--"
5045                         or die_error(undef, "Open git-diff-tree failed");
5046
5047         } else {
5048                 die_error(undef, "Unknown commitdiff format");
5049         }
5050
5051         # non-textual hash id's can be cached
5052         my $expires;
5053         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5054                 $expires = "+1d";
5055         }
5056
5057         # write commit message
5058         if ($format eq 'html') {
5059                 my $refs = git_get_references();
5060                 my $ref = format_ref_marker($refs, $co{'id'});
5061
5062                 git_header_html(undef, $expires);
5063                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5064                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5065                 git_print_authorship(\%co);
5066                 print "<div class=\"page_body\">\n";
5067                 if (@{$co{'comment'}} > 1) {
5068                         print "<div class=\"log\">\n";
5069                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5070                         print "</div>\n"; # class="log"
5071                 }
5072
5073         } elsif ($format eq 'plain') {
5074                 my $refs = git_get_references("tags");
5075                 my $tagname = git_get_rev_name_tags($hash);
5076                 my $filename = basename($project) . "-$hash.patch";
5077
5078                 print $cgi->header(
5079                         -type => 'text/plain',
5080                         -charset => 'utf-8',
5081                         -expires => $expires,
5082                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5083                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5084                 print "From: " . to_utf8($co{'author'}) . "\n";
5085                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5086                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5087
5088                 print "X-Git-Tag: $tagname\n" if $tagname;
5089                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5090
5091                 foreach my $line (@{$co{'comment'}}) {
5092                         print to_utf8($line) . "\n";
5093                 }
5094                 print "---\n\n";
5095         }
5096
5097         # write patch
5098         if ($format eq 'html') {
5099                 my $use_parents = !defined $hash_parent ||
5100                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5101                 git_difftree_body(\@difftree, $hash,
5102                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5103                 print "<br/>\n";
5104
5105                 git_patchset_body($fd, \@difftree, $hash,
5106                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5107                 close $fd;
5108                 print "</div>\n"; # class="page_body"
5109                 git_footer_html();
5110
5111         } elsif ($format eq 'plain') {
5112                 local $/ = undef;
5113                 print <$fd>;
5114                 close $fd
5115                         or print "Reading git-diff-tree failed\n";
5116         }
5117 }
5118
5119 sub git_commitdiff_plain {
5120         git_commitdiff('plain');
5121 }
5122
5123 sub git_history {
5124         if (!defined $hash_base) {
5125                 $hash_base = git_get_head_hash($project);
5126         }
5127         if (!defined $page) {
5128                 $page = 0;
5129         }
5130         my $ftype;
5131         my %co = parse_commit($hash_base);
5132         if (!%co) {
5133                 die_error(undef, "Unknown commit object");
5134         }
5135
5136         my $refs = git_get_references();
5137         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5138
5139         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5140                                        $file_name, "--full-history");
5141         if (!@commitlist) {
5142                 die_error('404 Not Found', "No such file or directory on given branch");
5143         }
5144
5145         if (!defined $hash && defined $file_name) {
5146                 # some commits could have deleted file in question,
5147                 # and not have it in tree, but one of them has to have it
5148                 for (my $i = 0; $i <= @commitlist; $i++) {
5149                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5150                         last if defined $hash;
5151                 }
5152         }
5153         if (defined $hash) {
5154                 $ftype = git_get_type($hash);
5155         }
5156         if (!defined $ftype) {
5157                 die_error(undef, "Unknown type of object");
5158         }
5159
5160         my $paging_nav = '';
5161         if ($page > 0) {
5162                 $paging_nav .=
5163                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5164                                                file_name=>$file_name)},
5165                                 "first");
5166                 $paging_nav .= " &sdot; " .
5167                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5168                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5169         } else {
5170                 $paging_nav .= "first";
5171                 $paging_nav .= " &sdot; prev";
5172         }
5173         my $next_link = '';
5174         if ($#commitlist >= 100) {
5175                 $next_link =
5176                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5177                                  -accesskey => "n", -title => "Alt-n"}, "next");
5178                 $paging_nav .= " &sdot; $next_link";
5179         } else {
5180                 $paging_nav .= " &sdot; next";
5181         }
5182
5183         git_header_html();
5184         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5185         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5186         git_print_page_path($file_name, $ftype, $hash_base);
5187
5188         git_history_body(\@commitlist, 0, 99,
5189                          $refs, $hash_base, $ftype, $next_link);
5190
5191         git_footer_html();
5192 }
5193
5194 sub git_search {
5195         my ($have_search) = gitweb_check_feature('search');
5196         if (!$have_search) {
5197                 die_error('403 Permission denied', "Permission denied");
5198         }
5199         if (!defined $searchtext) {
5200                 die_error(undef, "Text field empty");
5201         }
5202         if (!defined $hash) {
5203                 $hash = git_get_head_hash($project);
5204         }
5205         my %co = parse_commit($hash);
5206         if (!%co) {
5207                 die_error(undef, "Unknown commit object");
5208         }
5209         if (!defined $page) {
5210                 $page = 0;
5211         }
5212
5213         $searchtype ||= 'commit';
5214         if ($searchtype eq 'pickaxe') {
5215                 # pickaxe may take all resources of your box and run for several minutes
5216                 # with every query - so decide by yourself how public you make this feature
5217                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5218                 if (!$have_pickaxe) {
5219                         die_error('403 Permission denied', "Permission denied");
5220                 }
5221         }
5222         if ($searchtype eq 'grep') {
5223                 my ($have_grep) = gitweb_check_feature('grep');
5224                 if (!$have_grep) {
5225                         die_error('403 Permission denied', "Permission denied");
5226                 }
5227         }
5228
5229         git_header_html();
5230
5231         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5232                 my $greptype;
5233                 if ($searchtype eq 'commit') {
5234                         $greptype = "--grep=";
5235                 } elsif ($searchtype eq 'author') {
5236                         $greptype = "--author=";
5237                 } elsif ($searchtype eq 'committer') {
5238                         $greptype = "--committer=";
5239                 }
5240                 $greptype .= $searchtext;
5241                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5242                                                $greptype, '--regexp-ignore-case',
5243                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5244
5245                 my $paging_nav = '';
5246                 if ($page > 0) {
5247                         $paging_nav .=
5248                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5249                                                        searchtext=>$searchtext,
5250                                                        searchtype=>$searchtype)},
5251                                         "first");
5252                         $paging_nav .= " &sdot; " .
5253                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5254                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5255                 } else {
5256                         $paging_nav .= "first";
5257                         $paging_nav .= " &sdot; prev";
5258                 }
5259                 my $next_link = '';
5260                 if ($#commitlist >= 100) {
5261                         $next_link =
5262                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5263                                          -accesskey => "n", -title => "Alt-n"}, "next");
5264                         $paging_nav .= " &sdot; $next_link";
5265                 } else {
5266                         $paging_nav .= " &sdot; next";
5267                 }
5268
5269                 if ($#commitlist >= 100) {
5270                 }
5271
5272                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5273                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5274                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5275         }
5276
5277         if ($searchtype eq 'pickaxe') {
5278                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5279                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5280
5281                 print "<table class=\"pickaxe search\">\n";
5282                 my $alternate = 1;
5283                 $/ = "\n";
5284                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5285                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5286                         ($search_use_regexp ? '--pickaxe-regex' : ());
5287                 undef %co;
5288                 my @files;
5289                 while (my $line = <$fd>) {
5290                         chomp $line;
5291                         next unless $line;
5292
5293                         my %set = parse_difftree_raw_line($line);
5294                         if (defined $set{'commit'}) {
5295                                 # finish previous commit
5296                                 if (%co) {
5297                                         print "</td>\n" .
5298                                               "<td class=\"link\">" .
5299                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5300                                               " | " .
5301                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5302                                         print "</td>\n" .
5303                                               "</tr>\n";
5304                                 }
5305
5306                                 if ($alternate) {
5307                                         print "<tr class=\"dark\">\n";
5308                                 } else {
5309                                         print "<tr class=\"light\">\n";
5310                                 }
5311                                 $alternate ^= 1;
5312                                 %co = parse_commit($set{'commit'});
5313                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5314                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5315                                       "<td><i>$author</i></td>\n" .
5316                                       "<td>" .
5317                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5318                                               -class => "list subject"},
5319                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5320                         } elsif (defined $set{'to_id'}) {
5321                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5322
5323                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5324                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5325                                               -class => "list"},
5326                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5327                                       "<br/>\n";
5328                         }
5329                 }
5330                 close $fd;
5331
5332                 # finish last commit (warning: repetition!)
5333                 if (%co) {
5334                         print "</td>\n" .
5335                               "<td class=\"link\">" .
5336                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5337                               " | " .
5338                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5339                         print "</td>\n" .
5340                               "</tr>\n";
5341                 }
5342
5343                 print "</table>\n";
5344         }
5345
5346         if ($searchtype eq 'grep') {
5347                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5348                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5349
5350                 print "<table class=\"grep_search\">\n";
5351                 my $alternate = 1;
5352                 my $matches = 0;
5353                 $/ = "\n";
5354                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5355                         $search_use_regexp ? ('-E', '-i') : '-F',
5356                         $searchtext, $co{'tree'};
5357                 my $lastfile = '';
5358                 while (my $line = <$fd>) {
5359                         chomp $line;
5360                         my ($file, $lno, $ltext, $binary);
5361                         last if ($matches++ > 1000);
5362                         if ($line =~ /^Binary file (.+) matches$/) {
5363                                 $file = $1;
5364                                 $binary = 1;
5365                         } else {
5366                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5367                         }
5368                         if ($file ne $lastfile) {
5369                                 $lastfile and print "</td></tr>\n";
5370                                 if ($alternate++) {
5371                                         print "<tr class=\"dark\">\n";
5372                                 } else {
5373                                         print "<tr class=\"light\">\n";
5374                                 }
5375                                 print "<td class=\"list\">".
5376                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5377                                                                file_name=>"$file"),
5378                                                 -class => "list"}, esc_path($file));
5379                                 print "</td><td>\n";
5380                                 $lastfile = $file;
5381                         }
5382                         if ($binary) {
5383                                 print "<div class=\"binary\">Binary file</div>\n";
5384                         } else {
5385                                 $ltext = untabify($ltext);
5386                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5387                                         $ltext = esc_html($1, -nbsp=>1);
5388                                         $ltext .= '<span class="match">';
5389                                         $ltext .= esc_html($2, -nbsp=>1);
5390                                         $ltext .= '</span>';
5391                                         $ltext .= esc_html($3, -nbsp=>1);
5392                                 } else {
5393                                         $ltext = esc_html($ltext, -nbsp=>1);
5394                                 }
5395                                 print "<div class=\"pre\">" .
5396                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5397                                                                file_name=>"$file").'#l'.$lno,
5398                                                 -class => "linenr"}, sprintf('%4i', $lno))
5399                                         . ' ' .  $ltext . "</div>\n";
5400                         }
5401                 }
5402                 if ($lastfile) {
5403                         print "</td></tr>\n";
5404                         if ($matches > 1000) {
5405                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5406                         }
5407                 } else {
5408                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5409                 }
5410                 close $fd;
5411
5412                 print "</table>\n";
5413         }
5414         git_footer_html();
5415 }
5416
5417 sub git_search_help {
5418         git_header_html();
5419         git_print_page_nav('','', $hash,$hash,$hash);
5420         print <<EOT;
5421 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5422 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5423 the pattern entered is recognized as the POSIX extended
5424 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5425 insensitive).</p>
5426 <dl>
5427 <dt><b>commit</b></dt>
5428 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5429 EOT
5430         my ($have_grep) = gitweb_check_feature('grep');
5431         if ($have_grep) {
5432                 print <<EOT;
5433 <dt><b>grep</b></dt>
5434 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5435     a different one) are searched for the given pattern. On large trees, this search can take
5436 a while and put some strain on the server, so please use it with some consideration. Note that
5437 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5438 case-sensitive.</dd>
5439 EOT
5440         }
5441         print <<EOT;
5442 <dt><b>author</b></dt>
5443 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5444 <dt><b>committer</b></dt>
5445 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5446 EOT
5447         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5448         if ($have_pickaxe) {
5449                 print <<EOT;
5450 <dt><b>pickaxe</b></dt>
5451 <dd>All commits that caused the string to appear or disappear from any file (changes that
5452 added, removed or "modified" the string) will be listed. This search can take a while and
5453 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5454 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5455 EOT
5456         }
5457         print "</dl>\n";
5458         git_footer_html();
5459 }
5460
5461 sub git_shortlog {
5462         my $head = git_get_head_hash($project);
5463         if (!defined $hash) {
5464                 $hash = $head;
5465         }
5466         if (!defined $page) {
5467                 $page = 0;
5468         }
5469         my $refs = git_get_references();
5470
5471         my @commitlist = parse_commits($hash, 101, (100 * $page));
5472
5473         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5474         my $next_link = '';
5475         if ($#commitlist >= 100) {
5476                 $next_link =
5477                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5478                                  -accesskey => "n", -title => "Alt-n"}, "next");
5479         }
5480
5481         git_header_html();
5482         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5483         git_print_header_div('summary', $project);
5484
5485         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5486
5487         git_footer_html();
5488 }
5489
5490 ## ......................................................................
5491 ## feeds (RSS, Atom; OPML)
5492
5493 sub git_feed {
5494         my $format = shift || 'atom';
5495         my ($have_blame) = gitweb_check_feature('blame');
5496
5497         # Atom: http://www.atomenabled.org/developers/syndication/
5498         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5499         if ($format ne 'rss' && $format ne 'atom') {
5500                 die_error(undef, "Unknown web feed format");
5501         }
5502
5503         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5504         my $head = $hash || 'HEAD';
5505         my @commitlist = parse_commits($head, 150, 0, $file_name);
5506
5507         my %latest_commit;
5508         my %latest_date;
5509         my $content_type = "application/$format+xml";
5510         if (defined $cgi->http('HTTP_ACCEPT') &&
5511                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5512                 # browser (feed reader) prefers text/xml
5513                 $content_type = 'text/xml';
5514         }
5515         if (defined($commitlist[0])) {
5516                 %latest_commit = %{$commitlist[0]};
5517                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5518                 print $cgi->header(
5519                         -type => $content_type,
5520                         -charset => 'utf-8',
5521                         -last_modified => $latest_date{'rfc2822'});
5522         } else {
5523                 print $cgi->header(
5524                         -type => $content_type,
5525                         -charset => 'utf-8');
5526         }
5527
5528         # Optimization: skip generating the body if client asks only
5529         # for Last-Modified date.
5530         return if ($cgi->request_method() eq 'HEAD');
5531
5532         # header variables
5533         my $title = "$site_name - $project/$action";
5534         my $feed_type = 'log';
5535         if (defined $hash) {
5536                 $title .= " - '$hash'";
5537                 $feed_type = 'branch log';
5538                 if (defined $file_name) {
5539                         $title .= " :: $file_name";
5540                         $feed_type = 'history';
5541                 }
5542         } elsif (defined $file_name) {
5543                 $title .= " - $file_name";
5544                 $feed_type = 'history';
5545         }
5546         $title .= " $feed_type";
5547         my $descr = git_get_project_description($project);
5548         if (defined $descr) {
5549                 $descr = esc_html($descr);
5550         } else {
5551                 $descr = "$project " .
5552                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5553                          " feed";
5554         }
5555         my $owner = git_get_project_owner($project);
5556         $owner = esc_html($owner);
5557
5558         #header
5559         my $alt_url;
5560         if (defined $file_name) {
5561                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5562         } elsif (defined $hash) {
5563                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5564         } else {
5565                 $alt_url = href(-full=>1, action=>"summary");
5566         }
5567         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5568         if ($format eq 'rss') {
5569                 print <<XML;
5570 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5571 <channel>
5572 XML
5573                 print "<title>$title</title>\n" .
5574                       "<link>$alt_url</link>\n" .
5575                       "<description>$descr</description>\n" .
5576                       "<language>en</language>\n";
5577         } elsif ($format eq 'atom') {
5578                 print <<XML;
5579 <feed xmlns="http://www.w3.org/2005/Atom">
5580 XML
5581                 print "<title>$title</title>\n" .
5582                       "<subtitle>$descr</subtitle>\n" .
5583                       '<link rel="alternate" type="text/html" href="' .
5584                       $alt_url . '" />' . "\n" .
5585                       '<link rel="self" type="' . $content_type . '" href="' .
5586                       $cgi->self_url() . '" />' . "\n" .
5587                       "<id>" . href(-full=>1) . "</id>\n" .
5588                       # use project owner for feed author
5589                       "<author><name>$owner</name></author>\n";
5590                 if (defined $favicon) {
5591                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5592                 }
5593                 if (defined $logo_url) {
5594                         # not twice as wide as tall: 72 x 27 pixels
5595                         print "<logo>" . esc_url($logo) . "</logo>\n";
5596                 }
5597                 if (! %latest_date) {
5598                         # dummy date to keep the feed valid until commits trickle in:
5599                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5600                 } else {
5601                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5602                 }
5603         }
5604
5605         # contents
5606         for (my $i = 0; $i <= $#commitlist; $i++) {
5607                 my %co = %{$commitlist[$i]};
5608                 my $commit = $co{'id'};
5609                 # we read 150, we always show 30 and the ones more recent than 48 hours
5610                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5611                         last;
5612                 }
5613                 my %cd = parse_date($co{'author_epoch'});
5614
5615                 # get list of changed files
5616                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5617                         $co{'parent'} || "--root",
5618                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5619                         or next;
5620                 my @difftree = map { chomp; $_ } <$fd>;
5621                 close $fd
5622                         or next;
5623
5624                 # print element (entry, item)
5625                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5626                 if ($format eq 'rss') {
5627                         print "<item>\n" .
5628                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5629                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5630                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5631                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5632                               "<link>$co_url</link>\n" .
5633                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5634                               "<content:encoded>" .
5635                               "<![CDATA[\n";
5636                 } elsif ($format eq 'atom') {
5637                         print "<entry>\n" .
5638                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5639                               "<updated>$cd{'iso-8601'}</updated>\n" .
5640                               "<author>\n" .
5641                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5642                         if ($co{'author_email'}) {
5643                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5644                         }
5645                         print "</author>\n" .
5646                               # use committer for contributor
5647                               "<contributor>\n" .
5648                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5649                         if ($co{'committer_email'}) {
5650                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5651                         }
5652                         print "</contributor>\n" .
5653                               "<published>$cd{'iso-8601'}</published>\n" .
5654                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5655                               "<id>$co_url</id>\n" .
5656                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5657                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5658                 }
5659                 my $comment = $co{'comment'};
5660                 print "<pre>\n";
5661                 foreach my $line (@$comment) {
5662                         $line = esc_html($line);
5663                         print "$line\n";
5664                 }
5665                 print "</pre><ul>\n";
5666                 foreach my $difftree_line (@difftree) {
5667                         my %difftree = parse_difftree_raw_line($difftree_line);
5668                         next if !$difftree{'from_id'};
5669
5670                         my $file = $difftree{'file'} || $difftree{'to_file'};
5671
5672                         print "<li>" .
5673                               "[" .
5674                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5675                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5676                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5677                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5678                                       -title => "diff"}, 'D');
5679                         if ($have_blame) {
5680                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5681                                                              file_name=>$file, hash_base=>$commit),
5682                                               -title => "blame"}, 'B');
5683                         }
5684                         # if this is not a feed of a file history
5685                         if (!defined $file_name || $file_name ne $file) {
5686                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5687                                                              file_name=>$file, hash=>$commit),
5688                                               -title => "history"}, 'H');
5689                         }
5690                         $file = esc_path($file);
5691                         print "] ".
5692                               "$file</li>\n";
5693                 }
5694                 if ($format eq 'rss') {
5695                         print "</ul>]]>\n" .
5696                               "</content:encoded>\n" .
5697                               "</item>\n";
5698                 } elsif ($format eq 'atom') {
5699                         print "</ul>\n</div>\n" .
5700                               "</content>\n" .
5701                               "</entry>\n";
5702                 }
5703         }
5704
5705         # end of feed
5706         if ($format eq 'rss') {
5707                 print "</channel>\n</rss>\n";
5708         }       elsif ($format eq 'atom') {
5709                 print "</feed>\n";
5710         }
5711 }
5712
5713 sub git_rss {
5714         git_feed('rss');
5715 }
5716
5717 sub git_atom {
5718         git_feed('atom');
5719 }
5720
5721 sub git_opml {
5722         my @list = git_get_projects_list();
5723
5724         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5725         print <<XML;
5726 <?xml version="1.0" encoding="utf-8"?>
5727 <opml version="1.0">
5728 <head>
5729   <title>$site_name OPML Export</title>
5730 </head>
5731 <body>
5732 <outline text="git RSS feeds">
5733 XML
5734
5735         foreach my $pr (@list) {
5736                 my %proj = %$pr;
5737                 my $head = git_get_head_hash($proj{'path'});
5738                 if (!defined $head) {
5739                         next;
5740                 }
5741                 $git_dir = "$projectroot/$proj{'path'}";
5742                 my %co = parse_commit($head);
5743                 if (!%co) {
5744                         next;
5745                 }
5746
5747                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5748                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5749                 my $html = "$my_url?p=$proj{'path'};a=summary";
5750                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5751         }
5752         print <<XML;
5753 </outline>
5754 </body>
5755 </opml>
5756 XML
5757 }